Food Safety; Pests and Vectors; Air Quality Essay

Food Safety; Pests and Vectors; Air Quality - Essay Example Among the two approaches stated above; training the restaurant employees seems more practicable and productive. This approach has also been applied at Philadelphia in 2009; Don Sapatkin (2009) explains that they adapted a risk-based approach in which emphasis was given to food worker’s knowledge and behavior. It is very important for them to comprehend as to how contamination is spread and how to prevent it. Frequent inspections by restaurant inspectors also play a crucial role in maintaining a good and healthy standard of food service. Personal hygiene of the workers in the restaurants is mandatory. It is noticed that restaurant owners serve much time on the cleanliness of the kitchens and tables etc. but don’t pay attention if the cooks and workers are washing their hands at regular intervals. The workers should be trained and made aware of the food-borne illnesses they are likely to transmit through their food if they are not hygiene cautious. US Food and Drug Administration (2009) states that there is another very important factor regarding food safety; which is the knowledge of temperatures for cooking specific ingredients .e.g. each portion of cooked chicken must reach a minimal internal temperature of 165F for 15 seconds. They should also be aware as to which food is more prone to develop bacteria and at what temperature they should be cooked to remove them. Workers should be urged to wear head gears whenever they are in contact with food to promote a proactive approach rather than a reactive approach. Another thing that should be monitored is that the temperatures of refrigerators are maintained at a suitable temperature. It is often noticed by inspectors that the air temperature of walk-in refrigerators are kept warm. Question 2: Describe the recommendations you would give the public to prevent further spread of West Nile Virus by mosquitoes. Describe the

Article Response Essay Example | Topics and Well Written Essays - 500 words - 2

Article Response - Essay Example Ziegelman then provides a brief history about the introduction of pickle in America in 19th century by immigrants. She terms a pickle as pungent, toxic and morally suspect. The pickle became popular due to its cheap price. Pickles were also considered by charity and health workers to be a stimulant like coffee, whiskey and tobacco. Children from poor families always had a strange fascination about pickles. Efforts were then made to transform immigrant food into American food. This began with the separation of children from their pickles. Cooking classes were established to teach immigrants about American way of cooking and homemakers were trained how to make simple American food including chowders and pies. In 1919 and 1920, New York City’s Board of Education started to feed immigrant children with American food in place of pickles. Pickles had not ceased by mid 1920s, so quotas were issued to stop immigrants from Eastern and Southern Europe. However, the pickle did not stop; Americans started to use it as diet reforms declined, and nowadays pickles are enjoyed as normal food. This story shows that one can eat any kind of food and speak any language and still be an American. Therefore, what makes an American to be an American is citizenship and not food or culture. Immigrants can be assimilated to become American without necessarily forcing them to abandon their culture and food. American society is made up of diverse communities with different cultures and behaviours, but those differences never make them less or more American than others. In my case, I eat pickles. The introduction of pickles to United States is a thrilling story that may make some people who are radical to the American culture to hate pickles. However, I think that the story just indicates how the society accepts diversities in form cultural values and ways of life. I can eat food from any community as long as they do not have any negative health effects. Pickles have been eaten

