Materials Literature
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The local density of states (LDOS) around two nonmagnetic impurities which are located at different sites is studied within the two-dimensional t-J-U model. The order parameters are determined in a self-consistent way with the Gutzwiller projected mean-field approximation and the Bogoliubov-de Gennes theory. When the…
We have investigated the magnetic and electrical properties of multiferroic BiFe 1-x Mo x O 3 ceramics ( BFMO , x = 0.0%, 0.2%, 0.5% and 0.8%) prepared by the sol–gel method. The phase structure of BFMO samples were confirmed by X-ray diffraction. It was found that the substitution of Mo is responsible for the increas…
Nanocomposites of reduced graphene oxide and manganese (II,III) oxide can be synthesized by the freeze-drying process of the mixed colloidal suspension of graphene oxide and manganese oxide, and the subsequent heat-treatment.The calcined reduced graphene oxide-manganese (II,III) oxide nanocomposites are X-ray amorphou…
We measure foreign exchange exposures as sensitivity of firm's value to FX premium in the CAPM plus FX premium model, and try to find determinants of the exposures; using data of non-financial companies listed in the Korea Exchange from the year 2007 to 2008. Main findings are as follows. If Korean won depreciates, on…
In the prediction of formability of sheet metals, it is necessary to determine material properties which are normally evaluated on the data obtained by performing simple tests. The most important parameters affecting the value of limit strains of a sheet metal are the strain hardening exponent (n) and plastic anisotro…
The Ni-rich corner of the 1200 ºC isothermal sections of both the Ni-Al-Cr and Ni-Al-Mo ternary phase diagrams were obtained using diffusion multiples together with SEM imaging and electro-probe microanalysis (EPMA).In the Ni-Al-Cr system, composition regions of both the Cr-based bcc phase and the β-NiAl phase were ob…
Material of electric locomotive railway axle – the OSL steel – after 20 years of service was investigated. Since in the process of exploitation of railway axle fatigue cracks are initiated on its surface and grow in radial direction, specimens were cut in axial direction. Specimens for determination of toughness were…
This experimental design and response surface methodology (RSM) have been applied to the investigation of the electro-UV-ultrasonic complex process for the disinfection of E. coli in the water.The disinfection reactions of electro-UV-ultrasonic process were mathematically described as a function of parameters power of…
Nano-sized manganese ferrite powders and films, $MnFe_2O_4$ , were fabricated by the sol-gel method, and the effects of annealing temperature on the crystallographic and magnetic properties were studied by using X-ray diffractometry, field emission scanning electron microscopy, M $\"{o}$ ssbauer spectroscopy, and vibr…
Abstract Summary: Experimental data are discussed challenging the deterministic kinetics of emulsion polymerization. Examples are given for the overall rate of polymerization, in‐situ stabilizer formation, and swelling of latex particles. Improving the deterministic view on emulsion polymerization kinetics requires th…
We have prepared siloxane polymers grafted with trifluoromethane-sulfonylamide and oligoether side chains for solid polymer electrolytes with enhanced ionic conductivity.The grafted trifluoromethane sulfonylamide groups seem to be effective as an anion recepting site to enhance the ionic conductivity of the solid poly…
Abstract Formation and growth of the title nanocrystals in high‐temperature, high‐pressure aqueous KOH solutions of Fe(NO3)3 and Bi(NO3)3 is monitored by in situ synchrotron powder XRD.
Abstract Rheological properties of poly (ethylene‐acrylic acid) (PEA) and low density poly ethylene (LDPE) blends having varied amounts of LDPE from 0 to 100% have been evaluated at different temperatures (115, 120, and 130°C) and shear rates (61.33–613.30 s−1) using a Monsanto processability tester. A reduction in th…
Abstract Summary: Linear poly (ethylene‐co‐1‐butene) was produced through two‐step polymerization in one reactor using a Ziegler‐Natta catalyst, where in the first step, low molecular weight homopolymer of ethylene in the presence of hydrogen and in the next step, high molecular weight copolymer of ethylene with 1‐but…
The photoemission cross section of the $1\ensuremath{\pi}{}^{\ensuremath{-}1}$ state shows a significant resonance at a photon energy of $h\ensuremath{\nu}=33$ eV, which so far has not been observed in gas-phase measurements nor on surfaces of other transition metals. The occupied electronic states of CO adsorbed on t…
Grafting of poly (methyl methacrylate) (PMMA) onto styrene–butadiene–styrene (SBS) triblock copolymer (SBS-g-PMMA) was synthesized by atom transfer radical polymerization (ATRP). The hydroxylated SBS (SBS-OH) was synthesized firstly by the reaction of SBS and formic acid/peroxide hydrogen. After esterification reactio…
A series of hydroxycalix[4]arenes bearing one, two, or four fragments of methylenebisphosphonic acids was synthesized by the reaction of appropriate formylcalixarenes with sodium salts of dialkylphosphites. These calixarenes inhibit specifically 50% of fibrin polymerization in the fibrinogen + thrombin reaction as wel…
We propose a solution for obtaining a 2-face viewable liquid crystal display (LCD) that is able to show different images on the same screen depending on the viewing perspectives. Without requirement for any extra optical component, this function is simply realized by a 2-domain vertically aligned (VA) liquid crystal (…
The paper presents the results of the investigation of the influence of forming semi-products by the methods of severe plastic deformations (SPD), such as: equal-channel angular pressing (ECAP) or hydrostatic extrusion (HE) on the mechanical properties of aluminium as well as 5483 and 7475 alloys. Plasticity of the ma…
한국과 대만은 경제위기 이후 가족을 포함한 사적 영역의 급격한 구조적 변화를 맞이하였다. 사적 영역의 변동을 보여주는 여러 현상들 가운데, 본 논문은 양국의 1인 가구의 증가에 주목한다. 두 사회에서 유사한 시기에 전개된 후기산업사회로의 전환, 동시에 이러한 전환을 가속화시킨 경제위기, 그 결과 대두된 노동시장의 변동(실업문제) 등의 조건에서, 1인 가구가 현저하게 증가한다. 동아시아의 역사적 유산으로서 가족주의 이데올로기가 비교적 강고하게 유지되어왔던 두 사회에서, 1인 가구의 급속한 증가는 단순히 경제문제, 인구문제를 넘어서, 규범적인 차원에서 전통적인 가족 가…