Communicating laboratory procedures Essay Example for Free

Communicating laboratory procedures Essay Laboratory procedures and practices must be communicated in a laboratory, because to keep the risk as minimum as possible by storing the chemical products in an appropriate and safe manner. A staff member shall be responsible for all stored chemicals and their use. All products must be labelled so that the researcher can identify and communicate the identity of the sample for laboratory staff. Unidentified chemical should be treated as infectious and disposed of in a proper way. All chemicals should be stored in suitable containment appropriate to hazard the agent. Containers used for storage must be enclosed or sealed. Accurate inventory should be maintained for the purpose of assessing risk and reducing unnecessary handling. Inventory must be updated to a minimum, annually. Each chemical container must also be labelled with the name or code of the chemical, the name and contact information of the user. This information must be legible to the environment is stored, i. e. indelible. A laboratory to reduce the risk good sanitation is essential to protect the integrity and chemicals. Cleaning routine should be invoked to provide work areas free from significant sources of contamination. It should be clean-up actions based on the higher degree of risk to the safety of individuals and the pilot may be exposed. Laboratory staffs are responsible for cleaning the seats in laboratories and equipment and areas that require specialised technical knowledge. Some laboratory cleaning connects: Â  Keeping laboratory clean and uncluttered surfaces must be clean and free of chemicals commonly used, glassware and instruments. Way to washbasin, eyewash areas, emergency showers and exits, and fire suffocations must not be blocked. Â  The proper clearance of chemicals and excess Old should not be used and the clearance of chemicals promptly and correctly. Â  Arranging a workplace which is free of physical hazards corridors and passageways must be free of subsiding hazards. Concentration must be given to electrical safety, particularly as it reveals to the use of extension cords, appropriate grounding of instrument and deterrence of the production of electrical hazards in wet areas. All laboratory instruments needs to be cleaned and verified of being free of hazards before being issued for correction or assistance. (Safetyfirstaid, 2009) All protective equipment must be cleaned, laundered and disposed of by the member of staff. Apparel contaminated with human blood or other potentially infectious materials should be handled as little as possible and needs to be collected in special boxes, labelled or colour coded. Laundry will be cleaned according to the specific laboratory operating procedures laundry facility. Appropriate protective equipment must be worn by member of staff who handles contaminated laundry. The inflammable hazard is evident when gases such as hydrogen, methane, and acetylene are acknowledged. However, the fire hazard can be appended greatly. Staff must avoid the dangers of fire risk, high-pressure gas. A very brief contact with liquids or materials at low temperatures can cause burns similar to burns from high temperature contacts. The eyes are particularly vulnerable to this type of exposure, so safety glasses are required. Suppliers of care of health are invited to subject an agreed whole of data for each audit. The data are contained in an environment very blocked, are analysed and adjusted the risk and are applied, with recommendations for the improvement. Feedback is via the annual reports available to the patients, the clinicians, the combined professionals of health, the information management and the personnel. The data gathered are replaced year-on-year to confirm progress and tend. Most audit checks also provide fast, secure, online information allows contributors to see from their own computer how their organisation is performing against agreed standards at national level if available and in comparison with other trusts and networks. Although several audits have been in operation for a short period of time, other more established checks already leading to improvements in direct patient care. For example, the audit of heart attack led to improvements in treatment following a stroke and more patients taking drugs that are effective when they are discharged. (NHS, 2009) All in all communicating laboratory procedures is important because laboratories are inherently fairly dangerous places, e. g. Physics laboratories often have high voltage electricity or ionising radiation, Chemistry laboratories have dangerous chemicals and Biology laboratories have biological hazards such as microorganisms that can cause diseases. The risk in a particular laboratory depends almost entirely on what happens to it. It is only through careful assessment by a qualified and experienced and then they identify risks establishing and following safe working practices in a laboratory can be done in a reasonably safe place to work. Audits are introduced to measure the quality of patient care and improvements over time. Security measures may include things such as training of personnel, exhaust systems, natural obstacles, and alternative less hazardous chemicals that achieve the same result. Nmsu, 2008. http://www. nmsu. edu/safety/images/signs/symbol2d. jpg Safetyfirstaid, 2009. http://www. safetyfirstaid. co. uk/images/catalogue/product/SG0088-L. jpg Weird, 2009. http://www. weird. fr/images/logo_405x401_hazard_highly_flammable. jpg NHS, 2009. http://www. ic. nhs. uk/statistics-and-data-collections/audits-and-performance/national-clinical-audits.

