2005: Recent submissions

  • Coaxial microwire with the bimetallic sheath 
    COLPACOVICI, Iulian; AVRAM, Ion; GRITCO, Roman; PARVAN, Vladimir; GORODENCO, Oxana (Technical University of Moldova, 2005)
    The bimetallic sheath of a coaxial microwire have an influence on its parameters. Thickness and properties of a magnetic covering of the sheath influence on value of line-ar inductance and wave resistance, attenuation and ...
  • Metrological polar - coordinates impedance simulators 
    NASTAS, Vitalie (Technical University of Moldova, 2005)
    The paper contains analysis of two types of metrological polar - coordinate impedance simulators: with current control and with voltage control. Synthesis of the impedance simulators circuits is considered. The offered ...
  • Ring cavity excitability and coherence resonance. Applications to communication systems 
    TRONCIU, V .Z.; ABRAM, R. A.; RUSU, S. S.; BARDETCHI, P. I. (Technical University of Moldova, 2005)
    We discuss the phenomena of excitability and coherence resonance of a nonlinear ring cavity where excitons and biexcitons are created. A bifurcation analysis of the ring cavity dynamics demonstrates both the existence of ...
  • Tuning of controllers to the fourth order advance delay objects with nonminimal phase and astatism 
    IZVOREANU, Bartolomeu; FIODOROV, Ion; COJUHARI, Irina; TONU, Svetlana (Technical University of Moldova, 2005)
    A procedure of tuning of linear controllers to the fourth order advance delay objects’ models with nonminimal phase and astatism is proposed in this paper. The object is presented with transfer function that contains one ...
  • Political and sociological prognostication with use of artificial intellect 
    SHOLARI, Evgheni (Technical University of Moldova, 2005)
    In the work the essence problem of prognostication, and also an opportunity of use of neural networks in political and sociological prognostication is examined. Also the traditional methods applied in political and ...
  • Hydrogen detector based on GaN nanocones 
    POPA, V.; VOLCIUC, O.; SONTEA, V.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    In this paper, we demonstrate that using GaN nanocone morphology obtained by photo electrochemical etching, it is possible to obtain very stable and easy in manufacturing gas sensors, in particular for hydrogen detection.
  • Mechanisms of enhancement of nonlinear optical response in nanostructured III-V compounds 
    SERGENTU, V.; KRAVETSKY, I.; URSAKI, V.; SIRBU, L.; VOLCIUC, O.; POPA, V.; TIGINYANU, I. M.; BOYD, Robert W. (Technical University of Moldova, 2005)
    The goal of this paper is to propose a new mechanism of nonlinear optical properties enhancement in nanostructured semiconductors based on the concept of photonic crystals (PC). The photonic crystal is usually formed as a ...
  • Nanolayers of the Au0x0SnO2 nanocomposite synthesized by successive ionic layer deposition method 
    TOLSTOY, V.; GULINA, L.; KOROTCENKOV, G. (Technical University of Moldova, 2005)
    We studied possibilities of SILD (successive ionic layer deposition) technology for depositing nanocomposite Au0xSnO2 nanolayers. This new method of layer deposition is of high interest, because of the method’s simplicity, ...
  • Tunable laser diodes on the basis of III-V heterostructures 
    VIERU, Stanislav; VIERU, Tatiana; DOROGAN, Valerian (Technical University of Moldova, 2005)
    This paper describes the fabrication technique and operating characteristics of tunable sources on the basis of III-V with central emission wavelength 835nm and 980 nm. The laser diodes were realized using gain-guided ...
  • Evolution of scanning and of the probe microscope checking methods of the electronic products 
    ARMENCEA, Nicolae (Technical University of Moldova, 2005)
    It is organized comparative analysis of possibilities, merits and demerits of the laser scanning and electronic microscopic methods of checking the electronic products. There are considered the principles of operation of ...
  • Luminescence and trapping of light in porous InP networks 
    MONAICO, E.; URSAKI, V. V.; BURLACU, A.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    In this paper we investigate the effect of light trapping inside highly scattering InP porous layers on the luminescence properties of the material.
  • Luminescence of porous ZnSe layers 
    MONAICO, E.; URSAKI, V. V.; BURLACU, A.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    In this paper we compare the luminescence properties of bulk ZnSe crystals and porous layers prepared by photon-assisted electrochemical etching.
  • Luminescent properties of triple semiconductors under the action of X rays 
    MACIUGA, A.; RADU, R.; PÎNTEA, V.; STRATAN, I.; NISTIRIUC, I. (Technical University of Moldova, 2005)
    This article focuses on the description of triple semiconductors of type, especially , and the researeh instalation over luminescent properties under the action of accelerated electrons and X-rays. VI III II C B A 4 2 4 2 S CdGa.
  • Peculairities of impurity influience in weakly degenerated systems 
    BODIUL, Pavel; PEEV, Leonid (Technical University of Moldova, 2005)
    It is experimentally found that small additions to bismuth of elements of the IV and VI groups lead to such change in concentration of free charge carriers that it is less than one electron per atom and considerably depends ...
  • Thermower in weacly degenerated systems 
    BODIUL, Pavel; PEEV, Leonid (Technical University of Moldova, 2005)
    Doping of semimetals with impurities of the IV and VI groups considerably influences kinetic properties of these systems and it is one of the methods for investigation of peculiarities of the free carrier band spectrum. ...
  • Electron and lattice properties of weakly degenerated systems at low temperatures 
    BODIUL, P.; SOROCHIN, S.; COTÎRŞEV, S.; CEBOTĂREANU, A.; ODAINÎII, G.; CEOBANU, S. (Technical University of Moldova, 2005)
    In the present paper two independent methods were used. By the field and temperature dependences of the phonon thermopower in the ultraquantum limit (UQL) and by the temperature dependence of the size-sensitive part of ...
  • Recombinational radiation in doped crystals of zinc diphosphide 
    PEEV, L. G. (Technical University of Moldova, 2005)
    In the case of semiconductors with an indirect energy gaps of interdicted zones of the type ZnP2 (D84) optical transition with absorption and emission of phonons are found in the free exiton zone. In the case of alloyed ...
  • Chalcogenide semiconductors as gas sensors 
    TSIULYANU, Dumitru (Technical University of Moldova, 2005)
    A brief survey of experimental results to gas sensing with chalcogenide semiconductor based devices is given. It is pointed out that physical phenomena such as electrical conductivity can be coupled to chemical reactions ...
  • Effect of contacts and thickness on the NO2 sensing properties of tellurium based films 
    TSIULYANU, Alexantru (Technical University of Moldova, 2005)
    The influence of contacting materials, and thickness of the tellurium based films on their electrical conductivity and sensitivity to NO2 is given. It is shown that until thickness is below 100 nm the conductivity increases ...
  • Exciton-phonon spectra in CuIn1-XGaXS2 crystals 
    NEMERENCO, L. L. (Technical University of Moldova, 2005)
    In this work, the wave-length derivative reflection (WDR) spectra of CuIn1-xGaxS2 crystals have been investigated in the region of A, B and C series. The n = 1, n = 2 and n = 3 states are determined and centers of exciton ...

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