All About Reflection Essay

All About Reflection Essay Moreover you are advised to try to find some illustration of argumentative. The Cornel Method is used most by student because it's the simplest and most efficient method of note taking. Types of the whole argument. Young folks must understand how to compose a reflection paper to produce their buddies and the remainder of community share their emotions. The techniques you've been taught the previous years aren't nything like the techniques you're going need in college. For instance a young child could be taken advantage of for his great talent in a particular area or the jealousy which exists in everybody's lives. Just take a look when you have time. It's an essay within which you include a personal experience or a number of experiences, together with direct details about the events. You just have to share an experience. You must return to your prior life experiences and provide a very clear account of a specific event, happening or feeling. Overall it's been an amazing experience to relish. Naturally, you will require an adequate plan to come up with your paper. This essay must reflect your expertise and abilities so the committee can be sure that you are the absolute most proper candidate for the course or job. The papers are lots more difficult to write. Describe your first research strategy. Other tips are to sit facing you class so that you are able to see everything. Except for the primary components of your reflective essay, there are a few other essentials to think about. There's no ideal solution on the best way to compose an effective essay. Employing this guide, you can discover some other helpful recommendations to compose a correct reflective essay. Writing an essay is a critical role in academe life. Thesis is the center of the whole work, which comprises the important information on the full essay. Essay writing proved to be a large part of the class. It is commonly practiced is schools. Occasionally, you might be missing some fantastic suggestions for your reflective essay topics. Learning how to pick out key statements and important sections of a bit of writing is a rather important skill to get. When you make an outline, you are going to have clearer view of the more evolution of your literature work. To offer you a bit of additional support, here is a downloadable reflective essay outline template. Assuming you don't have an assigned structure, there are just a few steps involved with developing a self-reflection essay. Therefore, many students and employees decide to purchase inexpensive essay rather than writing it themselves. Because you have to share your private experience, it may not be quite as simple to compose such paper, and developing a crucial reflection essay about yourself might develop into an ordeal. The personal experience that you opt to study in your reflective essay has to be comfortable for you. Self reflective essay do not need much research as with other kind of research. Self reflection essay appears simple to write, but only from the very first sight. A great reflective essay may be a terrific reflective essay with the appropriate planning. It is crucial to be aware that in the event that you are writing an informal self reflection essay, you don't necessarily have to be so direct.

Syria Is The Heart Of The Middle East - 1419 Words

Syria is located in Southwest Asia. According to National Geographic Syria is considered to be the heart of the Middle East because of its borders. Syria borders Lebanon, Israel, Jordan, Iraq, Turkey, Cyprus, but most importantly the Mediterranean Sea. Even though, the relationship between Russia and Syria wasn’t the best throughout the years it has become important. Syria has become an important ally to Russia. Russia and Syria’s relationship can be best described as a strategic plan. It can be viewed as a strategic plan due to Russia’s main concerns or interests toward Syria’s weapons, trade, natural resources and the access to the Mediterranean Sea. The Syrian Civil War is a war fought to bring an end to the Authoritarian practices performed from the Assad family (Sharwood, pg. 1). From 1971 to 2000 Hafez al-Assad was President of Syria. Following the reign of Hafez al-Assad his son Bashar al-Assad became President of Syria. Throughout the reign of his father violence was used to suppress protests. This included the excessive use of police, military and paramilitary forces. Therefore, these practices have served as a guide to solving problems. It is stated, â€Å"The malign but tactically brilliant Hafez al-Assad blighted the Middle East with disproportionate Syrian influence for decades. His son, the feckless Bashar, has continued this pattern since 2000 by sending terrorists to Iraq, murdering Lebanon s Prime Minister Rafiq al-Hariri, overthrowing his son Saad, aiding theShow MoreRelatedU.S. and The Middle East Essay893 Words   |  4 PagesThe role of the Middle East has been very crucial to the United States, especially after WWII. The U.S. had three strategic goals in the Middle East and consistently followed them throughout various events that unfolded in the region. First, with the emergence of the cold war between the Soviet Union and the U.S., policymakers began to recognize the importance of the Middle East as a strat egic area in containing Soviet influence. This also coincides with the U.S. becoming increasingly wary of ArabRead MoreSyria Case Study1238 Words   |  5 PagesFor almost a decade Syria has not enjoyed peace. The war in Syria has polarized countries in the Middle East, Europe and the America. The war has led to countries taking sides depending on the interests of their leaders and the country as a whole. In the process countries from Europe, America and Asia have entered into a union that they deem fit to promote their agendas (G. Friedman 2017). This union is what is now known as the axis 1 geopolitics. Even though the countries may have different individualRead MoreIsis Is A Terrorist Organization Made Up Of Shi1745 Words   |  7 PagesIslamic state in the Middle East. These terrorists go to any extent of violence in hopes of connecting the holy lands throughout Middle Eastern countries. Isis members are fighting for religious purposes hoping to secure land where the Muslim r eligion would dominate. Isis brings danger throughout the world with its political history, the military tactics it employs, and its attraction to foreign members. Isis originated as a group who fought against U.S. forces in Iraq, and later Syria, and were alliesRead MoreRefugees And Republics : Summary1433 Words   |  6 Pagesthe report on Syrian refugees had found paid work. Contrast that with the one in three women who are too afraid or overwhelmed to leave their houses, their isolation and despair palpable: â€Å"I don’t want to leave the house because of the sadness in my heart,† one 70 year old grandmother said. Obviously the circumstances facing the Syrian refugees are greater than the circumstances facing the characters in The Grapes of Wrath, also known as ‘Okies’, due to the greater possibility of death and even largerRead MoreOrigin And Expansion Of Isis Essay1750 Words   |  7 PagesOrigin and expansion of ISIS The origins of ISIS and the factors that led to their extremely accelerated growth in the Middle East. When talking about the origins and expansion of ISIS there are two stories the first is about the men who were behind the start of ISIS and the second is regarding the United States role in accidently aiding the terror group. ISIS is a very smart, advanced, and brutal group who are extremely wealthy and this is why they are growing at an astonishing rate. In modernRead MoreIs Becoming A Politician? Essay1636 Words   |  7 Pagesto do with. This was the situation in the medical unit of the Mrajeeb Al Fhood refugee camp, which was an available safe haven for refugees who were fleeing from the detrimental effects of the war in Syria. This war represented one example of the existing conflict and crisis that was in the Middle East. I witnessed the loss of hope and separation of families by death during my time in this camp, while working as a volunteer. Thus, I came into close contact with the patients in the ward at the campRead MoreIsis Existence Of The Middle East1378 Words   |  6 Pages1A Prof. Kuroki June 17 2015 ISIS existence in the Middle East ISIS is a Salafi group that follows an extreme interpretation of Islam and promotes religious violence. ISIS has been on a running climb to power and control in the Middle East. The rise of Islamic State in Iraq and Syria (ISIS), the Islamist militant group that has took over huge parts of land stretching from northern Syria to central Iraq, and it has struck fear into the hearts of leaders around the world. The main reason ISIS isRead MoreThe Middle East Is Crumbling, And America Is At Fault1007 Words   |  5 Pages The Middle East is Crumbling, and America is at Fault For years civilians have died at the hands of a cruel and what seems to be an unending war. Every day hundreds are killed by bombs, air strikes, or guns and survival has become their only concern. The conflict in the Middle East started to become worse during the Arab Spring when civilians in many countries started to rebel against their governments, ultimately leading to the formation of rebel groups. Groups such as ISIS emerged, resultingRead MoreThe Culture Of The Middle East1476 Words   |  6 PagesIt is noted that every Middle Eastern Country are publicly fascinated of the Dabke dance. Each of the Middle Eastern nation claims they are the best at dancing Dabke. They also claim to have to have invented the dance (Hussein, 2016). However, there is the truth and reality behind the dance. Dabke is also referred to as Dabka or even Dabkeh. It is those names that the Middle Eastern people refer to the actual dance that is normally used by different dialect. The dance is universal ir respective ofRead MoreThe New Arabs By Juan Cole1096 Words   |  5 PagesThe Arab world seemed to have been poised for an era of political and cultural renewal. The 2011 uprisings that toppled long-reigning dictators inspired hope to those within the region and the rest of the world that change may finally come to the Middle East. Like many eager journalists and intellectuals during the Arab Spring, Juan Cole, a history professor at the University of Michigan and a popular political blogger, had high hopes. â€Å"A new generation has been awakened,† Cole writes in his latest

