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The theoretical advantages that Silicon Carbide (SiC) material offers are being realized by using prototype or experimental devices in many different applications ranging from medium voltage to high voltage. The main advantages of using SiC based devices are reduced thermal management requirements and smaller passive components which result in higher power density. An overview of the SiC resear...
Partial differential equations are used to describe physical phenomena in many science and engineering fields. Finite differencing methods map these continuous equations into discrete space so that they may be solved on computers. Co-Array Fortran provides the means for implementing such solution methods in parallel processing computing environments. In this report we describe our experiences w...
Last year, Oak Ridge National Laboratory received delivery of a 5,294 processor Cray XT3. The XT3 is Cray’s third-generation massively parallel processing system. The system uses a single-processor node built around the AMD Opteron and uses a custom chip—called SeaStar—to provide interprocessor communication. In addition, the system uses a lightweight operating system on its compute nodes. This...
Neutron scattering has been a very powerful probe in the research to the lattice and magnetic structures of various kinds of materials now. In this paper, I will first give a brief introduction of the history of neutron scattering. Then, in the second part, I will talk about the properties of neutron scattering, present its basic mechanism and unique properties. After that, I will give some exa...
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