Lockheed U-2 Spy Plane

Lockheed U-2 Spy Plane In the years immediately after World War II the US military relied on a variety of converted bombers and similar aircraft to collect strategic reconnaissance. With the rise of the Cold War, it was recognized that these aircraft were extremely vulnerable to Soviet air defense assets and as a result would be of limited use in determining Warsaw Pact intentions. As a result, it was determined that an aircraft capable of flying at 70,000 feet was needed as existing Soviet fighters and surface-to-air missiles were incapable to reaching that altitude. Proceeding under the codename Aquatone, the US Air Force issued contracts to Bell Aircraft, Fairchild, and Martin Aircraft to design a new reconnaissance aircraft capable of meeting their requirements. Learning of this, Lockheed turned to star engineer Clarence Kelly Johnson and asked his team to create a design of their own. Working in their own unit, known as the Skunk Works, Johnsons team produced a design known as the CL-282. This essentially married the fuselage of an earlier design, the F-104 Starfighter, with a large set of sailplane-like wings. Presenting the CL-282 to the USAF, Johnsons design was rejected. Despite this initial failure, the design soon received a reprieve from President Dwight D. Eisenhowers Technological Capabilities Panel. Overseen by James Killian of the Massachusetts Institute of Technology and including Edwin Land from Polaroid, this committee was tasked with exploring new intelligence weapons to protect the US from attack. While they initially concluded that satellites were the ideal approach for gathering intelligence, the necessary technology was still several years away. As a result, they decided that new spy plane was needed for the near future. Enlisting the aid of Robert Amory from the Central Intelligence Agency, they visited Lockheed to discuss the design of such an aircraft. Upon meeting with Johnson they were told that such design already existed and had been rejected by the USAF. Shown the CL-282, the group was impressed and recommended to CIA head Allen Dulles that the agency should fund the aircraft. After consulting with Eisenhower, the project moved forward and Lockheed was issued a $22.5 million contract for the aircraft. Design of the U-2 As the project moved forward, the design was re-designated U-2 with the U standing for the deliberately vague utility. Powered by the Pratt Whitney J57 turbojet engine, the U-2 was designed to achieve high altitude flight with a long range. As a result, the airframe was created to be extremely light. This, along with its glider-like characteristics, makes the U-2 a difficult aircraft to fly and one with a high stall speed relative to its maximum speed. Due these issues, the U-2 is difficult to land and requires chase car with another U-2 pilot to help talk the aircraft down. In effort to save weight, Johnson originally designed the U-2 to take off from a dolly and land on a skid. This approach was later dropped in favor of landing gear in a bicycle configuration with wheels located behind the cockpit and engine. To maintain balance during takeoff, auxiliary wheels known as pogos are installed under each wing. These drop away as the aircraft leaves the runway. Due to the U-2s operational altitude, pilots wear the equivalent of a spacesuit to maintain proper oxygen and pressure levels. Early U-2s carried a variety of sensors in the nose as well as cameras in a bay aft of the cockpit. U-2: Operation History The U-2 first flew on August 1, 1955 with Lockheed test pilot Tony LeVier at the controls. Testing continued and by spring 1956 the aircraft was ready for service. Reserving authorization for overflights of the Soviet Union, Eisenhower worked to reach an agreement with Nikita Khrushchev regarding aerial inspections. When this failed, he authorized the first U-2 missions that summer. Largely flying from Adana Air Base (renamed Incirlik AB on 28 February 1958) in Turkey, U-2s flown by CIA pilots entered Soviet airspace and collected invaluable intelligence. Though Soviet radar was able to track the overflights, neither their interceptors nor missiles could reach the U-2 at 70,000 ft. The success of the U-2 led the CIA and US military to press the White House for additional missions. Though Khrushchev protested the flights, he was unable to prove that the aircraft were American. Proceeding in complete secrecy, flights continued from Incirlik and forward bases in Pakistan for the next four years. On May 1, 1960, the U-2 was thrust into the public spotlight when one flown by Francis Gary Powers was shot down over Sverdlovsk by a surface-to-air missile. Captured, Powers became the center of the resulting U-2 Incident which embarrassed Eisenhower and effectively ended a summit meeting in Paris. The incident led to an acceleration of spy satellite technology. Remaining a key strategic asset, U-2 overflights of Cuba in 1962 provided the photographic evidence that precipitated the Cuban Missile Crisis. During the crisis, a U-2 flown by Major Rudolf Anderson, Jr. was shot down by Cuban air defenses. As surface-to-air missile technology improved, efforts were made to improve the aircraft and reduce its radar cross-section. This proved unsuccessful and work began on a new aircraft for conducting overflights of the Soviet Union. In the early 1960s, engineers also worked to develop aircraft carrier-capable variants (U-2G) to extend its range and flexibility. During the Vietnam War, U-2s were used for high-altitude reconnaissance missions over North Vietnam and flew from bases in South Vietnam and Thailand. In 1967, the aircraft was dramatically improved with the introduction of the U-2R. Approximately 40% larger than the original, the U-2R featured underwing pods and an improved range. This was joined in 1981 by a tactical reconnaissance version designated TR-1A. The introduction of this model re-started production of the aircraft to meet the USAFs needs. In the early 1990s, the U-2R fleet was upgraded to the U-2S standard which included improved engines. The U-2 has also seen service in a non-military role with NASA as the ER-2 research aircraft. Despite its advanced age, the U-2 remains in service due to its ability to perform direct flights to reconnaissance targets on short notice. Though there were efforts to retire the aircraft in 2006, it avoided this fate due to the lack of an aircraft with similar capabilities. In 2009, the USAF announced that it intended to retain the U-2 through 2014 while working to develop the unmanned RQ-4 Global Hawk as a replacement. Lockheed U-2S General Specifications Length:  63 ft.Wingspan:  103 ft.Height:  16 ft.Wing Area:  1,000 sq. ft.Empty Weight:  14,300 lbs.Loaded Weight:  40,000 lbs.Crew:  1 Lockheed U-2S Performance Specifications Power Plant:  1 Ãâ€" General Electric F118-101 turbofanRange:  6,405 milesMax Speed:  500 mphCeiling:  70,000 ft. Selected Sources FAS: U-2The CIA the U-2 Program: 1954-1974