Women in the Civil War Essay Example for Free

Women in the Civil War Essay During the civil war, the contributions made by women both in the north and the south, though somewhat unheralded, were nonetheless significant. In fact many women were not contented with merely supporting the war efforts from the home front. Hundreds of them were actually with their armies in the battlefronts. Many were serving as field nurses while others were general purpose aides. When the soldiers had to march for days, they, too, marched with them, living in camps and eating army rations. They also endured the heat, rain, mud, and snow borne by the soldiers, protected by the same ineffective shelter and insufficient clothing. As bullets flew and cannons roared, some of these women were actually in the battlefields playing the role of â€Å"medics. † They were often caught in the crossfire, rushing to help wounded soldiers, equally endangering their lives in the process. (Hall, n. d. ) Stories had been going around about some of these women. One nurse was mentioned – Augusta Foster who came from Maine. She fell off her horse when it was shot, missing her by inches. That near miss, however, did not scare her. She went on with her duties as if nothing had happened. One of the most talked about nurses was Anna Etheridge, who was a mere â€Å"Daughter of the Regiment† in Washington, D. C. when the war started in April 1861. (A â€Å"Daughter of the Regiment† was only supposed to inspire soldiers going to war. Dressed in fancy uniform complete with decorative feathers and a bonnet, she would be with other women like her, leading the parades which presented and paid tribute to the soldiers before they were sent off to the battlefronts). When the war started getting really bloody and news of hundreds of soldiers getting wounded and killed started filtering back to Washington, D. C. , Anna was one of the many members of the â€Å"Daughter of the Regiment† who made themselves scarce. They decided to actually â€Å"go to the front† and do their share. â€Å"Gentle Annie,† as she came to be known, marched from Michigan with the 2nd Infantry â€Å"and was under fire on several occasions. † Her efforts were recognized in 1864 with the Kearny Cross, an award given for gallantry in action. The Confederacy had their share of courageous nurses. Lucy Ann Cox was one of them. Lucy started out as a â€Å"vivandiere† (a woman who goes with the army simply to sell things to soldiers). She, however, later became a field nurse for Company A of the Confederate Army’s 13th Virginia Infantry which fell under the command of General Lee, where her husband belonged. She marched with the group during the two times that Lee invaded the North. She was conferred full military honors when she was buried after the war. (Hall, n. d. ) Another interesting woman in the Confederacy was Mrs. Juliet Opie Hopkins from Alabama. According to information picked up from a scrapbook prepared by a certain Captain J. C. Featherston and included in the papers of the Irvine, Saunders, Davis, and Watts families, when the war started Mrs. Hopkins sold her properties in â€Å"New York, Virginia, and Alabama† and donated the proceeds to the Confederacy for the purpose of setting up hospitals for their soldiers. Afterwards, she volunteered to act as the chief matron in the hospital in Richmond. Accounts had it that she, herself, even suffered gunshot wounds two times when she personally went to the battlefield. She was christened â€Å"Florence Nightingale of the South† for her efforts and her picture appeared on the currency of the Confederate government printed in Alabama. (As cited in Hearts at Home: War Work, n. d. ) Working with the wounded in hospitals was one of the ways where women demonstrated their patriotism. They did their best to keep the morale of their soldiers alive not only through their nursing work but also by holding all sorts of events such as dinners where they would entertain the wounded. (From the diary of Louisa H. A. Minor, as cited in Hearts at Home: War Work, n. d. ) However, although they were working at the home front, their work was not without dangers. Take for instance the report printed in the March 14, 1864 issue of the Daily Richmond Examiner about a March 13, 1863 mysterious explosion in a laboratory in Brown’s Island. That incident left 35 women killed and 31 injured. Many of the victims were reported to have been burned â€Å"beyond recognition. † (Hearts at Home: War Work, n. d. ) Some of the women in the North as well as in the South helped with the war efforts in the home fronts knitting socks for their soldiers, fabricating bandages for their wounded, sewing shirts, and attending to some other supplies needed in the battlefronts. Some even manufactured small arms and the ammunition that went with them. In Fayetteville, an arsenal managed by women was able to turn out about â€Å"900,000 rounds of small arms munitions in 1864† before it was destroyed. Organizations like the â€Å"Sick Soldier’s Relief Society and the Soldier’s Aid Society† were organized by women to offer any help they could. (Women of the American Civil War, n. d. )

Global System for Mobile Communications (GSM) Technology

Global System for Mobile Communications (GSM) Technology Investigation on the physical layer technologies employed in the GSM System Absyarie Syafiq Bin Shahrin Abstract Basically in this paper, we intend to give a rundown on GSM (Global System for Mobile Communications) specifically on the technologies employed at the physical layer in the GSM system. The GSM system is a very interesting topic as it revolutionized the way we communicate and it is still being used till this day. It is actually the 2nd Generation (2G) wireless system as it uses digital instead of analog and it also deploys Time Division Multiple Access (TDMA) that is implemented on multiple frequency subbands. Frequency Division Multiple Access (FDMA). GMSK modulation and demodulation technique will also be discussed together with how it works and what their advantages/disadvantages are. The problems with ISI (Intersymbol Interference) in GSM systems will also be addressed