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C. Filote
Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, 720229 Suceava, Romania

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Journal article
Published: 05 August 2021 in Mathematics
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The paper presents an analytical solution for the centric viscoelastic impact of two smooth balls. The contact period has two phases, compression and restitution, delimited by the moment corresponding to maximum deformation. The motion of the system is described by a nonlinear Hunt–Crossley equation that, when compared to the linear model, presents the advantage of a hysteresis loop closing in origin. There is only a single available equation obtained from the theorem of momentum. In order to solve the problem, in the literature, there are accepted different supplementary hypotheses based on energy considerations. In the present paper, the differential equation is written under a convenient form; it is shown that it can be integrated and a first integral is found—this being the main asset of the work. Then, all impact parameters can be calculated. The effect of coefficient of restitution upon all collision characteristics is emphasized, presenting importance for the compliant materials, in the domain of small coefficients of restitution. The results (variations of approach, velocity, force vs. time and hysteresis loop) are compared to two models due to Lankarani and Flores. For quasi-elastic collisions, the results are practically the same for the three models. For smaller values of the coefficient of restitution, the results of the present paper are in good agreement only to the Flores model. The simplified algorithm for the calculus of viscoelastic impact parameters is also presented. This algorithm avoids the large calculus volume required by solving the transcendental equations and definite integrals present in the mathematical model. The method proposed, based on the viscoelastic model given by Hunt and Crossley, can be extended to the elasto–visco–plastic nonlinear impact model.

ACS Style

Stelian Alaci; Constantin Filote; Florina-Carmen Ciornei; Oana Grosu; Maria Raboaca. An Analytical Solution for Non-Linear Viscoelastic Impact. Mathematics 2021, 9, 1849 .

AMA Style

Stelian Alaci, Constantin Filote, Florina-Carmen Ciornei, Oana Grosu, Maria Raboaca. An Analytical Solution for Non-Linear Viscoelastic Impact. Mathematics. 2021; 9 (16):1849.

Chicago/Turabian Style

Stelian Alaci; Constantin Filote; Florina-Carmen Ciornei; Oana Grosu; Maria Raboaca. 2021. "An Analytical Solution for Non-Linear Viscoelastic Impact." Mathematics 9, no. 16: 1849.

Journal article
Published: 02 August 2021 in Applied Sciences
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The study tried to contribute to solving two serious environmental issues: CO2 reducing and sewage sludge disposal. Thus, sewage-sludge-derived materials were obtained in order to be evaluated for CO2 adsorption capacity. Therefore, the char resulted after the sewage sludge pyrolysis was subjected to oxidation and chemical activation processes by using different quantities of alkaline hydroxide. One of the obtained materials, activated with a lower quantity of alkaline hydroxide, was also treated with acid chloride. Further, the materials were structural and texturally characterized, and material treated with acid chloride was used for CO2 adsorption tests, due to high surface area and pore volume. The handmade system coupled to a gas chromatograph allowed the adsorption efficiency evaluation using different feed gases (rich and poor in CO2) by completed purge of pipe line and on-line check. Additionally, the adsorption capacity, separation efficiency, and CO2 recovery were calculated. Taking into account the values for adsorption capacity (separation efficiency and CO2 recovery), it can be concluded that the sewage sludge derived material could be a promising solution for CO2 reduction and waste disposal.

ACS Style

Marius Miricioiu; Anca Zaharioiu; Simona Oancea; Felicia Bucura; Maria Raboaca; Constantin Filote; Roxana Ionete; Violeta Niculescu; Marius Constantinescu. Sewage Sludge Derived Materials for CO2 Adsorption. Applied Sciences 2021, 11, 7139 .

AMA Style

Marius Miricioiu, Anca Zaharioiu, Simona Oancea, Felicia Bucura, Maria Raboaca, Constantin Filote, Roxana Ionete, Violeta Niculescu, Marius Constantinescu. Sewage Sludge Derived Materials for CO2 Adsorption. Applied Sciences. 2021; 11 (15):7139.

Chicago/Turabian Style

Marius Miricioiu; Anca Zaharioiu; Simona Oancea; Felicia Bucura; Maria Raboaca; Constantin Filote; Roxana Ionete; Violeta Niculescu; Marius Constantinescu. 2021. "Sewage Sludge Derived Materials for CO2 Adsorption." Applied Sciences 11, no. 15: 7139.

