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Drăgoi MV, Hadăr A, Goga N, Baciu F, Ștefan A, Grigore LȘ, Gorgoteanu D, Molder C, Oncioiu I. Contributions to the Dynamic Regime Behavior of a Bionic Leg Prosthesis. Biomimetics (Basel) 2023; 8:414. [PMID: 37754165 PMCID: PMC10526395 DOI: 10.3390/biomimetics8050414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/28/2023] Open
Abstract
The purpose of prosthetic devices is to reproduce the angular-torque profile of a healthy human during locomotion. A lightweight and energy-efficient joint is capable of decreasing the peak actuator power and/or power consumption per gait cycle, while adequately meeting profile-matching constraints. The aim of this study was to highlight the dynamic characteristics of a bionic leg with electric actuators with rotational movement. Three-dimensional (3D)-printing technology was used to create the leg, and servomotors were used for the joints. A stepper motor was used for horizontal movement. For better numerical simulation of the printed model, three mechanical tests were carried out (tension, compression, and bending), based on which the main mechanical characteristics necessary for the numerical simulation were obtained. For the experimental model made, the dynamic stresses could be determined, which highlights the fact that, under the conditions given for the experimental model, the prosthesis resists.
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Affiliation(s)
- Marius-Valentin Drăgoi
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
| | - Anton Hadăr
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
- Academy of Romanian Scientists, 3 Ilfov Street, Sector 5, 050045 Bucharest, Romania
- Technical Sciences Academy of Romania, 26 Dacia Boulevard, Sector 1, 030167 Bucharest, Romania
| | - Nicolae Goga
- Faculty of Engineering in Foreign Languages, Politehnica University of Bucharest, 060042 București, Romania;
| | - Florin Baciu
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
| | - Amado Ștefan
- Department of Integrated Aviation Systems and Mechanics, Faculty of Aircraft and Military Vehicles, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania;
| | - Lucian Ștefăniță Grigore
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Damian Gorgoteanu
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Cristian Molder
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Ionica Oncioiu
- Department of Informatics, Faculty of Informatics, Titu Maiorescu University, 040051 Bucharest, Romania
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Priescu I, Oncioiu I. Measuring the Impact of Virtual Communities on the Intention to Use Telemedicine Services. Healthcare (Basel) 2022; 10:healthcare10091685. [PMID: 36141297 PMCID: PMC9498647 DOI: 10.3390/healthcare10091685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/16/2022] Open
Abstract
Digital marketing has given new life to healthcare services by enhancing their visibility in the online space. People choose online healthcare services because they can receive instant answers and communicate with specialists in their comfortable environment at the right time. The purpose of this study was to understand the impact of virtual communities on the intention to use telemedicine. The model is based on a combination of consumer desire (psychological objective) and loyalty through promotional formats (economic objective), as well as data collected from 442 respondents analyzed using structural equation modeling. The research results show that by analyzing target groups in social networks, content can be individualized, and an accurate measurement of e-patient satisfaction must be conducted in order to improve the experience of future consumers of telemedicine services. The results of this study explain what makes people want to use digital healthcare services and can serve as a guide for people who run virtual communities and help digital healthcare service providers figure out how to market their services.
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Affiliation(s)
- Iustin Priescu
- Department of Informatics, Faculty of Informatics, Titu Maiorescu University, 040051 Bucharest, Romania
| | - Ionica Oncioiu
- Faculty of Finance-Banking, Accountancy and Business Administration, Titu Maiorescu University, 040051 Bucharest, Romania
- Doctoral School of Economic Sciences, University of Craiova, 200585 Craiova, Romania
- Correspondence:
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Grigore LȘ, Gorgoteanu D, Molder C, Alexa O, Oncioiu I, Ștefan A, Constantin D, Lupoae M, Bălașa RI. A Dynamic Motion Analysis of a Six-Wheel Ground Vehicle for Emergency Intervention Actions. Sensors (Basel) 2021; 21:s21051618. [PMID: 33669001 PMCID: PMC7956183 DOI: 10.3390/s21051618] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 02/03/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022]
Abstract
To protect the personnel of the intervention units operating in high-risk areas, it is necessary to introduce (autonomous/semi-autonomous) robotic intervention systems. Previous studies have shown that robotic intervention systems should be as versatile as possible. Here, we focused on the idea of a robotic system composed of two vectors: a carrier vector and an operational vector. The proposed system particularly relates to the carrier vector. A simple analytical model was developed to enable the entire robotic assembly to be autonomous. To validate the analytical-numerical model regarding the kinematics and dynamics of the carrier vector, two of the following applications are presented: intervention for extinguishing a fire and performing measurements for monitoring gamma radiation in a public enclosure. The results show that the chosen carrier vector solution, i.e., the ground vehicle with six-wheel drive, satisfies the requirements related to the mobility of the robotic intervention system. In addition, the conclusions present the elements of the kinematics and dynamics of the robot.
