Wednesday, October 30, 2019

Extended Producer Responsibilities Essay Example | Topics and Well Written Essays - 250 words

Extended Producer Responsibilities - Essay Example The consumers can pay a fee when the y purchases a new vehicle. This fee will then be managed by a third party in this case the party can be EPA. On the part of the manufactures I would ensure that they have goals set in recycling the vehicles. This program can be modified on the condition that the manufacturer is located outside the U.S. to comply with the law. This will involve setting a law that requires all imported cars in the United States should come from countries with rigorous disposal laws. Also, an extra import fee should be incorporated to aid the disposal of the vehicle. This program will definitely influence product designers in research & development group. Example plastic which comprise of the largest portion of currently non-recycled material will make the product designers & development group to replace it with materials which can be recycled. Countries who also wish to export automobiles in United States will have to adapt to stringent vehicles recycling

Monday, October 28, 2019

Clashes of Race Essay Example for Free

Clashes of Race Essay Abstract The purpose of this paper is to explore racism and discrimination within America. It was also a goal to show the relationships between racial clashes throughout history, and what the purpose behind the clashes was. By showing these clashes society gets a better understand of what triggers these action within society. Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE In the rather complex world in which society dwells on, society lacks appreciation for the simplicity of the universe. one act or idea can spawn certain events that affect the course of history. to understand history, it is essential for society to look at the causes behind the significance of an event. racial discrimination has spawned social clashes between ethnicities for generations, and it continues to do so. to understand the significance of these events, it is important to analyze the source of these racial clashes throughout history. analyzing the sources of these events provides, if any, patterns of human nature in response to mistreatment due to racial profiling. it is also essential to analyze the basic principles of discrimination within the twenty-first century and what society faces in present day. before analyzing racial discrimination in the twenty-first century, the importance of understanding the different types of racism is needed. There are two types of discrimination that society faces present day, direct discrimination and indirect discrimination. direct discrimination by definition, is when an individual or group is singled out directly by society or an individual based on there race. indirect discrimination is when an individual is singled out surreptitiously by an individual or group. this is more prevalent within present day culture, compared to direct discrimination. the reason being that racism in the twenty-first century is less acceptable among society. the result of racism is that it is less acceptable within modern day society is racism taking on a more enigmatic face. Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE social clashes that resulted from direct discrimination have been apart of america for decades. prime examples of direct discrimination are famously the wars and massacres enacted on early native americans. The reasons for these attacks on native americans were due to new settlers in america wanting to acquire resources from the natives themselves. the colonist’s believed that the natives way of life was inferior to their own, due to the savageness of their own human nature. This is a prime example of micro-aggression in early american culture. Such events such as the â€Å"trail of tears† and many other attacks on the native american’s way of life was justified due to the idea of manifest destiny, which is a belief that the territory was a divine gift to the american colonist. This resulted in constant conflict between american society and native americans in the twenty-first century. it is important to understand how micro-aggression works and operates in the twenty-first century. with modern society changing into a more diversified culture in the United States, it is important to understand how indirect discrimination works in modern society. Society by nature tends to group themselves within certain micro-cultures, it is important to understand this important dynamic due to its purpose within society. this dynamic by nature forces ethnicities to side with a certain set of social norms and values.(West,2004) examples of how this affects modern day society would best be described by conflict with interracial marriages and racial generalization. ethnic grouping has been apart of america since the beginning of american society. the colonist settled in america based on their religions and values, in which the colonist Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE had previously in britain. more modern examples of ethnic grouping would be groups, such as the black panther party, naacp are examples of more modern cases of ethnic grouping.(Jablonski,2012) the common feature of today’s society, also well known as mass media, has a huge impact on racial conflictions with the populace of todays society. one psychological principle says that if an image or idea is shown repetitively that the image or idea will leave an imprint on the mind, later on making the mind recognize the image or ideology as† normalcy†.(Yosso,2002) the mainstream media controls the public agenda, as well as the emotions reflected within society. the mass media needs to recognize the effect in which it has on society, the purpose of the media should be to promote the truth of a matter accurately. This would help balance out racial out lashes between ethnic neighborhood, as well as riots and other ethnic protest. (Vann,2006) in recent times of society, racism in north america has went through a major transformation, especially after the post-civil rights era where the democrats believed in equality for all types of ethnicities that specifically did not get along throughout the history of racism in society(Wamsted,D,2012). This shows the progression of diversity within America. however, even with change in equality the south still shows a higher percentage of direct discrimination as well as indirect discrimination in modern day society than the north. some examples of the result of discrimination can best be depicted is social out lashes of an ethnic communities. this can be shown through protest, as well as more Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE serious demonstrations such as riots. the causes of these demonstrations can be a number of reasons, but one pattern that is shown throughout history is that most social out lashes resulted due to mistreatment among their race. an example of this would be the los angeles riots of 1992. The riots resulted from six officers found not guilty that were accused of beating a black male, rodney king. the riots lasted for six days, and resulted in thousands of injuries and fifty-three deaths.(Watts,2011) however, not every protest result in death and injury. through the civil rights era many protesters believed in the nonviolent approach of martin luther king jr. most protesters believed in sit-ins, boycotts, and other forms of nonviolent forms of protest. however, the effects of racism and discrimination has not stopped america from diversifying, but rather fueled individualism among minorities within america. A study shows that more minorities are striving for higher education within america. derek bok reported in 2000 in his book The Shape of the River that eighty-six percent of black students who enrolled in twenty-eight selective universities across the nation were apart of the middle-class or upper-middle class. This shows not only an increase in african american on college campus, but also the percentage of success among blacks with a stable financial backing. This trend is important to understand due to the progression of diversity within america. It is prevalent that not only income have increased among african americans, but also the number of blacks going to college compared to college statistics of the 1990s and 1980s.(Harring-Smith,2012) to understand the importance of an action, is in essence the greatest ideology or knowledge to grasp. for every action within society has an effect on history. The Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE importance of diversity within society continues to show progression. however, racism will always have its place within society. society has to continue to evolve as well as continue to educate the youth in society to limit the grasp that racism has on america, whether the discrimination is indirect or direct. â€Å"weve got to face the fact that some people say you fight fire best with fire, but we say you put fire out best with water. we say you dont fight racism with racism. were gonna fight racism with solidarity.†-Fred Hampton Running Header: CLASHES OF RACE: UNDERSTANDING THE PURPOSE References: Haring-Smith, T. (2012). Broadening Our Definition of Diversity. Liberal Education, 98(2), 6. Jablonski, N. (2012). The struggle to overcome racism. New Scientist, 215(2880), 26. Vann, A. (2006, June 29). Sometimes the allegation of reverse racism is camouflage for maintaining the status quo. New York Amsterdam News. p. 13. Wamsted, D. J. (2012). Opening Doors for Diversity. Electric Perspectives, 37(3), 26. Watts. (2011). Columbia Electronic Encyclopedia, 6th Edition, 1. West, E. (2004). Expanding the Racial Frontier. Historian, 66(3), 552. doi:10.1111/j.1540-6563.2004.00088.x Yosso, T. J. (2002). Critical Race Media Literacy: Challenging Deficit Discourse about Chicanas/os. Journal Of Popular Film Television, 30(1), 52.

Saturday, October 26, 2019

The Changing Face Of Basketball Essay example -- essays research paper

The Changing Face of Basketball Basketball has come a long way since its soccer ball and peach basket beginnings in that its style, players, facilities and leagues have developed dramatically and gained tremendous popularity. Salaries have increased from Bob Cousy's minute $45.00 a game (Minser 37) to Michael Jordan's $300,000 + per game (Minser 37). Basketball is a sport in which all ages can participate in any way, shape, or form and is a big part of American society today. In 1891 James A. Naismith invented basketball at a YMCA gymnasium in Springfield, Massachusetts (Hollander 4). He told a custodian to nail two peach baskets 10 feet high on opposite ends of the gymnasium walls. The first teams consisted of nine players on each side (this was later changed to five because of roughness) (Hollander 5- 7). The main rules were one could not take more than two steps with the ball, which meant one would have to dribble it and it was not to be a contact sport, so one was not allowed to tackle or push, etc... or a foul would be called. The rules have developed in that a shot clock was installed. The shot clock is a 24 second clock that a team had to shoot within that time period (Minsky 12). Basketball has developed in that players have become more flashy, facilities have become bigger and more complex, and leagues have grown. The 50's marked a period of fundamentals. Teams practiced shooting, dribbling, and passing. they also emphasized execution; something lacking in today's game. Execution is the running of plays to perfection. Basketball in the 50's was dominated by 6'10† George Mikan of the Minneapolis Lakers (Minsky 14).Mikan was a disciplined team leader who had a masterful soft shot. Big George led the Lakers to five National Basketball Association (NBA) championships in six years, making them the first professional basketball dynasty (Minsky 14). Growing up, George was very uncoordinated and was cut from almost every basketball team he tried out for; however, a man named Ray Meyer was the coach of DePaul University and dedicated his training sessions to Mikan (Minsky 15-16). George worked very hard; he even took dance lessons to improve his agility and footwork. He also played one - on - one with shorter but faster players in order to improve his defensive positioning. He also jumped rope, played hours of catch with tennis and medicine balls, and pra... ...arenas, enormous crown support, and plenty of luxuries (Hollander 60-69). Original salaries were microscopic compared to salaries today, especially when compared to other professionals. Basketball today is being sold to the public more than any other sport. Corporate sponsors have lured players with million dollar offers. It is amazing at the difference between the salaries of basketball players and professionals such as teachers, nurses, social workers , and even what we pay our clergy. The public wants to be entertained, and will pay for it, but fails to give adequate payment to professionals who affect our daily lives. The style of play, players, facilities, and leagues have developed dramatically and gained tremendous popularity since its soccer ball and peach basket beginnings. Thesis Statement: Basketball has come a long way since its soccer ball and peach basket beginnings in that its style, players, facilities and leagues have devoloped dramatically and gained tremendous popularity. I. History A. What B. When C. Basic rules II. Development A. First great players B. Facilities C. Leagues III. Salaries A. Original B. Salaries now C. Salaries compared to other professions

