Thursday, August 13, 2020
Back in the Swing COLUMBIA UNIVERSITY - SIPA Admissions Blog
Back in the Swing COLUMBIA UNIVERSITY - SIPA Admissions Blog During the summer the SIPA building is a very quiet place. The reason for this is that we do not offer summer courses. Each student that graduates from SIPA will have a minimum of 30 weeks of professional development experience. 15 weeks come through an internship and 15 weeks come through a workshop. Students are responsible for finding their own internships, but we offer a lot of assistance through Career Services, faculty, alumni, and current students. We want students to be able to go anywhere in the world to complete their internship and thus we do not offer summer courses so that students can focus full time on professional development and resume building. Workshops are group projects composed of 5-6 students working for an outside client. The workshops are set up by faculty and administrators and students pick from a predetermined list. Workshops take place during the academic year. Back to the point of this entry . . . the quiet atmosphere of SIPA will cease next Monday as we welcome new students for Orientation and the following week returning students will be back for the start of classes. Once classes start the building buzzes with activity each and every day. It is typical for there to be 10-15 events each week featuring amazing speakers. Here is just a taste of what will be featuring as the semester starts. We will have Leaders in Global Energy lecture series starting on September 15. Opening remarks will be given by Nabuo Tanaka of the International Energy Agency. He will be followed by the Portuguese Prime Minister, Jose Socrates, in late September. CH Tung, the first Chief Executive of Hong Kong and one of SIPAs Global Fellows will be speaking on US-China Relations on September 17. EU Commission President Jose Manuel Barroso will be speaking at the World Leaders Forum on campus and will likely address SIPA students following the main university event. We will have updates on the blog regarding events so stay tuned.
Saturday, May 23, 2020
Challenges Weaknesses And Strengths - 1164 Words
Challenges: Weaknesses and Strengths: The methodologies have some weaknesses within the acceptable limits and high forces, especially when we apply interviews and online surveys. One of the weaknesses of the quantitative methodologies is that the data collected is limited based on the acceleration of the new discoveries of the electronic which is the medium for virtual teams. Every new day, the new and improved means of communications come into existence, whereas the available data on the books and journal medicals or any other means are limited. In retrospect, surveys may not be a valuable means through which the researcher gets information unless the research investigates very thoroughly on the specimens he/she chooses. Interviews are also challenging, either the researcher may not have access to the right person due to the anticipated importance of the expert, or the cost may be unfordable and beyond the researcher limits. In my research, the possibility of concluding a study with a high percentage of acceptability is possible, though it may not be economically feasible. To have the full potentiality of the methodologies, a maximum number of methods that research used in the investigation are commanding. Whereas using any limited number of methods may not reveal the targeted percentage of acceptability, hence fail to achieve the objective satisfactorily. The richness and density of data remain a guarantee of the success of any innovative research such as the virtualShow MoreRelatedThe Challenging Task of Leadership in the Nursing Profession1442 Words à |à 6 Pagesself-discovery, self-improvement, renewal, and reflection (ââ¬Å"Become a Nurse Leaderâ⬠, n.d.). It also requires an individual to identify values he/she should embrace in the process, identify personal and professional strengths to enable him/her become a leader, identify and deal with weaknesses, and understand his/her role in achi evement of nursing goals. Values a Nurse Should Embrace As a Leader/Director in Nursing: As previously mentioned, developing skills that help a nurse become a nurse leader isRead MoreBrainology Rough Draft (2).When It Comes To The Topic Of991 Words à |à 4 Pagesengaged in learned how to view challenges as opportunities to become smarter. In the AVID program, we are challenged to do extra work to increase our chances of success in core classes. It demands more effort in taking notes, at least five note pages per class. We were focusing on the process of taking more notes and that transformed our motivation to learn. While they rarely admit as much, college students often take for granted that their weaknesses are challenges that cannot be succeeded. AsRead MoreEnvironmental Scanning1136 Words à |à 5 PagesThus scanning for events, trends, issues and expectations that they may be faced with in the future. Furthermore, examining all internal and external environment challenges. Internal environmental challenges may be with employees, shareholders or board of directors or the overall culture of the organization. External environmental challenges may include economic, socio-culture, political, and technological environments, as well as customers, suppliers, competitors, financial institution, governmentRead MoreMy Strengths And Weaknesses At The Air War College1143 Words à |à 5 Pagesincorporating my strengths and weaknesses across the core elements of competence, character and personality. Lastly, I will provide a detailed plan of action on how I intended to address my weaknesses and le verage my strengths. This self-assessment will serve to improve my potential for leading at the senior strategic level in a JIIM environment because it will help me understand my current relevance to my Service (and the Armed Forces writ large), make me self-aware of my strengths and weaknesses above theRead MoreStrengths and Weaknesses1178 Words à |à 5 PagesTo: Date: 13/6/13 Strengths and weaknesses I have a number of key strengths that are contributive to working as a competent manager. I have sound logic, am diplomatic and disciplined and approach social situations with an open mind and an eagerness to understand. While all of these are personal traits, undoubtedly theyRead MoreMy Strengths And Weaknesses Of An Effective Student988 Words à |à 4 Pagesand use their current strengths and weaknesses to create a game plan that will help them be an effective student. Personally, I think this is a great tool because it helped me identify what my strengths are. Since I identified more strengths than weaknesses I saw this self-assessment as a motivation tool. In this lesson, I learned that there can be patterns to your strengths and your weaknesses (Bethel University, 2014). This essay will go over what my strengths and weaknesses were, after takingRead MoreLeadership Strengths And Strengths, Weaknesses, Opportunities And Threats1003 Words à |à 5 PagesDriver (energy, fo cus, speed, and challenge). ââ¬Å"Businesses us the Strengths, Weaknesses, Opportunities and Threats (SWOT) analysis to determine the internal and external factors that directly influence their operationsâ⬠(Marquis, 2016). This is what this analysis brought to mind. The following is the results from my assessment. The purpose of this assessment is to provide insight on both leadership strengths and impotencies. 9/10 = Energy/ 90% --ââ¬Å"Dealing with challenges that abound in todayââ¬â¢s worldRead MoreEffective Communication Is Enhanced By Good Communication Skills1322 Words à |à 6 Pageshave good communication skills will have challenges when communicating with different people from different places. For example, they will have troubles when communicating with their parents, teachers and their friends. What motivated me to improve my communication skills is that many people were unwilling to communicate with me because I had poor communication skills before. Over the years I have tried as much as possible to improve my areas of weaknesses so as to enhance effective communicationRead MoreStrengths and Weaknesses of Leadership Styles1040 Words à |à 4 PagesStrengths and Weaknesses of Leadership Styles Introduction Leadership styles have a major impact on a business or military unit, organization or company achieving its objectives or not. Managers are often excellent at keeping the status quo and making sure existing work gets done, but leaders are critical for defining new goals and how to reach them (Turner, Dulewicz, 2009). The strengths and weaknesses of autocratic, consultative, free-reign and participative leadership are analyzed in this paperRead MoreAnalysis Of The Art Of War By Sun Tzu1249 Words à |à 5 Pageswork as a useful guidance for modern times. The Art of War is actually about struggles and confrontation we all go through in our daily lives. We as all face same kinds of dilemmas in our hearts and minds when it comes to compete with real life challenges. Though the book was compiled as a military advice in ancient times, it has potential to function as practical guide in all facets of life even today. This book is guide for victory in life, but it is also about the art of wa r. At the same time
