Colecția instituțională: Recent submissions

Now showing items 101-120 of 10107

Ultrathin tin sulfide field-effect transistors with subthreshold slope below 60 mV/decade

DRAGOMAN, Mircea; DINESCU, Adrian; AVRAM, Andrei; DRAGOMAN, Daniela; VULPE, Silviu; ALDRIGO, Martino; BRANISTE, Tudor; SUMAN, Victor; RUSU, Emil; TIGINYANU, Ion (Institute of Physics, 2022)

In this paper, we present for the first time a field-effect-transistor (FET) having a 10 nm thick tin sulfide (SnS) channel fabricated at the wafer scale with high reproducibility. SnS-based FETs are in on-state for ...
The microwave properties of tin sulfide thin films prepared by RF magnetron sputtering techniques

DRAGOMAN, Mircea; ALDRIGO, Martino; DINESCU, Adrian; IORDANESCU, Sergiu; ROMANITAN, Cosmin; VULPE, Silviu; DRAGOMAN, Daniela; BRANISTE, Tudor; SUMAN, Victor; RUSU, Emil; TIGINYANU, Ion (IOP Publishing, 2022)

In this paper we present the microwave properties of tin sulfide (SnS) thin films with the thickness of just 10 nm, grown by RF magnetron sputtering techniques on a 4 inch silicon dioxide/high-resistivity silicon wafer. ...
Models of research, development and innovation systems from the perspective of complexity theory: a case study of the Republic of Moldova

CUJBA, Rodica; FILIP, Florin Gheorghe (Success Culture Press, 2022)

Complexity Theory allows to better understand how some phenomena that surround us and are difficult to describe through traditional approaches of a single scientific domain appear, evolve and adapt. These phenomena have ...
Dynamic optimisation of elevators using biometric identification systems

COZAC, Eugeniu; GURA, Dmitry; BITYUTSKIY, Alexey; KISELEV, Sergei; REPEVA, Anastasia (Inderscience Publishers, 2022)

The research focused on developing a real-time monitoring algorithm for elevators in residential towers. The study employed methods, models, and software tools to build intelligent real-time decision-making systems. A model ...
Radicals and idempotents II

COJUHARI, E. P.; GARDNER, B. J. (Taylor and Francis, 2022)

Continuing the study of interactions between radical theory and corners, subrings of the form eAe, where e is an idempotent of a ring A, we examine radicals characterized by the presence or absence of idempotents of various ...
AUltrathin tin sulfide field-effect transistors with subthreshold slope below 60 mV/decadeero-TiO2 prepared on the basis of networks of ZnO tetrapods

CIOBANU, Vladimir; URSAKI, Veaceslav V.; LEHMANN, Sebastian; BRANISTE, Tudor; RAEVSCHI, Simion; ZALAMAI, Victor V.; MONAICO, Eduard V.; COLPO, Pascal; NIELSCH, Kornelius; TIGINYANU, Ion M. (Multidisciplinary Digital Publishing Institute (MDPI), 2022)

In this paper, new aeromaterials are proposed on the basis of titania thin films deposited using atomic layer deposition (ALD) on a sacrificial network of ZnO microtetrapods. The technology consists of two technological ...
The hydrogen role in the transition towards 100% energy from renewable sources

BRAGA, Dumitru (General Association of the Engineers in Romania (AGIR), 2022)

The last few decades are marked by an upward trend of interest in the use of hydrogen for energy purposes. This interest is due to the belief that hydrogen can contribute to the energy transition towards 100% renewable ...
Decarbonation of the national economy of the Republic of Moldova by electrification and use of renewable energy sources

BRAGA, Dumitru (Politechnica University of Bucharest, 2022)

In this paper, we propose to present the concept and roadmap for decarbonation of the national economy of the Republic of Moldova until 2070. In this order, it is presented technologies for electricity generation and use, ...
Evaluation of the optimal solar fraction for a district heating system

ARION, Valentin; HLUSOV, Viorica; SANDULEAC, Mihai; LEU, Vasile; BOROSAN, Constantin (General Association of the Engineers in Romania (AGIR), 2022)

In this paper the problem of getting formulas for calculating the optimal share of cogeneration within a heat supply system for a consumption zone / node is considered. Optimization criterion-the minimum of the total ...
An analytical approach to cogeneration units economic sizing, that takes into account the evolution of variable parameters over lifetime

ARION, Valentin; HLUSOV, Viorica; NEGURA, Calin; BOROSAN, Constantin (General Association of the Engineers in Romania (AGIR), 2022)

In this paper the problem of getting formulas for calculating the optimal share of cogeneration within a heat supply system for a consumption zone / node is considered. Optimization criterion-the minimum of the total ...
Fortificarea sănătăţii şi bioproductivităţii găinilor-ouătoare în rezultatul utilizării produsului autohton ZooBioR

