Sunday, December 30, 2007

Polymer

Polymer is a substance collected of molecules with large molecular mass collected of repeating structural units, or monomers, connected by covalent chemical bonds. The word is resulting from the Greek, πολυ, polu, "many"; and μέρος, meros, "part". Well known examples of polymers contain plastics, DNA and proteins.

While the term polymer in popular usage suggests "plastic", polymers consist of a large class of natural and synthetic materials with a variety of properties and purposes. Natural polymer materials such as shellac and amber have been in utilize for centuries. Biopolymers such as proteins (for example hair, skin and division of the bone structure) and nucleic acids take part in crucial roles in biological processes. A variety of other natural polymers survive, such as cellulose, which is the major constituent of wood and paper.

Tuesday, December 25, 2007

Corporate bond

A corporate bond is a bond issued by a company. The term is usually applied to longer-term debt instruments, normally with a maturity date falling at least a year after their issue date. The term "commercial paper" is sometimes worn for instruments with a shorter maturity.

Sometimes, the term "corporate bonds" is used to include all bonds apart from those issued by governments in their own currency. Strictly speaking, however, it only applies to those issued by corporations.

Sunday, December 16, 2007

Bill of Exchange

A bill of exchange is a printed order by the drawer to the drawee to pay money to the payee. The most general type of bill of exchange is the cheque, which is defined as a bill of exchange drawn on a banker and payable on demand. Bills of exchange are used mainly in international trade, and are written orders by one person to his bank to pay the bearer a specific sum on a specific date sometime in the future.

Prior to the advent of paper currency, bills of exchange were a more important part of trade. They are a quite ancient form of instrument: they were used by medieval trade fairs, such as the Frankfurt Trade Fair.

Sunday, December 09, 2007

Public good

In financial side, a public good is a good that is non-rival and non-excludable. This means that utilization of the good by one individual does not reduce the amount of the good available for consumption by others; and no one can be successfully excluded from using that good. For example, if one individual eats a cake, there is no cake left for anyone else, and it is probable to exclude others from consuming the cake; it is a rival and excludable good, or a private good. Conversely, breathing air does not considerably reduce the amount of air available to others, nor can people be effectively excluded from using the air. This makes it a public good, These are highly hypothetical definitions: in the real world there may be no such thing as an completely non-rival or non-excludable good; but economists think that some goods in the real world approximate closely enough for these concepts to be meaningful.

Friday, November 30, 2007

A Need for Welfare

There is an old joke that asked where you find a welfare recipient’s check beneath his work boots of course. For a long time now, since the specialist formation of a stable government, the U.S government has had the programs and passed laws that either dealt with issues of or prejudiced family. Many of these family programs and laws at present in place today are often and usually debated. One of the most debate and most difficult over family programs or laws are welfare.This is because there is now a smallest amount of income so the poor no longer have the need to go out and assign crimes to reach such money.

Sunday, November 11, 2007

Mobile phone

The introduction of cells for mobile phone base stations, invented in 1947 by Bell Labs engineers at AT&T, was further industrialized by Bell Labs during the 1960s. Due to their low establishment expenses and fast exploitation, mobile phone networks have since spread hastily throughout the world, outstripping the growth of fixed telephony.

The zero generation (0G) of mobile telephones was introduced in 1945. 0G mobile telephones, such as Mobile Telephone Service, were not officially categorized as mobile phones, since they did not sustain the automatic change of channel frequency during calls, which allows the user to shift from one cell (the base station coverage area) to another cell, an attribute called "handover".

The first marketable cellular network was launched in Japan by NTT in 1979. Fully automatic cellular networks were first introduced in the beginning to mid 1980s (the 1G generations) with the Nordic Mobile Telephone (NMT) system in 1981. This was followed by an explosion in mobile telephone habit, particularly in Northern Europe.

The first "modern" network technology on digital 2G (second generation) cellular technology was launched by Radiolinja (now part of Elisa Group) in 1991 in Finland on the GSM standard which also striking the beginning of competition in mobile telecoms when Radiolinja challenged current Telecom Finland (now part of TeliaSonera) who ran a 1G NMT network. A decade after, the first commercial commence of 3G (Third Generation) was again in Japan by NTT DoCoMo on the WCDMA standard. However, Martin Cooper, a Motorola engineer, is accredited with the innovation of the modern mobile phone in the 1990s. Until the early 1990s, most mobile phones were too large to be carried in a jacket pocket, so they were normally installed in vehicles as car phones. With the miniaturization of digital apparatus, mobile phones have become more and handier over the years.

Sunday, November 04, 2007

Funicular

A funicular (from Latin, funiculus, the diminutive of funis, "rope") also called funicular railway, liable railway, inclined plane, or, in the United Kingdom, a rock face railway, is a type of self-contained cable railway in which a cable close to a pair of tram-like vehicles on rails moves them up and down a very steep slope, utilize one ascending and one descending tram cabin to counterbalance each other.
The basic principle of funicular operation is that two cars are attached to each other by a cable, which runs through a pulley at the top of the dispose. Counterbalancing of the two cars, with one ascending and one descending the slope—especially when transporting similar loads, such as passengers —minimizes the attractive effort needed to lift the ascending car.
The usual engineering practice is to splice the cable ends together thereby creating a constant cable loop. The cars are attached equidistantly at differing points on the cable loop. The cable is driven by any resources of winching at one end of the run, and held taut by a tensioning wheel at the other. Other sheeve wheels are employed to guide the cable to and from the drive device and the incline cars. Locomotion is formed by alternately reversing the direction of the drive mechanism so that the cars switch positions on the incline, that is, one up and one down.

Sunday, October 28, 2007

Metabolism

Metabolism is the total set of chemical reactions that occur in living cells. These processes are the source of life, allowing cells to grow and reproduce, maintain their structures, and react to their environments. Metabolism is frequently divided into two categories. Catabolic reactions yield energy, an example being the stop working of food in cellular respiration. Anabolic reactions, on the other hand, use this energy to construct mechanism of cells such as proteins and nucleic acids.