Anxiety Disorders Essay Example For Students

Anxiety Disorders Essay Anxiety is a normal reaction to a threatening situation and results from an increase in the amount of adrenaline from the sympathetic nervous system. This increased adrenaline speeds the heart and respiration rate, raises blood pressure, and diverts blood flow to the muscles. These physical reactions are appropriate for escaping from danger but when they cause anxiety in many situations throughout the day, they may be detrimental to a normal lifestyle. An anxiety disorder is a disorder where feelings of fear, apprehension, or anxiety are disruptive or cause distortions in behavior, (Coon, 526); they are psychiatric illnesses that are not useful for normal functioning. At times, an underlying illness or disease can cause persistent anxiety. Treatment of the illness or disease will stop the anxiety. Anxiety illnesses affect more than 23 million Americans with about 10 million Americans suffering from the most common, general anxiety disorder . (Harvard, 1). Common anxiety disorders are panic attacks (panic disorder), phobias, and general anxiety disorder (GAD). Panic attacksPanic attacks can begin with a feeling of intense terror followed by physical symptoms of anxiety. A panic attack is characterized by unpredictable attacks of severe anxiety with symptoms not related to any particular situation. (Hale, 1886). The person experiencing the attack may not be aware of the cause. Symptoms include four or more of the following: pounding heart, difficulty breathing, dizziness, chest pain, shaking, sweating, choking, nausea, depersonalization, numbness, fear of dying, flushes, fear of going crazy. Heredity, metabolic factors, hyperventilation, and psychological factors may contribute to anxiety causing panic attacks. (Hale, 1886)Panic disorder tends to run in families with first degree relatives of patients having four to seven times greater risk than the general population. Metabolically, the levels of three neurotransmitters, nor-epinephrine, gamma-aminobutyric acid (GABA), and serotonin, may play a role in anxiety. These neurotransmitters act as signals between brain cells. Drugs that change the levels of these neurotransmitters are useful in the treatment of anxiety. Hyperventilation (rapid shallow breathing) can cause a decrease in carbon dioxide in the blood. This decrease in carbon dioxide has been associated with anxiety. Anxiety can be caused by psychological factors as well. One theory is that there is an unconscious conflict between certain wishes and desires, and guilt associated with these desires. Another theory is that certain fearful childhood situations provoke anxiety later. This later theory has been associated with agoraphobia in that the fear of being abandoned in the past may lead to fear of public places. Panic disorder is treated with drugs, cognitive- behavior therapy and other forms of psychotherapy, and/or a combination of the two. Relaxation therapy is also used in combination with other treatments. Phobias Phobias are extreme and disabling fear of something that poses little or no danger and leads to avoidance of objects or situations. There are three types of phobias: agoraphobia, social phobia, and specific phobias. (Public Health, 293). People with agoraphobia fear that something extremely embarrassing will happen to them. (Coon, 533). This phobia tends to start between the ages of 15 and 35 and is twice as common in women as in men. Anxiety occurs when the person is in or thinks about being in a place where escape may be difficult or help may not be available. The condition is managed with behavioral techniques such as exposure therapy and it is believed that these techniques may be more effective than drug therapy. Social phobia is a fear of being the focus of attention or scrutiny or of doing something extremely humiliating. Patients are afraid that others will think they are stupid, weak or crazy. Anxiety can occur from exposure to a particular situation or the mere thought of being in the situation. People with social phobias realize that their fears are irrational but they still experience the dread and anxiety. Treatment consists of cognitive-behavior therapy or medication or a combination of the two. (Pamphlet, 5-6). .u1012a4bb5ce54297f3886614ee3860e5 , .u1012a4bb5ce54297f3886614ee3860e5 .postImageUrl , .u1012a4bb5ce54297f3886614ee3860e5 .centered-text-area { min-height: 80px; position: relative; } .u1012a4bb5ce54297f3886614ee3860e5 , .u1012a4bb5ce54297f3886614ee3860e5:hover , .u1012a4bb5ce54297f3886614ee3860e5:visited , .u1012a4bb5ce54297f3886614ee3860e5:active { border:0!important; } .u1012a4bb5ce54297f3886614ee3860e5 .clearfix:after { content: ""; display: table; clear: both; } .u1012a4bb5ce54297f3886614ee3860e5 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u1012a4bb5ce54297f3886614ee3860e5:active , .u1012a4bb5ce54297f3886614ee3860e5:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u1012a4bb5ce54297f3886614ee3860e5 .centered-text-area { width: 100%; position: relative ; } .u1012a4bb5ce54297f3886614ee3860e5 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u1012a4bb5ce54297f3886614ee3860e5 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u1012a4bb5ce54297f3886614ee3860e5 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u1012a4bb5ce54297f3886614ee3860e5:hover .ctaButton { background-color: #34495E!important; } .u1012a4bb5ce54297f3886614ee3860e5 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u1012a4bb5ce54297f3886614ee3860e5 .u1012a4bb5ce54297f3886614ee3860e5-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u1012a4bb5ce54297f3886614ee3860e5:after { content: ""; display: block; clear: both; } READ: The nursing field EssayMany people experience specific phobias intense, irrational fears of certain things. Some of the more common specific phobias are dogs, closed-in places, heights, tunnels, bridges, and flying. Specific phobias tend to run in families and are more common in women. They strike more than one in ten peole and no one knows just what causes them. Important career or personal decisions may be affected by a persons specific phobia but many of the feared things are easily avoidable and help is not sought. Treatment employs desensitization or exposure therapy and is beneficial in three-fourths of patients. There are currently no drugs recommended for specific phobias however, certain medications may be prescribed to help relieve anxiety symptoms. Relaxation and breathing exercises are also helpful. General anxiety disorder (GAD) GAD affects two to five percent of the general population, but it accounts for almost 30% of psychiatric consultations in general practice. GAD is chronic or exaggerated worry and tension. Worrying is often accompanied by physical symptoms like trembling, muscle tension, headache and nausea. People with GAD cant seem to shake their concerns, seem unable to relax, have trouble falling or staying asleep, or feel lightheaded or out of breath. Some individuals startle more easily than other people, tend to feel tired, have trouble concentrating, and sometimes suffer depression. (Pamphlet, 2). Although GAD is the most common anxiety disorder, it is the least understood. It affects people of both sexes and all ages but is diagnosed more frequently in women than in men. The diagnosis of GAD is chronic, exaggerated worry and tension that has lasted for more than six months, although most people with the disorder can trace it back to childhood or adolescence. (Harvard, 2). Only 25% of people with the disorder seek professional care leaving millions of sufferers to go without simple treatments which can make a great difference. (Wickelgren, 56). Treatment consists of a mixture of medication and counseling, finding the most useful combination for each patient. Anxiety disorders can be confused with stress reactions. Stress reactions may have anxiety as a primary feature and include rapid response to sudden stressful life events, leading to disorientation, and adjustment reactions slower responses to life events that occur days or weeks later as symptoms of anxiety, irritability, and depression. These are usually limited and helped by reassurance, ventilation, and problem solving. Anxiety disorders oftentimes cannot be linked to specific life events and persist for months if not years at a time. Many people with anxiety disorders can be helped with treatment. Most of the medications which are prescribed are started at low doses and tapered off when treatment is near an end. Side effects generally become tolerated or diminished with time. Behavioral therapy and cognitive-behavioral therapy can be effective for treating several of the anxiety disorders. Behavioral therapy focuses on changing specific actions and uses different techniques to alter unwanted behavior. Techniques include special breathing exercises and exposure therapy gradually exposing patients to what frightens them and helps them cope with their fears. Cognitive-behavioral therapy teaches patients to react differently to the situations and bodily sensations that trigger panic attacks and other anxiety symptoms. Patients also learn to understand how to change their thoughts so that symptoms are less likely to occur. These techniques are designed to help people confront their fears. Without treatment, anxiety d isorders can be extremely disabling and disrupt family, work and social relationships. Psychology Essays

Essay Examples on Argentina Essay Example

Essay Examples on Argentina Paper 1st Essay Sample on Argentina Following independence from Spain on July 9, 1816, Argentina experienced periods of internal political conflict between conservatives and liberals and between civilians and the military.After World War II, a long period of supreme rule and interference in subsequent governments was followed by a military junta that took power in 1976. Democracy returned in 1983, and numerous elections since then have underscored Argentinas progress in democratic consolidation. The Argentine constitution of 1853 was modeled after that of the United States. Certain parts of its preamble reflect the ideals and aims of the United States constitution.The President and vice president each serve for a single six-year term.Under the constitution, the provinces of Argentina elect their own governors and legislatures.During periods when the constitution has been suspended, provincial governors have been appointed by the central government.Federal courts include the supreme court, seventeen appellate courts, a nd district and territorial courts on the local levels.The provincial court systems are similarly organized, consisting of supreme, appellate, and lower courts.According to the constitution of 1853, Argentina is a federal republic headed by a president, who is assisted by a council of ministers.Legislative powers are approved in a national congress consisting of a Senate and a House of Deputies.All constitutional provisions were suspended in 1966 following a military takeover. Since Argentina is located in the Southern Hemisphere, summer extends from December to March and winter is from June through September.In mountainous regions and destinations further south, average daytime temperatures can be noticeably colder.The north however has pleasant arid and subtropical climates. 2nd Essay Sample on Argentina Argentina is the second largest country in South America and is the eighth largest in the world. It is located in the southern most part of South America, and it is bordered by Bolivia and Paraguay to the north; Uruguay, Brazil, and the Atlantic Ocean to the east, and the Atlantic Ocean and Chile to the west and south. The total surface area of Argentina is about 1. 1 million square miles and 1. 1 percent of this area is water. It is about 2,300 miles long from north to south, and almost 870 miles from east to west. The highest point is located in the province of Mendoza, which is the Cerro Aconcagua Mountain. This is the highest mountain in the America’s, and it is about 22,834 feet tall. The lowest point of Argentina is the Laguna del Carbon Lake in the Santa Cruz province, which is 344 feet below sea level. This is also the lowest point in South America. We will write a custom essay sample on Essay Examples on Argentina specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Essay Examples on Argentina specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Essay Examples on Argentina specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The four main regions of Argentina are the fertile plains of the Pampas in the central part of the country, the plateau of Patagonia in the southern part down to Tierra del Fuego, the subtropical northern area of the Gran Chaco, and the rugged Andes Mountain range along the western border with Chile. The fertile Pampas have great agriculture and cattle grazing, the region of Patagonia is cool, with wooded and fertile areas, and the Gran Chaco region, is swampy and partly wooded. Argentina Argentina Argentina Some of the major rivers in Argentina are the Paraguay, Bermejo, Colorado, Uruguay, and Parana. Of these five main rivers, the Parana River is the largest. Rivers such as the Uruguay and the Parana join together to form the estuary of the Rio de la Plata before reaching the Atlantic Ocean. The main lakes include the Argentino and Viedma in Santa Cruz, Nahuel Huapi between Rio Negro and Neuquen, and Fagnano in Tierra del Fuego. The weather in Argentina is fairly diverse.

