B-52 Stratofortress - Strategic Air Command

B-52 Stratofortress - Strategic Air Command On November 23, 1945, only weeks after the end of World War II, the US Air Material Command issued performance specifications for a new long-range, nuclear bomber. Calling for a cruising speed of 300 mph and a combat radius of 5,000 miles, AMC invited bids the following February from Martin, Boeing, and Consolidated. Developing the Model 462, a straight-wing bomber powered by six turboprops, Boeing was able to win the competition despite the fact that the aircrafts range fell short of the specifications. Moving forward, Boeing was issued a contract on June 28, 1946, to build a mock-up of the new XB-52 bomber. Over the next year, Boeing was forced to change the design several times as the US Air Force first showed concern over the XB-52s size and then increased the required cruising speed. By June 1947, the USAF realized that when complete the new aircraft would nearly be obsolete. While the project was put on hold, Boeing continued to refine their latest design. That September, the Heavy Bombardment Committee issued new performance requirements demanding 500 mph and an 8,000-mile range, both of which were far beyond Boeings latest design. Lobbying hard, the president of Boeing, William McPherson Allen, was able to prevent their contract from being terminated. Coming to an accord with the USAF, Boeing was instructed to begin exploring recent technological advances with an eye to incorporating them into the XB-52 program. Moving forward, Boeing presented a new design in April 1948, but was told the next month that the new aircraft should incorporate jet engines. After swapping out turboprops for jets on their Model 464-40, Boeing was ordered to design a completely new aircraft utilizing the Pratt Whitney J57 turbojet on October 21, 1948. A week later, Boeing engineers first tested the design that would become the basis for the final aircraft. Possessing 35-degree swept wings, the new XB-52 design was powered by eight engines placed in four pods under the wings. During testing, concerns arose regarding the fuel consumption of the engines, however the commander of the Strategic Air Command, General Curtis LeMay insisted the program move forward. Two prototypes were built and the first flew on April 15, 1952, with famed test pilot Alvin Tex Johnston at the controls. Pleased with the result, the USAF placed an order for 282 aircraft. B-52 Stratofortress - Operational History Entering operational service in 1955, the B-52B Stratofortress replaced the Convair B-36 Peacemaker. During its initial years of service, several minor issues arose with the aircraft and the J57 engines experienced reliability problems. A year later, the B-52 dropped its first hydrogen bomb during testing at Bikini Atoll. On January 16–18, 1957, the USAF demonstrated the bombers reach by having three B-52s fly non-stop around the world. As additional aircraft were built, numerous changes and modifications were made. In 1963, the Strategic Air Command fielded a force of 650 B-52s. With the US entry into the Vietnam War, the B-52 saw its first combat missions as part of Operations Rolling Thunder (March 1965) and Arc Light (June 1965). Later that year, several B-52Ds underwent Big Belly modifications to facilitate the aircrafts use in carpet bombing. Flying from bases in Guam, Okinawa, and Thailand, B-52s were able to unleash devastating firepower on their targets. It was not until November 22, 1972, that the first B-52 was lost to enemy fire when an aircraft was downed by a surface-to-air missile. The B-52s most notable role in Vietnam was during Operation Linebacker II in December 1972, when waves of bombers struck targets across North Vietnam. During the war, 18 B-52s were lost to enemy fire and 13 to operational causes. While many B-52s saw action over Vietnam, the aircraft continued to fulfill its nuclear deterrence role. B-52s routinely flew airborne alert missions to provide a rapid first strike or retaliation capability in case of war with the Soviet Union. These missions ended in 1966, following the collision of a B-52 and a KC-135 over Spain. During the 1973 Yom Kippur War between Israel, Egypt, and Syria, B-52 squadrons were placed on a war footing in an effort to prevent the Soviet Union from becoming involved in the conflict. By the early 1970s, many of the early variants of the B-52 began to be retired. With the B-52 aging, the USAF sought to replace the aircraft with the B-1B Lancer, however strategic concerns and cost issues prevented this from occurring. As a result, B-52Gs and B-52Hs remained a part of the Strategic Air Commands nuclear standby force until 1991. With the collapse of the Soviet Union, the B-52G was removed from service and the aircraft destroyed as part of the Strategic Arms Limitation Treaty. With the launch of the coalition air campaign during the 1991 Gulf War, the B-52H returned to combat service. Flying from bases in the United States, Britain, Spain, and Diego Garcia, B-52s conducted both close air support and strategic bombing missions, as well as served as a launch platform for cruise missiles. Carpet bombing strikes by B-52s proved particularly effective and the aircraft was responsible for 40% of the munitions dropped on Iraqi forces during the war. In 2001, the B-52 again returned to the Middle East in support of Operation Enduring Freedom. Due to the aircrafts long loiter time, it proved highly effective in providing needed close air support to the troops on the ground. It has fulfilled a similar role over Iraq during Operation Iraqi Freedom. As of April 2008, the USAFs B-52 fleet consisted of 94 B-52Hs which operate from Minot (North Dakota) and Barksdale (Louisiana) Air Force Bases. An economical aircraft, the USAF intends to retain the B-52 through 2040 and has investigated several options for updating and enhancing the bomber, including replacing its eight engines with four Rolls-Royce RB211 534E-4 engines. General Specifications of the B-52H Length:  159 ft. 4 in.Wingspan:  185 ft.Height:  40 ft. 8 in.Wing Area:  4,000  sq. ft.Empty Weight:  185,000 lbs.Loaded Weight:  265,000 lbs.Crew:  5 (pilot, copilot, radar navigator (bombardier), navigator, and electronic warfare officer) Performance Power Plant:  8 Ãâ€" Pratt Whitney TF33-P-3/103 turbofansCombat Radius:  4,480 milesMax Speed:  650 mphCeiling:  50,000 ft. Armament Guns:  1 Ãâ€" 20 mm M61 Vulcan cannon (remote controlled tail turret)Bombs/Missiles:  60,000 lbs. of bombs, missiles, mines in numerous configurations Selected Sources US Air Force: B-52 StratofortressFAS: B-52 StratofortressGlobal Security: B-52 Stratofortress

