Materials Literature
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Soft X-ray spectroscopy was applied to study a calcium bentonite from the Kutch area in India. We recorded the X-ray absorption spectra from the L-edge of calcium, silicon, and aluminum, and from K-edge of oxygen. The Ca absorption spectrum shows a quasi-atomic behavior, while the Si spectrum closely simulates the abs…
Bone is a very active and dynamic tissue that is constantly remodelled in response to mechanical stress and hormonal stimuli. The cells of the bone are capable of restoring bone defects and fractures in their original state. However, in certain circumstances, the spontaneous repair process is hampered, resulting in no…
Different grades of CaCO 3 used for testing the growth of volariella volvacea. The result indicated that French chalk should not be used for spawn production. Pharmaceuticals grade is recommended for spawn production because its cost is 3times lesser that that of lab reagent grade CaCO 3
Current technology of thermal barrier coating systems used in gas turbine blade applications relies upon the use of a metallic bond coat, which has a two-fold function: i) it develops a thin layer of aluminum oxide enhancing the adhesion of the ceramic top coat, and ii) it provides an additional resistance to oxidatio…
Experimental structures of two dimethoxymethane/oxygen/argon flames at equivalence ratios of = 0.24 and 1.72 have been studied by mass spectrometry. The detected species throughout the flame thickness were H2, CH3, CH4, H2O, C2H2, CO, CH2O, CH3O, O2, Ar, CO2, C2H4O2, and C3H8O2. The aim of this work was to extend an o…
p型とn型の熱電素子を直接接合した構造の温度変化センサ(熱電温度変化センサ)を提案し，試作した．試作したセンサの熱電素子には，高いゼーベック効果がある放電プラズマ焼結法で作製したβ-FeSi2系熱電半導体を用いた．この熱電温度変化センサの特性を評価するため，センサを室温から温度差のある恒温水槽へ投入したときのセンサからの起電力を測定し，温度差と起電力との相関関係から温度変化センサとして機能することを確認した．このとき，約30Kの温度差に対して，約5mVの最大起電力が得られた．さらに，熱電温度変化センサの特性を数値解析によって，熱電素子の長さや直径などの形状の依存性とゼーベック係数や熱伝導率，密度，比熱などの物性値の依存性を明らかに…
Surface structures of rutile TiO2(114) have been studied by a combination of scanning tunneling microscopy (STM) and density functional calculations. Depending on the surface preparations, the surface exhibited various complicated structures. Microfaceting structural models can explain the experimental results very we…
The rheological properties and phase transition of cornstarch with low moisture content under shear stress was investigated using a mixer with twin-roller rotors by the variation of torque as functions of temperature and time. Cornstarches with different AM/AP ratios (wx: 4:96, maize: 29:71, Gelose 50: 62:38, and Gelo…
The ability to actively control the shape of aerospace structures has initiated research regarding the use of Shape Memory Alloy actuators. These actuators can be used for morphing or shape change by controlling their temperature, which is effectively done by applying a voltage difference across their length. The abil…
Plasma surface treatment posses many advantages comparing to the other wet techniques. In this work, we focused on the surface modification by introducing -COOH group into the polymer surface using surface-wave plasma. To introduce -COOH group into the surface, we added a small amount of the acetic acid (CH3COOH) vapo…
Appendix G of the ASME B31 pipeline and piping codes addresses the pressure containment capacity of pipelines and vessels with locally corroded sections. However, the ability of corroded sections to carry moment, for example in thermal loops, is not addressed in fitness-for-service codes today. This paper presents non…
A theoretical study has been performed on a hematoporphyrin and its dimers which are components of Photofrin, a photosensitizer. Full geometry optimizations have been carried out using the PBEPBE functional and 6-31 G(d) basis set. This combination gives better agreement with X-ray crystal data of porphyrin. Among the…
An important step in the initial oxidation of hydrocarbons is the abstraction of H by hydroperoxyl radical (H02). In this study, reaction rate constants are derived for H abstraction by H02 from the weakest H bond in methanol, ethenol, acetaldehyde, toluene and phenol. Rate constants are provided in the simple Arrheni…
The report deals with the computational fluid dynamic (CFD) simulation and analysis of the clothes drying using rejected heat (CDURH) drying compartment. The performance of the drying cabinet is analyzed by observing on the hot air flow and temperature distribution inside the cabinet. From the literature studies, most…
Bismuth antimony telluride has the best performance among the p-type thermoelectric materials used in the range of temperature between 300 K and 500 K. This material has a trigonal-hexagonal scalenohedral crystal structure and the cleavage parallel to the basal plane of the crystal can readily occur. Suppression of th…
We have investigated magnetic properties of atomic wires of Ga-substituted Mn on the GaAs(110) surface using first-principles calculations based on the spin-density functional theory. Mn atomic wires are assumed to align along the <110>-, <001>-, and <211>-directions. The <110>-oriented wire is most stable energitical…
ABSTRACT. The influence on the crack growth rate on a microstrucurally short edge crack, subjected to fatigue loading, due to changes in crack length, distance to grain boundaries and applied load, is investigated. The crack is assumed to grow in a single shear mechanism due to nucleation, glide and annihilation of di…
Characteristics of elements leaching from waste printed circuit boards (PCBs) was studied through sand column tests. Leaching concentrations of elements from waste PCBs increased greatly with decrease of pH. the alteration of the elements could be categorized into two kinds: one kind included Cu,Pb and Zn, which leach…
Among the Generation IV systems, Sodium Fast Reactors (SFR) are promising and benefit of considerable technological experience. However, the availability and the acceptability of the SFR are affected by the problems linked with the sodium-water reaction. One innovative solution to this problem is the replacement of th…
During decommissioning of nuclear facilities, it is generally thought that the risk is relatively low after high activity inventory such as the spent fuel is removed. However, dismantlement works may be carried out with non-multiple barriers with a non-regular process depending mainly on human activities. Moreover, fi…