The Technological Accessibility And Socioeconomic Mobility...

I remember travelling to the resort and marvelling at the engineering feat of the Cayo Santa Maria (CSM) causeway in Cuba. The design of the causeway functioned as a method of connecting small parchments of man-made land to the larger archipelagos. Despite the devastation of Hurricane Katrina in ‘08, the causeway remained portionately intact. During my visit in ‘11, however, the causeway was noted for its damages bridges still in need of further repair1. The causeway itself (for the most part) is unlit. Due to (prior) partisan economic sanctions against Cuba, the CSM is a main artery for tourist flow being the major route to the resort(s). The main archipelago sponsors twelve hotels, the first built in ‘01, is quite incredible, considering the limitations placed on the technological accessibility and socioeconomic mobility of Cuban workers. While traversing on the CSM causeway, I distinctly thought of the abundance of people travelling Cuba’s main highway bef orehand. I had asked the guide, (foolishly,) ‘Where are they going?’ -- ’To work’. It was considered a privilege, I learned, to be able to work on the archipelagos—at least you wouldn’t have to walk to work2. A walk that took the workers half of their day. The CSM causeway is very narrow, a two-lane 48 km stretch, I was curious to how the resort workers (unable to walk the causeway) made it to work. Transportation being expensive, not primarily vehicle ownership but public transportation, again, how do they commute? DidShow MoreRelatedThe Technological Accessibility And Socioeconomic Mobility Of Cuban Workers947 Words   |  4 Pagesconsidering the limitations placed on the technological accessibility and socioeconomic mobility of Cuban workers. While traversing on the CSM causeway, I distinctly thought of the abundance of people travelling Cuba’s main highway earlier. I had asked the guide, (foolishly,) ‘Where are they going?â €™ -- ’To work’. It was considered a privilege, I learned, to be able to work on the archipelagos—at least you wouldn’t have to walk to work2. A walk that took the workers half of their day. The CSM causeway isRead MoreOne Significant Change That Has Occurred in the World Between 1900 and 2005. Explain the Impact This Change Has Made on Our Lives and Why It Is an Important Change.163893 Words   |  656 Pages 2 †¢ INTRODUCTION of two epochs we routinely set apart as centuries suggests the need for flexibility in demarcating phases of world history, and for determining beginnings and endings that accord with major shifts in political and socioeconomic circumstances and dynamics rather than standard but arbitrary chronological break points. In the decades that followed the Great War, the victorious European powers appeared to have restored, even expanded, their global political and economicRead MoreStephen P. Robbins Timothy A. Judge (2011) Organizational Behaviour 15th Edition New Jersey: Prentice Hall393164 Words   |  1573 PagesPractices? 30 Point/Counterpoint Lost in Translation? 31 Questions for Review 32 Experiential Exercise Workforce Diversity 32 Ethical Dilemma Jekyll and Hyde 33 Case Incident 1 â€Å"Lessons for ‘Undercover’ Bosses† 34 Case Incident 2 Era of the Disposable Worker? 35 vii viii CONTENTS 2 2 The Individual Diversity in Organizations 39 Diversity 40 Demographic Characteristics of the U.S. Workforce 41 †¢ Levels of Diversity 42 †¢ Discrimination 42 Biographical Characteristics 44 Age 44 †¢Read MoreMarketing Management 14th Edition Test Bank Kotler Test Bank173911 Words   |  696 Pagesagents that display, sell, or deliver the physical product or service(s) to the buyer or user. Answer: TRUE Page Ref: 11 Objective: 3 Difficulty: Easy 96) The task environment of a firm consists of demographic, economic, natural, and technological environments, as well as the political-legal system and the social-cultural arena. Answer: FALSE Page Ref: 11 Objective: 3 AACSB: Analytic skills Difficulty: Moderate 97) Regulation of industries has created greater competition and

Pro Terrorist Torture Free Essays

September 11, 2001, is a moment frozen in time. It was on this day that the world seemed to stop turning, and its course would never be the same again. It was the day of the largest organized attack on American citizens that took the lives of 2,976 innocent everyday people (attention grabber). We will write a custom essay sample on Pro Terrorist Torture or any similar topic only for you Order Now It not only destroyed buildings, it destroyed lives. Not only the innocent lives of the thousands murdered in the burning buildings were destroyed, but the lives of their families were destroyed, and their hearts became filled with hurt and loss. As a result of this unthinkable attack on our country, the lives of thousands of