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Kitaw Ejigu
Kitaw Ejigu ; 25 February 1948 – 13 January 2006) was an American scientist and politician who served as chief of spacecraft and satellite systems engineer for NASA for four decades. With his co-workers, Kitaw invented spacecraft and rockets to support Planetary Science Research and Exploration. He was also among scientists who invented Flight Dynamic Simulator, Advanced Global Positioning Satellite System, and Aerospace Rocket mechanics. Before his journey to the United States, he worked as Chief technical advisor and assistant manager for Ethiopian Automotive Services and Sales Company. He was the first Aerospace scientist. Kitaw died on 13 January 2006 after having a stroke on 8 January 2006. Early life Kitaw was born in Bonga, Keffa province, Ethiopia on 25 February 1948 from his father Ejigu Haile and mother Askale Belayneh. After completing his primary and secondary education in Bonga, Waka and Jimma, Kitaw attended his higher education at the Polytechnic Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonga
Bonga is a town, woreda and capital of the South West Ethiopia Peoples' Region in Ethiopia. Located in the Keffa Zone upon a hill in the upper Barta valley, it has a latitude and longitude of with an elevation of 1,714 meters above sea level. Not confused with another town named "Bonga", near Gambela Region. Overview The neighboring area is known for hot springs, caves and waterfalls. There are fourteenth century ruins associated with the former Kingdom of Kaffa. As part of the extensive road-building program started before the Italian invasion, the Ethiopian Transport Company built a large steel bridge at Bonga. The all-weather road from Jimma south to Bonga was completed around 1962. The road to Mizan Teferi and Tepi was improved in 1966 by the Highway Authority. The Apostolic Prefecture of Jimma–Bonga is based in this town. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight Dynamics (spacecraft)
Spacecraft flight dynamics is the application of mechanical dynamics to model how the external forces acting on a space vehicle or spacecraft determine its flight path. These forces are primarily of three types: propulsive force provided by the vehicle's engines; gravitational force exerted by the Earth and other celestial bodies; and aerodynamic lift and drag (when flying in the atmosphere of the Earth or other body, such as Mars or Venus). The principles of flight dynamics are used to model a vehicle's powered flight during launch from the Earth; a spacecraft's orbital flight; maneuvers to change orbit; translunar and interplanetary flight; launch from and landing on a celestial body, with or without an atmosphere; entry through the atmosphere of the Earth or other celestial body; and attitude control. They are generally programmed into a vehicle's inertial navigation systems, and monitored on the ground by a member of the flight controller team known in NASA as the flight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spacecraft
A spacecraft is a vehicle or machine designed to fly in outer space. A type of artificial satellite, spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket). On a sub-orbital spaceflight, a space vehicle enters space and then returns to the surface without having gained sufficient energy or velocity to make a full Earth orbit. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers from start or on orbit (space stations) only, whereas those used for robotic space missions operate either autonomously or telerobotically. Robotic spacecraft used to support scientific re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerospace Engineering
Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: aeronautical engineering and astronautical engineering. Avionics engineering is similar, but deals with the electronics side of aerospace engineering. "Aeronautical engineering" was the original term for the field. As flight technology advanced to include vehicles operating in outer space, the broader term "aerospace engineering" has come into use. Aerospace engineering, particularly the astronautics branch, is often colloquially referred to as "rocket science". Overview Flight vehicles are subjected to demanding conditions such as those caused by changes in atmospheric pressure and temperature, with structural loads applied upon vehicle components. Consequently, they are usually the products of various technological and engineering disciplines including aerodynamics, Air propulsion, avionics, materials science, stru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctor Of Philosophy
A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common Academic degree, degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is an earned research degree, those studying for a PhD are required to produce original research that expands the boundaries of knowledge, normally in the form of a Thesis, dissertation, and defend their work before a panel of other experts in the field. The completion of a PhD is often a requirement for employment as a university professor, researcher, or scientist in many fields. Individuals who have earned a Doctor of Philosophy degree may, in many jurisdictions, use the title ''Doctor (title), Doctor'' (often abbreviated "Dr" or "Dr.") with their name, although the proper etiquette associated with this usage may also be subject to the professional ethics of their own scholarly field, culture, or society. Those who teach at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Business Administration
