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Nail

A nail is a metal object with a flat head and a long, sharp tip. A hammer or nail gun is used to put it into another object. It is often used to join two objects together. The history of the nail came in three periods: Hand-wrought forged nail pr ...

Nut (hardware)

A nut is a type of fastener with a threaded hole. Nuts are almost always used with a mating bolt to fasten parts together. Thus "nut and bolt" or "nuts and bolts" are term which recognise their pairing. Like bolt heads, their shape is usually hex ...

Rope

A rope is made out of several threads. The material can be organic, like flax, or it can be small threads of steel. A rope can be used to lift, or pull things, like pulling a ship into a harbor with another ship, or fixing the ship so it does not ...

Screw

Screw can also be a slang word for sexual intercourse. A screw is a sharp piece of threaded metal similar to a nail. Unlike a nail, a screw has spiral grooves down its spike. A screw is pressed down against wood and turned with a screwdriver. Tur ...

Staple (fastener)

A staple is a fastener that is usually made out of metal and is used to fasten paper to other paper or paper to special walls called bulletin boards. Some large staples may be used for industrial uses, such as masonry, roofing, corrugated boxes a ...

Stopper (plug)

A stopper is a small object used to seal a container. They are generally used for bottles or test tubes. They are usually made of plastic, rubber or cork. They are also known as bung, a plug or if made of cork, as a cork.

Tap (valve)

A tap, faucet, or spigot is something that a liquid or gas comes out of. Taps usually have a handle that can be turned to start or stop the liquid coming out. Many taps give water and are used in homes. They are found in kitchens and bathrooms. W ...

Valve

A valve is a device that it is used to decrease or stop the flow of a fluid. It can be installed for example in a pipe or a vessel. There are many types of valves. Some examples are: safety valve. gate valve butterfly valve globe valve They can b ...

Wire

Wire is a long, thin and flexible piece of metal. Wires are made in many different metals and sizes, and are used for many purposes. Wire rope has been used for centuries. Electrical wire is wire used to carry electricity. When people touch wire ...

Wire rope

Wire rope consists of several strands laid together like a helix. Each strand is likewise made of metal wires laid together like a helix. Initially wrought iron wires were used, but today steel is the main material used for wire ropes.

History of technology

The history of technology is the history of the invention of tools and techniques, and is similar in many ways to the history of humanity. People make new things and, conversely, many scientific endeavors are possible through technologies. Techno ...

Electrical telegraph

The electrical telegraph is a telegraph that uses electric signals. In general the term electrical telegraph refers to a signalling system where an operator makes and breaks an electrical contact with a telegraph key which results in an audible s ...

Four Great Inventions

The Four Great Inventions are the four most important inventions in the history of China. They are celebrated in Chinese culture for their historical importance. They are seen as symbols of Chinas advanced science and technology. The Four Great I ...

History of the sword

The different types of swords have been of great importance throughout history. In addition to its use as a weapon, the sword has been the object of special considerations forming part of funerary rituals, mythology and other ancient traditions.

Interchangeable parts

Interchangeable parts is a basic concept of creating identical or nearly identical parts to be mass produced. These parts can then be put together to form a product. For example, cars, computers, furniture, almost all products used today, are mad ...

Science and Technology in Ancient Manipur

"Science and Technology in Ancient Manipur" describes scientific knowledge, practices, devices and technologies, invented or used in Ancient Manipur. The Meitei ethnicity invented and used many simple machines. They also invented many advanced sc ...

Second Industrial Revolution

The Second Industrial Revolution was a period when advances in steel production, electricity and petroleum caused a series of innovations that changed society. With the production of cost effective steel, railroads were expanded and more industri ...

Telegraphy

Telegraphy = far and graphein = write) is the long-distance transmission of written messages without physical transport of letters. A telegraph sends electric pulses in a special code, composed from short and large marks. Usually, amateur radio o ...

Writing

Writing is the act of recording language on a visual medium using a set of symbols. The symbols must be known to others, so that the text may be read. A text may also use other visual systems, such as illustrations and decorations. These are not ...

3D printing

3D printing is a way of creating three dimensional solid objects. 3D printing is done by building up the object layer by layer. Usually, 3D printers use plastic, because it is easier to use and cheaper. Some 3D printers can 3D print with other ma ...

Design management

"Simply put, design management is the business side of design. Design management encompasses the ongoing processes, business decisions, and strategies that enable innovation and create effectively-designed products, services, communications, envi ...

Research and development

Research and development refers to a wide range of activities by businesses, governments and academic institutions designed to gather knowledge and test new ideas. This often leads to the development of new products or new ways of doing things. R ...

ELife

eLife is a scientific journal for the biomedical and life sciences. It is peer-reviewed and open access. It was established at the end of 2012 by the Howard Hughes Medical Institute, Max Planck Society, and Wellcome Trust. These organizations gav ...

Popular Mechanics

Popular Mechanics is an American magazine devoted to science and technology. It was first published January 11, 1902 by H.H. Windsor, and has been owned since the 1950s by the Hearst Corporation There is also a Latin American edition that has bee ...

Nature (journal)

Nature is a scientific journal. It was first published on 4 November 1869. It is the worlds most cited scientific journal. That means that, when scientists write formal reports of their experiments, they list all the earlier studies that they rea ...