Thursday, October 24, 2019

Purchase Orders

ABC Instructor Assignments 1. Ken's Carpets sells carpet for both residential and business use. To better estimate costs, the company recently adopted an activity-based costing system. Last year, the company incurred $300,000 in overhead costs. Based on an intense study of their company, the following activities, allocation bases, and percentages of overhead costs were determined: Activity| Allocation Base| Proportion of Overhead Cost| Purchasing| Number of purchase orders| 25%| Materials processing| Number of square feet| 50%| Sales| Number of sales orders| 25%|The number of activities for residential and business is as follows: | Residential| | Business Total Total Overhead| Number of purchase orders| 700| | 500 1,200 75,000| Number of square feet| 4,000,000| | 2,000,000 6,000,000 150,000 | Number of sales orders| 400| | 100 500 75,000| Required: A. | Calculate the total overhead that should be allocated to each of the three activities. Number of Purchase $75,000, Number of square feet $150,000, Number of sales orders $75,000. | | B. | Calculate the overhead rates for each of the three activities. Number of purchase 62. 5, Number of square feet 0. 025, Number of sales orders 150| | | C. | If a particular residential job requires 4 purchase orders and 1 sales order for total of 1,500 square feet of carpet, how much overhead should be allocated to the job? 4*62. 5 + 0. 025*1,500+1*150 = $437. 50| 2. Mountaineer Tents manufactures and sells heavy and light duty tents to various outdoor retailers. To better estimate costs, the company recently adopted an activity-based costing system.Last year, the company incurred $900,000 in overhead costs. Based on an intense study of their company, the following activities, allocation bases, and percentages of overhead costs were determined: Activity| Allocation Base| Proportion of Overhead Cost| Purchasing| Number of purchase orders| 55%| Inspections| Number of inspections| 20%| Sales| Number of sales orders| 25%| The number of activities for heavy and light duty tents is as follows: | Heavy-duty| | Light-duty| Number of purchase orders| 5,000| | 4,000| Number of inspections| 3,000| | 1,000| Number of sales orders| 800| | 400| Required:A. | Calculate the total overhead that should be allocated to each of the three activities. Number of purchase 4,950, Number of inspection 800, Number of sales 300| | | B. | Calculate the overhead rates for each of the three activities. Number of purchase 1. 82, Number of inspection 5, Number of sales 4| | | C. | If a single sales order requires 10 purchase orders and 30 inspections to fill, how much overhead should be applied to the order? 1*4+10*1. 82+30*5 = 191. 82| 3. The following overhead cost information is available for Millennium Inc. for 2006: Activity| Allocation Base| Overhead Cost|Purchasing| Number of purchase orders| $300,000| Machine setups| Number of setups| 150,000| Quality control| Number of inspections| 50,000| During the year, 4,000 purchase orders w ere issued; 8,000 machine setups were performed; and 2,000 inspections were conducted. Required: A. | Calculate the overhead rates for each of the three activities. Purchasing 75. 00, Machine Setups 18. 75, Quality Control 25| | | B. | If a particular job requires 10 purchase orders, 6 setups, and 5 inspections to fill, how much overhead should be applied to the job? | 10*75+6*18. 75+25*5 = 987. 5

Wednesday, October 23, 2019

Marilyn Bell

Marilyn BellMarilyn Grace Bell Di Lascio is a retired long distance swimmer, born October 19, 1937, in Toronto, Ontario. She was the first person to swim across Lake Ontario and later swam the English Channel and Strait of Juan de Fuca.Personal lifeBell was born in Toronto, Ontario to parents Sydney and Grace Bell. The family moved to North Bay, Ontario, then Halifax, Nova Scotia before returning to Toronto in 1946.[1] After her swimming career, Marilyn married Joe Di Lascio and moved to New Jersey, United States. They raised four children, Lisa, Michael, Jodi, and Janet. Joe died in September 2007.Swimming careerBell first took up swimming lessons in 1946 at Oakwood Pool, joining the Dolphinette Club coached by Alex Duff.[2] In 1947, Bell entered her first long-distance race: a one-mile swim at the Canadian National Exhibition (CNE) in Lake Ontario.[3] It was at that first race that Bell first met her future coach Gus Ryder, who was coach of the Lakeshore Swimming Club. Bell soon jo ined the Lakeshore Club and started practicing at the indoor pool of Humberside Collegiate in Toronto.[4]1954 Lake Ontario swimOne September night, Bell started her swim across Lake Ontario from Queens Beach Niagara-on-the-Lake, Ontario to Toronto at virtually the same time as world famous United States long-distance swimmer, Florence Chadwick. The Canadian National Exhibition (CNE) in Toronto had offered Chadwick $10,000 to swim the lake as a publicity effort for the annual exhibition. Bell, who felt the offer snubbed Canadian swimmers, took on the challenge without pay with the encouragement of Alexandrine Gibb, a Toronto Daily Star reporter. After several hours, Chadwick was forced to give up with stomach pains and vomiting, while 16-year-old Bell completed the swim, the first person ever  to swim the thirty-two-mile (52 km) distance when she arrived in Toronto the next day.A third swimmer, Torontonian Winnie Roach, also attempted the swim at this time, but failed. Bell swam fo r 20 hours and 59 minutes under gruelling conditions before she finally reached a breakwater near the Boulevard Club, west of the CNE grounds. The planned route straight across the lake was 51.5 km (32 mi), but she actually had to swim much further because of strong winds and the lack of modern navigation equipment. Waves that day were almost 5 m high, (up to 15 ft), water temperature was 21  °C (65  °F) and lamprey eels were attacking her legs and arms.Bell kept up her strength with Pablum, corn syrup, and lemon juice with water, along with heroic encouragement from her boat crew and her coach, Gus Ryder. Radio stations broadcast hourly reports of her progress and rival newspapers published â€Å"extra† editions throughout the day. When she finally arrived at about 8:15 p.m., a crowd of 300,000 people gave her an emotional welcome at the Sunnyside waterfront. In an article, Bell later thanked the Toronto community for the support, especially Alexandrine Gibb, the Star re porter.[5] The CNE decided to give Bell the $10,000 prize, and she was later given numerous gifts, including a car, television, clothing and furniture.Other swimsIn 1955, she became the youngest person to swim the English Channel and in 1956, she swam the Strait of Juan de Fuca off the Pacific coast. She retired that year from swimming.Awards and recognitionIn 1954, Bell was named the Canadian Newsmaker of the Year by the Canadian Press, awarded the Lou Marsh Trophy as Canada's athlete of the year and awarded the Bobbie Rosenfeld Award as Canadian female athlete of the year. Bell was inducted into Canada's Sports Hall of Fame in 1958. In 1993 she entered the Canadian Swimming Hall of Fame and was named one of Canada's top athletes of the century. In 2002, Bell (now Marilyn Bell Di Lascio) was presented with the Order of Ontario.The national Historic Sites and Monuments Board designated Bell's crossing of the lake a National Historic  Event in 2005, and a federal plaque was erected in 2008 near the site of her landfall.[6][7] Another plaque is mounted on the base of a statue of a lion along Lake Shore Boulevard by the Government of Ontario Building of the CNE. Parkland near the location where Bell arrived is now named Marilyn Bell Park. In 2009, the Lakeshore Swimming Club of Toronto held the first annual Marilyn Bell Swim Classic, a meet sanctioned by Swim Ontario.In 2010, a ferry boat to serve the Toronto Island Airport was named the Marilyn Bell 1. The name was chosen as the top name in a contest held by the Toronto Port Authority.[8] The story of Bell's historic swim was told in the 2001 made-for-TV film Heart: The Marilyn Bell Story with Caroline Dhavernas portraying Marilyn Bell.

Tuesday, October 22, 2019

Lab on Aspirin Tablets Essays

Lab on Aspirin Tablets Essays Lab on Aspirin Tablets Essay Lab on Aspirin Tablets Essay This lab was basically about finding the percentage of acetylsalicylic acid in an aspirin tablet. First, the base was created, which was made out of 1. 00 g of NaOH and D-water. Then the buret was attached to the clamp on the ring stand and the base was poured into the buret. After that, one by one, an aspirin tablet was dropped into an Erlenmeyer flask filled with 50 mL of D-water so that it could become dissolved. After the tablet was completely dissolved, a few drops of phenol were added, and the base was added very slowly, changing the color of the mixture into a pink. The flask was to be swiveled around. This was done three times, trying to get the pink color to stay for at least two minutes. Materials: * D-water * Scale * Slop beaker * Erlenmeyer Flask x3 * Volumetric Flask * Ring Stand * Buret * Buret Clamp * Phenolphthalein * NaOH * Weighing boats * Aspirin Tablets x3 * Stirring Rod * Scoopula Purpose: The purpose of this lab was to find the percentage of acetylsalicylic acid in n aspirin tablet. Theory/Intro: Aspirin possesses a number of properties that make it the most recommended drug pretty often. It is an analgesic, which means that it is very effective in pain relief. Being an anti-inflammatory agent, it is also provides some relief from the swelling associated with arthritis and minor injuries. It also reduces fever because it is an antipyretic compound. More than 40 million poun ds of aspirin are produced in the U. S. every year. This rate breaks down to about 300 tablets per year for every woman, man, and child. However, repeated use may cause gastrointestinal bleeding, and large doses can provoke a host of reactions including vomiting, diarrhea, vertigo, and hallucinations. The average dose is approximately 0. 3-1 g, but single doses of 10-30 g can be deadly. The most important compound in the synthesis of aspirin, salicylic acid, is prepared from phenol by a process discovered over 100 years ago by a German chemist Hermann Kolbe. Also known as acetylsalicylic acid, aspirin has a chemical formula of C9H8O4. Aspirin is sold over the counter and comes in many different forms. You can have white tablets to chewing gum and rectal suppositories. Also available are coated, chewable, buffered and extended release forms. Over the counter medicines like Alka-Seltzer Original Effervescent Antacid Pain Reliever, contains aspirin for pain relief. Aspirin belongs to a group of drugs called salicylates. Aspirin isn’t so easy on the stomach because it is quickly absorbed into the bloodstream and provides quick and relatively long-lasting pain relief. Aspirin also reduces inflammation. Researchers believe these effects come about because aspirin blocks the production of pain-producing chemicals which are called prostaglandins. While it does relieve pain and reduce inflammation, it also lowers fever by acting on the part of the brain that regulates temperature. The brain then sends signals to the blood vessels to widen, which allow any heat to leave the body more effectively. Procedures: 1. Make 100 mL of 0. 20M NaOH solution. 2. Find mass of one tablet. 3. Dissolve tablet in flask using, 50mL of D-water. Use a stirring rod to assist in crushing and dissolving the tablet. There should be some powdery substances on the bottom of the flask, it’s the starches put in the tablets. 4. While one partner is dissolving the tablet the other one should be setting up the buret and stand. Place the clamp on the stand. Next wash the buret with a little D-water before placing the buret on the clamp. Next fill the buret with NaOH solution up to a place above the â€Å"O† marking on the buret. Open the buret, to allow some of the base to run into a slop beaker thus filling the tip. Make sure the level of the liquid is now below the zero mark. Record the reading after filling the tip. 5. Add several drops of the indicator, phenolphthalein, to the flask. 6. Slowly add the base while swirling the flask. Continue add base until a faint pink color stays in flask. Record the value from the buret. Add a few drops more and see if the color stays and changes. You do not want a dark purple color. Record the final value of base needed. 7. Repeat the process for two more tablets, for three in total. Refill the buret after each trial. Drawing Observations: 1. The aspirin tablets were white. 2. The aspirin tablets had a smooth texture. 3. The aspirin tablets were odorless. 4. The NaOH was a frosted white color. 5. The NaOH was odorless. 6. The base was a clear color; no powdery substances were left behind. . When the NaOH was put in D-water it dissolved thoroughly leaving nothing behind. 8. When the aspirin tablets were put in D-water they took a while to dissolve. 9. When the aspirin tablets were finally dissolved, powdery substances were left behind. 10. When the base was mixed with the dissolved aspirin tablets nothing happened. 11. When the drops of phenol were added, then the mixture turn ed pink. 12. At first, the base was added to quickly so it turned into a dark pink, almost purple. 13. After swiveling the mixture a few times it would lose its pink coloring and turn back into a clear color. 4. At the second try, the base turned into a medium pink color. 15. It stood pink for a longer period of time, approximately 1 minute. 16. The mixtures for all three trials were odorless. 17. At the last try, the base was a light pink color, and it stayed for two minutes. 18. When too much base was added to the phenol/ dissolved aspirin, the mixture would turn into a dark pink. 19. When the base was added in slowly, the pink color lasted a longer time. 20. The faster the base was added, the darker the mixture got, and the longer it took to return to its original clear color. Conclusion: One source of error could’ve been that the NaOH solution that was poured into the buret wasn’t at the zero mark. This could have affected the end results because if it wasn’t at the zero mark that means that we had more liquid then needed, so when the base was poured into the phenol/dissolved aspirin mixture the recordings weren’t accurate. That means that the calculations were thrown off because the wrong amount was used. Another source of error could’ve been that when the 1. 00 g of NaOH was measured it wasn’t exact. The scale is very sensitive and maybe breathing could’ve affected the outcome. This affects our results because now there isn’t as much NaOH as there should be in the base, which could cause a difference when the aspirin and phenol are mixed with base. The color could’ve maybe stayed for longer. The last source of error could’ve been that the base was poured in too quickly from the buret, causing the color change to be off.