Journal article
Published: 31 July 2021 in Materials
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In this work, authors have designed, constructed and tested a new kind of partially superconducting axial flux machine. This model is based on the magnetic flux concentration principle. The magnetic field creation part consists of the NbTi superconducting solenoid and two YBaCuO plates. A theoretical study is conducted of an extrapolated superconducting inductor for low-temperature superconducting and high-temperature superconducting solenoids. The optimization of the inductor is carried out in order to increase the torque and the power density as well. This improvement is done by changing the shape of the elements which form the superconducting inductor. Finally, a prototype is realized, and tested.

ACS Style

Brahim Douma; Bilal Abderezzak; Elhadj Ailam; Raluca-Andreea Felseghi; Constantin Filote; Catalin Dumitrescu; Maria Raboaca. Design Development and Analysis of a Partially Superconducting Axial Flux Motor Using YBCO Bulks. Materials 2021, 14, 4295 .

AMA Style

Brahim Douma, Bilal Abderezzak, Elhadj Ailam, Raluca-Andreea Felseghi, Constantin Filote, Catalin Dumitrescu, Maria Raboaca. Design Development and Analysis of a Partially Superconducting Axial Flux Motor Using YBCO Bulks. Materials. 2021; 14 (15):4295.

Chicago/Turabian Style

Brahim Douma; Bilal Abderezzak; Elhadj Ailam; Raluca-Andreea Felseghi; Constantin Filote; Catalin Dumitrescu; Maria Raboaca. 2021. "Design Development and Analysis of a Partially Superconducting Axial Flux Motor Using YBCO Bulks." Materials 14, no. 15: 4295.

Chapter
Published: 01 January 2021 in Research Anthology on Environmental and Societal Well-Being Considerations in Buildings and Architecture
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Currently, buildings are considered to be a continuously evolving organism that over time has to be treated, rehabilitated, and upgraded to meet the requirements set by the user at a certain stage. Buildings are a central element of the EU member states' energy efficiency policies, accounting for about 40% of final energy consumption, and 36% of greenhouse gas emissions, and about 75% of buildings are not energy efficient. Recent applications and studies establish that green retrofitting has maintained older existing buildings to increase energy efficiency, optimize building performance, increase occupants' satisfaction, and boost economic return while decreasing greenhouse gas emissions. In this regard, this chapter aims to address the main factors that negatively affect the performance of residential buildings and presents the common green retrofitting measures that can be taken to ensure the state of human well-being in residential buildings.

ACS Style

Raluca Andreea Felseghi; Teodora Melania Şoimoşan; Constatin Filote; Maria Simona Răboaca. Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives. Research Anthology on Environmental and Societal Well-Being Considerations in Buildings and Architecture 2021, 274 -307.

AMA Style

Raluca Andreea Felseghi, Teodora Melania Şoimoşan, Constatin Filote, Maria Simona Răboaca. Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives. Research Anthology on Environmental and Societal Well-Being Considerations in Buildings and Architecture. 2021; ():274-307.

Chicago/Turabian Style

Raluca Andreea Felseghi; Teodora Melania Şoimoşan; Constatin Filote; Maria Simona Răboaca. 2021. "Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives." Research Anthology on Environmental and Societal Well-Being Considerations in Buildings and Architecture , no. : 274-307.

Journal article
Published: 25 December 2020 in Applied Sciences
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The development and maintenance of complex software systems, with ever-changing requirements has benefited from the implementation of design patterns, which ensure a higher degree of maintainability. The present article illustrates the essential role of design patterns in sketching the software architecture for an electric vehicle charging management platform. We have integrated a series of design patterns to create a solid base structure for the API (Application Programming Interface). Furthermore, we have explored cloud design patterns in the deployment process to ensure a proper multi-tenant cloud application with the best possible tenant isolation for the cost. The aim of this paper is to offer readers an introduction in the case study theme, to describe a complex platform development through design patterns. With proper examples from real projects debated in the industry. The paper demonstrates the design patterns applicability from software level to cloud resources plan and advocates for a high-quality solution in every segment of project development. In conclusion, the results are promising, and the functionality of the established methods on this type of platforms will be evaluated during the implementation period. Overall, design patterns have proven to be essential in the development process, ensuring effective team communication and the delivery of qualitative software solutions.

ACS Style

Maria Meheden; Andrei Musat; Andrei Traciu; Andrei Viziteu; Adrian Onu; Constantin Filote; Maria Simona Răboacă. Design Patterns and Electric Vehicle Charging Software. Applied Sciences 2020, 11, 140 .

