Materials Literature
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Japanese R65 rail is metallographically analyzed after operation in the East Siberian Railroad. Its chemical composition complies with Technical Specifications TU 0921-239-01124323–2007 for the steel used in the production of 350LDT rail. The macrostructure of the metal is of satisfactory quality. The tensile mechanic…
Structural and dynamic analysis based on combined thermophysical and molecular-mobility measurements via spin-probe ESR spectroscopy has been applied to films
In this paper, an fuzzy approximator based output feedback adaptive dynamic surface inverse control (DSIC) scheme is proposed for a class of time-delay systems preceded by unknown asymmetric hysteresis. The main advantages are as follows: 1) by combining the Finite Covering Lemma with fuzzy logic systems (FLSs), a nov…
This study presents a numerical investigation on the proton exchange membrane fuel cell (PEMFC) and the solid oxide fuel cell (SOFC), using the aerothermal and electrochemistry equations to describe all phenomena included in both types of the fuel cells. The computational process is based on the implementation of the…
The quality of welded pipe (diameter 508–1420 mm; wall thickness 8–48 mm) of strength class up to K80 (X100) is investigated. Plastic shaping is simulated, with quantitative estimation of the stress–strain state of thick-walled pipe blanks in TESA 1420 presses during edge bending and stepwise shaping. The correspondin…
For the first time, we propose a one transistor nonvolatile memory which can solve the long time charge loss issue incurred in the conventional nitride-storage cell, a hurdle to the scaling of SONOS memory. The SONOS cell uses charge as the storage, while the new invention discloses a cell with one transistor and the…
Multiple genes encoding putative PHB synthases (up to 5 in single strain) were found in Methylobacterium genomes. As a result of phylogenetic analysis proteins PhaC1, PhaC2, PhaC3 were identified as class I PHB synthases, PhaC4 proteins were identified as class III PHB synthases, while PhaC5 apparently belongs to unch…
The ability of wild-type strain Cupriavidus eutrophus B10646 to synthesize copolymers containing 3-hydroxy-4-methylvalerate (3H4MV) [P(3HB/3HV/3H4MV)] was studied. The possibility of synthesis of terpolymers containing 3HB, 3HV and 3H4MV monomers using glucose, or butyric acid and co-substrate was shown. A family of c…
Metal drop samples are taken during plasma–arc remelting of 12Kh25N16G7AR steel billets. An analysis of the drops shows that the fraction of steel nitriding in the drops accounts for 20–40% of the total steel nitriding at a nitrogen content of 0.06% in a billet. An equation is derived to estimate the nitriding of a li…
This In this paper we present a method to determine the current density inside an aluminum plate subject to a eddy current testing procedure to determine the existence of surface cracks. The general idea consists in generating eddy currents in the plate, which in the case of flawless material, must be of uniform densi…
Radiationless relaxation in hybrid systems quantum dot (QD)–plasmonic nanostructure is considered. For the system QD–2D plasma the relaxation rate extremely steeply depends on the radius of quantum dot while in the pair QD–cylindrical wire contacting each other this dependence is logarithmic weak.
10646 was conducted. Different modes differently affect the yield of the product (polymer) and its physicochemical properties (molecular weight distribution and temperature characteristics). High temperatures caused the polymer degradation and decrease of its molecular weight. Using freeze drying allows to obtain fria…
We report a thorough investigation of the electrically-induced metal-insulator transition in vanadium dioxide (VO2) for abrupt switching in 2-terminal devices (0.24 mV/dec at 25 °C, 0.38 mV/dec at 50 °C). We exploit the electrothermal actuation model based on Joule heating to model and predict the low temperature depe…
Abstract The characteristics of a ZnO nanorod array/TiO2 film heterojunction were investigated. A TiO2 film was prepared on glass by aqueous solution deposition with precursors of ammonium hexafluorotitanate and boric acid at 40 °C. Then, a ZnO seed layer was prepared on a TiO2 film/glass substrate by RF sputtering. A…
Layered semi-metallic materials other than graphene have not received much attention. Here, we examine electrical and thermal transport in WTe2devices by experiments, analytical and finite element simulations. We uncover that few-layer WTe2has remarkably high current density but ultra-low thermal conductivity, suggest…
We report both Raman shift and photoluminescence (PL) in Ge as a function of carrier density instead of dopant concentration. The results show both the energy band gap (Eg) and zone-centered phonon frequency are dependent on free carrier density. In the low voltage device operation, it should be taken into considerati…
In this Study, Cadmium Oxide (CdO) nanostructures were synthesized by using Chemical Bath Deposition Technique. The synthesized process was carried out at room temperature. The structural and optical properties of nanostructures was characterized by XRD, SEM and UV-Vis techniques. As a result, the CdO nanostructures a…
Nikel titanium shape memory alloys (NiTi) are promising materials due to their shape memory effect. The disadvantage of the nickel is the toxicity, there are too many restrictions on the use of the human body. Hence, if the proper surface modification is chosen, the surface of NiTi can be tranquilized and smooth. Also…
Production of small electrical machinery are among the challenging technical work. Any change in this innovative production leads to cost savings that are associated with the production process. In this follow-up to make technical changes reflected in the selling price of the product and profits. Therefore, the articl…
The commonest methods of producing carbon nanotubes are analyzed, and the main types of carbon precursors employed in carbon nanostructures are reviewed. Parameters that affect the formation of carbon nanotubes in synthesis are identified.