The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is distorted into another by a series of enzymes. Enzymes are vital to metabolism because they allow cells to drive desirable but thermodynamically unfavorable reactions by combination them to favorable ones. Enzymes also agree to the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells.

Tuesday, October 23, 2007

Parrot

Parrots or psittacoses pronounced is an order namely Psittaciformes of birds that includes about 350 species. They are frequently grouped into two families: the Cacatuidae (cockatoo), and the Psittacidae (parrots), but one may find many variations. Some sources split parrots into three families. Citation needed the term "true parrot" is not used by the majority of bird keepers, biologists and lay people and is a source of confusion.
All members of the order have a usually erect stance and a characteristic curved beak shape with the upper mandible having slight mobility in the joint with the skull. All parrots are zygodactyls, with two toes at the front of each foot and two at the flipside, and all parrot eggs are white in color.

Sunday, October 14, 2007

Adam Sandler: the Funniest man Alive!

With a hazardous brand of humor that has brought him legions of dedicated fans, Sandler's hit as an actor, stand-up comic, writer and producer is matched by his performance and songwriting skills. It is an shocking gift for lyric and melody that is front and center on Adam Sandler's very funny new Warner Bros. Records release What is Your surname featuring 14 new Sandler originals include such classics as The Goat Song, the Lonesome Kicker, Bad Boyfriend and Corduroy Blues.
What is Your Name continues the musical tradition Sandler began with at a standard Pace, Ode to My Carnd the extremely popular The Chanukah Song. With two platinum-selling, Grammy-nominated albums - They're All Gonna Laugh at you and What the Hell Happened to Me - Already to his credit, Sandler goes for a comedy-three peat with what’s Your Name. The move to an all-music format is a normal one, following his 21 city tour last summer, when he perform both creative material and his favorite childhood tunes, backed by a finest rock and roll band.

Friday, October 05, 2007

American Beauty

American Beauty is a picture that exposes predetermined ideas about living in suburban America. This movie also becomes an explanation on the human condition while revealing the raw truth of a dysfunctional family. The Burnhams Lester, Carolyn, and Jane establish as the usual middle-class American family. Lester works for a magazine and is not satisfied with his job. He later ends up quit the job and blackmailing his boss for sixty thousand dollars. Carolyn is an actual estate agent, who is eager for success. Their daughter, Jane, is a typical young person, who is unhappy with her life and her parents. The whole termination of their family begins upon the arrival of more than a few new elements that shake up the whole family. This element being their neighbors.
Their next-door neighbors are a gay pair and the Fitts'. Frank Fitts is an aquatic Corps Colonel who suppresses his homosexuality and his relations. He thought of love for Angela because he thinks she is the whole thing that is missing in his life.

Monday, September 24, 2007

The Real Miracle

As far as Miracles is concern, turning salty seawater in to sweet water is quite amazing. Regardless of the scientific clarification being doled out—surplus freshwater flowing from the Mahim River into the sea—the thousand mass to Mahim Creek near the beachfront in Mumbai will pretty see the ‘transubstantiation’ as the deed of the late Haji Maqdoom Baba, whose shrine is in the area. Mass hysteria, of course, is only a term to clarify the hordes of believers filling plastic bottles and drinking the water. But the real miracle would be if those glugging the ‘miraculous’ water manages to flee succumbing to serious gastric illness.

The water of Mahim Creek, sweetened or otherwise, is dirty and would scandalize not only the likes of Sunita Narain of the Centre for Science and Environment. Maharashtra Chief Minister Vilasrao Deshmukh and officials of the Municipal Corporation of Greater Mumbai have already request to people not to drink the water. Industrial waste is not the finest ingredient for a miracle. But telling this to goggle-eyed people facing even more goggle-eyed TV cameras is as worthwhile as persuasive people that a Ganesh idol sipping milk is caused by suction and not godly lactose tolerance.

Fortunately, rumors of the sweetened water turning back to its original brackish form might stop a future surge. Now we only wait for the real miracle of no one complaining of sickness.

Monday, September 10, 2007

Technology

Mobile phones and the network they operate under vary significantly from provider to provider, and nation to nation. However, all of them communicate through electromagnetic microwaves with a cell site base station, the antennas of which are usually mounted on a tower, pole, or building.

The phones have a low-power transceiver that transmits voice and data to the nearest cell sites, usually 5 to 8 miles away. When the cellular phone or data device is turned on, it registers with the mobile telephone exchange, or switch, with its unique identifiers, and will then be alerted by the mobile switch when there is an incoming telephone call. The handset constantly listens for the strongest signal being received from the surrounding base stations. As the user moves around the network, the mobile device will "handoff" to various cell sites during calls, or while waiting between calls it will reselect cell sites.

Cell sites have relatively low-power radio transmitters which broadcast their presence and relay communications between the mobile handsets and the switch. The switch in turn connects the call to another subscriber of the same wireless service provider or to the public telephone network, which includes the networks of other wireless carriers.

Sunday, September 02, 2007

Orange

Orange—specifically, sweet orange—refers to the citrus tree Citrus sinensis and its fruit. The orange is a hybrid of ancient cultivated origin, possibly between pomelo and tangerine. It is a small flowering tree growing to about 10 m tall with evergreen leaves, which are arranged alternately, of ovate shape with crenulated margins and 4–10 cm long. The orange fruit is hesperidia, a type of berry.

Sunday, August 26, 2007

Playground slides

Playground slides are found in parks, schools, playgrounds and backyards around the earth. Slides are constructed of either plastic or metal and they have a soft surface that is either straight or wavy/rippled. Slides are integral parts of playgrounds. The user, normally a child, climbs to the top of the slide via a steps or stairs and sits down on the top of slide and "slides" down the slide. Some slides are directly, others wind their way down. Slides come in different shapes, sizes and colors. Some slides are commercial, found in playground at parks and schools. Other slides are part of residential playgrounds.

Sunday, August 19, 2007

CPU Socket

The term CPU socket is commonly used to describe the connector linking the motherboard to the CPU in certain types of desktop and server computers, particularly those compatible with the Intel x86 architecture.

