Drones: Unmanned Aerial Vehicles Essay -- UAVs Technology Essays

Like much of today’s technology, Unmanned Aerial Vehicles attribute their creation to the military. The idea of using unmanned aircraft has long been a dream for the military -- scouting planes without any casualties to report should something go wrong, air strikes with only time and money to lose, and the ability to wage war without losing a single life. Well the third one may perhaps not be realistic – as Afghanistan has shown, lack of ground troops leaves certain entities unchecked.1 However, it may be argued that â€Å"they represent a significant step toward the eventual automation of the battlefield—one in which teleoperated or robotic systems replace many soldiers.†2 Either way, these machines do create a less expensive and more dispensable alternative to conventional air battles. This creates obvious moral issues, as the country with such technology is no longer as tentative to engage in armed combat. UAVs can do many things that conventional aircraft cannot. As Steven Ashley puts it, â€Å"’Traditional’ aircraft—fast photo/ reconnaissance fighters, high-flying U-2s, and sensor-laden patrol planes—nor the classified orbital spy satellites can do the job of the simple, prop-driven unmanned aerial vehicles.†3 These advantages, coupled with their low expense, place them in great demand. As Ronald R. Fogelman (U.S. Air Force Chief of Staff) states, â€Å"We are now impressed by the convergence of technological advances in computers, flight controls, lightweight materials, advanced electric motors, and communications packages that will make modern UAVs extremely effective.†4 UAVs are not only to be used for such questionable moral circumstances as war; these vehicles can provide a plethora of services in the commercial market. H... ...chanical Engineering 125 (2003): 11. 52 Steven Ashley, â€Å"Robot Spy Planes Peer Over the Horizon,† Mechanical Engineering 118 (1996): 91. 53 Brian P. Tice, â€Å"Unmanned Aerial Vehicles,† Airpower Journal 5 (1991): 48. Works Cited Max Boot, â€Å"The New American Way of War,† Foreign Affairs 82 (2003): 41. Brian P. Tice, â€Å"Unmanned Aerial Vehicles,† Airpower Journal 5 (1991): 41. Christopher M. Centner, â€Å"Consigning Air Bases to the Dustbin of History,† Airpower Journal 12 (1998): 100. John Degaspari, â€Å"Flying Blind,† Mechanical Engineering 125 (2003): 10. Steven Ashley, â€Å"Robot Spy Planes Peer Over the Horizon,† Mechanical Engineering 118 (1996): 84. Tom Clarke, â€Å"Flying Free,† Nature 417 (2002): 582. http://www.fas.org/irp/program/collect/uav.htm = info http://uav.wff.nasa.gov/ = info http://www.twofaces.net/newpage/1337hum1r/ = background

