Materials Literature
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球状強誘電体ペレット（SrTiO3（ε=330）あるいはBaTiO（ε=15,000）を充填した非平衡プラズマ反応器を用いてトルエンの分解実験を行った．SrTiO3を充填した場合の方がBaTiO3を充填した場合よりもトルエンの分解効率，NOxの生成抑制効果ともに高くなった．これらの充填剤による効率の違いを明らかにするために，オシロスコープを用いてプラズマ発生時の印加電圧波形と放電電流波形を調べた．どちらの充填剤を用いた場合も，プラズマ生成とともに数多くの放電パルスが観察された．しかしながら，最大放電パルス電流値やパルス放電電流の1サイクルでのピーク数は，投入電力が同じ場合でも充填剤によって大きく異なることが明らかになった．これらの…
This article conducted a comparative analysis on thin film transistors (TFTs) fabricated by using the excimer laser annealed (ELA) polycrystalline silicon (poly-Si) and those fabricated by using the Ni-sputtered ELA poly-Si. The grain size of the Ni-sputtered ELA poly-Si is 3 times greater than that of the ELA poly-Si…
The aromaticity and crystallite parameters in asphalt binders are calculated from data obtained after profile fitting x‐ray line spectra using Pearson VII and pseudo‐Voigt functions. The results are presented and discussed in terms of the peak profile fit parameters used, peak deconvolution procedure, and differences…
We study the chiral optical properties of three-dimensional photonic superlattices composed of polymeric helices in various spatial checkerboard-like configurations. We fabricate and characterize four arrangements of circular-spiral photonic crystals with different relative phase and handedness.
For the first time, the EPR method was used to reveal and study the special features of spin-transition processes between high-spin and low-spin iron(III) complexes with hetarylformazans immobilized on an ion-exchange polymer. An analysis of completely reversible temperature dependences of EPR line positions, widths,…
Tenaris and Centro Sviluppo Materiali (CSM) launched a Joint Industrial Project aimed at developing heavy wall line pipes. The suitability for very severe applications, involving high service pressures and temperatures, the latter causing large strain fluctuations, in presence of an aggressive sour environment, is ana…
Conducting polyaniline is unique among conducting polymers on account of its excellent optical and electronic properties. The processing of conducting polymers has attracted considerable attention owing to their possible application in molecule‐based electronic devices, such as molecular rectifiers, field‐ effect tran…
The dynamics of magnetization under the applied spin current is modeled by the generalized Landau-Lifshitz-Gilbertequation with a spin transfer torque term. Using matchedasymptotic expansion with the domain wall thickness $\epsilon$ asthe small parameter, we derive analytically the dynamic law forthe domain wall motio…
This paper presents the results of experimental investigations of natural mineral form from the PbS - Sb2S3 system. Investigated sulfosalt appears in nature in the form of nanowires with diameters ranging from 200 to 500 nm and its length can reach up to 150 mm. In most cases these nanowires are arranged like bundles,…
Large thermopower values at low temperatures are commonly observed for heavy fermion systems. Their thermopower is similarly enhanced compared to ordinary metals as the Sommerfeld coefficient of the electronic specific heat. Here, we present low- T resistivity ρ ( T ) and thermopower S ( T ) results of CeTiGe and Ce 1…
In order to extend the utilization of rice hull (RH) and the recycled plastic resins made from fishing nets, which have been drifted ashore on the coats, mechanical behavior for the composites of the resin and RH was analyzed. Fourier transformed infrared spectrometry (FTIR) and differential scanning calorimetry (DSC)…
Application of polymeric materials used for housing insulators is considered. However, because polymeric insulator is organic matter, the aged deterioration is anxious. The lifetime of polymeric insulator is influenced by environmental conditions such as ultraviolet, acid rain, and polluted deposits. A change of the s…
We present a photonic crystal high Q nanocavity realized on a single crystal diamond membrane produced by ion implantation. The cavity is patterned by Focused Ion Beam milling. The micro photoluminescence exhibits Q≈500 at λ=612nm and clear polarization dependence.
An experimental apparatus has been developed for performing shear tests on specimens held under moderately high hydrostatic pressures (up to the order of 10 GPa). This testing procedure experimentally determines the pressure dependent shear strength of thin foil specimens. This information is necessary for models of m…
Elliptical, parabolic and Wolter type glass monocapillaries were fabricated for use as x‐ray condensers in the energy range of 250 eV to 20 keV. On a routine basis a diameter error of +/−0.4 μm and straightness error of 0.8 μm (peak to valley) can be reached. The final test of condensers was performed at‐wavelength by…
粒子法は複雑な自由表面の変化の追跡に適していることから，水工学分野でも有用性が示され，海岸工学においては数値波動水槽への応用も進められている．しかし計算負荷が高いため，ハードウェアへの相応の投資が必要となり，これが一般利用の障害となっている．ところで，画像処理目的に開発されてきたGPUを，一般的な学術演算の高速化に利用する取り組みが最近活発となっている．本研究では，MPS法を高速化する手段のひとつとして，CUDAによるGPU併用コードを開発した．高速化を達成するための留意点を整理し，MPS法計算コード固有の特性に適合するように移植を行った．メモリ配置の工夫に加えて，計算のコアとなる近傍粒子探索や圧力のPoisson方程式の収束計算…
Ferroelectrets are flexible and conformable polymer transducer materials with a dominant longitudinal piezoelectric effect. They can be used in a wide range of transient pressure sensing applications. We present concepts for thin, flexible ferroelectret-keyboards (and advanced pressure sensors) based on ternary coded…
The water absorptions behaviors of the okra fibers, which are available in north east India, were studied under ambient, annealed, bleached and mercerized conditions by using ordinary gravimetric absorption method. The gains in moisture content in the fibers due to water absorption as well as their capillarity at cons…
The porous structure of two laboratory samples of hypercrosslinked polystyrene networks with a crosslinking degree of 200%, the commercial hypercrosslinked sorbent MN-270 (Purolite Int.), and macroporous polystyrene sorbents Amberlite XAD-4 and Amberlite XAD-1600 were investigated by means of 1 H NMR cryoporosimetry.…
We have studied the adsorption reaction of dimethyl sulfide (DMS) on the Rh-polyvinylpyrrolidone (Rh(PVP)) nanoparticles by using AFM, XPS and NEXAFS techniques. The AFM images show the morphology of the Rh(PVP) nanoparticles depends on the amount of them. The XPS results indicate that the dissociation reaction of DMS…