Tuesday, May 12, 2020
Heart Disease And Cardiovascular Disease - 1028 Words
Houston Community College Coleman Heart Disease Paper Julissa Diaz Ms. Williams ECRD 1211 Spring 2017 Diaz 2 Heart Disease Paper A heart disease or cardiovascular disease are problems such as, coronary artery disease, high blood pressure, congestive heart failure or arrhythmia. Our heart sends blood around our body and if we have any sort of failure with our hearts it will not transport oxygen and nutrients throughout the body causing for a disease to start or occur. Some diseases come heredity but most can be avoided by properly taking care of yourself and being healthy. From my family roots, my grandfather on my fatherââ¬â¢s side suffers from both high blood pressure and heart congestion failure. High blood pressure is very common. Highâ⬠¦show more contentâ⬠¦This is another heart problem that my grandfather deals with. Bouchez stated in her article, ââ¬Å"Women tend to think that breast cancer is their biggest health threat. And while it s important, heart disease remains the No. 1 killer of women, even young women.â⬠After reading this information it scares me knowing that this is the number 1 killer in women and it runs in the family. This can increase the chances of me getting the disease. Ways to avoid this disease would be to stop smoking and stay healthy. I chose high blood pressure as a potential risk in my life because my grandfatherââ¬â¢s suffers from it and chances are if a close relative has high blood pressure you can get it too. I researched how high blood pressure can affect a young women and according to the ââ¬Å"What Causes High Blood Pressure in Young Womenâ⬠article it states that, ââ¬Å"The three most common risk factors for high blood pressure in women 35 and under are pregnancy, drugs and diet.â⬠With this being said, I believe the risk that most suits me is the diet and drugs. I did not put pregnancy under one of my risks because I donââ¬â¢t have any future plans involving me being pregnant until Iââ¬â¢m maybe 30 if not later. Since simple medications such as ibuprofen and Tylenol fall under drugs and those are medications that we are able to take for small aches on any day or any time, that is a risk in which Iââ¬â¢m taking. The biggest risk that scares me is diet. I am very unhealthy; in the way I eat. I love fastShow MoreRelatedCardiovascular Disease And Heart Disease981 Words à |à 4 PagesCardiovascular disease has reportedly been the number one disease killer for men and women in the United States of America. Every one out of four deaths is caused by heart disease in the United States alone (Centers for Diseases Control and Prevention). Heart disease refers to the different types of conditions and symptoms that can affect the oneââ¬â¢s heart and its functions to the body (May o Clinic). Cardiovascular/Heart disease has many causes and conditions, prevention methods and symptoms, andRead MoreCardiovascular Disease And The Heart Disease Essay1727 Words à |à 7 PagesCardiovascular diseases are diseases which involve the heart or blood vessels, they are in fact the leading causes of death and disability in the world. Cardiovascular diseases include coronary artery disease, or ischaemic heart disease (heart attack), cerebrovascular disease (stroke) and diseases of the aorta and arteries including hypertension and peripheral vascular disease (Mendis, Puska, Norrving, 2011). They are all due to a disease known as atherosclerosis which affects arteries (GeorgeRead MoreCardiovascular Disease And Heart Disease1904 Words à |à 8 PagesAccording to the American Heart Association, cardiovascular disease or heart disease is one of the leading causes of death in America. Cardiovascular disease refers to a disease of the heart and/or blood vessels. It is also know n as heart disease. The term cardiovascular disease covers many conditions and is extremely dangerous. Atherosclerosis is one of the major conditions that falls under the cardiovascular disease category. Atherosclerosis is a condition that develops when plaque, made from variousRead MoreCardiovascular Disease And Its Effects On The Heart985 Words à |à 4 PagesCardiovascular disease is conditions that involve narrowed or blocked blood vessels that can lead to stroke, heart attack, and chest pain. Heart disease is the leading cause of death in men and women in the United States (CDC 2015). Numerous problems in the heart lead to atherosclerosis. Atherosclerosis is an active process involving molecular signals that produce altered cellular behavior as well as endothelial dysfunction and a subsequent inflammatory response (Swain 2013). Atherosclerosis is aRead MoreCardiovascular Disease : A Disease That Affects The Heart And Blood Vessels1910 Words à |à 8 PagesCardiovascular disea se is a disease that affects the heart and blood vessels which may cause various problems relating to the blood flow to the heart. Many complications arise from cardiovascular disease, which may lead up to other life threatening illnesses such as heart attack or stroke. According to the American Heart Association a heart attack occurs when the blood flow of blood to part of the heart is blocked by a blood clot; if the clot cuts the flow of blood part of the heart muscle beginsRead MoreCardiovascular Disease : The Congestive Heart Failure, Stroke, And Coronary Heart Disease Essay1752 Words à |à 8 PagesIntroduction Cardiovascular disease comprises the congestive heart failure, stroke, and coronary heart disease. These conditions have continued to be the major causes of morbidity and mortality in the United States of America today. The occurrence of cardiovascular diseases is influenced by various factors such as physical, political, environmental, and social factors (Kochanek, 2011). These factors entail access to quality and affordable health care services, affordability to healthy diets, conditionsRead MoreA Research Study On Cardiovascular Heart Disease1079 Words à |à 5 PagesIntroduction Cardiovascular heart disease, the leading cause of death in Tennessee, is the result of many health problems including high blood pressure, high cholesterol levels, diabetes mellitus and obesity (ââ¬Å"Statistics and Reportsâ⬠, n.d.). The mismanagement of these chronic health problems will very likely lead to more fatal conditions that can be prevented simply by making necessary lifestyle changes. Cardiovascular disease comes in a variety of forms, but the most common are coronary arteryRead MoreCardiovascular Disease : The Heart And / Or Blood Vessels1419 Words à |à 6 Pages Introduction Cardiovascular disease is the prevalent and singularly predominant underlying cause of premature death and disability in the modern world, attributing to 4.35 deaths per year in Europe alone. 1 This general category collectively comprises of all diseases of the heart and/or blood vessels including atherosclerosis, which is a chronic inflammatory disease that manifests in the wall of arteries 2 causing their narrowing and hardening due to the aggregation of fatty plaque depositsRead MoreCardiovascular Disease : A Heart Failure, Arrhythmia And Mitral Valve1071 Words à |à 5 PagesWith the increased consumption of fast-food and poor lifestyle choices, we have become an increasingly obese nation. For this reason, diseases such as cardiovascular disease have been on the rise. Cardiovascular disease is the combined term for a number of diseases concerning the heart and the blood vessels. Many of these life threatening diseases are related to a condition called atherosclerosis. The condition creates plaque build-up on the walls of the blood vessels. The plaque effects the flowRead MoreCardiovascular Diseases ( Cvds ) Are A Group Of Disorders Of The Heart And Blood Vessels881 Wor ds à |à 4 PagesAccording to the World Health Organization, ââ¬Å"cardiovascular diseases (CVDs) are a group of disorders of the heart and blood vessels.â⬠These include coronary heart disease and ischemic stroke. CVD has been a main public health topic since the late 1990s because of its high prevalence. ââ¬Å"Nearly 800,000 people die in the U.S. each year from cardiovascular disease, accounting for 1 in 3 deaths and more than $300 billion in direct medical costs and lost productivityâ⬠(CDC Looks Ahead: 13 Public Health