african history :: essays research papers

Zuni Lucero and Simon Ortiz make compelling points in their papers. They talk about the differences in the two cultures. How they changed schools and saw both sides of their ever changing world at a young age. How being integrated into a white community changed them, and how they felt some what of an outsider going back to their native communities. Threw their writing they can elaborate and share these experiences to those of us who have only one culture to fit into.   Ã‚  Ã‚  Ã‚  Ã‚  We all can relate to changing schools or even starting school for the first time. One who has never experienced this can only imagine being of a different culture, speaking a different language, looking differently and being the â€Å"new kid.† Lucero best describes this when she states, â€Å"Made conscious of the â€Å"otherness† of Indians, my world began to divide into a world of Us and Them.† Ortiz tells about her struggle in school to not speak a language he was accustoming to. â€Å"Children in school were punished and looked upon with disdain if they did not speak and learn English quickly and smoothly.† (30) He also uses the words â€Å"corporal punishment† and â€Å"ostracism† to describe the feeling, and possibly real, threats he lived with if he did not abide by the rules being forced on them. (30) This would be more than enough for any one to rebel, but he did not. One thing that stood out in his description o f what he was enduring was the love he had for language. He states, â€Å"I loved language, the sound, meaning, and magic of language.† (30)   Ã‚  Ã‚  Ã‚  Ã‚  Lucero connected with me she was telling about her adventure of seeing snow for the first time, and the different structures of the houses for what she was use to in her community. If one had not seen a paved road in their life, it would be a strange site. (30) The thought of what these people endured should enrage most of us. Think about our children being called â€Å"stupid Indian/savages.† There would be some one fighting in the street or some one suing some one else. Who could these people fight, an entire nation? Who would they sue, the government? It has been made clear that most of these people’s rights had been taken away. They were forced to conform or be ridiculed. Ortiz says it best with â€Å"†¦ the intent of U. african history :: essays research papers Zuni Lucero and Simon Ortiz make compelling points in their papers. They talk about the differences in the two cultures. How they changed schools and saw both sides of their ever changing world at a young age. How being integrated into a white community changed them, and how they felt some what of an outsider going back to their native communities. Threw their writing they can elaborate and share these experiences to those of us who have only one culture to fit into.   Ã‚  Ã‚  Ã‚  Ã‚  We all can relate to changing schools or even starting school for the first time. One who has never experienced this can only imagine being of a different culture, speaking a different language, looking differently and being the â€Å"new kid.† Lucero best describes this when she states, â€Å"Made conscious of the â€Å"otherness† of Indians, my world began to divide into a world of Us and Them.† Ortiz tells about her struggle in school to not speak a language he was accustoming to. â€Å"Children in school were punished and looked upon with disdain if they did not speak and learn English quickly and smoothly.† (30) He also uses the words â€Å"corporal punishment† and â€Å"ostracism† to describe the feeling, and possibly real, threats he lived with if he did not abide by the rules being forced on them. (30) This would be more than enough for any one to rebel, but he did not. One thing that stood out in his description o f what he was enduring was the love he had for language. He states, â€Å"I loved language, the sound, meaning, and magic of language.† (30)   Ã‚  Ã‚  Ã‚  Ã‚  Lucero connected with me she was telling about her adventure of seeing snow for the first time, and the different structures of the houses for what she was use to in her community. If one had not seen a paved road in their life, it would be a strange site. (30) The thought of what these people endured should enrage most of us. Think about our children being called â€Å"stupid Indian/savages.† There would be some one fighting in the street or some one suing some one else. Who could these people fight, an entire nation? Who would they sue, the government? It has been made clear that most of these people’s rights had been taken away. They were forced to conform or be ridiculed. Ortiz says it best with â€Å"†¦ the intent of U.