American Soldiers and their families would soon be affected as well The war that 9/11 spun Americans and the rest of the world into was not a regular war in a regular country with regular soldiers. This war was one in which our brave men and women took on a radical religious band of terrorists who hide in caves, hide behind women and children, and strap bombs to themselves just to harm and terrorize others. These people continue to threaten American safety and liberty each and every day and were responsible for the most bloodshed on American soil in a single act of war. These people want nothing more than to harm innocent people and their families and will stop at nothing to do so. So when these terrorists who wear no uniforms and claim no country are captured, some argue that they deserve to be treated humanely. The fact is, they have information that could save thousands of American lives. However, they are so passionate about their cause; such information is not easily obtained. Therefore, the United States has the right to torture prisoners of war (suspected terrorists) in order to acquire vital information that is required to protect our country and its citizens. Terrorists are not regular soldiers in a regular war. They do not even merit POW (prisoner of war) status as stated by the Geneva Convention passed by the United Nations and approved by the Supreme Court. Colin Powell stated that â€Å"bestowing POW status on detainees who do not meet the clear requirements of the Geneva Convention would undermine the rule of law giving equal protections and privileges to all combatants regardless to their respect to the law. † This is not a regular war because we are not fighting against a country; we are fighting religious extremists. Terrorists are not part of an organized military, have no uniforms, and do not represent a country or legitimate state, and therefore, are not protected nor deserved to be rotected under the Geneva Convention. Despite the agreed Geneva Convention, this nine-year war has resulted in different opinions on how protocol should be run halfway across the globe in our country. A very prominent issue between politicians today is the issue of torture. Torture sounds like a horrible word, and when spoken the thought of inhumane treatment, pain, and misery come to mind. But there are different forms and types of torture th at are not so cruel. The United States has been accused of using a form of torture on suspected terrorists known as stress and duress. But this form of torture is, as defined by the Supreme Court, neither inappropriate nor inhumane by any means. (establish credibility/ source #2, quote supreme court) â€Å"Stress and duress is a form of torture that includes: psychological and physical pressure on suspects through methods such as sleep deprivation, covering head with hood to cause disorientation, and pinning prisoners in uncomfortable positions for hours. † This is considered a form of torture. It is sad to think that American citizens who are more worried about being politically correct than the safety of our country and their friends and neighbors are speaking out against these insignificant pushes that soldiers perform on prisoners of war. Videos come out from Iraq and Afghanistan of terrorists slowly cutting off the heads of our brave men and women protecting freedom. It is odd to think that terrorists decapitate and inhumanely kill and murder our soldiers and there is fuss when our soldiers keep a terrorist with American blood on his hands deprived of sleep for a week. It is nice to know that our country still cares about and supports our men and women in uniform. As stated by a poll conducted by Rasmussen (source #3): â€Å"58% of U. S. voters say water boarding and other aggressive interrogation techniques should be used to gain information from the terrorist who attempted to bomb an airline on Christmas Day. † (Rasmussen) T hat means that over half of our nation supports interrogation methods that are more severe than the methods that others in this country are upset about. Also, the military is not torturing terrorists just to torture them because they do not like them or want revenge. Terrorists are being â€Å"tortured† for information such as future plots, hiding places, sources of weapons, etcetera that is needed to simply protect our men and women overseas and our citizens who call this great country home. Some opposition goes so far as to demand American rights for terrorists who want to kill Americans and who hate this country. A Counsel member for Human Rights Watch, Katherine Bierman, (cite source #4) is quoted saying â€Å"If you’re going to sentence them, there has to be a fair trial [this] amounts to nothing more extravagant than giving the defendant the chance to defend himself, not forcing him to incriminate