Saturday, November 21, 2009

Cancer (astrology)


Cancer () is the fourth astrological sign in the Zodiac, originating from the constellation of Cancer. In western astrology, this sign is no longer aligned with the constellation as a result of the precession of the equinoxes. In astrology, Cancer is considered a "feminine", negative (introvert) sign. It is also considered a water sign and is one of four cardinal signs.[2] Cancer isruled by the Moon. Being the fourth sign in the zodiac, Cancer has been associated with the astrological fourth house.

Individuals born when the Sun was in this sign are considered Cancer individuals. Under thetropical zodiac, the Sun enters Cancer on the moment of summer solstice by definition, or roughly on June 22, leaving it around July 23. Under the sidereal zodiac, it is currently roughly from July 16 to August 15. The Sanskrit name of Cancer in Hindu astrology is Karka.



What is CT Scanning of the Body?

CT scanning—sometimes called CAT scanning—is a noninvasive medical test that helps physicians diagnose and treat medical conditions.

CT scanning combines special x-ray equipment with sophisticated computers to produce multiple images or pictures of the inside of the body. These cross-sectional images of the area being studied can then be examined on a computer monitor or printed.

CT scans of internal organs, bone, soft tissue and blood vessels provide greater clarity and reveal more details than regular x-ray exams.

Using specialized equipment and expertise to create and interpret CT scans of the body,radiologists can more easily diagnose problems such as cancers, cardiovascular disease, infectious disease, trauma and musculoskeletal disorders.


Radar


The basic principle of operation of primary radar is simple to understand. However, the theory can be quite complex. An understanding of the theory is essential in order to be able to specify and operate primary radar systems correctly. The implementation and operation of primary radars systems involve a wide range of disciplines such as building works, heavy mechanical and electrical engineering, high power microwave engineering, and advanced high speed signal and data processing techniques. Some laws of nature have a greater importance here.

Radar measurement of range, or distance, is made possible because of the properties of radiated electromagnetic energy.

  1. Reflection of electromagnetic waves
    The electromagnetic waves are reflected if they meet an electrically leading surface. If these reflected waves are received again at the place of their origin, then that means an obstacle is in the propagation direction.
  2. Electromagnetic energy travels through air at a constant speed, at approximately the speed of light,
    • 300,000 kilometers per second or
    • 186,000 statute miles per second or
    • 162,000 nautical miles per second.
    This constant speed allows the determination of the distance between the reflecting objects (airplanes, ships or cars) and the radar site by measuring the running time of the transmitted pulses.
  3. This energy normally travels through space in a straight line, and will vary only slightly because of atmospheric and weather conditions. By using of special radar antennas this energy can be focused into a desired direction. Thus the direction (in azimuth and elevation of the reflecting objects can be measured.

paino





he piano is a musical instrument which is played by means of a keyboard. Widely used in Western music for solo performances, ensemble use, chamber music, and accompaniment, the piano is also very popular as an aid to composing and rehearsal. Although not portable and often expensive, the piano's versatility and ubiquity have made it one of the world's most familiar musical instruments.
Pressing a key on the piano's keyboard causes a felt covered hammer to strike steel strings. The hammers rebound, allowing the strings to continue vibrating at their resonant frequencyThese vibrations are transmitted through a bridge to a sounding board that couples the acoustic energy to the air so that it can be heard as sound. When the key is released, a damper stops the string's vibration. Pianos are sometimes classified as both percussion and stringed instruments. According to the Hornbostel-Sachs method of music classification, they are grouped with chordophones.
The word piano is a shortened form of the word pianoforte, which is derived from the original Italian name for the instrument, clavicembalo [or gravicembalo] col piano e forte (literally harpsichord with soft and loud). This refers to the instrument's responsiveness to keyboard touch, which allows the pianist to produce notes at different dynamic levels by controlling the speed with which the hammers hit the strings.



he piano is a musical instrument which is played by means of a keyboard. Widely used in Western music for solo performances, ensemble use, chamber music, and accompaniment, the piano is also very popular as an aid to composing and rehearsal. Although not portable and often expensive, the piano's versatility and ubiquity have made it one of the world's most familiar musical instruments.
Pressing a key on the piano's keyboard causes a felt covered hammer to strike steel strings. The hammers rebound, allowing the strings to continue vibrating at their resonant frequency.[1] These vibrations are transmitted through a bridge to a sounding board that couples the acoustic energy to the air so that it can be heard as sound. When the key is released, a damper stops the string's vibration. Pianos are sometimes classified as both percussion and stringed instruments. According to the Hornbostel-Sachs method of music classification, they are grouped with chordophones.
The word piano is a shortened form of the word pianoforte, which is derived from the original Italian name for the instrument, clavicembalo [or gravicembalo] col piano e forte (literally harpsichord with soft and loud). This refers to the instrument's responsiveness to keyboard touch, which allows the pianist to produce notes at different dynamic levels by controlling the speed with which the hammers hit the strings.




A robot is a virtual or mechanical artificial agent. In practice, it is usually an electro-mechanical machine which is guided by computer or electronic programming, and is thus able to do tasks on its own. Another common characteristic is that by its appearance or movements, a robot often conveys a sense that it has intent or agency of its own.




A bicycle, also known as a bike, push bike or cycle, is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other. A person who rides a bicycle is called a cyclist or a bicyclist.
Bicycles were introduced in the 19th century and now number about one billion worldwide, twice as many as automobiles.[1] They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services, and competitive sports.
The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885.[2] Many details have been improved, especially since the advent of modern materials and computer-aided design. These have allowed for a proliferation of specialized designs for particular types of cycling.
The invention of the bicycle has had an enormous impact on society, both in terms of culture and of advancing modern industrial methods. Several components that eventually played a key role in the development of the automobile were originally invented for the bicycle – e.g., ball bearings, pneumatic tires, chain-driven sprockets, spoke-tensioned wheels, etc.

