610 résultats pour "while"
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Primate - biology.
The primate order includes a handful of species that live entirely on meat (carnivores) and also a few that are strict vegetarians (herbivores), but it is composed chieflyof animals that have varied diets (omnivores). The carnivorous primates are the four species of tarsiers, which live in Southeast Asia. Using their long back legs, thesepocket-sized nocturnal hunters leap on their prey, pinning it down with their hands and then killing it with their needle-sharp teeth. Tarsiers primarily eat in...
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Mountain Climbing.
teeth on one side, and a straight, flat, metal blade called an adze on the other. Ice axes have many uses. One of the most common is to help the climber stay balanced on steep slopes. The climber swings the axe with a short, quick movement to lodge the pick in snow or ice, creating a secure anchor. If a climber should slip and beginsliding down a snowfield, a self-arrest can be performed by turning face down on the snow and burying the pick in the snow surface. The climber’s weight over the...
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Mexican War.
men, mostly Mexicans, rode to Nacogdoches to capture the rebellious Fredonians. The small garrison of Fredonians soundly defeated their attackers in the only battle ofthe rebellion. When Mexican troops arrived at Nacogdoches a short time later, the republic had been dissolved and the leader of the colonists had fled to Louisiana. B The Texas Revolution Although the Fredonians were not successful, by the 1830s the population of Mexican Texas included many immigrants from the United States. These...
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Fidel Castro.
result, Castro formed a radical branch of the Ortodoxo Party called the Radical Action Orthodox wing. This organization supported Chibás in the 1948 election. PrioSocarrás won the election, despite Castro’s efforts. After Chibás committed suicide in 1951, Castro believed he should become the leader of the Ortodoxo Party and ran for a seat in the Cuban House of Representatives inthe 1952 election. Before that election could occur, however, General Fulgencio Batista staged a bloodless coup d’etat...
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Molecule - chemistry.
attracted to the negatively charged electrons between them. The electrons belong to the molecule as a whole. However, each hydrogen atom now has a complete outershell of two electrons. The formula H 2 describes a hydrogen molecule, a discrete unit. When a molecule contains just two atoms, such as the hydrogen molecule does, it is called a diatomic molecule. Some atoms can form covalent bonds with more than one other atom and thus create a larger molecule. Atoms form molecules with covalent bo...
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Nicklaus-Watson Match.
until 1977, primarily because golf officials felt that there weren't enough hotel rooms in the area to attract and accommodate the crowds. But officials finally relented,deciding that the majestic course deserved to stage golf's most noble tournament. The sun shone brightly over this scene for the July event. Nicklaus and Watson were both on the leader board after the first two rounds with identical scores of 68-70-138. Their dramatic play began in the third round, on Friday. Nicklaus jumped...
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Cheetah - biology.
animals such as zebras. Unlike most cats, cheetahs hunt during the day, when lions and hyenas that compete with them for prey are less likely to be active. Still,scientists in Tanzania have observed that cheetahs lose 10 to 13 percent of their kills to lions and hyenas. Alerted by the panic of a gazelle herd or by the circling ofvultures, lions and hyenas close in and easily drive the more timid cheetah away from a fresh kill. A cheetah usually stalks prey to within about 10 m (about 33 ft) and...
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Kuwait (country) - country.
Oil revenues have allowed Kuwait to build an extensive educational system, yielding a literacy rate of 84 percent. Public school is free and compulsory from the age of 6to 13, and several private schools also teach this age group. Kuwait University (founded in 1966) is also free and offers programs in a wide range of professional andscientific fields at several campuses. Both the extensive library system at Kuwait University and the collection at Kuwait National Museum (1957) were heavily damage...
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São Paulo (city) - geography.
universities include the State University Paulista Júlio de Mesquita Filho (1976), and the even larger University of São Paulo (1934), which incorporates the city’s famousand influential Faculty of Law. Important private universities are Mackenzie University, originally founded by Presbyterian missionaries from the United States (1870);the Paulista University (1972); the Pontifical Catholic University of São Paulo (1946); and the University São Judas Tadeu (1971). The city is home to the São Pau...
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Scramble for Africa.
additional territorial grabs. The most significant of these rules stated that colonial powers were obligated to notify each other when they claimed African territory.Further, subsequent “effective occupation” of the claimed area was necessary for the claim to remain valid. Through it all, as Europeans negotiated their rights toAfrican territory, not a single African was present. Once the conference was over, it was clear that a European Scramble for African territories was underway. Southern Afr...