Mid term Questions Assignment Example | Topics and Well Written Essays - 1000 words

Mid term Questions - Assignment Example On the other hand, computer worms do not strike a specific victim (computer). Should this happen, a state(s) or man’s civilization may retrogress by 200 years, into the pre-electricity era. Question 2 It is most likely that P2P software will be replaced by the new subscription sites such as Spotify. This is because, the fact that there are more than 22 million peers who are connected to P2P file system is likely to attract a court verdict which is inimical to the use of P2P file sharing system. Court verdicts against high-profile file-sharing systems may in turn birth the emergence of technically more superior and sophisticated platforms. This is especially the case when expedited attempts to disable P2P file systems infrastructure are made. This postulation is verified by the manner in which the shutting down of Napster changed file sharing, following a court verdict. Napster users did not deal file-sharing a coup de grace, but only gave newer and more sophisticated platforms such as KaZaa and Gnutella a larger purview. KaZaa and Gnutella also experienced the same fate in Grokster v. Supreme Court, 2005. Question 3 Lakhani postulates that the reason why Facebook is bigger than its competitors in terms of connections is partly explained by Metcalf’s Law. Originally formulated by Robert Metcalf (b. April 7, 1946), Metcalf’s Law states that a telecommunication network’s value is proportional to the square of the number of the number of users who have connected themselves into that system. To this effect, just as the value of every fax machine increases with the total sum of fax machines in the network, the total number of Facebook users with and to whom every member may posts and receives documents increases. Because of this, the greater the number of users of a social online network (Facebook) is, the more valuable Facebook services become (Lakhani, 164). Question 4 Interestingly enough, in 2006, Second Life was the future and vice ve rsa, but this is contrary to the present situation. Some of the reasons why Second Life is not the future include: technical lacunae; moral gaps; legal drawbacks; and the failure to address security concerns. According to Kane, Robinson-Combre and Berge, the technical lacunae came in the form of Second Life’s failure to budget for server resources. This is a serious failure since Second Life’s virtual real estate as an online world that is owned and run by Linden lab is used by residents who need long-term in-world content which they own, have created or both. The crux of the matter herein is that both Second Life’s residents and Linden Lab’s users make money from the former, through trading, while using virtual real estate. Thus, Second Life’s failure to budget for server resources would lead to serious legal implications which readily invited financial responsibility. For instance, the amount of land a resident owned in a region specified the num ber of objects which may be placed in the region and the area in which they may be placed. Nevertheless, alternative region servers such as network bandwidth and CPU time are seldom budgeted in like manner and thereby bringing about problematic situations (Kane, Robinson-Com

