Friday, December 28, 2007

ASIMO

ASIMOis a humanoid robot created by Honda Motor Company. Standing at 130 centimeters (4 feet 3 inches) and weighing 54 kilograms (119 pounds), the robot resembles a small astronaut wearing a backpack and can walk on two feet at speeds up to 6 km/h (3.7 mph). ASIMO was created at Honda's Research & Development Wako Fundamental Technical Research Center in Japan. It is the current model in a line of eleven that began in 1986 with E0.

Officially, the name is an acronym for "Advanced Step in Innovative MObility". Honda's official statements indicate that the robot's name is not a reference to science fiction writer and inventor of the Three Laws of Robotics, Isaac Asimov. In Japanese, the name is pronounced ashimo and, not coincidentally, means "legs also" (from Japanese 足も).

Wednesday, December 19, 2007

Local area network

A local area network is a network that spans a relatively small space and provides services to a small amount of people. Depending on the amount of people that use a Local Area Network, a peer-to-peer or client-server method of networking may be used. A peer-to-peer network is where each client shares their resources with other workstations in the network. Examples of peer-to-peer networks are: Small office networks where resource use is minimal and a home network. A client-server network is where every client is connected to the server and each other. Client-server networks use servers in different capacities. These can be classified into two types: Single-service servers, where the server performs one task such as file server, print server, etc.; while other servers can not only perform in the capacity of file servers and print servers, but they also conduct calculations and use these to provide information to clients (Web/Intranet Server). Computers are linked via Ethernet Cable, can be joined either directly (one computer to another), or via a network hub that allows multiple connections.

Historically, LANs have featured much higher speeds than WANs. This is not necessarily the case when the WAN technology appears as Metro Ethernet, implemented over optical transmission systems.

Wednesday, December 12, 2007

Nanomaterials

A number of physical phenomena become noticeably pronounced as the size of the system decreases. These include statistical mechanical effects, as well as quantum mechanical effects, for example the “quantum size effect” where the electronic properties of solids are altered with great reductions in particle size. This effect does not come into play by going from macro to micro dimensions. However, it becomes dominant when the nanometer size range is reached. Additionally, a number of physical properties change when compared to macroscopic systems. One example is the increase in surface area to volume of materials. This catalytic activity also opens potential risks in their interaction with biomaterials.

Materials reduced to the nanoscale can suddenly show very different properties compared to what they exhibit on a macroscale, enabling unique applications. For instance, opaque substances become transparent (copper); inert materials become catalysts (platinum); stable materials turn combustible (aluminum); solids turn into liquids at room temperature (gold); insulators become conductors (silicon). A material such as gold, which is chemically inert at normal scales, can serve as a potent chemical catalyst at nanoscales. Much of the fascination with nanotechnology stems from these unique quantum and surface phenomena that matter exhibits at the nanoscale.

Thursday, December 06, 2007

Movement from cell to cell and handover

The use of multiple cells means that, if the distributed transceivers are mobile and moving from place to place, they also have to change from cell to cell. The mechanism for this differs depending on the type of network and the circumstances of the change. For example, if there is an ongoing continuous communication and we don't want to interrupt it, then great care must be taken to avoid interruption. In this case there must be clear coordination between the base station and the mobile station. Typically such systems use some kind of multiple access independently in each cell, so an early stage of such a handover (handoff) is to reserve a new channel for the mobile station on the new base station which will serve it. The mobile then moves from the channel on its current base station to the new channel and from that point on communication takes place. The exact details of the mobile system's move from one base station to the other varies considerably from system to system. For example, in all GSM handovers and W-CDMA inter-frequency handovers the mobile station will measure the channel it is meant to start using before moving over. Once the channel is confirmed okay, the network will command the mobile station to move to the new channel and at the same time start bi-directional communication there, meaning there is no break in communication. In CDMA2000 and W-CDMA same-frequency handovers, both channels will actually be in use at the same time (this is called a soft handover or soft handoff). In IS-95 inter-frequency handovers and older analog systems such as NMT it will typically be impossible to measure the target channel directly whilst communicating. In this case other techniques have to be used such as pilot beacons in IS-95. This means that there is almost always a brief break in the communication whilst searching for the new channel followed by the risk of an unexpected return to the old channel.

Wednesday, November 28, 2007

What is Just-in-time compilation?

In computing, just-in-time compilation (JIT), as well known as dynamic translation, is a method for improving the runtime presentation of a computer program. JIT builds upon two earlier ideas in run-time environments: they are the bytecode compilation and dynamic compilation. It transfers code at runtime prior to executing it natively, for instance bytecode into native machine code. The performance progress over interpreters originates from caching the results of translating blocks of code, and not just reevaluating each line or operand every time it is met. It as well has advantages more than statically compiling the code at development time, as it can recompile the code if this is found to be advantageous, and it possibly will be able to enforce security guarantees. Therefore JIT can combine the advantages of interpretation and can go with or exceed the performance of static compilation.

Wednesday, November 21, 2007

A short History of C++

C++ programming language was created by Bjarne Stroustrup in 1983 at Bell Laboratories. It is an expansion of C by adding several enhancements to C language. Bjarne combined the simula's(a language intended for making simulations, created by Ole-Johan Dahl and Kristen Nygaard) features of object oriented and to create more efficiency of C. The new features added to C++ programming language are the templates, namespaces, exception handling and use of standard library.

Wednesday, November 14, 2007

What do you mean by Touring car racing?

The Touring car racing is a common term for numerous distinct automobile racing competitions in heavily-modified street cars. It is particularly popular in Britain, Germany, Scandinavia, and in the Australia.