Monday, October 21, 2019

The One Answer You Should Never Give in a Job Interview

The One Answer You Should Never Give in a Job Interview Think of your job interview in the same way you think about your resume and cover letter: every word counts. And there are some words, in particular, which should never be said in a job interview situation. Learn to avoid these words. And if you catch yourself using one, be sure to know exactly what you can do to dial it back. Here are the seven most important words to never say:â€Å"I don’t have any questions right now.†This is just plain absurd. Never walk into an interview setting without at least one thoughtfully prepared question at the ready.Plus, there are a few things a hiring manager might assume from not having questions- most of which, hopefully, you did not intend. They might think you are ill-prepared, which, let’s face it, if you don’t have any questions prepared, is both true and unacceptable; do your research! They might think you’re too cocky. They might think you have a lack of enthusiasm about the job. Or- worse- they might assum e you don’t have sufficient respect for them and the value of their time. All to be avoided, right? Right.Instead, try questions like: â€Å"What does an average day look like for you?† which will give you good insight into company culture, as well as giving your interviewer a chance to talk about herself a bit. Or: â€Å"What would be your definition of success in this role?† which does double duty helping you understand their expectations. Remember- you are also interviewing them.You can also ask the bold: â€Å"Do you have any concerns about hiring me?† which might net very honest answers, so prepare to not be defensive.Remember: this is your one chance to impress. Don’t blow it by being less prepared than you can be.

Sunday, October 20, 2019

Two Weeks Notice Email Examples of How to Write the Perfect One

Two Weeks Notice Email Examples of How to Write the Perfect One So you’re moving on and have to send in your two week’s notice email.   The panic has inevitably set in. First of all, know that it’s much preferable to tell your boss in person, then provide your employer with a formal letter of resignation. If you have to quit your job in a hurry and you’re too close to two weeks to write a formal letter, you may be stuck sending a two weeks’ notice email. Giving two weeks, after all, is an important and respectful way to gracefully exit a job. It’s standard practice- the least you can do! Keep in mind that some companies may ask you to leave immediately upon receipt of your letter, but the offer of the extra time to help ease the transition is almost always the right move. If you find yourself in the scenario of having to write a resignation email, here are a few tips, as well as a resignation letter template.1. Name the date.Explicitly state the date when you will leave the company. This gives your boss a clear sense of your timeline and establishes a paper trial.2. Keep it concise.There is no need to go into detail. Convey that you are resigning and when your last day will be. Stifle urges to overshare about your reasons or your feelings and all the rest.3. Offer to help.It’s never a bad idea to offer to be extra helpful in your final two weeks- i.e. helping to train your replacement or shoring up unfinished projects.4. Ask HR questions.You should CC HR on your email. Now’s your chance to ask any questions about benefits or your final paycheck. You should include where to send your last paycheck, and perhaps a forwarding email address for future contact.5. Check it twice.There’s absolutely no shame in thoroughly proofing your email multiple times. Double check everything- spelling, dates, names, grammar. Make it unimpeachable. A classy exit.Still confused? Here is a template you can use as a guide:Subject: Two Weeks NoticeDear [Supervisor’s Name],This letter is to formally give notice that I will be resigning from my position as [Your job] at [Company], effective in two weeks. My last day of work will be [Date two weeks from when you send].I have accepted a position with another company that will further my growth and career development, but I remain grateful to everyone at [Company]. I have learned so much and gained such great experience being part of your team and I appreciate the time and attention you have given me during my time here.During the next two weeks, I am more than willing to help make the transition as smooth as possible. Please let me know how best I can help, whether that be helping to recruit my replacement, or assisting in their training.Again, it has been a pleasure working with you. I wish you, and everyone at [Company] continued success in the future.Sincerely,[Your name]Your Namename@personalemail.comCell Number

Saturday, October 19, 2019

Comparison of Judaism and Islam Research Paper Example | Topics and Well Written Essays - 1750 words

Comparison of Judaism and Islam - Research Paper Example The more understanding we gain with regards to anything, the more broadmindedness we become by evaluating Judaism and Islam. These systems of beliefs share the same thought of worshipping of a supernatural power or god. From this plain word, an enormous figure of individual interpretations has taken place. Religion has not merely turned out to be an arrangement of belief but a source for individualism, pre-eminence and conflict. All the way through the centuries rules have been performed, terrain taken, formed and then ruined and wars have been struggled in an attempt to protect one’s religion. Several religions have close towards nothing in common whereas others have various similarities. As compared with the three foremost western religions: In â€Å"Universal Peace: To Unite a Universal Brotherhood†, Mohammed Talib wrote that â€Å"Judaism and Islam, there have been indications of communal practice, perception and law† (Talib (2005), p. 71). Judaism appears to be one of the ancient religions recognized by man.   Judaism came to view roughly around 4000 years ago.   Several prominent individuals, as said by Arye Forta in the book â€Å"Judaism†, have been â€Å"Jewish citizens like Jesus, Moses, Einstein, Freud, Marx, even Mahler†. This religion is said to be a monotheistic creed, denoting that Jewish natives pray to solely one god.   There weren’t lots of religions like this since it was launched which made Judaism very exceptional during that time.   Nearly all of the religions during those days were polytheistic, meaning that they prayed towards more than one God (Forta (1995), p. 5). On the other hand the â€Å"word "Islam" indicates "obedience to Allah."† This was written in the book of R. W. Maqsood’s â€Å"Islam†. Anybody who does definitely present themselves towards the desires of Allah as obliged by Islam is labeled as a "Muslim," which implies one who has surrendered towards the

Friday, October 18, 2019

Depends on the facility you'll choose Assignment

Depends on the facility you'll choose - Assignment Example autiful and greatly ornamented interior, complete with a carved white marble staircase; benches and counters of carved marble alongside bronze tellers’ windows, and hardware. Formerly the Crocker-Citizens National Bank (later absorbed by the Wells Fargo in the year 1980†²s), the building has extensively been remodeled (Hume et al., 2010).It initially housed an 11 story office tower above it and was enclosed in terra cotta. One of its very outstanding features is considered to be the rotunda entrance that is supported by granite pillars, and having coffered ceiling. The building was originally a â€Å"combination bank and an office building† it is currently considered to be one of the lavish banking interior within the city. By 1960 the building’s sandstone faà §ade was crumbling. So Milton Pflueger, redesigned the faà §ade for the upper floors. Again it was proposed that a new world headquarters tower alongside galleria further west on Post Street to be initiated, the city provided air space instead of the demolition of the upper floors of the building at 1 Montgomery (Robertson, 1879). The roof of this bank is currently a garden for the Crocker Galleria Shopping Center. There are little bats on both the interior and exterior of the window. Within the frieze are wolves, mountain lions and foxes. The animal sculptures look good but their meaning left to be interpreted by the designers. The steel frame building is architecturally clad in gray granite. Its massive pediment which is 38 feet high is held by six ionic columns. The designing and sculpturing of the building was done cities highly prolific sculptures of that time. At a particular time the front was graced using bronze doors. The doors comprised of the four panels designs that symbolized the â€Å"descriptive of the historical succession of the Californian races.† That is; Indian, Spaniard, American and the San Fransciscan. Though, today the doors have been replaced with glass. The inside of the

Questionaire Desgin Essay Example | Topics and Well Written Essays - 500 words

Questionaire Desgin - Essay Example There is a complete process in questionnaire design, over which the questions to be asked are decided, the steps are: specifying the information needed, specifying the type of interviewing methods, determining the content of individual questions, designing the questions to overcome the respondents inability and unwillingness to answer, deciding upon the question structure, determining the question wordings, arranging the questions in a proper order, identifying the form and layout, reproducing the questionnaire and last as the pretesting of the questionnaire. Regarding the question's design, there are few important points need to be focused upon, as a poor design can provide a poor data. There are many types of questions such as unstructured questions that are need to be answered in own words of the respondents, they should be as minimum as possible as the respondent's time is also important and people also hesitate to provide personal information. There are structured questions as well such as multiple choice, which should be used the most, dichotomous questions, which are having only two answers "yes" and "no" or even "don't know", they also should be used frequently to save respondents time and making it easier for the respondent to answer.