Most CPU sockets and processors in use today are built around the pin grid array architecture, in which the pins on the base of the processor are inserted into the socket. To aid installation, zero insertion force sockets are usually used, allowing the processor to be inserted without any confrontation, while gripping the pins firmly once the processor is in place to ensure a reliable contact. In contrast to CPU sockets, slot-based processors and CPUs use a single-edged connection rather than a socket, and slot into the motherboard on their side. Slot architectures are not often used today.

Sunday, August 12, 2007

Meteorology

Meteorology is the interdisciplinary scientific study of the ambiance that focuses on weather processes and forecasting. Meteorological phenomena are observable weather events which illuminate and are explained by the science of meteorology. Those actions are bound by the variables that exist in Earth's atmosphere. They are temperature, pressure, water vapor, and the gradients and interactions of each variable, and how they change in time. The majority of Earth's observed weather is located in the troposphere.

Thursday, August 02, 2007

Traffic

Traffic is the movement of motorized vehicles, notarized vehicles and pedestrians on roads. Traffic laws are the laws which govern traffic and regulate vehicles, while rules of the road are both the laws and the informal rules that may have developed over time to facilitate the orderly and timely flow of traffic. Organized traffic normally has well-established priorities, lanes, right-of-way, and traffic control at intersections.

Wednesday, July 25, 2007

digital image

A digital image is an illustration of a two-dimensional image as a finite set of digital values, called picture elements or pixels. The digital image contains a fixed number of rows and columns of pixels. Pixels are the smallest individual element in an image, share quantized values that represent the brightness of a given color at any specific point.

Sunday, July 15, 2007

Krill fishery

Krill fishery is the profitable fishery of krill, small shrimp-like marine animals that live in the oceans world-wide. Estimates for how much krill there is vary wildly, depending on the methodology used. They range from 125–725 million tones of biomass globally. The total global harvest of krill from all fisheries amounts to 150 – 200,000 tones annually, mainly Antarctic krill (Euphausia superb) and North Pacific krill (E. Pacifica).

Krill are rich in protein (40% or more of dry weight) and lipids (about 20% in E. superb). Their exoskeleton amounts to some 2% of dry weight of chitin. They also contain traces of a wide array of hydrolytic enzymes such as proteases, carbohydrates, nucleases and phospholipids, which are intense in the digestive gland in the cephalothoraxes of the krill.

Tuesday, July 10, 2007

A Personal portal

A Personal portal is a site on the World Wide Web that characteristically provides personalized capabilities to its visitors, given that a pathway to other content. It is intended to use distributed applications, different numbers and types of middleware and hardware to provide services from a number of different sources. In addition, business portals are intended to share collaboration in workplaces. A further business-driven requirement of portals is that the content be able to work on multiple platforms such as personal computers, personal digital assistants (PDAs), and cell phones.

Monday, July 02, 2007

Freshwater prawn farm

A freshwater prawn farm is an aquaculture business designed to raise and produce freshwater prawn or shrimp1 for human consumption. Freshwater prawn farming shares many characteristics with, and many of the same problems as, marine shrimp farming. Unique problems are introduced by the developmental life cycle of the main species The global annual production of freshwater prawns (excluding crayfish and crabs) in 2003 was about 280,000 tons, of which China produced some 180,000 tons, followed by India and Thailand with some 35,000 tons each. Additionally, China produced about 370,000 tons of Chinese river crab

Friday, June 29, 2007

Solar System

Solar System consists of the Sun and the other space objects gravitationally bound to it: the eight planets, their 162 known moonsthree currently recognized dwarf planets (including Pluto) and their four known moons, and billions of small bodies. This last group includes asteroids, Kuiper belt objects, comets, meteoroids and interplanetary dust.

In wide terms, the charted regions of the Solar System consist of the Sun, four terrestrial inner planets, an asteroid belt composed of small rocky bodies, four gas giant outer planets, and a second belt, called the Kuiper belt, collected of icy objects. Beyond the Kuiper belt lies the scattered disc, the heliopause, and eventually the hypothetical Oort cloud.

In sort of their distances from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Six of the eight planets are in turn orbited by natural satellites, usually termed "moons" after Earth's Moon, and each of the outer planets is encircled by planetary rings of dust and other particles. All the planets apart from Earth are named after gods and goddesses from Greco-Roman mythology. The three dwarf planets are Pluto, the largest known Kuiper belt object; Ceres, the largest object in the asteroid belt; and Eris, which lies in the scattered disc.

Sunday, June 24, 2007

Society

A society is a grouping of individuals, which is characterized by common interests and may have distinctive culture and institutions. In a society, members can be from a different ethnic group. A "Society" may refer to a particular people, such as the Nuer, to a nation state, such as Switzerland, or to a broader cultural group, such as a Western society. Society can also refer to an organized group of people linked together for religious, benevolent, cultural, scientific, political, patriotic, or other purposes.

Tuesday, June 19, 2007

Fishing

Fishing is the activity of hunting for fish by hooking, trapping, or gathering. By extension, the term fishing is applied to pursuing other aquatic animals such as various types of shellfish, squid, octopus, turtles, frogs, and some edible marine invertebrates. The term fishing is not usually applied to pursuing aquatic mammals such as whales, where the term "whaling" is more appropriate. Fishing is an ancient and worldwide practice with various techniques and traditions and it has been transformed by modern technological developments. In addition to providing food through harvesting fish, modern fishing is both a recreational and professional sport.

Tuesday, June 12, 2007

Kolkata

Calcutta is the capital of the Indian state of West Bengal. It is located in eastern India on the east bank of the River Hooghly. The city has a population of almost 11 million, with an extended metropolitan population of over 14 million, making it the third-largest urban agglomeration and the third-largest city in India.
The city was very populated and served as the capital of India during the British Raj until 1911. Once the centre of modern education, science, culture and politics in India, Kolkata witnessed economic stagnation in the years following India's independence in 1947. However, since the year 2000, an economic rejuvenation has arrested the morbid decline, leading to a spurt in the city's growth. Like other large cities, Kolkata continues to struggle with urbanisation problems like poverty, pollution and traffic congestion.
A vibrant city with a distinct socio-political culture, Kolkata is noted for its revolutionary history, ranging from the Indian struggle for independence to the leftist and trade union movements.

