Water abstraction


Water abstraction, or water extraction, is the process of taking water from any source, either temporarily or permanently. Most water is used for irrigation or treatment to produce drinking water.Depending on the environmental legislation in the relevant country, controls may be located on abstraction to limit the amount of water that can be removed. Over abstraction can lead to rivers drying up or the level of groundwater aquifers reducing unacceptably.The science of hydrogeology is used to assess safe abstraction levels.

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.

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.

American carrom

American carrom is an alternative on carrom derived in America by missionaries to the East, around 1890. Believing that the game required restructuring for Western tastes, a Sunday school teacher named Henry Haskell altered the game. Much of the game is the same, but the striker's weight is reduced and the carrom men are smaller. Generally, instead of disks of solid wood, ivory, or acrylic, carrom men are rings, originally of wood but today commercially made of light plastic. In addition, as an alternative to using the fingers to flick the striker,American carrom uses miniature cue sticks. American carrom boards also have pockets built into the corners, rather than circular holes in the board, to make pocketing easier. While traditionally made boards vary widely, current commercially-produced American carrom boards are 28 inches square, are printed with checkerboard and backgammon patterns, among others, and are sold with checkers, chess pieces, skittles, etc., to allow other games to be played on the same board. Often, these boards are also built to play crokinole.

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.

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.

Hard Disk

A hard disk is a non-volatile storage device which stores digitally programmed data on rapidly rotating platters with magnetic surfaces. Strictly speaking, "drive" refers to a device that drives (removable) media, such as a tape drive or (floppy) disk drive, although a hard disk contains fixed (non-removable) media. Recently the hard disk has become more commonly known as the "hard drive".

Hard disks were initially developed for use with computers. In the 21st century, applications for hard disks have extended beyond computers to consist of digital video recorders, digital audio players, personal digital assistants, digital cameras, and video game consoles. In 2005 the first mobile phones to contain hard disks were introduced by Samsung Group and Nokia. The need for large-scale, reliable storage, independent of a particular device, led to the beginning of configurations such as RAID, hardware such as network attached storage (NAS) devices, and systems such as storage area networks (SANs) for efficient access to large volumes of data.

History of Personal computer

An near the beginning use of the term appeared in a November 3, 1962, New York Times
article exposure John W. Mauchly's vision of expectations computing spoken to a conference of the American Institute of Industrial Engineers that previous day. Mauchly told the gathering, "There is no reason to suppose the average boy or girl cannot be master of a personal computer."

The initial computers that can be called 'personal' were the first Non -main frame computers, the LINC and the PDP-8. By today's standards they were big, expensive, and had small magnetic core memories.

However, they were small and cheap for individual laboratories and research projects to use, freeing them from the consignment dispensation and establishment of the typical industrial or university computing center. In addition, they were reasonably interactive and soon had their own operating systems. Finally, this category became known as the mini-computer, usually with time-sharing and program development facilities. Ultimately, the mini-computer grew up to encompass the VAX and larger mini-computers from Data General, Prime, and others.
Deployment of mini-computer systems was a replica for how personal computers would be used, but few of the mini-computer makers managed to profit from it.

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 supramolecular 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.

Water


Water is a tasteless, odorless, and nearly colorless substance in its pure form that is essential to all known forms of life and is known also as the most worldwide solvent. Water is a plentiful essence on Earth. It exists in many places and forms: mostly in the oceans and polar ice caps, but also as clouds, rain water, rivers, freshwater aquifers, and
sea ice. On the planet, water is always moving through the cycle linking vanishing, rainfall, and runoff to the sea.
Water that humans consume is called potable water. This natural resource is becoming scarcer in certain places as human population in those places increases, and its availability is a major social and economic concern.