Major Literary Publications of the Harlem Renaissance

Major Literary Publications of the Harlem Renaissance The Harlem Renaissance is a period in American History marked by an explosion of expression by African-American and Caribbean writers, visual artists and musicians. Established and supported by organizations such as the  National Association for the Advancement of Colored People (NAACP) and the National Urban League (NUL), Harlem Renaissance artists explored themes such as legacy, racism, oppression, alienation, rage, hope and pride through the creation of novels, essays, plays, and poetry. In its 20-year spanfrom 1917 to 1937Harlem Renaissance writers created an authentic voice for African-Americans that showed their humanity and desire for equality in United States society. 1917 Asa Philip Randolph and Chandler Owen co-found the political and literary magazine, The Messenger. 1919 Writer and educator Jessie Redmon Fauset  becomes the literary editor of the NAACPs publication, The Crisis. 1922 Claude McKay publishes his first volume of poetry, Harlem Shadows. The collection is considered the first major text of the Harlem Renaissance.James Weldon Johnsons anthology, Book of American Negro Poetry, is published.​ 1923 Jean Toomers Cane is published.The NUL establishes the journal, Opportunity. Charles S. Johnson serves as the journals editor. 1924 As editor of Opportunity, Johnson hosts a dinner at the Civic Club in New York City. This dinner is considered the official launching of the Harlem Renaissance. 1925 The literary magazine, Survey Graphic, publishes a special issue, Harlem: Mecca of the New Negro. The issue is edited by Alain Locke.Color, Countee Cullens first collection of poetry is published. 1926 Locke edits the anthology, The New Negro. The collection is an expanded version of Survey Graphics, Harlem issue.Langston Hughes publishes his first book of poetry, The Weary Blues.The short-lived literary and artistic magazine, Fire!! is published. Hughes, Wallace Thurman, Zora Neale Hurston, Aaron Douglas and Richard Bruce Nugent are founding editors of the magazine.White writer Carl Van Vechten publishes Nigger Heaven. 1927 James Weldon Johnsons collection of poems, Gods Trombones, inspired by sermons of African-American preachers is published. 1928 McKay publishes his first novel, Home to Harlem. The text becomes the first bestselling novel by an African-American author. 1929 Thurman publishes his first novel, The Blacker the Berry. 1930 Hughes novel, Not Without Laughter, is published.Journalist George Schuyler publishes the satirical novel, Black No More. 1932   Sterling Browns  collection of poetry, Southern Road, is published. 1933 Public Works Administration (PWA) and Works Progress Administration (WPA) are established. Both agencies provide jobs to many African-American artists, such as Hurston. 1937 Hurstons second novel, Their Eyes Were Watching God, is published. The novel is considered the last novel of the Harlem Renaissance.

