1588 résultats pour "year"

• Lithuania - country.

  pollution. III PEOPLE Ethnic Lithuanians constitute about 80 percent of the country’s population. The proportion of Lithuanians increased slightly in the first years after the dissolution of theSoviet Union—many Lithuanians returned to their homeland from that country and abroad while some Russians, Ukrainians, and Belarusians left the country. Russiansand Poles constitute the country’s largest minority groups, each accounting for roughly 7 percent of the population. Jews were the largest mino...

• Thailand - country.

  E Natural Resources Thailand possesses a range of mineral resources. Tin is mined in the peninsula. Important gemstones, such as sapphires, are found in the southeast, and coal reserves,particularly lignite, are in the north. Fish are abundant in rivers and coastal waters. In addition to being consumed domestically, fish are also exported. F Climate Thailand experiences a typical monsoon climate. Winds blow from the northeast during the winter months of October to March or April (known as the...

• John Tyler.

  A “His Accidency” Tyler was summoned to Washington, D.C., as acting president. The Constitution seemed unclear as to whether Tyler should now merely assume the duties of thepresident until new elections were held, or whether he should in fact assume the office of president. Tyler chose the latter view and on April 6 had himself sworn in aspresident. This procedure, later taken for granted, exposed Tyler to much censure and abuse. Throughout his term, Whigs and Democrats alike denounced his acti...

• John Tyler

  A “His Accidency” Tyler was summoned to Washington, D.C., as acting president. The Constitution seemed unclear as to whether Tyler should now merely assume the duties of thepresident until new elections were held, or whether he should in fact assume the office of president. Tyler chose the latter view and on April 6 had himself sworn in aspresident. This procedure, later taken for granted, exposed Tyler to much censure and abuse. Throughout his term, Whigs and Democrats alike denounced his acti...

• Horse - biology.

  Horses reach sexual maturity at about one and a half years. The estrous cycle in the mare—a mature female horse—typically lasts 21 days. During the first five days ofthe cycle, the mare is usually receptive to mating. The estrous cycle stops during winter and resumes in the spring, which is the start of the breeding season. Astallion—a mature male horse—approaching a mare in estrus engages in various courtship rituals. These include uttering nickering sounds and sniffing and licking themare’s ge...

• Medical Ethics.

  medical profession. In recent years, however, the field of medical ethics has struggled to keep pace with the many complex issues raised by new technologies for creating and sustaininglife. Artificial-respiration devices, kidney dialysis, and other machines can keep patients alive who previously would have succumbed to their illnesses or injuries.Advances in organ transplantation have brought new hope to those afflicted with diseased organs. New techniques have enabled prospective parents to con...

• Immigration.

  1655, only to lose all of their North American colonies to the British in 1664. These early colonies were often quite cosmopolitan, drawing settlers from many nations.When the English seized New Amsterdam, the city was home to perhaps 1500 residents, including Walloons, Huguenots, Swedes, Dutchmen, and African Americans. C The French and Spanish The French and Spanish also established colonies in North America. The Spanish established the oldest permanent European settlement in Saint Augustine,...

• Immigration - U.

  1655, only to lose all of their North American colonies to the British in 1664. These early colonies were often quite cosmopolitan, drawing settlers from many nations.When the English seized New Amsterdam, the city was home to perhaps 1500 residents, including Walloons, Huguenots, Swedes, Dutchmen, and African Americans. C The French and Spanish The French and Spanish also established colonies in North America. The Spanish established the oldest permanent European settlement in Saint Augustine,...

• Mars (planet) - astronomy.

  The Martian core is probably much like Earth’s, consisting mostly of iron, with a small amount of nickel. If other light elements, particularly sulfur, exist there as well, thecore may be larger than presently thought. From studying Earth’s magnetic field and core, scientists theorize that the motions of the liquid rock in Earth’s core generateits magnetic field. Mars does not have a significant magnetic field, so scientists believe that Mars’s core is probably solid. However, spacecraft data in...

• Saskatchewan (province) - Geography.

  The length of the frost-free season varies within the province. In the southwest, particularly in the valley lands along the South Saskatchewan River, the frost-freeperiod ranges from 150 to 160 days. Regina enjoys about 123 frost-free days, and Saskatoon has about 111. The far north has only from 85 to 95 frost-free days. One important characteristic of Saskatchewan’s climate is the great variability in temperature and precipitation from year to year, which is often critical for agriculture.The...

• Saskatchewan (province) - Canadian History.