Thursday, June 07, 2007

Batteries

Electronic watches require electricity as a power source. Some mechanical movements and hybrid electronic-mechanical actions also require electricity. Usually the electricity is provided by a replaceable battery.
The first use of electrical power in watches was as replacement for the mainspring, in order to remove the need for winding. The first electrically-powered watch, the Hamilton Electric 500, was released in 1957 by the Hamilton Watch Company of Lancaster, Pennsylvania. Batteries for watches are specially designed for their purpose. They are very small and provide tiny amounts of power incessantly for very long periods. In most cases, replacing the battery requires a trip to a watch-repair shop or watch dealer; this is especially true for watches that are designed to be water-resistant, as special tools and procedures are required to ensure that the watch remains water-resistant after battery replacement. Silver-oxide and lithium batteries are popular today; mercury batteries, formerly quite common, are no longer used, for ecological reasons. Cheap batteries may be alkaline, of the same size as silver-oxide but providing shorter life.

Sunday, June 03, 2007

Titan Industries

Titan Industries is the world's sixth largest wrist watch manufacturer and India's leading producer of watches under the Titan and Sonata brand names. It is a joint business enterprise between India's most respected business organization - the Tata Group and the Tamil Nadu Industrial Development Corporation. Its product portfolio includes watches, clocks, accessories and jewelers, in both contemporary and traditional designs. It exports watches to about 32 countries around the world with manufacturing facilities in Hosur, Dehradun, Goa and manufactures precious jewelers under the Tanishq brand name, making it India's only national jewelers brand. It is an additional of the Tata Group.

Tuesday, May 29, 2007

Nutrition

Nutrition is a science which studies the relationship between diet and states of health and disease. Dietitians are Health professionals who are particular in this area of expertise. They are also the only extremely trained health professionals able to provide safe, evidence-based and accurate dietary advice and interventions.
Between extremes of optimal health and death from starvation or malnutrition, there is an array of disease states that can be caused or alleviated by changes in diet. Deficiencies, excesses and imbalances in diet can produce negative impacts on health, which may lead to diseases such as scurvy, obesity or osteoporosis, as well as mental and behavioral problems. Moreover, excessive ingestion of elements that have no apparent role in health, (e.g. lead, mercury, PCBs, dioxins), may incur toxic and potentially lethal belongings, depending on the dose. The science of nutrition attempts to understand how and why exact dietary aspects influence health.

Monday, May 21, 2007

Joystick

A joystick is a personal computer tangential or general control device consisting of a handheld stick that pivots about one end and transmits its angle in two or three dimensions to a computer. Joysticks are often used to control video games, and generally have one or more push-buttons whose state can also be read by the computer. The term joystick has become a synonym for game controllers that can be connected to the computer since the computer defines the input as a "joystick input”. Apart for controlling games; joysticks are also used for controlling machines such as elevators, cranes, trucks, powered wheelchairs and some zero turning radius lawn mowers. More lately miniture joysticks have been adopted as navigational devices for smaller electronic apparatus such as mobile phones.

Tuesday, May 15, 2007

Metal

In chemistry, a metal is a constituent that readily loses electrons to form positive ions and has metallic bonds between metal atoms. Metals form ionic bonds with non-metals. They are sometimes described as a web of positive ions surrounded by a cloud of delocalized electrons. The metals are one of the three groups of elements as eminent by their ionization and bonding properties, along with the metalloids and nonmetals. On the periodic table, a diagonal line drawn from boron separates the metals from the nonmetals. Most elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals.

A modern definition of metals is that they have overlapping conveyance bands and valence bands in their electronic structure. This definition opens up the category for metallic polymers and other organic metals, which have been prepared by researchers and employed in high-tech devices. These synthetic materials often have the characteristic silvery-grey reflective ness of elemental metals.

Wednesday, May 09, 2007

Finance

Finance studies and addresses the ways in which individuals, businesses, and organizations raise, allocate, and use financial income over time, taking into account the risks entailed in their projects. The term finance means the study of money and other assets; the activity of finance is the relevance of a set of techniques that individuals and organizations (entities) use to control their financial affairs, particularly the differences between income and expenditure and the risks of their investments.

An entity whose income exceeds its expenditure can lend or invest the excess income. On the other hand, an entity whose income is less than its expenditure can raise assets by borrowing or selling impartiality claims, decreasing its expenses, or increasing its income. The lender can find a borrower, a financial intermediary, such as a bank or buy notes or bonds in the bond market. The lender receives interest, the borrower pays a higher interest than the lender receives, and the financial intermediary pockets the difference.

Finance is used by individuals (personal finance), by governments (public finance), by businesses (corporate finance), etc., as well as by a broad variety of organizations including schools and non-profit organizations. In general, the goals of each of the above activities are achieved through the use of suitable financial instruments, with consideration to their institutional setting.

Finance is one of the most important aspects of business management. Without proper financial planning a new enterprise is unlikely to be successful. Managing money is essential to guarantee a secure future, both for the individual and an organization.

Thursday, May 03, 2007

Solar System

Solar System consists of the Sun and the other space objects gravitationally bound to it: the eight planets, their 162 known moonsthree currently recognized dwarf planets (including Pluto) and their four known moons, and billions of small bodies. This last group includes asteroids, Kuiper belt objects, comets, meteoroids and interplanetary dust.

In wide terms, the charted regions of the Solar System consist of the Sun, four terrestrial inner planets, an asteroid belt composed of small rocky bodies, four gas giant outer planets, and a second belt, called the Kuiper belt, collected of icy objects. Beyond the Kuiper belt lies the scattered disc, the heliopause, and eventually the hypothetical Oort cloud.

In sort of their distances from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Six of the eight planets are in turn orbited by natural satellites, usually termed "moons" after Earth's Moon, and each of the outer planets is encircled by planetary rings of dust and other particles. All the planets apart from Earth are named after gods and goddesses from Greco-Roman mythology. The three dwarf planets are Pluto, the largest known Kuiper belt object; Ceres, the largest object in the asteroid belt; and Eris, which lies in the scattered disc.