Bariers to the enterpreneurship in Russia Coursework - 1

Bariers to the enterpreneurship in Russia - Coursework Example Petersburg School of Management’s â€Å"Global Entrepreneurship Monitor Russia 2011† and The World Bank’s â€Å"Doing Business: Profile of the Russian Federation†. By way of analyzing the key contributions of these two works as well as drawing inference on the data therein presented, the author will seek to relate to the reader some of the salient challenges that currently face those interesting in performing business within the Russian Federation. One of the primary concerns that MNCs consider when seeking out a prospective nation to develop their company within is the overall stability of the regime. As such, the Russian Federation itself has presented the West with a fairly stable and nominally democratic regime since the collapse of the Soviet Union. However, even though the regime has experienced smooth transitions of power and regularly scheduled elections, the paperwork associated with many of the forms of business development and start up continue to represent Soviet-era difficulties. Rather than having a clear and well defined process in which would-be investors can rapidly navigate the maze of requirements that are extant, the process has devolved into something of a nightmare in which the Russian Federation languishes near the bottom of the list of nations with respect to receiving a building permit, receiving electrical service to ones building, obtaining credit, and paying taxes. With respect to obtaining a building permit, the first step of any firm that has committed itself to expanding within the Russian Federation or elsewhere, the potential investor is greeted by a situation that requires nearly a year to complete. According to The World Bank’s â€Å"Doing Business: Profile of the Russian Federation†, the Russian Federation ranks 178th out of the 185 countries measured with regards to total ease of receiving a building permit. This process is further complicated by the fact that the permit process itself is exorbitantly high and

Article Critique Assignment Example | Topics and Well Written Essays - 1250 words - 2

Article Critique - Assignment Example and research shows that while many adjust appropriately, other face difficulties trying to adjust.The adjustment difficulties in sibling have been associated with poor parent functioning and problem solving technique, weak family cohesion, and family conflicts. The method in which information is obtained has received mixed emotions and critics view that previous research were conducted in an appropriate manner in that sibling adjustment was studied without including the whole family perspective. This is to say that most children who exhibit difficulties in coping, are actually influenced by the family relationship as a whole. For instance, the level of stress parents have because of the coping problem tend to translate to other siblings and they show inability to adjust with their other brothers and sisters. Stress may arise from other sectors of the family life and may not always be related to the challenged child. Having redesigned the technique for research, the present study was aimed at examining the relationship between sibling adjustments, family stress and coping problems. The Resiliency Model of Family Stress, Adjustment and Adaptation was employed to point out various strength-based family factors associated with appropriate adjustment outcomes for those families with stressful situations. The role of family communication was a significant factor in influencing sibling adjustment as well as relating sibling adjustment and factors including socio-demographic, parent characteristics and disability were of a particular interest. The nature of sibling experience within the family was of importance and a central part of the study. It was also aimed at analyzing the relationship between the adjustment of siblings and how they view daily hassles and uplifts especially related to the disabled child. It is good to note that the coping technique that sibling employ in coping with their disabled brother or sister, determines to a large extent their psychological