Thursday, October 17, 2019

Water Transfer In Poor Countries Assignment Example | Topics and Well Written Essays - 3000 words

Water Transfer In Poor Countries - Assignment Example Not only a management that is expert in the level is required but along with it there is a need to use alternatives water resources for the future water use that is affordable and even if it is not, then external funding for the transfer of the water is required. It tells us that sea water can be used in the developing countries for the different water use requirements. Although the water treatment for the sea water is not an easy task, but still it can be used as an alternative water source. Still the transferring of sea water to different parts of the developing countries could be costly, and extensive water supply engineering is required and a need to manage these water storage and transport facilities is a matter of cost and debate. National geographic society states that if water source is not within one kilometer range then per capita consumption drops to 5 liters/person (National Geographic News, 2003). The sea water hence could be used as a water resource in the developing co untries, but along with this intervention, the need to recycle the sea water must also be taken into consideration. Specially for domestic purposes it could be used as a

Regulatory bodies are best placed to secure environmental protection Essay

Regulatory bodies are best placed to secure environmental protection Discuss - Essay Example The compliance assurance features of better regulation include initiating time limits for regulatory decision making, minimising the onus of paperwork by substituting to self-reporting and enhanced overseeing of compliance monitoring activities so that business assigns minimum resources and time to inspection by government authorities. The UK government so as to overhaul its industrial pollution control system has introduced a new Integrated Pollution Control system (IPC) as early as 1990 through the Environmental Protection Act. The Environmental Act 1995 established the Environmental Agency. (Bohne: 435). Further, the UK government had combined the additional policy objective with its regulatory reform with an aim to regain more influence on European Environmental Regulations. In UK, the Hampton Principles was adopted which outline a regulatory system perused in tune with the requirements of the 21st century where risk assessment will be the foundation for all environmental program mes. Further, the UK government has made public a regulatory code of practice to compel both the local and national regulators to adhere the Hampton Principles. In April 2008, the Regulators’ Compliance Code came into force. Further, UK has also adopted a common framework for evaluating administrative burdens namely the Standard Cost Model. Moreover, the Impact Assessment Guidance issued by the UK Better Regulations Executive needs an evaluation of the â€Å"aggregate annual cost of enforcement of the regulatory proposal. Further, UK government is contemplating to introduce a system of regulatory budgets to minimise the aggregate costs of its new regulations’ adherence cost on the economy. (OECD2009:45). 2. What are the main characteristics of the British system of regulation? What processes are involved? What are its strengths and weaknesses? The UK government so as to overhaul its industrial pollution control system has introduced a new Integrated Pollution Control system (IPC) as early as 1990 through the Environmental Protection Act. UK can be said to be the leader of an integrated pollution control system not only in the Europe but in the whole world. Section 7 (4) & (7) was successfully exported to Europe from UK. As per Emmot and Haigh (1996:305), the IPC concept of â€Å"Best Available Techniques Not Entailing Excessive Cost† (BATNEEC) which was employed to evaluate the emission limit values which reappeared in the BAT specification of the IPPC directive. As per farthing et al (2003:75), the holistic IPC doctrine of â€Å"Best Practicable Environment Option† (BPEO), though not overtly emphasised in the IPPC directive, is mirrored in the regulations of the IPPC directive to accomplish a greater level of safeguard for environment as a whole, and not to shift the pollution from one medium to another i.e. air, water and land through the Art. 9(1) and (3) of the IPPC directive. (Bohne2006:435). UK assumed the leadership role in EU industrial pollution control legislation by exporting the IPC system to Europe. As per Bell and McGillivray (2006:770), UK kept the administrative and legislative upheaval for the transposition of the IPPC directive to a bare minimum. (Bohne 2006:435). EIA – Environment Impact Assessment It is a technique to make us to understand the probable environmental impacts of major projects both the existing and in the development stages also. The regulations and

Wednesday, October 16, 2019

Water Transfer In Poor Countries Assignment Example | Topics and Well Written Essays - 3000 words

Water Transfer In Poor Countries - Assignment Example Not only a management that is expert in the level is required but along with it there is a need to use alternatives water resources for the future water use that is affordable and even if it is not, then external funding for the transfer of the water is required. It tells us that sea water can be used in the developing countries for the different water use requirements. Although the water treatment for the sea water is not an easy task, but still it can be used as an alternative water source. Still the transferring of sea water to different parts of the developing countries could be costly, and extensive water supply engineering is required and a need to manage these water storage and transport facilities is a matter of cost and debate. National geographic society states that if water source is not within one kilometer range then per capita consumption drops to 5 liters/person (National Geographic News, 2003). The sea water hence could be used as a water resource in the developing co untries, but along with this intervention, the need to recycle the sea water must also be taken into consideration. Specially for domestic purposes it could be used as a

Tuesday, October 15, 2019

Code of Ethics Paper Essay Example | Topics and Well Written Essays - 1500 words

Code of Ethics Paper - Essay Example business, if only to function as risk-management mechanisms; included here is the designing of conformity codes and course of action, or more popularly known as code of conduct or ethics (Baker 2006: p. 46). Regardless whether they are referred to as codes of conduct, codes of ethics or any other terms, the community nowadays expects professional and business organizations to possess codes that determine the guiding standards and norms of proper behavior demanded of their constituents. It is all the time more usual for individual business enterprises to also acknowledge the advantages of having these particular codes, advantages that are functional not merely to the businesses themselves but as well as to the personnel of those organizations, and to their shareholders. The progress of a code of ethics within a business organization is fragment of an essential communication mechanism. It facilitates management to put emphasis to the employees of the company the norms of behavior which they should abide by. It provides regulation and direction to employees who are faced with difficult decisions-making problems while carrying out their tasks; thereby it contributes to the creation of a suitable moral environment within the organization. As such, it can function as a tool for the assimilation of new employees into the principles of the company. General Electric, one of the most successful corporations in the world, has issued one set of policies to put into effect its Code of Conduct and to lend a hand of integrity to GE personnel all over the world. The fundamental duties of all employees and managers, consequences and penalties for infringements and how to deal with an integrity problem are discussed in their booklet. Nevertheless, the following are the principles embedded in GE’s code of conduct (General Electric 2004: p. 3): These policies should be obeyed by GE directors, officer, employees, subsidiaries and other controlled affiliates, non-controlled

Monday, October 14, 2019

Create atmospher Essay Example for Free

Create atmospher Essay The writer creates a tense, aggressive and misleading atmosphere. Miller creates a tense atmosphere as Eddie is attacking Rodolfo with sneery comments to lower his self esteem and make Rodolfo look bad in Catherines eyes. The quote thats why the water front is no place for him (Rodolfo) Eddie is making Rodolfo feel unwanted and like this place is no place for you. Also this could imply that Catherine also no place for him and he needs to back off. In the stage direction Miller make the atmosphere tense by I quote (has has been unconsciously twisting the newspaper into a tight role) and everyone is looking at him and acknowledging him knowing how much Rodolfo annoys him. Then miller writes in the stage direction about the paper suddenly tears in two this doesnt only show eddies frustration and strength but also could symbolise Eddie and Catherines relationship, it shows if Eddie keeps on pushing her and twisting their relationship and eventually it will break and Catherine will have to make a decision and that is exactly what happens later on in the play when Catherine has to chose between staying with Eddie or going with Rodolfo and she finally feels she needs to stand up for herself and grow up so goes with Rodolfo. Eddie then moves on to how Marco and him should go see a fight together, and constantly addressing Marco showing he feels Marco as the only person who can put Rodolfo down a peg or two, he loves the dominance over Rodolfo so then takes advantage of this by always asking for Marcos approval on matters on how Rodolfo has done bad, like when Catherine and Rodolfo were out late at the pictures and Eddie states about how Rodolfo might get picked up if hes out that late and how he dragged Catherine off and shouldnt be out so late with her. Marco asks Eddie what has he done and Eddie tells him about being late In and Marco say to Rodolfo you come home early now Eddie loves how Marco can embarrass and be dominant over Rodolfo. When Eddie is talking about fighting Marco is uneasy because he can see that its not a good idea, but Eddie is making the atmosphere so misleading he is being nice and saying things like you want to come and I treat you and he says Ill buy the tickets at this point the reader is not sure of what is going to happen but we have this thought at the back of our head that its not a good idea and foreshadowing danger. Then the atmosphere turns violent and tense, it starts out Eddie saying about how he could teach Marco how to box, then he turns to Rodolfo and then states well come on, Ill teach you instantly this seems an innocent gesture from anyone else but not Eddie, he knows what he is doing and just wants to get back at Rodolfo. He is saying Ill show you a couple a passes these are all excuses he just wants a chance to inflict pain on Rodolfo. Boxing is another manly sport that feminine Rodolfo cant do, and Eddie knows this so takes advantage of this weakness knowing he wont be able to defend himself so expects Rodolfo to be weak. It then turns out that Rodolfo is very good and both Eddie and Marco are praising him so this all seems like a bit of fun but then Eddie is egging him on to do worse and saying dont pity on methrow it we then get this superstition that its not going to turn out well. Eddie then states you cant hurt me but we know this is not true because Rodolfo has already hurt him but through Catherine instead, Eddie knows this and takes advantage of this all the time making the atmosphere tense and aggressive, Eddie knows he has sort of lost Catherine to Rodolfo and is determined not to lose to Rodolfo at something Eddie is good at. Catherine then becomes scared and is the only one sensing trouble so asks what are they doin? and Beatrice doesnt think anything of it and is happy they are finally getting on and cant see the trouble behind it. Eddie seems fine and happy then all of a sudden fakes a punch and lands his right on Rodolfo, Rodolfo staggers. Marco then rises this shows that Marco is not afraid to stand up for his family and is kind of warning to Eddie. Then Catherine rushes to Rodolfo this will seriously anger Eddie as it seems Catherine has already made the decision to go with Rodolfo instead. Eddie senses Catherine is angry with him so instantly comments on how Rodolfo is fine and saying did I hurt you kid? he is trying to keep the atmosphere neutral and not get on the bad side of Catherine. Beatrice then puts and end to it and says thats enough to Eddie. He then says to Marco Ill teach him again and in the stage directions It states Marco nods dubiously this shows that Marco weary of this. Eddie is made out to be a bully and Rodolfo seems even better in the eyes of Catherine for being so good at boxing and not fighting back to Eddies punch. After the boxing the atmosphere becomes tense again Rodolfo puts on the record paper doll and we know that this record has created quite a tense atmosphere in the past because the lyrics symbolises the love triangle between Eddie, Catherine and Rodolfo. The lyrics state about how Catherine is Rodolfos girl and not Eddies anymore and Its tough to love a doll thats not your own and thats how Eddie feels. We know that this was not a good idea for Rodolfo to do then he asks Catherine to dance. Marco can see that Eddie is uncomfortable with this, so Marco sets him a challenge he places a chair in front of him and asks him to lift the chair by one leg and with one arm behind your back, Marco only demonstrates this though, this may imply that Marco wants to be the dominant one and show Eddie how its done after Eddies pathetic attempt to do it, Eddie then proceeds to accept the challenge it. Eddie cant do it and never faults himself and how its because the chair is on an angle not because he isnt strong enough. This could also symbolise about how Eddie feels his judgments are right about Rodolfo and now Marco needs to show Eddie some dominance and prove Eddie is wrong. Marco then raises the chair exactly how he showed Eddie and he carries on hiring the chair all the way above his head and holding it there. The stage directions state Marco gives of a glare of warning to Eddie all the while still holding the chair over his head, he is stating to Eddie to back off and leave Rodolfo alone before he does something his regrets. His glare then turns into a smile of triumph this shows that he has dominance over Eddie and control. Marco ends the scene as the most powerful man. All the while the atmosphere has a constant theme of tension and aggressiveness. In this extract there is pathos which means you feel sympathy for a someone and this particular person is Eddie. He never seems to get what he wants and has been seen as a bully and not a nice person in everyones eyes. We feel pity for him as Catherine has shown she has chosen Rodolfo over Eddie and now Eddie seems powerless and not the man of the house when Marco shows his act of dominance.