What and all constitute a touring car?

While rules differ from country to country, the majority series need that the competitors start with a standard body shell, but almost every other component is acceptable to be heavily modified for racing, together with engines, suspension, brakes, wheels and the tires. The Wings are generally added to the front and rear of the cars. The Regulations are generally designed to limit costs by banning some of the more exotic technologies available (for example, many series insist on a "control tire" that all competitors must use) and keep the racing close (at times by a "lead trophy" where winning a race requires the winner's car to be heavier for following races). In this, it shares a number of similarities with the American NASCAR series, but raced completely on road courses and street circuits rather than the American series' mainly oval tracks.

Thursday, November 01, 2007

Rules and regulations of Relay race competition

Each runner has to hand off the baton to the next runner within a firm zone, generally marked by triangles on the track. In sprint relays, runners normally use a “blind handoff”, where the second runner stands on a mark line predetermined in practice and begin running when the first runner hits a visual point of the line on the track (generally a smaller triangle). The second runner opens her hand following her after a few strides, by which time the first runner supposed to be caught up and able to hand over off the baton. In the middle-distance relays or longer, the runners start by jogging while looking back at the incoming runner and holding out a hand for the baton.

A relay race team may be disqualified from a relay for the following reason...
1. Improperly overtaking the another competitor
2. By preventing another competitor from passing
3. Willfully impeding, inappropriately crossing the course, or in any other way
4. Or by interfering with the another competitor
5. Making the two false starts (or in some cases only one)
6. Making an inappropriate or improper baton exchange

Saturday, October 27, 2007

An overview about the Traffic light

A traffic light or traffic signal is a signaling machine positioned at a road intersection or pedestrian crossing to point out when it is secure or safe to drive, ride or walk, using a worldwide color code.

The Traffic lights for common vehicles or pedestrians for all time have two main lights, a red one that means stop and a green one that means go. Generally, the red light contains some orange in its hue, and the green light has some blue, to give some support for people with red-green color blindness. In nearly all countries there is also a yellow (or amber) light, which when on and not flashing means halt if able to do so securely. In some systems, flashing amber means that a motorist can go ahead with care if the road is clear, giving way to pedestrians and to other road vehicles that possibly will have priority. A flashing red basically means the same as a regular stop sign. There can be added lights (generally a green arrow or "filter") to approve turns (called a lead light in the U.S., because it is generally leading the main green light). Traffic lights for particular vehicles (like buses or trams) may perhaps use other systems, like vertical vs. horizontal bars of white light.

Thursday, October 18, 2007

Different Glass Colors information

The Metallic additives in the glass mix can make various colors. Here cobalt has been added to produce a bluish colored attractive glass Metals and metal oxides are added to glass during its manufacture to change its color. Manganese can be added in small amounts to take away the green tint lent by iron, or in higher concentrations to provide glass an amethyst color.

Similar to manganese, selenium can be used in small concentrations to decolorize the glass, or the higher concentrations to impart a reddish color. Small concentrations of the cobalt (0.025 to 0.1%) will yield blue glass. The Tin oxide with antimony and arsenic oxides make an opaque white glass, first used in Venice to make imitation porcelain. 2 to 3% of the copper oxide produces a turquoise color. Pure metallic copper produces an extremely dark red, opaque glass, which is at times used as a substitute for gold ruby glass. Nickel, depending on the concentration, will produces blue, or violet, or even black glass too.

Adding titanium makes the yellowish-brown glass. Metallic gold, in very small concentrations (around 0.001%), will makes a rich ruby-colored glass, while lower concentrations will makes a less intense red, often marketed as "cranberry". Uranium (0.1 to 2%) can be added to give glass a glowing yellow or green color. Uranium glass is normally not radioactive enough to be dangerous, but if ground into a powder, for example by polishing with sandpaper, and inhaled, it can be carcinogenic. Silver compounds (especially silver nitrate) can make a variety of colors from orange-red to yellow. The way the glass is heated and cooled can notably affect the colors shaped by these compounds. The chemistry concerned is complex and not well understood.

Thursday, October 11, 2007

The real facts about Earth

Earth is the third planet from the Sun and the fifth largest of the planet. Earth is the only planet whose English name does not originate from Greek/Roman mythology. The name derives from Old English and Germanic.

Earth, for sure, can be studied without the aid of spacecraft. However it was not until the twentieth century that we had maps of the complete planet. Pictures of the planet taken from space are of significant importance; for instance, they are a huge help in weather prediction and especially in tracking and predicting hurricanes. And they are amazingly beautiful. The Earth's magnetic field and its relations with the solar wind also generate the Van Allen emission belts, a pair of doughnut shaped rings of ionized gas (or plasma) trapped in orbit just about the Earth. The outer belt stretches from 19,000 km in altitude to 41,000 km; the inner belt lies involving 13,000 km and 7,600 km in altitude.

The Earth's surface is extremely young. In the relatively short (by astronomical standards) time of 500,000,000 years or so erosion and tectonic processes destroy and remake most of the Earth's surface and thus eliminate almost all traces of earlier geologic surface history (such as impact craters). Thus the very early on history of the Earth has mostly been erased. The Earth is 4.5 to 4.6 billion years old, but the oldest recognized rocks are about 4 billion years old and rocks older than 3 billion years are rare. The oldest fossils of existing organisms are less than 3.9 billion years old. There is no evidence of the critical period when life was first getting in progress.

