Materials

Some articles on materials, material:

Drill Bit - Characteristics - Materials
... Many different materials are used for or on drill bits, depending on the required application ... Many hard materials, such as carbides, are much more brittle than steel, and are far more subject to breaking, particularly if the drill is not held at a very constant angle to the ... conferred by hardening and tempering the material ...
Organic Field-effect Transistor - Materials
... One common feature of OFET materials is the inclusion of an aromatic or otherwise conjugated π-electron system, facilitating the delocalization of orbital wavefunctions ... OFETs employing many aromatic and conjugated materials as the active semiconducting layer have been reported, including small molecules such as rubrene ... Many review articles exist documenting the development of these materials ...
Wide Bandgap Semiconductors - Material Properties - Bandgap
... coulombic potential determines the bandgap of a material, and the size of atoms and electronegativities are two factors that determine the bandgap ... Materials with small atoms and strong, electronegative atomic bonds are associated with wide bandgaps ... periodic table are more likely to be wide bandgap materials ...
Bow (music) - Materials and Manufacture
... A bow consists of a specially shaped stick with other material forming a ribbon stretched between its ends, which is used to stroke the string and create sound ... is the ability to choose high quality material for the stick ... by international treaty, so makers are currently adopting other materials woods such as Ipê (Tabebuia) as well as synthetic materials ...
Obscene Publications Act 1959 - Impact and Assessment
... sting" operations where the police purchased "obscene" materials were not considered sufficient evidence of publication, since the police were not considered easy to "corrupt" due to their regular exposure to the ... Secondly, the offer of such materials for sale was not held to be publication, since it was merely an invitation to treat ... publication or sale" and also extended "obscene materials" to cover photograph negatives ...

Famous quotes containing the word materials:

    In how few words, for instance, the Greeks would have told the story of Abelard and Heloise, making but a sentence of our classical dictionary.... We moderns, on the other hand, collect only the raw materials of biography and history, “memoirs to serve for a history,” which is but materials to serve for a mythology.
    Henry David Thoreau (1817–1862)

    Herein is the explanation of the analogies, which exist in all the arts. They are the re-appearance of one mind, working in many materials to many temporary ends. Raphael paints wisdom, Handel sings it, Phidias carves it, Shakspeare writes it, Wren builds it, Columbus sails it, Luther preaches it, Washington arms it, Watt mechanizes it. Painting was called “silent poetry,” and poetry “speaking painting.” The laws of each art are convertible into the laws of every other.
    Ralph Waldo Emerson (1803–1882)

    Our job is now clear. All Americans must be prepared to make, on a 24 hour schedule, every war weapon possible and the war factory line will use men and materials which will bring, the war effort to every man, woman, and child in America. All one hundred thirty million of us will be needed to answer the sunrise stealth of the Sabbath Day Assassins.
    Lyndon Baines Johnson (1908–1973)