Act One Plot Summary of Pygmalion

Act One Plot Summary of Pygmalion George Bernard Shaw wrote over forty plays during the course long life of 94 years. Pygmalion, written in 1913, became his most famous work. Check out our article on Shaws biography to learn more about his life and literature. Quick Synopsis Its the tale of a conceited professor of linguistics, Henry Higgins, and the brash, incorrigible young woman named Eliza Doolittle. Higgins sees the cockney girl as a great challenge. Can she learn to speak like a refined English lady? Higgins endeavors to transform Eliza in his own image, and he gets much more than he ever bargained for. Pygmalion in Greek Mythology The title of the play is derived from ancient Greece. According to Greek Mythology, Pygmalion was a sculptor who created a beautiful statue of a woman. The gods grant the artist a wish by making the sculpture come to life. The main character in Shaws play is not a sculptor; however, he does become enamored with his own creation. Plot Summary of Act One Professor Henry Higgins wanders the streets of London, absorbing the local color and studying the various dialects those around him. A crowd of people huddle together, due to the sudden downpour of rain. A wealthy woman tells her adult son, Freddy to hail a taxi. He complains but obeys, bumping into a young woman selling flowers: Eliza Doolittle. She asks a man to buy flowers from her. He declines, but gives her spare change, for charitys sake. Another man warns Eliza that she should be careful; a stranger has been writing down every word she has been saying. The stranger is Prof. Henry Higgins who reveals his shorthand notes. She is distressed, thinking that she is in trouble. Henry rebukes her: HIGGINS: Dont be ridiculous. Whos hurting you, you silly girl? The crowd gives Higgins a hard time when they realize he is a gentleman instead of a policeman. At first, the citizens are quite concerned about the poor flower girl. Eliza expresses her distress (and reveals the nature of the crowd) in the following quote and subsequent stage direction: ELIZA: I aint done nothing wrong by speaking to the gentleman. Ive a right to sell flowers if I keep off the kerb. (Hysterically) Im a respectable girl: so help me, I never spoke to him except to ask him to buy a flower off me. (General hubbub, mostly sympathetic to the flower girl, but deprecating her excessive sensibility. Cries of Dont start hollerin. Whos hurting you? Nobodys going to touch you. Whats the good of fussing? Steady on. Easy, easy, etc., come from the elderly staid spectators, who pat her comfortingly. Less patient ones bid her shut her head, or ask her roughly what is wrong with her. (...) The flower girl, distraught and mobbed, breaks through them to the gentleman, crying mildly.) Oh, sir, dont let him charge me. You dunno what it means to me. Theyll take away my character and drive me on the streets for speaking to gentlemen. Prof. Higgins listens to peoples accents and cleverly recognizes where they are from and where they have been. The crowd is both impressed and perturbed at his uncanny abilities. The rain stops and the crowd disperses. Colonel Pickering, the man who gave Doolittle spare change, is intrigued by Higgins. The professor explains that he can identify a persons origins based solely on phonetics, the science of speech. Meanwhile, Eliza is still nearby, sulking and muttering to herself. Higgins complains that the flower girls speech is an insult to the majestic English language. Yet he also boasts that he is so skilled in phonetics that he could train her to speak like royalty. Pickering reveals his name, explaining that he has written a book on Indian dialects. By coincidence, Higgins had been hoping to meet the distinguished Colonel, just as Col. Pickering had been hoping to meet Higgins. Delighted by their chance encounter, Higgins insists that Pickering stay at his home. Before they leave, Eliza begs them to buy some of her flowers. Higgins drops a large amount of coins into her basket, amazing the young woman who very likely has never paid so much. She celebrates by taking a taxi cab home. Freddy, the wealthy young man who originally hailed the taxi says Well, Im dashed, in response to the flower girls confident attitude.

English Pronunciation Exercises - U Sounding Vowels

English Pronunciation Exercises - U Sounding Vowels The following series of pronunciation exercises combines words beginning with the same consonant sound followed by similar vowel sounds. Voiced and voiceless consonants are paired (b - voiced / p - voiceless, d - voiced / t - voiceless, etc.) to help students compare and contrast similar consonant formation.   Repeat each line slowly, listen for the minor differences between the vowel and consonant sounds.Repeat each line three times. Each time repeat more quickly trying to keep the sounds distinct.Find a partner and listen to each other repeat the lines.Try to invent sentences using each sound at least once. For example, The butcher put on his boots but he forgot his hat.   Dont worry too much about the sentence making much sense! long uh as in put short uh as in up oo as in shoe butcher but boot put pup poof! duh duck do Tokay tough tooth good gulp Google cook cup cool soot supper suit Zeus Wazup? zoom shook shut shoot jut jump June churn Chuck choose hook hub who Sentences to Practice with Minimal U Sounds B - The butcher wanted to cook, but he forgot to wear the right boots. P - My teacher put the pup into the magic circle and it went poof! D - Duh! I shouldnt have let the duck do the dishes this evening. T - If you think the Tokay was OK, youll find the Chardonnay tough on the tooth. G - Just gulp your beer, and youll be good enough to Google the answers on the quiz. C - The wonderful cook cooled the cup of tomato soup before he served it.   S - The man walked in and shook the soot off of his suit before he sat to supper.   Z - Zeus said wazup to Thor as he zoomed through the Greek heavens.   SH - The boy wanted to shoot the kid who had shook him and told him to shut up. J - He jut his chin out and jumped into the air on a beautiful day in June. CH - Chuck told the students that they should choose carefully, and not churn through the mess. H - Janes mom, who was the hub of gossip in town, hooked everyone into something.    Vowel Sounds eh - as in let, ih - as in hit, ee - as in see, and ae- as in catlong ah - as in car, short ah - as in gotlong uh - as in put, short uh - as in up, oo - as in through Diphthong Sounds ay - as in day, ai - as in skyou - as in home, ow - as in mouse, oi - as in boyieh(r) - as in near, ehi(r) - as in hair

Micro Economics in the Real World Term Paper Example | Topics and Well Written Essays - 1000 words

Micro Economics in the Real World - Term Paper Example The unrestricted mobility of resources and factors of production has made the unbalanced economic performance worse as the developed countries control and regulate economic activities of the lower tier economies at their benefits (Kunz, 56). As reported by the World Bank, the economic performance of India and Germany significantly vary. This can be measured by focusing on GDP, inflation, rate of employment and poverty index. HOW THE GPD OF INDIA COMPARE TO THAT OF GERMANY Being the largest economy in Europe, Germany benefits from a pool of technically gifted labour force, hence her dominance in chemical and machinery industry. GDP which is the key determinant of growth and development is defined as the â€Å"the total market value of all goods and services produced in a country during a given year† The GDP of Germany has been positive over a couple of decades. However, following the 2008-2010 global financial contagion, the steady gross domestic production of Germany significa ntly declined. In the first quarter of 2012, the GDP of Germany increased by 0.5%, while in the second quarter, it increased by 0.3%. Over the same period, government and household expenditure and exports increased. On the contrary, fixed investments reported a decline in real value. Private investment and consumption fell following the Euro financial crisis. Amid the global financial and economic crisis, in 2009 Germany posted purchasing power parity (PPP) of $2.182 trillion (Oecd Economic Surveys: Germany, 23). Even during the recession, Germany’s economy recorded positive returns with its GDP ranking sixth globally. 2009 reported the worst economic performance for Germany after posting a GDP of -5%. The economic growth rate and development (2007-2009) are as graphically represented above. Over the same period (2007-2011), India’s economy posted a positive return with a 5.5% GDP in 2011 and 4.1% in 2007. A report by the KPMG’s executive in India stated,  "Whether it (GDP growth) is 5-5.5 per cent or 7-8 per cent, the most important part is that the country is still growing. If you look at the rest of the world...India is still growing at 5-5.5 per cent, it’s a slower growth but it’s a growth† (Kajal, and Moore, 67) In the first quarter of 2012, the performance of the Indian economy slipped because of decline in mining, quarrying, and manufacturing sectors. This performance was much better than that of the world’s largest economy, United States which posted an economic growth of approximately 1.5% in the gross domestic production (Oecd Economic Surveys: Germany, 87). Measured in purchasing power parity (PPP), the GDP of India was US $2.996 trillion during the 2008 financial period. In official exchange rates, this represented $1.099 trillion. The real economic growth rate for 2008-2009 was approximated to be 9%. INFLATION RATE IN GERMANY AND INDIA Inflation is the persistent rise in the general price level of goods and services in economy measured as a proportion of the base period records. Inflation is measured using the consumer price index (CPI), which is the critical indicator of inflation. It therefore represents the changes in retail prices of commodities for a specific consumer basket. It is the measure of the purchasing power of the local

Macro economics Essay Example | Topics and Well Written Essays - 750 words

Macro economics - Essay Example 9.7 %. The declined level of disposable income would result in slowing down of the consumption rate as well. Higher disposable incomes are prerequisite to boost the economy of a country. This is because higher level of disposable income facilitates to augment consumption and greater rate of consumption in turn leads to enhanced spending which is necessary for economic development (Orlik and Davis, â€Å"China Falters in Effort to Boost Consumption†). RETAIL SALES Chinese retail sales have been lowered to 12.7% in the first half of 2013 against the impressive rate of 14.4 % on YoY (Year-on-Year basis) in 2012 (Orlik and Davis, â€Å"China Falters in Effort to Boost Consumption†). ECONOMIC GROWTH Chinese economic growth also decelerated to 7.5% in the second quarter of 2013 against the previous year’s rate. Apart from the Chinese economic growth rate, this article revealed the growth rate related to the United States. The QoQ (Quarter on Quarter) annualized basis g rowth rate related to the United States came out as 6.9% in 2013 which is slightly up from the previous year’s (2012’s) growth rate i.e. 6.6%. However, this rate was far below than the government target growth rate i.e. 7.5% (Orlik and Davis, â€Å"China Falters in Effort to Boost Consumption†). INFRASTRUCTURE The article has revealed that the new residential properties under construction in China have grown to 2.9 % YoY basis in the first half of the year 2013. It also revealed the fact that the real estate prices in China especially in the cities such as Beijing as well as Shenzhen have grown by double-digit (Orlik and Davis, â€Å"China Falters in Effort to Boost Consumption†). 2. GOVERNMENT ROLE IN THE ECONOMY Government plays a vital role towards the economic development of a country. Government roles involve developing various economic policies for the country, defending the nation’s borders, operating courts and legal systems. Government pla ys an important role to regulate tax system of the country along with investing capital for developing various infrastructures within the country. Government has three major roles in the economy. Firstly, it establishes and upholds various property rights. Secondly, it offers nonmarket mechanism for allotting limited resources and thirdly it implements provisions that redistribute wealth and income (Parkin 371-372). In case of Chinese economy as well, the government has strived to take certain measures in terms of preparing economic restructuring plan through laying its focus on investment related to ensuring energy efficiency along with information technology. It has also encouraged different institutions to provide lending to the country’s smaller sized organizations (Orlik and Davis, â€Å"China Falters in Effort to Boost Consumption†). 3. IMPRESSIONS DERIVED FROM THE ARTICLE The article i.e. â€Å"China Falters in Effort to Boost Consumption† published in Th e Wall Street Journal provides an explanation to the latest economic developments in China. It has revealed vital facts relating to the growth rate of China with regard to various fields especially unban household. Beijing’s plan to cut focus on undependable exports also creates a hindrance to growth as urban households level of disposable incomes reduces. Initial part of the article discloses various in