Sunday, October 13, 2019

DSP-OFDM Modulator Project

DSP-OFDM Modulator Project Chapter One Introduction to the DSP-OFDM Modulator Project 1.1 Introduction The Orthogonal Frequency Division Multiplexing (OFDM) digital communication technique has been attracting a great concern of researchers all over the world, due to its unique characteristics. The designers and engineers of mobile wireless communication systems and wireless multimedia broadband are looking forward to exploit the OFDM to be the air interface of these devices and systems. This exploitation has already been done with several systems and standards such as Wireless Local Area Networks 802.11a and Digital Video Broadcast-Terrestrial (DVB-T). The DSP-OFDM Modulator project studies the essential parts of the OFDM modulator and demodulator and implements the OFDM modulator and demodulator on two separate DSP boards. For the OFDM modulator, the project studies the hardware DSP implementation of the OFDM modulators different parts such as the QAM mapper and the IFFT. This applies on the OFDM demodulator too. Additionally, for the OFDM demodulator, the project studies the carrier recovery issue to recover the OFDM information signal from the carrier signal and the OFDM symbol timing recovery issue to correctly pinpoint each OFDM symbols boundaries. The Projects involves several aspects of the digital communications and the theoretical and practical DSP and uses the MATLAB and the Code Composer Studio (CCS) to analyze and simulate the designs to be practically implemented. 1.2 The Aim and the Objectives The aim of the DSP OFDM Modulator project is to implement OFDM modulator and demodulator on two separate DSP boards. The implementation is not tied to any existing OFDM standard such that used in the DVB-T or other standards. The DSP hardware implantation comprises many DSP and digital communication operations to be implemented through writing the C codes that perform these operations i.e. the QAM mapping and de-mapping, the IFFT and FFT, the digital IIR filters and the synchronization. Therefore, the implementation will be first simulated by MATLAB and the Code Composer Studio (CCS) part by part before and with the hardware implementation on the DSP boards. The CCS will be used to simulate not only the modulator and demodulator but also the subparts of the hardware implementation such as the FFT and IFFT C codes. For example, the C code that will be used to perform N-Point IFFT to a complex array containing N complex elements to produce N outputs. These N outputs or discrete values will be compared with those N outputs or discrete values obtained from performing N-Point IFFT to the same N element-complex array in MATLAB in order to check that this C code will work properly in the DSP real time implementation of the OFDM modulator. 1.3 The Research Background and Motivations The good presentation of the theoretical and practical DSP during the taught part of the course encouraged me to tackle this project, as I had not done any practical DSP before I enrolled in the MSc Wireless Communication Systems course. The good understanding of the discrete Fourier transform (DFT) allows presenting the Conjugate Symmetric approach. The use of the Conjugate Symmetric distribution of the subcarrier vectors on the IFFT input points makes the IFFT produce a multicarrier signal with a real part (In-phase) (I) only in the time domain, as the imaginary part (Quadrature) (Q) is always set to zero. It is easier to modulate and demodulate the OFDM information signal with a real part only, as the quadrature modulation is no longer required. The Conjugate Symmetric proposal allows applying the FM modulation to transmit and receive the multicarrier OFDM information signal. 1.4 The Thesiss Organization The thesis consists of five chapters. Chapter two is considered as a literature survey. Chapter two explains the OFDM spectrum and the principles of the OFDM modulator and demodulator. It illustrates how the OFDM information signal carries or represents the digital data bits and how the IFFT N outputs (discrete values) are actually the samples of the OFDM multicarrier information signal for the current OFDM symbol being generated. It will be shown how the OFDM symbol has longer duration than those of other digital communication modulation techniques without affecting the data rate to be more resilient with dispersive channels and many other aspects of the OFDM modulation technique. This project is not tied to any existing OFDM standard. However, it resembles these standards in terms of the general block diagrams of the OFDM systems and the use of the pilot carriers, hence the employment of the OFDM in the DVB-T and the WLAN 802.11a are described briefly in chapter two. Chapter three shows and simulates by using MATLAB the approaches and ideas that will be used for the hardware DSP implementation. It discusses the (Conjugate Symmetric) proposal that has come out of this project to facilitate the modulation and demodulation of the OFDM information signal and the use of the squared cosine method to recover the OFDM information signal from the modulated carrier signal. The use of the cyclic prefix (CP) to recover the OFDM symbol timing is also discussed in chapter three. Chapter four presents the hardware implementation of the DSP OFDM modulator and demodulator on two separate DSP boards and shows the different results of the hardware implantation on the oscilloscopes screen as well as it shows the results of the CCS simulation of the OFDM modulator and demodulator and compares the OFDM spectrum of the generated OFDM information signal generated by the Conjugate Symmetric approach with that generated from the traditional method. Chapter five is for the conclusion points that have come out of this project and the further work to be implemented in the future. The attached CD contains the real time DSP implantation CCS projects of the OFDM modulator (OFDM-TX project) and OFDM demodulator (OFDM-RX project) and the CCS simulation of the OFDM modulator and demodulator (Simulation project) as well as the MATLAB codes and an electronic copy of the thesis. Chapter Two OFDM Basics 2.1 Introduction In the digital communications, the transmitted signal over a wireless channel is more preferred, when the symbol duration is significantly greater than the delay spread (s) of this channel to avoid the intersymbol interference (ISI) due to the time dispersion of transmitted symbols. But unfortunately, the symbol duration is reversely proportional to the bit rate which means a great constraint when high data rate transmission is required over a wireless channel with a relatively high delay spread due to the multipath environment of that channel [1]. The OFDM technique produces the solution to this problem, as it divides the high rate bit stream into (N) very low rate bit streams that are transmitted simultaneously using (N) orthogonal subcarriers for every OFDM symbol. Each of these low rate bit streams modulates an individual subcarrier. Therefore, the symbol duration is increased as many as (N) times without reducing the actual bit rate. 2.2 The Spectrum of the OFDM Subcarriers Figure (2-1) y(t) (the dotted curve) is the algebraic summation of the 5 sinusoidal waves Figure (2-2) the spectrum of y(t) in the frequency domain (five stems or tones) Figure (2-3) the rectangular function with (?t) duration in the time domain Figure (2-4) the spectrom of the rectangular function in the frequency domain Figure (2-5) the spectrum of the OFDM symbol with five subcarriers Suppose y(t) is a signal consisting of the algebraic summation of five sinusoidal waves (subcarriers) in the time domain with five different frequencies (f1, f2, f3, f4 and f5) respectively figure (2-1). Suppose these subcarriers have the same frequency spacing (?f) between each adjacent subcarriers in the frequency domain. The spectrum of y (t) in the frequency domain in terms of the magnitude has five stems at f1 to f5 respectively. Each stem (single tone) represents one of these five sinusoidal waves or subcarriers figure (2-2). Now, suppose an OFDM symbol (with symbol duration = (?t)) consists of the same five sinusoidal subcarriers mentioned earlier. The spectrum of this OFDM symbol in the frequency domain does not now consist of five stems; instead the spectrum is like that one in figure (2-5). The spectrum in figure (2-5) consists of five overlapped sinc functions each of which represents an individual subcarrier. Actually, our OFDM symbol is not identical to y(t). More precisely, it is a (truncated y(t)) with truncation duration equal to the OFDM symbol duration (?t). When a signal is truncated in the time domain with equal gain over all the truncated points within the period (?t), that means mathematically multiplying this signal with a rectangular function in the time domain with a time duration equal to (?t) figure (2-3). The shape of the spectrum of rectangular function in terms of the magnitude is single sinc wave in the frequency domain cutting the horizontal axis at points equal to the integer multiples of the reciprocal of the time duration (1/?t) figure (2-4). Basically, when any two signals are multiplied in the time domain, the resultant signal of this multiplication has a spectrum in the frequency domain equal to the convolution of the spectrums of the two original signals. Therefore the spectrum in figure (2-5) represents the resultant of the convolution operation between the fiv e stems of y(t) figure (2-2) and the sinc of the rectangular function figure (2-4) in the frequency domain. Looking at figure (2-5) again, it is easy to notice that the peak of each subcarrier sinc occurs at a point where all other four sincs have magnitudes equal to zero at which. This situation is the condition of the orthogonality between the subcarriers as it ensures the least interference between the subcarriers in the frequency domain. The orthogonality between subcarriers is not achieved, unless the frequency spacing between the subcarriers (?f) is equal to the reciprocal of the OFDM symbol duration (1/(?t)) [2]. 2.3 The OFDM Modulator The OFDM Modulator uses the Quadrature Amplitude Modulation (QAM) Mapper and the Inverse Fast Fourier Transformer (IFFT) to simultaneously generate and modulate the subcarriers of each OFDM symbol. Figure (2-6) shows a general block diagram of the OFDM modulator. The OFDM modulator builds and transmits each OFDM symbol consisting of a number of subcarriers equal to N as follows. The QAM mapper maps the data bits to (N) QAM vectors. Each of these vectors has real and imaginary components and represents a single subcarrier. The number of data bits that are mapped to each QAM vector (subcarrier) depends on the QAM order (M) as shown in table (2-1). Using QAM mapper with higher order produces higher data rate. However, this will be at the cost of the reception quality as the constellation of higher order QAM allows higher Bit Error Rate (BER) for a given The QAM Mapper stage maps data bits to QAM vectors in accordance with the QAM constellation. The Serial to Parallel (S/P) buffers the QAM vectors of each OFDM symbol to prepare them for the IFFT operation. The IFFT stage converts the buffered QAM vectors (the subcarriers) from the frequency domain to produce an OFDM symbol sequence equivalent to the algebraic summation of these sinusoidal subcarriers in the time domain to be buffered in the next stage. Guard Interval Insertion and Parallel to Serial stages add the guard interval to each buffered OFDM symbol sequence and produces it serially to the next stage. The DSP Low Pass Filter (LPF) and The Digital to Analogue Convertor (DAC) stages are to smooth the signal and convert the digital sequence into analogue signal. The Up Conversion and The Power Amplification stages. Figure (2-6) general block diagram of the OFDM modulator. The 4-QAM constellation, which is identical to Quadrature Phase Shift Keying (QPSK) constellation, gives the receiver more tolerance to the changes of the amplitude and phase of any received QAM vector and allows the receiver to de-map it to the correct 2-bit-combination, as long as it still lies in the same quadrant from which it was originated at the transmitter, whereas 16 and 64 QAM constellations give less tolerance to the change in the phase and amplitude of the received QAM vector due to the noise and interference. Not all subcarriers of an OFDM symbol are used to carry the data bits, some of which are used as pilot carriers for the synchronization and channel estimation purposes and for providing the receiver with specific information such as the order of QAM being used by the transmitter. The Serial to Parallel (S/P) stage buffers the N vectors from the QAM stage for each OFDM symbol to produce them in parallel way to IFFT stage. The number of IFFT points is always greater than the number of the subcarriers (N), so the (S/P) pads the remaining IFFT points, which have not been assigned QAM vectors, with zeroes. The IFFT stage is the heart of the OFDM modulator. It gives the QAM vectors the mathematical ability to be considered as the OFDM subcarriers in the frequency domain and converts them to the time domain to form the multi-subcarrier information signal. In other words, as all the (N) QAM vectors of each OFDM symbol are the parallel inputs of the IFFT operation, the IFFT stage considers these QAM vectors as tones or stems in the frequency domain and converts them into correspondent subcarriers in the time domain for the given OFDM symbol duration. Each QAM vector has a specific phase and amplitude which corresponds to the bit combination this vector represents in accordance with the QAM constellation. The IFFT coverts each QAM vector into a correspondent sinusoidal subcarrier in the time domain with amplitude and phase directly related to those of that vector and a frequency that is directly proportional with the sequence of IFFT point, to which the vector has been assigned. That means if a QAM vector with sequence (n) (assigned to an IFFT point with sequence n) generates a subcarrier with frequency equal to (f), the vector with sequence (n-1) generates a subcarrier with a frequency equal to (f ?f) and the vector with sequence (n+1) generates a subcarrier with a frequency equal to (f + ?f). The IFFT stage can simultaneously produce all the N-subcarriers for each OFDM symbol as it performs the conversion from the frequency domain to the time domain for N (QAM vectors) in one parallel operation for each OFDM symbol. The OFDM symbol signal in the time domain represents the algebraic summation of all subcarriers of that symbol. Now, it is obvious how the OFDM modulator divides the high rate bit stream into (N) lower rate bit streams which are simultaneously transmitted over (N times higher OFDM symbol duration) without reducing the actual bit rate. The Guard Interval Insertion stage appends a guard period at the beginning of each OFDM. The Guard Interval (GI) (also called the Cyclic Prefix (CP)) makes a separation between the consecutive OFDM symbols to contribute in the ISI reduction and to eliminate the Intercarrier Interference (ICI) between the subcarriers. The guard interval must be greater than the highest path difference duration. As a result, multipath signals with delay smaller than the GI cannot cause ICI [3]. The guard interval is generally equal to or less than the quarter symbol duration [4]. Practically, the guard interval is generated by taking an exact copy of the end part of the OFDM symbol and adding it to the beginning of the symbol. The guard interval (GI) can be used by the receiver to determine the beginning and end of each received OFDM symbol through the cross correlation operation. Now, the sequence of the OFDM symbol is converted into serial sequence. The Guard Interval Insertion and the Parallel to Serial (P/S) stages are shown as one stage in figure (2-6). The DSP LPF smoothes the information signal. The Digital to Analogue Convertor (DAC) converts the incoming digital sequence into analogue signal. Finally, the Up Conversion and Power Amplification stage mixes the information signal with a locally generated carrier and boosts the resulted signal to be transmitted. The input data bits to the OFDM modulator in figure (2-6) may be first scrambled for the security purposes, encoded for the Forward Error Correction (FEC) purposes and interleaved (to randomize the bursts of error [5]). Therefore, scrambler, encoder and interleaver blocks may precede the other stages to provide the OFDM modulator with scrambled, encoded and interleaved coded bits [6]. It is also possible to up convert the signal whilst it is still in the digital signal processing domain before converting it to the analogue form. The Carrier Recovery and the Down Converting stage recovers the information signal from the carrier signal. The Sample and Hold circuit and the Analogue to Digital Convertor (ADC) stage converts the information signal from the analogue form to produce the digital sequence for the DSP processing. The Guard Interval Removal and the Serial to Parallel (S/P) stage removes the cyclic prefix (CP) and produces all the useful samples of the current OFDM symbol being processed to the FFT stage simultaneously. The FFT stage converts the subcarriers of the OFDM symbol from the time domain to the frequency domain and produces them to the QAM De-mapper as vectors through the (P/S) buffer. One tap Equalizer can be used to equalize the vector constellation after the FFT stage. The Parallel to Serial (P/S) stage buffers the vectors of each OFDM symbol to produce them serially to the QAM De-mapper. The QAM De-mapper assigns each vector to the correspondent bit combination to produce the data bits. Figure (2-7) general block diagram of the OFDM demodulator. 