Wednesday, May 6, 2020
An Analysis of ISIS and its Relation to Traditional Islam Free Essays
In todayââ¬â¢s world it is easy to assume that ISIS and traditional Islam are the same thing. The news often reports phrases like ââ¬Å"radical Islamist terroristsâ⬠and ââ¬Å"radical Islam.â⬠Has society made a correct assumption? Are all people who follow Islam potential terrorists? Does Islam seek to promote such terrorist behaviors? This paper seeks to address these questions and uncover the differences between the two, if any. We will write a custom essay sample on An Analysis of ISIS and its Relation to Traditional Islam or any similar topic only for you Order Now Traditional Islam Traditional Islam began over 1,500 years ago and currently has around 1.6 billion followers. The word ââ¬Å"Islamâ⬠actually means ââ¬Å"submission to God.â⬠Therefore, a Muslim is someone who strives to submit to God. Islam has spread completely around the world. You can find Muslims in North and South America, Western Europe, Africa, the Middle East, and Asia. Their principal homelands lie in the area commonly referred to as the ââ¬Å"10/40 Windowâ⬠(between 10 degrees latitudinal north and 40 degrees latitudinal north ranging from the eastern side of North Africa to the western side of Asia). Majority of Muslims are Asian (60%) and the rest are Arab (22%) sub-Sahara African (12%) and Eastern European (5%) . Islam was founded in 610 A.D. by a man named Mohammed. During Mohammedââ¬â¢s time, polytheism reigned, and people were worshipping many gods at the same time. Mohammed had a vision from a being he thought to be an angel who told him, ââ¬Å"There is only one God, and His name is Allah. Worship Him.â⬠Islam, at its core, is a religion based on faith, life, piety, freedom, religion, peace, and morality. Researcher Sohaib Sultan states: ââ¬Å"Islam believes in a God of mercy, a scripture of mercy, and a Prophet who was sent as a mercy to all the world.â⬠ISIS ISIS began in 2003 as a ââ¬Å"blowbackâ⬠of the U.S. invasion and dysfunction of Iraq. In the earliest stage there were several Sunni extremist groups who were fighting back with the U.S. in hopes to provoke a civil war. The group, at that time, was called al Qaeda which was in Iraq with Abu Musab al-Zarqawi in command pledging allegiance to Osama bin Laden. Zarqawi was killed during a 2006 U.S. airstrike, but the group continued . ISIS is a post-al Qaeda terrorist group. With over 30,000 fighters, ISIS holds territorial lands in both Syria and Iraq. It maintains an extensive military operation, controls communications, controls infrastructure, and funds itself. It can be said that ISIS is a pseudo-state which is led by their military. The goal of ISIS is to control certain territories thereby creating a ââ¬Å"pureâ⬠Sunni Islamist state that is governed by a strict interpretation of Sharia Law. It also seeks to remove the political borders that the Western governments created in the Middle Eastern regions. ISIS seeks to become the sole political, military, and religious authority over all the Muslims in the world. ISIS core message is more about power and revenge than anything else. Differences Between ISIS and Traditional Islam In the first section of this paper we saw that traditional Islam is a relatively peaceful religion that stresses mercy and peace. This is significantly in conflict with the agenda of ISIS. Where do these two paths cross? What is the relationship between terrorist groups such as ISIS, Al Qaeda, Boko Haram, Al Shabab in Somalia, the Taliban with traditional Islam? Many people believe that ISIS is a group that is based on the religious beliefs of Islam including following the examples of the Prophet Mohammed . This is where most of the confusion comes into play. ISIS uses Islam as a vehicle to carry out their political agenda by reinterpreting the fundamental meaning and purpose of Islam. In other words, they are twisting the Quran to say what they want it to by weaving lies in with the truth and preying on the ignorance of the people. The message of ISIS is vastly spread not only by social media, but through certain mosques as well. Researcher Ian Pelletier suggests the motivations of ISIS are: ââ¬Å"Market and Reinforce: Emphasizes consistency of Islamic Stateââ¬â¢s strategic objectives with mainstream Islamic Law. Obfuscation: Ignores/blurs contradictions between Islamic Stateââ¬â¢s strategic objectives and mainstream Islamic Law. Leveraging: Connects areas in which Islamic State strategic objectives are consistent with mainstream Islamic Law to social movement catalysts in order to gain momentum. Reinterpretation: Justifies a radical reinterpretation of Islamic Law as essential to address past issues or current shortfalls within society and achieve the strategic objectives of the Islamic State. ââ¬Å" ISIS interprets Islam from a very radical point of view that is rooted in the extremist fraction of Salafi/Wahhabi Islam within the Hanbali Sunni tradition . The strategic goals of ISIS are as follows: ââ¬Å"Permanently break down political boundaries and cultivate conditions for government failure and regional sectarian civil war in Iraq and Syria. Establish the Islamic Caliphate by controlling terrain across Iraq and Syria, governing the population within, and defending against external threats. Bring like-minded people to fight alongside and settle within the Islamic Caliphate. à Expand the territory of the Caliphate to connect with the wider Muslim community. ââ¬Å" Traditional Islamic Law (Sharia) is based on the Quran which follows the hadith or the teachings of Mohammad. It is traditionally viewed as a statement of relatively easy limits and not a source of rigid and inflexible rules to be imposed in any circumstance . It is supposed to be based on the premise of justice and equality for everyone . Historically it has been determined that Islamic Law had the most humane and liberal fundamental principles as it fostered peace with self and society. Groups such as ISIS use Islamic Law instead for harsh discipline and to control the people. Sharia, as it was originally intended, was used as a guideline for societal norms and values. It served as a model in which one could pattern their life after. Some of the many positive attributes of Sharia are: a belief in God, daily prayers, asking/receiving forgiveness, freedoms of choice, strong sense of community, love your neighbors, exercise self-control, do not abuse religion to exploit or abuse others, and must respect the rights of others. Conflicts Between ISIS and Mainstream Moderate Muslims There have been many practicing Muslims who do not agree with nor adhere to the beliefs of extremistsââ¬â¢ fringe groups such as ISIS. In an open letter from 120 Islamic scholars and clerics to Abu Bakr al-Baghdadi, they challenged ISISââ¬â¢s ways as being un-Islamic. They further claimed that ISIS routinely twists and perverts Islamic Law selfishly to achieve their own agenda. The letter went on to illustrate the contradictions between ISISââ¬â¢s theology and that of traditional Islamic Law. The scholars accused them of citing only portions of the Quran without taking the whole spirit of the Quran and Hadith into account. It was also noted that ISIS had a practice of killing innocent people and that jihad was only meant for defensive measures during a war. Offensive measures of Jihad, without proper cause, was equal to criminal conduct and was not acceptable in traditional Islam . The letter also went on to say that Islam forbids the mistreatment of Christians and no one can be forced to convert to Islam against their will. Author Wael Hallaq states that, ââ¬Å"Sharia is not a rigid unchanging ââ¬ËLaw of Godââ¬â¢ and when applied correctly, it is flexible. The way it is interpreted and implemented by ISIS makes it a little more than a list of fixed punishments, ritual requirements and oppressive rules that are enforced with coercion upon a marginalized group of people. In addition, it is increasingly clear that ISIS selectively interprets Sharia.