Beryls Chocolate Essay Example for Free

Beryls Chocolate Essay Chocolate is a key ingredient in many foods such as milk shakes, candy bars, cookies and cereals. Chocolate is a processed delicacy made from the beans of the cocoa tree. The cocoa tree, native to the tropical Amazonian forests, is an evergreen tree of the cola family. Chocolate is a mixture of roasted cocoa, cocoa butter, and very fine sugar. Unsweetened or called bitter chocolate is available in squares and is the natural rich chocolate ground from the cocoa beans. It has a full-bodied flavor and is ideal for baking and cooking. Sweetened chocolate and chocolate with various other ingredients are also increasingly available. As we know, the type of chocolate refers to three types which is milk chocolate, plain chocolate and white chocolate. History Of Chocolate The Timeline 2000 BC, Amazon: Cocoa, from which chocolate was created, was said to have originated in the Amazon at least 4,000 years ago. Sixth Century AD: Chocolate, derived from the seed of the cocoa tree, was used by the Maya Culture. Maya called the cocoa tree cacahuaquchtl †¦ ‘tree’, and the word chocolate came from the Maya word xocoatl which means bitter water. 1200, Aztec Culture: The Aztecs attributed the creation of the cocoa plant to their god. In both the Mayan and Aztec cultures cocoa was the basis for a thick, cold, unsweetened drink called xocoatl†¦ believed to be a health elixir. Since sugar was unknown to the Aztecs, different spices were used to add flavor, even hot chili peppers and corn meal were used! Aztecs believed that wisdom and power came from eating the fruit of the cocoa tree, and it had nourishing, fortifying, and even aphrodisiac qualities. The Aztec emperor, Montezuma drank thick chocolate dyed red. The drink was so prestigious that it was served in golden goblets that were thrown away after only one use. 1502, Columbus landed in Nicaragua: On his fourth voyage to America, Columbus landed in what is now called Nicaragua. He was the first European to discover cocoa beans being used as currency, and to make a drink, as in the Aztec culture. 1513, A slave was bought for Beans: Hernando de Oviedo y Valdez reported that he bought a slave for 100 cocoa beans. It was at this time, the name of the drink changed to chocolatl from the Mayan word xocoatl and the Aztec word for water, or warm liquid. 1519, Hernando Cortez began a Plantation: Hernando Cortez conquered part of Mexico had a vision of converting the beans to golden doubloons. While he was fascinated with Aztecs bitter, spicy beverage [he didn’t like the cocoa drink], he was much intrigued by the beans’ value as currency. Later, Cortez established a cocoa plantation in the name of Spain. 1528, Chocolate Arrived in Spain: Cortes presented the Spanish King, Charles V with cocoa beans from the New World and the necessary tools for its preparation. And no doubt Cortes taught him how to make Chocolate. 1544, Dominican Friars Got into the Swing: Dominican friars brought a delegation of Mayans to meet Philip. Spanish monks, who had been consigned to process the cocoa beans, finally let the secret out. It did not take long before chocolate was acclaimed throughout Europe as a delicious, health-giving food. The beans were still used as currency. 200 beans bought a turkey cock. 100 beans was the daily wage of porter, and would buy a hen turkey or a rabbit. 3 beans could be traded for a turkey egg, a new avocado, or a fish wrapped in maize husks. 1 bean bought a ripe avocado or tomato. 1657, even London succumbs: Londons first chocolate shop was opened by a Frenchman. London Chocolate Houses became the trendy meeting places where the elite London society savored their new luxury. The first chocolate house opened in London advertising this excellent West India drink. 1674, Eating solid Chocolate was introduced in the form of chocolate rolls and cakes, served in chocolate emporiums. 1704, The Germans imposed a Tax on Chocolate: Chocolate made its appearance in Germany, and Frederick I of Prussia reacted by imposing a tax. Anyone wishing to pay homage to its pleasures had to pay two thalers for a permit. 1765, First Chocolate factory in the USA: The production of chocolate proceeded at a faster pace than anywhere else in the world. It was in pre-revolutionary New England. 1800, Chocolate was an Industry: Antoine Brutus Menier built the first industrial manufacturing facility for chocolate. 1819, the pioneer of Swiss chocolate-making, Francois Louis Callier, opened the first Swiss chocolate factory. 1828, The Cocoa Press was invented by Conrad Van Houten: The Press helped to improve the quality of the beverage by squeezing out part of the cocoa butter. Drinking chocolate had a smooth consistency and a more pleasing taste. 1830, The Drink Became a Confection: Solid eating chocolate was developed by J. S. Fry and Sons, a British chocolate maker. 1849, Cadbury Brothers Exhibited Chocolate: The exhibition was at Bingley Hall at Birmingham, England. 1851, Marked a First for Americans: Queen Victoria’s husband, Prince Albert orchestrated The Exposition in London. It was the first time citizens of the United States were introduced to bonbons, chocolate creams, hard candies (called boiled sweets), and caramels. 1875, Milk Chocolate Came of Age: After eight years of experimentation, Daniel Peter from Switzerland put the first milk chocolate on the market. 1879, Chocolate Literally Melts in Your Mouth: Rodolphe Lindt of Berne, Switzerland, invented conching, a means of heating and rolling chocolate to refine it. After chocolate has been conched for 72 hours and more cocoa butter added to it, chocolate became fondant and melted in mouth! 1913, A new Star is Born: Jules Sechaud of Montreux of Switzerland introduced the process for filling chocolates. 1923, The CMA was established: The Chocolate Manufacturers Association of the United States of America (CMA) was organized. 1925, Cocoa is Big Business: The New York Cocoa Exchange, located at the World Trade Center, was begun so that buyers and sellers could get together for transactions. 1938, World War II: The U. S. government recognized chocolates role in the Allied Armed Forces. It allocated valuable shipping space for the importation of cocoa beans which would give many weary soldiers the strength to carry. Today, the U. S. Army D-rations include three 4-ounce chocolate bars. Chocolate has even been taken into space as part of the diet of U. S. astronauts.

Dangerous Abortion Laws Essay -- essays papers

Dangerous Abortion Laws Does the sovereignty of a minor’s body also belong to their legal guardians and mainstream societies views of morality? The only answer to this question is absolutely not. Currently 28 states in the U.S. require parental consent or notification in order for a minor to receive abortion services.(Net 3) This is not a federally mandated law, but if the right-wing religious groups get their way it will become just that.(Net 3) Requiring parental involvement in a minor’s decision to abort is unacceptable due to; personal choice, birth control, and health risk, issues. Although a judicial bypass can over-rule a parental involvement law, a minor must prove either extenuating circumstances or her maturity in this decision.(Net 4) It must be understood that this bypass is not nor will it ever be, an antidote for the terrible consequences a parental involvement law can hold towards a minor. When a minor applies for a judicial bypass a multitude of sources may influence the judge’s ruling. That is if the judge chooses to hear her case. Amongst these influences lurk variants of all kinds. Variants that may encumber the minor’s chances of having her petition approved may include: There are no set guidelines for a judge to follow, therefore personal discretion, bias, religion, and or opinions, may sway the judge to a truly unfair decision.(Net 4) When ruling on a minor’s level of maturity no set criteria designates a judges determinate factors. Having to go through the legal system can prolong a young women’s pregnancy, which in turn increases cost, health risks, and emotional strain. The judicial system is an intimidating infrastructure for most adults.(Net 4) Therefore it imposes a frightening experience for a minor who has already taken so much upon herself in order to obtain an abortion. A severe drawback to judicial bypass is there is absolutely no guarantee of privacy.(Net 4) An excellent example of this occurs quite frequently in small close-knit towns where parental involvement laws are strictly enforced, and shot-gun weddings are used as an alternative to abortion. Judges who handle these situations are often local elected officials,so their decisions may be altered for campaign purposes.(Net 4) In local municipal courts a minor chances of being recognized by someone is all too likely. So a minor’s chances of having her ... ...ential abortion are logically the same as birth control dipensation. 3. Dangerous health risks make laws that may force teens to endure more than they choose or are able to, therefore such laws are never appropriate. Cons: 1. Judicial bypass can make parental involvement laws more feasible. 2. Possible side effects. Bibliography: Work Citation Page 1. Barans, T. â€Å"Women’s Reproductive Self-Determination.† Pro-choice Right to Abortion. (www.wordwiz72.com/choice.html) *(Net 1) 2. Harris R, Yvette. â€Å"Adolescent Abortion.† Society. July-Aug.1997 v34. p20-22. *(Mag 1) 3. â€Å"Health Risks.† March of the Dimes Foundation. (www.noah.cuny.edu/pregnancy/march_of_dimes/pre_preg.plan /teenfact.html) *(Net 2) 4. â€Å"Judicial Bypass.† (www.prochoice.about.com/newsissues/prochoice/msub12.htm) *(Net 4) 5. â€Å"Parental Consent for FamilyPlanning.† APHA Fact Sheet. (www.apha.org/legislative/factsheets/fs10.htm) *(Net 3) 6. â€Å"Republican leaders vow to take quick action on Child Custody Protection Act.† National Right to Life News. June 9,1998. v25. p1. *(Mag 2)