2.4 The OFDM Demodulator The OFDM modulation operation is completely reversed in the demodulator. At first, the information signal must be recovered from the carrier. This is done by the carrier recovery and down converting stage. Figure (2-7) shows a general block diagram of the OFDM demodulator. The analogue to digital convertor (ADC) converts the information signal into a digital sequence. The guard interval removal stage removes the inserted guard interval or cyclic prefix from the beginning of each OFDM symbol. The OFDM demodulator could use the cyclic prefix at the beginning of each OFDM symbol to pinpoint the beginning and end of each symbol, as the cyclic prefix at the beginning of each OFDM symbol is identical to the end part of that symbol within a duration equal to the cyclic prefix duration. Now, the digital sequence of each OFDM symbol, which represents the algebraic summation of the subcarriers signals in the time domain, is simultaneously presented to the FFT stage to convert these subcarriers into their correspondent vectors in the frequency domain. The parallel presentation of the symbols digital sequence to the FFT stage involves the idea of serial to parallel conversion of this sequence. The subcarriers may also be equalized before being presented to the QAM de-mapper using a one tap equalizer. The QAM de-mapper assigns each vector in the frequency domain to the correspondent binary bit combination in accordance with the QAM constellation being used in the transmitter and receiver. The serial sequence of the received coded bits must be de-interleaved and then decoded and descrambled, if the scrambling, encoding and the interleaving are applied in the transmission side. The number of data bits per each OFDM symbol can be easily calculated by multiplying the number of subcarriers that are used to carry the data bits (Payload subcarriers) by the number of bits represented by the QAM vector in accordance with the QAM constellation table (2-1). The carrier recovery operation can also be done after the sample and hold stage within the digital signal processing unit. 2.5 Digital Video Broadcasting-Terrestrial (DVB-T) The DVB-T employs the OFDM due to its excellent performance in the multipath environments which are common in the terrestrial broadcasting, as the OFDM distributes a high bit stream over a high number of orthogonal subcarriers, each of which carries a low bit rate stream simultaneously, which makes the symbol duration much higher than the delay of the indirect paths [7]. The DVB-T has two modes 2K and 8K. As 2K and 8K modes have the same data rata, selecting which mode should be used depends on the requirements. The 2K mode has about 250 Â µ S symbol duration and 4 KHz spacing between its subcarriers, whereas the 8K mode has about 1 m S symbol duration and 1 KHz spacing between its subcarriers. These characteristics make the 8K mode with its higher symbol duration more resilient with multipath situations and channels with a high delay spread but the 2K mode resists better the shift in the frequency caused by Doppler effects due to the relative mobility between the transmitter and receiver, as it has higher frequency spacing between its subcarriers. The DVB-T has (FEC) similar to that of the DVB-S (Satellite) [8]. It has the following code rates (1/2, 2/3, 3/4, 5/6 and 7/8). Not all subcarriers are used as payload carriers to carry the coded bits (data bits + redundant bits); some subcarriers are used for channel estimation and correction. These subc arriers are the pilot carriers which have vectors lying on the I (In-phase) axis of the QAM constellation with angles equal to either 0 degrees or 180 degrees, hence they have only real components unlike the payload vectors which have real and imaginary components in order to recognize between them. The mapping of the pilot carriers to be delivered as vectors to the IFFT stage in the OFDM modulator is achieved through the BPSK modulation which uses the I (in-phase) axis of the constellation. Figure (2-8) shows the locations of DVB-T subcarriers on the 4-QAM constellation. The locations of the payload carriers The locations of the continual and scatter pilot carriers The locations of the TPS pilot carriers Figure (2-7) general block diagram of the OFDM demodulator. The DVB-T uses 4, 16 or 64 QAM to modulate the coded bits to be represented as payload subcarrier vectors, therefore each payload subcarrier can carry 2, 4 or 6 coded bits every OFDM symbol respectively. The DVB-T uses a guard interval length equal to (1/4, 1/8, 1/16 or 1/32) of the OFDM symbol duration [8]. 2.5.1 The DVB-T OFDM Subcarriers The DVB-T 2K mode has 2048 subcarriers, but it only uses 1705 subcarriers and sets the rest to zero. The 1705 carriers are numbered from 0 to 1704. It uses 1512 subcarriers as payload carriers and the remaining 193 subcarriers as pilot carriers. There are three types of the pilot carriers the continual pilots, scatter pilots and the (Transmission Parameter Signaling) (TPS) pilots. The continual pilots have fixed positions in the OFDM symbol spectrum. For example the sequences 0, 48, 969, 1683 and 1704 in the range (0 1704) are reserved as positions for the continual pilots. The continual pilots are used by the receiver to estimate the amount of phase rotation of the received QAM vectors. Every group of 12 subcarrier vectors has only one scatter pilot. The scatter pilots do not have fixed positions. Among each 12 carriers positions there is one variable position for one scatter pilot. The position of each scatter pilot regularly varies from symbol to symbol by jumping 3 positions for ward with respect to its position in the previous symbol. The scatter pilots are used to estimate the channel too. The TPS pilot carriers have fixed positions and are used by the transmitter to inform the receiver about the transmission parameters such as. The DVB-T mode (2K or 8K) Modulation type of the payload subcarrier vectors (4, 16, or 64) QAM FEC code rate (1/2, 2/3, 3/4, 5/6 or 7/8) Length of the guard interval (1/4, 1/8, 1/16 or 1/32) Like the continual and scatter pilots, the TPS pilot carriers lie on the I (in-phase) axis. Each OFDM symbol in the 2K mode has 17 TPS pilot carriers with fixed positions. Within the same symbol all the 17 TPS pilots are either at 0 degrees or 180 degrees. The receiver determines the state of TPS pilots whether the TPS pilots of the received symbol are at 0 degrees or 180 degree based on the majority voting rule. Through the TPS pilots, the transmitter sends the receiver 67 information bits every OFDM frame. The OFDM frame consists of 68 OFDM symbols. The TPS pilots are Differential Bi-Phase Shift Keying (DBPSK) modulated. That means the receiver considers receiving an information bit = (0), if the state of the TPS pilots change from the previous symbol to the current symbol and considers receiving an information bit = (1), if the phase or state of the TPS pilots does not change from the previous symbol to the current symbol. 68 OFDM symbols are required to transmit the 67 informatio n bits, as the first symbol is used to determine the initializing state of the TPS pilots. The 67 bits inform the receiver about the transmission parameters, for example: Bits 26 and 27 represent the QAM order (00=4, 01=16, 10=64) Bits 31, 32 and 33 represent the code rate (000=1/2, 001=2/3, 010=3/4, 011=5/6, 100=7/8) The DVB-T 8K mode has 6817 subcarrier per each OFDM symbol. The subcarriers of the 8K have the same principles and use of those of 2K with difference in their numbers only. Table (2 2) shows the different subcarriers of both 2K and 8K modes. The scatter pilot carriers have two different numbers of the subcarriers, as the scatter pilot carriers coincide with fixed locations of the continual pilot carriers due to their jumping [8]. 2.6 WLAN 802.11a Wireless Local Area Networks (WLANs) 802.11a employ OFDM as a digital communication technique for reliable and high data rate transmission. Each OFDM symbol is expressed by 64 subcarriers, but the actual used subcarriers are (52) (64 52 =12 subcarriers are set to zero). There are 48 payload carriers to carry the coded bits (data and redundancy bits) and 4 pilot carriers. The frequency spacing between the subcarriers is (?f = 312.5 KHz). The required channel bandwidth can be calculated by multiplying the total number of subcarriers by the frequency spacing = 312.5 K * 64 = 20 MHz. To achieve the orthogonality between the subcarriers the OFDM symbol duration (?t) must be equal to the reciprocal of (?f) (?t = 1/ ?f), hence ?t = 1/312.5 KHz = 3.2 Â µs. 802.11a appends a guard interval (GI) equal of (1/4) the OFDM symbol duration at the beginning of each OFDM symbol (GI = 0.25 * 3.2 Â µs = 0.8 Â µs), therefore each OFDM symbol occupies (3.2 Â µs + 0.8 Â µs = 4 Â µs) time interval. That means a wireless device transmits 250,000 OFDM symbol per second. 802.11a allows wireless devices to have (8) transmission data rates or modes (6, 9, 12, 18, 24, 36, 48 and 54) M bits/sec. 802.11a uses (BPSK, QPSK, 16-QAM or 64-QAM) to modulate the payload carriers and uses (1/2, 2/3 or 3/4) code rate for the FEC in accordance with transmission data rate being used. The different (8) modes use different modulation types and different code rates as shown in table (2-3) [6]. 802.11a uses BPSK modulation to modulate the payload carries in modes 1 and 2 unlike the DVB-T which only uses QAM modulation to modulate the payload carriers. For each mode, the OFDM symbol has the same total duration (4 Â µs) (250,000 OFDM symbol/Sec) and the same channel bandwidth (20 MHz), as it has the same number of subcarriers (48 payload carriers and 4 pilot carriers). Looking back at table (2-3) (Mode (8) 54 Mbps), as the 64-QAM modulation is used to modulate the payload carriers, each payload carrier in the OFDM symbol carries (log2 (64) = 6 coded bits). Each OFDM symbol carries (48 payload carriers/OFDM symbol * 6 coded bits/payload carrier = 288 coded bits / OFDM symbol). The number of data bits per each OFDM symbol = 288 * (code rate = 3/4) = 216 data bits / OFDM symbol. There are 250,000 OFDM symbols / Sec, hence the data bit rate = 216 * 250,000 = 54 Mbps. Chapter Three The MATLAB Analyses for the Hardware Implementation Approaches 3.1 Introduction Throughout this chapter the ideas and approaches that will be used for the DSP hardware implementation of the OFDM modulator and demodulator on two separate DSP boards will be discussed and simulated by using the MATLAB. There are mainly three approaches. The use of the (Conjugate Symmetric) with the carrier vectors which are the inputs of the IFFT stage in the OFDM modulator to produce an OFDM information signal in the time domain with a real part only for easier modulation and demodulation, which is the proposal that has come out from this project. The use of the squared cosine to recover the OFDM information signal from the carrier signal in the receiver (the synchronization of the carrier frequency signal). The make use of the guard interval (GI) or the cyclic prefix (CP) for the synchronization of the OFDM symbol (i.e. The Symbol Clock Recovery) to allow the receiver to know the correct boundaries of each received OFDM symbol to set the FFT window at the correct positions of the received OFDM signal. 3.2 The Mathematical Analysis of a Multicarrier Signal To understand the idea of the (Conjugate Symmetric) and the role of the IFFT and FFT in the OFDM system, lets consider y(t) as a continuous multicarrier signal with a real part only in the time domain consisting of the algebraic summation of five sinusoidal waves or subcarriers which have the following frequencies (1, 2, 3, 4 and 5) KHz and phase shifts (p4,,3p4, 5p4, 7p2, 9p4) respectively with equal amplitude = (28) for each. For our y(t), each two adjacent subcarriers (in the frequency domain) have 90 degrees phase shift. y(t) can be expressed in the time domain as in Eq. (3-1) It is not necessary for the five subcarriers forming y(t) to have the same magnitude. It is just to simplify this discussion. Now, if y(t) is sampled with sampling frequency (Fs). Fs must be greater than (2 * 5 KHz = 10 KHz), where 5 KHz is the highest frequency of y(t) according to the Nyquist-Shannon theorem. Nyquist-Shannon theorem stipulates that the sampling rate or frequency must be at least two times greater than the highest frequency of the sampled signal to avoid the aliasing which prevents providing the DSP system with a right copy of the sampled signal [9]. When a continuous signal in the time domain is sampled, a sample is taken at every (t = n * Ts). Ts is the sampling interval (Ts = 1 / Fs) and n is zero or positive integer number representing the sequence of the sample. y(t) is no longer continuous. Now, y(t) represents a sequence of discrete values. In Eq. (3-1), y(t) is replaced by y(n) in the left hand side and (t) is replaced by (n * Ts) or (n / Fs) in the right hand side as in Eq. (3-2). If Fs is set to 16 KHz (16 KHz > 10 KHz) and 16-point FFT operation is performed to y(n) to produce y(n)s spectrum in the frequency domain in order to study it. The 16 point FFT operation needs 16 discrete values or samples of y(n) for n = 0, 1, 2,13, 14, 15. The results of 16 point FFT operation are 16 complex vectors in the frequency domain. The 16 discrete values (samples) of y(n) are the inputs of the FFT in the time domain and the outputs are 16 complex vectors of Y(m) which represents y(n)s spectrum in the frequency domain. Table (3-1) lists the 16 discrete values of y(n) in the time domain and table (3-2) lists the 16 vectors

