Articole ştiinţifice: Recent submissions

  • Weak reflexive subcategory 
    BUTNARU, Dumitru; ŢURCANU, Alina (Universitatea de Stat din Moldova, 2021)
    In the subcategory of topological vector locally convex spaces Hausdorff are built proper classes of weakly reflective and weakly coreflective subcategories, respectively. We proved that the right product of two subcategories ...
  • Web application performance analysis 
    CERBU, Anatolie; PERLOG, Valentin (Universitatea de Stat din Moldova, 2021)
    Speed counts on mobile devices, but the perception of speed is just as important. A web application, like any other product, has features that directly or indirectly influence the business of owners. To meet market ...
  • Information security in IoT 
    CERBU, Olga; TUREŢCHI, Gabriel; IORDAN, Dan; GHIDERMAN, Valeria (Universitatea de Stat din Moldova, 2021)
    The Internet of Things or IoT refers to physical devices that are connected to the Internet, all collecting and sharing data, turning anything into an IoT component.
  • Aplicaţiiile numerelor complexe in rezolvarea diferitor probleme 
    CORLAT, Andrei; JARDAN, Ion (Universitatea de Stat din Moldova, 2021)
    În această lucrare sunt considerate trei tipuri de probleme. Primul grup reprezintă probleme cu numere complexe. In al doilea grup sunt incluse probleme din diferite compartimente ale matematicii. În ultimul grup au fost ...
  • Adaptive computing model for distributed and real-time applications 
    ŢURCAN, Ana; NISTIRIUC, Ana (Universitatea de Stat din Moldova, 2021)
    The distributed computing systems as based on real-time applications provide advantageous solutions for complex process control. Such systems are a multitude of heterogeneous nodes that are integrated into data processing ...
  • Membrane computing model based on JSON language 
    MUNTEANU, Silvia (Universitatea de Stat din Moldova, 2021)
    The JSON model gives a possibility to save the topology of the Membrane computing system to files, to organize the exchange of topologies between different applications and to realize dynamical processes in the topology thereof.
  • Maximizing a neural network's accuracy and boosting the learning process for detecting the absolute colour similarity based on the centroids of normal distributions 
    SCROB, Sergiu; LISNIC, Inga; LEAHU, Alexei (Universitatea de Stat din Moldova, 2021)
    Our aim is to demonstrate that the ANN is prone to converge faster and with a higher level of accuracy using training data where tuples of triplets also represents the centroids of those 12 colour classes, considering each ...
  • Automation of Wastewater Treatment Plan 
    MOLDOVAN, Artiom; NUCA, Ilie (IEEE, 2019)
    In this project, the problem was the realization of a SCADA (Supervisory Control and Data Acquisition) system and automation system that will reduce the costs of maintenance, will increase energy efficiency and will help ...
  • Development of Electrotechnical Industry, Research and Education in the Republic of Moldova 
    TODOS, Petru; NUCA, Ilie; NUCA, Iurie (IEEE, 2019)
    In 2019, 55 years have passed since the founding of the Technical University of Moldova and 60 years since the adoption of the strategic decisions regarding the creation in the republic of a dominant electrical industry ...
  • Electrical Buses: Development and Implementation in Chisinau Municipality, Moldova 
    EŞANU, Vitalie; MOTROI, Alexandru; NUCA, Ilie; NUCA, Iurie (IEEE, 2019)
    The paper refers to the elaboration, implementation and use of electric buses. The main particularities and trends in the field are examined and presented, after which the developed general structure of the traction and ...
  • Compact and Controllable Electric Lines 
    POSTOLATY, Vitaly M.; BYCOVA, Elena V.; BERZAN, Vladimir (IEEE, 2019)
    The development of energy transport infrastructure is based on innovative solutions and technologies that provide higher indicators of energy efficiency. The purpose of the paper is to present and argue the basic principles ...
  • Millimeter-wave receiver based on a folded dipole antenna and Schottky diode for maximum power transfer 
    MONTERO-de-PAZ, J.; UGARTE-MUÑOZ, E.; GARCIA-MUÑOZ, L. E .; SEGOVIA-VARGAS, D.; SCHOENHERR, D.; OPREA, I.; AMRHEIN, A.; COJOCARI, O.; HARTNAGEL, H. L. (IEEE, 2012)
    In this article a millimeter-wave (mm-wave) receiver based on a folded dipole antenna, zero bias Schottky diode and silicon (Si) lens is presented. The antenna is designed in such a way that its input impedance is equal ...