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Birding - biology.
swallows, and rock doves nest on buildings in cities, towns, and farms. The chimney swift has abandoned hollow trees for chimneys as a nest site in urban areas.Mallards and Canada geese—once exclusively wild, migratory species—now live year-round in the open spaces found in city parks and golf courses. Nearly all purplemartins, a songbird species that once used the abandoned nests of woodpeckers or the natural cavities of cliffs or dead trees, now live primarily in structures specificallyconstru...
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Bird.
I
INTRODUCTION
Bird, animal with feathers and wings. Birds are the only
B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...
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Bird - biology.
B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...
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Washington, D.
South of the Federal Triangle is the Mall, a narrow park stretching roughly 1.6 km (1 mi) from the Capitol to the Washington Monument. Although the Mall officially ends at14th Street, landscaped greenery extends to the Potomac. The Washington Monument, whose marble shaft dominates the skyline, stands 169 m (555 ft) high near thecenter of this parkland. The interior of the monument is hollow, and visitors may either climb its 898 steps or ride its elevator 150 m (500 ft) for a magnificent view. A...
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From The Sound and the Fury - anthology.
'You'd better slip on your pants and run,' he said. He went out. I got up and moved about, listening to him through the wall. He entered the sitting-room, toward the door. 'Aren't you ready yet?' 'Not yet. Run along. I'll make it.' He went out. The door closed. His feet went down the corridor. Then I could hear the watch again. I quit moving around and went to the window and drew thecurtains aside and watched them running for chapel, the same ones fighting the same heaving coat-s...
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Atificiel
Sustainability 2019,11 , 189 2 of 24Since the 1980s, many research was conducted to minimize the error of prediction through a method dubbed as gradient descent. This method is referred to as a Backpropagation algorithm for the training of the ANNs and it was applied to solve problems in different domains using few hidden layers [ 5,6]. Today, the availability of data has introduced the concept of machine learning as a subcategory to AI. Machine learning implies coding the computers to behave l...
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From Bulfinch's Mythology: Hercules - anthology.
'…amidst the gardens fairOf Hesperus and his daughters three,That sing about the golden tree.' The poets, led by the analogy of the lovely appearance of the western sky at sunset, viewed the west as a region of brightness and glory. Hence they placed in it theIsles of the Blest, the ruddy Isle Erytheia, on which the bright oxen of Geryon were pastured, and the Isle of the Hesperides. The apples are supposed by some to bethe oranges of Spain, of which the Greeks had heard some obscure account...
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Central African Republic - country.
Manufacturing activity in the Central African Republic is very limited. Products include cottonseed, peanut, and sesame oils; textiles; leather goods; tobacco products;soap; flour; bricks; and paint. The output of electricity in 2003 was 106 million kilowatt-hours, 80.19 percent of which was generated in hydroelectric installations. Gemdiamonds account for nearly all the country’s mineral output and two-thirds of its export revenue. Production was 250,000 carats in 2004. Uranium was discovered i...
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Animal - biology.
Vertebrates are customarily divided into cold-blooded and warm-blooded animals, but these labels are not very precise. Biologists normally use the terms ectoderm and endoderm to describe temperature regulation more accurately. An ectoderm is an animal whose temperature is dictated by its surroundings, while an endoderm is one that keeps its body at a constant warm temperature by generating internal heat. Reptiles, amphibians, and fish are ectoderms. Although they do not maintain a constant wa...
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Kiribati - country.
mainly from Japan, the European Union (EU), and Australia. Kiribati’s only major exports are copra (dried coconut meat), cultivated seaweed, and fish. The United States, Australia, and New Zealand are the leading purchasers ofthe country’s exports. Despite the cultivation of crops for local consumption, Kiribati is heavily dependent upon imported foods. Other imports include machinery andequipment, manufactured goods, and imported fossil fuels, which supply most of the country’s energy. Australi...
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Blues
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INTRODUCTION
Listening to the Blues
Blues music comes in a variety of styles and forms, including acoustic blues, electric blues, rock, and jazz.
recording of “How Many More Years” demonstrate this structure: a. How many more years do I got to let you dog me around?a. How many more years do I got to let you dog me around?b. I just as soon be dead, sleeping six feet in the ground. Each lyric line is typically sung over the first half (first two bars) of a four-bar line. After each lyric line (the “call”), an instrumental response is commonly played, alsoconsisting of approximately two bars. The tension created by the two-bar call-and-res...