Consumer Resistance to Innovations

Consumer resistance to innovations: the marketing problem and its solutions This article describes the major barriers which create customer resistance to innovations. This understanding is important because of the high rate of new product failure. A major cause for this is consumer resistance, although consumers are pro-innovation. It’s a normal, instinctive response of customers. This article suggests marketing strategies to overcome these barriers. Innovation resistance can appear in customers because it disrupts their established routines and they can be happy with the current status quo.The higher the discontinuity of an innovation, the higher the resistance is likely to be. Also, consumers have their own belief structure. An innovation can conflict with this which can results in resistance. There are various characteristics of innovation resistance. First, there are different groups regarding to the timing of adoption of an innovation (Innovators, Early Adopters, Early Ma jority, Late Majority and Laggards). Second, resistance varies in degree; (1) inertia (they may feel disinclined to adopt the innovation), (2) active resistance, (3) very active resistance.Third, resistance is influenced by the degree of change/discontinuity and/ or the extent to which it conflicts with consumer’s belief structure. There are two kinds of barriers which create consumer resistance. The article gives some explanation how to undo these barriers: 1. Functional barriers Usage barrier: the most common reason for customer resistance to an innovation is that it’s not compatible with existing workflows, practices or habits. The more existing habits have to change, the more the resistance will be. UNDO: develop a systems perspective to market the innovation.The innovating firm has to estimate how its new product will fit into the existing system, by looking at the whole operation. A second strategy is to integrate the innovation into the preceding activity or pro duct. Finally, overcome usage barriers by making the innovation mandatory through government legislation: lawmakers have to say they are convinced that customers will benefit from the innovation. Value barrier: there has to be a good performance-to-price value compared with product substitutes, otherwise there is no incentive for customers to change.UNDO: provide significant performance value over existing alternatives. Second, reduce the manufacturing costs of the innovation and decrease the price of the product. Third, add value to the innovation by successful positioning the product. Risk barrier: every innovation can have potential side effects that cannot be anticipated. Customers will try to postpone the innovation until they can learn more about is. There are 4 main types of risk inherent in an innovation. (1) physical risk: harm to person or property (2) economic risk: the higher the cost, the higher the perceived economic risk. 3) functional risk: customers can worry that t he innovation may not work properly because it’s not been fully tested. (4) social risk: customers can feel scared to face peer ridicule when they adopt the innovation. UNDO: Offer the innovation on a trial basis to potential customers. Second, show testimonials from experts who objectively evaluate the innovation. Third, package the innovation under a well-known name. 2. Psychological barriers Traditional barrier: innovations can create a cultural change for the customer. The more the customer deviate from traditions, the more resistance there can be.UNDO: understand and respect cultural traditions. Second, educate customers/market education. Third, use change agents. Once industry leaders adopt the innovation, the rest will do the same. Image barrier: this is a perceptual problem that arises out of stereotyped thinking. If associations the product class or where its manufactured is unfavorable, there can be created a barrier to adoption. UNDO: Suggest to people that its sil ly to carry such stereotypes and make fun of the image. Second, create a unique image for the product of service (for example using a cowboy theme).Third, associate the innovation with someone/something with a positive public image. Each of these strategies for countering the barrier for innovation may be classified into one of the five types: product strategy, communication strategy, pricing strategy, market strategy and coping strategy. The answer to successful innovation lies in understanding the causes of resistance and cope with these causes. S. Ram & Jagdish N. Sheth (1989) â€Å"Consumer resistance to innovations: the marketing problem and its solutions†, The Journal of Consumer Marketing, Vol. 6 Iss: 2; pp. 5-14

Native American Literature Essay

Native American literature is made up of two different types of literature, the oral traditions and the newer written traditions. From these two types are many different styles that make up the many different tribes of the Native American culture. Storytelling has long been an important aspect of all Native American cultures. It is through storytelling that the Native Americans are able to pass down their traditions and cultural identities. Oral traditions as well as the newer written traditions play an important part in understanding the cultural make-up of a tribe as well as establishing the historical significances of each individual tribe. The oral traditions of a tribe provided the heritage and memories of the tribe. It contained the actions, behaviors, relationships, and practices that encompass the social, economic, and spiritual identities of the people. These stories were related to each generation, keeping intact the beliefs and important aspects of the tribe. Storytellers learn their stories from other storytellers and from experience. Their stories change with the speaker and with time and with circumstance. Each story is told from a subject-position which affects the telling of the story (Leen, 1995). Storytelling is an event in which the people gather and information is shared through orations for both social and educational purposes. The same tale told in different tribes will be significantly different because each tale contains the important beliefs and stylistic differences of the individual tribe. An example of this can be found in the Trickster tales. Throughout just the Plains Indians, the Trickster takes many forms, such as the spider for the Dakota tribe or the coyote for the Kiawa tribe. However, the story or the moral of these stories is often the same, serving to teach or provide information necessary to keep the beliefs of the tribe intact. Oral traditions of storytelling change not only from tribe to tribe but also from generation to generation. Each storyteller will alter or change pieces of the traditional story to allow the stories to continue to captivate and entertain the audience. It is important that each story be relatable to the generation in which it is being told so that the information and histories found within the story will be considered relevant and be remembered. In John Roger’s Return to White Earth he speaks of his mother relating a story to him and his siblings. He writes, â€Å"As Mother talked, we children forgot all about what we were so eager to hear†¦ We listened eagerly to know what would happen next in the story. † (Return to White Earth, p. 56). That movement of stories through generations and the evolving of stories over time thread all the individuals’ experiences together to weave a shared identity. Trying to capture the essence of the oral tradition in written form is a near impossible task. Vizenor tells us, â€Å"Some of these diverse oral narratives have been translated and of course, is that written translation, even when the languages are similar, is not a representation of oral performances, and even the best translations are scriptural reductions of the rich oral nuances† (Native American Literature, 1995, p. 6). It is impossible to recreate the emotional and visual aspects associated with the oral storytelling of the American Indian. When the oral traditions were first written, the white man was usually writing these tales through an interpreter. These written works lost much of their meaning through the translation. Even though the white man had begun to recognize the historical importance of the oral tales of the Native American, they still often viewed them as primitive. With the inability of the white writer to fully understand the traditions, heritage, or social morality found within the tale, many oral traditions were presented as being silly or incredible tales told by an uneducated people. Luther Standing Bear wrote: White men who have tried to write stories about the Indian have either foisted on the public some bloodcurdling , impossible â€Å"thriller†; or if they have been in sympathy with the Indian, have written from knowledge which was not accurate and reliable. No one is able to understand the Indian race like an Indian (My People, The Sioux, p. 33). The definition of Native American literature is closely tied to what people think constitutes the essence of Native American identity. Three views stand out in this highly contested debate: those of legal bloodlines, cultural traditions, and bicultural production. According to the Annenberg Foundation, Native American literature, then: Would be those works written by someone who legally is Native American, regardless of their content or style. A second perspective links Native American identity and literature with the preservation of cultural traditions. Literary critics who rely on this view focus on aspects of â€Å"traditional† Indian culture in contemporary American Indian literature, such as the continuance of oral traditions. A third trend in Native American studies defines American Indian identity and literature not in terms of what it preserves (whether it be blood or culture), but rather as a bicultural mixture of Native and European American people and traditions (Native Voices, 2013). Luther Standing Bear believes that the only true knowledge about Native American’s lives, beliefs, and cultures must come from Native Americans immersed in cultural traditions. He says: The American Indian has been written by hundreds of authors of white blood or possibly by an Indian of mixed blood who has spent the greater part of his life away from a reservation. These are not in a position to write accurately about the struggles and disappointments of the Indian (My People, The Sioux, p. 33). Some Native Americans have argued that since their indigenous cultures have always assimilated aspects of other cultures, even aspects of other Native American cultures, to be Indian is to be bicultural, or multi-cultural. Many American Indians define themselves not primarily as â€Å"Native Americans† but as members of a specific tribe, each with their own separate history and culture, yet still very much Native American. There is a strong belief that the Native American culture is disappearing, being replaced by aspects of other cultures, particularly those of the white man. N. Scott Momaday reflects: Now that I can have her only in memory, I see my grandmother in the several postures that were and hope, having seen many things†¦ I do not speak Kiowa, and I never understood her prayers, but there was something inherently sad in the sound (The Way to Rainy Mountain, p. 63). Even though he relates strongly to his Native American ancestry, Momaday admits that aspects of his own tribe are already lost to him. The Native American literary tradition has multiple layers, encompassing the historical traditions of old while addressing the struggles and inaccuracies found today. Le Anne Howe best addresses the struggles of the Native American to find their place in the literary world as well as the struggle to maintain their own cultural identity within a society that sees them as the minority. She quotes Edward Galeano saying, â€Å"Throughout America, from north to south, the dominant culture acknowledges Indians as objects of study, but denies them as subjects of history. Indians have folklore, not culture, they practice superstitions, not religion, they speak dialects, not languages, they make crafts not arts†¦ † (Mocassins Don’t Have High Heels, p. 202). It is through these thoughts that today’s Native American writers try establish understanding of their people through their works while trying to maintain the cultural traditions of their history, passing them on for the next generations. References Annenberg Foundation. (2013). Native Voices. http://www. learner. org/amerpass/unit01/pdf/unit01ig. pdf retrieved August 19, 2013 Howe, Le Anne. (1995). Moccasins Don’t Have High Heels. Native American Literature. A Brief Introduction and anthology. New York, NY: Addison-Wesley p. 199 Leen, M. (1995). An art of saying: Joy Harjo’s poetry and the survival of storytelling. American Indian Quarterly,19(1),http://search. ebscohost. com. ezproxy. apollolibrary. com/login. aspx? direct=true&db=lkh&AN=9508220366&site=ehost-live retrieved August 19, 2013 Luther Standing Bear, (1928) My People, The Sioux. Native American Literature. A Brief Introduction and anthology. New York, NY: Addison-Wesley p. 33 Momaday, N. Scott. (1969). The Way to Rainy Mountain.