Fed Corner Truncated Microstrip Patch Antenna

Fed Corner Truncated Microstrip Patch Antenna Ultra-Wide band communications attracted great interest of researchers as it has become one of the most promising technologies for short range mobile systems, Personal Area Networks (PAN) and high speed indoor data communication applications. FCC mentioned parameters for the complete functioning of UWB antennas and they have to cover the bandwidth specified by FCC to attain adequate performance. UWB has the advantage of high data rates with extremely low interference to other narrow band systems. The ultra short pulses provide extremely good spatial resolution, as the range provided by UWB is enough to seize down the major applications of daily life like in ground penetrating radars, parking radars, biomedical imaging, precision tracking and location finding. Various types of UWB antennas have been proposed and implemented with different feeding techniques, such as transmission line, probe feed, dual feed and coplanar waveguides (CPW). A compact antenna design fed by coplanar waveguide (CPW) is proposed. Overall dimensions of antenna are 28ÃÆ'-24 mm2. The design is fabricated and further analyzed to confirm its proper working in UWB range. The design of antenna is quite flexible as fiddling with the patch of microstrip antenna has been done in order to enhance the bandwidth which is the most valued obsession in the current environment. On the other hand, CPW has many advantages such as low radiation leakage, less dispersion at higher frequency, small mutual coupling between two adjacent lines which is helpful to place circuit elements close together without adding an additional layer of substrate and coplanar capability. Using CPW as feeding structure to excite a patch antenna has become very popular recently. The proposed antenna offers an excellent performance for UWB systems by providing bandwidth ranging up to 15.65GHz. Critical design parameters return loss and radiation patterns are investigated in detail. Proposed antenna provides good impedance matching, stable gain characteristics and consistent radiation patterns over its almost whole frequency band of interest. Chapter 1 Introduction Project Overview IEEE defines antenna as a device for radiating and receiving electromagnetic waves. They are used both as transmitter and receiver. This is era of wireless communication. Antennas are an important means of wireless communications now days. The need of time is compact small size antennas with enhanced bandwidth and gain. Amongst all antenna types microstrip patch antennas are most common. They are light in weight and consume low power. But patch antennas have disadvantage that they have narrow bandwidth. Many techniques are used to enhance bandwidth. Ultrawide band antennas have many applications and for many years they have been used for broadband and spread spectrum features in radar systems. The UWB performances of antennas result from excitation by non-sinusoidal signals with quickly time-varying performances [1]. UWB are low power consumption antennas and are for unlicensed applications. As name suggests, they have broad spectrum. Problem Statement Ultra wideband technology is used in low power, short range and high bandwidth communication. In UWB; through spreading information can be transmitted over a larger bandwidth and spectrum is also shared with the other users at the same time. Federal Communication Commission (FCC) allocated the license free band of 3.1GHz-10.6GHz for use in UWB applications. Since then there is a growing demand of UWB antennas for high data rate applications i.e. wireless personal area network (WPAN). UWB has had a important effect on antenna design. The major challenge in UWB antenna design is to achieve wide impedance bandwidth and stable gain while maintaining high radiation efficiency. Project Objective The purpose of this project is to design, stimulate, analyze and fabricate ultra wide band antenna using co-planer waveguide. Design and analysis of a compact antenna fed by CPW for UWB Applications is proposed Bandwidth of the proposed antenna is 15.65 GHz. Antenna offers an excellent performance for ultra-wide band systems by providing an ultra-wide bandwidth ranging from 3.1 18.75 GHz. Gain of the proposed antenna is 4.91dBi over its almost whole frequency band of interest Small size of antenna makes it suitable for applications which demand miniaturization of antenna structure and input impedance of 50 à ¢Ã¢â‚¬Å¾Ã‚ ¦. Methodology We have simulated the designed antenna using Ansoft HFSS. Then the simulated antenna is fabricated and tested on the network analyzer. The simulated and measured results are also explained. Organization of the thesis This report is divided into 6 chapters. Chapter 2 presents the fundamental parameters of antenna. This includes an explanation of various parameters related to antenna performance including radiation intensity ,radiation pattern, power density , gain, directivity and polarization etc. Chapter 3 discusses the Microstrip Patch Antenna and Feeding techniques. Chapter 4 includes Ultra wide band microstrip patch antenna, history of UWB antennas, their features and advantages. Chapter 5 describes antenna design, simulated results, 2D and 3D radiation patterns for different frequencies and fabricated results. Chapter 6 concludes the entire work done throughout the designing of proposed antenna. Conclusion and future work helps to explore enormity of the subject. Chapter 2 Fundamental Parameters of Antenna 2.1 Radiation Pattern The radiation pattern describes the strength of the radiated field in different directions from the antenna, at a constant distance. The radiation pattern is also reception pattern, as it describes the receiving properties of the antenna. It is defined as a mathematical function or a graphical representation of the radiation properties of antenna as a function of space coordinates. In most cases the radiation pattern is determined in far field regions and is defined as a function of the directional coordinates. Radiation properties include power flux density, radiation intensity, field strength, directivity phase or polarization [2]. The radiation pattern is three-dimensional, but measured patterns are usually two dimensional in vertical or horizontal plane view. These measured patterns are presented in either rectangular or polar format. Following figure shows radiation pattern of an antenna in polar plane and Cartesian coordinate systems. http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/images/0900aecd806a1a3e_null_null_null_08_07_07-03.jpg Figure-2.1: Radiation Pattern of an antenna in Cartesian and polar coordinates Radiation patterns are further categorized as relative and absolute radiation patterns. Absolute radiation patterns have absolute units of power or field strength. Relative radiation patterns are presented in relative units of power or field strength. The radiation measurement patterns are mostly relative to isotropic antennas, absolute gain of the antenna is established by antenna gain transfer method. The radiation pattern varies with the distance i.e. the patterns in near filed and far filed are different. The field pattern that exists close to the antenna is known as near filed, and far-field refers to the field pattern that exists at large distances. The far-field is called radiation field. Radiation field and power are what is commonly of interest, so antenna patterns are generally measured in the far-field region. For antenna pattern measurement the distance should be chose large enough not to be in near-field or in far field. The minimum allowed distance depends on the dimensions of the antenna relative to the wavelength. The formula for this distance is: rmin = 2d2/ÃŽÂ » (2.1) Where, rmin is the minimum distance from the antenna d is the largest dimension of the antenna ÃŽÂ » is the wavelength. 2.1.1 Radiation Pattern Lobes Radiation lobes are defines as portion of radiation pattern bounded by regions of relatively weak radiation intensity [3]. These lobes are categorized as follow Major Lobes Minor Lobes Side Lobes Back Lobes 2.1.2 Major Lobe A major lobe is defined as the radiation lobe containing the direction of maximum radiation [2]. Normally an antenna has one major lobe. 2.1.3 Minor Lobe Any lobe except major lobe is called minor lobe. It usually represents the radiation pattern which is not desirable. 2.1.4 Side Lobe A side lobe is a radiation lobe in any direction other than the main lobe [2]. Usually a side lobe is next to the main lobe and is in direction to the main lobe. 2.1.5 Back Lobe A back lobe is a radiation lobe whose axis makes an angle of approximately 180 ° with respect to the beam of an antenna or that is directed away from the main lobe [2]. File:Typical Antenna Pattern.jpg Figure 2.2: An illustration of major and minor lobes of radiation pattern 2.2 Field Regions The antenna fields are divided into three regions Reactive near field Radiating near field (Fresnel) Far field (Fraunhofer) http://www.nearfield.com/images/theory-ffdist.jpg Figure 2.3: Figure of Near Field and Far Field Regions 2.2.1 Reactive Near Filed It is the region immediately around the antenna. In this region the reactive filed predominates. The distance of this filed with antenna is usually R 2.2.2 Radiating Near Field (Fresnel) Radiating near filed is defines as that region of the field of an antenna between the reactive near-filed and the far-filed region wherein radiation fields predominate and wherein the angular field distribution is dependent upon the distance from the antenna [2]. The distance of inner boundary is R 2.2.3 Far Field Region (Fraunhofer) Far Field region is defined as that region of the field of an antenna where the angular filed distribution is essentially independent of the distance from the antenna [2]. 2.3 Radiation Intensity Radiation Intensity is the power radiated from an antenna per unit solid angle. It is the parameter of far field radiation. 2.4 Directivity Directivity is figure of merit for antennas. It is the power density an antenna radiates in direction of maximum radiation to the average power density radiated by an isotropic antenna. Directivity for an isotropic antenna is always unity. It is expressed as D= (2.2a) (2.2b) Where, D is directivity and U is radiation intensity, Uo is Intensity if an isotropic source and Prad is total radiation power. 2.5 Gain The gain and directivity of an antenna are closely related to each other. However for gain in denominator it is total power accepted by an antenna rather than total power radiated by an antenna. G= (2.3) Gain is dimensionless. According to IEEE standards, gain doesnt include losses arising from impedance mismatching or polarization mismatches. 2.6 Bandwidth The bandwidth is basically the difference or range between highest and lowest frequencies on which an antenna is operated. It is advantageous to have an antenna with high bandwidth. The bandwidth is expressed in term of ratio of upper cut off to the lower cutoff for broadband antennas. 2.7 Beamwidth Beamwidth is the angle usually measured in degrees; between the -3dB power radiated in the main lobe of radiation pattern. img383 Figure 2.4: Illustration of Beamwidth 2.8 Return Loss It is the amount of power that is reflected back in to the transmission line due to mismatching or any other error. It is the efficiency of power delivered to the load from the transmission line. Mathematical representation of Return loss is RL = 10log (2.4) Return loss is measured in dB. http://www.mwrf.com/Files/30/11240/Figure_05.gif Figure 2.5: Return Loss 2.9 Polarization Polarization is defined as point of reference of the electric field of the wave radiated by the antenna. It is categorized in three types: Linear Circular Elliptical 2.9.1 Linear Polarization When there is zero phase difference between x and y component of a wave then polarization is called linear polarization. Linear polarization is further divided into Horizontal polarization Vertical polarization http://www.ccrs.nrcan.gc.ca/glossary/images/3104.gif Figure 2.6: Linear Polarization 2.9.1.1 Horizontal Polarization Horizontal polarization is the one in which wave propagates in x-direction and there is no propagation along y direction. A horizontally polarized wave is explained as a function of time T and E-field position Ex = E1 sin ( É ·t à ¡Ã‚ µÃ‚ z) (2.5) http://www.cfht.hawaii.edu/~manset/PolHoriz.gif Figure 2.7: Horizontal Polarization 2.9.1.2 Vertical Polarization Vertical polarization is the one in which wave propagates in y-direction and there is no propagation along x direction. It can be written in mathematical form as Ey = E2 sin ( É ·t à ¡Ã‚ µÃ‚ z) (2.6) http://www.cfht.hawaii.edu/~manset/PolVert.gif Figure 2.8: Vertical Polarization 2.9.2 Circular Polarization If there is equal phase difference between two waves then there is circular polarization, either clockwise or anticlockwise. Wave moving in clockwise rotation is said to be left circularly polarized and the one propagating in counterclockwise rotation is right circularly polarized. Mathematically it is defined as Ex = E1 sin (É ·t à ¡Ã‚ µÃ‚ z) (2.7) Ey = E2 sin (É ·t à ¡Ã‚ µÃ‚ z + ÃŽÂ ´) (2.8) E1 is the amplitude of wave linearly polarized in x direction. E2 is the amplitude of wave linearly polarized in y direction. ÃŽÂ ´ is the phase difference. http://www.cfht.hawaii.edu/~manset/PolCirc.gif Figure 2.9: Circular Polarization 2.9.3 Elliptical Polarization If two waves have unequal amplitude or phase then there is elliptical polarization. graphic 1 Figure 2.10 (a): Graphical Representation of Elliptical Polarization http://www.nsm.buffalo.edu/~jochena/images/elliptic2.gif Figure 2.10 (b): 3-D view of Elliptical Polarization 2.10 Voltage Standing Ratio VSWR is the ratio between maximum voltage and the minimum voltage. If there is a difference between load impedance and input impedance then there occurs reflection which causes instructive interference and destructive interference. Instructive and destructive interference produces maximum and minimum amplitudes respectively. Mathematical