â⬠One may ask how ISIS is able to get away with using Islamic Law to achieve its objectives. They accomplish this by convincing people that their views are in fact inline with mainstream Islamic traditions. They have a knack for rationalizing any perceived contradictions that are found within their belief and the traditional teachings. Al-Baghdadi, while addressing his fighters said, ââ¬Å"Beware, O lions, the state that they reach a Muslim woman or child or sheikh without you, for if this happens, then, by God, you have no excuse for yourselves before me. Look to yourselves and do not be a place of blame. Put their bodies before yours. Their blood before yours and their fortune before yours, and beware of being happy to live in a day when the honor of a Muslim woman is transgressed, or the blood of a child is spilled, or an elderly sheikh is insulted, for what deliciousness can there be in life if this is in it or even a part of it?â⬠While his speech is complimentary with Islamic Law in principle, he is trying to energize his fighters to fight in a war that is not justified according to Islamic Law. He stresses that not only is the war just, but it is according to Islamic Law which it a bold lie. They may sincerely believe that their war is justified due to their extremist views, but according to traditional Islamic Law, they are not qualified to wage war with anyone unless it is a defensive measure. ISIS does not engage in defensive measures as a ruleââ¬âthey are very offensive in their tactics. Conclusion Extremists groups, such as ISIS, claim to be Islamic in their beliefs, but they do not adhere to the basic tenants of the faith. They twist and turn the Quran and Hadith to make it say whatever they need it to say that will further their agenda. ISIS is a violent terrorist group that has been attracting many young people. They seek out those who are vulnerable, who are seeking religious righteousness, adventure, power, and a sense of belonging. They are also known for producing sexual opportunities for the young men by keeping women as slaves. This is extremely contradictory to traditional teachings and philosophy of traditional Islam. It is certainly a disservice to the majority of Muslims to assume that all Muslims are somehow connected to terrorist activities. In America, ever since September 11th, 2001, there has been a remarkable increase of violence and hatred against Muslims from such assumptions. Extremists groups are not representative of what it means to be a Muslim in todayââ¬â¢s world. We need to see them for who they are and not for the vehicle they misuse which is Islam. Furthermore, it is very unhelpful when the media keeps reporting phrases like ââ¬Å"radical Islamâ⬠and ââ¬Å"Muslim extremistsâ⬠as this further perpetuates the discrimination and hatred against innocent and peace-loving Muslims. There is no link between ISIS terrorism and traditional Islam. ISIS fundamentally changes the core beliefs of Islam and inserts their own interpretations to make it into something that is self-serving. Extremists can be found in most religions. The only way to combat this is to be very knowledgeable of your own religion and beliefs so that you will recognize a falsehood when you hear it. Sadly, many people simply believe what they are told and that is it. Such people can be easily caught up in extremist groups as they lack knowledge. The same can be said for Christianity. We are not exempt from those who have perverted Godââ¬â¢s Word to make it say something that it never was intended to say. This is how cults are formed, and again, is due to a lack of knowledge. The bible says that the people perish due to a lack of knowledge (Hosea 4:6). ISIS operates via intimidation, fear, legalistic authority, assassinations, and bombings . This is nothing like what traditional Islam teaches. In fact, it is quite the opposite. It is not fair to classify all Muslims by such rouge fringe groups. For two years I worked and lived in an Islamic country. I never met anyone who was associated with ISIS nor any other extremist group. I found the Muslims there to be very friendly, eager to help, and welcoming. That experience really helped me to see them for who they really are and without the media bias that was projected to me. Many Muslims do not even consider groups such as ISIS to be true Muslims. They look at them in disdain as the perverters of Islam. Usually these are the more educated people who know what Islam is supposed to be. Sadly, a lot of Muslims have a lower educational level which would be very conducive to being led astray. Many modern Muslims are Muslim in name only and not in practice which makes them an easy target for extremists. How to cite An Analysis of ISIS and its Relation to Traditional Islam, Papers
Sunday, May 3, 2020
The Movie Django free essay sample
Willis AFRS 55T (Tamp;[emailprotected]:30) Dr. T. Hasan Johnson 02. 23. 13 Extra Credit The Movie ââ¬Å"Django Unchainedâ⬠The objective of this paper is to review some of the results of the discussion-panelââ¬â¢s analysis of certain aspects of this movie that relate to the Hip-Hop culture. On Thursday, February 21, 2013, I attended a panel discussion hosted by the Africana Studies Department of Fresno State University. It was conducted at the African American Museum, Fresno California. Its purpose was to evaluate this movieââ¬â¢s effect on us (basically Black-Americans), by analyzing elements of this movie. This movie presents Black masculinity and femininity during the 1860s slavery era of America using characters that portray slaves as childish and stupid (the Betina or DArtagnan), violent (the Mandingo or Django), hypersexual (Sheba) and cowardly (all the black male slaves). These slavery created representations of Black masculinity (the Buck) and femininity (the Jezebel/Mulattoe) are relevant to Hip-Hop because they are the predominate characters being proffered as entertainment in the overwhelming majority of Hip-Hop videos. We will write a custom essay sample on The Movie Django or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The stereotypical persona of ââ¬Å"The Buckâ⬠in the videos is the Gangsta/Thug and ââ¬Å"The Jezebel/Mulattoeâ⬠is the Bitch/Hoââ¬â both are slavery created stereotypes. The Jezebel/Mulatto (Bitch/Ho) The Buck (Gangsta/Thug) Another aspect of this movie relevant to Hip-hop culture is the word ââ¬Å"niggerâ⬠, used incessantly in the movie, just as, its morphed version, ââ¬Å"Niggaâ⬠is used incessantly by Hip-Hoppers, in conversation and in their videos. Since language is one of the seven essential element of all cultures, the usage of the word ââ¬Å"niggerâ⬠was discussed by the panel and audience and as a result of this discussion, we agreed thatââ¬âwithout the use of the word ââ¬Å"niggerâ⬠, ââ¬Å"Django Unchainedâ⬠would not be authentic; because, in this movie, ââ¬Å"niggerâ⬠is a descriptive term, used to describe property, e. g. a slave or slavesââ¬âwith no malice intended. Here are two examples, horse or horses and house or housesââ¬âergo, nigger or niggers. The only character that uses ââ¬Å"niggerâ⬠other than as a description of property is Stephen (the ââ¬Å"Uncle Tomâ⬠played by Samuel L. Jackson). He used the word ââ¬Å"niggerâ⬠to degrade his fellow black slaves. As with the movies use of ââ¬Å"niggerâ⬠, the same can be said about Hip-Hop videos, they would lose its authenticity without the use of the word ââ¬Å"Niggaâ⬠because ââ¬Å"Niggaâ⬠in Hip-hop is a descriptive turn, but unlike ââ¬Å"niggerâ⬠it versatility. For example, it can be used describe a relationship and its meaning changes depending on who is saying it and to whom. For example, in the movie when a Slave-master says ââ¬Å"My niggerâ⬠, it does not have the same meaning as a Gangsta/thug or Jezebel/Mulattoe in a Hip-Hop video saying, ââ¬Å"My Niggaâ⬠. The Slave-masters are describing their property, while the Hip-Hoppers are describing their relationships. During the audience participation portion of this discussion, a young black- man in the audience (Christopher Jackson) described how much the movie upset him. He also shared with us, the extent to which it made him realize how horrible slavery was; and how much suffering his ancestors had to endure; so that he can enjoy the civil rights he has today. He said, ââ¬Å"Now I truly appreciate my ancestors and men like Martin and Malcolm, who made the ultimate sacrifice so that I can enjoy the freedom I have today. â⬠Personal Reflections If the motives for making ââ¬Å"Django Unchainedâ⬠are to make us aware of how much our ancestors suffered under the yoke of slavery and to make us cherish our freedom; then, Christopher Jacksonââ¬â¢s words are a testament to this movieââ¬â¢s success in both endeavors! In conclusionââ¬âI, along with many participants in this discussion, enjoyed ââ¬Å"Django Unchainedâ⬠and hope that there will be more movies made that expose the horrors of slavery, and that, also promote positive images of black men and women. [ 1 ]. This paper was submitted as extra credit for AFRS 27, 55T and 144 [ 2 ]. Heretofore, us, we, and our refers to Black-Americans [ 3 ]. Donald Bogle, Toms, Coons, Mulattoes, Mammies Bucks
