B6 – LU institūti un aģentūras / Institutes and agencies of the UL: Recent submissions
Now showing items 61-80 of 1027
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Optical Characteristics of MgAl2O4 Single Crystals Irradiated by 220 MeV Xe Ions
(MDPI, 2023)In In this study, the optical properties of magnesium-aluminate spinel were examined after being irradiated with 220 MeV Xe ions. The research aimed to simulate the impact of nuclear fuel fission fragments on the material. ... -
Nanopore Formation at the Junctions of the Polycrystal Intergranular Boundary Under Plastic Deformation
(Sciendo, 2023)The article is devoted to the study of the mechanism of nanopore formation in the junctions of polycrystal grains under the plastic deformation of a polycrystal due to the conservative sliding of lattice dislocations. A ... -
Improvement of β-SiC Synthesis Technology on Silicon Substrate
(MDPI, 2023)This article presents an enhanced method for synthesizing β-SiC on a silicon substrate, utilizing porous silicon as a buffer layer, followed by thermal carbide formation. This approach ensured strong adhesion of the SiC ... -
Electronic, optical, and vibrational properties of an AgAlS2 crystal in a high-pressure phase
(MDPI, 2023)The aim of this study is to comprehensively examine the structural composition and properties of the AgAlS2 crystal during its high-pressure phase. This analysis delves into the second coordination environment of the crystal ... -
Electrochemical Growth and Structural Study of the AlxGa1−xAs Nanowhisker Layer on the GaAs Surface
(MDPI, 2023)This work presents a novel, cost-effective method for synthesizing AlxGa1−xAs nanowhiskers on a GaAs surface by electrochemical deposition. The process begins with structuring the GaAs surface by electrochemical etching, ... -
Control of Strongly Nonequilibrium Coherently Correlated States and Superconducting Transition Temperature
(MDPI, 2023)Our paper considers the possibility of the emergence and control of non-equilibrium states of a quasi-homogenous condensed medium with energy and particle flows in the phase space, which, first of all, manifest themselves ... -
Dielectric behaviour of nitrogen doped perovskite SrTiO3dNd films
(Royal Society of Chemistry, 2023)Technologically important high-permittivity dielectrics are often achieved using cationic engineering of ABO3-type perovskite para(ferro)electrics. Here, we experimentally and theoretically explore the potential of less ... -
Reliģiski-filozofiski raksti, XXXIV
(LU Filozofijas un socioloģijas institūts, 2023-12)RFR XXXIV autoru uzanības centrā ir saturiski dažāds, atšķirīgu iespaidu, atmiņas un attieksmi veidojošs mantojums. Piemēram, Kaspars Kļaviņš no mūsdienu skatpunkta izvērtē vācbaltiešu garīdznieka, vēsturnieka, valodnieka ... -
The Effect of Stimulus Contrast and Spatial Position on Saccadic Eye Movement Parameters
(MDPI, 2023-12)Background: Saccadic eye movements are rapid eye movements aimed to position the object image on the central retina, ensuring high-resolution data sampling across the visual field. Although saccadic eye movements are studied ... -
Review of Systematic Tendencies in (001), (011) and (111) Surfaces Using B3PW as Well as B3LYP Computations of BaTiO3, CaTiO3, PbTiO3, SrTiO3, BaZrO3, CaZrO3, PbZrO3 and SrZrO3 Perovskites
(MDPI, 2023)We performed B3PW and B3LYP computations for BaTiO3 (BTO), CaTiO3 (CTO), PbTiO3 (PTO), SrTiO3 (STO), BaZrO3 (BZO), CaZrO3 (CZO), PbZrO3 (PZO) and SrZrO3 (SZO) perovskite neutral (001) along with polar (011) as well as (111) ... -
Cilvēks un cilvēksituācija sabiedrībā un kultūrā: zinātniskās konferences rakstu krājums
(LU Filozofijas un socioloģijas institūts, 2023-12-28)Krājumu veido LU Filozofijas un socioloģijas institūta (FSI) pētnieku LU FSI prioritārajā projektā “Kultūras, identitātes, starpkultūru komunikācijas un cilvēksituācijas pētījumi humānisma vērtību, konfliktu un krīžu ... -
Probing densified silica glass structure by molecular oxygen and E’ center formation under electron irradiation
(Nature Research, 2023)This study aims to learn more about the structure of densified silica with focus on the metamict-like silica phase (density = 2.26 g/cm3) by examining the formation of E’ point defects and interstitial molecular oxygen O2 ... -
Investigation of osmotic shock effect on pulsed electric field treated S. cerevisiae yeast cells
(Nature Research, 2023)Pulsed electric field (PEF) treatment is known to cause plasma membrane permeabilization of microorganisms, an effect known as electroporation. PEF treatment is very attractive since it can achieve permeabilization with ... -
Review of First Principles Simulations of STO/BTO, STO/PTO, and SZO/PZO (001) Heterostructures
(MDPI, 2023)In this study, we review our first-principles simulations for STO/BTO, STO/PTO, and SZO/PZO (001) heterostructures. Specifically, we report ab initio B3PW calculations for STO/BTO, STO/PTO, and SZO/PZO (001) interfaces, ... -
Science in times of crisis: How does the war affect the efficiency of Ukrainian scientists?
(Business Perspectives, 2023)This study aims to assess how to prevent the loss of academic potential due to the full-scale war unleashed by Russia on the territory of Ukraine. The paper establishes the relationship between the location of Ukrainian ... -
Proton migration barriers in BaFeO3-δ – insights from DFT calculations
(Royal Society of Chemistry, 2023) -
Solvothermal Synthesis of Calcium Hydroxyapatite via Hydrolysis of Alpha-Tricalcium Phosphate in the Presence of Different Organic Additives
(MDPI, 2023)In this study, the effects of sodium lauryl sulfate and various amino acids (DL-aspartic acid, dodecanedioic acid, and suberic acid) on the formation of calcium-deficient hydroxyapatite via hydrolysis of α-tricalcium ... -
Simulation of a Single-Electron Device Based on Endohedral Fullerene (KI)@C180
(MDPI, 2023)The progress of modern electronics largely depends on the possible emergence of previously unknown materials in electronic technology. The search for and combination of new materials with extraordinary properties used for ... -
Shortwave Ultraviolet Persistent Luminescence of Sr2MgSi2O7: Pr3+
(MDPI, 2023)Currently, extensive research activities are devoted to developing persistent phosphors which extend beyond the visible range. In some emerging applications, long-lasting emission of high-energy photons is required; however, ... -
The Electronic Structures and Energies of the Lowest Excited States of the Ns0, Ns+, Ns− and Ns-H Defects in Diamond
(MDPI, 2023)This paper reports the energies and charge and spin distributions of the mono-substituted N defects, N0s, N+s, N−s and Ns-H in diamonds from direct Δ-SCF calculations based on Gaussian orbitals within the B3LYP function. ...