Articole din publicaţii internaţionale: Recent submissions

  • Analysis of self-pulsation characteristics of InGaN laser diode 
    TRONCIU, V. Z.; YAMADA, Minoru; ABRAM, R. A. (American Physical Society, 2004)
    We report the results of numerical investigations of the dynamical behavior of a blue-violet InGaN laser with a specially incorporated saturable absorber. We have identified the nature of the bifurcation that occurs in the ...
  • Analysis of self-pulsation characteristics of InGaN laser diode 
    TRONCIU, V. Z.; YAMADA, Minoru; OHNO, Tomoki; ITO, Shigetoshi; KAWAKAMI, Toshiyuki; TANEYA, Mototaka (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2003)
    Self-pulsation characteristics of InGaN laser diode emitting at 395 nm wavelength are investigated theoretically and experimentally. The laser structure consists of a multi-quantum well InGaN active layer and an InGaN ...
  • A theoretical and experimental investigation of the dynamics of tandem blue–violet lasers 
    TRONCIU, V. Z.; YAMADA, Minoru; KAWAKAMI, Toshiyuki; ITO, Shigetoshi; OHNO, Tomoki; TANEYA, Mototaka; ABRAM, R. A. (Elsevier, 2004)
    Theoretical and experimental investigations have been carried out to study the dynamics of blue–violet lasers with two regions that are adjacent in the longitudinal direction. The theoretical results show that both CW and ...
  • Excitonic and band parameters in SnSe crystals 
    SYRBU, N. N.; ZALAMAI, V. V. (Elsevier, 2020)
    In the present work, absorption, reflection and wavelength modulated transmission spectra in wide temperature range 300–10 K in regions of the band gap minimum and of transitions to the excitonic band were studied.
  • 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 ...
  • Degree of mode localization in Random lasing from ZnO nanoparticles 
    FALLERT, Johannes; SARTOR, Janos; DIETZ, Roman J. B.; SCHNEIDER, Daniel; ZALAMAI, Victor; KLINGSHIRN, Claus; KALT, Heinz (IEEE, 2009)
    We present an experimental procedure to directly extract the degree of localization of random laser modes in ZnO powders. Strongly localized and extended modes are found to coexist within the same ensemble area.
  • Dynamics of a laser-cooled and trapped radiator interacting with the Holstein–Primakoff SU(1,1) coherent state 
    KOROLI, V. I.; ZALAMAI, V. V. (IOP Publishing, 2009)
    We study the interaction between a laser-cooled and trapped equidistant three-level atom (ion) and a single-mode cavity field. The dipole moment matrix transition elements between the adjacent atomic energy levels d12 and ...
  • Development, manufacture and testing of horizontal axis wind microturbines with power of 10 kw 
    BOSTAN, Ion; DULGHERU, Valeriu; SOBOR, Ion; BOSTAN, Viorel; SOCHIREANU, Anatol (Universitaria, 2011)
    Under the circumstances of the total energetic recourses deficit in the Republic of Moldova appears the problem of non-traditional sources utilization recovered by energy. Important sources of renewable energy are the ...
  • Vertical Axis Wind Turbines. Optimal Positioning of the Blades Defined by Asymmetrical Airfoils 
    BOSTAN, Viorel; BOSTAN, Ion; RABEI, Ivan; GUTU, Marin; DULGHERU, Valeriu (Springer Nature Switzerland, 2020)
    Many Vertical Axis Wind Turbines (VAWTs) have blades defined by asymmetrical (cambered) airfoils. There can be two possibilities regarding the orientation of their camber in relation to the rotor’s axis: radially inward ...
  • Use of Renewable Energy: World, European and National Perspectives 
    BOSTAN, Ion; GHEORGHE, Adrian; DULGHERU, Valeriu; SOBOR, Ion; BOSTAN, Viorel; SOCHIREAN, Anatolie (Springer Nature Switzerland, 2013)
    Energy conversion, consumption and conservation: The Law of Conservation of Energy is one of fundamental laws of physics: in physical processes energy cannot be destroyed or decreased, it can be converted (transformed) ...