What features of Cloudstreet contribute to its textual integrity Essay Example

What features of Cloudstreet contribute to its textual integrity Essay Example What features of Cloudstreet contribute to its textual integrity Essay What features of Cloudstreet contribute to its textual integrity Essay Essay Topic: Literature True Grit Cloudstreet, written by Tim Winton, has all the requirements and qualities of a text with textual integrity. Textual integrity consists of structure, form and language which create a meaning. Cloudstreet is a family saga which employs a generally linear and sometimes circular structure. It meets the criteria of a saga in two ways. Firstly, it takes place over 4 generations, and even though the oldest generation is only embodied through memories and dreams it does help the narrative achieve resolution by bringing the reader closer to the Cloudstreet characters. Secondly the novel takes place over 25 years and speaks of events that actually took place in the time the novel was set; WWII, Nedlands Murders. Through Wintons use of chapters and sub headings the readers do not notice time passing but the important details instead. The structure is mostly linear but there are times which incorporate flashbacks or are in dream-mode. These modes are important for the reader to fully understand each character and their way of thinking. It is important that past events be recognised as they are an essential part of the story. Such is when Quick is out shooting roos and Fish comes to him in a Harvey oranges box with tomato stakes for oars. Across the still waters of the sunburnt crop wherein lies Quick Lamb breathing without help He took my bloody dog (page 201). This shows that the water essence is always with each character. The fact that the house was originally inhabited by Indigenous girls who subsequently were abused, helps the reader to understand why Spiritual Fish hears the house breathing and crying and how he talks to dark ghosts. All of Wintons characters are restless and seek meaning in a world where an explanation isnt easy to find. Their dialogue defines their class of people; the characters use idioms like carn in place of come on and the recognisable events such as the Nedlands Murders give the text, textual integrity. Winton creates viable, believable and realistic characters by using dialogue, specific language techniques and point of view. Winton uses multiple narrators; Omniscient, stream of consciousness (Fish, Oriel) and interior monologue (Rose, Lester). Its Fishs spiritual narration that lets the reader in on otherwise inaccessible information which is unattainable from the other often inarticulate characters. Inarticulateness, Australian vernacular and alcoholism, were Australian traits evident in many novels and plays written about Post-War Australia such as The Touch of Silk by Betty Roland and Summer of the Seventeenth Doll by Ray Lawler. This shows Cloudstreet was a true depiction of Post-War, poorly educated, working class, Aussie battlers and shows its viability and textual integrity. Winton enhances the textual integrity of his novel by giving the characters distinctly Australian qualities and they fit the Western Australian war time period they are placed in. The characters are all laconic and use colloquialisms such as that on page 399; Lon Lamb has taken a sickie off work Dolly is sarcastic and cynical. When Sam lost his fingers all Dolly could say was; His bloody working hand. A man could hardly pick his nose with a thumb and half a pointer. They were done for; stuffed, cactus. Thank you, Lady Luck, you rotten slut. Wintons Characters carefully chosen names evoke an image into the readers mind of what the character should be. These ideas are immediately vanquished. Take Rose, a rose is a delicate flower with fine features and a beautiful aura but Rose Pickles is a hateful woman, though beautiful she is spiteful and hard. Dolly is just like her daughter, in that she is hardened. Dolly is also an alcoholic and sex-crazed woman who spends most of her time at the pub drinking and vying for male attention. These two strong women contradict their pleasant names and also hate each other. Fish, like the creatures, observe the immeasurable depths of experience and all he can think about is the river. The surnames of the two Cloudstreet families are Pickles and Lamb. A club sandwich with so many characteristics all piled under the same roof of Cloudstreet. Cloudstreet is written using a paradox. Although Fish is intellectually disabled he is the main narrator in the book. Once favourite, who after the accident became stuck somewhere like hes half in and half out. Not all of Fish had come back and in his half state of life hes become a spiritually liberated and insightful being. His refusal to acknowledge his mothers presence is ironic because it if wasnt for her stubborn and sheer will power Fish would never have come back at all. Winton uses symbolism and themes (the black man, house and river) as a central part of Cloudstreet, especially the river. All the major life changing events take place at the river; Fish drowns then gets brought back to life, Rose and Quick acquaint themselves, Quick and his mother open up to each other and then finally Fish dies there. The setting has been given life by Winton as he explores Australia. He uses personification to show a connectedness between humanity and the land. He also uses personification when he writes about the house that moans and groans with the lost souls of the indigenous Australians. The house along with the river is the place where everything starts and finishes (circular structure). The house brings the two families together and its the place where the two families really are brought together when Quick and Rose make love to each other and Dolly and Lester have sex. Fish also understands the room that nobody else can bear to enter. He hears the house crying at night and he feels its pain. Winton also in a way personifies the pig. There is no real reason for the pig except comical relief but Fish understands it, for its his spiritual side that allows this. The pig speaks in its own tongue much like the Glossolalia of Pentecost in the New Testament. Another biblical reference. Cloudstreet has many biblical over-tones such as: The Lambs are believers in the bible, Beryl, and even a sub heading, Disciples on page 247 relates to the bible. Another theme Winton explores is women and men in this time. Australia was a male centred society and the values of women were restricted to their sexuality and ability to be nurturers. Dolly and Oriel have opposing views about the men in their lives. Dolly desires the mens attention where Oriel battles through life despite men. The women are the rock in the unstable lives of their families, they shape the children, and men and make everything function while the men create predicaments and problems. Oriel and Dolly; however different their views, are the symbols of the plight of women in a manly world. Beyond Cloudstreet lies a world that is male orientated, where within the walls of their home, everything is shaped by women. The men live in their past and memories and are largely unaware of the real world around them. E. G: Lester relieves his glories at the ANZAC club. Although when an emergency arises, the men find the answers because they are spur-of-moment characters. Such is when Lester lends Sam money for his debt. The men may be good with physical encounters but they make themselves scarce for emotion catastrophes. Cloudstreet has textual integrity. It does not chop and change its ideals throughout the novel and its main themes stay the same. Everything Cloudstreet entails is true and viable. There is no doubt that Cloudstreet has textual integrity.

Learn About NASAs Pathfinder Mission to Mars

Learn About NASAs Pathfinder Mission to Mars Meet Mars Pathfinder The Mars Pathfinder was the second of NASAs low-cost planetary Discovery missions to be launched. It was an ambitious way to send a lander and a separate, remote-controlled rover to the surface of Mars and demonstrated a number of innovative, economical, and highly effective approaches to spacecraft and mission design of a planetary landing mission. One reason it was sent was to show the feasibility of low-cost landings at Mars and eventual robotic exploration.   Mars Pathfinder was launched on a Delta 7925 on December 4, 1996. The spacecraft entered the Martian atmosphere on July 4, 1997 and took atmospheric measurements as it descended. The entry vehicles heat shield slowed the craft to 400 meters per second in about 160 seconds. A 12.5-meter parachute was deployed at this time, slowing the craft to about 70 meters per second. The heat shield was released 20 seconds after parachute deployment, and the bridle, a 20-meter-long braided Kevlar tether, deployed below the spacecraft. The lander separated from the back shell and slid down to the bottom of the bridle over about 25 seconds. At an altitude of about 1.6 kilometers, the radar altimeter acquired the ground, and about 10 seconds before landing four air bags inflated in about 0.3 seconds forming a 5.2-meter-wide diameter protective ball around the lander. Four seconds later at an altitude of 98 meters the three solid rockets, mounted in the backshell, fired to slow the descent, and the bridle was cut 21.5 meters above the ground. That released the airbag-encased lander, which dropped to the ground. It bounced about 12 meters into the air, bouncing at least another 15 times and rolling before coming to rest approximately 2.5 minutes after impact and about a kilometer from the initial impact site. After landing, the airbags deflated and were retracted. Pathfinder opened its three metallic triangular solar panels (petals) 87 minutes after landing. The lander first transmitted the engineering and atmospheric science data collected during entry and landing. The imaging system obtained views of the rover and immediate surroundings and a panoramic view of the landing area. Eventually, the landers ramps were deployed and the rover rolled onto the surface.   The Sojourner Rover The Pathfinders rover Sojourner was named  in honor of Sojourner Truth, a 19th-century abolitionist and champion of womens rights. It operated for 84 days, 12 times longer than its designed lifetime of seven days. It investigated rocks and soil in the area around the lander.   The bulk of the landers task was to support the rover by imaging rover operations and relaying data from the rover to Earth. The lander was also equipped with a meteorology station. Over 2.5 meters of solar cells on the lander petals, in combination with rechargeable batteries, powered the lander and its onboard computer. Three low-gain antennas extended from three corners of the box and a camera extended up from the center on a 0.8-meter high pop-up mast. Images were taken and experiments performed by the lander and rover until 27 September 1997 when communications were lost for unknown reasons. The landing site in the Ares Vallis region of Mars is at 19.33 N, 33.55 W. The lander has been named the Sagan Memorial Station, and it operated nearly three times its design lifetime of 30 days. Pathfinders Landing Spot The Ares Vallis region of Mars is a large flood plain near Chryse Planitia. This region is one of the largest outflow channels on Mars, the result of a huge flood (possibly an amount of water equivalent to the volume of all five Great Lakes) over a short period of time flowing into the martian northern lowlands. The Mars Pathfinder mission cost approximately $265 million including launch and operations. Development and construction of the lander cost $150 million and the rover about $25 million. Edited and updated by Carolyn Collins Petersen.