Marketing an Australian wine to Hong Kong wine market Essay

Marketing an Australian wine to Hong Kong wine market - Essay Example   The paper tells that Hong Kong is one of the most densely populated areas in the world where full-time education is mandatory between the ages of 6 and 15. More than 90% of the children complete upper secondary education and over 25.5% of the population have attended post-secondary education. This suggests that the Hong Kong population is well-educated. The Hong Kong economy is open and dynamic. Housing in Hong Kong is at a premium and hence even four generations at times live together under one roof. Moreover, Hong Kong is still a conservative society where paternalistic affiliation is given importance. Nevertheless, youth from higher income families are more likely to participate in higher cost activities outside the home, like going to theatres or listening to operas. Those from lower income families would prefer to enjoy their leisure activities at home. Thus the target segment for the marketing plan is the young adults from affluent families. As far as wine consumption is co ncerned Hong Kong is the most mature wine market in Asia. However, the older adults prefer to consume wine and not the young adults. Students in Hong Kong universities generally do not involve in alcohol against the European students where 88% of them tend to consume alcohol beverages. Only 1.4% of the Hong Kong students are regular alcohol consumers and they start consuming alcohol on an average at 15.6 years. The most popular alcoholic beverage was beer followed by table wine. Hong Kong students are influenced by their peers in consuming alcoholic beverages possibly because it is a collectivist society. Only those who have completed tertiary education consume wine, as found in a study by Dewald (2003). Higher the education level, the more likely they are to consume wine. Since the Hong Kong youth stays with their families, home consumption is minimal. Apart from the nationals, the expatriate population in Hong Kong is high. Hong Kong women so far have shown no preference for wine but that is because they do not have much idea about wines (Ong-Wood, 2011). Based on these characteristics of the Hong Kong youth, the marketing plan would be devised. Positioning strategy Lifestyle of the local population has changed due to which food retailing and catering market has also changed. There is an increased trend towards healthy, functional and organic food as the youth has become health-conscious (Austrade, 2010). Women are also turning to wine as a part of their health and beauty regime as they believe that it enhances their skin tone and digestion (HKTDC, 2010). Since Hong Kong is a collectivist society and since the youth stays with their families, wine has to be positioned as a wellness product. Wine in Hong Kong is generally consumed in social settings, in bars and restaurants (Parker, 2010). Health is now a global concern and Hong Kong consumers believe that consuming two glasses of wine is good for health. Australian wines have been receiving recognition among the traders and the consumers. So far French wines have been dominating the Hong Kong market and hence Australian company Brown Brothers has to bear this in mind. Competition prevails in the Hong

Oxidation-Reduction Series Essay Example for Free

Oxidation-Reduction Series Essay Place 10 drops of Zinc nitrate, Zn(N03)2 into well A3 of the 24-well plate. 5. Place 10 drops of Iron (Ill) chloride, FeC13 into well A4 of the 24-well plate. 6. Place 10 drops of Copper (II) sulfate, Cu S04 into well A5 of the 24-well plate. 7. Take the metal solids from your LabPaq 8. Use your tweezers to pick up and carefully insert the piece of magnesium into the sodium sulfate. Record your observations. 9. Carefully insert a piece of zinc into the magnesium sulfate. Record your observations. 10. Carefully insert a piece of lead into the zinc nitrate. Record your observations. 11. Carefully insert the lead into the iron Ill) chloride. Record your observations. 12. In the same way carefully insert the iron into the copper (II) sulfate. Record your observations. 13. Place a paper towel over the drain of your sink and pour the contents of the well plate through it. 14. Throw the paper towel and metal pieces in the trash Rinse the well plate and your Oxidation-reduction table (below) Reactions Mg Na2S04 -+ drain wit n running water. Da sodium is stronger than magnesium, turned iron duller, little amount of bubbles Zn in MgS04 Little to no reaction Less of an reaction than the Fec13, but kind of changed color Pb in FeC13 †+ Changed its color made it slimy green Fe CUS04 Completely stripped nail, turned the tip orange Conclusion I was surprised at the reaction that Iron had because although I did expect some reaction I didnt expect that much of a reaction. I was also surprise at how subtle Pb and Zinc and Pb in Iron could be, I feel that this lab was beneficial in honing our observational skills as some of the reactions where harder to see at first, such as Zinc in Magnesium. Potential Sources of Error I feel that human error could destroy this experiment because if you dont clean the well you wouldnt get an accurate response from the metal. I also thought that the pipet was hard to get the accurate amount of drops out (10). Also the time could play a role, if you recorded your observation at different points of the reduction series you might get different answers. Questions A. Based on your observations make an activity series of the metals used. List them in such a way that the most active metal is on the left and the least active metal is on the right. Remember, sodium and copper are metals, too. 1. Iron, Zinc, Lead, Magnesium B. Suppose you inserted a piece of copper into a solution of nickel chloride and bserved no reaction. Then if you inserted a piece of iron into the solution of nickel chloride a nickel deposit formed on the bottom of the well in the well plate. Where does nickel fit into your activity series? 1. Iron, Nickel, Zinc, Lead, Magnesium C. Suppose you inserted a piece of an unknown metal into a solution of zinc (II) nitrate and observed no reaction. Then if you inserted the unknown piece of the metal into the solution of iron (Ill) chloride a deposit formed on the bottom of the well in the well plate. Where does the unknown metal fit into your activity series? 1.