Dq8m9 Essay Example | Topics and Well Written Essays - 1000 words

Dq8m9 - Essay Example That is why it is important that every organization in business must include the social responsibility as part of their strategy. Norman who is a professor of ethics in Business looks critically at a number of prevalent and quasi-academic outlines for identifying and mitigating beyond-compliance responsibility such as CSR, organizational citizenship, sustainability, shareholder theory and triple bottom-line. His working theory is that beyond compliance responsibilities can be vindicated by using the same ideas and methods we use in vindicating particular guidelines. He also focuses on â€Å"ethical Politicization† and more generally on the nature of answerable behavior in the business-government dealings (Norman 2012 p.75). The idea of corporate social responsibility is exceptionally valuable and hard-worn social benefit. It is a vehicle for endorsing transparency, more tone liability, better communique, honesty, mutually advantageous exchange and functional development. In pr oviding a clear way of critiquing business inside and out of its borders, it is now an essential condition for businesses to have morals and to exercise modern entrepreneurship (Jeremy 2009 p34). It is especially important for the growing global economics, while at the same time it is a delicate issue. However, different researchers are coming up with different views on this topic with one group arguing that business must operate under proper values and the other arguing that social responsibility is a complicated issue and cannot work successfully. According to Moses Pava, Former US secretary Robert Reich is one example of those who oppose the social responsibility advocators (Pava 2008 p.38). He believes that it is a project that can never succeed and campaigning for it is a waste of time and money. Reich points this failure in the raising political power but does not clearly state exactly what his argument is all about. He however, wants this idea dropped and as it is not one tha t could work and the only reason for him is the rise in corporate political power an argument thought as not so convincing according to Pava. Critiques like Reich are therefore, needed to listen keenly to those who have continuously been pushing for more and improved corporate social accountability as they may need to respond to his argument. Understanding the state of business and the processes in it, Reich and other should be convinced that corporate social responsibility is a vital foundation for business morals and for current capitalism. Lack of social corporate responsibility will create an avenue for unnecessary exploitation and great benefits for a few traders and that would not make sense. Reich’s concern in this issue is that rules advocating for the social corporate responsibility are not safe for business as they could cause a lot of harm. He believes that if businesses should prosper, then, they should focus mainly on customer satisfaction and maximization of cor porate profits for stakeholders (Pava 2008p. 50). He says that ethical and social responsibility is individual and can be practiced in those terms instead of setting up policies that direct organizations to operate under ethical social responsibilities, which would frustrate the freedom for organizations to achieve their goals. Pierre, on