Thursday, March 26, 2020
Police Corruption
Abstract The American society has gone through difficult times due to police brutality and misconduct mainly because of corruption that has threatened to interfere with the very survival of society. In the mid 19th century to early 20th century, clandestine police forces were popular and the representatives of Pinkertonââ¬â¢s and other police forces available for hire were infamous since brutal employers utilized their services to quell violence against striking workers.Advertising We will write a custom research paper sample on Police Corruption specifically for you for only $16.05 $11/page Learn More Heavy-handed law enforcement coupled with illegal groups such as Ku Klux Klan acting through vigilantism denied individuals their civil rights formulated in the 1871. The law provided that it was illegal for state law to interfere with an individualââ¬â¢s constitutional rights under the national rules. In early 21st century, section 1983 of the 1871 act became one of the important instruments of fighting police brutality and injustice in society (Klockars, 2000). The 20th century witnessed lawful, organizational, and scholarly models to the issue. Some developments in the state fought the criminality of the state machinery indirectly, such as the endorsement of the civil rights in 1964. The passage of the act protected individuals who had undergone psychological and physical pain due to police misconduct. Furthermore, the landmark rulings by the Court gave the public powers and authority against the actions of police officers. For instance, the Fourth Amendment prevented police officers from searching and seizing and individual without court permission (Goldstein, 1975). Even though legal protection and well-planned reforms exist, police brutality has persisted and people are still suffering in the hands of the state machinery. Furthermore, the extent at which people encounter police brutality is unknown to the public due to a number of reasons. Misconduct issues among police officers are usually quantified based on each city even though information provided is subjective (Klockars, 2000). Furthermore, the levels of corruption are even harder to measure. The studies should be undertaken to determine the levels of corruption in the police force. To do this, a number of research hypothesis are to be formulated. Again, the researcher should undertaken a research to determine the effective utilization of personality measures to identify officers who are prone to corruption. Finally, the researcher would suggest some recommendations on how to end the problem. For all these to happen, the problem statement is to be defined clearly at an early onset of research. Introduction Corruption is a variable that has been defined variously by many scholars. On one hand, it has been defined as the violation of regional and national laws. Others view it as the violation of personal rights contained in the constitution by p olice officers. Another group of scholars perceives it as the commitment of crime by police officers to achieve personal interests. In general, corruption refers to police misbehavior and abuses of police authority.Advertising Looking for research paper on government? Let's see if we can help you! Get your first paper with 15% OFF Learn More From the definitions, the term refers to a number of technical, illegal and civil infringements. In this respect, misconduct is the broad category of civil violation. Misconduct becomes technical in case it is used to refer to police officers who go against the policies and rules of the police service. The term is used to criminal in case it is utilized to refer to violation of state and national laws by police officers. Finally, it is used to refer to unconstitutional in case the rights and freedoms of citizens are contravened by police officers in any state or in any part of the country. There are a number of police misconducts i ncluding excessive utilization of physical or lethal force, prejudiced arrest, physical or verbal pestering, and discriminatory enforcement of law (Rozella, 2003). The law protects citizens from police brutality but the issue of corruption and misconduct still exist in society. In fact, the department of police has always strived to produce quality police officers through setting up of the professional codes of conduct, reviewing the training needs of officers and conducting credible investigations and subsequent punishment of officers in case found guilty. However, these have never stopped corruption among police officers. This paper will therefore conduct a research to establish the why corruption is a commonplace in the American society. The paper employs research methodologies to determine measure carefully the existing problem. From the collected data, the paper comes up with conclusions and recommendations that would change the state of affairs as regards to corruption. Proble m Statement Since 1999, the American society has witnessed various police misconduct issues. In the same year, there was a worst scandal ever involving the Los Angeles Departmentââ¬â¢s Rampart borders and certainly, its elite anti-gang unit referred to as the CRASH (Community Resources against Street Hoodlums). Upon investigation, both local and state, CRASH was banned and seventy officers were taken in for investigations. A number of police officers were found guilty of misconducts while several of them were convicted mainly because of drug trafficking, larceny, promoting mugging, tempering with arrests and filing bogus reports. The Rampart humiliation brought about many problems to the police force. It bore heavy costs to the policy makers in the force, which were both financial in nature and psychological. Much criminal fervor accredited to the work of corrupt individuals in the work force was overturned by the court. By 2003, the police force in the city had already lost over $40 in lawsuits. Consequently, the 2000 agreement between the Lo Angeles city council and the federal government put the police in the city under the custodianship of the judge for five years. The judge was to monitor reforms and evaluate the activities of the police.Advertising We will write a custom research paper sample on Police Corruption specifically for you for only $16.05 $11/page Learn More Compared to other agencies in the country, the Los Angeles police force is no exceptional. In 1990s, the New York Cityââ¬â¢s wide-ranging reforms were put into sport light following the high-profile cases involving police misconduct (Giuliani, 1995). The New York cases proved that it was difficult to handle cases involving police misconduct. The first case was put forth in 1997 where a Haitian migrant was thoroughly beaten under police custody. The foreigner was said to have been harassed sexually since cases of sodomy were also reported. In 2000, the po lice officers were jailed for interfering with individual freedom and justices. However, the court overturned the ruling in the United States v. Schwarz. The second New York hullabaloo pertained to the killing of an unarmed man in 1999. The undercover officers allegedly shot the Guinean migrant 41 times. Citizens protested against the actions of the police unit referred to as the Aggressive Street Crimes. The officers were set free in 2000 controversially. The police brutality and rampant corruption has led to public outcry where demonstrations have been mounted to disown the misconduct of the police. In the contemporary world, police have accused of beating and harassing a black American citizen who was found in the street. In 2001, the court set free one police officer who was allegedly accused of shooting a black man. The American populace blames police brutality on defective policies that insist on aggressive policing on matters pertaining on drugs, street crimes and street gang s. Police department is of the governmental agencies that are known to resist change in society. Due to these