AMA Style

Maria Meheden, Andrei Musat, Andrei Traciu, Andrei Viziteu, Adrian Onu, Constantin Filote, Maria Simona Răboacă. Design Patterns and Electric Vehicle Charging Software. Applied Sciences. 2020; 11 (1):140.

Chicago/Turabian Style

Maria Meheden; Andrei Musat; Andrei Traciu; Andrei Viziteu; Adrian Onu; Constantin Filote; Maria Simona Răboacă. 2020. "Design Patterns and Electric Vehicle Charging Software." Applied Sciences 11, no. 1: 140.

Journal article
Published: 17 August 2020 in Applied Sciences
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Although there are many methods in the literature to eliminate noise from images, finding new methods remains a challenge in the field and, despite the complexity of existing methods, many of the methods do not reach a sufficient level of applicability, most often due to the relatively high calculation time. In addition, most existing methods perform well when the processed image is adapted to the algorithm, but otherwise fail or results in significant artifacts. The context of eliminating noise from images is similar to that of improving images and for this reason some notions necessary to understand the proposed method will be repeated. An adaptive spatial filter in the wavelet domain is proposed by soft truncation of the wavelet coefficients with threshold value adapted to the local statistics of the image and correction based on the hierarchical correlation map. The filter exploits, in a new way, both the inter-band and the bandwidth dependence of the wavelet coefficients, considering the minimization of computational resources.

ACS Style

Maria Simona Răboacă; Cătălin Dumitrescu; Constantin Filote; Ioana Manta. A New Adaptive Spatial Filtering Method in the Wavelet Domain for Medical Images. Applied Sciences 2020, 10, 5693 .

AMA Style

Maria Simona Răboacă, Cătălin Dumitrescu, Constantin Filote, Ioana Manta. A New Adaptive Spatial Filtering Method in the Wavelet Domain for Medical Images. Applied Sciences. 2020; 10 (16):5693.

Chicago/Turabian Style

Maria Simona Răboacă; Cătălin Dumitrescu; Constantin Filote; Ioana Manta. 2020. "A New Adaptive Spatial Filtering Method in the Wavelet Domain for Medical Images." Applied Sciences 10, no. 16: 5693.

Research article
Published: 13 July 2020 in International Journal of Energy Research
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The Electric Vehicle (EV) as a clean alternative to Classic Vehicle that use fossil fuels is promoted as an immediate solution to improve the quality parameters of the environment related to the transport sector. The transition to clean electrified mobility must be considered from the sustainability spectrum, and the planning of a strategy related to the implementation of electric vehicles implies, from the beginning, providing clean energy conditions to go toward a green‐to‐green paradigm. It should be noted that the successful implementation of the “green electro mobility” concept depends heavily on the green energy supply solutions of green electric vehicle, so Electric Vehicle Charging Stations (EV‐CS) should be powered by electricity generation systems based on green resources. This research article has as main objective the environmental impact assessment from the perspective of CO2 emissions embedded in green stand‐alone energy systems and the estimation of the environmental benefits of their implementation in the power supply of EV‐CS from the perspective of avoided CO2 emissions compared to the classic electricity supply grid. The results indicate that the green energy systems represent feasible solutions for the independent energy support of electric vehicle charging stations, being able to supply electricity based on on‐site available 100% alternative energy sources. Related to 1 kWh of electricity, the CO2 emissions embedded in these systems represent on average 11.40% of the CO2 emissions of the electricity supplied through the grid at European level and on average 7.10% of the CO2 emissions of the electricity supplied through the grid worldwide. Results also show that the average price of 1kWh of electricity generated by the analyzed systems is 4.3 times higher than the average unit price of the European Union grid energy, but this indicator must be correlated with the kgCO2/kWh cost savings compared to the electricity production from classic power plants.

ACS Style

Constantin Filote; Raluca‐Andreea Felseghi; Maria Simona Raboaca; Ioan Aşchilean. Environmental impact assessment of green energy systems for power supply of electric vehicle charging station. International Journal of Energy Research 2020, 44, 10471 -10494.

AMA Style

Constantin Filote, Raluca‐Andreea Felseghi, Maria Simona Raboaca, Ioan Aşchilean. Environmental impact assessment of green energy systems for power supply of electric vehicle charging station. International Journal of Energy Research. 2020; 44 (13):10471-10494.

Chicago/Turabian Style

Constantin Filote; Raluca‐Andreea Felseghi; Maria Simona Raboaca; Ioan Aşchilean. 2020. "Environmental impact assessment of green energy systems for power supply of electric vehicle charging station." International Journal of Energy Research 44, no. 13: 10471-10494.