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Uranus (planet) - astronomy.
V COMPOSITION AND STRUCTURE A Interior of Uranus Uranus contains mostly rock and water, with hydrogen and helium (and trace amounts of methane) in its dense atmosphere. Astronomers believe that Uranus, likeNeptune, formed from the same material—principally frozen water and rock—that composes most of the planet’s moons. As the planet grew, pressures andtemperatures in the planet’s interior increased, heating the planet’s frozen water into a hot liquid. Uranus probably has a relatively small roc...
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Comparative Anatomy.
In comparing two species, anatomists have to be careful to differentiate between homologous structures, which are ones that have evolved from a shared ancestor, andanalogous structures, which have developed from different origins. Homologous structures are built on the same underlying plan. A human arm, a bat’s wing, and awhale’s flipper look quite different from the outside, but the bones inside reveal that these limbs all have the same basic structure. Analogous structures, by contrast,often l...
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Fruit - biology.
from a flower with several pistils. The ovary may have a single compartment, or carpel, which houses the ovule or ovules. Or the ovary may consist of two or morecarpels, each of which may contain one or more ovules. A drupe develops from an ovary with a single carpel and is characterized by an edible exocarp and mesocarp and an inedible, hard endocarp, or pit that encloses asingle seed. Cherries, peaches, apricots, and plums are examples of drupes. Almonds also are classified as drupes, but in a...
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Track and Field.
VI RUNNING EVENTS Running events are competitions that test athletes’ quickness, speed, and endurance. Athletes win running races by completing the distance or course in the leastamount of time. A Sprints The shortest running events, called sprints or dashes, are the premier events at a track-and-field meet. The outdoor sprints consist of the 100-meter, 200-meter, and400-meter events. Sprints contested at indoor meets include the 50-meter, 60-meter, 200-meter, and 400-meter events. Past champ...
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Cold War.
With this, all the countries of Eastern Europe were under Communist control, and the creation of the Soviet bloc was complete. The events of 1948 contributed to agrowing conviction among political leaders in both the United States and the USSR that the opposing power posed a broad and fundamental threat to their nation’sinterests. The Berlin blockade and the spread of Communism in Europe led to negotiations between Western Europe, Canada, and the United States that resulted in the NorthAtlantic...
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Cold War .
With this, all the countries of Eastern Europe were under Communist control, and the creation of the Soviet bloc was complete. The events of 1948 contributed to agrowing conviction among political leaders in both the United States and the USSR that the opposing power posed a broad and fundamental threat to their nation’sinterests. The Berlin blockade and the spread of Communism in Europe led to negotiations between Western Europe, Canada, and the United States that resulted in the NorthAtlantic...
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Cold War - U.
With this, all the countries of Eastern Europe were under Communist control, and the creation of the Soviet bloc was complete. The events of 1948 contributed to agrowing conviction among political leaders in both the United States and the USSR that the opposing power posed a broad and fundamental threat to their nation’sinterests. The Berlin blockade and the spread of Communism in Europe led to negotiations between Western Europe, Canada, and the United States that resulted in the NorthAtlantic...
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Roman Empire .
A Government Augustus did not derive his power from any single office, but from the authority of his name and his victory. In fact, he carefully pieced together a patchwork of powersthat allowed him to be an absolute ruler and yet avoid the hatred Caesar aroused as dictator. In Latin, the name Augustus implies both political authority and religiousrespect. The Romans had for some time called Octavian imperator , a title once awarded to victorious generals that soon became associated with the r...
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Roman Empire - History.
A Government Augustus did not derive his power from any single office, but from the authority of his name and his victory. In fact, he carefully pieced together a patchwork of powersthat allowed him to be an absolute ruler and yet avoid the hatred Caesar aroused as dictator. In Latin, the name Augustus implies both political authority and religiousrespect. The Romans had for some time called Octavian imperator , a title once awarded to victorious generals that soon became associated with the r...
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Azerbaijan - country.
second most important industrial center after Baku. A Ethnic Groups Azerbaijan, including the autonomous exclave of Naxçivan, is populated mostly by ethnic Azerbaijanis, who are also known as Azeris. The ethnic composition of thecountry changed due to a civil war between the government of Azerbaijan and Armenian secessionists in the Nagorno-Karabakh enclave. Beginning in 1988, when thepeople of Nagorno-Karabakh unilaterally decided to secede from Azerbaijan, nearly the entire Azerbaijani popula...