Expression for VSWR is VSWR= (2.9) http://www.microwaves101.com/encyclopedia/images/VSWR/waves5.jpg Figure 2.11: Different Voltage amplitudes at different distances 2.11 Types of antennas There are six different types of antennas [2]. Microstrip Patch Antenna Lens Antenna Wire Antenna Array Antenna Reflector Antenna Aperture Antenna 2.11.1 Microstrip Patch Antenna Microstrip patch antennas fall into the category of printed antennas [4]. A radiating patch is printed on a grounded substrate which is usually feed via a transmission line or coaxial cable. Patch can be of any shape and size i.e. circular, square, triangular or rectangular. Amongst all printed antennas i.e. Dipole, Slots, Tapered Slots antennas; Microstrip Patch Antennas are most famous. They are small in size, light in weight and low power consuming. But their bandwidths are smaller and have low gain. They are easy to integrate, good radiation control and cost of production is low. To increase bandwidth many techniques are used that is introducing slots and slits etc. They are used commercially in radars, wireless communications, satellites and mobiles etc. Figure 2.12: Microstrip patch Antenna http://images.books24x7.com/bookimages/id_22121/fig188_01.jpg Figure 2.13 (a): Rectangular Patch Antenna (b): Circular Patch Antenna Microstrip Patch antennas are used in Microwave frequency range. They are used in arrays to increase the bandwidth and gain and for other purposes. http://www.antennamagus.com/database/antennas/99/Stacked_microstrip_patch_array-antenna_design.png Figure 2.14: Array of rectangular patch antennas 2.11.2 Lens Antenna Lens antennas are used to convert spherical radiated waves into plane waves in specific direction by using a source with microwave lens. It actually stops the divergent radiated energy to spread in undesired directions. These are mostly used for the high frequencies. A lens antenna may be of concave or convex shape. They are directional antennas and can scan wider angles. In comparison to reflectors; their gain is 1 or 2 dB less. Lens antennas may be constructed of non-metallic dielectrics or of metallic (artificial) dielectrics [5]. http://www.xibao-electronictech.com/images/product/2/210Lens-Antenna.gifhttp://telecom.esa.int/telecom/media/img/largeimage/WaveguideLensAntennaPrjObj_404.jpg Figure 2.15 (a): Lens Antenna Figure 2.15 (b): Wave guide Lens Antenna 2.11.3 Wire Antenna Wire antennas consist of a simple wire that is used to radiate electromagnetic energy. These wire antennas can be of different shapes. Most commonly used are straight wire antennas i.e. dipoles, loops and helix. Beside half-wave dipoles and quarter wave monopoles, wires of arbitrary lengths are often used to form antennas. Wire antennas can be vertical, horizontal or sloppy with respect to the ground. They may be fed from centre, at end or anywhere in between. The wires can be thick or thin, the radiation of antenna depends upon the thickness of the wire. Antennas with length larger than ÃŽÂ »/2 are called Long-wire antennas. Figure 2.16 (a): Wire Antennas (a) Figure 2.16 (b): Dipole Circular loop 2.11.4 Array Antenna Array antennas are made up of more than one element basic of which is a dipole. Array antennas are the combination of radiating elements in such way that the radiation from these add up giving maximum or minimum radiation in a specific direction. They are used for higher directivity. They are made up of helices, dishes and other antennas. These elements are arranged to form broadside, end fire, collinear, driven and patristic arrays [5]. They are used in applications in which radiation cannot be achieved from single radiating element. They are low weight and low cost antennas. Examples of array antennas are Yagi-Uda, http://www.tennadyne.com/images/tennlpdanavy.JPG Figure 2.17: Log Periodic Dipole Array Antenna 2.11.5 Reflector Antenna They are widely used to modify the radiation pattern of radiating elements. They are classified as active and passive reflectors. The active reflectors have corners made up of plane surfaces and they include periscopic antennas, flat-sheet reflectors and corner-reflector antennas. An active reflector may have corner elliptical, parabolic or spherical shape. Active reflectors include parabolic dish, truncated parabola, pill box etc. Reflectors are simple in design, involve only one surface and obey simple laws of optics. The applications of reflector antennas are radars and other point to point communication systems [5]. http://www.sameercal.org/images/reflector_antenna.jpg Figure 2.18: A co-secant Reflector Antenna 2.11.6 Aperture Antenna Aperture antenna is an important antenna for space communication. As the name suggests they consist of some cavity through which electromagnetic waves are transmitted or received. Apertures may be of any shape i.e. rectangular, circular or spherical. Larger the size of antenna larger will be the gain. Aperture antennas have to be placed carefully because they have narrow beam widths. Examples of aperture antennas include waveguides, reflectors horns, slots and lenses. Aperture antennas are commonly used in aircraft and spacecraft applications. http://www.analyzemath.com/antenna_tutorials/introduction_3.gif Figure 2.18: Horn Aperture Antenna Chapter 3 Microstrip Patch Antenna and Feeding techniques 3.1 Introduction Spaceships, aircrafts and other military applications such as missiles where important constraints to consider are performance, manufacturing expenditures, smooth profile and ease of installation and now a days other systems such as wireless communication requires similar type of specifications to consider . And the basic component which is required by these listed applications for transmission of instructions or data and to receive these instructions on the receiver end is antenna. Hence to meet the requirements listed above e.g. smooth profile, cost and performance etc Microstrip antennas are used. Microstrip antennas are diminutive profile, conformable to planar and non-planar surfaces, easy and cheap to construct using the up to date printed circuit technology. Microstrip antennas have very flexible behavior to polarization, resonant-frequency, and impedance and radiation pattern. They are also used to increase the bandwidth. They consist of a ground plane over which a substrate is mounted and the radiating patch is mounted on the substrate. Generally the ground plane and the dielectric substrate have equal length and width. The Microstrip antennas are illustrated by the width, length and the height of the dielectric substrate which is sandwiched in between the ground plane and the radiating patch 3.2 Structural Configuration The structural configuration of micro strip patch antenna is shown in figure Figure 3.1: Structural Configuration of Patch Antenna It consist of a thin (t Figure 3.2: Side View of Patch Antenna The length of the patch is usually ÃŽÂ »/3 3.3 Formula for Rectangular Patch Antenna To draw the width of the patch we use the formula (3.1) And the length of the patch can be drawn as: (3.2) To reduce the fringing effects we use the following formula à ¢Ã‹â€ Ã¢â‚¬  L= 0.412h (3.3) Here à ¢Ã‹â€ Ã¢â‚¬  L is the trimmed length from antenna. (3.4) 3.4 Feeding Methods Following feeding methods are most popular and are used with microstrip antennas 1. Microstrip line feed 2. Coaxial probe feed 3. Aperture coupled feed 4. Proximity coupled feed 5. Coplanar waveguide feed These methods are either contacting or non-contacting. Contacting methods are those in which there is a direct contact between the transmission line and the radiating surface whereas in non-contacting methods, electromagnetic field coupling method is used to transfer the power. 3.4.1 Microstrip Line Feed In this feeding method, the line feed is conducting strip of small width as compared to the patch. It is the easiest feeding method; easy to fabricate and simple to model. The radiating strip is placed at radiating patchs edge and it is of the same material that is used for patch. If length of the strip is greater than the wavelength, losses will be generated. It can be reduced if the strip line has a substrate with high dielectric constant and low weight, so that the fields are confined to the strip line. A line feed of dimensions 17x3mm is used to obtain 50ÃŽÂ © input resistance. Figure 3.1: Patch with Microstrip Line Feed 3.4.2 Coaxial probe feed In coaxial probe feeds, coax inner conductor is attached to the radiating patch while the other conductor is connected to the ground plane. It is used widely. Its fabrication is easy and has low spurious radiation that is radiation outside the band frequency. It is has narrow bandwidth and it is hard to model for thick substrate. Matching also becomes difficult for thicker substrate because of increase length of probe make it more inductive, its inductance effect can be reduced by using a series of capacitors. Figure 3.2: Patch with coaxial probe feed 3.4.3 Aperture coupling feed It is the non-contacting feed. The two substrates are separated by ground plane in it. The microstrip feed line is on the bottom side of the lower substrate there is a; whose energy is coupled to the patch through a slot on the ground plane which separates the two substrates. A material with higher dielectricity is used for bottom substrate therefore, by this arrangement independent optimization of the feed mechanism and the radiating element can be carried out. For top substrate a thick, low dielectric constant material is used. The ground plane between the two substrates isolates the feed from the radiating element and minimizes the interference. The configuration is shown in the figure Figure 3.3: Patch with aperture coupling feed Matching is performed by controlling the width of the feed line and the length of the slot. Amongst all four techniques this is the hardest to fabricate and has narrow bandwidth. It is somehow easy to model and has moderate spurious radiation. 3.4.4 Proximity coupling feed In this feeding method, microstrip line is placed between two substrates and the radiating patch is placed on the upper substrate. This coupling is capacitive in nature. This coupling has the largest bandwidth as high as 13%. It is easy to model and has low spurious radiation. Its fabrication is somehow difficult. However, length of the stub help in improving the bandwidth, and width-to-line ratio of the patch can be used to control the match. The coupling feed is shown Figure 3.4: Patch with Proximity Coupling Feed 3.4.5 Coplanar Waveguide Feed This feeding technique is used when patch antenna is used in microwave monolithic integrated circuits (MMIC). The coplanar feed is fabricated on a ground plane and coupling is achieved through a slot. This feeding method reduces the radiation from feed structure because of its unusual method of coupled slot. Since CPW (coplanar waveguide) has many advantages such as low radiation leakage, less dispersion and small mutual coupling between two adjacent lines, which is helpful to place circuit elements close together without adding an additional layer of substrate, using CPW as the feeding structure to excite the patch antenna through a slot has become very popular recently. In addition, CPW structure can maintain constant characteristic impedance while varying its geometry, which provides a better impedance matching possibility Figure 3.5: Patch with Coplanar Waveguide Feed 3.3 Categorization on the basis of bandwidth:- On the basis of range of frequency bands, microstrip patch antennas can be categorized into three main classes which are: antenna for narrow band applications antenna for wide band applications antenna for ultra wideband applications Chapter 4 ULTRA WIDEBAND 4.1 Introduction A series of very short baseband pulses with time duration in nano-seconds that exist on ALL frequencies simultaneously. Pulse repetition frequency (PRF) can range from hundreds of thousands to billions of pulses/second. Very low power: 41dbm/MHz (FCC) and wide bandwidth: 3.110.6 GHz Modulation techniques include pulse-position modulation binary phase-shift keying And others Radio technology that modulates impulse based waveforms instead of continuous carrier waves 4.1.1 Narrow band vs. Wide band signals UWB could be used to Indoor, short-range communications for high data rates, OR Outdoor, long-range, but for very low data rates 4.1.2 Large Relative Bandwidth UWB is a form of extremely wide spread spectrum where RF energy is spread over gigahertz of spectrum. Wider than any narrowband system by orders of magnitude. Power seen by a narrowband system is a fraction of the total.UWB signals can be designed to look like imperceptible random noise to conventional radios 4.1.3 Large Fractional Bandwidth Large fractional bandwidth leads to High processing gain and Multipath resolution and low signal fading. Fractional Bandwidth is the ratio of signal bandwidth (10 dB) to center frequency: Bf = B / FC = 2(Fh-Fl) / (Fh+Fl) 4.1.4 Scalable Technology with Low Power UWB benefits from basic information theory results when: Signal Bandwidth >> Data Rate .Power efficient low-order modulation can be used even for relatively high data rates.Data rates can scale independent of PRF by integrating bit intervals over multiple pulse intervals 4.1.5 Multipath Performance Ultra-wide bandwidth provides robust performance in multipath environments . 4.1.6 UWB Data Rates 4.2 UWB channels Indoor Within a room (LOS NLOS) Investigates the impact of Distance Rx/Tx antenna heights Antenna polarization C:mat_dirsuwblimitsindoor5.tif UWB Emission Limit for Indoor Systems Outdoor Campus environment Low altitude Mobility C:mat_dirsuwblimitsoutdoor5.tif UWB Emission Limit for Outdoor Hand-held Systems 4.3 Emission limits for UWB UWB Emission Limits for GPRs, Wall Imaging, Medical Imaging Systems. Operation is limited to law enforcement, fire and rescue organizations, scientific research institutions, commercial mining companies, and construction companies. UWB Emission Limits for Thru-wall Imaging Surveillance Systems 4.4 Features of UWB :- Ultra-short pulses Baseband transmission Low duty