himself and insuring he’s not tortured– the elements of what an ordinary citizen would consider a fair trial. † (quoted in Katel 6) There are many scary and utterly ridiculous elements in this quote. First, as established above, â€Å"torture† is not being used on suspected terrorists– they are using stress and duress to extract information. Secondly, terrorists openly express their hate for this country and say they are proud of their actions; none have incriminated themselves by nothing more than the truth. A terrorist is not going to bluntly admit to something he/she did not do, even if he was severely tortured which they are not. Government documentation, the definition of the word torture, and 58% of our nation can prove that. Not to mention, a trial is costly. To fly a terrorist to our country to have a so-called â€Å"fair trial† is ridiculous and costs the people of this nation hard earned money to have this man put on trial. Not only is it costly, but it brings him/her into the country that his leaders and fellow terrorists spilt blood in. It is not only ethically incorrect to pay American money for these terrorists to have American rights; it is unconstitutional to not give someone a fair trial. Can someone realistically say that a terrorist will receive a fair trial in the country he tried to commit terrorist acts against? What jury of American citizens would find this man innocent? What judge will set him free? And even if by some horrible miracle this murderer is set free- what happens to him? Does he freely walk our streets, or do our citizens spend yet more money to fly this man back home so he can go back to plotting against us? Finally these are not ordinary citizens, let alone even citizens. By no means does a foreign murderer against our citizens get the luxury of the rights he would have if he were a citizen. As stated by an American General Tommy Franks (source citation) , â€Å"I don’t want a soldier when he kicks down a door in a hut in Afghanistan searching for Osama bin Laden to have to worry about whether when he does so and questions the individuals he finds inside who may or may not be bin Laden’s body guards, or even the individual himself- he’s got to advise them of their rights before he takes a statement† (quoted in Katel 6). â€Å"If you are intentionally inflicting pain on someone, then you are torturing them period,† (Masci 5) Human Rights leaders declare. But the politically correct opposition fails to determine the definition of pain. Pain is defined in the dictionary as (source dictionary) â€Å"the acutely unpleasant physical discomfort experienced by somebody who is violently struck, injured, or ill. † When a linebacker sacks the quarterback in a football game and puts the quarterback out of the game for a little bit with a rolled ankle, did he torture him? Or when children are playing dodge ball at school and a child is given a bloody nose, did the child who threw it torture the other child? Absolutely not. My point? Torture is inhumane treatment that causes severe and sometimes permanent damage to another human being through psychological threats and physical beatings, not by sleep deprivation. There is a difference between torture and inhumane treatment. Causing someone stress or discomfort is not torture. Terrorists are a serious threat to our nation, citizens, beliefs, and safety. They do not deserve our rights, trials, and should be â€Å"tortured† by means of stress which is considered humane. The United States will not stoop to our enemy’s level and cruelly and brutally torture our prisoners of war. The time of war is not the time to be politically correct, but the time to take a step back and look at the big picture, the one in which our country has the right to freedom win the war on terror so the world will be a safer place. It is up to us to maintain and protect our freedom and safety. These are the facts, and these are the views of opinions from both sides of this fragile issue. Now you know, and it is important as American citizens to be informed and aware so we can elect people that will do the right thing in our eyes and defend freedom in the way you see it best. Works Cited Barber, Ben. â€Å"The POW Predicament. The American Legion. 1  Aug. 2002:  (pg 1). Career and Technical Education,  ProQuest. Canyon Ridge High School Library. 17 Feb. 2010. lt; http://proquest. umi. com Katel, Peter, and Kenneth Jost. â€Å"Treatment of Detainees. † CQ Researcher 16: 29 (25 Aug 2006): 673-696. (pg6) CQ Researcher Online. 17 Feb. 2010 . Masci, David, and Patrick Marshall. â€Å"Civil Liberties in Wartime. † CQ Researcher 11: 43 (14 Dec 2001): 1017-1040. CQ Researcher. 17 Feb. 2010 . Masci, David. â€Å"Torture. † CQ Researcher. 13: 15 (18 April 2003): 345-368. (pg 3, 4,5) CQ Researcher. 17 Feb. 2010. http://library. cqpress. com/cqresearcher/cqresrre2003041800 How to cite Pro Terrorist Torture, Papers