The Earth's atmosphere is 77% nitrogen, 21% oxygen, with draws of argon, carbon dioxide and water. There was perhaps a very much larger amount of carbon dioxide in the Earth's atmosphere when the Earth was first created, but it has since been nearly all incorporated into carbonate rocks and to a smaller extent dissolved into the oceans and consumed by living plants. Plate tectonics and biological processes now keep a repeated flow of carbon dioxide from the atmosphere to these various "sinks" and back over again. The small amount of carbon dioxide occupant in the atmosphere at any time is very important to the maintenance of the Earth's surface temperature through the greenhouse effect. The greenhouse effect raises the average surface temperature regarding 35 degrees C above what it would if not be (from a frigid -21 C to a comfortable +14 C); without it the oceans would freeze and life as we know it would be impossible.

Thursday, September 27, 2007

A Cure for Cancer

Over twenty special types of cancer have been established to exist in the world today. Cancer kills over thousands of people in the united state all the year. The news constantly contains reports of the many types of ways a human can get cancer. The main reasons one can get cancer by smoking, dietary factors, exercise, occupation, genetics etc, Out of that the main cause of cancer obesity and smoking are the leading causes. Cancer affects a person when abnormal cells within a tissue of a certain part of the human body carry on dividing out of control. Normal cells stop reproduce after about fifty cycles. Since many types of cancer live, anyone at any age has a risk of being diagnose.
In an effort for people to speed up the process of finding a cure for cancer, people came up with urban mythology and myths to preventing or getting rid of cancer. In the spring of 1999 many people begin to believe that antiperspirants could cause cancer. The Canola oil, which is said to by scientists to be one of the healthier food oils, was also once supposed to be toxic and cancer causing.

Monday, September 10, 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.

Monday, September 03, 2007

Flak jacket

A flak jacket or flak vest is a type of caring clothing. Today it frequently refers to bulletproof vests, particularly Type III and on top of which have added steel, titanium, ceramic or polyethylene saucers which can resist high-powered rounds such as from rifles.

Monday, August 27, 2007

Currency

A currency is a component of exchange, facilitating the transfer of supplies and services. It is a form of money, where money is an capable medium of exchange, and it is also considered by a number of people as a store of value, created through a claim to its central bank assets. A currency zone is a country in which a specific currency is the main medium of exchange. To facilitate trade between currency zones, there are exchange price at which currencies can be exchanged beside each other. Currencies can be classified as also floating currencies or fixed currencies based on their exchange rate regime.

In general usage, currency at times refers to only paper money, as in "coins and currency", but this is confusing. Coins and paper money are both forms of currency.In most cases, each country has control over the supply and manufacture of its own currency.

Monday, August 20, 2007

Count wheel

Count wheel striking: the unequally spaced notches in the external count wheel on the right side of this tower clock movement regulate the number of times the bell is struck. Two technologies have been devised by clockmakers to enable striking clocks to correctly count out the hours. The earlier technology is called count wheel striking. This uses a wheel that contains notches on its side, spaced by unequal, increasing arc segments. This count wheel governs the rotation of the striking train. When the striking train is released by the timekeeping train, a lever is lifted from a notch on the count wheel; the uneven notches allow the striking train to move only far enough to sound the correct number of times, after which the lever falls back into thatch and stops the striking train from turning further.

Monday, August 13, 2007

Harrington jacket

A Harrington jacket is a type of tiny, lightweight jacket, made of cotton, polyester, wool or suede — generally with a tartan or check-patterned lining.

The initial Harrington-style jackets were made by British clothing company, Baracuta, in the 1930s; the company is still making the same model, the G9. This style of jacket got the nickname Harrington because it was worn by the personality Rodney Harrington (played by Ryan O'Neal) in the 1960s television program Peyton Place; John Simmons, who opened 'The Ivy Shop', Richmond, London, claims to have coined this explanation.

Tuesday, August 07, 2007

Toothbrush

The toothbrush is a device used to clean teeth, consisting of a tiny brush on a handle. Toothpaste, often containing fluoride, is commonly added to a toothbrush to assist in cleaning. Toothbrushes are offered with changeable textures of bristles, and come in many different sizes and forms. Most dentists recommend using a toothbrush labeled "Soft", since firmer bristled toothbrushes can harm tooth enamel and irritate gums as indicated by the American Dental Association. Toothbrushes are often ready from synthetic fibers, although natural toothbrushes are also known in many parts of the world.

Tuesday, July 31, 2007

Electrostatic

A thin, electrostatic ally charged diaphragm, is suspended between two perforated metal plates. The electrical sound signal is applied to the electrodes creating an electrical field; depending on the polarity of this field, the membrane is drawn towards one of the plates. Air is forced through the perforations; combined with a continuously changing electrical signal oscillating the membrane, a sound wave is generated.

Sunday, July 22, 2007

Web portal

A Web portal is a site that functions as a point of admittance to information on the World Wide Web. Portals present information from diverse sources in a united way. Popular portals are MSN, Yahoo, and AOL. Aside from the search engine standard, web portals offer other services such as news, stock prices, infotainment and various other features. Portals provide a way for enterprises to provide a steady look and feel with access control and procedures for multiple applications, which otherwise would have been different entities altogether.

Friday, July 13, 2007

Pollarding

Pollarding is a woodland management method of hopeful lateral branches by cutting off a tree stem or minor branches two metres or so above ground level. The tree is given a year to regrow, after the first cutting, but once begun, pollarding requires annual maintenance by pruning. This will ultimately result in somewhat expanded (or swollen) nodes topping the tree trunk with multiple new side and top shoots growing from it.A tree that has been pollarded is known as a pollard. A tree which has not been pollarded is called a maiden or maiden tree; which also refers to the fact that pollarding is usually first undertaken when the tree is quite young. Pollarding older trees typically result in the death of the tree. Pollarding is sometimes abused in attempts to curb the growth of older or taller trees. However, when performed properly it is useful in the practice of arboriculture for tree management.