Leukemia Essay -- Health Medical Cancer

Leukemia Leukemia is a disease that affects blood-forming tissues, mainly bone marrow. Leukemia also affects the lymph glands and spleen. Leukemia causes the body to produce an extreme amount of abnormal white blood cells. This causes infections because the abnormal cells cannot stop infections like the normal cells do. Leukemia also causes anemia. Anemia is a disease in which the body makes less blood cells. This happens because the leukemic cells crowd the system. Leukemia also causes excessive bleeding. This happens because the amount of platelets will decrease and clotting will not occur, Researchers think a change in genetic structure causes leukemia. Changes in gene structure could be caused by environmental problems. Some of these problems could be: birth defects, radiation, viruses, and chemicals. Leukemia is not inherited and is not contagious. There are two major types of Leukemia, Lymphocytic and Granulocytic. In Lymphocytic Leukemia white blood cells known as Lymphocytes, which are made in the Lymph glands and bone marrow are abnormal or immature. In Granulocytic Leukemia this causes an increase in white blood cells known as granulocytes. Granulocytes are made in the bone marrow, and other tissue. Granulocytes that are affected by leukemia cannot fight of infections. There are two ways in which leukemia can occur. One is acute, and the other is chronic. Acute leukemia is found most in children. It progresses r...

Candide by Voltaire Essay

Through Candide’s perplexing adventures and enlightening encounters, Voltaire illuminates the numerous diverse cultures of which Europeans consider themselves superior. Yet rather than supporting the foreign practices of cannibalism, bestiality, and the abolishment of priests, Voltaire is ridiculing the Europeans’ own methods of torture in an abusive social hierarchy. Therefore, while freedom of expression and a consensus of the majority constitute faucets of good behavior, the European practice of elitist rule and inequitable punishments is revealed as unjust. This criticism suggests the need for reform by deriving authority from somewhere other than the traditional roles of the royalty, clergy, and nobility, a rather radical move at the time. Voltaire at first reveals the fault of Europeans through his description of the savage land of Oreillon. Upon their dissent from Paraguay, Candide and Cacambo come across two women, completely nude, who cry out and â€Å"spryly† run away from two monkeys who snap â€Å"at their buttocks† (73). Instantly sympathetic, Candide shoots his musket and kills the monkeys, thinking that he has redeemed himself from earlier sins by saving these distressed women. However, to his surprise he discovers that he has just killed the ladies’ lovers. Without questioning the practices of this foreign society, Candide reacts based on his own perceptions of right and wrong. His actions reflect the naivety of Europeans concerning what is thought to be normal based on their own â€Å"superior† culture. As punishment for Candide’s rash actions, the Oreillons attempt to roast the travelers over a spit to eat, justifying this through the proclamations that Candide and Cacambo are Jesuits and thus deserve to die. This behavior is explained by Cacambo as being â€Å"appropriate† because â€Å"if we Europeans do not exercise our right to eat others, it is because we have other ingredients for a good meal† (pg. 74). He recognizes that each society contains its own equally valid practices which cannot be altered or condemned by those who think they are predominant. In addition, Voltaire is not justifying that bestiality and cannibalism constitute a righteous society, but rather satirically commenting on the Europeans own practices, for it would be hypocritical to condemn these practices without evaluating whether the European’s own forms of punishment are just. As the innocent Candide ventures to Eldorado, he is once again introduced to a land unlike that found in contemporary Europe. Upon their arrival, the travelers bewilderingly walk upon pavement made up of rubies, emeralds, and gold and rapture in the delights of a free feast at a common inn. The generous, humble citizens then guide them to an old man and, later, even the approachable king, in order to answer their many questions. Through these communicators they come to realize that the most striking aspects of the village do not constitute its physical features, but rather its ideology. They are told that all men are free, and thus there is no need for the establishment of courts, trials, or prisons. While Candide is quite baffled by these assertions which completely contrast the structured social organization of Europe, he is even more confused by the lack of priests or an enforced religion, upon which he exclaims, â€Å"What! You have no monks who lecture, debate, govern, conspire, and burn people who don’t agree with them?† (79). These seemingly sarcastic remark is a reflection of the binary thinking in which the Europeans have taught their citizens to believe. Candide had always considered the church as an institution which interjects in every aspect of life and constantly ridicules and punishes others while denying the fact that there are other practices and religions besides the order of the church and Catholicism. Voltaire is not suggesting the elimination of priests, which would be a radical idea at the time, but is rather demonstrating a deeper criticism of Europeans who assume that they are superior and must punish all those who defy this idea. Although Oreillon and El Dorado are societies completely unlike that of the Europeans in law and culture, they are seen as portraying decent human behavior because they allow their citizens to express free will and they derive authority from the consent of the masses. For instance, in Oreillon, women are allowed to mate with whomever they please without judgement or persecution from others. This freedom of expression illustrates that the culture seeks to facilitate the happiness of its people. Additionally, when the two monkeys are murdered by Candide, the leaders instantly capture and attempt to punish the travelers, reflecting the society’s dedication to protect its citizens from harm and condemn those who impinge on basic freedoms. While this culture may seem bizarre compared to more civilized nations, the fact that it derives its authority from the people illustrates that bestiality and cannibalism are enforced as appropriate human behaviors so long as there is a general consensus. Similarly, good behavior does not necessarily need to be derived from praise towards the king or daily sacrifices to a church, as portrayed in Eldorado. Unlike in Europe, the king is humble, approachable and genuinely concerned with the welfare of his citizens. For example, the feast the travelers consume at the inn is free because the state is said to assist business, thus revealing that the government is willing to contribute to the success of its people despite their class or wealth. Therefore, despite their practices, these societies emulate good behavior. However, Voltaire forms a critic of the Europeans due to the unjust practices in which they derive and maintain authority. In Candide’s hometown of Westphalia, for example, the naive Candide is exiled from the castle of the Thunder-ten-tronckh because he kissed the Baron’s daughter, Cunegonde. He was unfairly punished because he stepped out of the social hierarchy to which he was born, while Cunegonde was not disciplined for her actions due to her rank. Similarly, in places like Paris, the elites haughtily criticize their fellow man’s creations and do not hesitate to manipulate and greedily conspire against others. When Candide is led into a ploy by the despicable Abbe and arrested even though he had not committed any crimes, he is able to buy his freedom with three diamonds. The officer then exclaims, â€Å"Ah sire, even if you committed every crime imaginable, you’re still the best man in the world† (97). One’s fate depends on the inconsiderate word of the elite, one’s wealth, and the act of bribery. Since Candide had money, he was able to secure his freedom while the majority of peasants who are near penniless would have to suffer. These scenarios represent the unjust rule of the elites over the consensus of the majority. While Voltaire formulates the components of good behavior based on the legitimacy the authority derives from its citizens, he also constitutes bad behavior as punishment without just cause. For instance, when Candide and Martin arrive in Portsmouth, they view the execution of a British Admiral. The Admiral’s crime was explained in that he had stayed too far from the French enemy and that his death would encourage others to fight more fervently during war. This nonsensical behavior represents the paradox of European punishments which reduce war heros to criminals. Another such scene is presented when Candide and Pangloss reach the city of Lisbon in which a haphazard earthquake kills thirty thousand people. Faculty of a university decide that, in order to prevent another earthquake, they must â€Å"roast several persons over a slow fire†¦ They had therefore seized a man from the Basque province who had been convicted of marrying the godmother of his godchild, and two Portuguese men, who when eating a chicken, had removed the bacon seasoning† (52-53). As a manner of electing their sacrifices, they choose those who had committed even questionable offenses, though even those forms of misconduct can be viewed as unsubstantial enough to deserve punishment, much less death. While it is firstly completely unreasonable to attribute a natural phenomenon to personal actions, Voltaire goes so far as to satirically illustrate that this is a commonsense European belief, for both offenses appear inconsequential to the victims’ punishment. Meanwhile, most Europeans would be disgusted with the culture of the Oreillons who engage in cannibalism after enacting a punishment. However, Candide’s death penalty after murdering two of its citizens is a much more equitable offense in terms of its punishment than removing bacon seasoning from chicken, such as in Europe. Furthermore, once a body has been burnt, it seems inconsequential whether it is eaten or not. Voltaire is thus able to portray the irony as well as the unjust nature of European punishments as a bad behavior of society. The figures of the time who would be most notably perturbed by Voltaire’s suggestions constitute the royalty, the nobility, and the clergy. Firstly, for centuries the royalty had uncontestedly derived authority through lineage and from claims to divine right. Candide’s embrace with the King of Eldorado would probably be perceived as strange because the royalty was considered far above the common people in class, stature, and rights, and thus did not need the consent of its citizens to govern. Thus, the monarchy would be opposed to Voltaire’s ideas because they undermine his authority. This is reflected in eighteenth century Europe when the National Assembly made a radical move by sending Louis XVI to the guillotine as a symbol of the growing dissatisfaction of the peasants and workers. Secondly, the nobility consisted of a small number of elites who mainly derived their elevated status from patronage. Voltaire’s view of this social class, at least in Paris, is illustrated in the abode of Marquise de Parolignac, in which these morose intellectuals portray that their sole interests are to spread slander, hypocritically belittle art, and greedily take advantage of Candide’s treasures. Similarly to the monarchy, Voltaire’s proposal that society’s values and laws should be supported by the consensus of the masses was a scandalous assertion because it would undermine the power of the elites and force them to surrender their privilege. Finally, the clergy’s word penetrated all aspects of life in eighteenth century Europe while Religious Orthodoxy formed local allegiances and bound communities together by preaching sacred traditions. However, it can also be said that the institutions of the church hypocritically valued their own self-preservation over educating the masses. Therefore, these religious authorities would not consent in being forced to adhere to stricter laws by having to give proper, legitimate reasons as a means to punish nonbelievers or delinquents of the church. Despite these opponents, Voltaire suggests a need for reform by deriving authority from somewhere other than the norm. Although European society appears far more advanced than that of the savages and more structured than Eldorado, that does not necessarily determine that its laws and people are superior. In fact, Voltaire constitutes good behavior in a society as something that has been consented upon by its people, while bad behavior derives from unjust punishment and the dangerous rule of elites. Voltaire thus forms a critic of Europeans through comparisons to these foreign lands and furthermore questions whether a reformation of authority is a necessary means to benefit society. Source Voltaire. Candide. Boston: Bedford/St. Martin’s, 1999.

