Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 658-677 of 1025
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Ornamental sign language in the first order tracery belts
(Prespacetime Journal, 2010)We consider an ornamental sign language of first order where principles of sieve displacement, of asymmetric building blocks as a base of ornament symmetry, color exchangeability and side equivalence principles work. Generic ... -
ORNAMENTAL SIGN LANGUAGE IN THE FIRST ORDER TRACERY BELTS
(QuantumDream, Inc., 2013-09-02) -
ORR activity and stability of Co-N/C catalysts based on silicon carbide derived carbon and the impact of loading in acidic media
(Electrochemical Society Inc., 2018)A simple and facile synthesis method was used to produce two Co-N/C type oxygen reduction reaction (ORR) catalysts. The materials were initially characterized by utilizing a variety of physical methods. Most importantly, ... -
Overview of the Structural, Electronic and Optical Properties of the Cubic and Tetragonal Phases of PbTiO3 by Applying Hubbard Potential Correction
(MDPI, 2023)We have performed a systematic study resulting in detailed information on the structural, electronic and optical properties of the cubic (Pm (Formula presented.) m) and tetragonal (P4mm) phases of PbTiO3 applying the GGA/PBE ... -
Oxidation State and Local Structure of Chromium Ions in LaOCl
(MDPI, 2021)LaOCl doped with 0–10 mol% Cr was synthesized by thermal decomposition of chlorides. X-ray diffraction (XRD) analysis revealed that incorporation of chromium results in a decrease of the lattice parameter a and a simultaneous ... -
Oxygen evolution reaction on a N-doped Co0.5-terminated Co3O4 (001) surface
(De Gruyter, Latvian Academy of Sciences, 2020)Recent experimental findings suggest that the catalytic activity of Co3O4 for oxygen evolution reaction (OER) could be improved by nitrogen doping. We present preliminary OER modelling on a N-doped Co3O4 surface, with ... -
Oxygen Vacancy Formation and Migration within the Antiphase Boundaries in Lanthanum Scandate-Based Oxides: Computational Study
(MDPI, 2022)The atomic structure of antiphase boundaries in Sr-doped lanthanum scandate (La1−xSrxScO3−δ) perovskite, promising as the proton conductor, was modelled by means of DFT method. Two structural types of interfaces formed by ... -
Padomju Latvijas un trimdas literātu saskarsme dzelzs priekškara laikmetā 20.gs. 50.-80.gadi
(Latvijas Universitāte, 2007) -
Pair vacancy defects in β-Ga2O3 crystal: Ab initio study
(Elsevier, 2022)Despit many studies dedicated to the defects in β-Ga2O3, information about formation processes of complex “donor-acceptor” defects in β-Ga2O3 and their energetic characteristics is still very scarce. Meanwhile, complex ... -
Par n dimensiju Eiklīda telpas līknēm
(1936-10) -
Par oskulāciju, superoskulāciju un charakteristiskiem punktiem
(1943-04)No Dr. A.Lūša raksturojuma E.Grinberga zinātniskajam darbam: Doktora disertacija, ko E.Grīnbergs sācis strādāt 1940/41 m.g. Latvija Valsts Universitātē un aizstāvējis Rīgas Universitātē 1944.g. /oponenti prof.Dr.A.Lūsis, ... -
Par viduslejasvācu valodas pēdām latviešu īpašvārdos
(Vilniaus universitetas, 2020)The great impact of Middle Low German on the Latvian language during the 13–16th century is a well-known and rather widely researched fact. However, the main focus of linguists' attention has so far been on the apellative ... -
Paramagnetic Defects and Thermoluminescence in Irradiated Nanostructured Monoclinic Zirconium Dioxide
(MDPI, 2022)The ESR spectra of nanostructured samples of monoclinic ZrO2 irradiated by electrons with energies of 130 keV, 10 MeV, and by a beam of Xe ions (220 MeV) have been studied. It has been established that irradiation of samples ... -
Parameters for automated star identification
(Taylor&Francis, 2014) -
Particle size effects on the structure and emission of Eu3+:LaPO4 and EuPO4 phosphors
(Elsevier B.V., 2018)This paper provides the detailed study of (nano)particle's size effect on structural and luminescent properties of LaPO4:Eu3+ synthesized by four different methods: high temperature solid-state, co-precipitation, reverse ... -
Patiesības izpratne Latvijas filosofijā 20. gadsimta divdesmitajos un trīsdesmitajos gados: Teodors Celms un Jūlijs Aleksandrs Students
(LU Filozofijas un socioloģijas institūts, 2011)Rakstā aplūkoti Latvijas pirmās neatkarības laika filozofu Teodora Celma un Jūlija Aleksandra Studenta uzskati par jēdzienu "patiesība", šī jēdziena skaidrojumi un patiesības teorijas. -
Pauls Dāle: Dievs un "filozofa lieta"
(LU Filozofijas un socioloģijas institūts, 2013) -
Peculiarities of Phase Formation in Mn-Based Na SuperIonic Conductor (NaSICon) Systems: The Case of Na1+2 xMnxTi2- x(PO4)3(0.0 ≤ x ≤ 1.5)
(American Chemical Society, 2021)NAtrium SuperIonic CONductor (NASICON) structured phosphate framework compounds are attracting a great deal of interest as suitable electrode materials for "rocking chair"type batteries. Manganese-based electrode materials ...