Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title

Now showing items 732-751 of 1020

    • Quantitative optical analysis of filler dispersion degree in MWCNT – epoxy nanocomposite 

      Glaskova, Tatjana; Zarrelli, Mauro; Aniskevich, Andrey; Giordano, Michele; Trinkler, Laima; Berzina, Baiba (Elsevier, 2012)

    • Quantum Optics and Photonics 2021: Book of Abstracts : The 4th International Conference, Riga, 22-23 April 2021 

      The 4th International Conference (University of Latvia, 2021)

    • Quantum sciences, Space sciences and Technologies – PHOTONICS RIGA 2023 

      Editor - Bērziņa, Dina (University of Latvia Press, 2023-06)
      A collection of the 5th International Conference 'Quantum sciences, Space sciences and Technologies – PHOTONICS RIGA 2023' reports

    • Radiation-induced stable radicals in calcium phosphates: Results of multifrequency epr, ednmr, eseem, and endor studies 

      Murzakhanov, Fadis F.; Grishin, Peter O.; Goldberg, Margarita A.; Yavkin, Boris V.; Mamin, Georgy V.; Orlinskii, Sergei B.; Fedotov, Alexander Yu.; Petrakova, Natalia V.; Antuzevics, Andris; Gafurov, Marat R.; Komlev, Vladimir S. (Multidisciplinary Digital Publishing Institute (MDPI), 2021)
      This article presents the results of a study of radiation-induced defects in various synthetic calcium phosphate (CP) powder materials (hydroxyapatite—HA and octacalcium phosphate—OCP) by electron paramagnetic resonance ...

    • Radiācijas defektu pētījumi ar EPR metodi LiBaF3 kristālā 

      Ogorodņiks, Vadims (2004)
      Izpētīts ar rentgenu istabas temperatūrā apstarotā L i B a F 3 kristālā radīta defekta EPR spektrs. EPR spektrs sastāv no apmēram 35 ekvidistantām līnijām. Defekts ir nestabils Jienas gaismā, bet tumsā sabrūk dažu stundu ...

    • Radioluminescence, thermoluminescence and dosimetric properties of ZnO ceramics 

      Grigorjeva, Larisa; Zolotarjovs, Aleksejs; Sokovnin, Sergei Y.; Millers, Donats K.; Smits, Krisjanis; Il'ves, Vladislav G. (Elsevier Ltd, 2017)
      Two types of ZnO ceramics were fabricated and characterized by XRD, SEM methods. The radioluminescence spectra were measured within the 300–550 K range. The defect luminescence band peaking at ~2.35 eV is the dominant one ...

    • Raman spectral identification of phase distribution in anodic titanium dioxide coating 

      Knoks, Ainars; Kleperis, Janis; Grinberga, Liga (Estonian Academy of Sciences, 2017)
      Growing need for cleaner environment and energy production has brought about a hunt for perspective materials. One of such perspective materials is titanium dioxide (TiO2, titania) due to its chemical stability and ...

    • Re-Evaluation of Chromium Doped Alumina for Dosimetric Applications 

      Einbergs, E.; Zolotarjovs, Aleksejs; Bite, Ivita; Cipa, Janis; Vitola, Virginija; Laganovska, Katrina; Trinkler, Laima (De Gruyter, 2021)
      Many medical examinations involve ionizing radiation. Although the range of available dosimeters is rather wide, their linearity and chemical stability are limited. Recently, there has been a growing interest in new, ...

    • Reactive pulsed direct current magnetron sputtering deposition of semiconducting yttrium oxide thin film in ultralow oxygen atmosphere: A spectroscopic and structural investigation of growth dynamics 

      Arslan, H.; Aulika, Ilze; Sarakovskis, Anatolijs; Bikse, Liga; Zubkins, Martins; Azarov, A.; Gabrusenoks, Jevgenijs; Purans, Juris (Elsevier, 2023)
      An experimental investigation was conducted to explore spectroscopic and structural characterization of semiconducting yttrium oxide thin film deposited at 623 K (±5K) utilizing reactive pulsed direct current magnetron ...

    • Recent progress in high-pressure X-ray absorption spectroscopy studies at the ODE beamline 

      Nataf, Lucie; Baudelet, François; Polian, Alain; Jonane, Inga; Anspoks, Andris; Kuzmin, Alexei; Irifune, Tetsuo (Taylor and Francis Ltd., 2020)
      High pressure energy-dispersive X-ray absorption spectroscopy is a valuable structural technique, especially, when combined with a nano-polycrystalline diamond anvil cell. Here we present recent results obtained using the ...

    • Recent progress in understanding the persistent luminescence in SrAl2O4:Eu,Dy 

      Vitola, Virginija; Millers, Donats; Bite, Ivita; Smits, Krisjanis; Spustaka, Agnese (Taylor and Francis Ltd., 2019)
      Ever since the discovery of SrAl2O4:Eu,Dy persistent afterglow material, that can intensively glow up to 20 h, the mechanism of long-lasting luminescence has been a popular area of research. The research is focused on ...

