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Meteoritic zircons are rare, but some are documented to occur in asteroidal meteorites, including those of the howardite–eucrite–diogenite (HED) achondrite clan (Rubin, A. [1997]. Meteorit. Planet. Sci. 32, 231–247). The HEDs are widely considered to originate from the Asteroid 4 Vesta. Vesta and the other large main belt asteroids record an early bombardment history. To explore this record, we describe...
People looking for solutions to global warming and rising energy costs may see solar and wind energy as a high-risk low-reward solution. The aim of this research is to develop a Monte-Carlo based method for determining an expected amount of energy production for these types of systems and to test this method on one type of system.
Development of EHV three conductor SF6 insulated transmission systems has progressed to the stage where a field demonstration has been initiated. Details of 362 kV transmission system design and manufacture are presented. The 180 m (600 ft) buried and above ground test loop design, field installation and instrumentation systems are detailed. A long term test program is outlined. Further developments...
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