Sunday, July 08, 2007

Deadheading

Deadheading is the act of removing spent flowers or flowerheads for aesthetics, to prolong bloom for up to several weeks or endorse rebloom, or to put off seeding.Deadheading is beneficial to most herbaceous ornamental plants. It can get better overall look of a plant, give a fresh new look to an otherwise finished or even distracting item, and can promote vegetative and root increase rather than seed production and help retain the plant's healthy appearance.

Sunday, July 01, 2007

Bean

Bean is a common name for large plant seeds of several genera of Fabaceae used for food or feed. They are also known as legumes.The term Bean at first referred to the seed of the broad bean, but was later broadened to include members of the genus Phaseolus such as the common bean or haricot and the runner bean and the related genus Vigna. The term is now applied in a general way to many other related plants such as soybeans, peas, lentils, kidney beans, vetches and lupins.Bean can be used as a near synonym of pulse, an edible legume, though the term "pulses" is usually reserved for leguminous crops harvested for their dry grain. Pulses frequently exclude crops mainly used for oil extraction (like soybean and peanut) or those used exclusively for sowing purposes (clover and alfalfa). Leguminous crops harvested green for food, such as snap beans, green peas etc, are classified as vegetable crops.In English usage 'beans' sometimes also refer to seeds or other organs of non leguminosae which bear a resemblance to the vegetable, for example coffee beans, castor beans and cocoa beans ,and vanilla beans .

Tuesday, June 26, 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.

Saturday, June 23, 2007

Butterfly Koi

Butterfly Koi, Longfin Koi, or Dragon Carp are a type of ornamental fish notable for their elongated finnage. The fish are a breed of the common carp, Cyprinus carpio, (which includes numerous wild carp races as well as domesticated koi ("Nishikigoi").

Butterfly Koi originated in the mid 20th century as a result of an effort to increase the hardiness of traditional koi. Japanese breeders interbred wild Indonesian Longfin river carp with traditional koi. The resulting fish had longer fins, long barbells, pompom nostrils, and were hardier than koi. These were known in Japan as “onagaoi” or "hire naga koi", or translated in English “long tail koi”. Randy LeFever, the son of Wyatt LeFever, a noted breeder of koi, is credited with suggesting they looked like butterflies, a trait for which the breed is named. They are also sometimes referred to as Dragon Koi.

Sunday, June 17, 2007

Blue rose

Since roses lack a gene to create delphinidin, the primary plant pigment that produces true blue flowers, blue roses were usually created by dyeing white roses. So-called "blue roses" have been breed by conventional hybridization methods, but the results, such as "Blue Moon" are more precisely described as lilac in color. However, after 13 years of joint research by an Australian company Florigene, and Japanese company Suntory, a blue rose was formed in 2004 by genetic engineering. The delphinidin gene was cloned from the petunia and inserted into a mauve-blend rose, the Old Garden Rose 'Cardinal de Richelieu.' (a Rosa gallica) However, since the pigment cyanidin was still present, the rose was more dark burgundy than true blue. Further work on the rose using RNAi technology to depress the production of cyanidin produced a very dark mauve plant, with only trace amounts of cyanidin.
Blue roses conventionally signify mystery or attaining the impossible. They are supposed to be able to grant the owner youth or grant wishes. This symbolism derives from the rose's meaning in the language of plants common in Victorian times.

Monday, June 11, 2007

Star

A star is an enormous, luminous ball of plasma. Stars cluster together to form galaxies, and they dominate the visible universe. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth, together with daylight. Other stars are visible in the night sky, when they are not outshone by the Sun. A star shines because nuclear fusion in its core releases energy which traverses the stars internal and then radiates into outer space. Almost all elements heavier than hydrogen and helium were produced inside the cores of stars.

Astronomers can establish the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity and motion through space. The total mass of a star is the principal determinant in its development and eventual fate. Other individuality of a star that is determined by its evolutionary history includes the diameter, rotation, movement and temperature. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung-Russell diagram (H-R diagram), allows the current age and evolutionary state of a particular star to be determined.

Wednesday, June 06, 2007

Shrimp fishery

A shrimp fishery is a fishery directed toward harvesting either shrimp or prawns. Fisheries do not usually differentiate between the two taxa, and the terms are used interchangeably. This article therefore refers to the catching of either shrimp or prawns.
A number of the larger species, including the Atlantic white shrimp (Penaeus setiferus), are caught commercially and used for food. Recipes utilizing shrimp form part of the cuisine of many cultures: examples include jambalaya, okonomiyaki, poon choi, bagoong, Kerala and scampi.Preparing shrimp for consumption usually involves removing the shell, tail, and "sand vein". As with other seafood, shrimp is high in calcium, protein and low in food energy.Shrimp and prawns are versatile ingredients, and are often used as an accompaniment to fried rice. Common methods of preparation comprise baking, boiling and frying. As stated in the movie Forrest Gump

Sunday, May 27, 2007

The key benefit of RAM

The key benefit of RAM over types of storage which need physical movement is that retrieval times are short and consistent. Short because no physical movement is required, and consistent because the time taken to retrieve a piece of data does not depend on its current distance from a physical head; it requires practically the equal amount of time to access any piece of data stored in a RAM chip.