Environmental Engineering Essay Example for Free

Environmental Engineering Essay It involves  waste water management  and  air pollution  control, recycling,  waste disposal, radiation protection, industrial hygiene, environmental sustainability, and  public health  issues as well as a knowledge of  environmental engineering law. It is a related study of environmental science. Main task of environmental engineers is to protect public health by protecting (from further degradation), preserving (the present condition of), and enhancing the environment. Some work of Environmental engineers: Conducts hazardous-waste management  studies to evaluate the significance of such hazards, advise on treatment and containment, and develop regulations to prevent mishaps. Design municipal water supply and  industrial wastewater treatment  systems. Address environmental issues such as the effects of  acid rain,  global warming,  ozone depletion, water pollution and air pollution from  automobile exhausts  and  industrial sources. Environmental science  is an interdisciplinary  academic field  that integrates physical and biological sciences, (including but not limited to  Ecology,  Physics,  Chemistry,  Biology,  Soil Science,  Geology,  Atmospheric Science  and  Geography) to the study of the environment, and the solution of environmental problems. Environmental science provides an integrated, quantitative, and interdisciplinary  approach to the study of environmental systems. Environmental science came alive as a substantive, active field of scientific investigation in the 1960s and 1970s driven by the ff. ssues: (a)  Ã‚   the need for a multi-disciplinary approach to analyze complex environmental problems. (b)  Ã‚   the arrival of substantive environmental laws requiring specific environmental protocols of investigation. (c)  Ã‚   the growing public awareness of a need for action in addressing environmental problems. Related areas of study: environmental studies   incorporates more of the social sciences for understanding human relationships, perceptions and policies towards the environment. 2. environmental engineering focuses on design and technology for improving environmental quality. Components of Environmental Science: Ecology  is the study of the interactions between organisms and their environment. Ecologists might investigate the relationship between a population of organisms and some physical characteristic of their environment, such as concentration of a chemical; or they might investigate the interaction between a two populations of different organisms through some symbiotic or competitive relationship. For example, an interdisciplinary analysis of an ecological system which is being impacted by one or more stressors might include several related environmental science fields. In an estuarine setting where a proposed industrial development could impact certain species by  water  and  air pollution,  biologists  would describe the flora and fauna,  chemists  would analyze the transport of water pollutants to the marsh,  physicists  would calculate  air pollution  emissions and  geologists  would assist in understanding the marsh soils and bay muds. . Atmospheric sciences  focuses on the Earths atmosphere, with an emphasis upon its interrelation to other systems. Atmospheric sciences can include studies of  meteorology,greenhouse gas  phenomena,  atmospheric dispersion modeling  of airborne contaminants,[3][4]  sound propagation phenomena related to  noise pollution, and even  light pollution. Taking the example of the  global warming  phenomena, physicists create  computer models  of atmospheric circulation and infra-red radiation transmission, chemists examine the inventory of atmospheric chemicals and their reactions, biologists analyze the plant and animal contributions to  carbon dioxide  fluxes, and specialists such as  meteorologists  and  oceanographers add additional breadth in understanding the atmospheric dynamics. 3. Environmental chemistry  is the study of chemical alterations in the environment. Principal areas of study include  soil contamination  and  water pollution. The topics of analysis include chemical degradation in the environment, multi-phase transport of chemicals (for example, evaporation of a  solvent  containing lake to yield solvent as an air pollutant), and chemical effects upon biota. As an example study, consider the case of a leaking  solvent  tank which has entered the habitat soil of an  endangered species  of amphibian. As a method to resolve or understand the extent of  soil contamination  and subsurface transport of solvent, a computer model would be implemented. Chemists would then characterize the molecular bonding of the solvent to the specific soil type, and biologists would study the impacts upon soil  arthropods, plants, and ultimately pond-dwelling organisms that are the food of the endangered amphibian. 4. Geosciences  include  environmental geology,  environmental soil science, volcanic phenomena and evolution of the Earths crust. In some classification systems this can also includehydrology, including  oceanography. As an example study of soils  erosion, calculations would be made of  surface runoff  by soil scientists. Fluvial geomorphologists would assist in examining  sediment transport  in overland flow. Physicists would contribute by assessing the changes in light transmission in the receiving waters. Biologists would analyze subsequent impacts to aquatic flora and fauna from increases in water turbidity. Ecology study of the interactions between organisms and their environment. starts as early as 300 BC with the Greek named Theophastus, his interest with the interrelationship between organism and the living environment, become his as the Father of Botany. Environment refers to the sum of all the external forces and conditions acting on an organism or community of organism. oekologie was coined by the german zoologist, Ernst Haeckel, comes from the greek word oikos, meaning home or a place to live in. defines as the relationship of animals both to the organic as well as the inorganic environment,   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   in the mid-1900’s two group of botanist, one from the Europe and America, become interested in the study of plants communities, the Europeans concentrated on the composition, structure and distribution of plant communities, on the other hand the Americans concentrate to the development of plant, eventually they become interested at the animals as well, and gave a greater emphasis on inter-relationship of animals and plants. This become the birth of ecology as the formal field of study. British economist, Thomas Malthus, gave special attention to population in the early 19th century, his the first