Chem 101 Lab Report 2 Essay

Mixtures are made up of substances or components. If the mixture is fairly uniform in composition, properties, and its overall appearance, it is homogenous. If the component parts are clearly separated, it is heterogeneous. In order to identify the components in a mixture, methods must be used to sort out the components. However, the same methods will not work for sorting all substances. Four different processes would be employed to sort soluble and insoluble components in the following experiment. Introduction Matter that people encounter in everyday life consists of mixtures of different substances. Mixtures are combinations of two or more substances in which each substance retains its own chemical identity and therefore the original properties are maintained. The substances making up a mixture are called its components. According to our General Chemistry book, there are two types of mixtures; homogeneous and heterogeneous. Homogeneous mixtures are those that are uniform in composition, properties, and appearance throughout. Heterogeneous mixtures do not have the same composition, properties and appearance. Mixtures are characterized by two different properties: each of the substances in the mixture retains its chemical identity and mixtures are separable into these components by physical means, from heating, freezing, drying, etc. If one of the substances in a mixture exceeds the amounts of the other substances in the mixture you call it an impure substance and the other substances in th e mixture are impurities. The preparation of compounds usually involves their separation or isolation from reactants or other impurities. The separation of the components of mixtures is based upon the fact that each component has different physical properties. The components of mixtures are always pure substances, either compounds or elements and each pure substance will possess a unique set of properties. Similarly, every crystal of a pure substance melts at a specific temperature and a given pressure, and every pure substance boils at a specific temperature and a given pressure. There are four different methods of separation depending upon differences in physical properties. They are decantation, filtration, extraction, sublimation. In decantation, a liquid is separated from a solid by gently pouring the liquid from the solid so the only the solid remains in the container. Filtration is the process of separating a solid from a liquid by using a porous substance (a filter). Filtration allows the liquid but not the solid to pass through, again, leaving behind the insoluble substance. Extraction separates a substance from a mixture by choosing to dissolve that substance in a suitable solvent (usually water). Sublimation happens when a solid passes directly to the gaseous state and back to the solid state without passing through the intermediary liquid state. Material and Methods ï‚ · Evaporating Dish ï‚ · Beaker ï‚ · 3.0 Grams of mixture (NH4Cl – ammonium chloride, NaCl – sodium chloride, SiO2 – silicon dioxide) ï‚ · Heat plate ï‚ · Balance ï‚ · Oven ï‚ · Stirring rod ï‚ · 15 mL water x 2 = 30 mL water 1. Obtain mass of evaporating dish. 2. Add 3.0 grams of mixture (NH4Cl – ammonium chloride, NaCl – sodium chloride, SiO2 – silicon dioxide) to the evaporating dish and weigh to obtain mass of evaporating dish and sample mixture. 3. Subtract mass of evaporating dish from mass of original sample to get mass of original sample. 4. Place dish with sample onto heat plate to sublime the NH4Cl. 5. Remove from heat to cool mixture then weigh again. The difference in mass of evaporating dish and sample prior to heating and after heating represents the amount of NH4Cl in the mixture. 6. Obtain mass of beaker using the balance. 7. Add 15 mL of H20 to the mixture in the evaporating dish and stir gently 8. Decant the liquid into the beaker making sure not to transfer any of the solid into the beaker. 9. Add another 15 mL of H20 to the mixture in the evaporating dish and stir gently. Decant the liquid again into the beaker making sure not to transfer any of the solid into the beaker to extract NaCl. 10. Place beaker with sodium chloride solution onto heat plate and heat until water evaporates. Remove from heat and allow to cool. Weigh beaker. Difference between this weight and the weight of the empty beaker is the amount of NaCL in the mixture. 11. Take evaporating dish with SiO4 and heat until dry in oven. Once dry, remove evaporating dish from oven and allow to cool. Obtain the mass of SiO2 by weighting the evaporating dish with cooled mixture and subtracting mass of empty evaporating dish obtained earlier. 