Journal article
Published: 31 December 2019 in Energies
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As fuel consumption in the transport sector has increased at a faster pace than in other sectors, the use of electromobility represents the main strategy adopted by the automotive industry. In this context, as the number of electrical vehicles (EVs) will increase, it will also be necessary to increase the number of charging stations. The present paper presents a complete solution for charging stations that can be located in the office or mall parking area. This solution includes a mode 3 AC charging stations of International Electrotechnical Commission (IEC) 61851-1 Standard, an EV simulator for testing the good functionality of the charging stations (i.e., communications, residual-current device (RCD) protection) and a software application used for controlling the charging process by the programmable logic controller (PLC).

ACS Style

Mihai Rata; Gabriela Rata; Constantin Filote; Maria Simona Raboaca; Adrian Graur; Ciprian Afanasov; Andreea-Raluca Felseghi; Rata. The ElectricalVehicle Simulator for Charging Station in Mode 3 of IEC 61851-1 Standard. Energies 2019, 13, 176 .

AMA Style

Mihai Rata, Gabriela Rata, Constantin Filote, Maria Simona Raboaca, Adrian Graur, Ciprian Afanasov, Andreea-Raluca Felseghi, Rata. The ElectricalVehicle Simulator for Charging Station in Mode 3 of IEC 61851-1 Standard. Energies. 2019; 13 (1):176.

Chicago/Turabian Style

Mihai Rata; Gabriela Rata; Constantin Filote; Maria Simona Raboaca; Adrian Graur; Ciprian Afanasov; Andreea-Raluca Felseghi; Rata. 2019. "The ElectricalVehicle Simulator for Charging Station in Mode 3 of IEC 61851-1 Standard." Energies 13, no. 1: 176.

Review
Published: 03 December 2019 in Energies
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The climate changes that are becoming visible today are a challenge for the global research community. The stationary applications sector is one of the most important energy consumers. Harnessing the potential of renewable energy worldwide is currently being considered to find alternatives for obtaining energy by using technologies that offer maximum efficiency and minimum pollution. In this context, new energy generation technologies are needed to both generate low carbon emissions, as well as identifying, planning and implementing the directions for harnessing the potential of renewable energy sources. Hydrogen fuel cell technology represents one of the alternative solutions for future clean energy systems. This article reviews the specific characteristics of hydrogen energy, which recommends it as a clean energy to power stationary applications. The aim of review was to provide an overview of the sustainability elements and the potential of using hydrogen as an alternative energy source for stationary applications, and for identifying the possibilities of increasing the share of hydrogen energy in stationary applications, respectively. As a study method was applied a SWOT analysis, following which a series of strategies that could be adopted in order to increase the degree of use of hydrogen energy as an alternative to the classical energy for stationary applications were recommended. The SWOT analysis conducted in the present study highlights that the implementation of the hydrogen economy depends decisively on the following main factors: legislative framework, energy decision makers, information and interest from the end beneficiaries, potential investors, and existence of specialists in this field.

ACS Style

Raluca-Andreea Felseghi; Elena Carcadea; Maria Simona Raboaca; Cătălin Nicolae Trufin; Constantin Filote. Hydrogen Fuel Cell Technology for the Sustainable Future of Stationary Applications. Energies 2019, 12, 4593 .

AMA Style

Raluca-Andreea Felseghi, Elena Carcadea, Maria Simona Raboaca, Cătălin Nicolae Trufin, Constantin Filote. Hydrogen Fuel Cell Technology for the Sustainable Future of Stationary Applications. Energies. 2019; 12 (23):4593.

Chicago/Turabian Style

Raluca-Andreea Felseghi; Elena Carcadea; Maria Simona Raboaca; Cătălin Nicolae Trufin; Constantin Filote. 2019. "Hydrogen Fuel Cell Technology for the Sustainable Future of Stationary Applications." Energies 12, no. 23: 4593.