problems, city council authorities, the ministries of justice and state security, and renowned criminologists have launched studies to establish ways that can bring about reforms in the police service. Upon this realization, this paper sets out to reinforce the findings of other scholars as they attempt to find solutions to the existing problems. Therefore, the paper collects data in order to analyze the same data to reach at important conclusions and recommendations. Variables In this research paper, the researcher is interested in testing variables such as crime rates, crime reporting, personality traits of officers, and police corruption. The research tests various hypotheses that are associated with the interaction between them. The hypotheses may perhaps be combined to arrive at various equations. For instance, the following equations can be arrived at.Advertising Looking for research paper on government? Let's see if we can help you! Get your first paper with 15% OFF Learn More Crime= f (corruption in the police force, crime reporting, A, B1) Crime reporting = g (Corruption in the force, crime A, B2) Police corruption=h (Crime rates, reporting of crime A, B3) Each category of the equations above consists of exogenous variables A, which are universal to all statements. Exogenous variables B are particular to each equation. In other words, variables B refer to those tools that assist the researcher to classify the systematic factors. Factors in the exogenous variables X, which affect the operations of police in each state may include low incomes and inequality in terms of salaries, the level of education attained by officers and ethnic/racial disparities. Scholars view these factors to be responsible for crime. Results expected after measuring these variables would: the rates of crime increase when inequalities increase. Furthermore, urbanization and racial disparities tend to increase the rates of crime in any city. In case police officers are taken through rigorous training system with better equipments and clear curriculum, corruption would decrease. The rates of crime would also decrease. In other words, this shows that the crime reporting rates tend to be positively correlated with the level of training. In this regard, it is negatively correlated with the salary inequalities among civil servants. Urbanization tends to affect crime reporting positively since people are aware of their rights in an urban setting. Ethnicity and racial differences affect crime-reporting practices negatively, especially when communities distrust each other. Consequently, police corruption would definitely reduce in case the population is educated. Corruption is high in case ethnic differences and income inequalities are allowed in society. In any research study, variables must be measured. The researcher would not have achieved his or her mission in case variables are not measured. In this study, income equality is measured using the Gini coefficient. Furthermore, the level of education is measured using the literacy rate scale. The researcher opted for the literacy rate scale as opposed to inquiring about the number of years an individual has been attending classes because the former covers many states. Ethnic/racial differences are measured using the ethno-linguistic fractionalization index as suggested by Creswell (2003). According to this measurement instrument, two individuals taken randomly are expected to belong to different ethnic/racial groups. Moreover, it is a fact that endogenous variables are expected to affect other variables in any research. In this case, it is important to tackle all issues related to corruption in the police force and the issues related to reporting crimes. These variables are used to calculate regression in the equations. It is surprising that finding appropriate measurement instruments for endogenous variables is problematic. For a variable to be measured, it should be exogenous, correlated wit h endogenous variables and be in a position to manipulate the dependent variable in any study. The following equations are used to show how exogenous variables play off in research. B1 (crime) =the extent of punishment, the age of the population, the attitudes of the populace as regards to crime, the provision of the constitution regarding corruption B2 (crime reporting) =activism, the composition of human organizations B3 (police corruption) =attitudes of the officers and the public towards bribery and the influence of diplomats and other officers in government with high ranks and political influence Hypotheses Every research in social sciences attempts to prove that a specific phenomenon occurs due to a specific reason. Conducting a research is like a walk in the desert without a guiding map to show clear directions that should be taken in order to reach the desired direction. Hakim (2000) warns that care should be taken by every researcher when conducting a research to ensure tha t he or she does not wonder off the focus of the study just by the sheer wonder of the research in question. A path should clearly be set, upon which the research would take. Research hypothesis always provides solution to this. Leedy and Ormrod (2005) define hypothesis as a proposition made by the researcher about the research upon which the research would try to determine if it is true or otherwise. Hypothesis is a kind of a proposal or a guess that the findings of a particular research would be in a particular way. As Hakim (2000) notes, a research would always have two hypotheses for every single desired result. There is always the null hypothesis and alternate hypothesis. The null hypothesis would always refute the claim by saying that the proposition does not hold. On the other hand, alternative hypothesis would always try to affirm that the proposition set by the researcher holds. A test would always be conducted on the null hypothesis with an aim of rejecting it. By rejectin g a null hypothesis, the research would be accepting the alternative hypothesis. It is always every researchers desire to reject a null hypothesis because when a research accepts a null hypothesis, it would render the whole research unnecessary. It would be rejecting the proposition made by the researcher, a fact that would render the research null and void. The following hypotheses would be designed to guide the research. H1: Corruption is the police force would possibly lead to higher rates of crime in various parts of the country. This is because criminals are able to buy justice, merit might not be considered in the police force and police forces might turn out to be gangs. H2: Crime augments corruption in the police force since the level of criminality may infect the police. In this case, the criminals might compromise the police to arrest innocent people in society. H3: Crime reporting is always expected to reduce the rate at which corruption takes place within the police forc e. In case a crime is reported, it is impossible for a police officer to set free a criminal. If reported, corrupt officers might be punished by the state. H4: Cases of corruption in the police force reduces the trust held by the public towards the agencies in charge of law enforcement. This would even discourage the culture of crime reporting. H5: Reporting criminal activities to the state authorities reduce crimes since lawbreakers fear being caught. H6: Increased cases of crime tend to discourage the culture of reporting crimes since the people feels demoralized, as criminals are set free. This would lead to cases of mob-justice as the only way of ensuring justice. Qualitative vs. Quantitative Approach Political science and Public Administration investigators generally employ two categories of exploration processes. First is quantitative study, which utilizes mathematical indicators to determine the relative magnitude of a certain political or bureaucratic occurrence. The second category of exploration process is qualitative study, which uses symbols and expressions to point out the occurrence or lack of an event or classify them into various forms. Quantitative and qualitative annotations offer public administration canvassers a number of ways as regards to Operationalization of concepts and calculation of hypothetical constructs, as well as realistic conception (Crotty, 2003). Whereas quantitative techniques can offer a high level of quantity accuracy and arithmetical supremacy, qualitative techniques can provide a superior intensity of information concerning the nature of