Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 962-981 of 1027
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Use of site symmetry in supercell models of defective crystals: Polarons in CeO2
(Royal Society of Chemistry, 2017)In supercell calculations of defective crystals, it is common to place a point defect or vacancy in the atomic position with the highest possible point symmetry. Then, the initial atomic structure is often arbitrary distorted ... -
Using 2-colorings in the theory of uniquely Hamiltonian graphs
(2019-02)We use the concept of 2-coloring in analyzing UH3 graphs and building exact specifications of functions to find new UH3 graphs by Hamiltonian cycle edge extractions -
UV light induced processes in pure and doped AlN ceramics
(Elsevier, 2021)AlN ceramics samples, pure and doped with Y2O3, Eu2O3 and GaN, and produced from the same AlN powder, were studied for photoelectric effect, photoluminescence spectra and kinetics and thermoluminescence under irradiation ... -
Uzņēmumu ārtelpas reklāminformācija ģeosemiotikas kontekstā
(LU Latviešu valodas institūts, 2018)Rakstā uzmanība ir pievērsta ārtelpas reklāminformācijas izpētes teorētiskajiem un metodoloģiskajiem jautājumiem, un tam ir četri savstarpēji saistīti mērķi: 1) definēt, kas ir semiotiskā ainava un kādi ir tās analīzes ... -
Über die Bestimmung von zwei speziellen Klassen von Eilinien
(Mathematische Zeitschrift, 1937) -
Vacancy defects in Ga2O3: First-principles calculations of electronic structure
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)First-principles density functional theory (DFT) is employed to study the electronic structure of oxygen and gallium vacancies in monoclinic bulk β-Ga2 O3 crystals. Hybrid exchange– correlation functional B3LYP within the ... -
Vai pasaule var būt pieredzes priekšmets?
(LU FSI, 2018-02)Jautājuma “Vai pasaule var būt pieredzes priekšmets?” atbilde ir atkarīga no tā, vai varam pasaulē saskatīt fenomenu vai jēdzienu. Vērstība uz pasauli it kā ir tik acīmredzama, tomēr tai nav nekāda īpaša satura, taču tas ... -
Values as a hobby: the transformation and survival of cultural ritual values in the process of desecration
(Latvijas Universitātes Filozofijas un socioloģijas institūts, 2023)The paper examines how values lose their sacred or protected significance and turn into values as a hobby. Using an excerpt from Arundhati Roy's novel “The God of Small Things”, a trend of transformation of values is ... -
Variation of Nonlinear Refraction and Three-Photon Absorption of Indium–Tin Oxide Quantum Dot Thin Films and Solutions in Near Infrared Range
(MDPI, 2023)We characterize the nonlinear optical properties of indium–tin oxide (ITO) quantum dots (QDs) in the IR range using the Z-scan method. We present results of three-photon absorption (3PA), third harmonic generation (3HG), ... -
Vibrational analysis of paraelectric–ferroelectric transition of linbo3: An ab-initio quantum mechanical treatment
(MDPI, 2021)The phase transitions between paraelectric (PE) and ferroelectric (FE) isomorph phases of LiNbO3 have been investigated quantum mechanically by using a Gaussian-type basis set, the B3LYP hybrid functional and the CRYSTAL17 ... -
Vide un cilvēks: jaunākie pētījumi par neolīta periodu Austrumbaltijā: LU 82. starptautiskās zinātniskās konferences sekcijas programma un tēzes
(Latvijas Universitātes Latvijas vēstures institūts, 2024-03)Sekcija ir veltīta vienam no interesantākajiem periodiem aizvēsturē – neolītam un tajā notiekošajiem procesiem, īpašu uzmanību pievēršot vides faktoru un cilvēka mijiedarbībai. Vides apstākļi un tajā pieejamie resursi ... -
Viskrievijas arheoloģijas kongress Rīgā un tā ieguldījums Latvijas arheoloģijas attīstībā
(Latvijas Vēstures institūts, 2016) -
Water Splitting on Multifaceted SrTiO3 Nanocrystals: Calculations of Raman Vibrational Spectrum
(MDPI, 2022)Various photocatalysts are being currently studied with the aim of increasing the photocatalytic efficiency of water splitting for production of hydrogen as a fuel and oxygen as a medical gas. A noticeable increase of ... -
Water Splitting on Multifaceted SrTiO3 Nanocrystals: Computational Study
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)Recent experimental findings suggest that strontium titanate SrTiO3 (STO) photocatalytic activity for water splitting could be improved by creating multifaceted nanoparticles. To understand the underlying mechanisms and ... -
WO3 as Additive for Efficient Photocatalyst Binary System TiO2/WO3
(Walter de Gruyter, 2021)Two different methods of synthesis of TiO2/WO3 heterostructures were carried out with the aim to increase photocatalytic activity. In this study, anodic TiO2 nanotube films were synthesized by electrochemical anodization ... -
Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)Fuel cells, batteries and supercapacitors are critical to meet the rising global demand for clean, sustainable energy. Biomass-derived activated carbon can be obtained with tailored properties to fulfil the extensive need ... -
X-ray absorption and Raman spectroscopy studies of tungstates solid solutions ZncNi1-cWO4 (c=0.0-1.0)
(AIP Publishing, 2020)The influence of thermal disorder and static distortions on the local structure in microcrystalline solid solutions of tungstates ZncNi1-cWO4 with c = 0.0–1.0 was investigated using temperature-dependent (10–300 K) x-ray ... -
X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4
(Institute for Low Temperature Physics and Engineering, 2018)Thermochromic phase transition was studied in CuMoO4 using the Cu and Mo K-edge x-ray absorption spec-troscopy in the temperature range of 10-300 K. The hysteretic behavior has been evidenced from the tempera-ture dependence ... -
X-ray excited luminescence of SrAl2O4:Eu,Dy at low temperatures
(Elsevier B.V., 2018)