Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 638-657 of 1025
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One more geodesic graph
(2013-12-17)In this note, written in Latvian, a way to build geodesic graphs, graphs with unique shortest path between every two vertices, is considered. Geodesic graphs are trees, odd cycles, and nontrivial example, the graph of ... -
Onomastikas pētījumi I: Vallijas Dambes 100. dzimšanas dienai veltītās konferences materiāli
(LU Latviešu valodas institūts, 2014)Krājumā “Onomastikas pētījumi / Onomastic Investigations” rakstus publicējuši vietvārdu un personvārdu pētnieki no desmit pasaules valstīm, kas 2012. gadā piedalījās par godu latviešu vietvārdu pētnieces Vallijas Dambes ... -
Onomastikas pētījumi II : Starptautiskās zinātniskās konferences “Onomastikas pētījumi” (Rīga, 2018. gada 10.–12. maijs) rakstu krājums
(LU Latviešu valodas institūts, 2020)Zinātnisko rakstu krājumā „Onomastikas pētījumi II / Onomastic Investigations II” apkopoti Latvijas, Lietuvas, Amerikas, Baltkrievijas, Jaunzēlandes, Krievijas, Polijas, Spānijas, Ungārijas un Vācijas pētījumi par īpašvārdiem. ... -
Optical and X-ray Observations of M31N 2007-12b: An Extragalactic Recurrent Nova with a Detected
(American Astronomical Society, 2009) -
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. ... -
Optical detection of paramagnetic centres in activated oxyfluoride glass-ceramics
(Polish Academy of Sciences, 2018)Electron paramagnetic resonance (EPR), magnetic circular dichroism (MCD) and EPR detected via MCD (MCD-EPR) investigations have been performed on rare-earth activated oxyfluoride glasses and glass-ceramics. Er3+, Gd3+, and ... -
Optical properties and structure particularities of LiNbO3 crystals grown from a boron-doped melt
(Taylor and Francis Ltd., 2019)A series of LiNbO3:B crystals was grown from the melt doped by boron. It is shown that LiNbO3:B crystals possess an increased resistance to optical damage. We have found changes according to Raman spectra confirming the ... -
Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis
(Lithuanian Physical Society, 2021)The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al2 O3 mixture under high-pressure nitrogen is proposed. The novelty of this method consists in adding KClO4 or Mg(ClO4 )2 and extra Al into ... -
Optical properties of thin metal films with nanohole arrays on porous alumina–aluminum structures
(Royal Society of Chemistry, 2015) -
Optical properties of zinc-iridium oxide thin films
(Institute of Physics Publishing, 2019)We present the results of an investigation of ultraviolet, visible, near-infrared (UV-Vis-NIR) and X-ray absorption spectroscopy absorption spectra for zinc-iridium oxide (Zn-Ir- O) thin films with various iridium ... -
Optical Scattering by Dense Disordered Metal Nanoparticle Arrays
(Springer, 2014) -
Optimization of gyrotron resonator’s dimensions
(National Institute of Telecommunications, 2021)This paper explains the procedure of determining the initial dimensions of a gyrotron resonator. In particular, the paper discusses which geometrical parameters impact the wave properties of the resonator. The solution is ... -
Optimization of the enzyme power source for a nano drug delivery system fuelled by glucose in blood plasma
(Institute of Physics Publishing, 2019)A unique in vivo electrical pulse generator to improve membrane permeability for drugs and simultaneously facilitate self-powered nano devices for nano drug delivery systems (NDDS) was identified. The use of an unsupported ... -
Oral history: migration and local identities
(Institute of Philosophy and Sociology, University of Latvia, 2011) -
Ordering of fluorite-type phases in erbium-doped oxyfluoride glass ceramics
(Elsevier B.V., 2018)In this study, novel transparent Er3+ doped glass ceramics were prepared from melt-quenched oxyfluoride glasses with general composition of Na2O-NaF-BaF2-YbF3-Al2O3-SiO2. The crystallization of fluorite (BaF2, BaF2-YbF3, ... -
Orientation of the electric field gradient and ellipticity of the magnetic cycloid in multiferroic BiFeO3
(Taylor and Francis Ltd., 2017)The paper deals with the hyperfine interactions observed on the 57Fe nucleus in multiferroic BiFeO3 by means of the 14.41-keV resonant transition in 57Fe and for transmission geometry applied to the random powder sample. ... -
Origin of Kerr effect: investigation of solutions by polarization dependent Z-scan
(Optical Society of America, 2020)The nonlinear refractive index dependence on the incident light polarization state has been studied for pure chloroform and chloroform solutions of aminobenziliden-1,3-indandione derivatives. Measurements were done with ... -
Origin of pressure-induced insulator-to-metal transition in the van der Waals compound FePS3 from first-principles calculations
(John Wiley and Sons Inc., 2020)Pressure-induced insulator-to-metal transition (IMT) has been studied in the van der Waals compound iron thiophosphate (FePS3) using first-principles calculations within the periodic linear combination of atomic orbitals ... -
Origin of Pressure-Induced Metallization in Cu3N: An X-ray Absorption Spectroscopy Study
(Wiley-VCH Verlag, 2018)High-pressure (0–26.7 GPa) Cu K-edge X-ray absorption spectroscopy is used to study possible structural modifications of anti-perovskite-type copper nitride (Cu3N) crystal lattice. The analysis of X-ray absorption near-edge ...