Sunday, April 29, 2007

Nanotechnology

Nanotechnology is a pasture of applied science and technology covering a wide range of topics. The main unifying premise is the control of matter on a scale smaller than 1 micrometer, normally between 1-100 nanometers, as well as the manufacture of devices on this same length scale. It is a highly multidisciplinary field, drawing from fields such as colloidal science, device physics, and supra molecular chemistry. Much hypothesis exists as to what new science and technology might result from these lines of research. Some view nanotechnology as a marketing term that describes pre-existing lines of research applied to the sub-micron size scale.

In spite of the apparent ease of this definition, nanotechnology actually encompasses diverse lines of inquiry. Nanotechnology cuts across many disciplines, together with colloidal science, chemistry, applied physics, materials science, and even mechanical and electrical engineering. It could variously be seen as an extension of existing sciences into the Nanoscale, or as a recasting of existing sciences using a newer, more recent term. Two major approaches are used in nanotechnology: one is a "bottom-up" approach where materials and devices are built from molecular components which gather themselves chemically using principles of molecular gratitude; the other being a "top-down" approach where nano-objects are constructed from larger entities without atomic-level control.

Monday, April 23, 2007

Dot matrix printer

Not like a typewriter or daisy wheel printer, letters are drawn out of a dot matrix, and thus, varied fonts and arbitrary graphics can be produced. Because the printing involves mechanical pressure, these printers can create carbon copies and carbonless copies. A dot matrix printer or impact matrix printer refers to a type of computer printer with a print head that runs back and forth on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter.

Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which uses the power of a tiny electromagnet or solenoid to drive it forward, either directly or through small levers. Facing the ribbon and the paper is a small guide plate pierced with holes to serve as guides for the pins. The moving portion of the printer is called the print head, and prints one line of text at a time. Most dot matrix printers have a single vertical line of dot-making equipment on their print heads; others have a few interleaved rows in order to improve dot density.

These machines can be highly hard-wearing, but eventually wear out. Ink invades the guide plate of the print head, causing grit to adhere to it; this grit slowly causes the channels in the guide plate to wear from circles into ovals or slots, given that less and less accurate guidance to the printing wires. After about a million characters, even with tungsten blocks and titanium pawls, the printing becomes too indistinct to read.

Thursday, April 19, 2007

Croydon Airport

Croydon Airport is in south London on the borders of the London Boroughs of Croydon and Sutton. It was once the main airport for London, before it was replaced by Northolt Aerodrome, London Heathrow Airport and London Gatwick Airport.It originated as two adjacent World War I airfields. Beddington Aerodrome, one of a number of small airfields around London which had been formed for protection against the Zeppelin raids in about May 1915, and Waddon Aerodrome of 1918, a test-flight aerodrome adjoining National Aircraft Factory No1.At the end of that war, the two airfields were joint into London's official airport as the gateway for all international flights to and from the capital. Croydon Aerodrome opened on 29 March 1920.It stimulated a increase in regular scheduled flights carrying passengers, mail and freight, the first destinations being Paris, Amsterdam and Rotterdam. In 1923 Berlin flights were added. It was the operating base for Imperial Airways - remembered in the road name Imperial Way on the site today.In the mid 1920s, the airfield was extended, some adjacent roads being permanently closed to allow heavier airliners to land and depart safely. A new complex of buildings was constructed adjoining Purley Way, including the first purpose-designed air terminal in the world, the Aerodrome Hotel and extensive hangars, all opening on 2 May 1928.The terminal building, the booking hall inside it with its gallery balustraded in the geometrical design typical of the period, and the Aerodrome hotel were all built in the Art Deco style of the 1920s and 1930s. A further item that caught the eye of visitor and traveller alike was the time zone tower in the booking hall with its dials depicting the times in different parts of the world.The aerodrome was known the world over, its fame being spread by the many aviators and pioneers who touched down at Croydon.

Tuesday, April 10, 2007

Postage Stamp

A postage stamp is proof of pre-paying a fee for postal services. Usually a small paper rectangle which is attached to an envelope, signifying that the person sending the letter or package has paid for delivery; it is the most popular option to using a prepaid-postage envelope.

History

In it he argued that it would be well again for the sender to pay the cost of delivery, rather than the addressee who could refuse the letter if they could not or did not want to pay, as occasionally happened at the time. He also argued for a identical rate of one penny per letter, no matter where its end. Accounting costs for the government would thus be cut; postage would no longer be charged according to how far a letter had traveled, which necessary each letter to have an individual entry in the Royal Mail's accounts. Chalmers' ideas were finally adopted by Parliament in August, 1839 and the General Post Office launched the Penny Post service the next year in 1840 with two prepaid-postage symbolic envelopes or wrappers: one valued at a penny and one valued at two pence.

Friday, April 06, 2007

Clock face

100 A clock faces is the part of an analog clock that tells time from side to side the use of a fixed numbered dial or dials and moving hand or hands. Typically, the dial is numbered 1-12 representative the hours in a 12-hour cycle. The term face is also used for the time display on digital clocks and watches.

Certain clocks have 24-hour analog displays and are noticeable consequently. Some special purpose clocks, such darkroom timers and sporting occasion clocks are designed for measuring periods less than one hour. Clocks can indicate the hour with roman numerals or Arabic numerals. The two numbering systems have also been used in mixture with the prior representing the hour and the later the minute. Long case clocks typically use Roman numerals for the hours. Clocks using only Arabic numerals first began to appear in the mid-18th century. In some instances, mainly in the case of watches, the numbers are replaced with undifferentiated hour markings. Infrequently markings of any sort are dispensed with. The face of the Movado "Museum Watch" is known for a single dot at the 12 o'clock position.

Historical and Stylistic Development
Before the late 15th century, a fixed hand indicated the hour by pointing to rotating numbers. Minute hands only came into use in the late 17th century after the discovery of the pendulum allowed for increased accuracy in time telling. Until the last quarter of the 17th century hour markings were etched into metal faces and the recesses filled with black wax. Subsequently, higher contrast and improved readability was achieved with white enamel plaques painted with black numbers. Initially, the numbers were printed on small, individual plaques mounted on a brass substructure. This was not a stylistic decision; rather enamel production technology had not yet achieved the skill to create large pieces of enamel. The "13 piece face" was an early attempt to create an completely white enamel face. As the name suggests, it was composed of 13 enamel plaques: 12 numbered wedges en suite around a circle. The first single piece enamel faces, not unlike those in production today, began to appear c. 1735.

