Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 169-188 of 1020
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Daugavas ielejas viduslaiku akmens lejamveidnes
(2016-04-20) -
Dažas transformācijas elementārā ģeometrijā
(1935-04-25)Referāts nolasīts matēmatisko zinātņu darbinieku kongresā, 25. aprīlī 1935. gadā. Izdots Rīgā, 1936. Izdevusi Matēmatisko zinātņu darbinieku biedrība. Autors Cand. math. E. Grünbergs -
Daži pētījumi par telpas ruletēm
(1933-08-14)Darbs kvalificēts kā Kandidāta darbs, Konkursa darbs, iesniegts LŪ, Matēmatikas nodaļai 1933. g. 14. augustā. Stud. math. Emanuels Grünbergs, Matr. 14875. Motto "Patientia vincet." Disertācijā 143 lpp. Publicējam bez pilnā ... -
Daži trīssakarīgi grafi un to saimes bez Hamiltona cikliem
(2013-12-17)These manuscripts (in Latvian) contain examples of graphs without Hamiltonian cycles. See the flower snark J5 on the page 13. The date here 1.6.78. -
Depth profiles of aggregate centers and nanodefects in LiF crystals irradiated with 34 MeV 84Kr, 56 MeV 40Ar and 12 MeV 12C ions
(Elsevier B.V., 2018)Depth profiles of nanohardness and photoluminescence of F2 and F3 + centers in LiF crystals irradiated with 12 MeV 12C, 56 MeV 40Ar and 34 MeV 84Kr ions at fluences 1010–1015 ions/cm2 have been studied using laser scanning ... -
Depth profiles of damage creation and hardening in MgO irradiated with GeV heavy ions
(Elsevier B.V., 2019)The effect of irradiation with GeV heavy ions (U, Au, Bi) on the structure and mechanical properties of MgO single crystals was studied. The methods of nanoindentation, dislocation mobility, optical absorption and ... -
Determination of Kerr and two-photon absorption coefficients of indandione derivatives
(SPIE, 2017)We studied nonlinear optical properties of two different aminobenziliden-1,3-indandione derivatives - DDMABI and DMABI-OH by employing the Z-scan method. Through this we described how different donor and acceptor groups ... -
Determination of Kerr and two-photon absorption coefficients of ABI thin films
(SPIE, 2018)In this paper we report the results of studied nonlinear optical properties of DMABI-Ph6 in form of solutions with chloroform as solvent and guest-host thin films with poly(methyl methacrylate) as host material. We implemented ... -
Determination of third-order nonlinear optical properties of ABI derivatives
(International Frequency Sensor Association, 2019)In this paper we studied linear and nonlinear optical properties of novel organic materials MeSBI and MeOBI in form of solution with chloroform as solvent. For experimental measurements we implemented Z-scan method as it ... -
Development of Bi2S3 thin film solar cells by close-spaced sublimation and analysis of absorber bulk defects via in-depth photoluminescence analysis
(Elsevier, 2023)The emergence of new PV applications in society requires the design of new materials and devices based on green and earth-abundant elements, with a different set of properties and wider applicability. In this perspective, ... -
Development of Bi2S3 thin film solar cells by close-spaced sublimation and analysis of absorber bulk defects via in-depth photoluminescence analysis
(Elsevier, 2023)The emergence of new PV applications in society requires the design of new materials and devices based on green and earth-abundant elements, with a different set of properties and wider applicability. In this perspective, ... -
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 ... -
Development, Characterization, and Testing of a SiC-Based Material for Flow Channel Inserts in High-Temperature DCLL Blankets
(Institute of Electrical and Electronics Engineers Inc., 2018)Flow channel inserts (FCIs) are the key elements in the high-temperature dual-coolant lead-lithium blanket, since in this concept the flowing PbLi reaches temperatures near 700 °C and FCIs should provide the necessary ... -
Dialoga un kritikas neiespējamība iekšējo konfliktu draudos: woke vs based
(Latvijas Universitātes Filozofijas un socioloģijas institūts, 2022)Jautājumā par iekšējo karu cēloņiem ir jāpaļaujas uz daudziem minējumiem, jo ierosinoši notikumi var izraisīt konfliktu, tomēr tie neko daudz nepasaka par plašāku kontekstu, apstākļiem, sabiedrisko noskaņojumu, kas dzirkstelei ... -
Dielectric and acoustic properties of modified barium titanate ceramics
(Taylor and Francis Inc., 2019)A study of cobalt doping effect on the dielectric response and elastic properties of Ba0.95Pb0.05TiO3 solid solution within the range of 20–200 °C is reported. The results of a study of the dielectric permittivity, dielectric ... -
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 ...