Because of this speed and consistency, RAM is used as 'main memory' or primary storage: the working area used for loading, displaying and manipulate applications and data. In most personal computers, the RAM is not an essential part of the motherboard or CPU—it comes in the easily upgraded form of modules called memory sticks or RAM sticks about the size of a few sticks of chewing gum, which can be quickly detached and replaced when they become damaged or too small for current purposes. A smaller amount of random-access memory is also integrated with the CPU, but this is usually referred to as "cache" memory, rather than RAM.

The disadvantage of RAM over physically moving media is cost and the loss of data when power is turned off. For these reasons, almost all PCs have disc storage as "secondary storage". Small PDAs and music players (up to 8 GiB in Jan 2007) may allot with disks, but rely on flash memory, to retain data between sessions of use.

Friday, May 18, 2007

Moore machine

Moore model control of a winch door in the theory of computation, a Moore machine is a finite state automaton where the outputs are determined by the current state alone. The state diagram for a Moore machine will include an output signal for each state. Compare with a Mealy machine, which maps transitions in the machine to outputs.

The name Moore machine comes from that of its supporter, Edward F. Moore, a state-machine pioneer who wrote "Gedanken-experiments on Sequential Machines".

Most digital electronic systems are designed as clocked sequential systems. Clocked sequential systems are a limited form of Moore machine where the state changes only when the global clock signal changes. Typically the current state is stored in flip-flops, and a global clock signal is connected to the "clock" input of the flip-flops. Clocked chronological systems are one way to solve met stability problems.

A typical electronic Moore machine includes a combinatorial logic chain to decode the current state into the outputs. The instant the current state changes, those changes ripple through that chain, and almost instantaneously the outputs change. There are design techniques to ensure that no glitches occur on the outputs during that brief period while those changes are rippling through the chain, but most systems are designed so that glitches during that brief transition time are ignored or are irrelevant. The outputs then stay the same indefinitely, until the Moore machine changes state again.

Sunday, May 13, 2007

Sunglass

Sunglasses are a kind of visual correction aid, variously termed spectacles or glasses, which feature lenses that are colored 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 kinds 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.

Wednesday, May 09, 2007

Vehicle

Vehicles are non-living means of moving. They are most often man-made, although some other means of moving which are not made by man can also be called vehicles; examples include icebergs and floating tree trunks. Vehicles may be propelled by animals, e.g. a chariot or an ox-cart. However, animals on their own, though used as a means of transportation, are not called vehicles. This includes humans carrying another human, for example a child or a disabled person. Vehicles that do not travel on land are often called crafts, such as watercraft, sail craft, aircraft, hovercraft and spacecraft most land vehicles have wheels. Please see the wheel article for examples of vehicles with and without wheels. Movement without the help of a vehicle or an animal is called locomotion. The word vehicle itself comes from the Latin vehicular.

Tuesday, May 01, 2007

History of Postage Stamp

The world's initial stamp was the Penny Black the adhesive postage stamp and the uniform postage rate were devised in Great Britain by James Chalmers around 1834. The same ideas were brought forward by Lovrenc Kosir, a Slovenian postal clerk at the Viennese court in 1835, but did not meet a positive reply. Later, the concept of the adhesive postage stamp was published by Rowland Hill, in Postal Reform: its Importance and Tractability in 1837. In it he argued that it would be better for the sender to pay the cost of release, rather than the addressee who could refuse the letter if they could not or did not want to pay, as sometimes happened at the time. He also argued for a uniform rate of one penny per letter, no matter where its destination. Accounting costs for the government would thus be cut; postage would no longer be charged according to how far a letter had traveled, which required each letter to have an individual entry in the Royal Mail's accounts. Chalmers' ideas were lastly 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 pictorial envelopes or wrappers: one valued at a penny and one valued at two pence.

Three months shortly the first prepaid-postage stamp, known as the Penny Black was issued with the profile of Queen Victoria printed on it. Because the United Kingdom issued the first stamps, the Universal Postal Union grants it an exception from its rule that the recognition of the issuing country must appear on a stamp in Roman script for use in international mails. Previous to joining the U.P.U. many countries did not do this; there are very few violations of the rule since this time, though one example is the U.S. Pilgrim Tercentenary series, on which the country designation was involuntarily excluded. Because of this the numerous early issues of China and Japan often confound new collectors unfamiliar with Oriental scripts. A stamp must also show a face value in the issuing country's currency. Some countries have issued stamp with a letter of the alphabet or designation such as "First class" for a face value. Because of the U.P.U. rules their use is constrained to domestic mail, but breach of this rule is often tolerated. Exceptions to this are the British "E" stamp and the South African "International Letter Rate" stamp.

Friday, April 27, 2007

Tourism

Tourism is travel for predominantly leisure or relaxation purposes, and also refers to the prerequisite of services in support of this act. Tourists are people who ,travel to and stay in places outside their common environment for not more than one consecutive year for leisure, business and other purposes not related to work out of an activity remunerated from within the place visited.

Tourism has become an enormously popular, global activity. As a service industry, tourism has frequent tangible and intangible elements. Major tangible elements include transportation, accommodation, and other apparatus of a hospitality industry. Major intangible elements relate to the purpose or inspiration for becoming a tourist, such as rest, relaxation, the opportunity to meet new people and experience other cultures, or simply to do something different and have an adventure.

Tourism is crucial for many countries, due to the income generated by the expenditure of goods and services by tourists, the taxes levied on businesses in the tourism industry, and the prospect for employment and economic advancement by working in the industry.