Ch 1 H.W Consumer Behavior

Q1:describe the interrelationship between consumer behavior and the marketing concept. A1: marketing concept determine the needs and wants of specific target markets and Deliver satisfaction better than competition. consumer behavior includes all the decisions a consumer makes when spending their time and money. The what, why, when, where, and how of consumer purchases are examined in consumer behavior. It is not just individuals, but households, families, and groups that influence the decisions we make. ————————— Q2: describe the interrelationships between consumer research, market segmentation and targeting, and the development of the marketing mix for a manufacturer of HDTV sets. A2: consumer research The process and tools used to study consumer behavior. Market segmentation : Process of dividing the market into subsets of consumers with common needs or characteristics Market targeting : The selection of one or more of the segments identified to pursue.The development of the marketing mix for a manufacturer of HDTV consist the product the features ,designs and the price including discounts and the place (distribution of the product ) and promotion ( the advertising) —————————- Q3: select any one of the company web sites and product specific site pairs listed in table 1. 1 that interests you . then systematically examine each of the two sites in terms of how you as a consumer respond differently to the two sites A3:We're not going to work publicity for this company, but we want to highlight how the company deals with customers and most importantly its olicy in respect for the customer and if we see the slogan â€Å"the customer is always right† appears to us every time we press a button to complete the purchase. —————————- Q4: Discuss The Interrelationships Among Cus tomer Expectation And Satisfaction, perceive Value And Customer Retention. Why Is A Customer Relation Essential? A4 :The goal of all marketers is to build and maintain successful relationships with their consumers. This occurs by offering a product which has benefits that the consumer values.In addition, they see the value of those benefits as exceeding the cost of the product – the cost in terms of money, time, and opportunity costs. If a product delivers value, the company is likely to have a high level of customer satisfaction. They will trust the marketer and continue to purchase the product. In addition, they will tell others about the product and speak highly of it when asked or when reviewing the product online. A company with strong customer relationships will be able to achieve a high level of customer retention – their customers will not defect to the competitor or stop using their product.They will retain these customer over time and will be more profitable due to these valuable loyal customers. —————————- Q5: Discuss the role of the social and behavioral sciences in developing the consumer decision-making model. A5: The input stage includes sources of information to the consumer – how they learn and are influenced by the marketer and their environment. The process stage ties to the decision-making process the consumer undergoes when considering a purchase.It moves from the inputs to the psychological factors involved in recognizing a need, searching for information, and evaluating alternatives. The output stage involves the actual purchase and the post-purchase evaluation. —————————- Q6:Apply each of the two models depicted in Table 1. 3 (i. e. , traditional marketing and value and retention marketing) to the marketing of cellular phone services. You may want to incorporate into your answer your own and your peers experiences in selecting cellular communication providers. A6:VALUE- AND RETENTION-FOCUSED MARKETING| THE TRADITIONAL MARKETING CONCEPT| Use technology that enables customers to customize what you make. | Make only what you can sell instead of trying to sell what you make. | Focus on the product’s perceived value, as well as the need that it satisfies. | Do not focus on the product; focus on the need that it satisfies. | Utilize an understanding of customer needs to develop offerings that customers perceive as more valuable than competitors’ offerings. | Market products and services that match customers’ needs better than competitors’ offerings. Research the levels of profit associated with various consumer needs and characteristics. | Research consumer needs and characteristics. | Understand consumer behavior in relation to the company’s product. | Understand the purchase behavior process and the influences on consumer behavior. | Make each customer transaction part of an ongoing relationship with the customer. | Realize that each customer transaction is a discrete sale. | Use hybrid segmentation that combines the traditional segmentation bases with data on the customer’s purchase levels and patterns of use of the company’s products. Segment the market based on customers’ geographic, demographic, psychological, sociocultural, lifestyle, and product-usage related characteristics. | Invest in technologies that enable you to send one-to-one promotional messages via digital channels. | Target large groups of customers that share common characteristics with messages transmitted through mass media. | Use interactive communications in which messages to customers are tailored according to their responses to previous communications. | Use one-way promotions whose effectiveness is measured through sales data or marketing surveys. Create customer tiers based on both volume and consumption patterns. | Cre ate loyalty programs based on the volume purchased. | Make it very unattractive for your customers to switch to a competitor and encourage them to purchase ‘better’ – in a manner that will raise the company’s profitability levels. | Encourage customers to stay with the company and buy more. | Base your marketing budget on the ‘lifetime value’ of typical customers in each of the targeted segments compared with the resources needed to acquire them as customers. Determine marketing budgets on the basis of the numbers of customers you are trying to reach. | Conduct customer satisfaction surveys that include a component that studies the customer’s word-of-mouth about the company, and use the results immediately to enhance customer relationships. | Conduct customer satisfaction surveys and present the results to management. | Create customer intimacy and bonds with completely satisfied, ‘delighted’ customers. | Create customer tr ust and loyalty to the company and high levels of customer satisfaction. |

Writing with Rhythm

Writing with Rhythm Writing with Rhythm Writing with Rhythm By Guest Author This is a guest post by Hugh Ashton. If you want to write for Daily Writing Tips check the guidelines here. When I was substantially younger than I am now, I wrote masses of anguished adolescent poetry. My favorite verse form was the sonnet, a style and format that is maybe little surprising for a teenager to be writing. For those who slept through this part of their English course, a sonnet is a formal 14-line poem with a complex rhyme scheme in iambic pentameter. I no longer indulge in such musings, but I learned many tricks and techniques from writing my sonnets and other poems. First and foremost, writing poetry, especially formal poetry, tells you a good deal about the internal rhythms of the English language. Most of the spoken English language moves to a fundamental iambic rhythm: di-DUM di-DUM di-DUM. Put five of these together and you have a line of blank verse: Now is the winter of our discontent Or Is this the face that launched a thousand ships? Or The stars move still, time runs, the clock will strike, The devil will come, and Faustus must be damnd. In the second line of the last quotation, note how Marlowe breaks the rhythm slightly for emphasis (if you dont slur the word devil into one syllable, that is), and then reverts to the set rhythm for the second half of the line. You dont have to write in this formal style, of course, but you should make yourself aware of the internal stresses in English prose, and how they carry readers through your writing. Until relatively recently (a few hundred years ago), all reading was done out loud everyone read by vocalising the written words. When these rules of internal rhythm are broken, as in this quotation from a camera manual, the result is clotted prose prose which does not flow: Depth of field is the area of acceptable sharpness in front of and behind the subject in focus. The larger the F-number used (from F2.8 to F22), the deeper the depth of field. On the contrary, the smaller the F-number (from F22 to F2.8), the shallower this zone of acceptable sharpness. Its not bad English its free of jargon but its not good either. Another reason why these sentences do not flow is the lack of macro rhythm,the pauses for comprehension (and breath!) in the middle of a sentence. For another example, take this sentence from a recent Pentagon report: There is a crisis of confidence among Afghans in both their government and the international community that both undermines our credibility and emboldens the insurgents. If you read this out loud, its all got to be done in one breath. Theres no pattern to the sentence. By the time youve got to the end, you forget what the beginning was like. Heres a suggested rewriting: The Afghan people are experiencing a crisis of confidence in both their own government and the international community, and this is undermining our credibility, as well as emboldening the insurgents. Not perfect Id probably split this sentence into two but the sentence now has a beginning, a middle, and an end. Note how there is also an implied contrast between the Afghan people and the insurgents in my version that is somewhat lacking in the Pentagon original. Returning to my youthful bad poetry (and here is an example of super-macro rhythm in a piece of writing the thematic tie-up between the start of a piece and the end), the other major thing I learned from writing formal verse was to use a mental thesaurus, and not to be afraid to change the order of my words. I say a mental thesaurus, because a paper thesaurus can be too restrictive; wandering around the canyons of your mind can produce some interesting twists and turns that would never be explored using a printed page. Its all too easy to write bad ungrammatical verse: As on my bed I toss and turn Remembering things I tried to learn But relatively easy to recast these lines into something more grammatical and natural: Im lying wide-eyed in my bed While half-learned facts race round my head By forcing the grammar to be natural, I have also forced myself to think of different words and thereby avoid clichà ©s and hackneyed phrases. It works for prose too. Try to read your work out loud before you submit it. Does it work as a live reading? Does the language flow? Do the sentences hang together? Does the piece have thematic coherency? In other words, have you got rhythm? Hugh Ashton is a writer and journalist who has lived in Japan for the past 21 years. As a copywriter and rewriter of translated material, he has become increasingly pernickety and critical of his own writing and that of others. His latest published work is an alternate history novel, Beneath Gray Skies, which is available from Amazon, etc. Details of the book may be found at beneathgrayskies.com. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Writing Basics category, check our popular posts, or choose a related post below:50 Synonyms for â€Å"Leader†8 Types of Parenthetical PhrasesCapitalizing Titles of People and Groups