A bicycle, also known as a bike, push bike or cycle, is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other. A person who rides a bicycle is called a cyclist or a bicyclist.
Bicycles were introduced in the 19th century and now number about one billion worldwide, twice as many as automobiles.[1] They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services, and competitive sports.
The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885.[2] Many details have been improved, especially since the advent of modern materials and computer-aided design. These have allowed for a proliferation of specialized designs for particular types of cycling.
The invention of the bicycle has had an enormous impact on society, both in terms of culture and of advancing modern industrial methods. Several components that eventually played a key role in the development of the automobile were originally invented for the bicycle – e.g., ball bearings, pneumatic tires, chain-driven sprockets, spoke-tensioned wheels, etc.

Thursday, November 19, 2009

the flying snake


The Flying Lizards were a British experimental rock band, who were formed in 1978 in London, England.[1] They are best remembered as New wave one-hit wonders, thanks to their deliberately eccentric cover of Barrett Strong's "Money", which became a surprise UK and US chart success in 1979

Computer networking


omputer networking is the engineering discipline concerned with communication betweencomputer systems or devices. Networking, routers, routing protocols, and networking over the public Internet have their specifications defined in documents called RFCs.[1] Computer networking is sometimes considered a sub-discipline of telecommunications, computer science, information technology and/or computer engineering. Computer networks rely heavily upon the theoretical and practical application of these scientific and engineering disciplines. There are three types of networks: 1.Internet. 2.Intranet. 3.Extranet. A computer network is any set of computers or devices connected to each other with the ability to exchange data

Friday, October 30, 2009

icu

ICU
An intensive care unit (ICU), critical care unit (CCU), intensive therapy unit or intensive treatment unit (ITU) is a specialized department used in many countries' hospitals that providesintensive care medicine. Many hospitals also have designated intensive care areas for certain specialities of medicine, as dictated by the needs and available resources of each hospital. The naming is not rigidly standardized.

jets


A fighter aircraft is a military aircraft designed primarily for air-to-air combat with other aircraft, as opposed to a bomber, which is designed primarily to attack ground targets by dropping bombs. Fighters are small, fast, and maneuverable. Many fighters have secondary ground-attack capabilities, and some are dual-roled as fighter-bombers; the term "fighter" is also sometimes used colloquially for dedicated ground-attack aircraft. Fighter aircraft are the primary means by which armed forces gain air superiority over their opponents in battle. Since at least World War II, achieving and maintaining air superiority has been a key component of victory in warfare, particularly conventional warfare between regular armies (as opposed toguerrilla warfare). The purchase, training and maintenance of a fighter fleet represent a very substantial proportion of defense budgets for modern militaries.

Moniter lizard


Monitor lizards also known as bayawak or goannas, genus Varanus, are members of the family Varanidae. Varanus is a group of carnivorous lizards which includes the heaviest living lizard, the Komodo dragon and the crocodile monitor which is the longest lizard in the world. The closest living relatives are the anguid and helodermatid lizards.[1]

Monitor lizards are generally large reptiles, although some can be as small as 12 centimetres in length. They have long necks, powerful tails and claws, and well-developed limbs. Most species are terrestrial, but arboreal and semi-aquatic monitors are also known. Almost all monitor lizards are carnivorous, although Varanus prasinusand Varanus olivaceus are also known to eat fruit.[2] They are oviparous, laying from 7 to 37 eggs, which they often cover with soil or protect in a hollow tree stump.[3]

guitar


The guitar is a musical instrument with ancient roots that adapts readily to a wide variety of musical styles. It typically has six strings, but four-, seven-, eight-, nine-, ten-, eleven-, twelve-,thirteen- and eighteen-string guitars also exist. The size and shape of the neck and the base of the guitar also vary, producing a variety of sounds. The two main types of guitars are the electric guitarand the acoustic guitar (of which the three main types are the classical guitar, the steel-string flattop guitar, and the archtop guitar).

Guitars are recognized as one of the primary instruments in flamenco, jazz, blues, country,mariachi, rock music, and many forms of pop. They can also be a solo classical instrument. Guitars may be played acoustically, where the tone is produced by vibration of the strings and modulated by the hollow body, or they may rely on an amplifier that can electronically manipulate tone. Such electric guitars were introduced in the 1930s, and they have continued to have a profound influence on popular culture

Cats





The cat (Felis catus), also known as the domestic cat or housecat[5] to distinguish it from other felinesand felids, is a small carnivorous mammal that is valued by humans for its companionship and its ability to hunt vermin and household pests. It has been associated with humans for at least 9,500 years[6] and is currently the most popular pet in the world.[7]

A skilled predator, the cat is known to hunt over 1,000 species for food. It can be trained to obey simple commands. Individual cats have also been known to learn on their own to manipulate simple mechanisms, such as doorknobs and toilet handles.[8] Cats use a variety of vocalizations and types ofbody language for communication, including meowing, purring, trilling, hissing, growling, squeaking,chirping, clicking, and grunting.[9] They are also bred and shown as registered pedigree pets. This hobby is known as cat fancy.

Until recently the cat was commonly believed to have been domesticated in ancient Egypt, where it was a cult animal.[10] However, in 2004, a domesticated cat that was buried 9,500 years ago was discovered in Cyprus, and a study in 2007 found that the lines of descent of all house cats probably run through as few as five self-domesticating African Wildcats (Felis silvestris lybica) circa 8000 BC, in the Near East.[4]