12. Find percent of NH4Cl, NaCl, and SiO2 in mixture by taking mass of each substance and dividing by the mass of the original sample. Results: Separation of the Components of a Mixture A. Mass of Evaporating Dish and Original Sample 41.606 g Mass of evaporating dish 38.859 g Mass of original sample 2.747 g Mass of evaporating dish after subliming NH4Cl 41.466 g Mass of NH4Cl 0.14 g Percent of NH4Cl 5.096 % % NH4Cl = 0.14 g / 2.747 g * 100% = 5.096 % B. Mass of Evaporating Dish, Watch Glass and NaCl 106.521 g Mass of evaporating dish and beaker 105.214 g Mass of NaCl 1.307 g Percent of NaCl 45.32 % % NaCl = 1.307 g / 2.747 g * 100% = 45.32 % C. Mass of Evaporating Dish and SiO2 40.104 g Mass of evaporating dish 38.859 g Mass of SiO2 1.245 g Percent of SiO2 45.322 % % SiO2 = 1.245 g / 2.747 g * 100% = 45.322 % D. Mass of Original Sample 2.747 g Mass of determined (NH4Cl + NaCl + SiO2) 2.692 g Differences in these weights 0.055 g Percent recovery of matter 97.997 % % recovery of matter = 2.692g /2.747g = 97.997 % Account for our errors about 2% Discussion The first step in the experiment required using the oven to heat the mixture, with ammonium chloride, sodium chloride, and silicon dioxide in the evaporating dish, until â€Å"white fumes were no longer form[ed],† according to the lab description. The goal was to sublimate the ammonium chloride, as it is not water soluble. It took about fifteen minutes to sublimate the NH4Cl. The dish had to cool as well when it came out of the oven. The mass of the dish contents were weighed and subtracted from the mass off the starting mass of the dish and the original mixture. The result was the loss of NH4Cl. Errors could have resulted from incorrectly weighing the original and ending samples. If ample time was not given to the sublimating process, NH4Cl may not have completely left the dish, the weight would not just include the mass of the other two substances. The next stage required careful decantation and stirring to remove only the liquid into a separate dish. The goal was to leave b ehind the insoluble substance, sand, and pour off the soluble NaCl. It was possible to accidentally remove particles of sand into the solution, which would influence the mass calculation of the two dishes. If stirring was not rigorous enough and water was not repeatedly added to sort out the sand from the liquid, there was a potential for sand staying behind as well. The final stage was to use the heating unit to evaporate the water from the solution to leave behind NaCl. At the same time, the heating unit was used to dry the sodium chloride in another dish. A calculation was made between the mass of the empty evaporating dish and the watch glass to reveal the mass of NaCl. Errors at this stage probably resulted from inaccurate readings on the scale or not drying the samples completely. The final stage of the experiment was to isolate the sand and calculate its mass. By this late stage, any errors in measurement, timing and calculations would have trickled down to the final remaining substance. The percentage of accuracy of the three components in the experiment should total 99%. If the percentage was less than that, â€Å"you have been sloppy† according to the lab manual. Conclusion In this experiment, it became apparent that what appears to be a simple mixture of elements is really more complicated. Heterogeneous mixtures may appear to be random collections of single substances, but when they are sorted into their components, the homogeneous elements can be observed. This was the case with this experiment. The original mixture had three substances: NaCl, NH4Cl, and SiO2. By using four methods, decantation, filtration, extraction, and sublimation, the separate components in the mixture could be isolated and weighed. If proper techniques in weighing, and using the four methods of sorting were observed and applied, the result would be three separated substances and calculations that matched those substances. The final calculation confirmed that our three substances, when sorted out, would all combine to weigh something close to the original mixture. The margin of error was within 2% References Book: 1.Ebbing, Darrel, D.; Gammon, Steven D. General Chemistry. 9th ed. Belmont, CA: Brooks/Cole Cenage Learning; 2009. 2. Beran, JA; Beran,JoAllen: Laboratory Manual for Principles of General Chemistry. 8th ed. Hoboken, NJ. Jon Wiley & Sons, Inc; 2009. 3.Katz, John C.; Treichel, Paul M.; Townsend, John. Chemistry and Chemical Reactivity. Belmont, CA: Cengage Learning, Inc.; 2009. 4.Somervill, Barbara A. Mass and Weight. Chicago, IL: Capstone Global Library, Ltd.; 2010. Electronic book: Chem Wiki:The Dynamic Chemistry Textbook. http://chemwiki.ucdavis.edu/Analytical-chemistry-html. Accessed August 29, 2013. Website: 1.Measuring Mass-Examples. http://www.harpercollege.edu/tm-ps/chm/100/dgodambe/the disk/labtech/mass2.html. 2.Jefferson Lab. http://education.jlab.org/qa/mass-09.html.