administrative progression in a certain study environment. The well-designed or positivist archetype that steers the quantitative method of analysis is based on the supposition that public truth has an objective ontological configuration and that people react to this objective setting. Data collection in quantitative study is through questionnaire. The researcher seeks to solicit inform ation by posing questions to the respondents. The major aim of the quantitative prototype is to ensure reliability, validity and generalization of a problem in its patent prediction of cause and effect. Validity is utilized in establishing whether a study measures what it is projected to measure and to estimate the truth of the outcomes. The researcher ensures that both internal and external validities are observed in the study. Internal validity is catered for through careful manipulation of the results. Qualitative study shares the hypothetical postulations of the interpretative model, which is based on the view that public truth is shaped and upheld through personal knowledge. Qualitative investigators are apprehensive in their investigations while trying to precisely illustrate, translate and understand the meanings of occurrences taking place in their normal public perspectives. Qualitative researchers are focused on scrutinizing the difficulty, legitimacy, collective subjectiv ity of the investigator and the respondent as well as minimization of misapprehension (Russell Ryan, 2009). Data collection methods include observation and use of interviews. Observation allows the researcher to analyze the causes of human behavior. Validity in qualitative research is ensured through triangulation of methods, techniques and tools. This study employed a quantitative approach in order to arrive at strong results and conclusions. While quantitative techniques may function well in separating and categorizing the correlates linked to discrepancy at particular periods, qualitative methods are mainly superior at achieving insight as regards to processes and actions that causes practical deviation and have the main benefit of giving sudden insight. Creswell and other scholars made intuitive theoretical structure pertaining to mixed methods, mainly concerning issues of excellence (Creswell, 2003). Mixed methods not only enlarge the study toolbox, they as well offer the chan ce for fusion of study customs and offer the researcher extra viewpoints and insights that are past the span of any solitary method. Research Design There were two key methods used to gather information in this report. The first one was through a questionaire, which was administered online to the staff at police department. The questionaire sought to capture various attutudes of staff at the police department regarding their performance and isses related to corruption. The second source of information used for the research was literature on various aspects motivation. The focus of the literature review was to find information on the application of corruption determent techniques and also to determine the current state of research in the use of curruption prevention instruments. The questionnaire had four Parts. The first part sought to capture the biodata information of respondents. The second part dealt with the demography and gender of the respondents. This was to ascertain the pr evalence of views in varoius categories in order to ensure that if any differences came about, then they would be captured in their demographic space. The third part dealt with academic credentials and work experience. The motivation for this section came from the understanding that different sections of population respond differently to motivators, based on age and academic credentials. The fourth part delved into the specific issues relating to curruption, starting from the understanding of the concept to the possible effects it would have on police officers (Leedy, Ormrod, 2005). The questionaire also employed a mix of open ended and closed ended questions to capture different aspects of issues studied. Open ended questions were used because thay give respondents more time to figure out their opinions, which would make them volunteer more information related to feelings, outlooks and comprehension of the subject. This would allow the researcher to understand the position of resp ondents as regards to feelings. Open ended questions minimize some errors that could have been created in the course of research. Respondents rarely forget answers if given an opportunity to respond freely. Furthermore, respondents cannot ignore some questions because they must go through all of them. Open ended questions generate data that can be used in data analysis by other researchers. In other words, they allow secondary data analysis. On the other hand, closed-ended questions are analyzed easily. That is why they were used in this study. Each response can be coded for statistical interpretation. Nonetheless, closed-ended questions are compatible with computer analysis package. The technique is more specific meaning that its answers are consistent in all conditions. This aspect is impossible with open-ended questions because each respondent is allowed to use his or her own words. Finally, closed-ended questions take less time to administer unlike open-ended questions, which ar e detailed hence time consuming. The questionnaire was sent to respondents through the internet that is, the researcher mailed the questions to respective police respondents. The researcher arrived at this decision after considering time and reseources. The method is costless and less time consuming. Furthmore, the method allows respondents to reflect on the questions and answer them accurately. Employing research assistants would be problematic because of the sensitivity of the study. Many people would be reluctant to give their views freely. The method is ineffective because answers are not independent. The respondent might not have filled the questions him or herself. Moreover, the method is affected by the respondentââ¬â¢s level of literacy. One big disadvantage of the technique is that there is no interaction between the researcher and the researched. This means that respondentââ¬â¢s reactions are not captured. Reactions are important because they give more information re garding to the feelings of respondents. Generally, the technique is more applicable where the researcher is interested in numbers, not deep feelings of the respondent. In this study, the researcher is interested in identifying the number of employees who feel performance related pay is the suitable method of stimulating employees. The use of the questionaire made it possible to capture issues that are unique to the department of police. This is because there was no accessible literature with required degree of relevence to the subject matter about the department of police. The targeted staff responded to the questionaire online. The availability of staff influenced the choice of this method because the police operates throughout and therefore it is not possible at any one time to find all officers in one place. An online questionaire reduced the costs of data collection, assured confidentiality, and was available throughout for the staff for a fixed period. After collection, the dat a went through analysis, culminating to the conclusions and findings discussed in the subsequent sections of this paper. Findings Through analysis, it was estblished that police corruption in the US is caused by a number of reasons. Furthermore, respondents argued that some policies should be formulated to contain the vice, which is very common in the force. It was found out that corruption in the police force is caused by cultural practices among the members of the force. This is what some police chiefs referred to as ââ¬Å"the bad or rotten applesâ⬠. The rotten apples are mostly weak individuals who might have entered the force through corruption hence failing to go through the usual screening process. Going by the views of police chiefs, only a few individuals are corrupt in the police force. Contrary to the opinion of police chiefs, critics of the force claim that the whole force is rotten. It can also be established that irresistible chances offered to police officers mak e them corrupt. These factors include low wages and salaries, pessimism sorrounding the pay system and promotion, socialization process in the police force, political culture in various states that support corruption, non-reproting of crimes