Journal article
Published: 29 November 2019 in Water
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There are numerous streamwater parameters that exhibit a diurnal cycle. However, the shape of this cycle has a huge variation from one parameter to another and from one monitoring point to another on the same river. Important variations also occur at the same point during some events, such as high waters. Water level, specific conductivity, dissolved oxygen, oxidation reduction potential, and pH of the Suceava River were monitored for 365 days (2018–2019, hourly sampling frequency) in order to assess the upstream-downstream changes in the diurnal cycle of these parameters, some of these changes being caused by the impact of Suceava city, which is located between the selected monitoring points. The multiresolution analysis of the maximal overlap discrete wavelet transform and the wavelet coherence analysis were combined in a flexible methodology that helped in comparing the upstream and downstream shapes of the diurnal cycle. The methodology allowed for a fast comparison of diurnal profiles during periods of high waters or baseflow. Notable changes were observed in the moments of diurnal maxima and minima.

ACS Style

Andrei-Emil Briciu; Adrian Graur; Dinu Iulian Oprea; Constantin Filote. A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points. Water 2019, 11, 2524 .

AMA Style

Andrei-Emil Briciu, Adrian Graur, Dinu Iulian Oprea, Constantin Filote. A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points. Water. 2019; 11 (12):2524.

Chicago/Turabian Style

Andrei-Emil Briciu; Adrian Graur; Dinu Iulian Oprea; Constantin Filote. 2019. "A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points." Water 11, no. 12: 2524.

Review
Published: 18 March 2019 in Energies
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Nowadays, the evolution of solar energy use has turned into a profound issue because of the implications of many points of view, such as technical, social, economic and environmental that impose major constraints for policy-makers in optimizing solar energy alternatives. The topographical constraints regarding the availability of inexhaustible solar energy is driving field development and highlights the need for increasingly more complex solar power systems. The solar energy is an inexhaustible source of CO2 emission-free energy at a global level. Solar thermal technologies may produce electric power when they are associated with thermal energy storage, and this may be used as a disposable source of limitless energy. Furthermore, it can also be used in industrial processes. Using these high-tech systems in a large area of practice emboldens progress at the performance level. This work compiles the latest literature in order to provide a timely review of the evolution and worldwide implementation of Concentrated Solar Power—CSP—mechanization. The objective of this analysis is to provide thematic documentation as a basis for approaching the concept of a polygeneration solar system and the implementation possibilities. It also aims to highlight the role of the CSP in the current and future world energy system.

ACS Style

Maria Simona Răboacă; Gheorghe Badea; Adrian Enache; Constantin Filote; Gabriel Răsoi; Mihai Rata; Alexandru Lavric; Raluca-Andreea Felseghi. Concentrating Solar Power Technologies. Energies 2019, 12, 1048 .

AMA Style

Maria Simona Răboacă, Gheorghe Badea, Adrian Enache, Constantin Filote, Gabriel Răsoi, Mihai Rata, Alexandru Lavric, Raluca-Andreea Felseghi. Concentrating Solar Power Technologies. Energies. 2019; 12 (6):1048.

Chicago/Turabian Style

Maria Simona Răboacă; Gheorghe Badea; Adrian Enache; Constantin Filote; Gabriel Răsoi; Mihai Rata; Alexandru Lavric; Raluca-Andreea Felseghi. 2019. "Concentrating Solar Power Technologies." Energies 12, no. 6: 1048.

Chapter
Published: 01 January 2019 in Advances in Environmental Engineering and Green Technologies
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Within the current context of energy, there are several ways to meet the challenges of durable development. Efficiency in energy use, considered to be the fifth energy source, as well as the use of sustainable energy sources represent critical objectives. Nowadays, almost 50% of the total energy consumption in Europe is consumed by building heating and cooling. The current heat demand is mainly covered by conventional energy—fossil fuels. Consequently, there is a significant growth potential for the use of renewable energy sources (RES) in order to produce heat. One can expect in the near future that the energy systems would include a larger percentage of renewable sources, so the increase of the RES share is one of the main objectives of the thermoenergetic field. This chapter approaches heating system typology, the performance indicators used to asses the hybrid heating systems, and at the same time synthetising the assumptions of ensuring the optimum operating conditions.

ACS Style

Teodora Melania Şoimoşan; Raluca Andreea Felseghi; Maria Simona Răboacă; Constantin Filote. Heating Systems. Advances in Environmental Engineering and Green Technologies 2019, 283 -307.

AMA Style

Teodora Melania Şoimoşan, Raluca Andreea Felseghi, Maria Simona Răboacă, Constantin Filote. Heating Systems. Advances in Environmental Engineering and Green Technologies. 2019; ():283-307.

Chicago/Turabian Style

Teodora Melania Şoimoşan; Raluca Andreea Felseghi; Maria Simona Răboacă; Constantin Filote. 2019. "Heating Systems." Advances in Environmental Engineering and Green Technologies , no. : 283-307.