  The length of the frost-free season varies within the province. In the southwest, particularly in the valley lands along the South Saskatchewan River, the frost-freeperiod ranges from 150 to 160 days. Regina enjoys about 123 frost-free days, and Saskatoon has about 111. The far north has only from 85 to 95 frost-free days. One important characteristic of Saskatchewan’s climate is the great variability in temperature and precipitation from year to year, which is often critical for agriculture.The...

• Colorado - geography.

  Although the rivers of Colorado are navigable only by small boats, they are important as a source of irrigation water for use in Colorado and adjoining states. However,the water level of the rivers fluctuates seasonally and from year to year. The level is generally low in winter and high in spring and summer, during the runoff of meltedsnow from the mountains. Colorado has no large lakes of natural origin, but there are numerous small lakes in the mountains. The largest bodies of water in Colora...

• Colorado - USA History.

  Although the rivers of Colorado are navigable only by small boats, they are important as a source of irrigation water for use in Colorado and adjoining states. However,the water level of the rivers fluctuates seasonally and from year to year. The level is generally low in winter and high in spring and summer, during the runoff of meltedsnow from the mountains. Colorado has no large lakes of natural origin, but there are numerous small lakes in the mountains. The largest bodies of water in Colora...

• Wolfgang Amadeus Mozart I INTRODUCTION Wolfgang Amadeus Mozart Wolfgang Amadeus Mozart, an 18th-century Austrian classical composer and one of the most famous musicians of all time, came from a family of musicians that included his father and sister.

  The opera, Mitridati, rè di Ponto (Mithridates, King of Pontus), was produced in 1770 in Milan under Mozart’s direction with success. Also that year the pope made Mozart a knight of the Order of the Golden Spur. A Salzburg and Germany From 1775 to 1780 Mozart was based mainly in Salzburg working for the archbishop Hieronymous von Colloredo. Although dissatisfied with the low pay and limitedopportunities his employment offered, Mozart composed many works during this period, including his first...

• British Empire .

  B1 The Seven Years’ War During the Seven Years’ War in Europe (1756-1763), Britain made large imperial gains at the expense of France. The North American segment of the Seven Years’ Warwas known as the French and Indian War. It was launched by the British against French possessions in North America in 1754, and in 1758 the British captured theFrench fortress of Louisbourg, which gave them access to French territory in the St. Lawrence Valley. In the following year Québec was captured, marking t...

• Psychotherapy.

  Other managed-care companies pay therapists a set fee to meet with a client for up to a specified maximum number of sessions depending on the nature of theproblem, free of interference from case reviewers. For example, a managed-care firm may pay a therapist $200 to hold up to eight sessions with a person. If the clientuses all eight sessions, the therapist normally loses money. But if treatment stops after two or three sessions, the therapist makes a profit. This relatively new system iscontrov...

• Laos - country.

  by the year 2025. About one-quarter of Laos’s people live in mountainous regions. The rest live in upland valleys or on the flood plains of the Mekong and its tributaries.Just over three-quarters of the population live in rural areas, although the proportion of people living in urban areas is steadily increasing. Vientiane is the capital and largest city of Laos. Louangphrabang, the former royal capital, is an increasingly popular tourist destination. Other major cities are theregional capitals...

• Isaac NewtonIINTRODUCTIONIsaac Newton (1642-1727), English physicist, mathematician, and natural philosopher, considered one of the most important scientists of all time.

  B Calculus (Newton’s “Fluxional Method”) In 1669 Newton gave his Trinity mathematics professor Isaac Barrow an important manuscript, which is generally known by its shortened Latin title, De Analysi . This work contained many of Newton’s conclusions about calculus (what Newton called his “fluxional method”). Although the paper was not immediately published, Barrowmade its results known to several of the leading mathematicians of Britain and Europe. This paper established Newton as one of the...

• Isaac Newton.

  B Calculus (Newton’s “Fluxional Method”) In 1669 Newton gave his Trinity mathematics professor Isaac Barrow an important manuscript, which is generally known by its shortened Latin title, De Analysi . This work contained many of Newton’s conclusions about calculus (what Newton called his “fluxional method”). Although the paper was not immediately published, Barrowmade its results known to several of the leading mathematicians of Britain and Europe. This paper established Newton as one of the t...

• Afghanistan - country.

  D Climate Most of Afghanistan has a subarctic mountain climate with dry and cold winters, except for the lowlands, which have arid and semiarid climates. In the mountains and afew of the valleys bordering Pakistan, a fringe effect of the Indian monsoon, coming usually from the southeast, brings moist maritime tropical air in summer.Afghanistan has clearly defined seasons: Summers are hot and winters can be bitterly cold. Summer temperatures as high as 49°C (120°F) have been recorded in thenorth...

