Browsing Articole ştiinţifice by Title

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  • Energia solară şi sistemele fotovoltaice de conversie cu eficienţă sporită 
    BOSTAN, Ion; DULGHERU, Valeriu; DICUSARĂ, Ion; COZMA, Ion (Institutul de Energetică al Academiei de Științe a Moldovei, 2012)
    Aproximativ cu 50 milioane de oameni în fiecare an creşte populaţia mondială, iar acest fapt conduce la o creştere a necesarului şi, implicit, a consumului mondial de energie. Principalele surse de energie valorificate şi ...
  • Energia solară: alternativă energetică viabilă la sursele de energie convenţionale 
    PORCESCU, Gavril (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova, 2012)
    Energia devine din ce în ce mai scumpă, iar producţia ei în baza tehnologiilor tradiţionale accentuează dezastrul ecologic distrugând echilibrul climatic global. Menţionăm aici avertismentul lui Yvo de Boer, comisar ONU ...
  • Energy band structure and Frenkel excitons in PbGa2S4 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; PARVAN, V. I.; ZALAMAI, V. V. (ELSEVIER, 2012)
    Optical reflection spectra are measured and calculated in PbGa2S4 crystals in the region of resonances related to excitons with large oscillator strength and binding energy (Frenkel excitons). The splitting of the upper ...
  • Energy band structure and optical constants of ZnAs2 crystals 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; DOROGAN, A. V. (ELSEVIER, 2012)
    The fine structure of the Fabry–Perot interference as well as the interference of ordinary and extraordinary waves is investigated in ZnAs2 crystals. ε1, ε2, n and k optical constants are calculated in a wide spectral range ...
  • Energy Band Structure of CuInS2 Crystals 
    SYRBU, N. N.; CRETU, R. V.; TEZLEVAN, V. E. (John Wiley & Sons, Inc., 1998)
    In this work the reflectivity spectra and wave-length derivative reflectivity (WDR) spectra of CuInS2 crystals have been investigated in the region E ≥ Eg. The n = 1, n = 2 and n = 3 excitonic states are determined and ...
  • Energy Band Structure of the Tetragonal Crystals ZnP2 and CdP2 
    SOBOLEV, V. V.; SYRBU, N. N.; SUSHKEVICH, T. N. (John Wiley & Sons, Inc., 1971)
    The anisotropic spectra of edge absorption, photoconductivity, emission, and reflectivity of the tetragonal ZnP2 and CdP2 crystals have been experimentally investigated in the range 1 to 12.5 eV. The selection rules for ...
  • Energy complex adaptation to climate change in Republic of Moldova 
    GUTSU, Aurel; GUTSU-CHETRUSHCA, Corina (Institutul de Energetică al Academiei de Științe a Moldovei, 2016)
    Some of the main projected effects of Climate Changes in Moldova by late XXI century will include surface temperature increase by as much as 5.6 K, and decrease in water availability by up to 55 %, which, on the one hand ...
  • The energy efficiency promotion in buildings 
    TÎRŞU, Mihai; POSTORONCA, Sveatoslav; MARTNOS, Ion (Universitatea Tehnică „Gheorghe Asachi” din Iaşi, 2015)
    In the paper the solutions how to decrease the energy consumption for the most common types of buildings in urban areas of The Republic of Moldova using the modern practice of improving energy efficiency are shown. Here ...
  • Energy intensity in Moldova 
    MOGOREANU, Nicolae (Institutul de Energetică al Academiei de Științe a Moldovei, 2012)
    There is no doubt that quantitative expansion of economies is increasingly destructive and without undertaking measures for efficient energy consumption fauna and flora will be subject to the essential changes that will ...
  • Energy saving in wastewater treatment plants 
    CIOBANU, Natalia (Web of Conferences, 2020)
    This paper uses data from the Chisinau Wastewater Treatment Plant (WWTP) (2018 year) to analyze the potential for energy recovery from wastewater treatment plant via anaerobic digestion with biogas utilization with electricity ...
  • Energy Transition - Advantages and Challenges for the Republic of Moldova 
    ARION, Valentin; EFREMOV, Cristina (IEEE, 2019)
    The paper presents a description of the most important elements related to the global energy transition and to the need of integrating the Republic of Moldova into this wide process of society transformation.
  • Engineering linguistics 
    CIJACOVSCHI, Valentin; PROCOPCIUC, Vladimir (Universitatea Liberă Internațională din Moldova, 2011)
    Engineering linguistics as a compound part of the general linguistics has a special place due to the fact that it is meant to solve specific issues, using programming automaton on one hand, the main problem being ...
