Browsing 2017 by Issue Date

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  • Critical current of MgB2 microbriges 
    SURDU, A.; SOKROVISCIUC, A.; ANTROPOV, E.; MIKHAILOV, M.; SIVAKOV, A.; POKHILA, A.; SIDORENKO, A. (Technical University of Moldova, 2012)
    In the present work we study the peculiarities of the critical current of MgB2 extracted from current-voltage (I-V) characteristics. The (I-V) characteristics of two parallel connected MgB2 microbriges (of 3 µm width and ...
  • Fabrication and characterization of flexible composite material based on Aerographite/InP micro-nanostructures 
    PLESCO, Irina; STROBEL, Julian; SCHÜTT, Fabian; GORCEAC, Leonid; CINIC, Boris; HIMCINSCHI, Cameliu; MISHRA, Yogendra Kumar; KIENLE, Lorenz; ADELUNG, Rainer; TIGINYANU, Ion (Technical University of Moldova, 2017)
    The goal of this work is to extend the class of flexible hybrid nanomaterials based on aerographite scaffolds. For this purpose, we developed the technological conditions for the deposition of InP:Zn micro- and nanostructures ...
  • Hydrogen detection by individual Pd-modified ZnO nanowire 
    LUPAN, Oleg; PAUPORTÉ, Thierry; POSTICA, Vasile; VIANA, Bruno; ADELUNG, Rainer; CHOW, Lee; TIGINYANU, Ion (Technical University of Moldova, 2017)
    In this work an individual Pd-modified ZnO nanowire (Pd/ZnO NW) was integrated into a nanosensor device using focused ion beam (FIB)/scanning electron microscopy (SEM) system. The Pd/ZnO arrays were synthesized by ...
  • Influence of TiO2 Ultra-Thin Films on Gas Sensing Properties of CuO:Zn 
    ABABII, Nicolai; REIMER, Tim; POSTICA, Vasile; HOPPE, Mathias; CHEMNITZ, Steffen; SONTEA, Victor; BENECKE, Wolfgang; ADELUNG, Rainer; LUPAN, Oleg (Technical University of Moldova, 2017)
    Copper oxide is a p-type metal oxide with remarkable optical, electrical, thermal and sensing properties. The oxidation of Cu2O to CuO can be performed by thermal annealing at relatively low temperatures. The present study ...
  • Pd-doped ZnO nanostructured films for multifunctional applications 
    POSTICA, Vasile; HOPPE, Mathias; ADELUNG, Rainer; PAUPORTÉ, Thierry; ABABII, Nicolai; TROFIM, Viorel; SONTEA, Victor; LUPAN, Oleg (Technical University of Moldova, 2017)
    In this work Pd-doped ZnO (ZnO:Pd) nanostructured films were deposited on pre-cleaned glass substrates via a synthesis from chemical solutions (SCS) approach from aqueous baths. The post-rowth thermal annealing, namely ...
  • Gas sensors based on optical fiber coated with nanocrystalline TiO2 and nanofibrous ZnO 
    GHIMPU, Lidia; PLESCO, Irina; URSACHI, Veaceslav; TIGINYANU, Ion; ZARRELLI, Mauro; ZOTTI, Aldobeneddetto; BORRIELLO, Anna (Technical University of Moldova, 2017)
    The paper is divided into two main sections: first, we report on magnetron sputtering of zinc oxide and titanium dioxide; second, the results of the investigation of the morphology and sensing characteristics of the optical ...
  • TUMnanoSat family for diverse educational space mission 
    SECRIERU, Nicolae; LEVINEŢ, Nicolae; CANDRAMAN, Sergiu; ILCO, Valentin; GIRSCAN, Adrian; MARGARINT, Andrei (Technical University of Moldova, 2017)
    This paper presents a brief overview of the basic features of CubeSat and their missions. It is described how to approach the various educational missions in the nanosatellites family designed at the TUM Space Technology ...
  • Pulsed Electroplating of Metal Nanoparticles form DODUCO Electrolytes 
    MONAICO, Eduard; BRINCOVEANU, Oana; MESTERCA, Raluca; URSAKI, Veaceslav; PRODANA, Mariana; ENACHESCU, Marius; TIGINYANU, Ion (Technical University of Moldova, 2017)
    The mechanisms of Au deposition on InP porous substrates during a pulsed electroplating process are investigated by means of Topography imaging and Current Mapping measurements. The obtained results confirm the formation ...
  • Nanosatellite TUMnanoSat II for tracking and measure of the orbital parameters and decline 
    SECRIERU, Nicolae; LEVINEŢ, Nicolae; MELNIC, Vladimir; CANDRAMAN, Sergiu; ILCO, Valentin; GIRSCAN, Adrian; MARGARINT, Andrei (Technical University of Moldova, 2017)
    This paper reflects the development of the TUMnanoSat II nanosatellite at the TUM Space Technology Center with a special research and educational mission - determining the decline of nanosatellite orbit using the optical ...