Basic Electronics free essay sample

The p-n junction is a homojunction between a p-type and an n-type semiconductor. It acts as a diode, which can serve in electronics as a rectifier, logic gate, voltage regulator (Zener diode), switching or tuner (varactor diode); and in optoelectronics as a light-emitting diode (LED), laser diode, photodetector, or solar cell. In a relatively simplified view of semiconductor materials, we can envision a semiconductor as having two types of charge carriers-holes and free electrons which travel in opposite directions when the semiconductor is subject to an external electric field, giving rise to a net flow of current in the direction of the electric field. Figure 1 illustrates the concept. A p-n junction consists of a p-type and n-type section of the same semiconductor materials in metallurgical contact. The p-type region has an abundance of holes (majority carriers) and a few mobile electrons (minority carriers); the n-type region has an abundance of mobile electrons and a few holes (Fig. 2). Both charge carriers are in continuous random thermal motion in all directions. Fig. 2. Energy levels and carrier concentrations for a p-type and n-type semiconductor before contact. 1 When a section of p-type material and a section of n-type material are brought in contact to form a pn junction, a number of interesting properties arise. The pn junction forms the basis of the semiconductor diode. Electrons and holes diffuse from areas of high concentration toward areas of low concentration. Thus, electrons diffuse from the n-region to the p-region. , leaving behind positively charged ionized donor atoms. In the p-region the electrons recombine with the abundant holes. Similarly, holes diffuse from the p-region into the n-region, leaving behind negatively charged ionized acceptor atoms. In the n-region the holes recombine with the abundant mobile electrons. This diffusion process does not continue indefinitely, however, because it causes a disruption of the charge balance in the two regions. As a result, a narrow region on both sides of the junction becomes nearly depleted of the mobile charge carriers. This region is called the depletion layer. It contains only the fixed charges (positive ions on the n-side and negative ions on the p-side). The thickness of the depletion layer in each region is inversely proportional to the concentration of dopants in the region. The net effect is that, the depletion region sees a separation of charge, giving rise to an electric field pointing from the n side to the p side. The fixed charges create an electric field in the depletion layer that points from the n-side towards the p-side of the junction. The charge separation therefore causes a contact potential (also known as built-in potential) to exist at the junction. This built-in field obstructs the diffusion of further mobile carriers through the junction region. An equilibrium condition is established that results in a net contact potential difference Vo between the two sides of the depletion layer, with the n-side exhibiting a higher potential than the p-side. This contact potential is typically on the order of a few tenths of a volt and depends on the material (about 0. 5 to 0. 7 V for silicon). The built-in potential provides a lower potential energy for an electron on the n-side relative to the p-side. As a result, the energy bands bend as shown in Fig. 3. In thermal equilibrium there is only a single Fermi function for the entire structure so that the Fermi levels in the p- and the n-regions must align. No net current flows across the junction. The currents associated with the diffusion and built-in field (drift current) cancel for both the electrons and holes. Fig. 3. A p-n junction in the Thermal equilibrium at T gt; 0? K. The depletion-layer, energy-band diagram, and concentrations (on a logarithmic scale) of the mobile electrons n(x) and holes p(x) are shown as a functions of the position x. The built-in potential difference V corresponds to the energy eV where e is the electron charge. 