Materials Literature
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The number density of particles was estimated regarding to the high strength steels containing non-spherical shaped precipitates with various size. The shapes of particles were evaluated by modeling based on the experimental results obtained by transmission electron microscopy. When the spatial degrees of freedom of p…
Tensile testing of a diamond-like carbon (DLC) thin film was carried out by using the originally developed nano-materials testing system (NTS) that consisted by a nano-materials tester and a scanning electron microscope. This experiment is the first step for the formation of graphene by stress-induced transformation o…
The shaping of the wavefront of light with optical components such as lenses and prisms, as well as diffractive elements, such as gratings and holograms, relies on gradual phase changes accumulated along the optical path. This approach is generalized in transformation optics [1, 2], which uses metamaterials to bend li…
Cubic sesquioxides are excellent host materials for various trivalent rare earth ions emitting in the 1, 2, and 3 µm wavelength range. In this contribution we review the state of the art of Yb3+-, Tm3+-, Ho3+-, and Er3+-doped Lu2O3 lasers emitting in the near- and mid-infrared spectral range.
The effect of hetero-template grains on texture development in Bi4Ti3O12 (BiT) was examined. The hetero-template was SrBi8Ti7O27 (S0.5BT) grains with a large platelike shape. Texture developed in pure BiT made by solid-state reaction without template grains. The origin of texture development was attributed to the grow…
A polymer electrolyte membrane fuel cell (PEFC) with a porous-flow-field separator has been proposed as an alternative to cells with gas flow channels. In this study, basic characteristics of a PEFC with porous flow field were identified using a cell allowing local current density measurement and direct observation of…
This article is told about obtaining exact analytical solutions of the thermoelasticity problem for multilayer construction and also contains its algorithm when elastic properties of each layers were constant. As an example was solver specific problem for double layer hollow cylinder with set load at the inner surface…
This paper discusses modeling of spreading nematic liquid crystal films. We concentrate on gravity driven spreading and consider various instabilities which occur during the spreading. We find that nematic character of the spreading film leads to stronger instabilities of the film fronts, and that it also leads to sur…
This paper presents further formulation details of an implemented hybrid fault diagnosis method for unbalanced underground distribution systems (UDS). The proposed formulation is hybrid approach based, using both artificial neural networks (ANNs) and wavelet transforms (WTs) for the fault diagnosis process. Traditiona…
In this paper we introduce a bubble break-up criterion based on Rayleigh-Taylor instability where the number of fission fragments is taken as a free parameter. Consequently, we identify the bubble break-up time, prior to the time where the minimum volume during the collapse period is achieved, utilizing the most unsta…
A novel and new copolymer of 3-aminopropyltriethoxysilane (APTES) on epoxided ethylene- propylene-diene terpolymer (eEPDM) via Sol-Gel Process. EPDM was epoxidized with an in situ formed per formic acid to prepare epoxided EPDM (eEPDM).The effect of eEPDM concentration, APTES concentration, reaction time and reaction…
Cellulose, a linear β-1,4-linked-homoglucan polymer, is the most abundant organic molecule in the biosphere and attracted fiber for an advanced functional materials. Cellulose-synthesizing organisms are widely distributed in biological kingdoms, ranging from Monera to Plantae and even to Animaria, tunicates. In this c…
timing multifunctional oscillator (
In this paper, we define the radial signed digraph −→R(Σ) of a given signed digraph Σ = (â, σ) and offer a structural characterization of radial signed digraphs. Further, we characterize signed digraphs Σ for which: Σ ∼ −→R(Σ) and Σ ∼ −→R(Σ) where ∼ denotes switching equivalence and −→R(Σ) and Σ are denotes the radi…
非接触で電気化学的な電位分布を測定可能な表面電位測定により，塗装鋼板の劣化評価を行った。塗膜下腐食を模擬したモデル試料の表面電位測定を行った結果，実際の劣化とほぼ同じ面積の劣化部が検出され，塗膜下においても劣化を検出できることがわかった。塗装鋼板を劣化させるため，0.5M NaCl水溶液の液滴下で乾湿繰り返し腐食試験が行われた。乾湿繰り返し腐食試験により劣化させた塗装鋼板の表面電位分布は3サイクル後，変化した。塗膜の劣化部は乾湿繰り返しサイクル数とともに大きくなり，10サイクル後，腐食試験で用いた液滴のサイズとほぼ同じ大きさになった。表面電位測定は塗装鋼板の劣化を非破壊で評価する手法として，有用であることがわかった。
Институт гидродинамики им
This paper deals with the method of partial discharge (PD) detection with the sensor (antenna) put at the outside of the GIS tank. The flange of the spacer is paid attention as a leakage place of the UHF from the PD. Three kinds of antennas are proposed and made for trial purposes. And one commercial antenna is select…
Ferroresonance is a nonlinear resonance, which may cause overvoltages in the electrical power system. This paper studies the effect of circuit breaker shunt resistance on the control of ferroresonance in a voltage transformer while the core losses of the VT core are highly nonlinear. It is expected that this resistanc…
Aquifer vulnerability is a key issue in groundwater resource management. The airborne TEM method has demonstrated the potential to provide detailed information about the shallow subsurface resistivity distribution to constitute a valid background for vulnerability estimation. Combined with its ability to delineate aqu…
Monolayer detection on metal surface requires ultra high sensitivity. Sum Frequency Generation Spectroscopy (SFG) and Surface Enhanced Raman Spectroscopy (SERS) are regarded as two powerful techniques with submolecular sensitivity to detect adsorbents on metal surface. However, in some cases it's still challenge to ch…