Feb 26
Education
Large, international computer network linking tens of millions of users around the world is called the Internet. It is used daily by many individuals for the main purposes of sending and receiving electronic mail (e-mail), obtaining mountains of information on almost any subject, or to communicate with coworkers on projects. Access to the Internet is obtained only by subscription, and an Internet address is needed to receive a message or to send a message to another Internet user. Such addresses have a specific format that specifies the name of the user, the machine they are working on, and where that machine is located. The Internet began as a network of computers, the Advanced Research Projects Agency Network, or ARPANET, supported by the U.S. Defense Department. The National Science Foundation (NSF) supplied funding to extend the network to connect research-based supercomputers at various sites across the U.S. By the end of the decade, the Internet had extended to connect countries from around the world. The World Wide Web, an application that gathers resources from the Internet into a series of menu pages, or screens. The advent of the World Wide Web is undoubtedly one reason for the explosion of home computer use experienced at the close of the twentieth century.
Feb 23
Entertainment
Every kind of sound is produced by vibration. The sound source may be a click of a button, an automobile horn, or a hounding wolf. These waves travel out in all directions, expanding in balloon like fashion from the source of the sound. The vibrations from the source disturb the air in such a way that sound waves are produced. Vibrations that are perceived as sound, if the waves happen to reach someone’s ear, they set up. Sound, depends on three things. There must be a vibrating source to set up sound waves, a receiver to detect them, a medium to carry the waves, and. Sound waves cannot travel through a vacuum. There is an age-old question concerning the definition of sound. If a lamppost falls in a road far from any sound detector (such as a human ear or a microphone), does the lamppost’s crash make any noise? The answer, obviously, depends on how sound is perceived. If it is thought of as the waves that are carried by the air, the answer is yes—wherever there are sound waves there is sound. Whatever it is, some part of it is vibrating while it is producing sound
Feb 20
Technology
The Wilbur and Orville Wright did not try to imitate the flight of bird’s flight, but they built a machine for flying, this was the original flight. A flying machine is exactly what an airplane is. An airplane flies even though it is heavier than air. Supporting it on wings so shaped that the air flowing over them gives them lift it propels itself through the air. Piston-engine and jet-driven aircraft, gliders, helicopters, and winged guided missiles are all included in the term airplane. Airplane by short means any power-driven aircraft with a fixed wing in a narrower sense. This is the general meaning of the word. Aero plane is the form used by the British. They are called as plane in short. An airframe, power plant, instruments, furnishings, and accessories usually form the airplane. The airframe includes the wings, tail assembly, fuselage, engine mount and landing gear. The body of the airplane is called as the fuselage. The airfoils which provide the lift are called the wings .The hinged portions of the wing that control rolling of the airplane are known as Ailerons. The other hinged sections, usually placed at the rear of a wing are called flaps. They increase lift or drag, making possible shorter takeoffs and slower landings.
Feb 17
Entertainment
The film on which images are made is a strip of cellulose acetate that is coated with a light-sensitive emulsion that retains images. It is generally classified by its width. Most theatrical motion pictures are photographed in 35-millimeter or 70-millimeter (wide-screen) film. Virtually all commercial production is done in 16-millimeter film. Amateur and experimental filmmakers often use 8-millimeter or 16-millimeter film. The larger the size of the film, the better the quality of the image obtained. Film raw stock is also graded according to its sensitivity to light. A fast, or high-speed, film requires less light to retain an image than a slow, or low-speed, film. Since the grains of emulsion on fast film are larger than that on slow film, fast film generally has a grainier appearance when projected. Fast film provides a low degree of contrast between black and white tones; slow film provides a greater range of brightness and darkness. In early Technicolor process used three separate films in the camera, each recording the image of a primary color. After development, the three negatives were printed together on a composite color print. All color film production today, however, is done with integral-tripack emulsions, for which only one film is needed.
Feb 14
Society
Many of the regulatory powers of government involve some kind of policing activity. In the United States, for example, the Immigration and Naturalization Service is empowered to apprehend illegal aliens. The Customs Service can inspect anything imported into the country and may search for contraband. The Internal Revenue Service may use any means at its disposal to collect taxes and to prosecute those who fail to file income-tax returns. This article, however, deals with local, state, and national law-enforcement agencies normally described as police forces. The words police and politics are related. Both are derived from the Greek term for city-state and have to do with the administration and oversight of communities of people. Police operations vary from nation to nation. In some states police forces are highly militarized and nearly indistinguishable from the armed forces. Police are nonmilitary groups that have several basic functions. They patrol neighborhoods on foot or in automobiles, seeking by their presence to preserve public order and to discourage lawbreaking. They are in charge of traffic regulation, which means assuring a smooth flow of traffic as well as detaining drivers who break the rules of the road. Police departments are charged with controlling such commercial vice as prostitution, gambling, and narcotics peddling.
