B6 – LU institūti un aģentūras / Institutes and agencies of the UL: Recent submissions
Anzeige der Dokumente 221-240 von 742
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Investigation of the Efficiency of Shielding Gamma and Electron Radiation Using Glasses Based on TeO2-WO3-Bi2O3-MoO3-SiO to Protect Electronic Circuits from the Negative Effects of Ionizing Radiation
(MDPI, 2022)This article considers the effect of MoO3 and SiO additives in telluride glasses on the shielding characteristics and protection of electronic microcircuits operating under conditions of increased radiation background or ... -
Influence of Stress on Electronic and Optical Properties of Rocksalt and Wurtzite MgO–ZnO Nanocomposites with Varying Concentrations of Magnesium and Zinc
(MDPI, 2022)The structural, electronic and optical properties of stressed MgO–ZnO nanocomposite alloys with concentrations of Zn and Mg varying from 0.125 to 0.875 were studied using ab initio simulations. Two crystal structures are ... -
The influence of Sb doping on the local structure and disorder in thermoelectric ZnO:Sb thin films
(Elsevier, 2023)Thermoelectric transparent ZnO:Sb thin films were deposited by magnetron sputtering, with Sb content varying between 2 and 14 at%. As evidenced by X-ray diffraction analysis, the films crystallize in the ZnO wurtzite ... -
Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc
(MDPI, 2022)The structural, electronic and optical properties of rocksalt Mg (Formula presented.) Zn (Formula presented.) O and wurtzite Zn (Formula presented.) Mg (Formula presented.) O with the concentration of Zn and Mg varying ... -
Antiviral efficacy of cerium oxide nanoparticles
(Nature Research, 2022)Nanomaterials are prospective candidates for the elimination of viruses due to their multimodal mechanisms of action. Here, we tested the antiviral potential of a largely unexplored nanoparticle of cerium dioxide (CeO2). ... -
FIBRE OPTICAL COUPLER SIMULATION BY COMSOL MULTIPHYSICS SOFTWARE
(Sciendo, 2022)The paper presents a simulation model developed for a special optical coupler intended for coupling radiation from signal and pump sources used for the realization of cladding-pumped doped fibre amplifiers. The model is ... -
Flame-Retardant and Tensile Properties of Polyamide 12 Processed by Selective Laser Sintering
(MDPI, 2022)Composite materials are becoming widely applied in fire-critical conditions such as, e.g., aviation interior parts. Environmental considerations motivate the use of additive manufacturing due to the decrease of polymer ... -
ENERGY TRANSPORT IN SiO2 CRYSTALS: LUMINESCENCE EXCITATION SPECTRA OF STISHOVITE AND α-QUARTZ
(Sciendo, 2022)The migration of elementary electronic excitations was studied in a single crystal of stishovite and compared with migration in a crystal of α-quartz and polycrystalline stishovite powder. The research method is based on ... -
Electromechanical properties in CaTiO3modified Na0.5Bi0.5TiO3-BaTiO3solid solutions above morphotropic phase boundary
(American Institute of Physics Inc., 2022)The structural, electromechanical, and dielectric properties of (1-x)(0.8Na0.5Bi0.5TiO3-0.2BaTiO3)-xCaTiO3 [(1-x) (0.8NBT-0.2BT)-xCT] ceramics are studied as candidates for room temperature actuators with high field-induced ... -
Effect of Core–Shell Rubber Nanoparticles on the Mechanical Properties of Epoxy and Epoxy-Based CFRP
(MDPI, 2022)The aim of the research was to estimate the effect of core–shell rubber (CSR) nanoparticles on the tensile properties, fracture toughness, and glass transition temperature of the epoxy and epoxy-based carbon fiber reinforced ... -
EFFECT OF ELECTRON IRRADIATION CONDITIONS ON THE EFFICIENCY OF DEFECT FORMATION IN MgAl2 O4 SPINEL
(Natsional'nyi Nauchnyi Tsentr, 2022)The efficiency of defect formation in spinel ceramics of magnesium aluminate (MgAl2O4) under electron irradiation has been determined. A strong effect of cooling on the concentration of residual defects was revealed. When ... -
Glyphosate Sensor Based on Nanostructured Water-Gated CuO Field-Effect Transistor
(MDPI, 2022)This research presents a comparative analysis of water-gated thin film transistors based on a copper oxide (CuO) semiconductor in the form of a smooth film and a nanostructured surface. A smooth CuO film was deposited ... -
DEVELOPMENT OF LIQUID CRYSTAL LAYER THICKNESS AND REFRACTIVE INDEX MEASUREMENT METHODS FOR SCATTERING TYPE LIQUID CRYSTAL DISPLAYS
(Sciendo, 2022)We report the measuring method of scattering type display liquid crystal layer thickness based on capacitance values suitable for inline production process control. The method is selected for its effectiveness and simplicity ... -
DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 MODIFIED WITH SODIUM NIOBATE
(Lithuanian Physical Society, 2022)In this paper, we present the dielectric and piezoelectric properties of tetragonal 0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 modified with NaNbO3 ((1-x)[0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 ]-xNaNbO3 ). Our experimental study has revealed ... -
Bi2Se3 Nanostructured Thin Films as Perspective Anodes for Aqueous Rechargeable Lithium-Ion Batteries
(MDPI, 2022)In recent years, aqueous rechargeable lithium-ion batteries (ARLIBs) have attracted attention as an alternative technology for electrical storage. One of the perspective battery anode materials for application in ARLIBs ... -
拉脱维亚汉语教学探索 : EXPLORATION OF CHINESE TEACHING IN LATVIA
(University of Latvia Press, 2021)The 10th Anniversary of Confucius Institute at University of Latvia. Exploration of Chinese Teaching in Latvia. -
拉脱维亚视阈下的 拉脱维亚与中国研究: A STUDY ON LATVIA AND CHINA FROM LATVIAN PERSPECTIVE
(University of Latvia Press, 2022) -
Latvijas Universitātes Konfūcija institūta desmit gadu jubileja
(University of Latvia Press, 2021) -
Peculiarities of the local structure in new medium- and high-entropy, low-symmetry tungstates
(Elsevier, 2022)New monoclinic (/) tungstates – a medium-entropy tungstate, (MnNiCuZn)WO4, and a high-entropy tungstate, (MnCoNiCuZn)WO4 – were synthesized and characterized. Their phase purity and solid solution nature were confirmed by ... -
Octahedral Tilting in Homologous Perovskite Series CaMoO3-SrMoO3-BaMoO3 Probed by Temperature-Dependent EXAFS Spectroscopy
(MDPI, 2022)Local distortions in perovskites can be induced by cation displacements and/or by the tilting and rotating of cation–anion octahedra. Both phenomena have been subject to intense investigations over many years. However, ...