Reading Recovery Essay -- Research Papers Learning Education Papers

Reading Recovery The ability to read is vital to a child's success in school and throughout life. However, reading achievement in the U. S. is low. In fact, according to the most recent national assessment of educational progress, 44% of U.S. students read below the "basic" level, meaning they exhibit little or no mastery of the knowledge and skills necessary to perform work at grade level (Collins, 79). These statistics have driven school districts, parents, and students scrambling to find something to turn the tide of reading failure. They are searching for a solution that will have a lasting impact on a child's reading ability. Many have adopted the Reading Recovery Program as a viable solution to the problem. The issue to be addressed now is; Does this program provide an effective solution to the reading problem that is plaguing students of the US? I was particularly interested in this question because my eight year old daughter, Brooke, successfully completed the Reading Recovery program when she was in first grade. However, despite our efforts, her reading skills stagnated during second grade. By the beginning of third grade her teacher approached me to say something is wrong. The teacher pointed out that if Brooke successfully completed the Reading Recovery Program, then she should not be struggling like she is with reading. This was my catalyst to finding out about the effectiveness of the Reading Recovery Program. I wanted to find out if the program really produced long term results or if it was just a nice bit of one on one attention from a devoted teacher. To fairly analyze these questions, it is essential to take a glimpse into the reading problem that pervades across the US. As stated, ... ...Recovery Program is effective in raising potentially poor readers to grade level. Most of these children are able to maintain an average reading level as they progress through school. This program appears to be a viable solution. Bibliography Clay, Marie M. 1993. Reading Recovery. Reed Publishing Co. Auckland, New Zealand. Collins, James. "How Johnny Should Read." Time Magazine. October 27, 1997 Mc Guinness, Diane. "Why Our Children Can't Read." (photo copy with out the rest of the information). Personal interview: Brown, Wayne. Feb. 18, 1998 Personal interview: McMahan, Taffy. Feb. 20, 1997 Personal interview: Howard, Gwen. Feb. 20, 1997 Office of Research, Consumer Guide. December 1992. Number 3 Masters Program, Curriculum and Instruction. Reading Recovery, Illinois State University. Fax 309-438-8699

Define Culture Essay

â€Å"A person without the knowledge of their past history, origin and culture is like a tree without roots.†- Marcus Garvey. This says that a person is defined by his or her culture by the way he/she acts, thinks, and speaks. A person is defined by his or her culture by the way he or she thinks. A person see’s the world differently so the way they think and act would be distinct. They would think differently because of the different backgrounds that they have. In the story â€Å"Imagine†, it says â€Å"you may say I’m a dreamer, but I’m not the only one. I hope someday you’ll join us and the world will live as one†. John Lennon explains how people think he’s different because of what he is. He also says how people aren’t all the same but he wishes that one day we were. He wishes that one day we will all see the world the same and we would be the same. A person is defined by his or her culture by the way he or she’ s history, family tree, and he or she’s way of life. A person is defined by his or her culture because it effects the way they act or speak. In the story â€Å"Where I’m From,† George States â€Å"†¦leaf fall from the family tree†¦Ã¢â‚¬  This example from the text explains that every detail, moment, or where she is from in the poem is from her family tree. It’s saying the poem are moments or cultural things that effected her or shaped her as a person. The things she shares in the poem are all from her families history or culture (family tree). Although others may argue that culture doesn’t effect your education, other people don’t always agree,because their culture has taught them everything they know.An example on how culture defines your education is that people can attend any school , but when they are being taught, they realize that it is different from what they know. In the story, â€Å"An Indian Father’s Plea,† the protagonist argues, â€Å"My son is culturally â€Å"different.† If you ask him how many months are in a year he will probably tell you 13. He will respond this way not because he doesn’t know how to count but because he was taught by our people that there are 13 full moons in a year.† This quote demonstrates that even though he is Indian, he is culturally different because his culture has taught him what he knows. Your families history, education, and your view or the way you think all contribute on how your culture defines you. It’s obvious that any person would benefit from he or she’s culture.