• Islam.

  commanded to face the Kaaba, an ancient shrine in the city of Mecca. The Qur’an also refers to the recitation of parts of the Qur’an as a form of prayer. However, evenwith its numerous references, the Qur’an alone does not give exact instructions for this central ritual of prayer. The most detailed descriptions of the rituals for prayer derive from the example set by the prophet Muhammad and are preserved in later Islamic traditions. Somedetails of these rituals vary, however all Muslims agree t...

• Roman Mythology.

  Her temple on the Aventine Hill in Rome was a center for organizations of skilled craftspeople. According to tradition, in 509 BC the dynasty of Etruscan kings ended and the Roman Republic was founded. The republic was ruled by two chief magistrates, called consuls, who were elected by the people to one-year terms. During the time of the republic, the Capitoline temple became the most important public shrine of theRoman people and the focus of public worship. Each January, the new consuls offer...

• Lester Pearson.

  a vacant seat. The by-election followed a major Liberal victory in September, and as a Liberal Party candidate, Pearson won by a comfortable margin in Algoma East,Ontario. He was reelected to the House of Commons in elections between 1949 and 1965. He was immediately made secretary of state for external affairs in the cabinetof Prime Minister Louis St. Laurent. In this post, Pearson set a new standard of frank exchange and cooperation that brought him respect and esteem. However, manyCanadians w...

• Lester Pearson - Canadian History.

  a vacant seat. The by-election followed a major Liberal victory in September, and as a Liberal Party candidate, Pearson won by a comfortable margin in Algoma East,Ontario. He was reelected to the House of Commons in elections between 1949 and 1965. He was immediately made secretary of state for external affairs in the cabinetof Prime Minister Louis St. Laurent. In this post, Pearson set a new standard of frank exchange and cooperation that brought him respect and esteem. However, manyCanadians w...

• Victoria (queen) I INTRODUCTION Victoria (queen) (1819-1901), queen of the United Kingdom of Great Britain and Ireland (1837-1901) and empress of India (1876-1901).

  Queen Victoria never truly recovered from Albert’s death in December 1861 at the age of 42. For almost a decade she remained in strict mourning. She rarely set footin London, and she avoided most public occasions, including the state opening of Parliament. She made an exception, however, for the unveiling of statues dedicated toPrince Albert and, after a few years, for attendance at army reviews. Behind the scenes, she continued to correspond with and talk to her ministers, and she took comfort...

• Victoria (queen).

  Queen Victoria never truly recovered from Albert’s death in December 1861 at the age of 42. For almost a decade she remained in strict mourning. She rarely set footin London, and she avoided most public occasions, including the state opening of Parliament. She made an exception, however, for the unveiling of statues dedicated toPrince Albert and, after a few years, for attendance at army reviews. Behind the scenes, she continued to correspond with and talk to her ministers, and she took comfort...

• Panama Canal - Geography.

  The size of ships using the Panama Canal has steadily increased. About 27 percent of the vessels that use the canal are built to the maximum dimensions that can passthrough it (a category called “Panamax”). This has prompted further widening of Gaillard Cut, so that the larger Panamax vessels may transit safely. However, some ofthe world’s commercial and military ships are too large for the canal. Since the 1940s, new U.S. battleships and aircraft carriers have been built exceeding the canal’sdi...

• Miami (Florida) - geography.

  VI EDUCATIONAL AND CULTURAL INSTITUTIONS Colleges and universities in the area include the University of Miami, Florida International University, Barry University, St. Thomas University, and Florida MemorialCollege. Miami-Dade Community College, one of the nation’s largest two-year colleges, has six campuses in the region. Leading museums include the Historical Museumof Southern Florida, the Miami Museum of Science, the Miami Art Museum, the Lowe Art Museum on the campus of the University of M...

• Church of Jesus Christ of Latter-day Saints.

  yearly visited a book written in a hieroglyphic script on golden plates buried in a nearby hill; the book’s location, he said, had been disclosed to him by an angel. In 1830he completed the translation of these plates, “by the gift and power of God,” and published the Book of Mormon, which he believed to be a religious record of theancient inhabitants of North America. On April 6, 1830, he organized the Church of Christ, soon known by its present title, the Church of Jesus Christ of Latter-daySa...

