Search Results - "Răzvan OPREA"

Dendrogeomorphological Reconstruction of Rockfall Activity in a Forest Stand, in the Cozia Massif (Southern Carpathians, Romania) by Adriana-Bianca Ovreiu, Constantin-Răzvan Oprea, Andreea Andra-Topârceanu, Radu-Daniel Pintilii

“…Determining the spatio-temporal patterns of rockfalls, such as the zonation of hazards and the assessment of associated risks, can be challenging due to poor…”
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Waves in electric contact wires subjected to transversal impulses by Oprea, Răzvan Andrei, Popa, Gabriel, Gheţi, Marius Alin

“…It is a well-known fact that the raising of the pantograph is followed by an electric arch. The reasons for this phenomenon are the oscillations of the…”
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An analysis of the train–turnout interaction by Tudorache, Mihaela Cristina, Oprea, Răzvan Andrei

“…A distinctive feature of the application proposed in this work is the occurrence of simultaneous contact patches on a single wheel, i.e., the multi-point…”
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Geostatistical analyses of communication routes in a geo-strategic and regional development perspective by Petrişor, Alexandru-Ionuţ, Oprea, Răzvan Andrei, Vlad, Liviu Bogdan

“…Accessibility is a key concept in regional development, with numerous ties to territorial cohesion and polycentricity. Moreover, it also exhibits a…”
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The 2nd International Conference - Geographical Sciences and the Future of Earth, November 12, 2021, Bucharest, Romania by OPREA, RĂZVAN

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The 2nd International Conference - Geographical Sciences and the Future of Earth by Răzvan OPREA

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Alternative friction models for braking train dynamics by Oprea, Razvan Andrei, Cruceanu, Catalin, Spiroiu, Marius Adrian

“…Braking dynamics plays an essential role in ensuring the comfort and running safety of trains. Due to the complexity of the phenomena involved and the presence…”
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Reflections on the school network of the settlements lying in the Sub-Carpathian watershed of the Cricovul Sãrat by MONICA OPREA, RĂZVAN OPREA

“…For knowledge of issues relating to the school network in the communities located in the sub-Carpathian watershed of Cricovul Sarat we analyzed a series of…”
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AN OVERVIEW OF ELECTROMOBILITY IN ROMANIA by POPA, VASILE, COCOȘ, OCTAVIAN, OPREA, RĂZVAN

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Longitudinal dynamics of trains—a non-smooth approach by Oprea, Razvan Andrei

“…An efficient and straightforward algorithm for the integration of the constrained systems is developed in the present work. Some of the fundamental issues of…”
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A constrained motion perspective of railway vehicles collision by Oprea, Razvan Andrei

“…Impacts, friction, and normal contact forces occur in the railway vehicles couplers. This paper presents a novel nonsmooth model of the train collision; until…”
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The Landforms of the Făgărăș Mountains (The Argeș Mountain Catchment): Analysis of the Related Dynamic Processes by Nedelea, Alexandru, Oprea, Răzvan, Comănescu, Laura, Curcan, Gheorghe

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THE SOCIO-ECONOMIC DEVELOPMENT OF ALGERIA AFTER 1990 IN THE CONTEXT OF SOCIAL UNREST, TERRORIST ATTACKS AND ENVIRONMENTAL RESTRICTIVENESS by Vasile POPA, Răzvan C. OPREA, Octavian COCOȘ

“…After the conquest of independence, Algeria experienced major socio-economic changes, but it also faced a civil war that has been responsible for more than…”
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The spatio-temporal analysis of the rockfall activity of the past two centuries through dendrogeomorphic reconstruction in Cozia Massif (Southern Carpathians, Romania) by Ovreiu, Adriana Bianca, Pop, Olimpiu Traian, Oprea, Constantin Razvan, Andra-Toparceanu, Andreea, Cruceru, Nicolae

“…Rockfalls are geomorphic processes characteristic of steep mountain environments, which pose a threat to buildings, transport routes, tourism activities and…”
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ELEMENTS OF PEDODIVERSITY WITHIN ETALON PERIMETERS FROM THE BUGEGI AND THE BAIU MOUNTAINS/ELEMENTE ALE PEDODIVERSITATII ÎN PERIMETRE ETALON DIN MUNTII BUCEGI SI BAIU by Oprea, Razvan

“…The concept of pedodiversity is similar to that of biodiversity. The research of biodiversity, considered as the variety and variability of the living…”
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Pedological Characteristics of the Central Eastern Area of Ploiesti Plain (Western Part of Ploiesti City) by RAZVAN OPREA, ALEXANDRU NEDELEA, MONICA OPREA

“…The aim of this study is to characterize the soils in an area situated at the western edge of Ploie ş ti city (the central-eastern part of the Ploie ş ti…”
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THE ALTITUDINAL ZONATION OF THE MORPHODYNAMIC PROCESSES ALONG THE CAPRA AND THE BUDA VALLEYS (THE FAGARAS MOUNTAINS)/ETAJAREA ALTITUDINALA A PROCESELOR MORFODINAMICE PE VAILE CAPRA SI BUDA (MUNTII FAGARAS) by Nedelea, Alexandru, Oprea, Razvan

“…The present aspect of the relief within the Fagaras Mountains represents just a moment in the evolution of this chain that underwent significant changes. The…”
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THE LANDSCAPE DIFFERENTIATIONS IN THE PRAHOVA SECTOR OF THE BUCEGI MOUNTAINS by Oprea, Razvan, Nedelea, Alexandru, Curcan, Gheorghe

“…The physiognomic complexity as the main characteristics of the Bucegi Mountains landscape is the result of lithology, structure, tectonics and high altitude,…”
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The Landforms of the Fagaras Mountains (The Arges Mountain Catchment): Analysis of the Related Dynamic Processes/Formele din Muntii Fagaras (bazinul montan al Argesului): analiza proceselor dinamice asociate by Nedelea, Alexandru, Oprea, Razvan, Comanescu, Laura, Curcan, Gheorghe

“…The present configuration of the Fagaras Mountains is a snapshot of the long-term evolution that brought about significant alterations of the landscape, and…”
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NOTIONS REGARDING THE RELATION BETWEEN LANDFORMS AND SOIL IN THE EASTERN AND NORTH-EASTERN REGION OF THE ROMANIAN PLAIN by Oprea, Razvan, Nedelea, Alexandru, Curcan, Gheorghe

“…This present study aims at rendering the way the geomorphologic features of the eastern and northeastern regions of the Romanian Plain, influenced by the…”
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