Mobile Application by

Mobile Application by Mobile Application by We are happy to announce the release of our mobile app for Android users. The mobile app is meant to make your user experience more convenient and effective. This app is essentially the tool that allows you to gain total control over the writing process. You are able to view all your orders, communicate with your writer staff, download or upload files and rate your completed papers. As you can see the app allows you to do essentially same things that customer control panel does with the only difference that you dont have to work from your computer a good old smartphone or tablet will do. After you install the app, you will need to log into it. There are two ways of authorization: you can either log in using your username password or you can use your facebook account. The latter method is the most convenient option because it does everything in just one click. For your information: we do not track facebook logins, do not store this information in any way, so rest assured your personal information will not be released to anyone else. Want to know more? Go here: Ordering Procedure and Its Staff Our Writers The History of Our Partners Once you log in, you will see that your mobile app is subdivided into three categories: current orders, completed orders all orders. These titles speak for themselves, so we will not explain them in great detail. You can see their status, order title order number. To view order details, touch the respective order. Once you enter this section, you will see your order details, including things like progress, type of order, a number of pages, academic subject, deadline and your writer ID. Use other sections (info, messages, review, rating) to navigate through the app and access the function you need. Thank you for downloading and installing the application on your smartphone. We hope you find this application useful and really enjoy it. We are happy to hear any feedback from you, please email our support team at support@

A Case Study On Kentucky Fried Chicken Marketing Essay

A Case Study On Kentucky Fried Chicken Marketing Essay KFC  Corporation, based  in  Louisville, Kentucky, is the world’s  most popular chicken restaurant chain.  It  primarily  sells  chicken  specializing in Original Recipe ®, Extra Crispy ®, Kentucky Grilled Chickenà ¢Ã¢â‚¬Å¾Ã‚ ¢ and Original Recipe Strips with home-style sides, Honey BBQ Wings, and freshly made chicken sandwiches.(www.kfc.com)  KFC  was founded  by Colonel Harland D. Sandersin  1964, KFC operates restaurants in 109 countries and territories around the world.  KFC operates more than 5,200 restaurants in the United States and more than 15,000 units around the world. KFC is KFC  is  part of Yum! Brands, Inc., the world’s largest restaurant company in terms of system restaurants, with more than 36,000 locations around the world. The company is currently ranked 239 according to Fortune 500 List, with an excess of $11 billion revenue in 2008.( http://www.kfc.com/about/)  PRODUCTS AND SERVICES KFC’s  main  prod uct is pressure-fried  pieces of chicken made with the original recipe.  The other chicken  offering, extra crispy,  is made  out of  garlic marinade and double dipping the  chicken in flour before deep frying in a  standard industrial kitchen  set  machine.   It also serves potato chips and wedges, coleslaw, zinger burger, depending on the  international  location.(www.wikepedia.com) MISSION STATEMENT To sell food in a fast, friendly  environment that appeals to pride conscious, health minded  consumers (www.KFC.com)  KEY SUCCESS FACTORS -Quality -Service -Cleanliness satisfying  the customers’ needs. COMPETITORS KFC competitors are pizza hut, macdonalds,and dominoes. MARKETINING ANALYSIS OF KFC SEGMENTATION Market Segmentaion is a  way  by which an  organization  or  firm  divides its target market into different homogenous groups in other to identify and meet the needs of its target customers..  They are four bases of market segmentation. KFC has divided its  market  into  distinct  groups of customers to meet their needs. Geographic Segmentation KFC has over 20,000 outlets all over the world and it segments its  market  geographically by regions KFC offers different  varieties  of  chicken  depending  on tastes in a certain country.  In north  India, chicken is their primary product while in the north, vegetable is  usually  preferred to  chicken.  KFC also segments its market based on  size  of the population.  In India, KFCs outlets  are found  in urbanized areas that are densely populated.  Geographic se For  instance  In north  India, chicken is their primary product while in the north, vegetable is  typically  preferred to  chicken. Demographic segmentation In demographic segmentation, the market  is divided  into  different groups based on age, sex, nationality, income etc KFCs segments its  market  according to Age(  7-60) Sex ( Both Males and Females) Income( for  high income  earners and  average  income  earners) Also, segmentation may be based on ethnicity; an example in China, some ethnic groups in China  prefer  hot and spicy food while others like it plain.  It is  therefore  necessary to meet the needs of these clients differently if one owns a chain of restaurants in those different regions. Physograpic segmentation Psychographic segmentation refers to the use of consumer lifestyles as a  basis  for classifying ones’ customers. Since different people have different interests and activities, then such an approach would be  feasible  in marketing. In this approach, companies may  classify  their  consumer  on the basis of their values.  In Psychographic Segmentation, segments  are divided  on the basis of social class,

Literature review chapter Essay Example | Topics and Well Written Essays - 250 words

Literature review chapter - Essay Example The development of private enterprises have shown growth over the last few decades, this expansion in the private sector is attributed to the benefits that privatization brings along (Dahel, 2001). The contribution of people towards Gross Domestic Product (GDP) generation is maximized through privatization. The margin of innovation becomes broader, and companies may define their policies according to their status.The freedom of decision making has been supportive towards the idea of privatization. Privatization seems to be an appropriate policy for increasing quality and variety in telecommunication industry. In 1992, the Kuwait Investment Authority began 3 phases plan of privatization. The aim of this initiative was to reconstruct the economy, and minimize the dependence on revenue generated by oil. The policy of privatization was devised in such a manner that it could entertain domestic as well as foreign investor. The five different methods that were employed by the Kuwait Investment Authority include Sale of Government Shares, General Tendering, Management Contracts, Lease Arrangement, and Cooperation with the Government. However, privatization is not a compulsion efficient provision of services(Doh, 2000). Heracleous (1999) studied the case of Singapore, and analyzed its public owned telecommunication sector that offers the quality of services according to the world standards. Further, Heracleous (1999) has dichotomized the debate of ownership, and its effects on the performance of an organization. The management team of an organization is authorized by the owners to manage the affairs, therefore, it does not matter who owns the company, as far as the administration of the organization is making the right decisions (Heracleous, 1999). Heracleous (1999) reveals important aspects of the privatization debate in the telecommunications industry. By discussing the unique and

Homework1 Essay Example | Topics and Well Written Essays - 500 words

Homework1 - Essay Example In addition, it has opened the country for more foreign investment despite local opposition. This move differs with the way the US government handles infrastructure in its country. The US government invested heavily in its local infrastructure making every part of the country available for trade (Sharma & Mukherji, 2013). c. The Indian government is trying to control the level of involvement of foreign investors in the local trade. This system tries to benefit the local people as the government works to their interest. On the other hand, the system has harmed foreign investors as they find it difficult to access the produce despite the amount of resources at their disposal (Sharma & Mukherji, 2013). d. Wal-Mart would be good for India because of its experience in procuring produce from the small farmers in upgrading a poor supply chain. It has shown success in many countries including Mexico, China, and Brazil (Sharma & Mukherji, 2013). a. There has been constant pressure that resulted to low price on Chinas products. Since the US does not pay an extra amount to cater for a clean production system, China producers do not include cleaning cost in their production (Spencer, 2007). b. With a high production cost, there would a high pricing on an item. However, with a market that requires low pricing on goods despite the cost of production, the company would lower its production cost to match the market price. Instead of spending to treat the wastes, the Chinese producers opt to releasing it in the rivers, reducing production cost (Spencer, 2007). a. Internet connection is expensive for some families who have to meet other needs. Despite this, rise in technology has taken root in education, being a disadvantage to those students without an internet connection (Troianovski,

On Schizophrenia and Beautiful Mind Movie Review

On Schizophrenia and Beautiful Mind - Movie Review Example One example of this destruction is that of the birth of his first child, he becomes so paranoid that he presents a real threat to his wife and the child. Eventually his marriage ends in divorce, but later, when he begins to come to terms with his illness, he and his wife are reunited. However, unlike, the 1950's, when Nash became ill, today, medical science has made it possible for this genetic illness to be controlled in some cases such as Nash's without medication. Two factors help to make this possible. The first is the fact that if the affected individual receives medical help early enough, including cognitive therapy, he or she has a better chance of overcoming the disease. The movie is truthful in showing how, after Nash's acceptance of his illness, he is able to recognize that the voices are not real and to quit letting them run his life. The second is the fact that has become evident to scientists that the disease of paranoid schizophrenia improves in latter life. This is even truer if the afflicted has been treated early on. In the respect of normalcy, the movie presents a distorted view of Nash's life regarding his compensation for the disease in maturity. While he did go on to achieve greatness as a mathematician, there are scientists who believe that this was not in spite of his illness, but because of it. Nash believed this himself as he stated in a radio broadcast in which he was interviewed. (1) (All things Considered) Otherwise, according to him, he may have accepted mediocrity-instead, in 1994 he was awarded the Nobel Prize! However, the movie did portray the world of schizophrenic hallucinations such as hearing voices and/or these voices appearing to talk back to the individual; voices talking out loud among themselves; hallucinations which cause the interruption in the person's thoughts result in scattered speech, and paranoid hallucinations causing false perceptions about other people, including perceptions that cause the afflicted to become violent or fear violence from others. The onslaught of paranoid schizophrenia normally begins between " the ages of 15 and 34 with a preoccupation with one or more systematized delusions or with frequent auditory hallucinations related to a single theme. In addition to suffering from hallucinations and the presence of voices, the person affected usually suffers delusions of grandeurThe main course of treatment for the disease is the use of medicines which arecommonly called 'atypical antipsychotic'Compared to the older convention' antipsychotic drugs such as Chlorpromazine (Thorzaine), fluphenazine (Prolixin), haloperidol (Haldo), thiothixene (Navane), and others, these drugs have fewer severe side effects. They are equally effective as the older drugs for helping reduce the positive symptoms like hallucinations and delusions, but may be better than the older medications at relieving the negative symptoms of the illness, such as withdrawal, thinking problems, and lack of energy. The atypical antipsychotic drugs include aripiprazole (Abilify), risperidone (Risperdal), clozapine (Clozanl), olanzapine (Zyprexa), quetiapine

