Materials Literature
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The abundance of different ions produced by laser ion sources is usually analyzed by an electrostatic ion analyzer (EIA). Ion current intensities in the range of several mA/cm(2) at the position of the EIA have been achieved from the laser ion source developed by the Institute of Modern Physics; this indicates that a…
The paper deals with analysis of influence of pressing speed, of melt temperature and of casting position in a mold upon ultimate tensile strength Rm of die casting from aluminium. The monitored parameters of die casting are very important in terms of production efficiency and quality of casting, which is positively r…
To make the solar cell technology more competitive as a source of alternative energy, the study of how to improve its efficiency is essential. The detailed balance efficiency of traditional and one-intermediate band solar cell (one-IBSC) is analyzed by using realistic spectra at AM0 and AM1.5 under various light conce…
Abstract The examined material comprised two grades of corrosion-resistant cast steel, namely GX2CrNiMoN25-6-3 and GX2CrNiMoCuN25-6-3- 3, used for example in elements of systems of wet flue gas desulphurisation in power industry. The operating conditions in media heated up to 70°C and containing Cl' and SO4 ions and s…
A practical approach to prepare thin fibrillar polyaniline was developed using ferric nitrate as an oxidant without any external dopants and templates. Doped polyaniline was directly obtained with iron (III) nitrate anion connected to imine atoms in the polyaniline backbone. The diameter and conductivity of the polyan…
Differential high-temperature mass spectrometry was used to determine the activities of Bi 2 O 3 in Bi 2 O 3 -SiO 2 glasses at 1000 K. The activities of SiO 2 and integral Gibbs energies in Bi 2 O 3 -SiO 2 glasses were determined. Negative deviations from the ideal behavior were revealed in the studied system at 1000…
An enhancement for magnetoelectric (ME) effects is studied in a three-phase ME architecture consisting of two magnetostrictive Terfenol-D (Tb(0.3)Dy(0.7)Fe(1.92)) plates, a piezoelectric PZT (Pb(Zr,Ti)O3) plate, and a pair of shape-optimized FeCuNbSiB nanocrystalline alloys. By modifying the conventional shape of the…
Increasing attention is being paid towards reducing short-term heart failure readmissions in recent years. Biomarkers such as galectin-3 are likely to play pivotal roles in future heart failure management strategies as they can provide objective information on various pathophysiologic processes involved in heart failu…
This paper proposes a new distributed battery energy architecture based on the micro-bank modules for DC microgrids. The benefits of the proposed architecture include 1) no voltage sharing problem and no overcharge/overdischarge problem; 2) high compatibility and reliability 3) high energy utilization efficiency; 4) r…
Nas indústrias de base ou de transformação tais como, siderúrgicas, metalúrgicas, petroquímicas, entre outras, a energia consumida para o aquecimento da carga sofre perdas tanto pela exaustão dos gases quanto pelos refratários que revestem internamente esses equipamentos industriais que trabalham em altas temperaturas…
The purpose of this paper is to study the feasibility of a resonant high voltage generator using a high voltage planar transformers. The emphasis is on improving the power density, efficiency, reliability, and repeatability of component characteristics of the planar high voltage transformer by a novel planar winding d…
Iron oxide nanoparticles (ION) have been studied for essential applications, like detection of biological constituents (virus, bacterials, cell, nucleic acids, protein, enzyme, etc.), magnetic bioseparation and clinic therapy and diagnosis (such as MRI magnetic fluid and hyperthermia). In this work, γ-Fe2O3has been sy…
Approximately 22 600 spent nuclear fuel (SNF) assemblies originating from the RBMK-1500 reactor of the Ignalina nuclear power plant in Lithuania need to be managed and disposed of safely. Generic investigations of RBMK-1500 SNF disposal options in Lithuania were initiated. This paper presents insights on RBMK-1500 SNF…
The corrosion inhibition of C-steel in 1 M HCl solution by cyanoacetamide derivatives was investigated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and electrochemical frequency modulation (EFM) techniques. The results obtained from these techniques show that, the inhi…
When the productivity of a coffee plantation drops considerably, the crop must be renewed. In this case, the removed plants become residues to be discarded. This work aimed to verify the utilization of the coffee plant stem in the production of conventional particleboards. The basic density and chemical composition of…
The results of the studies of physical properties and size characteristics of unmarketable natural diamond powders have been discussed. A method to compact such powders by physicochemical synthesis at pressures below ambient has been described. Morphometric and operating characteristics of powders produced from the re…
In this paper we have proposed a new Weighted Adaptive Hysteresis Band Current Controller (WAHBCC) for three phase Shunt Active Power Filter (SAPF). In WAHBCC, hysteresis band is adaptively changed in order to reduce the Total Harmonic Distortion (THD) of source current to a minimum value, while maintaining the switch…
Eleven complexes of some d and f metals with N-nitrozo-N-methylhydroxylamine (NMHA) and N -nitrozo- N -ethylhydroxylamine (NEHA) were synthesized, separated out in a crystalline state, and characterized by a set of physicochemical methods (elemental analysis, X-ray diffraction, IR and UV spectroscopy). The crystal and…
The physical mechanism of undamped temperature waves and the conditions of generation thereof in media with a finite time of local thermal relaxation are examined. The wave frequency depends on the relaxation time and the parameters of the pulse action on a medium, and the lowest frequencies correspond, in particular,…
Este trabalho corresponde à segunda parte da revisão das superfícies fotocatalíticas de titânia em substratos cerâmicos. Nesta parte, são descritos os principais fatores que influenciam na obtenção da fase anatase como: substrato, processos de deposição e tratamento térmico. Nos substratos que apresentam superfícies á…