Materials Literature
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The performance is reported of a programmable, two-level, phase-only device based on a commercially available 128 × 128 pixellated, ferroelectric liquid crystal spatial light modulator. Near diffraction limited performance is achieved and results for a Dammann grating are comparable to those obtainable with fixed comp…
In the present paper nonlinear evolution of disturbances at the meniscus between parallel circular plates is simulated by a boundary element method. To simulate accurately such a nonlinear phenomenon, the thickness of liquid remaining on the plates is obtained numerically against the low capillary number Ca<1.0, which…
For military and aerospace applications, temperature is one of the more important environmental influences on optical systems. For example, some systems are required to operate over a temperature range of -30°C to 50°C. However, little has been reported in the open literature on the effects of temperature on diffracti…
from EB (O-H*) = ΔEP-EA (H+). The electron affinity of the H+ ion EA (H+) was estimated as the same of value of ionization potential of the H atom, IP (H) = 13.598eV. ΔEP is the difference of EP among the structures of II-VI; ΔEP = EP (II)-EP (III, IV, V, VI). The values (in kJ/mol) obtained of EB (O-H*) (for the stru…
In order to investigate the magnetic contributions of each iron site of Nd2Fe14B, the magnetic properties of Nd2(Fe1-xMx)14B (M=Al, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Pt) were measured, and the preferential occupation of Fe sites by M atoms was studied by Mossbauer spectroscopy. The Mossbauer spectra were analyzed by…
The molar specific heats of binary solid solutions Kr–n14N2 (n = 0.25, 0.7, 1 mol. %) and ternary solid solutions Kr–0.25%14N2 – x Ar (x = 2, 9, 24.4 mol. %) are measured in the temperature interval from 0.5 K to 6–9 K. It is established that the values and temperature dependence of the specific heat ΔC associated wit…
各種ポリマーブレンドにカーボンブラックを充てんさせ, 電気伝導度の温度変化を測定し, 偏在によるCBの濃縮と偏在相の連続性及び各ポリマーブレンドの熱的性質から電気伝導度の温度依存性を検討した. HDPE/PPの系では, CBはHDPE相に遍在し, HDPE相内では比較的に均一に分布する. HDPE/PMMAでは, CBは主にHDPE相の界面に比較的多く凝集する. 粒子の偏在による導電性の向上と電気伝導度の温度変化の減少は, 偏在相HDPEのブレンド比と偏在相HDPE内のCBの分散状態に依存する. HDPEのブレンド比において, 偏在相HDPEが連続相を形成するしきい値が存在し, HDPE/PPの系では, 電気伝導度の温度依存性はH…
楕円体粒子分散ミクロ組織モデルで記述できる多相混合系を対象として, “等価介在物法” に粒子間相互作用の効果を考慮するための “平均場近似” を取り入れた有効熱伝導率推定法について詳述し, Hashin-Shtrikmanの上・下界, マックスウェルの式および “有効媒体近似” による結果との比較を通じて本アプローチの特色を明らかにする.
Equilibrium experiments were performed to determine thermally stable ranges of SrO⋅2FeO⋅8Fe2O3(SrW) and SrO⋅FeO⋅7Fe2O3(SrX) compounds under various oxygen partial pressures. The existence of SrO⋅eO⋅7Fe2O3(SrX) compound was first verified in the present work.Upper limits of the stability ranges for SrW and SrX compound…
The hybrid material in this paper has been built up from many thin aluminum alloy and unidirectional CFRP layers. As a result of the different thermal expansion coefficients of aluminum alloy and CFRP layer, the residual thermal stresses are present after cooling down from the curing temperature to room temperature. T…
Abstract Graphite components of a High Temperature Gas-Cooled Reactor (HTGR) core will be subjected to fast neutron irradiation-induced damages causing changes in engineering properties which are dependent significantly on irradiation temperature and neutron fluence. A Graphite Damage Model (GDM) elaborated to interpr…
A modern saw-type gin stand was modified by installing a motor-driven auger in the seed-roll box. Seed cotton was fed continuously into the left one-third of the gin stand, partially ginned, and the auger moved the cotton along the roll box to the right side of the gin stand. The seed cotton was completely ginned as i…
Ways of manufacturing silica glass blanks with a homogeneous refractive index (n) distribution by appropriately distributing the OH-group and Cl were discussed. First, the effect of fictive temperature, which was considered to be set in the cooling process of stress relief annealing, was estimated. Then, the effects o…
New sesquisulfides of the lanthanides with the U 2 S 3 -type structure (M 2 S 3 , M = Tb and Dy) were prepared through the oxidation of TbClH 0,67 and DyCl 2 , respectively, with appropriate amounts of sulfur in the presence of NaCl fluxes in silica protected sealed tantalum containers at 850 °C for at least seven day…
The spectroscopic model of a doping center - Cr4+ ion, occupying tetrahedral site of YAG-lattice (Cr4+) is developed by the polarizing spectroscopy investigations of Cr,Me2+-doped YAG single crystals and the calculation of energy levels for an electron configuration d2 in a crystal field of Dzd point group symmetry. N…
The design and construction of a circuit using Hg-wetted relays to deliver a high current (1 A) at high amplitude (+or-50 V) with short pulse rise and fall times (>
Strength measurement under tensile stress and analysis of fractured surfaces were conducted for single SiC fibers heat-treated at 1300° C from a tension test. The tensile strength of the heat treated fibers was reduced by 45% compared with as-receive fibers. Pits are formed on the fiber surface during heat-treatment a…
Quantitative measures of the time required for effective ergodicity to be realized in a dynamical system are developed and applied to computer simulations of strongly supercooled Lennard‐Jones fluid mixtures. The techniques employed are generally applicable to the study of ergodic‐nonergodic transitions and can also b…
This review summarizes the published theoretical and experimental studies of Csl radiolysis in an operating fuel pin. The calculation method, which has been developed based on gas kinetic theory, is effective for the evaluation of the radiation effect on iodine pressure. The iodine partial pressures, which were calcul…
Experiments with Mixtures. By J. A. Cornell. ISBN 0 471 52221 X. Wiley, Chichester, 1990. 632 pp. £47.50.