Tuesday, April 24, 2007

Artificial intelligence (Collective and non-human intelligence)

Some thinkers have explored the idea of combined intelligence, arising from the harmonization of many people. A battleship, for instance, cannot be operated by a single person's knowledge, actions and intelligence; it takes a equivalent and interacting crew. Similarly, the interesting behaviors of a bee colony are not exhibited in the aptitude and actions of any single bee, but rather manifest in the performance of the hive. These ideas are explored as a basis for human thought, with applications for artificial intelligence, by MIT AI pioneers Norbert Wiener and Marvin Musky. Artificial intelligence has emerged from Computer science as a area of expertise which seeks to make computers act in gradually more intelligent ways, and provides insights into human thought processes.

When bearing in mind animal intelligence, a more general definition of intelligence might be applied: the "ability to adapt efficiently to the environment, either by making a change in oneself or by changing the surroundings or finding a new one". Many people have also speculated about the possibility of outer space intelligence.

Wednesday, April 18, 2007

Multitrack recording

Multitrack recording is a method of sound recording that allows for the recording of multiple sound sources, whether at the same time or at different times. This is probably the most common technique of recording popular music: Musicians or singers can be recorded independently, then these performances can be edited together to create a cohesive result. It is also called 'multitracking' or just 'tracking' for short.Multitrack recording devices are available with varying capacities. When recording a segment of audio, which is also known as a track, audio engineers and musicians may select which track or tracks on the device will be used.

Monday, April 09, 2007

Traffic calming

Traffic reassuring is a set of strategies used by urban planners and traffic engineers which aims to slow down traffic and improve safety for pedestrians and bicyclists, although some of these features can also be dangerous to cyclists. It is now relatively common in Europe, especially Northern Europe; less so in North America.
Traffic calming has traditionally been justified on the grounds of pedestrian security and reduction of noise and local air pollution which are side effects of the traffic. However, it has become increasingly apparent that streets have many social and recreational functions which are severely impaired by fast car traffic. For example, residents of streets with light traffic had, on average, three more friends and twice as many acquaintances as the people on streets with heavy traffic which were otherwise similar in dimensions, income, etc. For much of the twentieth century, streets were designed by engineers who were charged only with ensuring traffic flow and not with fostering the other functions of streets. The rationale for traffic calming is now broadening to include designing for these functions.
Displaced traffic is not fully pushed onto other routes, as some travelers may begin to walk or use other modes such as public transit and bicycles to get where they are going. Still, in most cases the affected motorists have few alternatives aside from either navigating the newly erected obstacles or finding a more palatable route. This happens because high traffic tends to be generated by motorists passing through the area and not by the local residents.

It should be noted the some of these measures have a tendency to irritate and annoy drivers rather than calm them and others can actually increase traffic throughput. Some drivers who slow down at calming points, however, accelerate and speed after passing them in order to "catch up for lost time". For this reason, more advanced methods integrated into the design of the street, which make slower speeds seem more natural to drivers and less of an artificial imposition, are now preferred - the goal is to slow down the driver through psychological, at least partly subconscious means instead of simply forcing him to do so.
One major side effect of traffic reassuring is the impedance to emergency services. A police car can easily navigate most traffic reassuring measures. The same cannot be said for fire trucks and ambulances, however. They often have to slow down to safely cross speed bumps or chicanes. In some locales, the law prohibits traffic calming measures along the routes used by the urgent situation services.
There are 3 "E"'s that traffic engineers refer to when discussing traffic reassuring: engineering, education, and enforcement. Because neighborhood traffic management studies have shown that often it is the residents themselves that are largely contributing to the perceived speeding problem within the neighborhood, it is strained that the most effective traffic calming plans will entail all three components, and that engineering measures alone will not produce satisfactory results.

Monday, April 02, 2007

Goshawk

The Goshawk is a average large bird of prey in the family Accipitridae which also includes many other diurnal raptors such as eagles, buzzards and harriers.

It is a extensive species throughout the moderate parts of the northern hemisphere. In North America it is named as the Northern Goshawk. It is mostly resident, but birds from colder regions of north Asia and Canada wander south for the winter.


Goshawk in flight this kind nests in trees, building a new nest each year. It hunts birds and mammals in woodland, relying on surprise as it flies from a perch or hedge-hops to cruel circle its prey unaware. Animals as large as hares and Pheasant are taken. Its call is a ferocious shriek. Many older goshawks refuse to attack hares, if it was previously acutely kicked by a hare which it tried to catch.


In Eurasia, the male is confusable with a female Sparrow hawk, but is larger, much bulkier and has comparatively longer wings. In spring, he has a stunning roller-coaster display, and this is the best time to see this enigmatic forest bird.

Thursday, March 29, 2007

Major ice ages

There have been at least four main ice ages in the Earth's past.

The earliest hypothesized ice age is believed to have occurred around 2.7 to 2.3 billion years ago through the early Proterozoic Age.

Main article: Snowball Earth.

The most primitive well-documented ice age, and probably the most harsh of the last 1 billion years, occurred from 800 to 600 million years ago and it has been suggested that it formed a Snowball Earth in which permanent sea ice extensive to or very near the equator. It has been not compulsory that the end of this ice age was responsible for the subsequent Cambrian Explosion, though this theory is current and contentious.

The timing of ice ages all through geologic history is in part prohibited by the position of the continental plates on the surface of the Earth. When landmasses are determined near the Polar Regions, there is an increased chance for snow and ice to build up. Small changes in solar energy can tip the balance between summers in which the winter snow mass completely melts and summers in which the winter snow persists until the following winter. Due to the positions of Greenland, Antarctica, and the northern portions of Europe, Asia, and North America in Polar Regions, the Earth today is considered prone to ice age glaciations.