Privatization of Prisons Essay Example | Topics and Well Written Essays - 750 words

Privatization of Prisons - Essay Example Private prisons purpose was to house inmate thus reduce congestion in public prisons then paid by the government using taxpayer prison revenue. Despite privatization being profit generation source, private prisons have benefits and disadvantages to the public and prisoners. As a result, the essay will deduce and come up with the judgment on whether the government should embrace private prisons or abolish the idea. Positively, private prisons reduce congestion of prisoners in public prisons in United States. Mason indicates that many public prisons in America house inmate more than the required number because of lack of an alternative place to keep the criminals (4-7). For instance, some of California prisons facility have about 300, 000 prisoner compared to the required number of 170,000 prisoners. Additionally, such high numbers of prisoners hinders effective rehabilitation of prisoners because of lack of sufficient rehabilitation space, tools, and personnel found in the prisons. Fo r this reason, the federal and state government adopting the idea of private prisons was important. This will reduce the congestion in public prisons and ensure effective rehabilitation of all the prisoners hence curbing the level of prison violence. Private prisons served as a cost effective method in the budget of federal and state government in the United States. ... Mason posits that states with higher number of private prisons enjoy lower cost of housing prisoners in the state (8-10). Therefore, with abundant prison facilities in United States, criminal rate may reduce in most states. This is because there will be no waste of time in delay of convicting criminals because of lack of space in public prisons. However, private prisons also have several disadvantages. There are high reports of violence and mistreatment of prisoners in private facilities. Most private prisons have limited incentives that could curb recidivism and violence among prisoners (American Civil Liberties Union 23). Moreover, most private prisons focuses on profit creation and not the safety and decent living of the prisoners hence hindering the process of rehabilitation and accelerating violence level among prisoners. In addition, the management team in private prisons may not have sufficient training personnel to handle cases of violence and recidivism hence, becoming a thr eat in the rehabilitation of prisoners. Thus, such reasons may inhibit the number of prisoners admitted in private prisons while may affect the profit generation goal of the private prison. Despite the private prison goal being profit generation to the public and shareholders, most private prisons experience limited profits level. The amount of profit earned causes the private prisons to overlook the intensity of training the prison security personnel (American Civil Liberties Union 20-22). Therefore, this affects the way in which the private prison personnel may handle rude prisoners and curb the level of prisoners escaping experienced in from private prisoners. Moreover, the surrounding community may not benefit from the revenue gained by the private prison in town. Hence,

Topic will be based on which book you choose Term Paper

Topic will be based on which book you choose - Term Paper Example The constant commercial pommeling that teenagers are exposed to regularly makes them give in to the pressures of being considered cool by their peers, which in turn works in the corporations’ favor (Quart 32). In addition to all the above, the growing need to incorporate sex in some of these advertisements is making its way into the lives of teenagers and younger children. Recent sources in different organizations can attest to this. This paper will examine aspects of the book and relate it to an advertisement, and the impact it might have on its target market. At a particularly young age, teenagers and pre-teenagers are forced into different loyalty schemes by corporations that use their peers to market and sell their products. In Branded, the author brings into account the fact that corporations are having a higher stake in schools than they possibly should. In the past, countless groups, including parents and politicians, were at the forefront trying to resist the notion of advertising in schools. However, the current situation of sponsorship that most corporations boast of is making this a difficult task. Corporations, at present, have more shares in schools than any other party, and they are using this to their advantage. Brand-afflicted teenagers are now everywhere, but there might be time to save some of the young ones from the menace that is branding (Quart 47). Target audience Victoria’s Secret is one brand that is affiliated with the imagery of sex and sex appeal. In most of their advertisements, models and people wearing their lingerie appeal to the adults and market that tends to grasp the concept of being sexy. However, lately the brand has been moving toward a different market altogether. In a recent advertisement, â€Å"Bright Young Things,† the brand has brought to light their aim for a younger market. Teenagers and pre-teens who want to be considered cool are now looking toward Victoria’s Secret line of lingerie in a bid to look older, or more sophisticated. Parents are being forced to give in to the pressure of their young children who demand such clothing, and it is obvious that once children catch on to this brand, there is no turning back. It is next to impossible for the children not to remain loyal to the brand, if they start when young (Lutz 1). Aspects of the demographic The income and lifestyle of teenagers and pre-teens cannot be questioned as it is not impossible to pinpoint exactly where they get their income, or lifestyle choices. These aspects are influenced directly by their parents, immediate family members, and even friends. The little income that teenagers may receive is probably from allowances that parents offer their children once they partake of certain activities. However, as the issue of branding and marketing takes precedence in most schools and areas (Quart 53), teenagers are looking for different avenues which can work toward increasing their capital. It is this aspec t that sheds light on why teenagers look for different jobs during the summer and spring-breaks. More money means more savings, which ultimately leads to lifestyle autonomy. Parents have little or no say in the matter once their children start buying their own clothes, using their hard-earned money. Alissa Quart takes the reader into the processes used by corporations to attract teens and pre-teens into their branding world, and why it is particularly easy for teens to succumb to these schemes. The first aspect that comes into play is the use of people their own age to