Monday, April 02, 2007

Sunglasses

Sunglasses are a kind of visual correction aid, variously termed spectacles or glasses, which feature lenses that are coloured or darkened to screen out strong light from the eyes.Many people find direct sunlight too bright to be comfortable, particularly when reading from paper on which the sun directly shines. In outdoor activities like skiing and flying, the eye can receive more light than usual. It has been recommended to wear these kind of glasses on sunny days to protect the eyes from ultraviolet radiation, which can lead to the development of a cataract. Sunglasses have also been linked with celebrities and film actors mainly due to the desire to mask identity, but in part due to the lighting involved in production being typically stronger than natural light and uncomfortable to the naked eye.Augusto Pinochet sits with sunglasses in the front of the Chilean JuntaContents

Thursday, March 29, 2007

British coinage

Obverse and turn around of ordinary coins in current movement, £2, £1, 50p, 20p, 10p, 5p, 2p and 1pThe British currency was decimalized on February 15, 1971. The basic unit of currency – the Pound – was unchanged. Previous to decimalization there were 240 pennies in a pound, now there are 100 new pence. The new coins were noticeable with the wording "New Penny" or "New Pence" to discriminate them from the old. The word new was drop after ten years. The representation p was also adopted to tell apart the new pennies from the old, which used the sign d.

The initial pound coin was introduced in 1983 to replace the Bank of England £1 banknote which was discontinues in 1984. A circulating bimetallic £2 coin was also introduced in 1998– there had until that time been remembrance £2 coins which did not normally circulate. The total amount of coinage in exchange is approximately three and a quarter billion pounds, of which the £1 and £2 coins account for almost two billion pounds.

Every year, newly mint coins are checkered for size, weight, and work of art at a Trial of the Pyx. Fundamentally the same process has been used since the thirteenth century. Assay is now done by the Worshipful Company of Goldsmiths on behalf of HM Treasury.

The Honda History

In 1997 Honda begins produce a street-oriented GT motorcycle using an in history significant name: Super hawk. The earlier Super hawk was a similar twin motorcycle that Robert M. Pirsing rides in "Zen and the Art of Motorcycle Maintenance". The unique Super hawk was a profitable achievement, therefore the name being recycled. The new Super hawk was introduced after the Ducati 916 made V-twin sport bikes popular again. The fresh Super hawk uses an all new 90 degree V-twin. The bike bring in a number of fresh design concept such as the "pivot less frame", side radiators, single cast engine case, connecting rods with cap screw in its place of nuts, and the major carburetors Honda ever put on a motorcycle. "Pivot less frame" inevitable that engine was a harassed member with the swing arm bolted directly to the engine. The bike was released in 1997 as an early release 1998 model year. One motorcycle magazine recommended that this bike was the fastest 0-60 mph manufacture bike at the time. A racing version of the bike was predictable from Honda. Honda formed in 2000 the RVT1000R known outside the United States as the VTR1000SP, although the bike had only four engine parts in common with the modern Super hawk. The RC51 was an completely new V-twin racing platform that won the World Super bike championship its first year race through Colin Edwards and the Castrol team.

Friday, March 23, 2007

Longships

Longships, langskip or drakkar were boats used by the Scandinavians and Saxons for their raids on costal and inland settelments. They were the epitome of Scandinavian military power and ranked extremely as precious material possessions.
The longship was a long, narrow, light boat with shallow draft, with oars along approximately the entire length of the boat. Later versions sported a rectangular sail on a single mast to augment the rowers particularly during longer journeys. In combat the variabilily of wind power made rowers the chief means of propulsion. virtually all longships were clinker built and waterproofed by moss drenched in tar. The ship's low mass and shallow keel permitted navigation in waters just 1 meter deep, rapid beaching when landing on beaches, and portage over land.
Construction
Our best evidence for longship building comes from ship-burials. It was common in Viking society for kings to be buried under a long burial mound in a ship with rich possessions. The Oseberg ship burial in Norway and the Anglo Saxon longship of Sutton Hoo in England are both good examples.
Longships were extraordinarily narrow for their length compared to modern standards The main discovered longship (at Roskilde harbor) is 35m in length, and the longship from Hedeby harbour has the largest length/width proportion: 11.4 to 1. However, later longships, optimized for sailing, had lower ratios, often 1 to 7 or even 1 to 5.
In contrast, Scandinavian trade ships or knarrs were built deeper and broader to accommodate bulkier cargo, and were more reliant on sails. A similar relationship may be seen in Mediterranean galleys, which are now and then called longships as well, and their merchant vessels, which were roundships.
Rectangular sails made of wool strengthened by leather were introduced later. Under sail, longships were very fast, achieving speeds of 14 knots. They were also extremely seaworthy, but, being essentially open boats, not very habitable. However, this did not stop early Scandinavian explorers from discovering and settling in Iceland, Greenland, and Canada, all well before Christopher Columbus landed in the Bahamas in 1492.

Monday, March 19, 2007

Helicopter

A helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers). Helicopters are classified as rotary-wing aircraft to differentiate them from conventional fixed-wing aircraft. The word helicopter is resulting from the Greek words helix (spiral) and pteron (wing). The engine-driven helicopter was invented by the Slovak inventor Jan Bahyl. The first stable, fully-controllable helicopter located in production was invented by Igor Sikorsky.
Compared to conventional fixed-wing aircraft, helicopters are much more complex, more expensive to buy and operate, comparatively slow, have shorter range and restricted payload. The compensating advantage is maneuverability: helicopters can hover in place, reverse, and above all take off and land vertically. Subject only to refuelling facilities and load/altitude limitations, a helicopter can travel to any location, and land wherever with a clearing a rotor disk and a half in diameter

Tuesday, March 13, 2007

Baking powder

Baking Powder is a dry chemical leavening agent used in baking and deodorizing. There are some formulations; all contain an alkali, characteristically sodium bicarbonate (baking soda), and an acid in the form of salt crystals, together by means of starch to keep it dry. When dissolved in water the acid and alkali react and emit carbon dioxide gas, which expands existing bubbles to leaven the mixture. Most current baking powders are double acting, that is, they have two acid salts, one which reacts at room temperature, producing a rise as soon as the dough or batter is ready, and another which reacts at a higher temperature, causing a additional rise during baking. Baking powders that have only the low-temperature acid salts are called single acting. Many recipes call for a process called creaming, where butter and sugar are beaten together to initiate tiny seed bubbles which the leavening gas will more expand.