A surprising substance
Changing appearances
Drinking water for more details on this topic, see Category: Forms of water.
Water takes many different shapes on earth: water vapor and clouds in the sky, waves and icebergs in the sea, glaciers in the mountain, aquifers in the ground, to name but a few. Through evaporation, precipitation, and runoff, water is constantly flowing from one form to another, in what is called the water cycle.
Because of the value of precipitation to agriculture, and to mankind in general, we give different names to its various forms: while rain is common in most countries, other phenomena are quite surprising when seen for the first time: hail, snow, fog or dew for example. When properly lit, water drops in the air can refract sunlight to create rainbows.
Similarly, water runoffs have played main roles in human history: rivers and irrigation brought the water needed for agriculture. Rivers and the seas offered prospect for travel and commerce. Through erosion, runoffs played a major part in shaping our environment provided that river valleys and deltas which provide rich soil and level ground for the enterprise of population centers.
Water also infiltrates the ground and goes into aquifers. This groundwater later flows back to the surface in springs or more outstandingly in hot springs and geysers. Groundwater is also extracted unnaturally in wells.

Transistor radio


The transistor radio is a small radio receiver.RCA demonstrated a prototype transistor radio in 1952. The first commercial transistor radio, the Regency TR-1, was announced on October 18, 1954 by the Regency Division of Industrial Development Engineering Associates of Indianapolis, Indiana and put on sale in November of 1954. It cost $49.95 (the equivalent of $361 in year-2005 dollars) and sold approximately 100,000 units.The use of transistors in its place of vacuum tubes as the amplifier elements meant that the device was much smaller and necessary far less power to operate than a tubed radio. The characteristic portable radio of the fifties was about the size and weight of a small laptop computer, and contained several heavy batteries: one or more A batteries to heat the tube filaments and a large 45 to 90 volt B battery for plate voltage. By comparison, the "transistor" was about the size and weight of today's cassette-playing Walkman and operated off a single compact 9 V battery. The now-familiar 9 V battery was introduced particularly for powering transistor radios.

Postal Marking

Less ordinary types include forwarding addresses, routing annotations, warnings, postage due notices and explanations, such as for damaged or delayed mail. A key part of postal history is the recognition of postal markings, their purpose, and period of use.

Service marks give information to the sender, recipient, or another post office. Advice marks notify about forwarding, misspending, and letters received in bad condition, letters received too late for delivery by a certain time, or the reason for a delay in mail delivery. Dead letter offices would use various markings to keep track of their progress in finding the addressee, such as a document that the letter had been advertised in the local newspaper. The tracking procedure for registered mail may entail multiple marks and notations.


Auxiliary marks are functional by an organization other than the postal administration. For instance, 19th century mail delivery often relied on a mix of private ships, steamboats, stagecoaches, railroads, and other transportation organizations to transfer mail. Many of these organizations applied their own markings to each item, occasionally saying simply "STEAMSHIP" or some such, while others had elaborate designs. Similar direction-finding notations were also used in the early days of airmail.

The traditional way to be valid a postal marking is with the use of a rubber or metal hand stamp; handwritten notations are sometimes seen for unusual situations or in very small post offices. In the United States, modern postal markings may appear in the form of yellow paste labels with the text printed on them. Many postal administrations now have the ability to print inkjet observations directly onto a cover, either as a barcode for reading by other equipment, or as text.

Goshawk

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

It is an extensive species all through the moderate parts of the northern hemisphere. In North America it is named as the Northern Goshawk. It is typically inhabitant, but birds from colder regions of north Asia and Canada journey south for the winter.


Goshawk in flight this species nests in trees, building a new nest each year. It hunts birds and mammals in woodland, relying on revelation as it flies from a perch or hedge-hops to catch its quarry ignorant. Animals as large as hares and Pheasant are taken. Its call is a ferocious screech. Many older goshawks reject to attack hares, if it was earlier seriously kicked by a hare which it tried to catch.

This bird is a raptor with short large wings and a long tail, both adaptations to maneuvering through trees. The male is blue-grey above and banned grey below, 49-56 cm long with a 93-105 cm wingspan. The much larger female is 58-64 cm long with a 108-127 cm wingspan, slate grey above grey below. The youthful is brown above and barred brown below. The flight is a characteristic "slow flap – slow flap – straight glide".
In Eurasia, the male is confusable with a female Sparrow hawk, but is superior, much bulkier and has moderately longer wings. In spring, he has an impressive roller-coaster display, and this is the best time to see this enigmatic forest bird

Lens

A lens is a device for either concentrating or diverging light, normally formed from a piece of shaped glass. Analogous devices used with other types of electromagnetic radiation are also called lenses: for instance, a microwave lens can be made from paraffin wax.The earliest records of lenses date to Ancient Greece, with Aristophanes' play The Clouds (424 BC) mentioning a burning-glass (a convex lens used to focus the sun's rays to produce fire). The writings of Pliny the Elder also show that burning-glasses were recognized to the Roman Empire, and mentions what is possibly the first use of a corrective lens: Nero was known to watch the gladiatorial games throughout a concave-shaped emerald (presumably to correct for myopia). Seneca the Younger (3 BC--65) described the magnifying effect of a glass globe filled with water.Widespread use of lenses did not happen until the invention of spectacles, probably in Italy in the 1280s.