Feb 11
Society
Financial institutions are companies that deal in money or money equivalents, such as stocks and bonds. The financial institution that most people know best is the commercial bank—an establishment in which individuals, businesses, government agencies, and even other banks deposit money. From these deposits the bank makes loans to individuals, businesses, government agencies, and other banks. The interest earned on these loans is a chief source of income for the bank. Banking operations of this kind are similar around the world. This article emphasizes commercial banking in the United States. Banks make their profits from interest earned by renting money in the form of loans or by making investments. In order to have money to loan or invest, a bank must first raise the funds—primarily by means of equity capital, deposits, or non deposit funds. Deposits represent the largest source of commercial bank income—usually more than 80 percent. The three main kinds of such accounts are demand, savings, and time deposits. A commercial bank is a corporation, and its owners are the stockholders. From the bank’s profits the stockholders are paid annual dividends. Only a small proportion of a bank’s income—just over 5 percent— comes from equity capital invested in the bank.
Feb 11
Entertainment
The chief doorways of the world of international commerce are its harbors and ports. Through them pass cargoes and travelers from one part of the globe to another. A harbor is any sheltered body of water where boats or ships may moor or anchor. A port is an installation that has been built around a harbor with facilities for loading and unloading such vessels. Ordinarily a harbor, either natural or man-made, must exist before a port facility can be set up. Some large harbors—San Francisco Bay on the California coast, for example—are used by several ports. Some ports, such as Chicago, Ill., on Lake Michigan, are served by several small harbors. The major requirements of a good harbor are direct access to the open water and sufficient depth for vessels to enter and exit safely. Ocean harbors are commonly 40 feet deep or more. The harbor should be well protected against storms and large waves. The bottom of the harbor should provide good holding ground for anchors—it must not be too rocky, too sandy, or too muddy. The harbor should also be spacious enough for ships to ride at anchor and to maneuver. Currents and tides must not be excessive.
Feb 08
Entertainment
Life to future plant is passed on generations by seeds. Flower works to make seed and also vice versa. One purpose of the flower for its beauty is this. Insects and hummingbirds are attracted by the Color and perfume of a flower to aid in the pollination. Only certain insects and no others are admitted by some flowers. The stamens, pistil, and ovary are the chief seed-making parts. To protect these parts, many interesting flower shapes have been developed. If one understands its structure and how each part helps in the work of seed making flower’s beauty and perfection of form may be enjoyed more completely. A typical flower has four sets of organs. From the outside to the center, they are: petals, pistils, sepals and stamens. The leaflike sepals make up the calyx, or “cup.” the corolla is formed by the petals, or “little crown.” The perianth is formed by the calyx and the corolla together. A small leaf below the flower, when present, is the bract. Awns are stiff bristles that terminate some flower parts. There are no sepals or petals at all in the simplest flowers. a single pistil which is surrounded by the small flowers of grasses consist commonly of three stamens surrounding. They are said to be naked. Some flowers have no petals that are they are apetalous.
Feb 05
Education
The most prominent features of the Earth, based primarily on size, are the continents and ocean basins. Plains, plateaus, and mountain ranges are the second most prominent features on the solid parts of the Earth. The continental masses with their major surface features appear to have a high degree of permanence and to be the products of forces that act over extremely long periods of time. Although the term continent generally refers to large and extensive landmasses or main lands, such as continental Europe, it has distinctive meanings in the Earth sciences. Geographically, “continent” refers to the surface of large continuous landmasses that make up about 29.2 percent of the Earth’s surface. These large land areas are: Asia (29.9% of the land area), Africa (20.6 %), North America (14.8%), South America (12%), Antarctica (10.5%), Europe (7 %), and Australia (5.2%).The continents are distributed unevenly over the Earth’s surface. More than 65 percent of all the land area, for example, lies in the Northern Hemisphere, which is sometimes referred to as the “land hemisphere.” The Southern Hemisphere is truly an oceanic realm. Only about 11% of the Southern Hemisphere is above water. The crust of the continents is believed to have originated by a chemical change in which lighter materials from the volcanic basalt of the mantle.
Feb 02
Art
Art is as varied as the life from which it springs. Each artist portrays different aspects of the world. A great artist is able to take some aspect of life and give it depth and meaning. To do this he or she will make use of the many devices common to painting. These devices include composition (the arrangement of the objects within a picture), color, form, and texture. A painter does not always need handsome and attractive subjects. Often an ordinary subject is transformed through artistry. The painting November Evening by United States artist Charles Burchfield depicts simple homes and stores typical of many crossroads towns in the Midwest in the 1930s. Beyond the buildings stretches the vast prairie set against a single human figure. A dark autumn sky covers the landscape. Briefly it may be said that artists paint to discover truth and to create order. They put into their pictures our common hopes, ideals, and passions and show us their meaning and their value. Creators in all the arts make discoveries about the wonders and beauties of nature and the dignity and nobility of man. By finding new relationships among objects, new forms, and new colors, they show us things in our environment which we overlooked or ignored.
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