    • Recombination luminescence of X-ray induced paramagnetic defects in BaY2F8 

      Antuzevics, Andris; Fedotovs, Andris; Berzins, Dzintars; Rogulis, Uldis; Auzins, Krisjanis; Zolotarjovs, Aleksejs; Baldochi, Sonia Licia (Elsevier B.V.Journal of Luminescence, 2020)
      Recombination luminescence (RL) and RL-detected electron paramagnetic resonance (RL-EPR) in BaY2F8 single crystal has been investigated after irradiation with X-rays at low temperature. The recombination process, which ...

    • Redukcijas princips dinamiskajās sistēmās 

      Reinfelds, Andrejs (1998)

    • Redzes efekti, Ar redzi saistītas parādības, ilūzijas, iespaidi 

      Ķikusts, Paulis (2014-04-29)
      Apkopoti dažādi ar redzi saistīti jautājumi, kuri ar studentiem pārrunāti Latvijas Universitātes Fizikas un matemātikas fakultātes Datorikas nodaļas specseminārā „Attēlu sintēze un analīze”. Jautājumi nosacīti grupējami ...

    • The Relation between Photoconductivity Threshold and Open-Circuit Voltage in Organic Solar Cells 

      Grzibovskis, Raitis; Rudušs, Armands; Polaks, Andis (De Gruyter, 2022)
      Most of the solar cell parameters (short-circuit current, fill factor, power conversion efficiency) can only be determined by creating and measuring the solar cell. However, there is an empirical relation that links energy ...

    • Reliģiozitāte Latvijā: vēsture un mūsdienu situācija 

      Aleksandrova, Viktorija; Avanesova, Jeļena; Geikina, Laima; Grīnfelde, Māra; Kiope, Māra; Krūmiņa-Koņkova, Solveiga; Misāne, Agita; Pazuhina, Nadežda; Rancāne, Aīda; Rimestad, Sebastian; Runce, Inese; Taivāne, Elizabete; Stankevičs, Zbigņevs; Vējš, Jānis Nameisis; Vuguls, Juris (LU Filozofijas un socioloģijas institūts, 2012)
      Ideja par monogrāfiju, kas aplūkotu situāciju mūsdienu akadēmiskajā reliģijpētniecībā Latvijā, radās 2011. gada oktobrī, kad Apvienotā Pasaules latviešu zinātnieku 3. kongresa un Letonikas 4. kongresa sekcijā “Reliģiozitāte ...

    • Reliģiski-filozofiski raksti, Speciālizlaidums I 

      Kļaviņš, Kaspars; Jung Ran Park; Shvets, Svitlana; Pak, Antonina; Tsoy, Inna; Guryeva, Anastasia; Baltgalve, Agita; Haijima, Agnese; Šķestere, Ildze; Lāms, Ojārs; Miuller, Karole; Taivāns, Leons Gabriels; Kumpis, Arvydas; Byoung Yoong Kang; Didvalis, Linas; Kleinhofa, Ingrīda (LU Filozofijas un socioloģijas institūts, 2022-05-22)
      A special issue, “Remembering the Past and the Future - Korean Culture in a Changing World,” is devoted to understanding Korean culture. Regardless of the bulk of comprehensive information available today, accurate knowledge ...

    • Reliģiski-filozofiski raksti, XXX 

      Latvijas Universitāte. Filozofijas un socioloģijas institūts; Krumina-Konkova, Solveiga (LU Filozofijas un socioloģijas institūts, 2021-06)
      Many distinct aspects of Korean spirituality and education in the context of cross-cultural communication were discussed at the 2nd online conference of the Baltic Association for Korean Studies (BAKS), which was held at ...

    • Reliģiski-filozofiski raksti, 17 

      Latvijas Universitāte. Filozofijas un socioloģijas institūts; Krūmiņa-Koņkova, Solveiga (LU Filozofijas un socioloģijas institūts, 2014)
      No pirmā skata varētu šķist, ka „Reliģiski-filozofisku rakstu” XVII krājums ir par bailēm. Jo ko gan citu mēs gribam sagaidīt, lasot šausmu literatūru, kā vien iespēju baidīties? Vai ko gan citu mēs izjūtam, lasot par karu ...

    • Reliģiski-filozofiski raksti, 18 

      Latvijas Universitāte. Filozofijas un socioloģijas institūts; Krūmiņa-Koņkova, Solveiga (LU Filozofijas un socioloģijas institūts, 2015)
      Izdevums veltīts starptautiskajai konferencei “Starp Austrumiem un Rietumiem: jaunatne, reliģija, politika”, kuru 2014. gada rudenī organizēja Latvijas Reliģijas pētniecības biedrība sadarbībā ar Latvijas Universitāti un ...