Video Camera
A professional video camera (often called a "television camera"
even though the use has extend) is a high-end tool for video
recording electronic moving images (as opposed to a film camera,
that records the images on film). Formerly developed for use in
television studios, they are now normally used for corporate and
educational videos, music videos, direct-to-video movies, etc.
Not as much of advanced video cameras used by customers are
often referred to as camcorders.
There are two kind of professional video cameras: High end
portable, video recording cameras (which are, confusingly,
called camcorders too) used for ENG image gaining, and studio
cameras which lack the recording capability of a camcorder, and
are often fixed on studio pedestals.
Professional video cameras confine and transfer two dimensional
images serially, at specified capture rates, usually in the
visible range of the electromagnetic spectrum.
Most studio cameras situate on the floor, usually with pneumatic
or hydraulic mechanisms to regulate the height, and are usually
on wheels

Telephone

The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device to transmits and receives sound (most commonly voice and speech) through great distances. Most telephones function by means of electric signals over a complex public switched telephone network of equipment which allows almost any phone user to speak to almost any other.
Until relatively recently the word telephone could generally be assumed to refer to a landline phone. Now, cordless telephones and cell phones have become sufficiently common that no such presumption can be made. There are four principal means by which telephone signals are transmitted: throughout a traditional landline which uses physical dedicated wire connections; wireless or Radiotelephony, which transmits messages using either analog or digital radio signals; satellite telephones which bounce signals off of telecommunications satelites; and voice over internet protocol (VOIP) telephones, which use broadband internet cables.
The electric telephone is recognized to various inventors. The actual history is a subject of complex dispute. Among others Antonio Meucci, Philip Reis, and Alexander Graham Bell are all credited with inventing.

Film

Film is a term that encompasses motion pictures as individual projects, as well as the field in general. The source of the name comes from the fact that photographic film (also called filmstock) has historically been the main medium for recording and displaying motion pictures. Many other terms exist — motion pictures, the silver screen, photoplays, picture shows, flicks — and most commonly movies. Academics and the English-speaking international society prefer to use film or "cinema", due to the colloquial nature of these other terms.
Films are created by recording actual people and objects with cameras, or by creating them using animation techniques and/or special effects. They include a series of individual frames, but when these images are shown quickly in succession, the illusion of motion is given to the viewer. Flickering between frames is not seen due to an effect known as persistence of vision — whereby the eye retains a visual image for a fraction of a second after the source has been removed. Perhaps of more relevance is what causes the perception of motion — a psychological effect known as beta movement.

Beauty

Beauty in nature is a general theme in modern life and in art, and books emphasizing beauty in nature fill large sections of libraries and bookstores. That nature has been depicted and famous by so much art, photography, poetry and other literature shows the strength with which many people associate nature and beauty. Why this association exists, and what the association consists of, is studied by the branch of philosophy called aesthetics. Beyond certain basic characteristics that many philosophers agree about to explain what is seen as beautiful, the opinions are almost endless.Many scientists, who study nature in more specific and organized ways, also share the conviction that nature is beautiful; the French mathematician, Jules Henri Poincaré (1854-1912) said:
The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
If nature were not beautiful, it would not be worth knowing, and if nature were not worth meaningful, life would not be worth living. Of course I do not here speak of that beauty which strikes the senses, the beauty of character and of appearance; not that I undervalue such beauty, far from it, but it has not anything to do with science; I mean that profounder beauty which comes from the harmonious order of the parts and which a pure intelligence can grasp.
A general classical idea of beautiful art involves the word mimesis, the imitation of nature. Also in the realm of ideas about beauty in nature is that the perfect is indirect through symmetry, equal division, and other perfect mathematical forms and notions.

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.

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.