The History of Skyscrapers

The first skyscrapers—tall commercial buildings with  iron or steel frameworks—came about in the late 19th and early 20th centuries. The first skyscraper is generally considered to be the Home Insurance Building in Chicago, though it was only 10 stories high. Later, taller and taller buildings were made possible through a series of architectural and engineering innovations, including the invention of the first process to mass-produce steel. Today, the tallest skyscrapers in the world are more than 100 stories and approach—and even exceed—heights of 2,000 feet. History of Skyscrapers A skyscraper is a tall commercial building with an iron or steel framework.  They were made possible as a result of the Bessemer process of mass production of steel beams.  The first modern skyscraper was created in 1885—the 10-story Home Insurance Building in Chicago.Early extant skyscrapers include the 1891 Wainwright Building in St. Louis and the 1902 Flatiron Building in New York City.   The First Skyscraper: Chicagos Home Insurance Building The first building that could be considered a skyscraper was the Home Insurance Building in Chicago, which was finished in 1885. The building was 10 stories tall and reached a height of 138 feet. Two additional stories were added in 1891, bringing the height to 180 feet. The building was demolished in 1931 and replaced with the Field Building, an even taller skyscraper with 45 stories. Early Skyscrapers The Flat Iron Building, NYC. Barry Neal/Getty Images Although the first skyscrapers were relatively small by todays standards, they marked an important turn in urban construction and development. Some of the most notable structures in the early history of skyscrapers were: Tacoma Building (Chicago): Constructed using a riveted iron and steel frame, the Tacoma Building was designed by the major architectural firm Holabird Root.Rand McNally Building (Chicago): The Rand McNally Building, completed in 1889, was the first skyscraper built with an all-steel frame.The Masonic Temple Building (Chicago): Featuring commercial, office, and meeting spaces, the Masonic Temple was completed in 1892. For a time it was the tallest building in Chicago.Tower Building (New York City): The Tower Building, completed in 1889, was the first skyscraper in New York City.American Surety Building (New York City): At 300 feet tall, this 20-story building broke Chicagos height record when it was completed in 1896.New York World Building (New York City): This building was home to the New York World newspaper.Wainwright Building (St. Louis): This skyscraper, designed by Dankmar Adler and Louis Sullivan, is famous for its terracotta facade and ornamentation.Flatiron Building (New Yo rk City): The Flatiron Building is a triangular, steel-frame marvel that still stands in Manhattan today. In 1989, it was made a National Historic Landmark. Mass-Produced Steel Allows for Construction of Skyscrapers Henry Bessemer. clu/Getty Images Construction of skyscrapers was made possible thanks to Englishman Henry Bessemer, who invented the first process to mass-produce steel inexpensively. An American, William Kelly, had held a patent for a system of air blowing the carbon out of pig iron, but bankruptcy forced Kelly to sell his patent to Bessemer, who had been working on a similar process for making steel. In 1855, Bessemer patented his own decarbonization process, utilizing a blast of air. This breakthrough in the production of steel opened the door for builders to start making taller and taller structures. Modern steel today is still made using technology based on Bessemers process. While â€Å"the Bessemer process† kept Bessemer’s name well-known long after his death, lesser known today is the man who actually employed that process to create the first skyscraper: George A. Fuller.  Throughout the 19th century, construction techniques had called for outside walls to carry the load of a building’s weight. Fuller, however, had a different idea. He realized that buildings could bear more weight—and therefore soar higher—if he used Bessemer steel beams to give buildings a load-bearing skeleton on the inside of the building. In 1889, Fuller erected the Tacoma Building, a successor to the Home Insurance Building that became the first structure ever built where the outside walls did not carry the weight of the building. Using Bessemer steel beams, Fuller developed a technique for creating steel cages that would be used in subsequent skyscrapers. Taller buildings were also made possible through the invention of the electric elevator in 1883, which reduced the amount of time it took to travel between floors. Also impactful was the invention of electric lighting, which made it easier to illuminate larger spaces. Chicago School of Architecture Many of the earliest skyscrapers were built in an architectural style that came to be known as the Chicago School. These steel-frame structures often featured terra cotta exteriors, plate glass windows, and detailed cornices. Architects associated with the Chicago School include Dankmar Adler and Louis Sullivan (who designed the old Chicago Stock Exchange Building), Henry Hobson Richardson, and John Wellborn Root. Contrary to its name, the Chicago style reached far beyond the American midwest—buildings in the Chicago style were built in places as far away as Florida, Canada, and New Zealand.