  • Remote control and monitoring of irrigation process operation and control system architecture 
    SECRIERU, Nicolae; LEVINEŢ, Nicolae; CANDRAMAN, Sergiu; ILCO, Valentin; GIRSCAN, Adrian; MARGARINT, Andrei (Technical University of Moldova, 2017)
    This paper reflects the development results of the irrigation processes automating platform for the plantations, which can be very user-friendly to optimize these processes and minimize irrigation costs and therefore serves ...
  • Особенности обработки экспериментальных данных с помощью оконных функций 
    ШЕСТАКОВА, Т.; СОРОКИН, Г.; ГРИЦКОВ, С. (Technical University of Moldova, 2017)
    В работе рассмотрены принципы обработки экспериментальных данных с помощью различных оконных функций. Показано как правильно выбирать оконные функции исходя из динамического диапазона сигнала и размера выборки дискретного ...
  • Analiza performanţelor sistemului automat cu modele de obiecte aproximate după răspunsul experimental al procesului 
    IZVOREANU, Bartolomeu; POTLOG, Mihail; COJUHARI, Irina; FIODOROV, Ion; MORARU, Dumitru (Technical University of Moldova, 2017)
    În lucrare se analizează performanţele sistemului automat construit pe baza modelelor obiectelor de reglare de ordinal unu şi doi pentru răspunsul experimental al procesului. Se analizează două exemple de modele ale ...
  • Dirijarea optimală a proceselor ondulatorii prin aplicarea principiului maxim Pontreaghin 
    CEBAN, Gheorghi (Technical University of Moldova, 2017)
    Este propusă o metodă bazată pe principiul de maxim Pontreaghin de determinare a dirijării optimale după frontieră şi a proceselor ondulatorii optimale în sistemele cu dirijare optimală cu parametri distribuiţi, dinamica ...
  • Marcarea sentimentelor în text: emoţiile autorului şi opinia cititorului 
    BOBICEV, Victoria; CARCEA, Liviu (Technical University of Moldova, 2017)
    Analiza automată a sentimentelor este o direcţie de cercetare foarte activă în ultimii ani. Însă sentimentele sunt subiective şi greu de analizat automat. Textele sunt marcate manual şi apoi utilizate ca sursa pentru ...
  • Термоэлектрическая эффективность полупроводниковых нитей Bi1-xSbx 
    ПОПОВ, Иван; БОДЮЛ, Павел; МОЛОШНИК, Евгений; ПАРА, Георгий; ИСТРАТИЙ, Евгений (Technical University of Moldova, 2017)
    В работе представлены исследования температурных зависимостей термоэлектрических свойств монокристаллических нитей Bi1-xSbx в стеклянной оболочке различных составов с диаметром 1,5 мкм. Монокристаллические нити Bi1-xSbx в ...
  • Dezvoltarea tehnologiilor satelitare în cadrul Universităţii Tehnice a Moldovei 
    BOSTAN, Ion; BOSTAN, Viorel; SECRIERU, Nicolae; CANDRAMAN, Sergiu; MARGARINT, Andrei (Technical University of Moldova, 2017)
    În majoritatea țărilor Europene preocupările în domeniul tehnologiilor spațiale câștigă tot mai mult teren, atrăgând în sfera cercetării noi adepți, în special în rândul tinerilor cercetători. În acest context, în cadrul ...
  • Radiative Transitions in Sm2+ Doped ZnAl2Se4 and KCl Crystals 
    TIRON, Andrew; ZALAMAI, Victor; RUSU, Emil; SYRBU, Nicolae; BEJAN, Nicolae (Technical University of Moldova, 2017)
    Photoluminescence spectra of ZnAl2Se4:Sm2+ and KCl:Sm2+ due to the processes of charge carriers recombination from levels 5Dj,5Lj,5Gj and 5Hj (4f55d1) on levels 7Fj of samarium ions were investigated. The broad photoluminescence ...
  • Resonance Raman Scattering and Excitons Optical Orientation in CuGaSe2 Crystals 
    ZALAMAI, Victor; SYRBU, Nicolae; Tiron, Andrew; DOROGAN, Valerian (Technical University of Moldova, 2017)
    Resonance Raman and luminescence spectra of CuGaSe2 crystals measured at 9 K and excited by He-Ne (632.8 nm) and Ar+ (514.5 nm) lasers were investigated. Excitons parameters in the region of A, B and C excitonic series ...
  • Microwire measurement device 
    DOROGAN, Valerian; MUNTEANU, Eugeniu; ZAPOROJAN, Sergiu; TINCOVAN, Sergiu; SECRIERU, Vitalie; GORGAN, Dumitru (Technical University of Moldova, 2017)
    A new method is proposed for analyzing and measuring the microwire core diameter and glass coat thickness. Two light beams in visible spectrum are used for measurement of core diameter. The analysis and measurement of glass ...
  • Optical fibers and dispersion in optical fibers Types of dispersion 
    MOROZAN, Pavel; SOROCHIN, Serafima; LACHI, Arina; SAVA, Lilia (Technical University of Moldova, 2017)
    In this paper ensue to be characterized all types of optical fibers and their features, also the phenomenon of dispersion and the reasons of its appearance or occurance. By means of all pictures shown below in the paper, ...

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