Common low-temperature acid salts comprise cream of tartar, calcium phosphate, and citrate. High-temperature acid salts are regularly aluminium salts, such as calcium aluminum phosphate. They can be establish not only in many baking powders, but also in many non-dairy coffee creamers. Excess aluminium in the diet may be detrimental to human health, and so baking powders are available without it for people who are concerned and those sensitive to the taste.

While a variety of baking powders were sold in the first half of the 19th century, our modern variants were exposed by Alfred Bird. Eben Norton Horsford, a student of Justus von Liebig, who began his studies on baking powder in 1856, ultimately developed a variety he named in honor of Count Rumford. August Oetker, a German pharmacist, made baking powder very popular when he began selling his mixture to housewives. The same recipe he produced in 1891 is still sold as Backin in Germany. Oetker started the mass production of baking powder in 1898 and patented his technique in 1903.

Thursday, March 08, 2007

Assam tea

Assam is a black tea named after the region of its manufacturing:(Assam, India). This tea grown-up at sea level is known for its body, briskness, malty flavor, and strong, bright color. Assam teas, or blends containing Assam, are often sold as "breakfast" teas. English Breakfast tea, Irish Breakfast tea, and Scottish Breakfast Tea are ordinary trade names.
Though "Assam" in general denotes the distinctive black teas from Assam, the region produces relatively smaller quantities of green and white teas as well with their own distinctive characteristics.
Historically, Assam is the second commercial tea making region after China. China and Assam are the only two regions in the world by means of native tea plants. Assam tea revolutionized tea drinking habits in the 19th century since the tea, produced from a different range of the tea plant, yielded a different kind of tea.

Sunday, March 04, 2007

Honey formation

Honey is laid by bees as a food source. In cold weather or when food sources are scarce, bees use their stored honey as their source of energy. By contriving for the bee group to make its home in a hive, people have been able to semi-domesticate the insects. In the hive there are three types of bee: the single queen bee, a seasonally variable number of drone bees to fertilize new queens and some 20,000 to 40,000 worker bees. The worker bees raise larvae and collect the nectar that will happen to honey in the hive. They go out, collect the sugar-rich flower nectar and return to the hive. As they leave the flower, bees release Nasonov pheromones. These enable other bees to find their way to the site by smell. Honeybees also release Nasonov pheromones at the entrance to the hive, which enables returning bees to return to the proper hive. In the hive the bees use their "honey stomachs" to ingest and repeat the nectar a number of times until it is partially digested. It is then stored in the honeycomb. Nectar is high in both water content and natural yeasts which, unchecked, would reason the sugars in the nectar to ferment. After the final regurgitation, the honeycomb is left unsealed. Bees inside the hive fan their wings, creating a strong draft across the honeycomb. This enhances evaporation of much of the water from the nectar. The lessening in water content, which raises the sugar concentration, prevents fermentation. Ripe honey, as removed from the hive by the beekeeper, has a long shelf life and will not ferment.
The beekeeper encourages overproduction of honey within the hive so that the excess can be taken without endangering the bees. When sources of foods for the bees are short the beekeeper may have to feed the bees other forms of sugar so they can survive.

Honey is laid by bees as a food source. In cold weather or when food sources are scarce, bees use their stored honey as their source of energy. By contriving for the bee group to make its home in a hive, people have been able to semi-domesticate the insects. In the hive there are three types of bee: the single queen bee, a seasonally variable number of drone bees to fertilize new queens and some 20,000 to 40,000 worker bees. The worker bees raise larvae and collect the nectar that will happen to honey in the hive. They go out, collect the sugar-rich flower nectar and return to the hive. As they leave the flower, bees release Nasonov pheromones. These enable other bees to find their way to the site by smell. Honeybees also release Nasonov pheromones at the entrance to the hive, which enables returning bees to return to the proper hive. In the hive the bees use their "honey stomachs" to ingest and repeat the nectar a number of times until it is partially digested. It is then stored in the honeycomb. Nectar is high in both water content and natural yeasts which, unchecked, would reason the sugars in the nectar to ferment. After the final regurgitation, the honeycomb is left unsealed. Bees inside the hive fan their wings, creating a strong draft across the honeycomb. This enhances evaporation of much of the water from the nectar. The lessening in water content, which raises the sugar concentration, prevents fermentation. Ripe honey, as removed from the hive by the beekeeper, has a long shelf life and will not ferment.
The beekeeper encourages overproduction of honey within the hive so that the excess can be taken without endangering the bees. When sources of foods for the bees are short the beekeeper may have to feed the bees other forms of sugar so they can survive.

Honey is laid by bees as a food source. In cold weather or when food sources are scarce, bees use their stored honey as their source of energy. By contriving for the bee group to make its home in a hive, people have been able to semi-domesticate the insects. In the hive there are three types of bee: the single queen bee, a seasonally variable number of drone bees to fertilize new queens and some 20,000 to 40,000 worker bees. The worker bees raise larvae and collect the nectar that will happen to honey in the hive. They go out, collect the sugar-rich flower nectar and return to the hive. As they leave the flower, bees release Nasonov pheromones. These enable other bees to find their way to the site by smell. Honeybees also release Nasonov pheromones at the entrance to the hive, which enables returning bees to return to the proper hive. In the hive the bees use their "honey stomachs" to ingest and repeat the nectar a number of times until it is partially digested. It is then stored in the honeycomb. Nectar is high in both water content and natural yeasts which, unchecked, would reason the sugars in the nectar to ferment. After the final regurgitation, the honeycomb is left unsealed. Bees inside the hive fan their wings, creating a strong draft across the honeycomb. This enhances evaporation of much of the water from the nectar. The lessening in water content, which raises the sugar concentration, prevents fermentation. Ripe honey, as removed from the hive by the beekeeper, has a long shelf life and will not ferment.
The beekeeper encourages overproduction of honey within the hive so that the excess can be taken without endangering the bees. When sources of foods for the bees are short the beekeeper may have to feed the bees other forms of sugar so they can survive.

