Materials Literature
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Abstract Polyhydroxyalcanoates (PHAs) are specifically produced by a wide variety of bacteria, as an intracellular energy reserve in the form of homo- and copolymers of [R]-β-hydroxyalkanoic acids, depending on the C source used for microorganism growth, when the cells are grown under stressing conditions. In this pap…
Models of partial discharge (PD) activity have been used to successfully replicate PD data from experiments under controlled conditions. These experiments have typically investigated PD activity from an artificial defect, often a gaseous void, surrounded by a homogeneous dielectric material in a parallel plate electro…
This paper reports the effect of varying polymer concentration i.e. solvent/polymer ratio on the morphology and gas transport behaviour of polyethersulfone/polyvinyl acetate blend membrane. The solvent used was dimethylformamide, while the manipulated variable was polymer concentration. The concentrations were varied…
Abstract This paper concerns the problem of designing an EID-based robust output-feedback modified repetitive-control system (ROFMRCS) that provides satisfactory aperiodic-disturbance rejection performance for a class of plants with time-varying structured uncertainties. An equivalent-input-disturbance (EID) estimator…
The Li, Ta, and Sb-substituted lead-free (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 (KNLNTS) thin films were fabricated on Pt(111)/TiO2/SiO2/Si substrates using the radio frequency (RF) magnetron sputtering method. The KNLNTS thin films were annealed at 750 ◦C for 1 h in an oxygen ambient. The film with a thickness of…
The results from measuring the density and surface tension of Sn–In melts via the sessile drop method in a helium atmosphere and at a residual gas pressure of 0.01 Pa are presented. The density polytherms of all samples are linear with negative temperature coefficients. In the range of 550–750°C, the surface tension f…
Capillary action or Capillarity is the ability of a liquid to flow in narrow spaces without the assistance of, and in opposition to, external forces like gravity. Three effects contribute to capillary action, namely, adhesion of the liquid to the walls of the confining solid; meniscus formation; and low Reynolds numbe…
We report anomalous resistance leaps and drops in VO2 nanowires with operating current density and direction, showing reversible and nonvolatile switching. This event is associated with the metal–insulator phase transition (MIT) of local nanodomains with coexistence states of metallic and insulating phases induced by…
The most popular cable insulation material used is XLPE due to its excellent electrical and thermal properties. However, it does not lend itself to ease of recycling. As a result of an increase in concern worldwide regarding environmental protection, it is the objective of this work to investigate whether a thermoplas…
In this work, we show that compositionally controlled Cu 2 (Sn 1–x Ge x )S 3 nanocrystals can be successfully synthesized by the hot-injection method through careful tuning the Ge/(Sn+Ge) precursor ratio. The band gaps of the resultant nanocrystals are demonstrated to be linearly tuned from 1.45 to 2.33 eV by adjustin…
The article presents the results of experimental studies of the quality of cleaning steel surfaces by a glow discharge for plasma spraying. Shows the results of measurements of the angle of surface wetting and bond strength of the plasma coating to the surface treated. The dependence of the influence of the glow disch…
Numerous different agroecosystems (alfalfa, apple, cereals, oilseed rape, maize, sunflower fields and plantations, a pasture and a compost hill) were investigated on the basis of the soil dwelling mites in two parts of Hungary. Twenty-three species of Mesostigmata, 13 Oribatida, one Astigmata and one Prostigmata are l…
Friction-grip bolted connections are theoretically well suited for the introduction of in-plane loads in glass structures because they distribute the load over a relatively large area and thus avoid critical stress concentrations. However, the performance of friction-grip connections for laminated glass may be jeopard…
Shape‐Memory Alloys (SMAs) are a class of metal materials that exhibit two outstanding properties, the superelastic and the shape‐memory effects. Taking advantage of these properties, several SMA actuator wires and plates have been proposed over the last years in robotic, automotive, and biomedical engineering. In thi…
Dimers of nanoparticles are very interesting for several devices due to the possibility of obtaining intense light concentrations in the gap between them. A dynamic control of this interaction to obtain either the maximum or minimum light through interferential effects could be also relevant for a multitude of devices…
Cu/W multilayer nanofilms are prepared in pure Ar and He/Ar mixing atmosphere by the rf magnetron sputtering method. The cross-sectional morphology and the defect distribution of the Cu/W multilayer nanofilms are characterized by scanning electron microscopy and Doppler broadening positron annihilation spectroscopy. T…
Проведены анализ спектра собственных частот колебаний и оценка прочности под действием центробежных сил исходного и перепрофилированного лопаточного аппарата осевого компрессора стационарной газотурбинной установки, а также верификация расчетной модели в целях достижения совпадения экспериментальных данных завода
Sinusoidal Current Control strategy for extracting reference currents for shunt active power filters have been modified using Genetic Algorithm and its performances have been compared. The acute analysis of Comparison of the compensation capability based on THD and speedwell be done, and recommendations will be given…
Steel piles are known to deteriorate at high rates in Nebraska, partially as a result of exposure to weathering, and partially due to corrosive soils.The Nebraska Department of Roads employs a reinforced concrete jacket to slow the progression of corrosion and also to restore capacity to deteriorated piles.The intent…
In this paper, we theoretically analyze steady-state thermoelectric transport through a single-molecule junction with a vibrating bridge. The thermally induced charge current in the system is explored using a nonequilibrium Green function formalism. We study the combined effects of Coulomb interactions between charge…