Chapter
Published: 01 January 2019 in Advances in Environmental Engineering and Green Technologies
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Currently, buildings are considered to be a continuously evolving organism that over time has to be treated, rehabilitated, and upgraded to meet the requirements set by the user at a certain stage. Buildings are a central element of the EU member states' energy efficiency policies, accounting for about 40% of final energy consumption, and 36% of greenhouse gas emissions, and about 75% of buildings are not energy efficient. Recent applications and studies establish that green retrofitting has maintained older existing buildings to increase energy efficiency, optimize building performance, increase occupants' satisfaction, and boost economic return while decreasing greenhouse gas emissions. In this regard, this chapter aims to address the main factors that negatively affect the performance of residential buildings and presents the common green retrofitting measures that can be taken to ensure the state of human well-being in residential buildings.

ACS Style

Raluca Andreea Felseghi; Teodora Melania Şoimoşan; Constatin Filote; Maria Simona Răboaca. Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives. Advances in Environmental Engineering and Green Technologies 2019, 143 -175.

AMA Style

Raluca Andreea Felseghi, Teodora Melania Şoimoşan, Constatin Filote, Maria Simona Răboaca. Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives. Advances in Environmental Engineering and Green Technologies. 2019; ():143-175.

Chicago/Turabian Style

Raluca Andreea Felseghi; Teodora Melania Şoimoşan; Constatin Filote; Maria Simona Răboaca. 2019. "Considerations Regarding the Green Retrofitting of Residential Buildings From Human Wellbeing Perspectives." Advances in Environmental Engineering and Green Technologies , no. : 143-175.

Journal article
Published: 27 December 2018 in Energies
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Since mid 2010, petrol consumption in the transport sector has increased at a higher rate than in other sectors. The transport sector generates 35% of the total CO2 emissions. In this context, strategies have been adopted to use clean energy, with electromobility being the main directive. This paper examines the possibility of charging electric vehicle batteries with clean energy using solar autochthonous renewable resources. An isolated system was designed, dimensioned, and simulated in operation for a charging station for electric vehicles with photovoltaic panels and batteries as their main components. The optimal configuration of the photovoltaic system was complete with improved Hybrid Optimization by Genetic Algorithms (iHOGA) software version 2.4 and we simulated its operation. The solar energy system has to be designed to ensure that the charging station always has enough electricity to supply several electric vehicles throughout all 24 h of the day. The main results were related to the energy, environmental, and economic performance achieved by the system during one year of operation.

ACS Style

Gheorghe Badea; Raluca-Andreea Felseghi; Mihai Varlam; Constantin Filote; Mihai Culcer; Mariana Iliescu; Maria Simona Răboacă. Design and Simulation of Romanian Solar Energy Charging Station for Electric Vehicles. Energies 2018, 12, 74 .

AMA Style

Gheorghe Badea, Raluca-Andreea Felseghi, Mihai Varlam, Constantin Filote, Mihai Culcer, Mariana Iliescu, Maria Simona Răboacă. Design and Simulation of Romanian Solar Energy Charging Station for Electric Vehicles. Energies. 2018; 12 (1):74.

Chicago/Turabian Style

Gheorghe Badea; Raluca-Andreea Felseghi; Mihai Varlam; Constantin Filote; Mihai Culcer; Mariana Iliescu; Maria Simona Răboacă. 2018. "Design and Simulation of Romanian Solar Energy Charging Station for Electric Vehicles." Energies 12, no. 1: 74.

Journal article
Published: 18 May 2018 in Energies
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Recent environmental and climate change issues make it imperative to persistently approach research into the development of technologies designed to ensure the sustainability of global mobility. At the European Union level, the transport sector is responsible for approximately 28% of greenhouse gas emissions, and 84% of them are associated with road transport. One of the most effective ways to enhance the de-carbonization process of the transport sector is through the promotion of electric propulsion, which involves overcoming barriers related to reduced driving autonomy and the long time required to recharge the batteries. This paper develops and implements a method meant to increase the autonomy and reduce the battery charging time of an electric car to comparable levels of an internal combustion engine vehicle. By doing so, the cost of such vehicles is the only remaining significant barrier in the way of a mass spread of electric propulsion. The chosen method is to hybridize the electric powertrain by using an additional source of fuel; hydrogen gas stored in pressurized cylinders is converted, in situ, into electrical energy by means of a proton exchange membrane fuel cell. The power generated on board can then be used, under the command of a dedicated management system, for battery charging, leading to an increase in the vehicle’s autonomy. Modeling and simulation results served to easily adjust the size of the fuel cell hybrid electric powertrain. After optimization, an actual fuel cell was built and implemented on a vehicle that used the body of a Jeep Wrangler, from which the thermal engine, associated subassemblies, and gearbox were removed. Once completed, the vehicle was tested in traffic conditions and its functional performance was established.

