The objective of this research is to test the hypothesis that power generation in a nanoscale-gap thermophotovoltaic (TPV) device can be enhanced by a factor of 20 to 30, compared to conventional TPV systems, due to radiation heat transfer exceeding the blackbody limit. This hypothesis will be tested by measuring radiative heat fluxes and TPV performances in an experimental apparatus involving ...

The DIRAC spectrometer has been commissioned at CERN with the aim of detecting ππ atoms produced by a 24 GeV/c high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high interaction rates involved, the triggering of pion pairs with very low relative momentum, and the measurement of the latter with resolution around 0.6 MeV/c. The general character...

Korea is supposed to design, fabricate, deliver and install the ITER tritium storage and delivery system (SDS). For the successful procurement some major technologies have to be verified in the detailed design stage. Currently, have been invested the characteristics of several ZrCo storage materials, improvements of the getter beds to increase hydrogen delivery and recovery rates through small ...

High-performance cryptographic code often relies on complex hand-tuned assembly language that is customized for individual hardware platforms. Such code is difficult to understand or analyze. We introduce a new programming language and tool called Vale that supports flexible, automated verification of high-performance assembly code. The Vale tool transforms annotated assembly language into an a...

ABSTRACT MPI collective operations provide a standardized interface for performing data movements within a group of processes. The e ciency of collective communication operations depends on the actual algorithm, its implementation, and the speci c communication problem (type of communication, message size, number of processes). Many MPI libraries provide numerous algorithms for speci c collecti...