0 0 2 The Biased p-n Junction An externally applied potential will alter the potential difference between the p- and n-regions. This in turn will modify the flow of majority carriers, so that the junction can be used as a â€Å"gate†. If the junction is forward biased by applying a positive voltage V to the p-region (Fig. 4), its potential is increased with respect to the n-region, so that an electric field is produced in a direction opposite to that of the built-in field. The presence of the external bias voltage causes a departure from equilibrium and a misalignment of the Fermi levels in the p- and n-regions, as well as in the depletion layer. The presence of the two Fermi levels in the depletion layer, Efc and Efv represents a state of quasi-equilibrium. Fig. 4. Energy band diagram and carrier concentrations for a forward-biased p-n junction. In effect, then, if one were to connect the two terminals of the p-n junction to form a closed circuit, two currents would be present. First, a small current, called reverse saturation current, is, exists because of the presence of the contact potential and the associated electric field. In addition, it also happens that holes and free electrons with sufficient thermal energy can cross the junction. This current across the junction flows opposite to the reverse saturation current and is called diffusion current. Of course, if a hole from the p side enters, it is quite likely that it will quickly recombine with one of the n-type carriers on the n side. (Fig. 4) The net effect of the forward bias is to reduce the height of the potential-energy hill by an amount eV. The majority carrier current turns out to increase by an exponential factor exp(eV/kT). So that the net current becomes i = isexp(eV/kT) – is, where is is nearly a constant. The excess majority carrier holes and electrons that enter the n and p regions, respectively, become minority carriers and recombine with the local majority carriers. To explain the mechanism of reverse conduction, one needs to visualize the phenomenon of avalanche breakdown. When a very large negative bias is applied to the p-n junction, sufficient energy is imparted to charge carriers that reverse current can flow, well beyond the normal reverse, saturation current. In addition, because of the large electric field, electrons are energized to such levels that if they collide with other charge carriers at a lower energy level, some of their energy is transferred to the carriers with low energy, 4 and these can now contribute to the reverse conduction process, as well. This process is called impact ionization. Now, these new carriers may also have enough energy to energize other lowenergy electrons by impact ionization, so that once a sufficiently high reverse bias is provided, this process of conduction takes place very much like an avalanche: a single electron can ionize several others. Fig. 6. The reverse breakdown region The phenomenon of Zener breakdown is related to avalanche breakdown. It is usually achieved by means of heavily doped regions in the neighbourhood of the metal-semiconductor junction (the ohmic contact) . The high density of charge carriers provides the means for a substantial reverse breakdown current to be sustained at a much lower specific voltage than normal diode, at a nearly constant reverse bias known as the Zener voltage, Vz. This phenomenon is very useful in applications where one would like to hold some load voltage constant for example, in voltage regulators. The response time of a p-n junction to a dynamic (ac) applied voltage is determined by solving the set of differential equations governing the processes of electrons and hole diffusion, drift (under the influence of the built-in and external electric fields), and recombination. These effects are important for determining the speed at which the diode can be operated. They may be conveniently modeled by two capacitances, a junction capacitance and diffusion capacitance, in parallel with an ideal diode. The junction capacitance for the time necessary to change the fixed positive and negative charges stored in the depletion layer when the applied voltage changes. The thickness l of the depletion layer turns out to be proportional to v(Vo-V); it therefore increases under the reverse-bias conditions (negative V) and decreases under the forward-bias conditions (positive V). The junction capacitance C=ЄA/l (where A is the area of the junction) is therefore inversely proportional to v(VoV). The junction capacitance of a reverse-biased diode is smaller (and the RC response time is therefore shorter) than that of a forward-biased diode. The dependence of C on V is used to make voltage-variable capacitors (varactors). 5 Experiment l(a) : i-v characteristics of a semiconductor diode Procedure Connect the diode according to the circuit diagram as shown in Fig. 8. Fig 8 Vary the voltage V on the power supply between 0-30V. Alternately, the second concept is that the blocking action of an inductor stops the a. c. portion while the d. c. portion passes without much attenuation. Note: For filtering, large capacitance (hundreds to tens of hundreds microfarad) is needed. These are generally electrolytic capacitors, which consist of a repeating sandwich of aluminum sheets and a conducting paste, rolled into a cylinder for miminmun size. The aluminum sheets are polarized to form thin layers of aluminum oxide, a dielectric insulating material. The thinner the the dielectric the higher the capacitance will be.