Proof for ice ages comes in a variety of forms, including rock scouring and scratching, glacial moraines, drumlins, valley cutting, and the deposition of till or tillites and glacial erratic. Successive glaciations be inclined to distort and erase the geological proof, making it difficult to interpret. It took some time for the current theory to be worked out. Analyses of ice cores and ocean sediment cores unmistakably show the record of glacial and interglacial over the past few million years.

Sunday, March 25, 2007

Banksia

Banksia is a genus of around 80 species in the plant family Proteaceae. They are native to Australia, occurring in all but the most arid areas. Easily recognized by their characteristic flower spikes and fruiting "cones", Banksia are a well-known Australian wildflower and a popular garden plant. They grow in forms varying from prostrate woody shrubs to trees up to 25 metres tall. They are normally known as Banksias or Australian Honeysuckle Trees.
Banksias grow as trees or woody shrubs. The largest trees, the Coast Banksia, B. integrifolia, and the River Banksia, B. seminuda, often grow over 15 metres tall, and may be up to 25 metres tall. Banksia species that grow as shrubs are typically erect, but there are some species that are prostrate, with branches that grow on or below the soil.
The leaves of Banksia vary greatly among species. Sizes vary from the narrow, 1–1½ centimetre long leaves of the Heath-leaved Banksia, B. ericifolia, to the very large leaves of the Bull Banksia, B. grandis, which may be up to 45 centimetres long. The leaves of most species have serrated edges, but a few, such as B. integrifolia, do not. Leaves are usually arranged along the branches in irregular spirals, but in some species they are crowded together in whorls.
Banksias are most without difficulty recognised by their characteristic flower spike, and the woody fruiting structures that appear after flowering. The flower spike consists of a central woody axis with a furry coating; it is usually held erect, but hangs down in a few species. This axis is enclosed in tightly-packed pairs of flowers, which are attached to the axis at right angles. A single flower spike may have over a thousand flowers.

Tuesday, March 20, 2007

Studio cameras

Most studio cameras stand on the floor, regularly with pneumatic or hydraulic mechanisms to adjust the height, and are typically on wheels. Any video camera when used along with other video cameras in a studio setup is controlled by a device well-known as CCU (camera control unit), to which they are linked via a Triax or Multicore cable. The camera control unit along with other equipments is installed in the production control room often documented as Gallery of the television studio. When used outside a studio, they are often on tracks. Initial models used analog technology, but digital models are becoming more common. Some studio cameras are light and small enough to be taken off the pedestal and used on a cameraman's shoulder, but they still have no recorder of their own and are cable-bound.

Wednesday, March 14, 2007

Haze

Haze is an atmospheric occurrence where dust, smoke and other pollutant particles obscure the usual clarity of the sky. It occurs when dust and smoke particles build up in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a generally low-hanging shroud that impairs visibility and may become a respiratory health threat. Dense haze caused by industrial pollution is also known as smog.
Sources for haze particles include farming (ploughing in dry weather), traffic, industry, forest fires and peat field fire.
Seen from afar (e.g. approaching airplane), haze is brownish, while mist is more blueish-grey. While haze is formed in somewhat dryish air, in more humid air mist is formed, and the haze particles can even act as condensation nuclei for the mist droplets.

Friday, March 09, 2007

Mirror

A mirror is an object whose surface has good specular reflection; that is, it is smooth sufficient to form an image. The most common type of mirror is the plane mirror, which has a flat surface. Curved mirrors are also used, to produce magnified or demagnified images or focus light.
The most common use of mirrors is for personal hygiene. However, mirrors are also used in scientific apparatus such as telescopes and lasers, as well as industrial machinery. Most mirrors are designed for visible light, however, mirrors intended for other wavelengths of electromagnetic radiation are also used, particularly in optical instruments.

Monday, March 05, 2007

The Leaning Tower of Pisa

The Leaning Tower of Pisa (Italian: Torre pendente di Pisa) or simply The Tower of Pisa (La Torre di Pisa) is the campanile, or self-supporting bell tower, of the cathedral of the Italian city of Pisa. It is situated behind the Cathedral and it is the third structure in Pisa's Campo dei Miracoli (field of Miracles).
Although planned to stand vertically, the tower began leaning to the southeast soon after the onset of construction in 1173 due to a poorly laid foundation and loose substrate that has permitted the foundation to shift.
The height of the tower is 55.86 m (183.27 ft) from the ground on the lowest side and 56.70 m (186.02 ft) on the highest side. The width of the walls at the base is 4.09 m (13.42 ft) and at the top 2.48 m (8.14 ft). Its weight is estimated at 14,500 tonnes. The tower has 294 steps.
The Tower of Pisa was a work of art, performed in three stages over a period of about 174 years. Construction of the first floor of the white marble campanile began on August 9, 1173, a period of military success and prosperity. This first floor is enclosed by pillars with classical capitals, leaning against blind arches. Today, it is still unscarred from centuries of weather and age.

Thursday, March 01, 2007

Mobile

A mobile or cellular telephone is a long-range, transferable electronic device for personal telecommunications over long distances. In addition to the standard voice function of a telephone, current mobile phones can support many additional services such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video. Most current mobile phones attach to a cellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception are satellite phones).
Mobile phones are not distinct from cordless telephones, which usually operate only within a limited range of a specific base station. In principle, the term mobile phone includes such devices as satellite phones and pre-cellular mobile phones such as those operating via MTS which do not have a cellular network, whereas the linked term cell(ular) phone does not. In practice, the two terms are used almost interchangeably.

