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J. B. Friauf
James Byron Friauf (1896 1972) was an American electrical engineer who first determined the crystal structure of Magnesium zincide, MgZn2 in 1927. Friauf was a professor of physics at the Carnegie institute of technology, Carnegie Institute of Technology, now Carnegie Mellon University. He had received training in the determination of the structure of crystals as a student at California Institute of Technology where he studied with Roscoe Gilkey Dickinson. The structure Friauf discovered consists of intra-penetrating icosahedron, icosahedra, which coordinate the Zn atoms, and 16-vertex polyhedron, polyhedra that coordinate the Mg atoms. The latter type of polyhedron is called a Friauf polyhedron and is, actually, an inter-penetrating tetrahedron and a 12-vertex Truncation (geometry), truncated polyhedron. MgZn2 is a member of the largest class of single intermetallic structures, since referred to as the Laves phases, the Friauf phases, or the Laves–Friauf phases. Publications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Engineer
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use. Electrical engineering is now divided into a wide range of different fields, including computer engineering, systems engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, photovoltaic cells, electronics, and optics and photonics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics/control, and electrica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