one o recognized the conflict between expanding population and earths capability to supply it. scope of ecology, organism (eg. Proto-plasma, cell, tissue, organ, organ system), population, community, ecosystem, and biosphere. Organism: Levels of organization of life (inside the organism): Protoplasma – it makes up the living substance of the cell. Cell – basic unit of life Tissue-group of cell performing specific functions Organ- group of tissue carrying a particular functions Organ system – group of organ doing s specific function. Levels of organization of life (inside the organism): Population – group of organism of the same kind or species occupying a particular place at a particular time. Community – a group of populations occupying a given area. Ecosystem    basic unit of ecology, refers to the interaction between the organism and environment. It includes population, communities, habitat (the place where the organism lives) and the environment. eg. forest, grassland, river, etc. ) Biosphere – world of life. It is the portion of the earth where in life on its any form existed. Components of ecosystem: Biotic – they are the living components of ecosystem consisting of plants, animals and bacteria. Abiotic – they are the non living component that consist of substratum, ligh t, rainfall, nutrients, soil, temperature, etc. Biotic Components: Green plants   Ã‚  Ã‚     known as the producers. They capture the energy coming from the sun and together with the CO2 in the air and H2O converts this into food energy. They are called autotrophs (self nourishing), they manufacture their own food through the process of photosynthesis. There are also microscopic green plant called phytoplanktons, they give the green color to the bodies of water such as lake and rivers    Animals Known as the consumers. Obtain other food sources to other plants and animals they are called heterotrophs. Three types of consumers: Herbivores – that eat plants only Carnivores – animals that eat other animals. Omnivores- eat both plants and animals. Bacteria and Fungi They are called decomposers. They eat the dead bodies of plants and animals, where they get their energy and convert it to other nutrients back into the environment. They are popular called the janitor of the nature. Abiotic Components: Soil   the upper layer of the earth’s crust affected by plants and animals serves as the habitat and pool of nutrients for many organism. Humus dark decaying organic substance found in the soil. Physical characteristic of soil: Color The color of the soils is influence by the element present in the soil. Soil color and element presesent: Grey (lacks of iron) Brown red (rich in iron) Texture   the texture of the soil affects the amount of water and nutrients the soil can hold. Texture of the soil: Sandy (composed of coarse particles) Clay (consist of fine particles) Silt (composed of medium size particles. ) Loamy (mixture of clay, sand and silt) Moisture Water content of the soil. It is influence by factors such as: Texture Amount of rainfall Slope of the land Underlying rock type. pH The concentration of hydrogen ions on the soil. The soil which contain a large amount of lime is alkaline and with large amount of granite id acidic. pH value raging from 1-6 is acidic and 8-14 are basic while those with 7 reading is neutral type of soil. Structure Refers to the arrangement of it’s particle which build up larger amount of soil structure is called peds. The peds damage will result to the poor drainage of water to the soil. 2. Water Importance of water in ecosystem: It comprise of a large percentage of the tissues of all living organism. Required by plants to support their non woody tissues. Used by the plants as a vessel of nutrients from the soil. It is absorbed by the plant and release in the environment which produces the cooling effect. Plant adaptation to water: (Based on the tolerance of plant to water. ):   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   *   Hydropytes (Plants that grow in water and waterlogged soils)   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   *   Halophytes (Plants that grow in saline environment. )   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   *   Xerophytes (Plants that grow in dry or arid condition. 3. Temperature Affects the plant and cooled blooded animals by controlling their metabolism. Affect the water loss of the organism. Most organism function at temperature between 0 degree to 50 degree centigrade.. 4. Wind An agent of pollination and seed dispersal. It also affects transpiration in the plants by causing faster evaporation with in their surroundings. Pathways of energy: Energy It is needed by the organism for growth, maintenance and repair and for life. Organism obtain their energy by two ways: Autotrophy (producing their own food) Heterotrophy (eating other organism) Food Chain Consist of the sequence of organism that eat other organism through which energy is transferred. Every food chain starts a producer and end with decomposers. Trophic levels of food chain: First trophic ( producers) Second trophic (herbivores called primary consumers) Third trophic (carnivore that eat hervobores) 4th trophic (carnivores that eat carnivores) In food chain the energy transferred from one trophic level to another is decreasing. Food web Consist of several interlocking food chain. It is a transfer of energy involving several pathways. Nutrients cycle: Classification of Nutrients: Macronutrients – those that are required by organism by large quantities. Ex. Oxygen, carbon, nitrogen and hydrogen Micronutrient – are needed by the organism by smaller amounts. Ex. Sulfur, potassium, iron, and phosphorus. Water Cycles: Evaporation (from bodies of water) Respiration ( from animals) Transpiration (from the trees) Condensation   (accumulation of all the vapors, transpiration and respiration) Precipitation (for rain) Runoff (water run from the higher grounds) Carbon and Oxygen cycle: Carbon is mostly present in the environment by cabon dioxide. Carbon dioxide is present at: It could be found at dead organism. Volcano eruption. Respiration of animals. Oxygen is abundant in plants transpiration, it is release in the air as a waste product and absorbed by animals. Nitrogen Cycles: Nitrogen constitutes 78% of air in the atmosphere. Plants used it as a nitrates, and nitrogen converted it by two process: The action of lightning. Process of action by specialized organism such as legumes. Communities Community Group of different kinds of organism or species living together in a particular place. Worlds Major communities: 1. Dessert Biome Bushes and shrubs for vegetation Sandy, dry and loose type of soil. Less than 10 cm of rain fall in a year. Lizards, snakes, eagles, owls, toads, insects and small