PISTOL, Gheorghe (Universitatea Tehnică a Moldovei, 2025)

Scopul cercetării: Elucidarea caracterului acţiunii produsului autohton ZooBioR asupra creşterii şi exploatării, sănătății, potenţialului bioproductiv, statusului fiziologo-metabolic (sânge, ser sanguin, muşchi, ficat, ...
Praseodymium(III) removal from aqueous solutions using living and Non-Living arthrospira platensis biomass

YUSHIN, Nikita; ZINICOVSCAIA, Inga; CEPOI, Liliana; CHIRIAC, Tatiana; RUDI, Ludmila; GROZDOV, Dmitrii (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Praseodymium, the sixth-most abundant rare-earth element, is widely used in the aircraft industry for the elaboration of refractory substances, coloring materials, lighting equipment, and fiber optical cables. Living and ...
Cyanobacteria arthospira platensis as an effective tool for gadolinium removal from wastewater

YUSHIN, Nikita; ZINICOVSCAIA, Inga; CEPOI, Liliana; CHIRIAC, Tatiana; RUDI, Ludmila; GROZDOV, Dmitrii (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

The biosorption and bioaccumulation of gadolinium by Arthospira platensis in batch experiments was examined. In biosorption experiments, the influence of pH, gadolinium concentration, time of contact and temperature on ...
Comparative analysis of phenotypic and molecular data on response to main pear diseases and pest attack in a germplasm collection

MARCAS, Leontina I. Simionca; OLTEAN, Ion; POPA, Sergiu; PLAZAS, Mariola; VILANOVA, Santiago; GRAMAZIO, Pietro; SESTRAS, Adriana F.; PROHENS, Jaime; SESTRAS, Radu E. (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

The pear is an important fruit tree in temperate areas, but due to its sensitivity, fruit yield and quality are often affected by disease and pest attacks. Pear genotypes from a germplasm collection comprising 13 Pyrus ...
Tuning the selectivity of metal oxide gas sensors with vapor phase deposited ultrathin polymer thin films

SCHRÖDER, Stefan; ABABII, Nicolai; BRÎNZA, Mihai; MAGARIU, Nicolae; ZIMOCH, Lukas; BODDULURI, Mani Teja; STRUNSKUS, Thomas; ADELUNG, Rainer; FAUPEL, Franz; LUPAN, Oleg (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Metal oxide gas sensors are of great interest for applications ranging from lambda sensors to early hazard detection in explosive media and leakage detection due to their superior properties with regard to sensitivity and ...
Aspects of design in low voltage resilient grids—focus on battery sizing and u level control with P regulation in microgrids of energy communities

SANDULEAC, Mihai; SANDULESCU, Alexandru; EFREMOV, Cristina; IONESCU, Constantin; DAMIAN, Ioan Catalin; MANDIS, Alexandru (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Energy communities and their resiliency are both relatively new subjects of interest that need deeper analysis. The concepts are emerging in the current trend of energy decarbonization, combined with unpredictable external ...
Features of copper and gold nanoparticle translocation in petroselinum crispum segments

PESHKOVA, Alexandra; ZINICOVSCAIA, Inga; CEPOI, Liliana; RUDI, Ludmila; CHIRIAC, Tatiana; YUSHIN, Nikita; SOHATSKY, Alexander (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

The application of metal nanoparticles in industry and medicine results in their release into the environment, which can have a negative impact on human health. The effects of gold (AuNPs) and copper (CuNPs) nanoparticles ...
Protection of environmental and natural values of urban areas against investment pressure: a case study of Romania and Poland

LEGUTKO-KOBUS, Paulina; NOWAK, Maciej; PETRISOR, Alexandru-Ionut; BARBULESCU, Dan; CRACIUN, Cerasella; GÂRJOABA, Atena-Ioana (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Although conservation and development are two facets of sustainability, they are often placed in contradictory positions. In this context, planning systems are able to respond to investment pressure, especially in countries ...
Comparative studies of thermal conductivity determination in synthetic wood with recyclable waste content using an experimental design approach

JUDELE, Loredana; PROASPĂT, Eduard; TEODORESCU, Razvan Ionut; LEPADATU, Daniel; BUCUR, Daniel (Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Waste has become an everyday subject, especially its efficient recycling due to the increasing decline in the planet’s primary resources. Therefore, their recovery is intended to be total and with minimal energy consumption. ...
Assessing the negative effects of suburbanization: the urban sprawl restrictiveness index in Romania’s metropolitan areas

COCHECI, Radu-Matei; PETRISOR, Alexandru-Ionut (Publisher: Multidisciplinary Digital Publishing Institute (MDPI), 2023)

Urban sprawl is widely considered to be a major issue for the functioning of urban areas, threatening long-term sustainability and affecting the quality of living. The aim of this research is to develop a methodology for ...

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