Sunday, April 29, 2007


A Trailer is normally an unpowered vehicle pulled by a powered vehicle, because powered trailers are more explicitly called potrailers. Commonly, the term trailer refers to such vehicles used for transport of goods and materials.

Trailer winches are intended to load (or unload) boats and other cargo to and from a trailer. The are invented a ratchet mechanism and cable. The handle on the ratchet mechanism is twisted to tighten or loosen the tension on the winch cable. There are both manual and motorized trailer winches

Popup campers are trivial, aerodynamic trailers that can be towed by a small car, such as the BMW Air Camper and the Coleman Bayside. They are built to be shorter than the tow vehicle, minimizing drag.

Others range from two-axle campers that can be pulled by most mid-sized pickups to trailers that are as long as the host country's law allows for drivers without individual permits. Larger campers tend to be fully integrated leisure vehicles, which often are used to tow single-axle dolly trailers to allow the driver to bring small cars on their travels.

Monday, April 23, 2007

British Half Penny coin

100 The British decimal Half Penny or Ha'penny coin was issued on 15 February 1971, the day the British currency was decimalized. In put into practice it had been available from banks in bags for some weeks previously.

The main idea behind the coin's configuration was to enable certain pre-decimal coins—most notably the sixpence—to remain in circulation during the transition to decimal coinage; in the same vein a decimal quarter-penny coin was also proposed, but ended up never being formed.

The coin was minted in figurine. The coin weighed 1.78 grams and had a diameter of 17.14 millimeters. It was the smallest coin used in the decimal currency coinage by both size and value, and was nicknamed the "tidier" on account of its size. By the early 1980s its value was minimal and its main utility was as a useful driver of small screws. The 1984 half penny was only issued in mint and proof sets by the Royal Mint, and the coin was demonetized and withdrawn from circulation in December 1984.

The reverse of the coin, designed by Christopher Ironside, was simply a crown, with the fraction "½" below the crown, and either NEW PENNY or HALF PENNY above the crown.

Thursday, April 19, 2007

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.

Tuesday, April 10, 2007


A door is a makeup in a wall that allows easy transformation between an opening and a closed wall. It is establish in many houses and other buildings: internal ones, doors giving access to the street/external world, and doors to private outdoor areas such as a garden or balcony. In an apartment building, an midway kind is the outer door of an apartment, inside the building.
The first records are those represented in the paintings of the Egyptian tombs, in which they are shown as single or double doors, each in a single piece of wood. In Egypt, where the climate is intensely dry, there would be no fear of their warping, but in other countries it would be necessary to frame them, which according to Vitruvius was done with stiles and rails: the spaces enclosed being filled with panels let into grooves made in the stiles and rails. The stiles were the vertical boards, one of which, tenoned or hinged, is known as the hanging stile, the other as the middle or meeting stile. The horizontal cross pieces are the top rail, bottom rail, and middle or intermediate rails. The most ancient doors were in timber, those made for King Solomon's temple being in olive wood, which were fixed and overlaid with gold. The doors dwelt upon in Homer would appear to have been cased in silver or brass. Besides Olive wood, elm, cedar, oak and cypress were used.

All ancient doors were hung by pivots at the top and bottom of the hanging stile which worked in sockets in the lintel and cill, the final being always in some hard stone such as basalt or granite. Those found at Nippur by Dr. Hilprecht, dating from 2000 B.C. were in dolorite. The tenons of the gates at Balawat were covered with bronze. These doors or gates were hung in two leaves, each about 8 ft.4 in. wide and 27 ft. high; they were enclosed with bronze bands or strips, 10 in. high, covered with repouss embellishment of figures, etc. The wood doors would seem to have been about 3 in. thick, but the hanging stile was over 14 inches diameter. Other sheathings of various sizes in bust have been found, which proves this to have been the universal method adopted to protect the wood pivots. In the Hauran in Syria, where timber is scarce the doors were made in stone, and one measuring 5 ft. 4 in. by 2 ft. 7 in. is in the British Museum; the band on the meeting stile shows that it was one of the leaves of a double door. At Kuffeir near Bostra in Syria, Burckhardt found stone doors, 9 to 10 ft. high, being the entrance doors of the town. In Etruria many stone doors are referred to by Dennis.

Monday, April 09, 2007

Postage Stamp

Friday, April 06, 2007


The peafowl are the three type of bird in the genera Pavo and Afropavo of the pheasant family, Phasianidae. They are mainly notable for the male's profligate tail, a result of sexual selection, which it displays as part of courtship. The male is called a peacock, the female a peahen. In common English usage, however, "peacock" is used to mean any peafowl.

The typical Asiatic peafowl belonging to the genus Pavo contain the familiar Indian Peafowl, Pavo cristatus and the weakly known Dragonbirds or Green Peafowl Pavo muticus. Some biologists consider that there are at least five idiosyncratic and gravely scarce species of Green Peafowl while others classify them into a single species with three subspecies.

The Arakan Dragonbird Pavo spicifer was once inhabitant to Northern Western Myanmar, Southern Tibet and Assam. The Indo-Chinese or Siamese Dragonbird Pavo imperator was once inhabitant to South East Myanmar and Thailand. The Annametic Dragonbird Pavo annamensis occupied the broadlieaf evergreen forests of Cambodia, Vietnam, Laos and Southern Yunnan China.
The Javanese Green Peafowl, Pavo javanensis is inhabitant only to the island of Java. The destroyed Malay or Pahang Peafowl Pavo muticus was thought by early naturalists to least the Pliocene rules out an opening by humans. Northern Yunnan is the home of one of the most interesting forms of Green Peafowl. The Yunnan Dragonbird, Pavo yunnanensis is most individual.

Monday, April 02, 2007


An airline is an association that specializes in provided that designed air transport services to passengers and/or for cargo; although some airlines do offer chartered flight services as well. Airlines lease or own their aircraft with which to supply these services and may form partnerships or alliances with other airlines for reasons of mutual benefit.

Industry overview

An airline is an association that specializes in provided that designed air transport services to passengers and/or for cargo; although some airlines do offer chartered flight services as well. Airlines lease or own their aircraft with which to supply these services and may form partnerships or alliances with other airlines for reasons of mutual benefit.

The headquarters of Air India is Mumbai.The universal replica of rights has gone from government owned or supported to self-determining, for-profit public companies. This occurs as regulators permit greater freedom, in steps that are usually decades not together. This pattern has not been complete for all airlines in all regions.
The command for air travel services is imitative demand. That is, it depends on other things: business needs for cargo shipments, business passenger demand, and leisure passenger demand, all prejudiced by macroeconomic activity in the markets under learn. These patterns are dreadfully serial, and often day-of-week, time-of-day, and even directionally variable.
The business is returning. Four or five years of poor production are followed by five or six years of slowly improving good performance. But efficiency in the good years is normally low, in the range of 2-3% net profit after interest and tax. It is in this time that airlines begin paying for new generations of airplanes and other service upgrades they planned to respond to the increased demand. Since 1980, the industry as a whole has not even earned back the cost of capital during the best of times. Equally, in bad times losses can be radically inferior.