Investigating the impact of Information Technology on a career Assignment - 1

Investigating the impact of Information Technology on a career - Assignment Example Owing to information technologies, advanced proficiency can be acquired by any tourism manager (Frew 138). Information technology transforms how business is carried out in the tourism industry. More particularly, marketing prospects are growing; modernization in customer service personalization and service technology takes place; and information on every tourist service is accessible virtually across the globe. Wireless communication technologies, data and text communication among guests, managers, and employees are currently being implemented by the hospitality industry (Yeoman & McMahon-Beattie 274). Consisting of expert systems and portable communication devices, these technologies enable tourism personnel to provide the finest customer service. Therefore, in order to remain competitive in the future and to meet tourism demands sustainably and securely there is no other alternative but to integrate IT and improve the interactivity with the customer base and the bigger market. Moreover, top management dedication and groundbreaking business process restructuring are needed with a long-term strategy planning throughout the organization (Lee 155). At present, information and choices are accessible on the Internet and customers can select the best from these choices to transact. This has lessened the needless haste of customers in travel

Comparing Two Shows Essay Example | Topics and Well Written Essays - 1000 words

Comparing Two Shows - Essay Example The show has had a very successful run, it is presently in its tenth season, this goes to show how popular the show has been thus far. â€Å"There are six main characters and each of them has their own traits. Almost all the characters have traits which would make them look funny, it is a sitcom and the characters must appear funny to be able to convince the audience.† (Television and Gender Roles) â€Å"Everybody love Raymond is another very popular TV show which has been very well liked and followed.† (Everybody loves lazy stereotyping of male roles)The concept of Gender roles must be noticed in this serial, Debra the wife of Raymond is always in the kitchen making food either for her husband or for her family, this goes to show that women are always in the kitchen spending their time cooking for their families. Marxist feminism also comes into play here, Karl Marx argues that women must be paid for domestic labor; this is what Marxist feminism is all about. Another v ery important thing which must be noticed in this show is that Debra is the one who always packs the lunch of her children; Raymond never bothers to do this. It goes to show how irresponsible at times men are towards their families. â€Å"The gender roles presented in these serials are presented very rightly after doing comprehensive research.† (Gender and Media Representation) Gilman called herself a humanist, she was deadly against exploitation of women, our society is still following the patriarchal ways and exploiting the women. She was not very comfortable accepting the theory of evolution laid down by Charles Darwin, the theory of evolution portrays man in the driving seat and gives less importance to women. Both the sexes are equally important and no favoritism of any sort can be done. She argued that women had to rely excessively on their sexual assets, they had to please their husband to ensure their survival, this is very true and beyond the pale. What a pity this r eally is. Grounded for life is another very popular TV show which is well liked by the audience. In one episode the husband decides to buy a car without even bothering to ask his wife, marriage is an institution and it is the right of the wife to be well informed about all the decisions made by her husband. This again reflects the reality; there are countless husbands who do not bother asking their better halves before making an important decision. Dad goes to work and Mom takes care of the household chores, it is unacceptable if a man packs lunch for his children, it is unacceptable if a man does the dishes. It is incorrect if a man asks his wife before making a big decision, buying a car is quite a big decision and a wife must know of this big decision before hand. Perkins Gilman was a very famous American sociologist who wanted to bring about change in the society, it is our duty to share the workload with women, and it is not a man’s world anymore. Women must be given res pect and their workload must be shared. It is very important to understand the responsibilities of living in a family, gender stenotypes must be abolished and we must awake to a new and a better world. Our society is becoming more and more men-oriented society, women have never been given enough respect and this is perhaps why so many marriages never workout. In a relationship both the partners have to make sacrifices and both should complement each other but this can only happen when there is perfect understanding and coordination between the pair of

Law & Ciminology, Victimisation Essay Example | Topics and Well Written Essays - 3500 words

Law & Ciminology, Victimisation - Essay Example imple words, no act can be considered a crime, irrespective of how immoral or damaging it may be, unless it has been made criminal by state legislation. This conceptualisation appears straightforward enough. However, it tells us very little about the processes through which certain harmful acts and victims usually come to be identified and recognised as part of the crime problem while others remain hidden. A critical approach to the study of crime and its impact on individuals and society hence requires a reflection on the exact definition of crime, construction of legal conceptions and its victims. Apparently, victims play a major role in initiating the criminal justice process. Without them, much of the work of the criminal justice process would come to a halt. Shapland (1986) asserts that â€Å"the numbers and types of cases entering the system and thereby eventually providing the workload for the courts, prison service and other conventional agencies, appear largely to be determined by the reporting behaviour of victims and witnesses, not action initiated by the police† (p. 210). The fact that only a fraction of crime is reported to and recorded by the police, combined with low clear-up rates, means that only a small proportion of offences ever reach the court. In all these cases, victim experiences can be prolonged and complex. An incident that occurred in perhaps a few minutes can become the subject of a series of inquiries that may last months or years after the event. Victims who come to court expecting that a trial will be an assertion of their wrongs can find that their probity is on trial as well. In Britain, the role of victims within the criminal justice process is mainly confined to reporting the crime and/or providing evidence. The significance of the victims role in these areas is compounded by the fact that the vast majority of offences come to police attention through a victims report rather than through patrolling activities.

Comparing Two Shows Essay Example | Topics and Well Written Essays - 1000 words

Comparing Two Shows - Essay Example The show has had a very successful run, it is presently in its tenth season, this goes to show how popular the show has been thus far. â€Å"There are six main characters and each of them has their own traits. Almost all the characters have traits which would make them look funny, it is a sitcom and the characters must appear funny to be able to convince the audience.† (Television and Gender Roles) â€Å"Everybody love Raymond is another very popular TV show which has been very well liked and followed.† (Everybody loves lazy stereotyping of male roles)The concept of Gender roles must be noticed in this serial, Debra the wife of Raymond is always in the kitchen making food either for her husband or for her family, this goes to show that women are always in the kitchen spending their time cooking for their families. Marxist feminism also comes into play here, Karl Marx argues that women must be paid for domestic labor; this is what Marxist feminism is all about. Another v ery important thing which must be noticed in this show is that Debra is the one who always packs the lunch of her children; Raymond never bothers to do this. It goes to show how irresponsible at times men are towards their families. â€Å"The gender roles presented in these serials are presented very rightly after doing comprehensive research.† (Gender and Media Representation) Gilman called herself a humanist, she was deadly against exploitation of women, our society is still following the patriarchal ways and exploiting the women. She was not very comfortable accepting the theory of evolution laid down by Charles Darwin, the theory of evolution portrays man in the driving seat and gives less importance to women. Both the sexes are equally important and no favoritism of any sort can be done. She argued that women had to rely excessively on their sexual assets, they had to please their husband to ensure their survival, this is very true and beyond the pale. What a pity this r eally is. Grounded for life is another very popular TV show which is well liked by the audience. In one episode the husband decides to buy a car without even bothering to ask his wife, marriage is an institution and it is the right of the wife to be well informed about all the decisions made by her husband. This again reflects the reality; there are countless husbands who do not bother asking their better halves before making an important decision. Dad goes to work and Mom takes care of the household chores, it is unacceptable if a man packs lunch for his children, it is unacceptable if a man does the dishes. It is incorrect if a man asks his wife before making a big decision, buying a car is quite a big decision and a wife must know of this big decision before hand. Perkins Gilman was a very famous American sociologist who wanted to bring about change in the society, it is our duty to share the workload with women, and it is not a man’s world anymore. Women must be given res pect and their workload must be shared. It is very important to understand the responsibilities of living in a family, gender stenotypes must be abolished and we must awake to a new and a better world. Our society is becoming more and more men-oriented society, women have never been given enough respect and this is perhaps why so many marriages never workout. In a relationship both the partners have to make sacrifices and both should complement each other but this can only happen when there is perfect understanding and coordination between the pair of

Miscommunications in the Workplace Essay Example for Free

Miscommunications in the Workplace Essay Recently we have had two of our retailers contact us with problems regarding shipments they have received or have failed to receive. I know this is not the first time this has happened but I would like to minimize the possibilities of it happening again. It seems the root of our problem is miscommunication in the workplace. As a shipping manager that has seen this kind of issue before in past work experiences and I believe I know what we can do to solve our breakdown in communication between the various departments, retailers, and co-workers. As CFO I know you will see this proposal can benefit the company both financially and operationally. First, I propose that the company implement a required form of communication. I believe hand written notes are a thing of the past and that we should upgrade our communication requirements to electronic mail. If we had an e-mail only policy we could have record of all communication on file without the risk of losing a post-it note. E-mail also includes the option of a read receipt, which allows the user to know when the receiver has opened and read the message or if they have not seen the message yet and another form of  communication, such as a phone call, might be required to meet a deadline. The policy might also include that all e-mails must receive a reply no matter how simple the message. I can head a short meeting at the end of the day to cover the implementation of this plan. The idea here is to eliminate hand written notes as well as informal communication such as instant messengers and social network communications. We will need to upgrade a few of the employees company cell phones and instruct them on how to use e-mail on these devices. Even though e-mails are good for keeping a history of communications, public relations expert Lisa Elias states, When delivering delicate information, pick up the phone. A gentle tone of voice can soften bad news or express warmth and caring, whereas an email or text can easily be misconstrued, (Kouremetis 2013). Although e-mail can help eliminate the outside forms of communication, another possible resolution would be to implement task management software into the office. This alone may solve the issue. There are many different task management programs available but one that has caught my eye is AtTask, which is used by corporations such as HBO, Samsung, and Adobe. AtTask will allow us to run a free trial of the software prior to purchasing and claims the product will allow us to see what is going on with our projects, if we are on time, and when it will be done (Services, 2012). You will even have access to the task manager to see what is going on in our shipping bay. AtTask even has an integrated communications technology that allows for instant messaging between co-workers and a notes system for the client list. That way, if one person speaks with a client of ours and they request a change to their order he can enter the message in the clients message folder and we can all receive the notification straight to our smart phones and computers. Even though, task management software will ultimately benefit company wide communication, another area that lacks focus is education on the subject matter of the workplace. A few of these men have worked here for over ten years and they know every part number by memory, but communication technology is outgrowing these few at a rapid pace. On the other end of the  spectrum, these younger men have keen senses of current technological advancements, but they could use some more time in learning the step-by-step processes we face on a daily basis. I propose that we run a workshop meeting once every two weeks for a total of eight weeks to teach the young ones about the process of shipping from us, the supplier, to the consumer/retailer. This workshop could possibly be run during hours if the time comes available, but will most likely need to take place on Saturday from 12:00 p.m. until 2:00 p.m. The instructors will be chosen from 3 of our most experienced workers who will earn overtime from these extra hours. A separate workshop on communication technology for the employees that have been here should happen once a week for an hour, probably on Wednesday evenings after work. The employees will be eligible for overtime with this extra hour on the job. I believe that being educated on the subject matter of the workplace is vital to our success. In addition to knowledge of the workplace being significant, another part of the communication process that has lacked in certain areas is feedback. Feedback is one of the four major communication functions (Belch 2012). It is the key to knowing your communication was successful. We need to emphasize in the training process that it is okay to ask questions. I have seen it happen before where someone is afraid to ask a question for fear of disapproval only to have to go back re-work what has been done. Asking the right questions can help us to do it right the first time (D.I.R.T.Fi.T.). I feel the previously mentioned workshops would be a great time to re-emphasize the importance of asking questions. Also, as mentioned in the first proposal, all e-mails must receive a reply or they will be followed up with a phone call. We must remember that sometimes in order to receive feedback it must be asked for. After explaining a work order or process it is vital to ask, Do you understand? or Do you have any questions for me? Another way of obtaining feedback would be through face-to-face technology. With our smartphones and office computers we can send a more personal message with FTF video conferencing. Google Hangouts are part of the Google suite of applications that support multi-party video chat as well as other Google applications including Sketch-UP, Docs, Spreadsheets, Presentations, and screen sharing and these types of technologies are being recommended as  teaching formats to doctors and professors around the globe (Roseth, 2013). In conclusion, I do believe there is work to be done in regards to the communication process in the workplace. I have proposed four strategies to minimize the possibility of future communication breakdowns. Please do not hesitate to contact me with any questions you may have. You may decide to choose one or to integrate all four, the choice is yours, but I do ask that you please take your time in considering the possibilities and I do trust you will choose what is best for the company. References Belch, G. E., Belch, M. A. (2012). Advertising and Promotion: An Integrated Marketing Communications Perspective, 9th Edition. New York, NY: McGraw-Hill/Irwin. Kouremetis, D. (2013). Choosing Communication Methods Wisely for Your Small Business. Forbes. Retrieved from http://www.forbes.com/sites/denakouremetis/2013/01/28/choosing-communication-methods-wisely-for-your-small-business/ Roseth, C. (2013). Blending Synchronous Face-to-face and Computer-Supported Cooperative Learning in a Hybrid Doctoral Seminar. Techtrends: Linking Research Practice To Improve Learning, 57(3), 54-59. Services. (2012). AtTask software services retrieved from http://www.attask.com/services

