A method for uniquely describing closed, fully triangulated, boron polyhedra with 4-24 vertices based on currently accepted procedures for numbering of coordination and boron polyhedra is proposed. Minor refinements and extensions to the numbering principles for closed polyhedra are suggested. more than one polyhedral structure for each [B"H"]2" composition. Therefore, the descriptive prefix "clovo",3 later modified to "closo-",4 derived from the Greek word for cage, ß , was sufficient to identify these polyhedral structures and to distinguish them from the nonclosed, or open, polyboron hydride structures already known.5The development of metallopolyboron chemistry has led to a need for a more extensive and definitive method for describing closed polyhedral structures. Incorporating metal atoms into polyboron hydride systems substantially increased the variety of closed polyhedral structures. Metallopolyboron chemistry led to the preparation of polyhedra with more than 12 vertices, the so-called supraicosahedra,6,7 which, in turn, stimulated postulation of much larger polyhedra, containing as many as 32 vertices.8 New structures for polyhedra with less than 12 vertices were also found in metalloboron systems.9(1) (a) Chemical Abstracts Service, (b) The University of Chicago; Camille and Henry Dreyfus Teacher-Scholar.(2) M. F.
Industrial applications are every more quality, efficiency and operational av rotating machines. Therefore, monitoring quantities from a synchronous motor's or gen transmitting this data via wireless commun desirable for monitoring operating condition critical failures. Analysis of rotor operation th derived from assumptions and deduct measurements external to the machine can n with this new technology. This paper discusses the use of this tech data collected on the rotor of an electrical ro wireless telemetry, demonstrating how crucia technology is for event analysis in large sy for industrial applications.
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