Monday, August 27, 2007

Leaf vegetable


Leaf vegetables, also called potherbs, greens, or leafy greens, are plant leaves eat as a vegetable; sometimes attend by tender petioles and shoots. Although they come from a very broad diversity of plants, most share a great deal with other leaf vegetables in nutrition and cooking methods.

Nearly one thousand types of plants with edible leaves are known Leaf vegetables most often come from short-lived herbaceous plants such as lettuce and spinach. Woody plants whose leaves can be eaten as leaf vegetables include Adenosine, Aralia, and Moringa, Morus, and Toona species.

The leaves of many fodder crops are also edible by humans, but frequently only eaten under famine conditions. Examples include alfalfa, clover, and most grasses, as well as wheat and barley. These plants are often much more prolific than more traditional leaf vegetables, but utilization of their rich nutrition is difficult, primarily because of their high fiber content. This obstacle can be overcome by further giving out such as drying and grinding into powder or pulping and pressing for juice.

During the first half of the 20th century many grocery stores with vegetable sections sold small bunch of herbs tied with a thread to small green and red peppers known as "potherbs."

Tuesday, August 21, 2007

Chemistry

Chemistry is the science of matter at the atomic to molecular scale, production mainly with collections of atoms, such as gases, molecules, crystals, and metals. Chemistry deals with the composition and statistical properties of such structures, as well as their transformations and interactions to become materials encountered in daily life. Chemistry also deals with sympathetic the properties and interactions of individual atoms with the purpose of applying that knowledge at the macroscopic level. According to contemporary chemistry, the physical properties of materials are usually determined by their structure at the atomic scale, which is itself defined by interatomic forces.

Monday, August 13, 2007

Chef's uniform

The conventional chef's uniform, including toque (traditional hat), white double breasted jacket, and checked pants are immediately recognized by most members of the Western world, especially in this day of television's celebrity chefs. The double breasted jacket can be inverted to conceal stains. Its thick cotton cloth protects from the heat of stove and oven and protects from splattering of steaming liquids. An apron is an obviously useful piece of utensils used to guard the rest of the wearer's garments from food splatters and stains.

The toque (chef's hat) dates back to the 16th century when hats were regular in many businesses. Different heights of hats point out rank within a kitchen. Some modern chefs have put their own diverse whirl on the traditional uniform. But the traditional, practical, clothing of the chef still remainders a standard in the food industry.

Tuesday, August 07, 2007

Public transport

Public transport, public transportation, public travel or mass transit comprises all transport systems in which the passengers do not tour in their own vehicles. While it is generally taken to include rail and bus services, wider definitions would comprise scheduled airline services, ship, taxicab services etc. – any system that transports members of the universal public. A further restriction that is sometimes practical is that it must take place in shared vehicles that would bar taxis that are not shared-ride taxis.

Monday, July 30, 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 relational forms 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. 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.

Tuesday, July 24, 2007

Hummingbird

Hummingbirds are small birds in the family Trochilidae, inhabitant only to the Americas. They are known for their aptitude to hover in mid-air by quickly flapping their wings, 15–80 times per second (depending on the species). The Giant Hummingbird's wings beat 8–10 beats per second, the wings of medium sized hummingbirds beat about 20–25 beats for each second and the smallest beat 70 beats per second. Capable of continued hovering, the hummingbird has the ability to fly intentionally backwards (this is the only group of birds able to do so or vertically, and to maintain position while drinking from flower blossoms. They are named for the feature hum made by their wings.

Hummingbirds are involved to many flowering plants—shrimp plants, Bee Balm, Helicon, Butterfly Bush, Hibiscus, bromeliads, cannas, verbenas, honeysuckles, salvias, pentas, fuchsias, many penstemons. It is frequently stated that they are especially attracted to red and yellow flowers.

Monday, July 16, 2007

Robotics

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

Although the outside and capabilities of robots vary extremely, all robots share the features of a mechanical, movable structure under some form of control. The chain is misshapen of links, actuators and joints which can allow one or more degrees of freedom. Most modern robots use open sequential chains in which each link connects the one before to the one after it. These robots are called serial robots and often look like the human arm. A few robots, such as the Stewart platform, use closed parallel kinematic chains. Other structures, such as those that imitate the mechanical structure of humans, diverse animals and insects, are relatively rare. However, the development and use of such structures in robots is a dynamic area of research. Robots used as manipulators have a finish effector mount on the last link. This end effector can be something from a welding mechanism to a mechanical provide used to manipulate the environment.

Wednesday, July 11, 2007

Hardware and software design

Supercomputers using custom CPUs traditionally gained their speed over conventional computers through the use of innovative designs that allow them to carry out many tasks in parallel, as well as complex feature engineering. They tend to be expert for certain types of computation, usually numerical calculations, and perform poorly at more general computing tasks. Their memory hierarchy is very cautiously designed to ensure the processor is kept fed with data and commands at all times—in fact, much of the performance difference between slower computers and supercomputers is due to the memory hierarchy. Their I/O systems tend to be planned to support high bandwidth, with latency less of an issue, because supercomputers are not used for transaction processing.

As with all highly parallel systems, Amdahl's law applies, and supercomputer designs devote great effort to eliminate software serialization, and using hardware to speed up the remaining bottlenecks.

Thursday, June 28, 2007

Waka

In the Maori language, waka are Maori watercraft, generally canoes. Similar craft are encountered in Polynesia, with related names such as vaka.

Waka range is from small, lightweight canoes, such as waka tiwai used for fishing individuals, during very large waka taua, manned by up to eighty paddlers and up to fourty mtrs in length, large double-hulled canoes for oceanic voyaging.

Many waka are single-hulled vessels set from hollowed tree trunks. Small waka consist of an only piece while large waka usually consist of some pieces jointed and lashed together. Some waka, mainly in the Chatham Islands, were not accustomed canoes but were constructed from raupo stalks.

Ocean waka, Paddled could be in any size, but were generally propelled by sail. Waka taua are paddled to express their mana.

Small utilitarian waka are generally plain and unornamented. Superior canoes waka taua in particular, are highly carved. Waka taua are no longer used in warfare but mostly for ceremonial purposes.

Tuesday, June 12, 2007

Punt

A punt is a flat-bottomed boat with a square-cut bow, planned for use in small rivers or other shallow water. Punting refers to boating in a punt; the punter normally propels the punt by pushing beside the river bed with a pole.
Punts were initially built as cargo boats or platforms for fowling and angling but in modern times their use is almost wholly confined to pleasure trips on the rivers in the university towns of Oxford and Cambridge in England and races at a few summer regattas on the Thames.
A customary river punt differs from many other types of wooden boat in that it has no keel, stem or sternpost. In its place it is built rather like a ladder with the main structure being two side panels connected by a series of 4 in (10 cm) cross planks, known as "treads", spaced about 1 foot (30 cm) apart.
The first punts are traditionally linked with the River Thames in England and were built as small cargo boats or platforms for fishermen. Pleasure punts — particularly built for recreation — became popular on the Thames between 1840 and 1860. Some other boats have a similar shape to a traditional punt — for example the Optimist training dinghy or the air boats used in the Everglades — but they are normally built with a box construction instead of the open ladder-like design of a traditional Thames pleasure punt.