Saturday, October 12, 2019

Violence: Children Who Own The Streets Essay -- essays research papers

Violence: Children Who Own The Streets   Ã‚  Ã‚  Ã‚  Ã‚  There are many problems facing today's society. One of the problems is the violent condition that surrounds the lives of children in America. We are awarded of the violence among our juveniles because we read, hear and see it. The newspapers, magazines, news media, and our neighborhoods testify the living proof of the chaos. Everyone tries to find explanations of the causes and consequences of street violence and other aspects of the turbulent lives of young people. Yet, the problem facing our juveniles will not be solved over night. But that's not a reason enough to ignore the problem. It will only make matters worse and keep on doubling through the years. It is our duty as citizens, friends and family to start trying to make that difference. It is frustrating to know that violence among the children of America is increasing in many aspects. The crimes are starting to vary. It's not like in the past, where kids only stole candies or disobeyed curfew laws. Now children steal, murder, rape and use drugs. This is not the America that we knew, this is a battle. What can we do to influence these kids to stay off trouble? First of all, we have to realize this is a very serious problems. And it has to be stopped. The second step is to figure out what causes children to be violent and become juvenile delinquents. This negative attitude causes them to lead a life of delinquency and a life isolated from society's idealistic world. When we ask these question, many others come in mind. Does these problems begin in the family? Are parents good role models or are they condoning the violence? How can we prevent parents from destroying the minds and future of these children? If we try to deny a teen who seeks help, they will only turn to the streets, drugs, and gangs. When they turn rebellious they will commit crimes, minor or major. Juvenile violence is a problem, it leads to crime and segregation. If it's not lessen, it will only keep doubling. And then the future of America will devour.   Ã‚  Ã‚  Ã‚  Ã‚  Some of the main concerns of violence revolves around the family atmosphere. Some families are not creating a secured environment for their children. Instead, these children get exposed to illegal behavior and violent actions in the homes. Family morals and values play an important role ... ...are by far the most frequent type of offense. These include stealing from shops, houses, and cars; and the unauthorized taking of the person ( assaults, fighting, robbery with violence ), together with sex offenses and, in industrially developed countries, traffic offenses, come next and are more common among those aged from 17 to 21. Narcotic addiction and other types of drug dependence, though not always criminal offenses, are a relatively new and disturbing form of deviance and seem to be increasing rapidly. The 1991 UK National Prisons Survey found 83 percent of lock up young offenders had been in council care, against 2 percent of the population as a whole. In 1992 in Britain, 110,4000 children aged 10-16 were caught breaking the law; 75 percent were boys. By far the most common crime was theft or handling of goods. Throughout the 1980's juvenile crime fell in UK: 100,000 cautioned or convicted in 1992, 37 percent fewer than a decade earlier. The young population had also fallen, but only by 2o percent. In 1992, there were 3,764 male juveniles per 100,000 convicted or cautioned; in 1982 the figure was 5,028. The fall was the biggest among boys aged 10-13: from 2,929 to 1,927.