Poetry Essay: ”Peaches and cream” by Mudrooroo Essay

In this poem I shall compare and analysis two poems †peaches and cream† by mudrooroo and †last of his tribe † by oodgeroo noonuccal. The need for analyzing both poems is that they are dedicated to people who fought for the Aboriginals; only an in-depth analysis can give a clear understanding of their poems. Analysis The Last of His Tribe by Oodgeroo Noonuccal is a true example of the period of Australian poetry it consist of the paternalistic manner that is was commonly found in the Australian colonists of the 19th century , Oodgeroo Noonuccal gives emphasizes to the loneliness of an Aboriginal tribe ‘s last member. The poet’s complete focus is on the individual’s ambiguity, his suffering and his abhorrent fate. He detailed dramatization the of the thoughts which the tribe men had, he further dramatizes the memories of hunts of yore and of fights he fought. The poem carries a elegiac mood as the poet invokes a sad and bleak image of Willie Mackenzie, who is the last existing member of his tribe he pictures him as if someone were re kindling the fire of memory in the poet . The poet uses Willie Mackenzie as a symbol of the tribes that disappeared ad the culture and times that are disappearing with them (Derek p24). The poet emphasizes on elements of fauna as well as the tribe’s cultural artefact such as â€Å"boomerangs, nullah, sling as well as spear† abide with wallaroos, rocks as well as thunder. Oodgeroo Noonuccal’s memory of is the most wonderful part about the poem as it helps the poet in describing the past quite clearly: the poet gives an clear illustration of the happy hunts that this tribe experienced prior to the invasion of the white in the twentieth century era. The poem consists of thirty five lines. It is divided into seven formal verses and consists of ababb rhyming. Oodgeroo Noonuccal was expressive and assertive so much so that she was successful in drawing the reader to her persona. Due to this the reader sympathizes for Willie, exactly like the poet is particular in the line â€Å"All gone, all gone. And I feel The sudden sting of tears†. The kind of verse the poet has made use of is a formal  verse. The poet tries to give a clear picture of the Australian landscape in verse is exemplified here. Due to her tone and emotions she is successful in portraying the unique proceedings of the Australian scenery as well as their history in a regretful and sympathetic manner. Noonuccal presents, the environmental destruction which we can imagine just by reading the poem and by using the twentieth century style she shows the sad irony of their circumstances. Whereas Mudrooroo in his poems peaches and cream seems to be talking about a time when the Aboriginal people were fighting for their freedom. His tone is very a strong sad tone, a tone full of hopelessness. His poem is based a on a person who fought for their freedom, till he feel sick and his people did not support him. The way the poet highlights the likes and dislikes of this person symbolizes that he was an ordinary person who just wanted freedom for his people. The reason behind him naming the poem peaches and cream is that’s what this mans; intentions were as sweet and good as peaches and cream is. The ending of the poem is, similarly to the beginning, ambiguous. It is unclear whom the poet is referring to when he states in the first verse you like peaches and cream, And white bodies made urgent â€Å", also following with the conversional tone established in the last line. One interpretation of this is that he is expressing the realization that if things are going to progress then there is a definite need for greater unity and understanding among all Australian people, without racial division. The utilization of unique kind of rhyming makes the it a wonderful poem. The poem highlights the fact that there were people who were fighting for them so that Aborigines could also be known as â€Å"Australian† as White Australians, and the likelihood to unite the two cultures as one so that they might progress together. The use of the following lines:Perhaps one day I’ll understand,Though many didn’t and called you hypocrite;But they didn’t knowThat even Christian peaches and creamMay be sweet with a taste of injustice,And try to sweeten it more with you. (www.qsa.qld.edu.au/downloads/assessment/see_english_sub_notice_mar_08.)The above mentioned verse illustrates the fact that the composer is experiencing an inner journey as he is experiencing an internal battle. The poem consists of the poet’s strong emotional feelings for the cause which this person was fighting for, and his control to suppress this anger does not actually diminish the anger. These lines also exhibit the anger he has for people who called this freedom fighter a hypocrite; he further uses the peaches and cream as symbols of sweetness and richness that he brought to his people. The line in the last stanza shows confusion:Last night I saw you on the telly,Projecting Jesus and his message,Perhaps one day I’ll understand(www.qsa.qld.edu.au/downloads/assessment/see_english_sub_notice_mar_08.)At the beginning he states that the person he is referring to was a religious person and fought for their freedom while keeping Jesus’s message in mind. But the fact that he says that perhaps one day he will understand could mean that he does not understand the message given by the person who he is referring to , which seems very strange since throughout the poem he is clearly describing his likes and dislikes., and praising him and his efforts. Conclusion Undoubtedly then these poems clearly illustrate the eras in which they were written. Themes, craft as well as points of view reflect diverse periods the history of Australia. The enjoyable part of these poems is that they express different emotions and approach so efficiently to us nowadays when we need personal faithfulness, tribal unity and economic certainty. Work Cited: Derek Lewis; Poetry Workbook, Pascal press 2006 p24www.qsa.qld.edu.au/downloads/assessment/see_english_sub_notice_mar_08.pdf retrieved on 13 July 2008

