To successfully exploit the benefits of optical technology in a tightly-coupled multicomputer, the architectural design must reflect both the advantages of optics and the limitations of optics. This paper describes a class of such architectures, based upon inverted graph topologies. Two instances of this class (an inverted hypercube and an inverted mesh) are further explored to illustrate their...

|In this paper, the authors use the adaptive integral method (AIM) to simulate the electromagnetic scattering from large complex PEC objects. The ­ rst problem that we have investigated is the scattering from a dihedral corner re®ector that may lead to a better understanding of scattering mechanisms and properties of more complex geometries. The second problem investigated is scattering from a ...

Cosmology and other scientific results from the WMAP mission require an accurate knowledge of the beam patterns in flight. While the degree of beam knowledge for the WMAP one-year and three-year results was unprecedented for a CMB experiment, we have significantly improved the beam determination as part of the five-year data release. Physical optics fits are done on both the WMAP is the result ...

Chenli Gan, Yanpeng Zhang,* Zhiqiang Nie, Yan Zhao, Keqing Lu, Jinhai Si, and Min Xiao Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA State Key Laboratory of Transient Optics and Technology, Xi’an Institute of Optics and Precision Mec...

Introduction: Oxygenated water intake can increase cell death markers by increasing free radicals; however, sport activities and antioxidant substances can prevent some symptoms of free radical production. The purpose of this study was to investigate the effect of endurance training (ET) and purslane (portulaca oleracea) seed (PO) consumption on cytochrome-C and malondialdehyde...

It is well known in B-scan ground penetrating radar (GPR) imagery that the underground scatterers generally exhibit defocused, hyperbolic characteristics. This is mainly due to the data collection scheme and the finite beam width of the main lobe of the GPR antenna. To invert this undesirable effect and obtain focused images, various migration or focusing algorithms have been developed. In this...

The purpose of this study was to assess the Record Power Profile (RPP) of cyclists, i. e., the relationship between different record Power Output (PO) and the corresponding durations through a whole race season. We hypothesized that PO of different effort durations could differ according to the cyclist's category and race performance profile. 17 cyclists (9 professionals and 8 elites) performed...

In this paper, we first consider (po-)torsion free and principally weakly (po-)flat $S$-posets, specifically  we discuss when (po-)torsion freeness implies principal weak (po-)flatness. Furthermore, we give a counterexample to show that Theorem 3.22 of Shi is incorrect. Thereby we present a correct version of this theorem. Finally, we characterize pomonoids over which all cyclic $S$-posets are ...

In this work we examine the use of ray-transfer matrices for teaching and for deriving some topics in a Fourier optics course, exploiting the mathematical simplicity of ray matrices compared to diffraction integrals. A simple analysis of the physical meaning of the elements of the ray matrix provides a fast derivation of the conditions to obtain the optical Fourier transform. We extend this der...