Friday, October 11, 2019

Natural Variations In Climate And Human Health Environmental Sciences Essay

The El Nino/Southern Oscillation is a natural fluctuation in the Earth ‘s clime. The fluctuations associated with the El Nino/Southern Oscillation may be used as a theoretical account for future clime alteration and its attendant wellness effects. It is no premise that anthropogenetic clime alteration is happening and the environmental wellness effects associated with it are traveling to be one of the greatest challenges of our clip. As our apprehension of anthropogenetic clime alteration increases it is every bit of import to hold a basic apprehension of natural fluctuations in the Earth ‘s clime. Furthermore, a better cognition of those countries that experience extremes associated with the El Nino/Southern Oscillation ( ENSO ) may clarify some of the future impacts of planetary clime alteration. The focal point of this literature reappraisal is an scrutiny of the natural fluctuations associated with the ENSO and its impacts on human wellness globally. I reviewed major findings from publications, thesiss, and internet media sing clime alteration, ENSO, and public wellness. My aim was to reexamine articles that clarify the planetary effects of natural fluctuations in clime, specifically ENSO and wellness by integrating the undermentioned inquiries: What is the El Nino/Southern Oscillation? What are the wellness effects of three chosen illustrations of environmental alterations ( catastrophes ) associated with ENSO. I have designed my research and reappraisal to follow an Earth scientific discipline position on planetary alteration, adapted from a publication by the Johns Hopkins university imperativeness ( Aaron and Patz 2001 ) .WHAT IS THE EL NINO/SOUTHERN OSCILLATION?Get downing with the empirical literature on Earth scientific discipline and public wellness, I foremost reviewed the work of Aaron and Patz ( 2001 ) . The work is a digest of research related to the subject of ecosystem alteration and human wellness. The chapter by Fisher ( 2001, 233-250 ) was peculiarly enlightening and descriptive. It provided a good starting point in understanding what ENSO is. This chapter provided a reasonably comprehensive yet apprehensible account on the â€Å" forces † behind ENSO, peculiarly the Earth ‘s energy rhythm. Although this publication is clear, it did n't further a solid reading of the ENSO anomalousness. I attributed this ambiguity to the fact that the range of this book is much broader than the focal point on natural clime variableness. In seeking to associate proposed and observed wellness effects to the ENSO it is critical to hold a reasonably comprehensive apprehension of what it is. For this intent, I reviewed publications by the National Oceanic and Atmospheric Administration ( NOAA ) , the Intergovernmental Panel on Climate Change ( IPCC ) , and the United Nations Food and Agriculture Organization ( FAO ) . The publication by NOAA was presented in an apprehensible yet simplistic format. A part of their web site a page is dedicated to the ENSO, but it does non provided a clear account of what it is. Further research into the NOAA web site led me to the National Weather Service ( NWS ) â€Å" Climate Prediction Center † , where they have a measure by measure tutorial of ENSO and clime variableness. I performed a qualitative comparing of all ENSO specific literature from the IPCC, NOAA, NWS, and FAO. The four studies had the same basic information, while the IPCC was by far the most comprehensive. The lite rature reappraisal for this part must be limited to merely a qualitative analysis because the forces behind ENSO are immensely interrelated and complex. A full synthesis of this information is good beyond the range of the paper. The most of import facet of my comparing is specifically related to assorted definitions of ENSO. EL NINO DEFINED I decided to add this subdivision due to the ambiguity I encountered sing the scientific discipline behind ENSO. As my research progressed it became clear that this ambiguity was non due to a deficiency of information, but due to a general consensus that the factors doing ENSO are extremely legion and interconnected. In consequence, a quantitative definition of ENSO can non be exactly developed. Furthermore, what constitutes a quantitative ENSO in one portion of the universe is different in other parts, hence any quantitative definition of ENSO would hold to be location specific ( Ternberth 1997 ) . In my comparing of the above literature, the definitions of ENSO were all qualitative and similar. For this ground I sought specific literature sing the definition of ENSO. The most formal definition that encompasses the battalion of utilizations is as follows: El Nino ‘el ne – ‘ nyo – noun [ Spanish ] 1: The Christ Child 2: the name given by Peruvian crewmans to a seasonal, warm southward-moving current along the Peruvian seashore & lt ; la corriente del Nino & gt ; 3: name given to the occasional return of remarkably warm H2O in the usually cold H2O [ upwelling ] part along the Peruvian seashore, interrupting local fish and bird populations 4: name given to a Pacific basin-wide addition in both sea surface temperatures in the cardinal and/or eastern equatorial Pacific Ocean and in sea degree atmospheric force per unit area in the western Pacific ( Southern Oscillation ) 5: used interchangeably with ENSO ( El Nino-Southern Oscillation ) which describes the basin broad alterations in air-sea interaction in the equatorial Pacific part 6: ENSO warm event equivalent word warm event opposite word La Nina [ Spanish ] the immature miss ; cold event ; ENSO cold event ; non-El Nino twelvemonth ; anti-El Nino or anti-ENSO ( dyslogistic ) ; El Viejo ‘el vya- Ho – noun [ Spanish ] t he old adult male. ( Glantz 1996 )EL NINO RELATED DIASTERS AND HEALTH EFFECTSHarmonizing to Kovats ( 1996 ) , â€Å" The consequence of El Nino on catastrophes is strong plenty to be evident at a planetary degree. In an mean El Nino twelvemonth, around 35 per 1000 people are affected by a natural disaster-more than four times that in non-El Nino old ages, based on 1963-93 informations † ( 1483 ) . The wellness impacts of natural catastrophes are both immediate and long lasting ( Haines, et Al. 2006 ) . In order to derive a better apprehension of the specific wellness impacts of ENSO catastrophes I reviewed literature based on the two major conditions events associated with ENSO, heavy rainfall and drouth. I farther separated these events into three degrees of badness: 1 ) Drought ; 2 ) increased rainfall ; 3 ) Deluging. In add-on, I want to synthesise this information to give an overview of the planetary effects of ENSO from developing to developed states.DroughtENSO as defined above is an addit ion in sea surface temperature in normally cool H2O in the eastern Pacific Ocean. During a terrible ENSO the warm H2O that remains suspended in the western Pacific travels east, therefore diminishing rainfall in the West Pacific and increasing it in the eastern Pacific. This alteration alters the rainfall patterns across the Earth. Harmonizing to Haines et Al. ( 2006 ) , the figure of people worldwide affected by drouth is influenced strongly by the ENSO rhythm. Droughts have a broad consequence on wellness runing from nutrition to forest fires doing air pollution, peculiarly in low-income states. Haines et al. raise of import inquiries on the construct of exposure and unexpected wellness results. Vulnerability has been discussed in literature as a cardinal construct for understanding how populations adapt to climate alteration and variableness ( Mertz, et al 2009 ; Moran, et Al. 2006 ; Patz and Kovats 2002 ; Solomon, et Al. 2007 ) . It is widely accepted that the most vulnerable populations to climate alteration and fluctuation occupy the low income developing states. This has a great trade to make with the fact that many dwellers of developing states rely to a great extent on subsistence agribusiness. Furthermore, with drought one would anticipate malnutrition but there can be many other unanticipated wellness effects. As a specific illustration I refer to Moran et Al. ( 2006 ) and the survey of ENSO related drouth in Amazonia. This paper provides a good description of the exposures of developing states to drought and its unexpected wellness results. Moran et Al. depict this relationship by associating increased forest fires due to ENSO and swidden agribusiness with inauspicious respiratory wellness effects caused by fume and particulate affair. The most ENSO drought prone countries include: Sub-saharan and southeasterly Africa, northern Australia, Indonesia, Papua New Guinea, western Pacific Island Nations, and north-east Brazil. Most of these countries lay within developing states of the southern hemisphere, which are besides the most vulnerable to these conditions extremes.Increased RainAlthough the most vulnerable groups to climate alteration and fluctuation are the developing states, this does n't intend that effects are limited to these geographic countries. ENSO has really of import wellness effects around the Earth. Literature sing increased rainfall and increased incidence of hanta virus pneumonic syndrome ( HPS ) in the sou'-west United States serves as an illustration of ENSO wellness effects in developed states. Harmonizing to the Centers for Disease Control ( 2004 ) , during an ENSO event increased rainfall across the southern parts of the United States every bit good as parts of Central/South America creates an improved gnawer home ground, the major vector of HPS. The literature by the CDC is web-based and although it has been updated in is in direct relation to the 1998-99 ENSO event. In a thesis by Conley ( 2006 ) , an in-depth survey of HPS in the sou'-west United States is conducted. Conely ( 2006 ) describes the increased incidence of HPS in the southwest U.S. with endorsing from the trophic cascade hypothesis. The southwesterly cervid mouse is the primary vector for HPS in worlds. During an ENSO event the sum of flora is increased due to increased rainfall. In consequence, the population denseness of cervid mice is increased and so is HPS. As the ENSO warm event passages into a cold event ( La Nina ) , rainfall lessenings in the southwest U.S. and these rodent populations begin looking for nutriment in human homes. The increased contact between septic gnawers and worlds increases the incidence of HPS. Other literature ( Kovats 1999 ; Patz and Kovats 2002 ; Haines 2006 ; Parmesan and Martens, 2009 ) describes farther instances of ENSO and increased infective disease incidence as a consequence of increased rainfall. Further surveies have found positive correlativities between ENSO and malaria, rift vale disease, cholera, and others.DelugingImplosion therapy is the most common natural catastrophe in both development and developed states ( Ahern, et al 2005 ) . For this part of the paper I reviewed epidemiologic grounds of inundation related wellness impacts and ENSO events. On a planetary graduated table, ENSO is non associated with hazard of flood-related catastrophes because inundations are really localised ( Kovats 1999 ) . However, the increased rainfall associated with ENSO has specific effects on the water partings of many states throughout the universe. Harmonizing to Patz and Kovats ( 2002 ) ENSO frequently increases the hazard of implosion therapy of rivers. Besides: â€Å" Immediate effects are mostly decease from submerging and hurts caused by being swept against difficult objects. Medium term effects include additions in catching diseases caused by consumption of contaminated H2O ( for illustration, cholera or hepatitis A ) and contact with inundation Waterss ( for illustration, swamp fever ) . † ( pg. 1096 ) In inundation conditions, there is a greater possible for increased transmittal of disease, particularly in countries where the population does non hold entree to clean H2O and sanitation ( Ahern, et Al. 2005 ) . Direct illustrations of increased disease transmittal as a consequence of ENSO related implosion therapy is seen in Brazil where hazard factors for swamp fever included implosion therapy of unfastened cloacas and streets. Furthermore, the 1982 El Nino event caused extended implosion therapy in several states in Latin America and fostered crisp additions in malaria ( Ahern, et al 2005 ) .DecisionThis reappraisal provided a brief expression at the ENSO anomalousness and its effects on human wellness. ENSO increases the hazard of drouths and inundations across the Earth. In add-on, there is strong epidemiologic grounds that supports an association of these events and the transmittal of certain diseases. These associations and the affects span the Earth, but the most vulnerable populations are those in the underdeveloped states. The literature reviewed nem con agreed that ( in the short term ) there is a drastic demand to supply information and tools that let these populations to fix for such conditions anomalousnesss. Particularly in countries where ENSO can faithfully be associated with regional or local clime fluctuations such as drouths and inundations ( Kovats, et Al. 1999 ; Moran, et Al. 2006 ; Haines, et Al. 2006 ) . Furthermore, long term guesss in the literature agree as clime continues to increase there is a high likeliness that ENSO conditions anomalousnesss will beef up in badness, continuance, and frequence ( Ashok and Yamagata 2009 ) . An accurate apprehension of this will supply a greater ability for all to restrict exposure to climatic fluctuations and make new schemes for wellness contrivers to cut down disease hazard.