together with how to mitigate ISI using channel equalization. With that, we will also give a simple explanation on how speech coding is accomplished in GSM transceivers. Keywords: Gaussian Pulse, GMSK, ISI, channel equalizer, ISI equalizer, speech coding I. Introduction GSM is a standard developed by the ETSI (Europe Telecommunication Standards Institute) to describe the protocols of the 2nd Generation (2G) communication technology used by mobile networks and cell phones. It was first launched in Finland with a data speed of up to 64kbps. The GSM is given the term 2G because it is something completely new compared to the first generation (1G) with the usage of digital signal signals instead of analog. It was designed from scratch with no backward compatibility with the previous 1G technology. Using 124 channels per cell, it can accommodate up to 8 users by using a combination of TDMA and FDD scheme [1], though some of its channels are used for control signals. It also introduces the SIM (Subscriber identity module) card which allows for roaming calls. At first, it was only designed for operation in the 900 MHz band but later it was adapted for 1800Mhz. GSM is a very popular standard used today with over 90% market share, with availability in over 21 9 countries and territories worldwide. Originally the GSM was developed with the intention that it will replace the first generation analog networks by having digital, circuit-switched networks which are optimized for full-duplex voice telephony. However as time passes, the GSM system was further developed to include data communications by firstly having it on circuit-switched transport, and then changing it later to packet-switched transport via GPRS ( General Packet Radio Service) and EDGE ( Enhanced Data Rates for GSM Evolution) . In GSM, Gaussian pulse shaping is used and Gaussian Minimum Shift Keying (GMSK) as a modulation/demodulation technique with a modulation index of 0.5 [2]. This modulation method however gives rise to inter symbol interference. Inter Symbol Interference (ISI) in the GSM system are usually caused by two factors; Multipath propagation and Bandlimited channels. An ISI equalizer is used to solve this problem by implementing the Maximum Likelihood Sequence Estimation (MLSE) via vertibri algorithm. To make things easier to understand, Figure 1 is attached to relate how the GSM system can relate to the OSI (Open System Interconnection) model. We will however, focus more on the Physical Layer of the GSM system. Figure 1: How the GSM is realized in the famous OSI model [7]. Pulse Shaping In digital telecommunications systems, we strive to achieve broad spread spectrum with significant low-frequency content. This in return, requires a lowpass channel that has a bandwidth sufficient enough to accommodate the essential frequency content in the data stream. Gaussian function fits this requirement perfectly. The speciality of this waveshape is that, the pulses rise and small smoothly until it settles to a value [14]. This is a valuable asset as it gives a solution to problems such as precursors, overshoot and ringing in a pulse signal [14]. This problems cause uncertainty to the actual value so it is very troublesome. Besides that, it also addresses the two required needs of communication systems which are band-limited channels and reduced Inter-symbol interference (ISI) by applying a Gaussian filter symbol-by-symbol. It is nearly impossible to get the perfect sinc spectrum in the time domain as the bandwidth needs to be infinity. We can only have an approximation or near the same sinc spectrum. ISI can also still happen if control is not exercised over the pulse shaping. Figure 2: An impulse response of a Gaussian Filter [15] In GSM, we apply Gaussian filtering for Gaussian Filtering Minimum Shift keying (GMSK) a modulation technique. Basically it is similar as the Minimum Shift Keying (MSK) but the data stream must first go through pulse shaping via Gaussian filter before being applied to the modulator. MSK is already a good modulation scheme as it possess constant envelope and maintains phase continuity. GMSK allows for reduced sideband power which results in the reducing of out-of-band interference between the signal carriers in adjacent frequency channels. The GMSK technique has an advantage of being able to carry data while still maintaining an efficient usage of spectrum. The reduce power in the GMSK is very useful especially for mobile phones as lower battery consumption is needed for operation [16]. The drawback of GMSK is that, it requires more modulation memory in the system and causes ISI. We have two ways to generate GMSK modulation. The most basic way is to apply Gaussian filter on the input signal and then apply a frequency modulator with a modulation index of 0.5 [2] [16]. The problem with this method is that it must have an exact modulation index of 0.5. In the real world, this is impossible as component tolerance drift can vary[16]. Figure: Flow chart of GMSK modulation using a Gaussian filter and Voltage controlled oscillator The second method is more realistic and widely used. This GMSK method uses the Quadrature (I-Q) modulator. The operation starts by having the Gaussian filtered data separated into two parts, in-phase I and quadrature phase (Q). The I and Q components will then be mixed up to the frequency of the RF carrier to have a modulated RF signal. This kind of modulator can maintain 0.5 modulation index without having any modifications. The performance of this quadruple modulation depends on the accurate creation of I and Q components. For demodulation, this scheme can be used in reverse [16]. X – mixer or multiplier LO – Local oscillator Figure 3: Block diagram of I-Q modulator Inter symbol interference and channel equalization ISI in the GSM system is mainly caused by multipath propagation. Multipath propagation is a result when signals arrive at different times (delay) because it is does not travel in line of sight (LOS). In reality, connection will never be in LOS all the time so the signals will go through different paths by being reflected or refracted from different