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Canadian Literature
I
INTRODUCTION
Canadian Literature, literature of the peoples of Canada.
William Henry DrummondPoet William Henry Drummond described the lives of French Canadian farmers, loggers, and rural workers in verse thatreflected their mix of French and English speech. He gained recognition in the late 19th and early 20th centuries.Library of Congress In the early 19th century, most Canadian poetry imitated earlier British poetry. Poets Oliver Goldsmith (grandnephew of the Anglo-Irish writer of the same name),Charles Sangster, Charles Mair, and Levi Adams exemplified literary...
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Star (astronomy) - astronomy.
absorbing the missing colors of light. For example, the set of dark lines made by hydrogen includes a dark red line, the set of dark lines made by sodium includes a pairof dark yellow lines, and the set of dark lines made by iron includes lines of nearly every color. Each element in the gaseous outer layer of a star produces its ownparticular pattern of dark spectrum lines, depending on the temperature and pressure of the gas. Astronomers have observed spectrum lines, or spectra, for hundredsof...
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Acquired Immunodeficiency Syndrome.
child transmission is particularly prevalent in Africa. D Misperceptions About HIV Transmission The routes of HIV transmission are well documented by scientists, but health officials continually grapple with people’s unfounded fears concerning the potential for HIVtransmission by other means. HIV differs from other infectious viruses in that it dies quickly if exposed to the environment. No evidence has linked HIV transmission tocasual contact with an infected person, such as a handshake, huggi...
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New Jersey - geography.
C Soils Broadly defined, all of New Jersey’s soils are podzolic soils; that is, they are acidic and contain fairly high amounts of iron oxides. The soils in northern New Jersey areirregular in quality and contain rock fragments and small stones deposited by the continental glaciers of the last Ice Age. The soils of the inner coastal plain, unaffectedby glaciation, are the richest in the state, while those of the outer coastal plain are generally infertile. The newer soil classification system d...
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New Jersey - USA History.
C Soils Broadly defined, all of New Jersey’s soils are podzolic soils; that is, they are acidic and contain fairly high amounts of iron oxides. The soils in northern New Jersey areirregular in quality and contain rock fragments and small stones deposited by the continental glaciers of the last Ice Age. The soils of the inner coastal plain, unaffectedby glaciation, are the richest in the state, while those of the outer coastal plain are generally infertile. The newer soil classification system d...
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El Salvador - country.
III PEOPLE The Spanish subjugated the native population of El Salvador in the 16th century. Few Spanish women came to the country, however, so many Spanish men took NativeAmerican women as their mates. Today nearly 90 percent of the population is mestizo , of mixed European and Native American descent. People of purely Native American descent represent about 5 to 10 percent of the population, while people of European descent represent only about 1 percent. El Salvador’s population, 5.2 millio...
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Vietnam - country.
E Natural Resources Vietnam’s most valuable natural resource is its land, particularly the fertile, alluvial soils in the Red and Mekong deltas. Some 29 percent of the land is currently beingcultivated. Vietnam has some valuable mineral resources, including gold, iron, tin, zinc, phosphate, chromite, apatite, and anthracite coal. Most deposits are located in the northernpart of the country. Few attempts were made to extract these minerals until the French takeover of Vietnam at the end of the 1...
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Québec - Geography.
facilities. Tributaries south of the St. Lawrence include the Richelieu, the Saint-François, and the Chaudière rivers, which are only a few hundred kilometers long. TheRimouski and Matane rivers, also south of the St. Lawrence, are popular areas for recreation and salmon fishing. In the Canadian Shield, the longest rivers are theRupert, Eastmain, Grande Baleine, and La Grand-Rivière, which is the site of a huge hydroelectric complex. C Coastlines Québec has two systems of saltwater coastline. O...
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Québec - Canadian History.
facilities. Tributaries south of the St. Lawrence include the Richelieu, the Saint-François, and the Chaudière rivers, which are only a few hundred kilometers long. TheRimouski and Matane rivers, also south of the St. Lawrence, are popular areas for recreation and salmon fishing. In the Canadian Shield, the longest rivers are theRupert, Eastmain, Grande Baleine, and La Grand-Rivière, which is the site of a huge hydroelectric complex. C Coastlines Québec has two systems of saltwater coastline. O...