ACS Style

Ioan Aschilean; Mihai Varlam; Mihai Culcer; Mariana Iliescu; Mircea Raceanu; Adrian Enache; Maria Simona Raboaca; Gabriel Rasoi; Constantin Filote. Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle. Energies 2018, 11, 1294 .

AMA Style

Ioan Aschilean, Mihai Varlam, Mihai Culcer, Mariana Iliescu, Mircea Raceanu, Adrian Enache, Maria Simona Raboaca, Gabriel Rasoi, Constantin Filote. Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle. Energies. 2018; 11 (5):1294.

Chicago/Turabian Style

Ioan Aschilean; Mihai Varlam; Mihai Culcer; Mariana Iliescu; Mircea Raceanu; Adrian Enache; Maria Simona Raboaca; Gabriel Rasoi; Constantin Filote. 2018. "Hybrid Electric Powertrain with Fuel Cells for a Series Vehicle." Energies 11, no. 5: 1294.

Journal article
Published: 09 May 2018 in Energies
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Bio-organic greenhouses that are based on alternative resources for producing heat and electricity stand out as an efficient option for the sustainable development of agriculture, thus ensuring good growth and development of plants in all seasons, especially during the cold season. Greenhouses can be used with maximum efficiency in various agricultural lands, providing ideal conditions of temperature and humidity for short-term plant growing, thereby increasing the local production of fruit and vegetables. This paper presents the development of a durable greenhouse concept that is based on complex energy system integrating fuel cells and solar panels. Approaching this innovative concept encountered a major problem in terms of local implementation of this type of greenhouses because of the difficulty in providing electrical and thermal energy from conventional sources to ensure an optimal climate for plant growing. The project result consists in the design and implementation of a sustainable greenhouse energy system that is based on fuel cells and solar panels.

ACS Style

Ioan Aschilean; Gabriel Rasoi; Maria Simona Raboaca; Constantin Filote; Mihai Culcer. Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture. Energies 2018, 11, 1201 .

AMA Style

Ioan Aschilean, Gabriel Rasoi, Maria Simona Raboaca, Constantin Filote, Mihai Culcer. Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture. Energies. 2018; 11 (5):1201.

Chicago/Turabian Style

Ioan Aschilean; Gabriel Rasoi; Maria Simona Raboaca; Constantin Filote; Mihai Culcer. 2018. "Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture." Energies 11, no. 5: 1201.

Conference paper
Published: 03 July 2017 in MATEC Web of Conferences
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The paper proposes a method and the related experimental setup for finding the drag coefficient for a body. The device consists in a pendulum materialized by a hinged rod initially in horizontal position. A spherical body immersed in a liquid is attached to the free end of the rod. The restoring force is created by a helical spring. The inertial characteristics of the pendulum can be changed using an additional mass. The differential equation characteristic to the motion of the pendulum is deduced and subsequently integrated numerically. The coincidence between experimental and theoretical data allow for viscosity evaluation.

ACS Style

Stelian Alaci; Constantin Filote; Daniel Fodorcan; Erwin-Vasile Alexandru; Dumitru Amarandei; Florina-Carmen Ciornei. Damped periodic motions used in the study of the drag coefficient. MATEC Web of Conferences 2017, 112, 7003 .

AMA Style

Stelian Alaci, Constantin Filote, Daniel Fodorcan, Erwin-Vasile Alexandru, Dumitru Amarandei, Florina-Carmen Ciornei. Damped periodic motions used in the study of the drag coefficient. MATEC Web of Conferences. 2017; 112 ():7003.

Chicago/Turabian Style

Stelian Alaci; Constantin Filote; Daniel Fodorcan; Erwin-Vasile Alexandru; Dumitru Amarandei; Florina-Carmen Ciornei. 2017. "Damped periodic motions used in the study of the drag coefficient." MATEC Web of Conferences 112, no. : 7003.