• Excerpt from Dombey and Son - anthology.

  light. Rivers and seas were formed to float their ships; rainbows gave them promise of fair weather; winds blew for or against their enterprises; stars and planetscircled in their orbits, to preserve inviolate a system of which they were the centre. Common abbreviations took new meanings in his eyes, and had sole reference tothem. A.D. had no concern with anno Domini, but stood for anno Dombei—and Son. He had risen, as his father had before him, in the course of life and death, from Son to D...

• W. E. B. Du Bois - USA History.

  VI PEACE ACTIVIST After World War II (1939-1945), Du Bois became increasingly involved in promoting world peace and nuclear disarmament. In 1950 he became chairman of the PeaceInformation Center in New York City, a group whose stated objective was to gather signatures in the United States for a global petition to ban the use of nuclearweapons. In July of that year, after the organization had gathered more than one million U.S. signatures, the Peace Center was labeled a Communist-front organiza...

• Cuban Revolution.

  Confederation of Labor, threw its support behind Batista. In the same month, the U.S. government cut off weapons sales to Batista’s government. U.S. envoys andpolitical moderates in Cuba tried to convince Batista to leave power peacefully, but Batista refused. Meanwhile, revolutionaries from Castro’s movement and from otherorganizations escalated violent resistance. During the second half of 1958, guerrillas seized ground in the countryside from the army. In the cities, several of Batista’sleadi...

• Koala - biology.

  V REPRODUCTION Female koalas become sexually mature around 18 to 24 months of age. They can produce one offspring a year until they reach about 13 years of age. Males begin toproduce sperm around age 2 and, in the absence of older, stronger males, they may breed at that young age. More often, however, a male must grow big enough tocompete with other males for females, and mating generally begins for males at about 4 years of age. The breeding season for koalas is from October to May, during the...

• Augustine

  do what one knows one ought not to be doing, mark him off from ethicists of the classical Greek period. YetAugustine also preserves in his own thinking important strands of ancient Greek thought. Thus, for example, hisdevelopment of the doctrine of the Christian virtues includes an echo of Plato's idea of the unity of the virtues. Hisinsistence that 'ought' does not, in any straightforward way, imply 'can', distinguishes him, not only from hiscontemporary Pelagius, whom he helped brand...

• Duck - biology.

  from water. When ducks feed they push their tongue against the top of their mouth to squeeze water through the lamellae, leaving the food behind. Mergansers arefish-eating ducks with slender bills that are notched on the edges like the blade of a saw. These saw-toothed beaks help the ducks catch and hold their slippery prey. VI COURTSHIP AND REPRODUCTION Ducks form pairs long enough to mate, but most species find new mates each year. In a few species, including buffleheads and whistling ducks,...

• Jacksonville (Florida) - geography.

  and southern sections and avoiding the downtown bottleneck where Interstate 95 crosses the Saint Johns River at the Fuller Warren Bridge. In addition to being a regional highway crossroads, the city is a railway hub, with Amtrak passenger service and several freight routes. The city’s expanding airport,located in northern Jacksonville, was the nation’s fastest growing in passenger volume in the mid-1990s. V GOVERNMENT Jacksonville has a mayor-council form of municipal government. The mayor and...

• Whales.

  whales travel to cool waters near the Arctic or Antarctica every summer. They feed on krill , small animals that look like shrimp. In the winter, baleen whales head for warmer waters near the equator tobreed. Other whales do not migrate. Narwhals, for instance, live year-round in the cool waters of the Arctic andNorth Atlantic oceans. HAVING BABY WHALES After male and female whales mate, it takes from 10 to 16 months for a baby whale to form. The lengthof time depends on the whale species. A wh...

• Birds.

  Birds need much less sleep than people do. One seabird, called the sooty tern, can fly for years bytaking “naps” that last only a few seconds. Most birds that live on land are active during the day and sleep at night. Owls are just the opposite.They sleep during the day and hunt at night. Birds usually sleep in shrubs, on tree branches, in holes in trees, or on the ground. Most ducks sleep onthe water. Many birds sleep while they are standing. MATING AND BREEDING Many kinds of birds have only on...

• Big Bang Theory - astronomy.

  hydrogen atoms. Hydrogen atoms can only absorb and emit specific colors, or wavelengths, of light. The formation of atoms allowed many other wavelengths of light,wavelengths that had been interfering with the free electrons prior to the cooling of the universe, to travel much farther than before. This change set free radiation thatwe can detect today. After billions of years of cooling, this cosmic background radiation is at about 3 K (-270°C/-454°F).The cosmic background radiation was first d...