Business administration, also known as business management, is the administration of a commercial enterprise. It includes all aspects of overseeing and supervising the business operations of an organization. From the point of view of management and leadership, it also covers fields that include office building administration, accounting, finance, designing, development, quality assurance, data analysis, sales, project management, information-technology management, research and development, and marketing. Overview The administration of a business includes the performance or management of business operations and decision-making, as well as the efficient organization of people and other resources to direct activities towards common goals and objectives. In general, "administration" refers to the broader management function, including the associated finance, personnel and MIS services. Administration can refer to the bureaucratic or operational performance of routine of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master Of Arts
A Master of Arts ( la, Magister Artium or ''Artium Magister''; abbreviated MA, M.A., AM, or A.M.) is the holder of a master's degree awarded by universities in many countries. The degree is usually contrasted with that of Master of Science. Those admitted to the degree have typically studied subjects within the scope of the humanities and social sciences, such as history, literature, languages, linguistics, public administration, political science, communication studies, law or diplomacy; however, different universities have different conventions and may also offer the degree for fields typically considered within the natural sciences and mathematics. The degree can be conferred in respect of completing courses and passing examinations, research, or a combination of the two. The degree of Master of Arts traces its origins to the teaching license or of the University of Paris, designed to produce "masters" who were graduate teachers of their subjects. Europe Czech Republic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automotive Engineering
Automotive engineering, along with aerospace engineering and naval architecture, is a branch of vehicle engineering, incorporating elements of mechanical, electrical, electronic, software, and safety engineering as applied to the design, manufacture and operation of motorcycles, automobiles, and trucks and their respective engineering subsystems. It also includes modification of vehicles. Manufacturing domain deals with the creation and assembling the whole parts of automobiles is also included in it. The automotive engineering field is research intensive and involves direct application of mathematical models and formulas. The study of automotive engineering is to design, develop, fabricate, and test vehicles or vehicle components from the concept stage to production stage. Production, development, and manufacturing are the three major functions in this field. Disciplines Automobile engineering Automobile engineering is a branch study of engineering which teaches manufacturing, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans Japanese archipelago, an archipelago of List of islands of Japan, 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa Island, Okinawa. Tokyo is the Capital of Japan, nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the List of countries and dependencies by population, eleventh most populous country in the world, as well as one of the List of countries and dependencies by population density, most densely populated and Urbanization by country, urbanized. About three-fourths of Geography of Japan, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineering
Mechanical engineering is the study of physical machines that may involve force and movement. It is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches. Mechanical engineering requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bahir Dar
Bahir Dar ( amh, ባሕር ዳር, 3=sea shore) is the capital city of Amhara Region, Ethiopia. Bahir Dar is one of the leading tourist destinations in Ethiopia, with a variety of attractions in the nearby Lake Tana and Blue Nile river. The city is known for its wide avenues lined with palm trees and a variety of colorful flowers. In 2002, it was awarded the UNESCO Cities for Peace Prize for addressing the challenges of rapid urbanization. History Origins Originally the settlement was called Bahir Giyorgis. Between 1810 and 1900, Bahir Dar had 1,200 to 2,000 inhabitants.Crummey, D. (1987) Towns in Ethiopia: The eighteenth and nineteenth centuries. In: Ahmed Zekaria, B. Z. T. B. (ed.) Proceedings of the International Symposium of the Centenary of Addis Abeba, November 24-25, 1986., pp. 130–144. Seltene Seyoum (2000Land Alienation and the Urban Growth of Bahir Dar 1935-74. In: Anderson, D. M. & Rathborne, R. (eds.) Africa’s urban past. James Currey, Oxford./ref> It was devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jimma
Jimma () is the largest city in southwestern Oromia Region, Ethiopia. It is a special zone of the Oromia Region and is surrounded by Jimma Zone. It has a latitude and longitude of . Prior to the 2007 census, Jimma was reorganized administratively as a special Zones of Ethiopia, Zone. History What is now Jimma's northern suburb of Jiren (city), Jiren was the capital of a large Kingdom of Kaffa, Kaffa province until the Oromos migrated to the region in the 18th century. Originally named ''Hirmata'' before the Oromo invasion. The city owed its importance in the 19th century to being located on the caravan route between Shewa and the Kingdom of Kaffa, as well as being only six miles from the palace of the king of Kingdom of Jimma, Jimma. According to Donald Levine, in the early 19th century the market attracted thousands of people from neighboring regions: "Amhara from Gojjam and Shoa, Oromo from all the Gibe Kingdoms and numerous representatives of the Lacustrine and Omotic grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
