Some problems on the resistance method in determining the hydrogen content in PdHx electrodes are discussed. First, the resistivity ratio of PdHx , the temperature coefficient of resistivity and the resistance of PdHx , and the resistance of Pd having undergone hydriding /dehydriding cycles are discussed. It is found that the resistivity ratio is somewhat higher than the resistance ratio with t...

A kinetic priority queue is a kinetic data structure which determines the largest element in a collection of continuously changing numbers subject to insertions and deletions. Due to its importance, many different constructions have been suggested in the literature, each with its pros and cons. We propose a simple construction that takes advantage of randomization to achieve optimal locality an...

Significant heat transfer issues associated with four alternative hydrogen storage methods are identified and discussed, with particular emphasis on technologies for vehicle applications. For compressed hydrogen storage, efficient heat transfer during compression and intercooling decreases compression work. In addition, enhanced heat transfer inside the tank during the fueling process can minim...