• Obesity.

  of a day, contributing to the development of obesity. V TREATMENTS FOR OBESITY Obesity can become a chronic lifelong condition caused by overeating, physical inactivity, and even genetic makeup. No matter what the cause, however, obesity can beprevented or managed with a combination of diet, exercise, behavior modification, and in severe cases, weight-loss medications and surgery. A Diets The most common and conservative treatment for obesity utilizes a nutritionally balanced, low calorie diet...

• Henry VIII I INTRODUCTION Henry VIII (1491-1547), king of England (1509-1547), the image of the Renaissance king as immortalized by German artist Hans Holbein, who painted him hands on hips, legs astride, exuding confidence and power.

  that was completed by 1540. The crown then took possession of all their property, paying small pensions to the approximately 10,000 monks and nuns who weredeprived of their homes. In a reversal of roles, many towns were forced to assist the same people who had once provided charity to the less fortunate. To pay for hiscontinued wars, Henry sold the former monastic lands to nobles and gentry, who thereby gained an interest in the success of Henry’s reformation and becamedependent upon the king. T...

• Henry VIII.

  that was completed by 1540. The crown then took possession of all their property, paying small pensions to the approximately 10,000 monks and nuns who weredeprived of their homes. In a reversal of roles, many towns were forced to assist the same people who had once provided charity to the less fortunate. To pay for hiscontinued wars, Henry sold the former monastic lands to nobles and gentry, who thereby gained an interest in the success of Henry’s reformation and becamedependent upon the king. T...

• Henry VIII .

  that was completed by 1540. The crown then took possession of all their property, paying small pensions to the approximately 10,000 monks and nuns who weredeprived of their homes. In a reversal of roles, many towns were forced to assist the same people who had once provided charity to the less fortunate. To pay for hiscontinued wars, Henry sold the former monastic lands to nobles and gentry, who thereby gained an interest in the success of Henry’s reformation and becamedependent upon the king. T...

• Women's Swimming: Olympic Gold Medalists.

  1912 Fanny Durack Australia 1:22.2 1920 Ethelda Bleibtrey United States 1:13.6 1924 Ethel Lackie United States 1:12.4 1928 Albina Osipowich United States 1:11.0 1932 Helene Madison United States 1:06.8 1936 Hendrika Mastenbroek The Netherlands 1:05.9 1948 Greta Andersen Denmark 1:06.3 1952 Katalin Szöke Hungary 1:06.8 1956 Dawn Fraser Australia 1:02.0 1960 Dawn Fraser Australia 1:01.2 1964 Dawn Fraser Australia 59.5 1968 Jan Henne United States 1:00.0 1972 Sandra Neilson United States 58.59 1976...

• Gambling.

  C Lotteries Lotteries are another form of gambling. In a lottery, tickets are sold for a set amount and a share of the proceeds is returned to the winners, usually through a randomdraw. Most games allow players to pick their own numbers or let a computer randomly pick for them. Lotteries offer a wide variety of games, including weekly drawings,instant “scratch” tickets, daily games, and superlottos with prizes increasing until there is a winner. Large lottery prizes sometimes exceed $100 millio...

• Moscow (city, Russia) - geography.

  V RECREATION About 30 percent of Moscow’s territory is occupied by parks and public gardens, which were important elements of Soviet city planning. Gorky Park, which providesactivities such as amusement rides and boating, sits on the right bank of the Moscow River; the park’s display of a retired Soviet space shuttle dominates the riverside.The Moscow Zoo is located just west of the city center. The Botanical Gardens, administered by the Russian Academy of Sciences, offers a diverse display of...

• Jerusalem - geography.

  There are many other artifacts in the city, tied to various periods of history; those of Canaanite, Israelite, Greek, Roman, Arab, Crusader, and Ottoman origin areamong the more prominent. Modern attractions include the Israel Museum (completed in 1965), which houses the Shrine of the Book, where the Dead Sea Scrolls areexhibited; the Rockefeller Museum (opened in 1938), which contains archaeological finds; the Yad Vashem Holocaust Museum; the Museum of Biblical Archaeology; theMuseum of Islamic...

• 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...

• 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...

• First Americans.

  bones and artifacts helped 19th-century archaeologists establish the age of ancient human encampments in Europe. Yet, search as they might, American archaeologists found no comparable evidence of a Pleistocene-era human presence. But several sites revealed stone artifacts thatsome scholars believed looked similar to the ancient stone tools found in Europe. On the basis of this similarity, these experts claimed the American artifacts must be asold. By the 1890s, however, other scholars had challe...