Friday, February 23, 2007

Manhattan

Manhattan refers to both the Island of Manhattan and encompasses most of the Borough of Manhattan, one of the five boroughs of New York City. The viable, financial, and cultural center of the city, Manhattan has many famous landmarks, tourist attractions, museums and universities. It is also home to the control center of the United Nations and the seat of city government.
The borough of Manhattan is coterminous with New York County, which is also the most densely populated county in the United States. Postal addresses within the borough are typically chosen as "New York, NY."
Manhattan has the biggest central business district in the United States and is the site of most of the city's corporate headquarters and the New York Stock Exchange. Although its population is third biggest of the five boroughs, after Brooklyn and Queens, and it is geographically the smallest, Manhattan is the borough that many visitors most personally associate with New York City.

Monday, February 19, 2007

Indian culture

Indian culture can be classified into many different form which are existent in their totality throughout the territory of India. The culture of India has been influenced by different religions and customs of the world, which resulted in the mingling of religious values, folk idioms and art forms. While the religious influence is relatively evident in the "classical" Indian culture mostly found in smaller towns and villages, the urban India is now widely influenced globalization.
The cultural policy of the Government of India has three most important objectives. One of them is to preserve the cultural heritage of India; to repeat Indian art consciousness amongst countrymen and to promote high standards in innovative and performing arts fields

Tuesday, February 13, 2007

Eye movement

Animals with compound eyes have a wide field of vision, allowing them to look in many directions. To see more, they have to move about their entire head or even body.The visual system in the brain is too slow to process that information if the images are slipping across the retina at more than a few degrees per second. Thus, for humans to be able to see while moving, the brain must compensate for the motion of the head by turning the eyes. Another complication for vision in frontal-eyed animals is the development of a small area of the retina with a very high visual sharpness. This area is called the fovea, and covers about 2 degrees of visual angle in people. To get a clear view of the world, the brain must turn the eyes so that the image of the object of regard falls on the fovea. Eye movements are thus very essential for visual perception, and any failure to make them correctly can lead to serious visual disabilities.Having two eyes is an added complication, because the brain must point both of them accurately enough that the object of regard falls on corresponding points of the two retinas; otherwise, double vision would occur. The movements of different body parts are controlled by striated muscles acting around joints. The movements of the eye are no exception, but they have special advantages not shared by skeletal muscles and joints, and so are considerably different.

Tuesday, February 06, 2007

Software

Software basically is the distinct image or representation of physical or material position that constitute configuration to or functional identity of a machine, usually a computer. As a substance of memory, software in principle can be changed without the alteration to the static paradigm of the hardware thus without the remanufacturing thereof. generally software is of an algorithmic form which translates into being to a progression of machine instructions. Some software, however, is of a relational form which translate into being the map of a recognition network.
Software is a program that enables a computer to achieve a specific task, as contrasting to the physical components of the system (hardware). This include application software such as a word processor, which enables a user to achieve a task, and system software such as an operating system, which enables other software to run suitably, by interfacing with hardware and with other software.
The term "software" was first used in this intellect by John W. Tukey in 1957. In computer science and software engineering, computer software is all computer program. The perception of reading different sequences of instructions into the memory of a apparatus to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the source for most modern software was first projected by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungs problem.
TypesPractical computer systems partition software into three major classes: system software, programming software and application software, although the division is subjective, and often blurred.
* System software is one of the major class helps run the computer hardware and computer system. It includes working systems, device drivers, analytical tools, servers, windowing systems, utilities and more. The intention of systems software is to protect the applications programmer as much as possible from the details of theexacting computer complex being use, especially memory and other hardware features, and such accessory procedure as communications, printers, readers, displays, keyboards, etc.
* Programming software usually provide tools to support a programmer in writing computer programs and software with different programming languages in a more suitable way.The tools comprise text editors, compilers, interpreters, linkers, debuggers, and so on, An incorporated development environment (IDE) merge those tools into a software bundle, and a programmer may not need to type various command for compiling, interpreter, debugging, tracing, and etc., because the IDE typically has an sophisticated graphical user interface, or GUI.
* Application software allows humans to complete one or more explicit (non-computer related) tasks. typical applications include manufacturingautomation, business software, educational software, medical software, databases and computer games. Businesses are possibly the biggest users of application software, but approximately every field of human action now uses some form of application software. It is used tocomputerizeall sorts of functions.

Friday, January 26, 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.

Friday, January 12, 2007

Historical background of real estate

History of the wordThe word 'real' in the context of 'real estate' is not the opposite of 'unreal' but is in fact derived from the same source as the word 'royal'. An illustration of this is found today in the name of soccer team Real Madrid, meaning Royal Madrid.
Interpretations varyWhen the word 'real' was originally used in conjunction with the word 'property', it had the literal meaning under common law of royal property. Translated for application in the United Kingdom today, this term refers to Crown property (since the real property rights of the British Royal Family were amended under the Act of Settlement.) However, since Scotland is not a common law jurisdiction, its strict interpretation today differs from that of its application to England and Wales and other localities where common law does apply.
Within international jurisdictions, such as those states of the United States where common law is applicable (and not all states are common law states), the term refers to both the land owned by the federal government; land owned by the state; land owned by Indian tribes (where applicable), and the land owned by individuals and companies within that state. This is in contrast to all other property in such states which is then deemed to be 'personal' property.
Even when common law is the governing law, interpretations of real property under common law vary according to the jurisdiction.

DefinitionsAn important area of real immovable property are the definitions of estates in land. These are various interests that may limit the ownership rights one has over the land. The most common and perhaps most absolute type of estate is the fee simple which signifies that the owner has the right to dispose of the property as she/he sees fit. Other estates include the life estate where the owner's rights to the property cease at their death and fee tail estates where the property at the time of death passes to the heirs of the body (i.e. children, grandchildren, descendants) of the owner of the estate before he died.