Robotics

Robotics is the science and technology of robots, their design, manufacture, and application.Robotics requires a functioning knowledge of electronics, mechanics, and software. A person working in the field is a roboticist. The word robotics was first used in publish by Isaac Asimov, in his science fiction short story "Runaround" (1941).

Although the exterior and capabilities of robots fluctuate enormously, all robots share the features of a mechanical, movable structure under some form of control. The chain is warped of links, actuators and joints which can allow one or more degrees of freedom. Most contemporary robots use open serial chains in which each link connects the one before to the one after it. These robots are called serial robots and often resemble the human arm. A few robots, such as the Stewart platform, exploit closed parallel kinematic chains. Other structures, such as those that mimic the mechanical structure of humans, different animals and insects, are comparatively rare. However, the development and use of such structures in robots is an dynamic area of research. Robots used as manipulators have an end effector mounted on the last link. This end effector can be anything from a welding mechanism to a mechanical hand used to manipulate the environment.

Personal computer

A personal computer or PC is usually a microcomputer intended to be used by one person at a time, and suitable for general principle tasks such as word processing, programming, sending messages or digital documents to other computers on the network, multimedia editing or game play, usually used to run software not written by the user. Unlike minicomputers, a personal computer is often owned by the person using it, representing a low cost of purchase and simplicity of operation. The user of a modern personal computer may have trivial knowledge of the operating environment and application programs, but is not unavoidably interested in programming or even able to write programs for the computer.

In modern usage PC nearly always refers to an IBM compatible and the term may even be used for machines that are in no way personal computers but still use the basic architecture of the IBM pc. The first generation of microcomputers were called just that, and only sold in small numbers to those able to operate them: engineers and accomplished. The second generation micros were known as home computers, and are discussed in that section.

Radio

Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.Radio waves.Radio waves are a form of electromagnetic radiation, formed whenever a charged object accelerates by a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. This is the variety from a few tens of hertz to a few hundred gigahertz.Electromagnetic radio spectrum Other types of electromagnetic radiation, with frequencies above the RF range are infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.Radio transmission diagram and electromagnetic waves.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not need a medium of transport induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. Although the word 'radio' is used to explain this phenomenon, the transmissions which we know as television, radio, radar, and cell phone are all classed as radio frequency emissions.

Chair

A chair is a portion of furniture for sitting, consisting of a seat, a back, and sometimes arm rests, commonly for use by one person. Chairs also often have legs to support the seat raised above the floor. Without back and arm rests it is called a stool. A chair for more than one person is a couch, sofa, settee, loveseat or bench. A take apart footrest for a chair is known as an ottoman, hassock or poof. A chair mounted in a vehicle or in a theatre is simply called a seat. Chairs as furniture are usually not attached to the floor and so can be moved.
The back often does not extend all the way to the seat to allow for ventilation. Likewise, the back and sometimes the seat are made of porous materials or have holes drilled in them for ornamentation and ventilation.

The back may expand above the height of the head. There may be separate headrests. Headrests for seats in vehicles are important for preventing whiplash injuries to the neck when the vehicle is concerned in a rear-end collision.


Design and ergonomics

This unusual rocking chair is made of rough wood to give it an old-fashioned look. Chair design considers intended usage, ergonomics, as well as non-ergonomic functional requirements such as size, stack ability, fold ability, weight, durability, stain resistance and artistic design. Intended usage determines the desired seating position. "Task chairs", or any chair intended for people to work at a desk or table, including dining chairs, can only recline very slightly; otherwise the occupant is too far away from the desk or table. Dental chairs are essentially reclined. Easy chairs for watching television or movies are anywhere in between depending on the height of the screen.

Ergonomic designs distribute the weight of the inhabitant to various parts of the body. A seat that is higher results in hanging feet and increased pressure on the underside of the knees. It may also result in no weight on the feet which means more weight elsewhere. A lower seat may shift too much weight to the "seat bones".

Asian Paradise Flycatcher

The Asian Paradise Flycatcher, also known as the Common Paradise Flycatcher, is a medium-sized passerine bird. It was in the past classified with the Old World flycatcher family Muscicapidae, but the paradise flycatchers, monarch flycatchers and Australasian fantails are now usually grouped with the drongos in the family Dicruridae, which has the majority of its members in Australasia and tropical southern Asia.

The Asian glory Flycatcher breeds from Turkestan to Manchuria. It is wandering, wintering in tropical Asia. There are resident populations further south, for example in southern India and Sri Lanka, so both visiting migrants and the in the vicinity reproduction subspecies take place in these areas in winter.

This species is typically originated in thick forests and other well-wooded habitats. Three or four eggs are laid in a cup shell in a tree.

The adult male Asian Paradise Flycatcher is about 20 cm long, but the long tail streamers double this. It has a black crested head, stale joke upperparts and pale grey underparts.

By their second year, the males of the wandering Indian race T. p. paradisi begin to obtain white feathers. By the third year, the male plumage is totally white, other than the black head. Males of the sedentary Sri Lankan race T. p. ceylonensis are forever stale joke.

The female of all races resembles the stale joke male, but has a grey throat, minor peak and lacks the tail streamers.

Jet Airways

Jet Airways is an airline based in India, helping familial and worldwide routes. The airline operates over 250 flights to 44 destinations athwart the country, with the majority of flights operated from Chhatrapati Shivaji International Airport, Mumbai. It presently controls about 40% of India's aviation market.

Background

Jet Airways was recognized on 5 May 1993 with a fleet of 4 Boeing 737-300 aircraft, with 24 daily flights helping 12 destinations.

Operations

Its 44 destinations contain most of the big cities in India. Its international destinations contain Kathmandu, Colombo, Singapore, Kuala Lumpur and London's Heathrow Airport. Jet Airways was the first personal airline of India to fly to international destinations. It was later joined by Air Sahara. The daily Delhi-London service started in October of that year.

Jet Airways and Air Sahara are the only personal airlines which survived the Indian business downward spiral of the 1990s. On January 19, 2006 Jet Airways announced that it is buying Air Sahara for $500 million. This is the biggest takeover in India's aviation history and the resulting airline will be the countries biggest.

In 2006 Jet Airways will be raising its way network from Delhi via the north Indian city of Amritsar, as it is to begin Amritsar-London and/or Amritsar-Birmingham.