objects to reach the destination. When the signals travel through multiple paths, they will arrive at different times depending on the route they used. It is also possible for reflected signals to overlap with the subsequent signals [13]. This in addition, results in distortion to the received signals because all the signals have different delay. This situation happens either from mobile station to base station or vice versa. Since the delay spread is more than the symbol time, frequency selective fading occurs. Figure 4: An example of multipath propagation Figure 5: ISI as a result of multipath distortion [13] To combat the problem with multipath propagation, we use and ISI equalizer. This equalization technique is based on the MLSE which uses the Viterbi Algorithm [3] [10]. Figure below shows the block diagram of the ISI equalizer. Figure 6: Block diagram on how ISI equalizer is used in GSM environment When the base station or the mobile station transmits a TDMA burst, not all of is user data. Instead, 26 bits are allocated for the training sequence and they are known by their receivers (either mobile station or base station). Each of the known sequence bits unique for a certain transmitter is unique for a certain transmitter and this sequence bits is also repeated in every transmission burst. The figure below shows the normal burst structure in the GSM burst. Figure 7: GSM Normal Burst Structure A channel estimator is needed because to perform MLSE, we require information on the CIR (Channel Impulse Response). The channel estimator will estimate the CIR for each of the bursts by comparing the transmitted bits with the received signal to produce he(t) [10]. Channel estimation in GSM uses Linear MMSE (Minimum mean square error) [11]. Since the match filter is in time domain, r(t) will be convoluted with the signal obtained from the channel estimation, he(t) to create a model signal Y(t). The output model signal obtained can then be used to estimate the transmitted bits based on the bits received by performing MLSE. The last process uses Viterbi Algorithm hence the process, Viterbi equalisation [2] [9]. Speech coding in GSM transceivers Speech is originally analog in nature and GSM is a digital system. In order to use the speech information, we need to run to a series of process known as speech processing. Figure shows how the speech processing is done in a GSM system. In speech coding, the GSM system has used a variety of ways to fit in 3.1 kHz audio into between 6.5 and 13 kbit/s. The first two codecs used was called Half Rate (5.8 kbit/s) and Full rate (13 kbit/s) [4]. Both of this codecs use LPC (Linear Prediction Function) where voice signals need to be digitized, and secured using encryption over a narrow voice channel. As time passes, the GSM system was further developed to use the Enhanced Full Rate (EFR) codec which is a 12.2 kbit/s codec and it uses a full-rate channel. Figure 8: Flow-diagram on GSM speech processing [8] Full rate speech coder is actually part of the Regular Pulse Excitation – Long Term Prediction (RPE-LTP) coders [4]. Firstly the speech encoder will take an input of 13 bit uniform PCM signal from either the audio part of the mobile station (MS) or the Public Switched Telephone Network (PSTN) side by using 8 bit/A-law to 13 bit uniform PCM conversion. The encoded speech is then delivered to the channel coding function which will then produce an encoded block having 456 bits with a gross bit rate of 22.8 kbps [4] [5]. The remaining 9.8 kbps is used for error protection purposes. The reverse action is performed for decoding. When encoding, 160 frames in 1 sample is encoded to a block of 260 bits with a sampling rate of 8000 samples/s, hence the bitrate of 13kbps [5]. On the decoding part, 260 bits of encoded blocks is mapped back to the 160 frames output reconstructed speech sample. EFR (Enhanced Full Rate) is a newer version of the speech codec which uses ACELP (Algebraic Code Excited Linear Prediction) algorithm. The motivation for this development is because of the mediocre / poor quality of the GSM-Full Rate codec. This codec is a step-up from the previous FR because it provides speech quality equivalent or close to wireline telephony which uses 32 kbps ADPCM (Adaptive Pulse Code Modulation) [6]. This codec can provide wireline quality in both error and error-free conditions [6]. EFR which is also a form of traffic channel is bi-directional and can transmit both speech and data [9]. Figure 9: shows how error correction is done at layer 1 of the GSM air interface Conclusion All in all, this paper has helped me to better understand the GSM system and how it works in the physical layer. GSM has many sources including but not limited to, books, journals, application notes, lecture notes, documentation as well as survey papers. After reading from various sources, I learned to read efficiently and think critically as the papers written are quite hard and requires a meticulous reading to thoroughly understand what is being presented. I acquired basic research and development (RD) skills and technical writing skills after almost a month of heavy reading and research. How the physical layer in the GSM system works is also understood. The acquired signal must first be shaped through a Gaussian filter in the GMSK modulator. The Quadruple modulator scheme is used as it does not require modifications to maintain 0.5 modulation index. ISI in the GSM are mostly caused by multipath propagations in which gives frequency selective fading. Frequency selective fading happ ens when the delay time is spread because symbols arrive at different times. To address the problems with ISI, we need to have an ISI equalizer. ISI equalizer consists of many components such as match filter and MLSE by Viterbi algorithm. I also learned that we have two speech coding options; full rate speech coder and EFR. All this components are essential when building a GSM system. References [1] Guifen Gu, Guili Peng â€Å"The Survey of GSM Wireless Communication System† International Conference on Computer and Information Application (ICCIA) , 2010 [2] B. Baggini, L. Coppero, G. Gazzoli, L. Sforzini, F. Maloberti, G. Palmisano â€Å"Integrated Digital Modulator and Analog Front-End for GSM Digital Cellular Mobile Radio System, Proc. IEEE 1991 CICC vol. 31, pp.7.6.1{4, Mar. 1991. [3] M. Drutarovskà ½, â€Å"GSM Channel Equalization Algorithm – Modern DSP Coprocessor Approarch† Radioengineering Vol. 8, No 4, December 1999. [4] Besacier, L.; Grassi, S.; Dufaux, A; Ansorge, M.; Pellandini, F., GSM speech coding and speaker recognition,Acoustics, Speech, and Signal Processing, 2000. ICASSP 00. Proceedings. 