Conference paper
Published: 03 July 2017 in MATEC Web of Conferences
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The complexity of the study concerning an impact phenomenon depends strongly on the accepted simplifying hypothesis for the model. One of the most important assumptions in the study of mechanical impact refers to the absolutely rigid or compliant character of colliding bodies. It is anticipated that the employment of hypothesis of deformable body should lead to a better modelling of the process. The present paper presents a qualitative comparison between the results obtained via the two methods, considering one of the simplest impact models, namely the collision with dry friction between a metallic ball and an immobile flat body.

ACS Style

Florina-Carmen Ciornei; Stelian Alaci; Dumitru Amarandei; Constantin Filote; Ioan Tămăşag. Rigidity versus deformability hypothesis in impact dynamics. MATEC Web of Conferences 2017, 112, 7005 .

AMA Style

Florina-Carmen Ciornei, Stelian Alaci, Dumitru Amarandei, Constantin Filote, Ioan Tămăşag. Rigidity versus deformability hypothesis in impact dynamics. MATEC Web of Conferences. 2017; 112 ():7005.

Chicago/Turabian Style

Florina-Carmen Ciornei; Stelian Alaci; Dumitru Amarandei; Constantin Filote; Ioan Tămăşag. 2017. "Rigidity versus deformability hypothesis in impact dynamics." MATEC Web of Conferences 112, no. : 7005.

Conference paper
Published: 01 May 2016 in 2016 International Conference on Development and Application Systems (DAS)
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The current development and broad adoption of cloud technologies brought in new alternative technologies that are being used to make the launch of applications in the cloud faster and easier. Interactive social media applications are faced with the challenge of efficiently provisioning new resources in order to meet the demands of the growing number of application users. This paper describes how Docker can run as a hypervisor, and how we managed to enable for the fast provisioning of computing resources inside of an OpenStack IaaS using the nova-docker plugin that we developed.

ACS Style

Alin Calinciuc; Cristian Constantin Spoiala; Corneliu Octavian Turcu; Constantin Filote. OpenStack and Docker: Building a high-performance IaaS platform for interactive social media applications. 2016 International Conference on Development and Application Systems (DAS) 2016, 287 -290.

AMA Style

Alin Calinciuc, Cristian Constantin Spoiala, Corneliu Octavian Turcu, Constantin Filote. OpenStack and Docker: Building a high-performance IaaS platform for interactive social media applications. 2016 International Conference on Development and Application Systems (DAS). 2016; ():287-290.

Chicago/Turabian Style

Alin Calinciuc; Cristian Constantin Spoiala; Corneliu Octavian Turcu; Constantin Filote. 2016. "OpenStack and Docker: Building a high-performance IaaS platform for interactive social media applications." 2016 International Conference on Development and Application Systems (DAS) , no. : 287-290.

Conference paper
Published: 01 May 2016 in 2016 International Conference on Development and Application Systems (DAS)
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Current developments in real-time technologies enable multiple companies to focus on a standard in order to bring real-time technologies to the web. The efforts lead to the API standard WebRTC that supports voice and video chat and P2P file sharing, without the need to install external plugins on browsers. As lots of services will switch to WebRTC we found useful to provide a comparison of a WebRTC server on Docker containers and virtual machines. As WebRTC server, we used Kurento Media Server, a powerful open source server with many advanced features. This paper is testing what kind of virtualization is more suitable for a multimedia application based on WebRTC. We tested Docker containers and KVM machines with a multimedia based test. As lots of services will switch to WebRTC we found useful to provide a comparison between two kinds of virtualization for a multimedia application based on WebRTC. Thus, we considered a WebRTC server on Docker containers and virtual machines. As WebRTC server, we used Kurento Media Server, a powerful open source server with many advanced features. We tested the Docker containers and KVM machines with a multimedia based test.

ACS Style

Cristian Constantin Spoiala; Alin Calinciuc; Corneliu Octavian Turcu; Constantin Filote. Performance comparison of a WebRTC server on Docker versus virtual machine. 2016 International Conference on Development and Application Systems (DAS) 2016, 295 -298.

AMA Style

Cristian Constantin Spoiala, Alin Calinciuc, Corneliu Octavian Turcu, Constantin Filote. Performance comparison of a WebRTC server on Docker versus virtual machine. 2016 International Conference on Development and Application Systems (DAS). 2016; ():295-298.

Chicago/Turabian Style

Cristian Constantin Spoiala; Alin Calinciuc; Corneliu Octavian Turcu; Constantin Filote. 2016. "Performance comparison of a WebRTC server on Docker versus virtual machine." 2016 International Conference on Development and Application Systems (DAS) , no. : 295-298.