among the public and ineffective leadership on the side of government. The constituion gives the police a blank check as regards to individual freedom. This makes the public seek for an alternative way of compromizing the work of police. Peratning to solutions to the problem of corruption in the police force, respondents gave various views. Some members respondents underscored the fact that police corruption have numerous effects in society. Firstly, it affects public trust where the members of public try to use unscrupulous means of obtaining justice such as mob-justice. Furthermore, other organs of government tend to ape the behavior of police officers. Therefore, the findings of the research suggest that the main way through corruption can be avoided is offering police officers a good salary package. Furthermore, the federal government, in collaboration with various states, should come up with training programs aiming at instiling ethics to the officers. Furthermore, the research reveals that police officers tend to shy away from misconduct in places where they are new. Therefore, the federal government should always ensure that tranfers are held after every six months. Finally, the government at both levels should come up with departments that handle public complains. Conclusion Corruption in the police service is a problem that has existed since time in memorial. It is found in almost all police departments. In society, lawa enforcers have the responsibility of ensuring that justice is achieved. The police agency holds the trust of the public. However, research shows that the trust can be lost in case police officers engage in corruption. This would lead to cases of non-reporting, which might even even crimes in the c ountry. It is therefore advisable that the police department handles the issue of corruption with the seriousness that it deserves. In case an officer is suspected to have engaged in corruption, thorough, independent, and credible investigations should be conducted. The state has the sole responsibility of ensuring that the security of citizens is mainatined at all costs. Corrupt officials should not be allowed to serve in any public office. References Creswell, J. (2003). Research design: Quantitative, qualitative, and mixed methods approaches (2nd ed.). Thousand Oaks, CA: Sage. Crotty, M. (2003). The Foundations of Social Research: meaning and perspective in the research process. London: Sage. Giuliani, R. (1995). Police Strategy No.7: Rooting Out Corruption; Building Organizational Integrity in the New York Police Department. New York: New York Police Department. Goldstein, H. (1975). Police Corruption: A perspective on its nature. Washington: Police Foundation. Hakim, C 2000, Re search Design: Sucessful Designs for Social and Economic Research, Routledge, New York. Klockars, C. (2000). The Measurement of Police Integrity. Washington, D.C.: National Institute of Justice. Leedy, P., Ormrod, J. (2005). Practical Research: Planning and Design. Prentice Hall: Pearson. Rozella, F. (2003). Fighting Police Abuse: A Community Action Manual. ACLU Department of Public Education, 3(1). Russell, B., Ryan, G. (2009). Analyzing Qualitative Data: Systematic Approaches. London: Sage. This research paper on Police Corruption was written and submitted by user Cristopher C. to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.
Friday, March 6, 2020
Mathematical Properties of Waves
Mathematical Properties of Waves Physical waves, or mechanical waves, form through the vibration of a medium, be it a string, the Earths crust, or particles of gases and fluids. Waves have mathematical properties that can be analyzed to understand the motion of the wave. This article introduces these general wave properties, rather than how to apply them in specific situations in physics. Transverse Longitudinal Waves There are two types of mechanical waves. A is such that the displacements of the medium are perpendicular (transverse) to the direction of travel of the wave along the medium. Vibrating a string in periodic motion, so the waves move along it, is a transverse wave, as are waves in the ocean. A longitudinal wave is such that the displacements of the medium are back and forth along the same direction as the wave itself. Sound waves, where the air particles are pushed along in the direction of travel, is an example of a longitudinal wave. Even though the waves discussed in this article will refer to travel in a medium, the mathematics introduced here can be used to analyze properties of non-mechanical waves. Electromagnetic radiation, for example, is able to travel through empty space, but still, has the same mathematical properties as other waves. For example, the Doppler effect for sound waves is well known, but there exists a similar Doppler effect for light waves, and they are based around the same mathematical principles. What Causes Waves? Waves can be viewed as a disturbance in the medium around an equilibrium state, which is generally at rest. The energy of this disturbance is what causes the wave motion. A pool of water is at equilibrium when there are no waves, but as soon as a stone is thrown in it, the equilibrium of the particles is disturbed and the wave motion begins.The disturbance of the wave travels, or propogates, with a definite speed, called the wave speed (v).Waves transport energy, but not matter. The medium itself doesnt travel; the individual particles undergo back-and-forth or up-and-down motion around the equilibrium position. The Wave Function To mathematically describe wave motion, we refer to the concept of a wave function, which describes the position of a particle in the medium at any time. The most basic of wave functions is the sine wave, or sinusoidal wave, which is a periodic wave (i.e. a wave with repetitive motion). It is important to note that the wave function doesnt depict the physical wave, but rather its a graph of the displacement about the equilibrium position. This can be a confusing concept, but the useful thing is that we can use a sinusoidal wave to depict most periodic motions, such as moving in a circle or swinging a pendulum, which dont necessarily look wave-like when you view the actual motion. Properties of the Wave Function wave speed (v) - the speed of the waves propagationamplitude (A) - the maximum magnitude of the displacement from equilibrium, in SI units of meters. In general, it is the distance from the equilibrium midpoint of the wave to its maximum displacement, or it is half the total displacement of the wave.period (T) - is the time for one wave cycle (two pulses, or from crest to crest or trough to trough), in SI units of seconds (though it may be referred to as seconds per cycle).frequency (f) - the number of cycles in a unit of time. The SI unit of frequency is the hertz (Hz) and1 Hz 1 cycle/s 1 s-1angular frequency (Ãâ°) - is 2Ã⬠times the frequency, in SI units of radians per second.wavelength (à ») - the distance between any two points at corresponding positions on successive repetitions in the wave, so (for example) from one crest or trough to the next, in SI unitsà of meters.à wave number (k) - also called the propagation constant, this useful quantity is defined as 2 Ãâ ¬ divided by the wavelength, so the SI units are radians per meter. pulse - one half-wavelength, from equilibrium back Some useful equations in defining the above quantities are: v à » / T à » fÃâ° 2 Ã⬠f 2 Ãâ¬/TT 1 / f 2 Ãâ¬/Ãâ°k 2Ãâ¬/Ãâ°Ãâ° vk The vertical position of a point on the wave, y, can be found as a function of the horizontal position, x, and the time, t, when we look at it. We thank the kind mathematicians for doing this work for us, and obtain the following useful equations to describe the wave motion: y(x, t) A sin Ãâ°(t - x/v) A sin 2Ã⬠f(t - x/v)y(x, t) A sin 2Ãâ¬(t/T - x/v)y(x, t) A sin (Ãâ° t - kx) The Wave Equation One final feature of the wave function is that applying calculus to take the second derivative yields the wave equation, which is an intriguing and sometimes useful product (which, once again, we will thank the mathematicians for and accept without proving it): d2y / dx2 (1 / v2) d2y / dt2 The second derivative of y with respect to x is equivalent to the second derivative of y with respect to t divided by the wave speed squared. The key usefulness of this equation is that whenever it occurs, we know that the function y acts as a wave with wave speed v and, therefore, the situation can be described using the wave function.
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