2000 IEEE International Conference on, vol.2, no., pp.II1085,II1088 vol.2, 2000 [5] www.etsi.org, â€Å"European digital cellular telecommunications system (Phase 1); Speech Processing Functions; General Description (GSM 06.01)†, GTS 06.01 version 3.0.0, January 1991. [6] Jarvinen, K.; Vainio, J.; Kapanen, P.; Honkanen, T.; Haavisto, P.; Salami, R.; Laflamme, C.; Adoul, J.-P., GSM enhanced full rate speech codec, Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on , vol.2, no., pp.771,774 vol.2, 21-24 Apr 1997 [7] â€Å"Fundamentals: Signalling at the Air-Interface† Rohde and Schwartz Training Center v1.0 [8] http://www.rfwireless-world.com/Tutorials/gsm-speech-processing.html [9] â€Å"GSM Air Interface Network Planning† Training Document, Nokia Networks Oy, Finland, Jan 2002 [10] Vipin Pathak,â€Å"MLSE BASED EQUALIZATION AND FADING CHANNEL MODELING FOR GSM† (Hughes Software systems, Delhi), pp. 100-104, 2003 [11] Manoj Bapat, Dov Levenglick, and Odi Dahan, â€Å"GSM Channel Equalization, Decoding, and SOVA on the MSC8126 Viterbi Coprocessor (VCOP)† Freescale Semiconductor Application Note, Rev.0, 2005 [12] Baltersee, J.; Fock, G.; Meyr, H.; Yiin, L., Linear MMSE channel estimation for GSM, Global Telecommunications Conference, 1999. GLOBECOM 99 , vol.5, no., pp.2523,2527 vol.5, 1999 [13] Kang, A. S., and Vishal Sharma. Pulse Shape Filtering in Wireless Communication-A Critical Analysis. Pulse 2, no. 3 (2011). [14] James R. Andrews, â€Å"Low-Pass Risetime Filters for Time Domain Applications†, Picosecond Pulse Labs, Application Note AN-7a, March 1999. [15] http://www.ni.com/white-paper/3876/en/ [16] http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/what-is-gmsk-gaussian-minimum-shift-keying-tutorial.php [17] Fred Kostedt, James C. Kemerling, â€Å"Practical GMSK Data Transmission†, MX.com, INC, Application Note GMSK, 1998.

King Leopold and the Belgian Congo Essay -- African History Essays

King Leopold and the Belgian Congo It is widely debated why exactly King Leopold decided to conquer the Congo, but the general consensus seems to be that it was out of the belief that â€Å"the highlands of the Congo may be as rich in gold as the mountains of the western slope of the American Continent† (Stead). In the mid-1870s, the King hired Henry Stanley, who was familiar with many parts of Africa, to help him go about conquering. During the following years Stanley stayed in Africa, talking various tribes into signing over their lands and rights. After this was completed the King officially took over the Congo, renaming it the Congo Free State. This was especially ironic because all natives of the country were either forced to give up their way of life in exchange for virtual slavery in the ivory trade, agriculture, or the rubber traffic, or die trying to escape fate. Leopold was undeterred by the amount of suffering and death in the Congo, brought on by his rule. Belgian soldiers and officials were known f or their cruelty in their methods to make, and then keep, Congo natives wo...

Women Buying Cars Essay -- Exploratory Essays Research Papers

Women Buying Cars      Ã‚  Ã‚   Last spring while trying to buy my first car, I experienced frustration in gaining acknowledgment from salesmen as well as their respect at several different dealerships.   I discovered it was my attitude and approach to the salesmen that would make the difference in the treatment I received from the them in buying a car myself.   I discovered, by informing the salesman from the beginning that I was serious and financially capable of buying a car, I was able to get a salesman to take time in helping me, a high school female, make a car purchase.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Through my experience, I discovered women are at fault for the treatment received from car salesmen while making an effort to buy a car.   The idea that women are insufficient when it comes to buying cars results from the timid approach women take when doing so.   There is no difference in the capabilities women and men have in buying cars.   The difference lies in the approach women take when deciding to purchase a vehicle of their choice.   How can women be treated as equals to the male population when it comes to buying cars?   It all lays in the attitude women take towards the car salesmen.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The stories seem to always be the same when a woman walks onto the parking lot of a car dealership looking for a car.   She walks around the car lot and is approached by a salesman within five minutes.   He asks how she's doing and says, "Well, let me know if there's anything I can help you with." He then hands her a business card and walks away.   If a woman takes a casual approach to walking around the lot viewing the different models, and is too afraid of showing interest in purchasing, of course a salesm... ...a successful purchase.    Works Cited Ayres, Ian and Peter Siegelman. "Race and Gender Discrimination in Bargaining for a New Car." American Economic Review 85.3 (June 1995): 304-22. Howard, Margo. "Don't Get Taken for a Ride." New Choices: Living Even Better After 50 36.3   (April 1996): 58-61. Moyes, Jojo. "Car sexism drives me crazy." World Press Review 43.6 (June 1996): 48-49. Myers, Gerry. "Reaching the Women's Market." Working Woman 22.9 (Sept. 1997): 33-36. Sherman-Chatzky, Jean. "Protest With Your Feet." Money 28.2 (Feb. 1999): 190-91. Tillson, Tamsen. "A women scorned." Canadian Business 69.2 (Feb. 1996): 97-98. Whittelsey, Frances Cerra. "How women can stop paying more than men for the same things."   Money 25.6 (June 1996): 47- 46.