Laser ablation technique

Laser ablation technique First laser ablation technique was invented in 1960. The history of laser ablation studies begins with the birth of the laser itself. Laser ablation is a technique of removing of material from superficial solid with the help of laser beam. The number of studies grows simultaneously in seventies and they got a great success but it was explored in the year 1985 with many applications for example laser medication, laser with mass spectrometry, laser with optical emission spectrometry and a thin film growth. Laser ablation-optical emission spectrometry (LA-OES) and laser ablation-mass spectrometry (LA-MS) had been investigated for quantitative and qualitative analysis of solid material. After this invention scientist has taken 20 years to explore the combination of laser sampling with a specific source capable of multi-element analysis laser ablation inductively coupled plasma atomic emission spectrometry.3LA-ICP-OES/MS technique is a non-destructive quantification of large number of sam ples so elements with low detection limit. Applications of LA-ICP-OES/MS give a great contribution in many field like archaeological, geological, environmental, forensic investigation and semiconductor industrial fields. The primary goal of laser ablation technique is to quantify element.2 There are many different pulse laser uses in ablation process. First laser which is used to ablate solid material for chemical quantify is ruby. This was achieved by Maiman of the Hughes Research Laboratory using a ruby crystal as the active medium.1 Now days Nd:YAG laser have been widely used in analytical science because it require little maintenance, easy to handle, and relatively cheaper. Basically ablation is affected by laser wavelength; there is a simple principal behind this technique, shorter the laser wavelengths gives higher the ablation rate and lower the fractionation. For Nd:YAGlasers,the fundamental wavelength is in the near-IR at 1064 nm. Year of first report on the different laser types and wavelengths for micro-scale analysis with ICP-MS3 Year Laser Wavelength Pulse duration 1985 Ruby 694 Ns 1992 Nd:YAG 1064 Ns 1993 Nd:YAG 266 Ns 1995 ArF 193 Ns 1996 KrF 248 Ns 1997 Nd:YAG 532 Ns 1997 XeCl 308 Ns 1998 Nd:YAG 213 Ns 2002 Ti:Sapphire ≈800 Fs 2003 F2 157 Ns 2003 Nd:YAG 193 Ns 2003 Ti:Sapphire ≈260 Fs In past there were many techniques tried for the sample introduction such as spark ablation, electro thermal vaporisation, direct sample insertion and laser ablation began to be used with ICP-MS. Laser pulses is use for ablate of solid material and carriage of the released material to the ICP in a gas flow, mostly argon is a best alternative to the nebulisation of aqueous sample solution. In addition laser ablation has a great advantage over other technique like reduce sample preparation; reduce spectral interference and rapid sample exchange.4 if we talk about the evolution of LA-ICP-MS in last few years many scientists work on a different field like geological applications of LA-ICP-MS, biological applications, metal, polymer, glass applications and they got a huge success. As we know that ruby was a first laser to ablate solid for introduction to ICP-MS. The main feature of ruby laser is ruby, flash tube, and elliptical reflector and trigger wire. Generally, crystal surface of one end is highly polished and silvered and the other end is partially polished. Ruby consists of aluminium oxide, Al2O3, to which has been added a small proportion (about 0.05% by mass) of Cr2O3. The ruby laser is totally based on the energy level principle. When chromium ion is excited from the ground level, this process is known as optical pumping. This is produced by an intense flash of white light from the flash tube and transition may occur. Spontaneous transitions produce photons, which trigger further emission. Photon travel perpendicular to the one end of the rod accumulates and release form the other end of the ruby rod which is partially silver polished. REMAINING Nd:YAG is widely uses in advance analytical practicals. Basically its work on different energy levels like ground level, meta stable level and pumping levels. In this system lasing occurs between the metastable levels. As the terminal level is essentially empty at room temperature, the population of E1 can be increased by a relatively small pump power above that of the E3 level. This is a significant advantage over the ruby system4. There is few influence of physical and chemical property of sample occurs because of aerosol particles generated by nanosecond laser ablation at 213 nm. The main problem of LA-ICP-MS is calibration strategy for a specific quantitative analysis. Different material have different matrix and when laser is introduce for ablation it may produce matrix â€Å"effect†. Matrix effect cause changes in volume and composition of the generated particles during thelaserbeam interaction with the different sample surfaces. To solve this problem we need to calibrat e the matrix match5. Principal of laser ablation A typical laser ablation system consists of laser, ablation process and detection system. Usually in this type of practical we use pulsed lasers. Argon or other inert gases typically carry the ablated sample into the ICP. Thermal and non- Thermal mechanism is involved in the ablation process but its depending on the wavelength of the laser. Test sample absorbed the laser light (thermal process) and transfer this energy into atomic lattice. Then outer layer of the sample breakdown and melting and vaporisation process may occur. Different chemical required different latent heat of vaporisation, researchers says that if the level of photon energy is more than the bounding energy between two atoms in a solid sample. The electromagnetic laser radiation breaks the atomic lattices and ejects ion and atoms without producing any heat.8 The following are the basic principle of laser ablation.6 Solid sample of a specific size is set up in a special design laser ablation chamber. Optical lens can be used for the investigation of solid specimen surface and select region to be analysed. The parallel radiation of solid state laser, gas laser or excimer laser with specific energy and time duration. Then introduce laser light directly onto the small region of sample with the help of optical lens. Ablated sample material range from nanogram to milligram produced by one or more laser shots consist of vaporised ions, small solid particles, solidified liquid droplets, free atoms and few clusters. If the vapours contain significant population of excited or ionized atoms, direct LA-AES and LA-MS for element analysis is possible. We can introduce ablated material in ICP as an aerosol by the flow of carrier gas; generally we use argon gas as a carrier. In second step ablated material is completely atomized, excited and ionised. The radiation of the atomic emission or the masses of isotopes species can be recorded with the help of different kind of detectors in spectrometers of LA-ICP-MS and LA-ICP-OES6. Principal of laser action remain.diagram An ideal solid sampling method should include the following features.6 Handle small and large sample size. Accurate measurement. Simple operation. Reproducible sampling. Simultaneous multi element analysis. Applicable to wide range of sample composition. Wide dynamic range. Variability from micro analysis to macro analysis. Acceptable cost of instrument and maintenance. Suitable method for quantification. Ablation stage.2 As we know the main feature of laser ablation lens, ablation chamber, and adjustable platform. Lens is fixed into optical microscope so that optical and visual focusing coincides and sample surface can be seen by CCD camera. Analytical sample is placed in a chamber which is made up of fused silica window. The adjustable chamber directly connected with computer and controls the position of sample in x, y, z directions. Few micron of displacement is achieved by this technique without any hindrance. Depending on the timing between individual laser pulses and platform movement, different tasks such as depth profiling, spatial profiling, surface and bulk analyzes are possible. If we applies laser ablation with inductive couple plasma, it require inert gas to transport the ablate sample to ICP. Argon and helium is widely use as a carrier gas. These gases provide better transportation and ablation rate. To improve transport efficiency, the sample or chamber is placed directly under the ICP torch. Detection system.2 ICP-MS Quadrupole mass analysers are used in inductive couple plasma mass spectrometry. However, time of flight, double focusing electro static- magnetic sector, multiple faraday Analogue detector instruments, ion trap mass analyser have been used with ICP-MS. Quadrupole mass analyser has a ability to scan between two different masses. We can measure 1000 masses in only one second. There is one disadvantage of using quadrupole mass analysers, if ablated vapour contains large particles so, it may produce some spatial changes such as enhancements or depressions in the signal level and chemistry. Double focusing electrostatic-magnetic sector instruments produce high resolution and very low background levels. For isotopes ratio applications usually we can use multiple faraday analogue detectors because its give a very high precision and time of flight instruments are better suited for laser ablation sampling ICP-MS. This system is able to remove the specific errors due to large particles in ICP.2 Ablation cells ref 3 Direct solid micro-analysis using Laser ablation Inductive couple plasma mass spectrometry has been used in many applications such as forensic, art, geo-sciences, material science, bio- science and cultural heritage. During the LA-ICP-MS measurement ablation cell plays an important role because it allows a quantitative transport aerosol and lead to a rapid transport from the ablation site to the ICP source. The guiding criteria were maximization of both aerosol extraction efficiency and transport speed. Usually there are two type of ablation cell is use in ablation system, open cell and a closed cell. The first open cell was invented in the year 1970 for flame atomic absorption spectrometry or microwave discharges. The cell size was a compromise between signal dispersion and minimization of aerosol spattering on the walls (so-called wall reaction), which is enhanced in reduced size cells. Dittrich and Wennrich first introduced fully enclosed ablation cell chamber. This system has many advantages like no sample preparation is required for ablation such as surface polishing, and at atmospheric pressure that permitted the direct analysis of pressed pellets, clearly unstable under vacuum conditions.ref 3 Sample prepration Calibration strategy There is no universal method of calibration for all of solid-sample types. There are three general groups of calibration strategies Calibration can then be achieved by comparing the response for the internal standard element in a reference material and the unknown.ref 5 Matrix-matched direct solid ablation ref 1 Matrix match is very popular technique for LA-ICP-MS. Matrix matching is necessary because the ablation rate varies with the sample matrix. Matrix matched standard consist of mixture of an appropriate matrix material with the analyte. Dual introduction (sample-standard) This method does not require the reference standards to be introduced by laser ablation.In this technique we use two sample introduction channels. One channel is for ablated material and another for nebulizer aqueous solution standards. Usually this method is used for semi-quantitative analysis with LA-ICP-MS. Direct liquid ablation Gunther et al. First demonstrate direct liquid ablation technique for LA- ICP-MS. Na (all elements) and Yb (rare earth elements only) were used as internal standards. To explain the similar ablation behaviour of liquids and solids, particle size distributions were measured and the contribution to the total ablation volume was calculated.ref 1 Sample introduction for LA-ICP-OES/MS ref 4 In many fields like clinical analysis, forensic, and biological the volume of sample available can be lower than 1 millilitre. The low sample consumption systems improve the analyte transport efficiencies afforded by conventional setups, some time solvent system may cause may type of interferences. It can be reduced by working at very low very low liquid flow rates. It can be observed that, in some cases, the sample volume is below 100ÃŽ ¼l. Usually, when liquid sample is analyse with the help of inductive couple plasma mass spectrometry or optical emission spectrometry. Nebulizers is use to transform liquid solution into an aerosol. A typically nebulizer deliver the solution with a specific rate on the order of 0.5-2ml/min. There are many different type of nebulizer is available such as, micro nebulizer, high efficiency nebulizer, micro concentric nebulizer, micro mist nebulizer, sonic spray nebulizer etc. Basic reason to use a nebulizer is to generate aerosol. Micro nebulizer is ve ry popular used in ICP-OES/MS. A micro nebulizer is used to generate stable aerosols at liquid flow rates below 100-200ÃŽ ¼l/min. Aerosol generation. Micro nebulizer provides finer aerosols, higher ICP sensitivities and lower limits of detection low liquid flow rates. A typical concentric nebulizer has lower capillary inner diameters and wall thickness than conventional ones. For conventional pneumatic nebulizers, the dimensions of liquid capillaries or the wall thickness and inner diameter are not appropriate for the generation of fine aerosols at low flow rates. It has been claimed that it is difficult to generate stable aerosols with conventional nebulizers at liquid flow rates below 300ÃŽ ¼l/min. In transport of liquid, if the flow rate is below then 100ÃŽ ¼l/min. So, solvent evaporation is enhanced and, on the other hand, droplet coalescence is dampened in the former situation. Solvent evaporation and aerosol characteristics at low liquid flow rate can be evaluated by this equation: D3 = d30 Et Where d is the drop diameter at a given time t, d0 is the initial drop diameter and E is the so-called evaporation factor. There are many different devices used for the introduction of liquid micro samples in ICP techniques. It can be classified into three different groups. A nebulizer coupled to a spray chamber; A nebulizer coupled to a desolvation system; A direct injection nebulizer. Micro nebulizers coupled to spray chambers: Usually in the analysis of micro samples, pneumatic concentric micro nebulizers are widely used with ICP-MS as well as ICP-OES/AES. High efficiency nebulizer {HEN}: First high efficiency nebulizer was invented in the year 1992. HEN is totally made up of glass. Its design is similar to a Meinhard ® but the critical dimension is less than the other one. It has many advantages like because of the reduced inner diameter of the capillary, even clean aqueous solutions must be filtered to avoid tip blockage caused by the presence of fibres or small particles. And due to the low cross section area of the gas exit, pressure of the gas is rather high. Micro concentric nebulizer (MCN) The micro concentric nebulizer can be easily introduced with double pass or cyclonic spray chambers by means of special end caps. MCN consist of polyamide narrow capillary and a t-shaped plastic body. The cross section area of the gas exit is very less. This gives a huge drawback because the aerosol is generated at the exit of the nebulizer where the gas stream has lost a fraction of its kinetic energy. MCN can be considered as a rather fragile nebulizer. This type of nebulizer is very popular in the application of inductive couple mass spectrometry and optical emission spectrometry because it provides great sensitivities than conventional pneumatic nebulizers. Micro mist nebulizer (MMN): The MMN is a modified glass conventional concentric nebulizer. Micro mist nebulizer has an ability to recess the liquid capillary with respect to the nebulizer tip. This important feature allows to working with high salt content solutions without suffering from nebulizer tip blockage. PFA micro nebulizer (PFAN): The PFA (tetrafluoroethylene-per-fluoroalkyl vinyl ether copolymer) micro nebulizer is an HF resistant. Basically this nebulizer is used for the analysis of samples containing high concentrations of organic solvents and dissolved solids. The PFA nebulizer has been extensively used under free aspiration mode. Usually this nebulizer is used for the analysis for extremely diluted samples without contamination from pump tubing and, at the same time, reduces the signal noise. Multi micro spray nebulizer (MMSN): The Multi micro spray nebulizer (MMSN) enhances the interaction efficiency between the gas and liquid streams. This is a modified version of the SSN. In this system the sample solution is divided into 3 parts, each one of the three capillaries employed is centred with three respective gas exit orifices and it has three aerosol generation points like three micro nebulizers. Thats why is called as multi micro spray nebulizer. Figures of merit demerit of LA-ICP-OES and LA-ICP-MS ref 8 The figures of merit are depending on the operating condition, instrumentation and applications of laser ablation inductive couple plasma mass spectrometry. The best advantage of LA-ICP-MS is sensitivity, detection efficiency, direct sampling multi element quantification at the surface and bulk for elemental composition of solids, Reduced risks of analyte loss or cross-contaminations, Determination of spatial distribution of elemental compositions, Independent of sample geometry, No chemical procedures and Analysis of very small samples.ref 8 The disadvantage of this technique is very less. Some time the common matrix and molecular species can interact with the active analyte or some double charged molecular species create difficulty in quantification. Applications of ICP-OES/MS 1) Recent applications on isotope ratio measurements by LA-ICP-MS (ref 9) LA-ICP-MS is a powerful and sensitive technique for analysing stable and radioactive isotopes in different application fields because of their low good accuracy, detection limits and precision. ICP-MS can be use for isotope ratio measurements of Mg, Ca and K in plants, soils and nutrient solutions. Serious difficulties were encountered during the analysis of K and Ca isotope by ICP-MS. The problem is rise because of the interferences. 2) LA-ICP-MS on biological samples and single particles (ref 9) New trend focus on isotope dilution technique together with neon flow injections. Today, LA-ICP-MS is very popular method for determination of metals, for example on protein bands in gels after the gel electrophoresis of protein mixtures. In future LA-ICP-MS could be able to improve in the resolution of sub-micrometer range for isotope ratio measurements in biological and medical samples. 3) LA-ICP-MS for the elemental analysis of bone and teeth samples for discrimination purposes ( ref 10) Human bone and teeth is useful evidence when found in crime scenes because it consists of isotopic property. Usually LA-ICP-SF-MS method is applied for analysis of bone and teeth. In this method non-matrix calibration is required and its only required micro gram of sample for analysis. This is a fast and easy elemental analysis technique using LA-ICP-SF-MS for the intra-inter human discrimination of skeletal remains. 4) LA-ICP-MS for surface analysis (ref 6 ) LA-ICP-MS is also used for the determination of lateral element distribution has also been described for ceramic layers and for profiling of metal layers. With the help of this technique we can measure the size of Al2O3, MgO and complex CaO, MgO and Al2O3. 5) Environmental applications and Geological applications (ref 1) LA-ICP-MS has a excellent capacity to determined chemical content present in tree samples because of the high spatial resolution provided by a focused laser beam. The excellent sensitivity of LA-ICP-MS allows measurements of very low detection limit and multiple quantitative analyses. Geochronology is one of the basic principles in earth sciences. Age can be determined by measuring the 206Pb/238U, 207Pb/235U, and 207Pb/206Pb ratios. LA-ICP-MS has the ability to do spatially resolved in-situ determination of U_Pb isotopic compositions in zircons. 6) The emerging role of ICP-MS in proteomic analysis {ref 11} ICP-MS stands now as a new tool in the field of quantitative proteomics. The system to be analysed may be very small e.g. a single cell, with 0.5 pL volume and ca. 50 pg total protein content. The below diagram describe the emerging role of mass spectroscopy. Recent trends and developments in laser ablation-ICP-mass spectrometry Now, laser technology is not a new thing in any field. Laser is widely used in different programs such as for medical applications, for micro-machining, in CD-players, light shows and in analytical chemistry. As we know that laser is used for direct analysis of the elemental composition of solids, mostly solid state lasers, such as Nd:YAG laser with at 1064 nm wavelength is very popular in the determination of many things. But the trend moves towards the shorter wavelengths 1064 nm to 157 nm. In laser ablation set up we can use excimer lasers with different wavelength like XeCl 308 nm, KrF 248 nm, ArF 193 nm, and F2 157 nm. Laser ablation inductive couple plasma is one of the flexible and powerful technique in analytical field for isotope ratio measurement and direct determination of solids. A variety of calibration techniques have been developed and successfully applied to LA-ICP-MS. There is a great development with respect to calibration strategies. Intensively study is going on t he matrix-independent calibration procedures using external reference materials and/or internal standardization. Ref 12 Determination of boron in silicon wafers with the help of on-line isotope dilution laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) method. This is a new and successful method. In this technique ablated aerosol sample was mixed on-line with enriched boron and conventional nebulizer system is used for continuous supply. By the mixing of two different aerosols, isotope ratio of boron has been changed and it is recorded by ICP-MS system. In this system accurately quantifies boron concentrations in silicon wafers without the need for an internal or external solid reference standard material. On-line solution-based isotope dilution in laser ablation ICP-MS is an accurate, simple, precise and quantification procedure. Below the process diagram of on-line isotope dilution LA-ICP-MS There is a still study and research on the new calibration method combine with IDA and LA-ICP-MS without using standard reference materials. In future we will focus on the applicability of this on-line LA-ICP-IDMS quantification concept to the determination of trace analytes in various other matrices.ref 13 Refrence. (http://www.rsc.org/delivery/_ArticleLinking/DisplayArticleForFree.cfm?doi=a901765hJournalCode=JA Laser ablation in analytical chemistry—a review Science direct. Solid sample analysis using laser ablation inductively coupled plasma mass spectrometry TrAC Trends in Analytical Chemistry Volume 24, Issue 3, March 2005, Pages 255-265Trace-metal analysis http://www.rsc.org/delivery/_ArticleLinking/DisplayArticleForFree.cfm?doi=b202988j Spectrochimica Acta Part B: Atomic Spectroscopy Volume 65, Issue 1, January 2010, Pages 51-60 Influence of physical properties and chemical composition of sample on formation of aerosol particles generated by nanosecondlaser ablationat 213nm First Laser ablation principle and application Google book. Laser in analytical atomic spectrometry google book. http://www.rsc.org/delivery/_ArticleLinking/DisplayArticleForFree.cfm?doi=a901765hJournalCode=JA Laser ablation in analytical chemistry—a review science direct