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Affiliation(s)
- Lucian Ștefăniță Grigore
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Damian Gorgoteanu
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Cristian Molder
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Octavian Alexa
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Ionica Oncioiu
- Faculty of Finance-Banking, Accountancy and Business Administration, Titu Maiorescu University, 040051 Bucharest, Romania
- Correspondence: ; Tel.: +40-372-710-962
| | - Amado Ștefan
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Daniel Constantin
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Marin Lupoae
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
| | - Răzvan-Ionuț Bălașa
- Military Technical Academy, “FERDINAND I”, 39–49 George Coșbuc Av., 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.); (O.A.); (A.Ș.); (D.C.); (M.L.); (R.-I.B.)
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Alexa O, Coropețchi I, Vasile A, Oncioiu I, Grigore LȘ. Considerations for Determining the Coefficient of Inertia Masses for a Tracked Vehicle. Sensors (Basel) 2020; 20:E5587. [PMID: 33003489 PMCID: PMC7583047 DOI: 10.3390/s20195587] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 12/02/2022]
Abstract
The purpose of the article is to present a point of view on determining the mass moment of inertia coefficient of a tracked vehicle. This coefficient is very useful to be able to estimate the performance of a tracked vehicle, including slips in the converter. Determining vehicle acceleration plays an important role in assessing vehicle mobility. Additionally, during the transition from the Hydroconverter to the hydro-clutch regime, these estimations become quite difficult due to the complexity of the propulsion aggregate (engine and hydrodynamic transmission) and rolling equipment. The algorithm for determining performance is focused on estimating acceleration performance. To validate the proposed model, tests were performed to determine the equivalent reduced moments of inertia at the drive wheel (gravitational method) and the main components (three-wire pendulum method). The dynamic performances determined during the starting process are necessary for the validation of the general model for simulating the longitudinal dynamics of the vehicle. Finally, the differential and algebraic equations of the virtual model approximate more accurately the actual process of the operation of the vehicle. The virtual model, through the data obtained from the simulation process, allows for the determination, indirectly, of the variation of the mass moment of inertia coefficient and its expression of approximation.
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Affiliation(s)
- Octavian Alexa
- Military Technical Academy “FERDINAND I”, 39-49 George Coșbuc Av., 050141 Bucharest, Romania; (O.A.); (I.C.); (A.V.); (L.Ș.G.)
| | - Iulian Coropețchi
- Military Technical Academy “FERDINAND I”, 39-49 George Coșbuc Av., 050141 Bucharest, Romania; (O.A.); (I.C.); (A.V.); (L.Ș.G.)
| | - Alexandru Vasile
- Military Technical Academy “FERDINAND I”, 39-49 George Coșbuc Av., 050141 Bucharest, Romania; (O.A.); (I.C.); (A.V.); (L.Ș.G.)
| | - Ionica Oncioiu
- Faculty of Finance-Banking, Accountancy and Business Administration, Titu Maiorescu University, 040051 Bucharest, Romania
| | - Lucian Ștefăniță Grigore
- Military Technical Academy “FERDINAND I”, 39-49 George Coșbuc Av., 050141 Bucharest, Romania; (O.A.); (I.C.); (A.V.); (L.Ș.G.)