New Scientist

New Scientist is a weekly scientific journal. It covers recent developments in science and technology for a general audience. The magazine was founded in 1956 and it is published by Reed Business Information Ltd. New Scientist is edited by Sumit ...

PLOS ONE

PLOS One is a scientific journal. It is an interdisciplinary journal. That means it prints scientific papers about almost any kind of science instead of just one. It prints papers about engineering, biology, the social sciences and humanities, fo ...

Reptiles (magazine)

Reptiles is a monthly magazine. It is published in Irvine, California. Reptiles magazine is a reptile and amphibian magazine. It talks about keeping and breeding many of their species. The magazines publisher is BowTie Inc. The first issue of the ...

Scientific American

Scientific American is a popular science magazine, published since August 28, 1845, making it the oldest continuously published magazine in the United States. It brings articles about new and innovative research to the non-scientific audience.

Skeptical Inquirer

The Skeptical Inquirer is an American science magazine. The Committee for Skeptical Inquiry publishes this magazine every other month. This magazines subtitle is now The magazine for science and reason. Articles in the magazine are about science ...

Zootaxa

Zootaxa is a scientific journal that publishes papers of zoology. It is edited by Magnolia Press. The magazine was created by Zhi-Qiang Zhang in 2001 and the magazine is issued every week. Zootaxa is indexed by BIOSIS, Zoological Record and the C ...

Auto-Tune

Auto-Tune is a proprietary audio processor made by Antares Audio Technologies. Auto-Tune uses a ph vocoder to fix pitch in vocal and instrumental performances. It is used to hide out of tune singing and mistakes. It lets singers perform perfectly ...

Bass amplifier

Bass instrument amplification is an amplifier used for bass guitars, double bass and similar instruments. It makes the sound they make louder. It is different from other types of amplification systems because it is difficult to reproduce low-freq ...

Cassette single

A cassette single is a recording of a single song sold on a compact audio cassette. Record companies introduced this sales format in the 1980s. At that time, vinyl record album sales were declining in favor of cassette recordings; the cassette si ...

Effect pedal

An effect pedal is an electronic device that can change the sound of an instrument or the voice of a person. Typical effects include echo, chorus, distortion, tremolo, reverb and flanger. A potentiometer is one of the electronic parts that effect ...

IRCAM

IRCAM stands for Institut de Recherche et Coordination Acoustique/Musique. It is an institute in Paris for composing electronic music. IRCAM is housed underneath the Pompidou Centre which is a very large building devoted to the arts, and named af ...

Jukebox

Jukeboxes are musical devices that play any selected song that is stored on it. They are partially automatic and usually operated by coin. The term jukebox came into use close to 1940, though in fact similar music devices were in use before that. ...

Music download

A music download is the act of downloading a song from the Internet to a users computer. This term can mean both legal downloads and downloads of copyright material without permission or paying. As of 2006, digital music sales are estimated to ha ...

Overdubbing

Overdubbing is a technique used by recording studios to add extra recorded sounds to a previously recorded performance.

Nanotechnology

Nanotechnology is a part of science and technology about the control of matter on the atomic and molecular scale - this means things that are about 100 nanometres across Nanotechnology includes making products that use parts this small, such as e ...

Buckypaper

Buckypaper is a thin sheet made from an aggregate of carbon nanotubes or carbon nanotube grid paper. The nanotubes are approximately 50.000 times thinner than a human hair. Originally, it was fabricated as a way to handle carbon nanotubes, but it ...

Nanoelectromechanical systems

Nanoelectromechanical systems will be very tiny machines, with dimensions thousands of times thinner than the human hair, that could be used as motors or sensors. The technology is very new and still in the laboratory stage, but may replace micro ...

Optics

Optics is the science of light and how it interacts with the world. Optics explains how rainbows exist, how light reflects off mirrors, how light refracts through glass or water, and what splits light shining through a prism. In addition to visib ...

Albedo

The albedo of an object is the extent to which it reflects light, defined as the ratio of reflected to incident electromagnetic radiation. It is a unitless measure indicative of a surfaces or bodys diffuse reflectivity. The word is derived from a ...

Aperture

The aperture of a photographic lens is a hole that can be adjusted to different sizes, using the aperture ring. This ring is behind the lens, but in front of the shutter. The aperture ring is a flat circle with a small hole in the centre. The sma ...

Autofocus

Autofocus is a procedure for finding the correct position of the lens for a scene. The autofocus feature can be provided in a system which includes a movable optical element, a motor, an image sensor and a processing unit. The autofocus procedure ...

Beer-Lambert law

Beers law states that the optical density of a solution is directly proportional to the concentration of the solution. Lamberts law states that the optical density of a colored solution is directly proportional to the path of light.

Bifocals

Bifocals are eyeglasses with lenses that are split between two different strengths. Usually the lower half of each lens is made to help the wearer read, while the upper one is to help the wearer see at a distance.

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Pino - logical board game which is based on tactics and strategy. In general this is a remix of chess, checkers and corners. The game develops imagination, concentration, teaches how to solve tasks, plan their own actions and of course to think logically. It does not matter how much pieces you have, the main thing is how they are placement!

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