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Israel (country) - country.
harbor in the northern part of the country, and Ashdod, an artificial deepwater port to the south, serve as the main seaports on the Mediterranean. The port of Elat onthe Gulf of Aqaba provides Israel’s only access to the Red Sea, making it extremely important to the country’s shipping interests. D Natural Resources Although much of Israel’s desert regions contain poor soils, the northern Negev, the coastal plains, and the interior valleys provide patches of productive soils. Anestimated 18 per...
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American Civil War.
free state to keep the balance in the Senate. It also provided that slavery would be excluded from the still unorganized part of the Louisiana Territory. A line was drawnfrom Missouri’s southern boundary, at the latitude of 36°30’, and slavery would not be allowed in the territory north of that line,with the exception of Missouri. B Compromise of 1850 Agitation against slavery continued in the North. The South reacted by defending it ever more strongly. The Mexican War, by which the United Stat...
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American Civil War - U.
free state to keep the balance in the Senate. It also provided that slavery would be excluded from the still unorganized part of the Louisiana Territory. A line was drawnfrom Missouri’s southern boundary, at the latitude of 36°30’, and slavery would not be allowed in the territory north of that line,with the exception of Missouri. B Compromise of 1850 Agitation against slavery continued in the North. The South reacted by defending it ever more strongly. The Mexican War, by which the United Stat...
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Japan - country.
island’s fertile soils support agriculture and provide the vast majority of Japan’s pasturelands. In addition, Hokkaidō contains coal deposits, and the cold currents off itsshores supply cold-water fish. Winters are long and harsh, so most of Hokkaid ō is lightly settled, housing about 5 percent of Japan’s population on approximately 20 percent of its land area. However,its snowy winters and unspoiled natural beauty attract many skiers and tourists. Hokkaid ō is thought of as Japan’s northern fr...
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World War I .
and troops to Europe from the United States and other overseas sources. In 1914 Britain implemented a sea blockade of Germany to prevent the delivery of importssuch as food and war materials. The same year, Germany began using submarines to disrupt Allied seaborne traffic and prevent supplies from reaching Britain. In 1915Germany instituted a submarine blockade around Britain. From February 1915 to September 1915 and again in 1917, Germany used unrestricted submarine warfare,sinking ships withou...
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Cancer (medicine).
unable to repair the DNA damage, p53 instructs the cell to undergo programmed cell death, or apoptosis , putting a stop to runaway cell division before it starts. Programmed cell death is a normal part of cell life and is tightly controlled by many genes, primarily p53. In a cancerous cell, one or more mutations prevent these genes from doing their jobs. When mutated, p53 allows a cell to continue to divide, even with damaged DNA.This can lead to additional mutations in proto-oncogenes or tumor...
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Saudi Arabia - country.
C Natural Resources Some of the world’s largest oil and natural gas fields lie beneath Saudi Arabia and its offshore waters, representing the country’s most economically important naturalresource. In 2007 Saudi Arabia’s oil reserves were estimated at 264 billion barrels. Before the discovery and exploitation of these reserves in the mid-20th century,Saudi Arabia was one of the poorest countries in the world. Its relatively small population subsisted in a harsh environment with little agricultur...
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Ukraine - country.
a major hazard, especially to Ukraine’s water supply. The Chernobyl’ complex was finally shut down completely in December 2000, with the financial assistance ofWestern nations. The funds were to pay for the completion of two other nuclear power plants that would produce enough power to make up for the loss of the powersupply from the Chernobyl’ plant. III PEOPLE OF UKRAINE The population of Ukraine was estimated in 2008 at 45,994,287, giving the country a population density of 76 persons per s...
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Confucian philosophy, Korean
neglected by more traditional Confucianism. Read with new eyes, an entirely new level of meaning was uncovered in the ancient texts: they discovered a Confucian foundation for the meditative cultivation of consciousness that had been a particular strength of the Buddhists, and to frame it and provide an account of sagehood equal to Buddhist talk of enlightenment, they found a complete metaphysical system, a Confucian version of the kind of thinking that had been elaborated mainly under Daoist au...
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Montana - geography.
(191 sq mi), is Montana’s largest lake, and the largest natural freshwater lake in the contiguous states west of the Mississippi River. C Climate Climatic regions in Montana coincide roughly with the two major physiographic regions. In western Montana, as compared with the eastern plains area, winters tend tobe milder while summers are cooler. Precipitation is more evenly distributed throughout the year in the west, and it is cloudier and somewhat more humid in all seasons.In addition, the grow...