4/8/2004:

Intermediate Word:  sortilege  (a) diversified collection  (b) conspiring against while feigning loyalty  (c) sorcery  (d) vandalism
Difficult Word: - indaba  (a) African tribal conference  (b) insect in molt phase  (c) declaration of peace between tribes  (d) type of ox collar


The Myth of Low-Thrust Propulsion - SpaceDaily  Unfortunately, from the rumors and news stories reaching my computer, it seems that many of these designers are wasting their time on ideas that are fundamentally unworkable and would only wreck Plan Bush in the unlikely event that they were actually adopted by NASA. Prominent among these unworkable notions is the idea of low-thrust Nuclear-Electric Propulsion. The problem here is than any performance increase due to the benefits of scale will start from a ludicrously low base. JIMO will weigh about 20 tons upon injection into LEO, and its thrust is so low that it will take 2.5 years just to climb up out of the Earth's gravity well and pass the Moon! 
Ethanol To Power Hydrogen Fuel Cells - SpaceDaily  Hydrogen fuel cell technology's potentially strong future as a fuel for automobiles and various other applications is likely to be weakened by issues regarding its availability and the expenses involved in storage. Bio-based products such as ethanol are expected to open up new areas for research. Conversion of biomass materials such as ethanol into hydrogen is a more cost-efficient method to power fuel cells. Researchers believe that inter-metallic compounds could be used beneficially in fuel cell electrodes to oxidize ethanol. 

Chemists Describe New Nanotube Transistor - SpaceDaily  Duke University researchers exploring ways to build ultrasmall electronic devices out of atom-thick carbon cylinders have incorporated one of these "carbon nanotubes" into a new kind of field effect transistor. However, other groups have found that this back gate of silicon, which is "doped" with other chemicals to fine-tune its electronic properties, is poorly coupled with the rest of the device. The result is excess power demand. "To turn the device from off to on, you need five to ten volts," Liu said in an interview. To address this shortcoming, teams at two other universities have found they can reduce the power demand to between 0.3 and 0.5 volts by adding an additional gate made of a tiny droplet of salty water.





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