Materials

Some articles on material, materials:

Wide Bandgap Semiconductors - Material Properties - Bandgap
... of the 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 ... Elements high on the periodic table are more likely to be wide bandgap materials ...
Obscene Publications Act 1959 - Impact and Assessment
... operations where the police purchased "obscene" materials were not considered sufficient evidence of publication, since the police were not considered ... Secondly, the offer of such materials for sale was not held to be publication, since it was merely an invitation to treat ... obscene articles for publication or sale" and also extended "obscene materials" to cover photograph negatives ...
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 ... exist documenting the development of these materials ...
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 workpiece, e.g ... bits due to the properties conferred by hardening and tempering the material ...
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 ... of the bowmaker's skill is the ability to choose high quality material for the stick ... regulated by international treaty, so makers are currently adopting other materials woods such as Ipê (Tabebuia) as well as synthetic materials ...

Famous quotes containing the word materials:

    Though the hen should sit all day, she could lay only one egg, and, besides, would not have picked up materials for another.
    Henry David Thoreau (1817–1862)

    Realism to be effective must be a matter of selection. ... genius chooses its materials with a view to their beauty and effectiveness; mere talent copies what it thinks is nature, only to find it has been deceived by the external grossness of things.
    Julia Marlowe (1866–1950)

    Young children learn in a different manner from that of older children and adults, yet we can teach them many things if we adapt our materials and mode of instruction to their level of ability. But we miseducate young children when we assume that their learning abilities are comparable to those of older children and that they can be taught with materials and with the same instructional procedures appropriate to school-age children.
    David Elkind (20th century)