Mechanisms for Optical Limiting

Mechanisms for Optical Limiting Chapter 2 2.1. Reverse Saturable Absorption In the mid 1960s shortly after the invention of the laser, many researchers were investigating dyes for potential application to Q-switching of the laser cavity. For this application, dyes were sought that would bleach to transparency under intense illumination (saturable absorbers). Guiliano and Hess [2a] in 1967 were investigating vat dyes and their modified cousins and noted some examples that not only did not bleach to transparency but instead darkened at high intensities. This was the first recognition of the property of reverse saturable absorption (RSA). Reverse saturable absorption generally arises in a molecular system when the excited state absorption cross section is larger than the ground state cross section. The process can be understood by considering a system that is modeled using three vibronically broadened electronic energy levels, as shown in figure 2.1. The cross section for absorption from the ground state 1 is à ¯Ã‚ Ã‚ ³1. à ¯Ã‚ Ã‚ ³2 is the cross section for absorption from the first excited state 2 to the second excited state 3. The lifetime of the first excited state is à ¯Ã‚ Ã‚ ´2 (seconds). Figure 2.1: Three level and Four level models for RSA As light is absorbed by the material, the first excited state begins to become populated and contributes to the total absorption cross section. If à ¯Ã‚ Ã‚ ³2 is smaller than à ¯Ã‚ Ã‚ ³1, then the material becomes more transparent or ‘bleaches’ i.e. it is a saturable absorber. If à ¯Ã‚ Ã‚ ³2 is larger than à ¯Ã‚ Ã‚ ³1, then the total absorption increases, and the material is known as a reverse saturable absorber. This behavior is shown in figure 2.2 Figure 2.2: Plot of the incident intensity versus the transmitted intensity of a typical three level RSA material. The change in intensity of a beam as it propagates through the material is: , (2.1) Where z is the direction traversed, NT is the total number of active molecules per area in the slice dz, N2 is the population of level 2 and the population of level 3 has been neglected. Initially, the material obeys Beer’s law when 2 is unpopulated, and the transmission is constant as the incident fluence is increased. The slope is given by. At a sufficiently high fluence, however, the first excited state 2 becomes substantially populated and in the limit of complete ground state depletion the slope again becomes constant at the new value of. The optical limiting action is not truly limiting, as the fluence, which is transmitted, is still increasing with increasing incident fluence, but it does so more slowly. If the ratio à ¯Ã‚ Ã‚ ³2/à ¯Ã‚ Ã‚ ³1, is sufficiently large, however, the new transmission will be small and in a properly designed system the dynamic range of the sensor will be greatly extended. The three level diagrams describe the simplest case for RSA materials but can generally only be applied for subnanosecond pulses and under circumstances such that transitions from the second excited state are negligible. The energy states involved in three level materials usually consists of singlet states and the transitions are all allowed. The transition cross sections are therefore large, but a disadvantage is that de-excitation is rapid (à ¯Ã‚ Ã‚ ´2 is small). This necessitates larger intensities for long pulses to activate the nonlinearity through populating the excited electronic state. Fortunately, on longer timescales in some systems, significant intersystem crossing to other states can occur from the first excited state. In this case the five level diagrams shown in figure 2.1 is applicable. The excited state 4 is usually a triplet or other long-lived state, and for long pulses it can act as a metastable state that accumulates population during the pulse. The lifetime of 4 gives an indication of the maximum pulse width for which the material is efficient to act as an optical limiter. Pulses with duration longer than the metastable state allow some of the metastable molecules generated by the leading edge of the pulse to decay to the ground state before the trailing edge have passed, thereby reducing the RSA. In most systems, à ¯Ã‚ Ã‚ ´3 and à ¯Ã‚ Ã‚ ´5 are very small and significant populations of 3 and 5 do not accumulate. Therefore, N3 and N5 can be set to zero, considerably simplifying the dynamical equations describing. The equations representing the full five level models are given below by: (2.2) (2.3) (2.4) (2.5) (2.6) (2.7) and (2.8) Where hà ¯Ã‚ Ã‚ ® is the energy per photon, I is the intensity of the pulse and stimulated emission has been neglected. The latter assumes that optical coupling to the excited states is well above the bottom of the vibronic manifolds and that relaxation from the optically-coupled states to the bottom of the manifolds occurs on a time scale that is much shorter than the pulse duration. To completely understand the response of an RSA device, these equations must be solved as the pulse propagates through the material. The material parameters necessary to solve the equations are à ¯Ã‚ Ã‚ ³1, à ¯Ã‚ Ã‚ ³2, à ¯Ã‚ Ã‚ ³4, à ¯Ã‚ Ã‚ ´2, à ¯Ã‚ Ã‚ ´4 and à ¯Ã‚ Ã‚ ´24. For optimum optical limiting performance, certain parameters need to be maximized. The ratio of the excited state absorption to the ground state, à ¯Ã‚ Ã‚ ³2/à ¯Ã‚ Ã‚ ³1, à ¯Ã‚ Ã‚ ³4/à ¯Ã‚ Ã‚ ³1 should be large to minimize the transmission of the limiter at high incident intensity. For maximum efficiency, the lifetime of the triplet state (à ¯Ã‚ Ã‚ ´2) and the intersystem crossing rate l/à ¯Ã‚ Ã‚ ´24 should be large to populate the triplet state and maintain the population throughout the pulse. By the mechanism of RSA we get better performance on optical limiting. 2.2. Two-Photon Absorption (TPA): Two-photon absorption (TPA) can also be used in a manner similar to RSA to construct optical limiters. In contrast with reverse saturable absorption, TPA is an instantaneous nonlinearity that involves the absorption of photon from the field to promote an electron from its initial state to a virtual intermediate state, followed by the absorption of a second photon that takes the electron to its final state. Since the intermediate state for such transitions is virtual, energy need not be conserved in the intermediate state but only in the final state. The mechanism of TPA can be thought of in terms of the three level RSA model for the case where the lifetime of the intermediate state approaches zero and the ground state absorption is extremely low (highly transparent). The intensity of the beam as it traverses the material is: (2.9) Where z is the linear absorption coefficient and à ¯Ã‚ Ã‚ ¢ is the TPA coefficient which is related to the imaginary part of à ¯Ã‚ Ã‚ £(3) by the equation (SI units): (2.10) Here, à ¯Ã‚ Ã‚ · is the circular frequency of the optical field, n0 is the linear index of refraction, and c is the speed of light in vacuum. The solution to the propagation equation for à ¯Ã‚ Ã‚ ¡= 0 (transparent material at low intensities) is given by (2.11) Where L is the sample length. This clearly demonstrates that the output intensity decreases as the input intensity increases, exactly the behavior that is desired for an optical limiter. The strength of this reduction is explicitly dependent on the TPA coefficient, the incident intensity and the sample thickness. For TPA, the material response is of the order of an optical cycle and is, therefore, independent of the optical pulse length for a fixed intensity. The device will respond virtually instantaneously to the pulse. On the other hand, because of the limited magnitude of à ¯Ã‚ Ã‚ ¢ in existing materials, high intensities are required to realize significant TPA. Since the intensity is essentially the energy density divided by the pulse duration, short pulses are required to achieve limiting with TPA for energy densities that may be high enough to damage an optical sensor. 2.3. Free-Carrier Absorption: This type of limiting occurs in semiconductor materials. Once carriers are optically generated in a semiconductor, whether by single photon or two-photon absorption, these electrons (holes) can be promoted to states higher (lower) in the conduction (valence) band by absorbing additional photons. This process is often phonon assisted, although depending on the details of the band structure and the frequency of the optical excitation, it may also be direct. The phonon assisted phenomenon is referred to as free-carrier absorption, and it is analogous to excited-state absorption in a molecular system. It is clearly an accumulative nonlinearity, since it depends on the buildup of carrier population in the bands as the incident optical pulse energy is absorbed. Free-carrier absorption always plays some role in the operation of a semiconductor limiter, if the excitation process results in the generation of significant free carrier populations in the bands. While it certainly contributes to the limiter performance and its inclusion is important in the precise modeling of the response of such devices, just as in the case of TPA, its importance typically pales in comparison with nonlinear refractive effects, whether the carriers are generated by single photon or two photon transitions. 2.4. Nonlinear Refraction Optical limiters based on self focusing and defocusing form another class of promising devices. The mechanism for these devices may arise from nonlinear refraction associated with carrier generation by either linear or two photon absorption in a semiconductor. Both self focusing and defocusing devices operate by refracting light away from the sensor as opposed to simply absorbing the incident radiation. Compared to strictly absorbing devices, these limiters can, therefore, potentially yield a larger dynamic range before damage to the limiter itself. Figure 2.3 (a) shows the typical device configuration for a self defocusing limiter, while figure 2.3 (b) shows a similar device based on self focusing. A converging lens is used to focus the incident radiation so it passes through the nonlinear medium. This lens provides optical gain to the system, allowing the device to activate at low incident intensities. The output passes through an aperture before impinging on the detector. At low input levels, the nonlinear medium has little effect on the incident beam, and the aperture blocks an insignificant portion of the beam, thus allowing for a low insertion loss for the device. When nonlinear refraction occurs, however, the nonuniform beam profile within the medium results in the generation of a spatially nonuniform refractive index. This acts as either a negative or positive lens, depending on the sign of the refractive nonlinearity, causing the incident beam to either defocus or focus. Figure 2.3: (a) Typical self defocusing optical limiter configuration (b) Typical self focusing optical limiter configuration. In a properly designed system, this self lensing results in significant energy blocked by the system aperture, thereby protecting the sensor. The location of the nonlinear medium is critical to the operation of the refractive limiting device. A self-focusing limiter works best if the nonlinear medium is placed approximately a Rayleigh range before the intermediate focus of the device. When the focusing lens is induced the effective focal length of the device is reduced, and hence a larger beam appears at the exit aperture. For a self-defocusing material, the optimum geometry is approximately one Rayleigh range after the focus. This geometry dependence can be exploited to determine not only the sign of the nonlinear refraction in a given medium, but the magnitude as well. This is the principle behind the so-called Z-scan technique, which has been pioneered by Van Stryland and coworkers [2b,2c]. The technique consists of moving the nonlinear medium through the focal region of a tightly focused beam while measuring the transmittance through an aperture placed in the far field of the focal plane. When the medium is far before the focal plane, no self-lensing occurs. As the medium approaches the focal plane, the high intensity begins to induce a lens in the medium. For a negative nonlinearity, this lens tends to collimate the beam, thereby increasing the transmittance through the aperture. Near the focal plane, even though the intensity is highest, the influence of the induced lens is minimized, resulting in a transmittance comparable to the linear transmittance. This is similar to placing a thin lens at the focus of a beam; this results in minimal effect on the far field beam pattern. As the sample is moved beyond the focal plane, the negative lens tends to increase the beam divergence, resulting in a decrease in the aperture transmittance. As the medium is moved still farther from focus, the intensity again becomes weak enough that the induced lensing is negligible. This sequence results in a change in transmittance with a characteristic peak, followed by a null, followed by a valley as the sample is moved from the input lens, through focus, toward the output lens. For a positive nonlinearity, the pattern consists of a valley, a null, and then a peak. Thus, the sign of the nonlinearity is readily determined. While nonlinear absorption has been neglected in this discussion, if present, it must also be accounted for. This is readily done by removing the aperture in the limiter and collecting all the light transmitted by the nonlinear material. This measurement is then insensitive to nonlinear refraction. The response in this case is a valley symmetrically located about the focal plane. It should be noted that nonlinear absorption and induced scattering cannot be distinguished by this technique. The general shape of the Z-scan for a positive index change, negative index change, and a nonlinear absorber or scatterer is shown in figure 2.4 . Figure 2.4: Schematic representation of z-scan results for a negative refractive nonlinearity (dashed curve) and a positive refractive nonlinearity (dotted curve). Both curves have been corrected for absorption. The solid curve shows the result of removing the aperture from the measurement apparatus and collecting all the transmitted light, thus isolating the nonlinear absorption [1e]. 2.5. Induced Scattering Scattering roots from interaction of light with small centers which may be physical particles or simple interfaces sandwiched between non-excited and excited molecular groups. The size of the scattering centers determines whether the scattering will be quite directional or reasonably uniform. Transmission of a medium, for a given solid angle, decreases when scattering centers are induced in the medium by an optical signal. Therefore, this phenomenon of scattering induced by optical signal may be applied to manufacture of optical limiters for sensor protection. Optical limiters based on induced scattering are usually focused on liquid media, as the phenomenon is usually reversible in these media. That is to say, the liquid in the excited state can return to equilibrium with ease in the absence of chemical or structural decomposition. However, in solids, usually irreversible decomposition processes generate the scattering centers which can lead to degradation in the device’s lin ear operation. When light is incident on a particle, the electric charges within the particle oscillate due to its interaction with the electric field. Radiations are then caused by the oscillation. In 1899, Lord Rayleigh originally presented the analytic expression and theory of the elastic scattering of light from particles with dimensions smaller than the wavelength of light. Rayleigh scattering is the name given to the phenomenon. This applies only to particles whose dimensions are quite smaller than the wavelength of light or which are non-absorbing. However, in 1908, Mie developed a theory for particles with dimensions comparable to the wavelength of light or greater [2d]. The transmitted intensity equations of the Mie scattering are notably more intricate than of Rayleigh scattering. In Mie scattering, a bigger percentage of the scattered radiation is in forward direction as the size of the scattering particles increases, implying that limiting based on Mie scattering will not be as effectiv e as Rayleigh scattering. 2.6. Photorefraction Two devices, namely coherent-beam excisor and the beam fanning limiter based on the photorefractive effect are used to limit coherent optical radiation. Materials showing photorefraction should have a nonzero χ(2). The traditional photorefractive mechanism is based on the photorefractive crystal which possesses deep levels that can be excited optically to generate free charge in the conduction or valence band. In a material showing photorefraction, when two coherent beams interfere, additional mobile charge are generated at the peaks of the intensity pattern than at the valleys through photoexcitation of the deep levels of the crsytal. These charges which are photoexcited at the peaks diffuse into the valleys ensuing a variation of charge spatially, in correspondence to the material’s interference pattern. These charges results in an electrostatic space-charge field which gives rise to a change in refractive index through the electro-optic effect in a properly oriented cry stal. Energy coupling and energy exchange can then be achieved between the two beams through the grating generated, which is 90 degrees phase shifted from the intensity of the photon field. A high intensity coherent beam when incident singly on a photorefractive crystal, the energy can be coupled into a large amount of low intensity scattered beams. Fields with new wave vectors are generated inside the crystal by the scattering of the incident beam at the crystal imperfections. The photorefractive gratings are then produced by the interference of the incident field with these scattered fields. Optical signal can later be coupled from the incident beam to the scattered beams through diffraction from these gratings. The light gets preferentially scattered to one side of the crystal as there is a preferred direction of energy transfer for photorefractive gratings which is determined by the direction of the c-axis of the crystal and the charge carriers’ sign. This photorefractive beam fanning phenomenon can be quite efficient in reducing the intensity of the transmitted beam. Construction of an optical limiter using this beam fanning process has been demonstrated by Cronin-Golomb and Yariv [2e]. The photorefractive excisor is another device which provides a weak seed beam to interfere with the incident beam. It is assembled to protect the sensor in such a way that the photorefractive grating produced by the interference of the primary beam with the seed beam at high intensities couples energy from the strong incident beam to the weak seed beam. The speed and efficiency of the device is thus improved. 2.7. Summary All of the nonlinear phenomena discussed above can be used for optical limiting, and figure 2.5 schematically illustrates the application of some of these processes. Figure 2.5 (a) depicts the use of induced absorption, such as reverse saturable absorption, two-photon absorption, and free-carrier absorption. Figures 2.5(b) and 2.5(d) represent, respectively, a self-defocusing limiter, self-focusing limiter, and an induced scattering limiter. Finally, figures 2.5(e) and 2.5(f) illustrate a photorefractive beam fanning limiter and a photorefractive excisor device. While it is often the case that any given material will exhibit multiple nonlinear properties, for simplicity the effects of each individual process have been separately depicted in figure 2.5. Figure 2.5: Some optical limiters based on different mechanisms (a) an induced absorption limiter (b) Self defocusing limiter (c) Self focusing limiter (d) Induced scattering limiter (e) Beam fanning limiter (f) Photorefractive excisor device [1e].