Appalachian Stereotypes Essay -- Appalachia

"Excuse me miss, but you have the cutest little accent," the pizza delivery guy said. "Well, thank you," I replied. "If you don't mind me asking, where are you from? I know that you aren't from around this area with an accent like that." "I am from a little town called Hazard," I replied reluctantly, realizing exactly where this conversation was headed. "Oh, is that where the Dukes of Hazzard are from?" he asks chuckling. "No, that place is Hazzard, Georgia. I live in a little town in southeastern Kentucky." "I bet you all have a lot of barefoot, pregnant people there don't you?" he asks with a discriminating smile. "Well actually we don...." "Huh, I bet you all don't even have paved roads or indoor plumbing," he persisted. "You know what? I don't feel very hungry anymore. Why don't you take that pizza back?" I asked. "Oh, miss, I was just joking with you." This conversation actually took place during my first semester of college. However, being quite accustomed to the questions that I am frequently asked about the place I call home, this conversation somehow made me more upset than usual. This conversation made me realize just how blind society can be towards other groups in society. Different stereotypes are placed on groups for various reasons-race, sex, occupations, and geographical locations-just to name a few. The last of these four different classifications is the one that distinguishes me from most of society. Growing up in Appalachia has made me a minority (different from the rest of society), and also plagued me with many stereotypes. Everyone in society has heard the stereotypes. However, I would like to focus on the how's and why's of them. How they came to be. Why society does perceive... ...ut trying to find your place within society as a minority is even harder. When you go for a job interview and see the person you are being interviewed by shake their head when they hear your accent, you know that you are in trouble. It's the education that is lacking in America. We are known to be this great melting pot. But it isn't until the stereotypes that plague so many Americans come to an end, that we will truly be united as one. Works Cited Asfahani, Magdoline. "Time to Look and Listen." Newsweek Dec. 1996: 18. Billings, Dwight B. "The Road to Poverty: The Making of Wealth and Hardship in Appalachia." Booklist 36 (1999): 38. Norman, Gurney. Kinfolks: The Wilgus Stories. Frankfort: Gnomom Press, 1977. Waller, Altina. "Two Words in the Tennessee Mountains: Exploring the Origins of Appalachian Stereotypes." Journal of Social History 32 (1999): 963.

Advertisement on Tv

IMPORTANCE of TELEVISION Today it is very common in industrialized countries for a household to have at least one television. In fact, it is so common that it is difficult to imagine a household without TV. This shows just how important television is. To understand how important television is, we can look at the variety of programs and valuable content it offers and the purposes it serves in daily life. First of all, there are many different types of programs on television. The viewer can watch a weather report to prepare for the day. Cartoons and sport provide relaxation and fun.School programs, documentaries and the news teach us about the world. And advertisements inform us about products and new ideas. Secondly, the content is very appealing because it is realistic and up to date. As TV is a medium that combines moving, color images and sound, it resembles real life, so the viewers can identify with what they see. Furthermore, modern technology means that the content is up to dat e, for example, news reports can be broadcast live and from all over the world. This means that information is available almost anywhere at any time.Finally, TV can be used to enhance many important aspects of everyday life. People seek entertainment and distraction, and TV can give us that in the form of films or cartoons. People want education, information and instruction because they are inquisitive and like to learn. TV gives us this in documentaries or educational programs, and in reports or cultural programs. People enjoy creativity, and TV gives us that in the work of all the people involved in creating clever film scripts, effective scenery, witty dialogues or magnificent camera shots.TV gives us the world, other cultures, other people, languages and ideas. It introduces us to knowledge. As we have seen, television offers us a wide range of valuable programs and content and serves many purposes in our daily lives. TV not only provides many types of programs with interesting and broad content, but it also serves to fulfill our needs in terms of entertainment and knowledge. TV is an integral and vital medium today. It can contribute positively to the education of society and people’s awareness of others, and it will continue to have a strong influence for many years to comeTelevision is very important in human life. Because these day people has pressure of work and has lot of stress in mind. So television play important role to release pressure and stress byRockks Was this Helpful or Not Helpful Anonymous 74%Helpful It helps us to know what is happening all over the world through the discussions it educates us in the areas we are not familiar with by Anonymous Was this Helpful or Not Helpful Anonymous 77%Helpful Because without it most of us would be living without knowing what is happening elsewhere. by Anonymous Was this Helpful or Not HelpfulArnavcoool 64%Helpful Television has done a lot to our life. if we see the positive side then it is the only system that keeps us uptodate with the different happenings in the outside world. moreover entertainment which is the need of hour is being done by it,in many families it helps student life when they hear some news,watchenglish movies which in a way makes them little bit broad minded. over and above all it is a source of many usefull things that are really necessary to our daily life. byArnavcoool Was this Helpful or Not Helpful Anonymous 54%HelpfulI like it cause its cool, and fun,,so yeah†¦. I love it by Anonymous Was this Helpful or Not Helpful Kristiw 44%Helpful It keeps us up to date on what is going on in the world if you watch the news. Also for us mothers with little ones(I have a 2 year old) it is a great source of entertainment and distraction so I can clean or cook for at least 15 to 20 minutes at a time†¦.. Lol byKristiw Was this Helpful or Not Helpful Anonymous 17%Helpful Television can helps us in our life if the Google TV device is attach with televisio n. Google TV device is the beauty of television.Television entertainment is bored and incomplete without Google TV device. HDMI port is necessary for Google TV device. With Google TV device,we can browse internet on TV. We can enjoy movies, chatting,videos,channels,games including sensor based games,android apps like Pandora, CNBC etc. We can also enjoy TV,internet,android apps at the same time with Google TV device. by Anonymous Was this Helpful or Not Helpful Miss-b 30%Helpful Over 90% of the time because of entertainment, then it's also part of being updated. Television has had a mostly negative effect on society. bahareh Apr 26, 2011, 10:21am #1Television shows are the most popular program that can amuse people who are interested in watching