Search results for " tin"
showing 4 items of 164 documents
Sabiedrības attieksme pret iepazīšanos internetā: “Tinder” gadījums Latvijas Universitātes studentu vidū
2021
Bakalaura darba tēma ir Sabiedrības attieksme pret iepazīšanos internetā: “Tinder” gadījums Latvijas Universitātes studentu vidū. Bakalaura darba mērķis ir noskaidrot Latvijas Universitātes studentu attieksmi pret iepazīšanos interneta platformā Tinder. Bakalaura darba teorētiskajā daļā tiek aprakstīta sociālās identitātes veidošanās internetā, iepazīšanās internetā psiholoģiskie motīvi un iepazīšanās platformu lietošanas veicinošie un kavējošie faktori. Empīriskajā pētījumā tiek kombinētas kvalitatīvās un kvantitatīvās pētniecības metodes. Lai iegūtu reprezentatīvus datus, kas sniegtu ieskatu par Latvijas Universitātes studentu iepazīšanos internetā psiholoģiskajiem motīviem, kā arī iepazī…
Tin resonance-ionization schemes for atomic- And nuclear-structure studies
2020
This paper presents high-precision spectroscopic measurements of atomic tin using five different resonance-ionization schemes performed with the collinear resonance-ionization spectroscopy technique. Isotope shifts were measured for the stable tin isotopes from the $5{s}^{2}5{p}^{2}\phantom{\rule{0.28em}{0ex}}^{3}{P}_{0,1,2}$ and ${}^{1}{S}_{0}$ to the $5{s}^{2}5p6s\phantom{\rule{0.28em}{0ex}}^{1}{P}_{1},^{3}{P}_{1,2}$ and $5{s}^{2}5p7s{\phantom{\rule{0.28em}{0ex}}}^{1}{P}_{1}$ atomic levels. The magnetic dipole hyperfine constants ${A}_{\mathrm{hf}}$ have been extracted for six atomic levels with electron angular momentum $Jg0$ from the hyperfine structures of nuclear spin $I=1/2$ tin isot…
Characterization of rhenium oxide films and their application to liquid crystal cells
2009
Rhenium trioxide exhibits high electronic conductivity, while its open cubic crystal structure allows an appreciable hydrogen intercalation, generating disordered solid phases, with protonic conductivity. Rhenium oxide thin films have been obtained by thermal evaporation of ReO3 powders on different substrates, maintained at different temperatures, and also by reactive magnetron sputtering of a Re metallic target. A comparative investigation has been carried out on these films, by using micro-Raman spectroscopy and x-ray diffraction. Two basic types of solid phases appear to grow in the films: a red metallic HxReO3 compound, with distorted perovskite structures, like in the bulk material, a…
ANALISI DELLE TENSIONI RESIDUE NEI VETRI MEDIANTE FOTOELASTICITÀ RGB E LASTRA A TINTA SENSIBILE
2012
L'analisi delle tensioni residue nel vetro viene solitamente effettuata mediante metodi fotoelastici. Questo lavoro considera l'automazione del metodo fotoelastico in luce bianca basato sull'uso congiunto della fotoelasticità RGB e di una lastra a tinta sensibile (full wave plate o tint plate), che manifesta il ritardo di un ordine di frangia, posta in serie alla lastra di vetro. Il metodo proposto è stato applicato all’analisi delle tensioni residue membranali in un vetro temperato.