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Oncioiu I, Dănescu T, Popa MA. Air-Pollution Control in an Emergent Market: Does It Work? Evidence from Romania. Int J Environ Res Public Health 2020; 17:ijerph17082656. [PMID: 32294934 PMCID: PMC7215349 DOI: 10.3390/ijerph17082656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/10/2020] [Accepted: 04/10/2020] [Indexed: 12/11/2022]
Abstract
Economic development in a national and international context must be based on a sustainability strategy established on the systemic interaction between the economic, sociocultural, and ecological environments. Today, the world is confronted by many challenges related to climate change and natural-resource flows, including waste streams resulting from economic activity. The need for national and European environmental standards and the work of an environment monitoring authority to reduce air pollution are highlighted by economic and industrial activities. Thus, our research focused on determining if emissions of sulfur dioxide (SO2), nitrogen (NO2), and particulate matter 10 (PM10) are influenced by planned and unplanned inspections made by competent authorities from Romania. We built a regression model that estimates the influence of economic measures imposed by the authorities on reducing industrial air pollution. Preliminary results showed that the number of inspections negatively influences air pollution, indicating that national and local authorities in Romania are striving to maintain air quality and are conducting more inspections when air pollution is high.
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Affiliation(s)
- Ionica Oncioiu
- Faculty of Finance–Banking, Accountancy and Business Administration, Titu Maiorescu University, 040051 Bucharest, Romania
- Correspondence: ; Tel.: +04-0241-6822-238
| | - Tatiana Dănescu
- Faculty of Economics and Law, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu-Mures, 540139 Targu Mures, Romania; (T.D.); (M.-A.P.)
| | - Maria-Alexandra Popa
- Faculty of Economics and Law, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu-Mures, 540139 Targu Mures, Romania; (T.D.); (M.-A.P.)
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Oncioiu I, Grecu E, Mâşu S, Morariu F, Popa M. The effect of fly ash on sunflower growth and human health. Environ Sci Pollut Res Int 2018; 25:35548-35554. [PMID: 30350152 DOI: 10.1007/s11356-018-3444-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 10/10/2018] [Indexed: 06/08/2023]
Abstract
One of the challenges brought by the circular economy requires a reconsideration of waste, which may under certain circumstances turn into genuine resources. By extension, soil pollution with heavy metal is a major concern since it directly affects the health of the population. The goal of the present research work is to analyze the impact of the use of waste from other technological processes in agriculture: fly ash (resulting ash from thermal power plants), zeolite bush (resulting from the processing of rock from zeolite quarries), and manure (garbage from zoo technical farms). In this respect, complex treatments based on inorganic substances (fly ash and volcanic indigenous tuff with 70% clinoptilolite) were applied to less-favored agricultural soils in the absence and in the presence of an organic fertilizer (manure), respectively. After cultivating sunflower (Helianthus annuus L.), a semi-early hybrid grown in the type of soil on which fly ash has been applied, there have been obtained seed crops 15.8% higher than the seed crops grown in the soil on which no fertilizer has been applied. The results obtained when combining fly ash and manure tend to amount to those obtained when combining manure with indigenous volcanic tuff with 70% clinoptilolite. The quality of the seed crops, obtained in the case of the three types of soil on which amendments were added in the absence/presence of the fertilizer, corresponds to the requirements of the national rules and allows their food processing.
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Affiliation(s)
- Ionica Oncioiu
- Titu Maiorescu University, 189 Calea Văcăreşti Street, 040051, Bucharest, Romania.
| | - Eugenia Grecu
- Politehnica University of Timisoara, 14 Remus Street, Timisoara, Romania
| | - Smaranda Mâşu
- Research and Development Institute for Industrial Ecology-ECOIND, Subsidiary of Timisoara, 115 Bujorilor Street, Timisoara, Romania
| | - Florica Morariu
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 119 Calea Aradului, Timisoara, Romania
| | - Maria Popa
- 1 Decembrie 1918 University of Alba Iulia, 15-17 Unirii Street, Alba Iulia, Romania
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Oncioiu I, Petrescu M, Duică MC, Croitoru G. The Impact of Employee Motivation on Romanian Organizational Performance. Information Resources Management Journal 2018. [DOI: 10.4018/irmj.2018100104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Employee performance evaluation is an essential management practice for any organization, because the progress of employees is of real importance in enhancing the efficiency and development of every organization. The authors propose a model that ties employee motivation to organizational performance. The research objectives were designed to identify strategies that take into account all the factors contributing to quality and superior productivity of labor, in other words, to identify motivation strategies conducive to efficient management. The assessment was conducted through quantitative analysis using a questionnaire. The questionnaire, through the statements contained therein, assessed how public and private organizational performance reflect employee motivation characteristics.
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