them. Nowadays, people especially children are depended on TV to spend their time, and they would rather to fill up their schedule by sitting in front of TV and watching it. However, watching TV brings mostly negative effects such as threat to the maintenance of traditional family values, children's future, and people's behavior. Nowadays, television threats to the maintenance of traditional family values. Parents spend less time with their children now, and they are too busy to be with their children.However, TV can be the third parent for children, and children are willing to spend the rest of their daily time to watch it instead of being with their parents. However, there were different relationship between parents and children before the TV invention, which was stronger and more connectable. Unfortunately, old values will slowly slip away and new ones, established by TV, will take their place. Watching TV provides many disadvantages for our children's future and their health. While watching TV, children have less play time and also physical activities in open space with their friends, so they won't be able to have a healthy life.Besides, another issue related to watching TV, is a developmental disorder in the part of brain which is for language skill; therefore, children can't pay attention effectively; have concentration. TV has brought many changes in people's behavior, and their response to others. Most of TV shows contains of many various advertisements that could affect on people and mainly on their children. People especially children may have early exposure to wild variety of things such as super hero shows like superman and all things that are related to him and his story, so children try to act like Superman whether it is a good behavior or not.Therefore, media such as TV impacts deeply on children mind, and their virtual view of their life. Finally, although television has had many negative effects on our life, it can be a good tool for learning or discovering new subjects. Sometimes, children use it as a resource to increase their knowledge and information, but not spending too much time only on watching it . As a result, people should consider all consequences of watching TV, and other negative circumstances like losing traditional family values or children's future. Positive impacts on people Positive impacts could be education.There are some very thought provoking and informative shows on tv. It can also give you some needed information about products, services, important dates or alerts, our country, the war, just about anything that is effecting the public at large. Negative could be the allowances of sexuality for minors, negative politics, incorrect information, or if something scary is on it could cause nightmares. positive: helps society remain informed about current events and about other things ( such as nature shows, etc) Positive it give lot's of information is a very good center of news that keep us in contact with our world. ow they have great learning channels like national geographic , discovery and history channel and more on the negative side most of the entertainment is junk and promote to much ideas for violence and sex to young people. n egatives: well, it has been clinically proven that TV's do not affect your eyesight, so just scratch that out. TV do, howver, require that one spend less time socializing about current events and debating on them, as there are many shows that do exactly this and there is no need for a debate anymore,. This affects sociologically. he media affects EVERYONE,including magazines and other sorts of entertainments.. have u realized that ever since television came out,people started to look at guys differently and changed their own appearance.. sort of like imitating the people ur watching cuzur thinking their so special and you want to be like them so badly that uve become a monster.. lmao.. idont think it has a postive impact excluding entertainment Televison is educational even if its a cartoon there is educational stuff in every show you watch. I really didnt notice that untill a year ago but it is true.So next time when your watching something try and see if you can learn something be cause I bet you can. Some experts, however, believe that TV is not all that bad. They qualify though that viewing TV can be good if it is done in moderation, and if the program being watched is selected: Some TV shows can educate, inform and inspire. It can be more effective than books or audiotapes in teaching your kid about processes like how a plant grows or how to bake a cake. Studies show that kids who watch educational and non-violent children’s shows do better on reading and math tests than those who do not watch these programs.Kids who watch informative and educational shows as preschoolers tend to watch more informative and educational shows when they get older. They use TV effectively as a complement to school learning. On the other hand, kids who watch more entertainment program watch fewer informative programs as they get older (Macbeth, 1996). Preschoolers who viewed educational programs tend to have higher grades, are less aggressive and value their studies more when they reach high school, according to a long-term study (Anderson, et. al, 2001).Finally, scientists from the University of Siena found that children experience a soothing, painkilling effect by watching cartoons. So perhaps, a little entertainment TV can be a source of relief to kids who are stressed or are in pain. It is hard to avoid television if you are a kid. People in the house are usually tuned in to TV – siblings as well as parents. In some homes, the television is perpetually â€Å"on† even without anyone watching. It is common for parents and caregivers to use TV as a substitute babysitter. Also, many parents buy videos that they think can make their kids smart. But how does watching TV really affect children?The bad news is, the majority of experts think that a TV/video-driven culture has bad effects on kids – and may prevent kids from being smart. They cite the following: TV provides no educational benefits for a child under age 2. Worse, it st eals time for activities that actually develop her brain, like interacting with other people and playing. A child learns a lot more efficiently from real interaction – with people and things, rather than things she sees on a video screen. TV viewing takes away the time that your child needs to develop important skills like language, creativity, motor, and social skills.These skills are developed in the kids’ first two years (a critical time for brain development) through play, exploration, and conversation. Your kid’s language skills, for example, do not improve by passively listening to the TV. It is developed by interacting with people, when talking and listening is used in the context of real life. TV viewing numbs your kid's mind as it prevents your child from exercising initiative, being intellectually challenged, thinking analytically, and using his imagination. TV viewing takes away time from reading and improving reading skills through practice (Comstock , 1991).Kids watching cartoons and entertainment television during pre-school years have poorer pre-reading skills at age 5 (Macbeth, 1996). Also, kids who watch entertainment TV are also less likely to read books and other print media (Wright ; Huston, 1995). According to Speech and language expert Dr. Sally Ward, 20 years of research show that kids who are bombarded by background TV noise in their homes have trouble paying attention to voices when there is also background noise. Kids who watch a lot of TV have trouble paying attention to teachers because they are accustomed to the fast-paced visual stimulation on TV.Kids who watch TV more than they talk to their family have a difficult time adjusting from being visual learners to aural learners (learning by listening). They also have shorter attention spans. School kids who watch too much TV also tend to work less on their homework. When doing homework with TV on the background, kids tend to retain less skill and information. When they lose sleep because of TV, they become less alert during the day, and this results in poor school performance. TV exposes your kid to negative influences, and promotes negative behavior.TV shows and commercials usually show violence, alcohol, drug use and sex in a positive light. The mind of your kid is like clay. It forms early impressions on what it sees, and these early impressions determine how he sees the world and affect his grown-up behavior. For instance, twenty years of research has shown that children who are more exposed to media violence behave more aggressively as kids and when they are older. They are taught by TV that violence is the way to resolve conflict – as when a TV hero beats up a bad guy to subdue him.Kids who watch too much TV are usually overweight, according to the American Medical Association. Kids often snack on junk food while watching TV. They are also influenced by commercials to consume unhealthy food. Also, they are not running, jumping, or doing activities that burn calories and increase metabolism. Obese kids, unless they change their habits, tend to be obese when they become adults. Researchers from the University of Sydney report a link between total screen time and retinal artery width in children. Kids with lots of screen time were found to have narrow artery in their eyes, which may indicate heart risk.TV watching also affects a child’s health and athletic ability. The more television a child watches, even in the first years of life, the more likely he is to be obese and less muscularly fit, according to a study by the University of Montreal. Even though your kid does not aspire to be a football star, his athletic abilities are important not only for physical health, but predicting how physically active he will be as an adult Why people shouldn’t watch too much television Watching television is an experience shared by most adults and children. It is cheap, appealing, and within the reach of the general public.In this way, TV has become an important mass media around the world. Sadly, this resource isn’t used in a way that people could get the best possible benefits from it. The purpose of this essay is to persuade the reader that people shouldn’t watch too much television because the content of many TV programs is not educational; it makes people waste time that could be used in more beneficial activities; and it negatively affects people’s mental development. The first reason why people shouldn’t watch too much television is because the content of many TV programs is not educational.Nowadays, we can see movies, series, and shows that present scenes of violence, sex, and drugs. This has established wrong concepts among the audience that influence them into having a negative behavior. Moreover, the impact this tendency has on children is worse because they grow up with the idea of a world where women must be slender and blonde to stand out, where problems can only be solved with money and violence, and where wars are inevitable. The second reason why people shouldn’t watch too much television is because it makes people waste time that could be used in more beneficial activities.The time we spend watching TV could be applied to useful activities like exercise, reading, interacting with friends and family, activities that are a crucial for a healthy lifestyle. The third reason why people shouldn’t watch too much television is because it negatively affects people’s mental development. According to several scientific studies, watching TV for prolonged periods of time has a negative effect over the intellectual development of children and leads to deterioration of the mental capacity in older people by causing both attention and memory problems in the long term.In conclusion, people shouldn’t watch too much television because the content of many TV programs is not educational; it makes people waste ti me that could be used in more beneficial activities; and it affects people’s mental development. However, this doesn’t mean that we should ban TV, but if we are going to watch it, we should do it with moderation. Television is a resource that we should learn to use through the right selection of programs by taking an active and critical attitude towards it. Independent Writing: The purpose of television is to educate, not to entertain. o you agree with that? —***— One of the most important inventions of the human’s history is television (TV). Since it was invented, the broadcasting machine has been used for many purposes, it helps people relax, entertain them, not just educates. Obviously, there are many TV programs that are designed to educate people, keep the viewers aware of what are happening in the wide world. Nowadays, in the hasty pace of life, people are spending more and more time on getting knowledge on TV not only for their jobs but also for daily purposes.People can know about the severe war in the Middle East, the presentation of the President or how the NYSE is working. The entertaining purpose of TV is apparent, and it is an important purpose, too. After working hard, a person needs to rest, also, after being educated, he craves for being entertained. Teaching is not all, but teaching and entertaining when go together can have a good effect on TV viewers. The knowledge that they have got earlier can be absorbed more easily later on. They can listen to music, watch game-shows and other pleasure activities. This way, the stress that has strained viewers can be blown out more easily.Not only helping people get out of stress, TV also makes them have new ideas, and thoughts. The colors and sound that they see in many entertainment programs on the screen can somehow affect the brain, motivate it to work in diverse ways, hence the creation of art, songs or even science. The entertaining programs on TV can also connect people all around the world, especially through interactive programs. People can share their opinions, their thoughts about certain global issues, therefore, not only the understanding among countries is improved but also the problems at the time can be solved more easily.Through TV, several songs that bear peace messages, such as â€Å"Heal the world†,can spread to many people, evoking in them the wish for peace and humanity. To sum up, the educating purpose of TV cannot be denied, but is that all while there are also many programs on TV that are designed to make people laugh, cry, be happy or sad? TV should be seen as a device that can both educate and entertain viewers, not just a strict teacher who always forces his learners to be stressful with dry knowledge.