  • High-Power MM-Wave Sources based on Schottky Diodes 
    COJOCARI, Oleg; MORO-MELGAR, Diego; OPREA, Ion; HOEFLE, Matthias; RICKES, Martin (IEEE, 2018)
    A novel approach has been developed at ACST for realization of high-power frequency multipliers in MM/SubMM-Wave range. This approach is based on discrete Schottky structures with monolithically-integrated diamond heatspreader. ...
  • Heterostructure equivalence of step-recovery diodes for ballistic and diffusive electron resonance - a new concept for THz signal generation 
    HARTNAGEL, H. L.; SCHMIDT, L.-P.; NICOLAE, B.; OPREA, I.; SCHONHERR, D.; ONG, D. S.; SCHUR, J.; RUF, M. (IEEE, 2008)
    A heterostructure equivalent to the well-known step recovery diode principle, arranged as a double structure gives a new nonlinear device for highly efficient harmonic THz signal generation. Like in the case of step recovery ...
  • The Influence of Temperature, Storage Conditions, pH, and Ionic Strength on the Antioxidant Activity and Color Parameters of Rowan Berry Extracts 
    CRISTEA, Elena; GHENDOV-MOSANU, Aliona; PATRAS, Antoanela; SOCACIU, Carmen; PINTEA, Adela; TUDOR, Cristina; STURZA, Rodica (MDPI (Basel, Switzerland), 2021)
    Recent trends in the food industry combined with novel methods in agriculture could transform rowan into a valuable raw material with potential technological applications. Thus, the aim of this research was to investigate ...
  • Single-Chip 135-160 GHz Doubler with more than 150 mW Output Power based on Discrete Schottky Diodes 
    MORO-MELGAR, D.; COJOCARI, O.; OPREA, I.; RICKES, M.; HOEFLE, H. (IEEE, 2018)
    Single chip doubler based on novel diamond-based discrete Schottky diodes is presented here. CVD Diamond technology has been integrated by ACST GmbH in the discrete diode structure to implement in high power multipliers ...
  • Resonant tunneling transport in ZnxBe1-xSe/ZnSe/ZnyBe1-ySe asymmetric quantum structures 
    SIRKELI, Vadim P.; YILMAZOGLU, Oktay; AL-DAFFAIE, Shihab; OPREA, Ion; ONG, Duu Sheng; KÜPPERS, Franko; HARTNAGEL, Hans L. (International Society for Optics and Photonics, 2017)
    II-VI compounds are promising materials for the fabrication of room-temperature terahertz devices due to their beneficial properties like as type-I conduction band alignment, high breakdown field strength (~331 kV/cm for ...
  • Qualification of Direct Detection Technology for ESA MetOp-SG Space Mission 
    HOEFLE, Matthias; RICKES, Martin; OPREA, Ion; COJOCARI, Oleg (International Symposium on Space Terahertz Technology, ISSTT, 2017)
    This contribution presents the ACST 89 GHz Schottky detector module performance and pre-qualification results towards the second European meteorological operational satellite program MetOp-SG. The detector flight module ...
  • Internal quantum efficiency enhancement of InGaN/GaN LEDs with Mg-Si pin-doped GaN quantum barrier 
    KÜPPERS, F.; SIRKELI, V. P.; YILMAZOGLU, O.; AL-DAFFAIE, S.; OPREA, I.; ONG, D. S.; HARTNAGEL, H. L. (Institutul de Fizică Aplicată al AŞM, 2018)
    In this work we study numerically the effect of Mg-Si pindoping of GaN quantum barrier within InGaN/GaN multi quantum wells (MQWs) on the internal quantum efficiency (IQE) of LEDs in comparison with LED devices with undoped, ...
  • High Power Discrete Schottky Diodes Based 275-305 GHz Transceiver for FMCW-Rada 
    MORO-MELGAR, D.; COJOCARI, O.; OPREA, I.; HOEFLE, H.; RICKES, M. (IEEE, 2018)
    A heterodyne 275-305 GHz transceiver intended for frequency modulated continuous wave radar applications is presented here. A commercial E-band active multiplication chain is used to provide the required power and frequency ...

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