  • The Photovoltaic Greenhouses - a Challenge for Republic of Moldova 
    BOSTAN, Ion; GUŢU, Aurel; GUŢU-CHETRUŞCA, Corina (IEEE, 2019)
    The photovoltaic greenhouses that emerged at the beginning of the century as a way of arable land preservation through the concordance between electricity generation and crop growth have shown a number of advantages for ...
  • Technologies for precessional planetary transmissions toothing generation 
    BOSTAN, Ion; MAZURU, Sergiu; SCATICAILOV, Sergiu (Ştefan cel Mare University, Suceava, Romania, 2013)
    Development of precessional planetary transmissions, in their evolution from conceptual idea to production, imposed the necessity of extending the area of scientific research in various fields, including the technological ...
  • Study of the analytical description of nestandard tooth profile by using the system of equations 
    BOSTAN, Ion; DULGH, Valeriu (Technical University of Cluj-Napoca, 2013)
    The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of mechanical transmission – planetary precessional transmissions with multicouple gear. In this paper, the ...
  • Some technologies for industrial implementation in the area of Satu-Mare. Computer Aided Design for Development & Education. Virtual Approaches 
    BOSTAN, I.; IONESCU, F.; DULGHERU, V.; PFEIFFER, A.; STARK, M.; CONSTANTIN, G.; STEFANOIU, D. (Intern. Sympos. on Social . Develop. & Economic Performance, 2008)
    The paper presents recent achievements on three convergent technological fields: The 1st one deals with the high productive installation for production of spiral of pipe-lines, their design and process control; The 2nd one ...
  • Some research on finite element analysis of composite materials 
    DULGHERU, Valeriu; BOSTAN, Viorel; GUTU, Marin (Galaţi University Press, 2012)
    The aim of this paper is to verify the accuracy of composite materials data input into ANSYS Parametric Design Language for the numerical analysis. For this purpose, some specimens of the laminated composite were subjected ...
  • Some Aspects Regarding Torque Study and Elaboration of the Blades Orientation Mechanism for Microhydropower Plant 
    BOSTAN, Viorel; BOSTAN, Ion; DULGHERU, Valeriu; CIOBANU, Oleg (Science Publishing Group, 2020)
    The analysis of hydraulic energy conversion systems has demonstrated the opportunity for the development of water kinetic energy conversion systems compared to potential energy conversion systems. Insistent searches of ...
  • Some aspects regarding planetary precessional transmissions dynamics 
    BOSTAN, I.; DULGHERU, V.; MALCOCI, I. (IOP Publishing, 2021)
    A mechanical system theoretically should not generate any vibrations and noise to be considered dynamically an ideal system, because vibrations mean a loss of energy. In planetary precessional reducers vibration can appear ...
  • Some aspects regarding the elaboration of multiple precessional gear theory and modern manufacturing technology 
    BOSTAN, Ion; DULGHERU, Valeriu ("Dunărea de Jos" University, Galaţi, 2006)
    The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model ...
  • Sea Waves Energy 
    BOSTAN, Ion; GHEORGHE, Adrian; DULGHERU, Valeriu; SOBOR, Ion; BOSTAN, Viorel; SOCHIREAN, Anatolie (Springer Nature Switzerland, 2013)
    The largest energy reserves are stored in the oceans – a large area of water currents continuously moving and covering about 71% of the planet’s surface. The Planet Ocean has a huge energy potential that can be employed ...
  • Safety aspects of kinematic planetary precessional transmissions with plastic wheels 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion ("Dunărea de Jos" University, Galaţi, 2012)
    The planetary precessional transmissions represent a new principle type of the mechanical transmissions. The specificity of the relative sphere-spatial movement of the precessional gearing elements makes the sliding friction ...

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