  • Engineering porous III-Vs 
    FÖLL, H.; LANGA, S.; CARSTENSEN, J.; LÖLKES, S.; CHRISTOPHERSEN, M.; TIGINYANU, I. M (ELSEVIER, 2003)
    Porous semiconductors exhibit new and unexpected properties compared to the bulk materials. In III-Vs, many, many new features with respect to optical properties have emerged during the last few years for certain pore ...
  • Engineering the morphology of porous InP for waveguide applications 
    LANGA, S.; LÖLKES, S.; CARSTENSEN, J.; HERMANN, M.; BÖTTGER, G.; TIGINYANU, I. M.; FÖLL, H. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2005)
    We research the possibilities for engineering the morphology of porous structures in n-InP. Lithographic patterning of the sample surface before anodic etching is shown to modify considerably the electric field distribution ...
  • Enhanced Emission Properties of Anodized Polar ZnO Crystals 
    ZALAMAI, V. V.; COLIBABA, G. V.; MONAICO, E. I.; MONAICO, E. V. (Springer Nature Switzerland, 2021)
    Polar ZnO single crystals were microstructured in a controlled fashion by electrochemical etching. Surfaces with pyramids and inversed pyramids on oxygen and zinc faces, respectively, were received. Photoluminescence spectra ...
  • Enhanced ethanol vapour sensing performances of copper oxide nanocrystals with mixed phases 
    LUPAN, Oleg; CRETU, Vasilii; POSTICA, Vasile; ABABII, Nicolai; POLONSKYI, Oleksandr; KAIDAS, Victor; SCHÜTT, Fabian; MISHRA, Yogendra K.; MONAICO, Eduard; TIGINYANU, Ion; SONTEA, Victor; STRUNSKUS, Thomas; FAUPEL, Franz; ADELUNG, Rainer (ELSEVIER, 2016)
    The present study reports on nano-crystalline copper oxide thin films via a simple synthesis from chemical solutions (SCS) followed by two types of thermal annealing, namely rapid thermal annealing (RTA) and conventional ...
  • Enhanced internal second harmonic generation in InGaAs/GaAs/AlGaAs strained single-quantum-well buried-heterostructure laser diodes 
    ISPASOIU, Radu G.; PUSCAS, Niculae N.; SMEU, Emil; BOTEZ, C. E.; IACOVLEV, Vladimir P.; MEREUTZA, Alexandru Z.; SURUCEANU, Grigore I. (SPIE, 1998)
    In this paper we report an indirect method based on photomultiplier response calibration to measure the radiant power of the internal second harmonic generation (ISHG) from InGaAs/GaAs/AlGaAs strained single quantum well ...
  • Enhanced radiation hardness of ZnO nanorods versus bulk layers 
    BURLACU, A.; URSAKI, V. V.; LINCOT, D.; SKURATOV, V. A.; PAUPORTE, T.; RUSU, E.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008)
    It is shown that ZnO nanorods grown by MOCVD exhibit enhanced radiation hardness against high energy heavy ion irradiation as compared to bulk layers. The decrease of the luminescence intensity induced by 130 MeV Xe+23 ...
  • Enhanced UV and ethanol vapour sensing of a single 3-D ZnO tetrapod alloyed with Fe2O3 nanoparticles 
    LUPAN, Oleg; POSTICA, Vasile; GRÖTTRUP, Jorit; MISHRA, Abhishek K.; DE LEEUW, Nora H.; ADELUNG, Rainer (ELSEVIER, 2017)
    Fabrication of multifunctional devices based on nano- and microstructures of a single semiconducting oxide is an important step for a better understanding of their maximum sensing properties and the base for the development ...
  • Enhancement of the critical current density in FeO-coated MgB2 thin films at high magnetic fields 
    SURDU, Andrei E.; HAMDEH, Hussein H.; AL-OMARI, Imad A.; SELLMYER, David J.; SOCROVISCIUC, Alexei V.; PREPELITA, Andrei A.; KOPARAN, Ezgi T.; YANMAZ, Ekrem; RYAZANOV, Valery V.; HAHN, Horst; SIDORENKO, Anatolie S. (Beilstein Institute for the Advancement of Chemical Sciences, Germany, 2011)
    The effect of depositing FeO nanoparticles with a diameter of 10 nm onto the surface of MgB2 thin films on the critical current density was studied in comparison with the case of uncoated MgB2 thin films. We calculated the ...

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