Tuesday, February 27, 2007

Porridge

Porridge is a simple dish prepared by boiling oats , occasionally oatmeal or another meal in water, milk or both. Oat and semolina porridge are in different countries the most popular varieties. Some other meals used for porridge include rice, wheat, peasemeal, barley, and cornmeal.
In many cultures, it is eaten as a breakfast, often with the addition of sugar or cream. As the usual breakfast of Scotland ,it is made with salt. Some manufacturers of breakfast cereal sell "ready-made" versions; aficionados question whether these can truly be called porridge. Gruel is a thin porridge made with water.

Thursday, February 22, 2007

The Institution of Engineers

The Institution of Engineers (IEI) was established by Sir Thomas Holland and others in Madras in 1920. In 1935, it obtained the Royal Charter from King George V to promote and move ahead the art, science and practice of engineering and technology in India.
The first President of the Institution was Sir Thomas R J Ward. Sir Thomas Guthrie Russell played a key role in the winning petition for a Royal Charter. The current President is Prof S C Naik.
The organization has been prominent amongst the founder members of the Commonwealth Engineers' Council and the Federation of Engineering Institutions of South and Central Asia. The Institution has a conditional membership of the Engineers Mobility Forum since 2003.
Today, the Institution is head-quartered in Kolkata, with 94 state and local centres. With half a million members, it is one of the biggest professional bodies in the English-speaking world. Life corporate members of the Institution are accredited with the Chartered Engineer title.

Sunday, February 18, 2007

Heart cancer

Heart cancer is an very rare form of cancer of the heart. Heart cancer is separated into primary tumors of the heart and secondary tumors of the heart. Most heart cancers are benign of myxomas, fibromas, rhabdomyomas and hamartomas, although malignant sarcomas (such as angiosarcoma or cardiac sarcoma) have been well-known to occur. In a learning of 12,487 autopsies performed in Hong Kong seven cardiac tumors were found, most of which were benign. However, cancer can also reach to heart from other parts of the body. In addition the heart can be affected by handling for cancer in other parts of the body.

Sunday, February 11, 2007

Diamond

Diamonds do not show all of their attractiveness as rough stones; instead, they must be cut and polished to exhibit the characteristic fire and intensity that diamond gemstones are known for. Diamonds are cut into a variety of shapes that are commonly designed to accentuate these features.Diamonds which are not cut to the specifications of round brilliant shape (or subsequent variations) are known as "fancy cuts." Popular fancy cuts include the baguette (from the French, meaning rod or loaf of bread), marquise, princess (square outline), heart, briolette (a form of the rose cut), and pear cuts. Newer cuts that have been introduced into the jewelry industry are the "cushion" "radiant"(similar to princess cuts, but with rounded edges instead of square edges) and "Asscher" cuts. Many fancy colored diamonds are now being cut according to these new styles. Generally speaking, these "fancy cuts" are not held to the same strict standards as Tolkowsky-derived round brilliants and there are less specific mathematical guidelines of angles which determine a well-cut stone. Cuts are influenced heavily by fashion: the baguette cut—which accentuates a diamond's luster and downplays its fire—was all the rage during the Art Deco period, whereas the princess cut—which accentuates a diamond's fire rather than its luster—is currently gaining popularity. The princess cut is also popular amongst diamond cutters: of all the cuts, it wastes the least of the original crystal. The past decades have seen the development of new diamond cuts, often based on a modification of an existing cut. Some of these include extra facets. These newly developed cuts are viewed by many as more of an attempt at brand differentiation by diamond sellers, than actual improvements to the state of the art

Monday, February 05, 2007

Infrared

Infrared (IR) emission is electromagnetic emission of a wavelength longer than that of noticeable light, but shorter than that of radio waves. The name means "below red" (from the Latin infra, "below"), red being the color of detectable light of longest wavelength. Infrared radiation spans three instructions of magnitude and has wavelengths between about 750 nm and 1 mm.
These divisions are suitable by the different human response to this radiation: near infrared is the area closest in wavelength to the radiation detectable by the human eye, mid and far infrared are gradually further from the visible regime. Other definitions follow different physical mechanisms (emission peaks, vs. bands, water absorption) and the newest follow technical reasons (The common silicon detectors are sensitive to about 1,050 nm, while Inga As sensitivity starts around 950 nm and ends between 1,700 and 2,600 nm, depending on the specific configuration). Unfortunately the international standards for these specifications are not currently obtainable.
The boundary between visible and infrared light is not precisely defined. The human eye is markedly less responsive to light above 700 nm wavelength, so longer frequencies make irrelevant contributions to scenes illuminated by common light sources. But particularly strong light (e.g., from lasers, or from bright daylight with the visible light removed by colored gels [1]) can be detected up to approximately 780 nm, and will be apparent as red light. The onset of infrared is defined (according to different standards) at different values typically between 700 nm and 780 nm.

Thursday, January 25, 2007

Journalism Basics

Journalism is a concrete, professionally oriented major that involves gathering, interpreting, distilling, and other reporting information to the general audiences through a variety of media means. Journalism majors learn about every possible kind of Journalism (including magazine, newspaper, online journalism, photojournalism, broadcast journalism, and public relations).
That's not all, though. In addition to dedicated training in writing, editing, and reporting, Journalism wants a working knowledge of history, culture, and current events. You'll more than likely be required to take up a broad range of courses that runs the range from statistics to the hard sciences to economics to history. There would also be a lot of haughty talk about professional ethics and civic responsibility too - and you'll be tested on it. To top it all off, you'll perhaps work on the university newspaper or radio station, or possibly complete an internship with a magazine or a mass media conglomerate.