Midterm creative response paper Term Example | Topics and Well Written Essays - 750 words

Midterm creative response - Term Paper Example Hearing the news as a family we were filed with mixed emotions as we were placed in the balance between joy for victory and fear of the unknown. Not only was the event a surprise as the ending of the war was almost instantaneous after the bombings. One thing that mainly stood out to us was that the Japanese had been defeated a long time ago, however still continued to fight. The American troops had gained control of the majority of the Japanese waters. In addition, the Japanese army had lost many troops and was experiencing financial difficulties which further increased the element of surprise when the news came that the war was over. The first question was why, after the Japanese continued to fight in such a compromising position, they decided to quit after just two bombings. We had heard some information on the nuclear bomb; however, we were not completely aware of the extent of damage it can cause. Upon hearing the news that the war was over, the primary emotion that was present among members of the community was joy and relief that the war had ended. We celebrated together with our neighbors as the conflict was long and scarred with destruction, death and terror. Many of our neighbors including our family were waiting for the return of our relatives. However, we often engaged in some concerning discussions on the sides. I was all too careful in such encounters as opinions may differ, and change the jovial atmosphere that was in the community. One question that we mainly discussed in small but close company was whether the use of nuclear weapons was justified. To a certain extent, I would say yes, the use of the atomic bomb was justified. Without the intention of using this term too loosely, all is fair in love and war. The Japanese had previously misrepresented themselves, which led to the deaths of numerous America citizens. In addition, I feel Truman was running out of opti ons as the Japanese were refusing to surrender. During

Online Banking Essay Example | Topics and Well Written Essays - 750 words

Online Banking - Essay Example Banks have had to adopt current technology in order to remain competitive, retain their customers and lower operation costs. Online banking was started in the 1980s by a few banks in the United States. Four major banks in New York adopted online banking to allow customers maintain electronic checkbook registers, check account balances, make fund transfers and other banking related activities. Online banking, also known as Internet banking, is part of virtual banking that began with telephone banking and automatic teller machines (ATMs). Virtual banking is a banking system that is non-branch based. Services are provided through various electronic media such as telephones, personal computers, ATMs and the Internet. Virtual banking has existed for quite some time and its transactions costs are quite low as compared to branch transaction costs. Banks are investing in various forms of banking systems to expand their geographical and market coverage with regards to banking systems. However, they are using different forms of banking, for example, some invest in bricks and mortar while others adopt the current ba nking system that uses the Internet (Cronin 42). The Internet is becoming the main channel of communication since its inception in 1969. Internet has recently gained popularity in the U.S. as the main medium for e-commerce. Its potential growth has come with opportunities and threats to businesses. The Internet is on the verge of becoming the main delivery and distribution channel. The growth and rapid diffusion of the Internet has made banking online an alternative banking system at the expense of traditional branch-based banking. Banks in the United States have started providing services via the Internet including Internet banking. Currently, the Internet has revolutionized the banking system and it is considered as an alternative strategic weapon that changes the operation system of banks. Banks are able to deliver services to customers in

Effects of Media on Political and Social Trust in US Article

Effects of Media on Political and Social Trust in US - Article Example From this discussion it is clear that in democratic societies like USA, media ensures the exchange of opinions and points of view between the people in power and the general public. In liberal democracy, media facilitates   public communication, informs the public, and represents the community. In democratic countries, freedom of press is guaranteed by law. The government may protect information from its public disclosure by classifying it as sensitive, classified or secret.This study outlines that people are said to have political trust when they trust the actions and intentions of the government and politicians. Uncivil exchanges during talks shows drastically reduce social trust. Talk radio can provide an unstructured outlet for public expression.  As listeners engage more and more with the medium, they become exhausted by the political system rather being motivated citizens. Thus, there is no long-term gauge on any medium to see how the media affect on trust in different time s. Social trust is a belief in the honesty, integrity and reliability of others that enables participants to act together more efficiently. Scanning the papers and watching video entertainment content enhance social trust, while examining the television news undermine trust in others.  studies have generated results that 20% of the overall public in America, have a greater impact on the political process than do those with more mixed ideological views.