Pablo Picasso :: Essays Papers

Pablo Picasso Picasso was born on October 25, 1881, in Malaga, Spain, son of an artist, Jose Ruiz, and Maria Picasso. Rather than adopt the common name Ruiz, the young Picasso took the rarer name of his mother. An artistic prodigy, Picasso, at the age of 14, completed the one-month qualifying examination of the Academy of Fine Arts in Barcelona in one day. From there he went to the Academy of San Fernando in Madrid, returning in 1900 to Barcelona. The years of 1901 to 1904 were known as the "blue period" because of the blue tonality of Picasso's paintings. During this period, he would spend his days in Paris studying the masterworks at the Louvre and his nights enjoying the company of fellow artists at cabarets. 1905 and 1906 marked a radical change in color and mood for Picasso. He became fascinated with the acrobats, clowns and wandering families of the circus world. He started to paint in subtle pinks and grays, often highlighted with brighter tones. This was known as his "rose period." In 1907, Picasso painted "Les Demoiselles d'Avignon," considered the watershed picture of the twentieth century, and met Georges Braque, the other leading artist of the Cubist movement. Cubism was equally the creation of Picasso and Braque and from 1911 to 1913, the two men were in frequent contact. In 1917, Picasso did the set and costume design for Serge Diaghilev's ballet "Parade." For Picasso the 1920's were years of rich artistic exploration and great productivity. Picasso continued to design theater sets and painted in Cubist modes. From 1929 to 1931, he pioneered wrought iron sculpture with his old friend Julio Gonzalez. In the early 1930's, Picasso did a large quantity of graphic illustrations. In late April of 1937, the world learned the shocking news of the saturation bombing of the civilian target of Guernica, Spain by the Nazi Luftwaffe. Picasso responded with his great anti-war painting, "Guernica." During World War II, Picasso lived in Paris, where he turned his energy to the art of ceramics. From 1947 to 1950, he pursued new methods of lithography.