38 research outputs found

    Internal Combustion Engines

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    This book on internal combustion engines brings out few chapters on the research activities through the wide range of current engine issues. The first section groups combustion-related papers including all research areas from fuel delivery to exhaust emission phenomena. The second one deals with various problems on engine design, modeling, manufacturing, control and testing. Such structure should improve legibility of the book and helps to integrate all singular chapters as a logical whole

    Acta Polytechnica Hungarica 2021

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    Mathematical Modeling and Simulation in Mechanics and Dynamic Systems

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    The present book contains the 16 papers accepted and published in the Special Issue “Mathematical Modeling and Simulation in Mechanics and Dynamic Systems” of the MDPI “Mathematics” journal, which cover a wide range of topics connected to the theory and applications of Modeling and Simulation of Dynamic Systems in different field. These topics include, among others, methods to model and simulate mechanical system in real engineering. It is hopped that the book will find interest and be useful for those working in the area of Modeling and Simulation of the Dynamic Systems, as well as for those with the proper mathematical background and willing to become familiar with recent advances in Dynamic Systems, which has nowadays entered almost all sectors of human life and activity

    Researches regarding the evolution, magnitude and complexity of the impact generated by the economic activities on the East Jiu River

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    Ongoing development of modern society, based on consumption of goods and services, leads to the increase of compulsoriness of economic agents to face market requirements by increasing the degree of local and regional industrialization. Establishment of new economic activities generates negative pressures on the environment and surface waters, generating increased pollution, manifested by vulnerability of aquatic ecosystems to stressors. Preliminary studies carried out within the doctoral thesis entitled 'Research on the evolution, magnitude and complexity of the impact of economic activities on the East Jiu' include information on characteristic elements of the East Jiu River basin, in accordance with the Water Framework Directive 2000/60/CE. The objectives of the field research aimed to identify economic activities in the eastern Jiu Valley generating an impact on the environment (especially the mining industry, but also timber exploitation and processing, local agriculture, animal husbandry and waste storage), establishing a quarterly monitoring program of the river basin, identification of flora and fauna species and identification of areas vulnerable to potential pollution. Based on observations made in situ and on information obtained from the evolution process of the monitoring program, the appropriate methodologies for assessing physical-chemical and ecological quality of the water were selected. Study of the evolution of the impact generated by economic activities on the East Jiu was carried out by mathematical modelling, with finite volumes, of the East Jiu River basin and plotting of pollutant dispersion maps. The magnitude and complexity of impact generated by economic activities was studied by using a complex system based on fuzzy logic, designed based on interactions between natural and artificial systems, between physical-chemical indicators of water and ecosystem. The research carried out substantiates in development of necessary technical measures to reduce the impact generated by economic activities located in eastern Jiu Valley, without significantly changing the hydrodynamics of the river basin. Following research, during different research stages, methods, techniques and tools were designed and accomplished with the help of which, water and aquatic ecosystems’ quality can be assessed, as well as the impact generated by human activity on the Jiu River, at a given moment and/or continuously.:CONTENT ACKNOWLEDGEMENTS SUMMARY LIST OF FIGURES LIST OF TABLES ABBREVIATIONS INTRODUCTION PURPOSE OF THE THESIS AND RESEARCH METHODOLOGY CHAPTER 1 THE EAST JIUL RIVER HYDROGRAPHIC BASIN 1.1. Soil and subsoil of the Eastern part of Jiu Valley 1.2. Climate description of the Eastern part of Jiu Valley 1.3. Geology particularities of the Eastern part of Jiu Valley 1.4. Groundwater features of the Eastern part of Jiu Valley 1.5. Flora and fauna of the Eastern part of Jiu Valley CHAPTER 2 SOURCES OF IMPACT ON THE QUALITY OF WATER, RIPARIAN, TERRESTRIAL AND AQUATIC ECOSYSTEMS 2.1. Mining industry 2.2. Wood processing industry in the Eastern part of Jiu Valley 2.3. Urban agriculture and local animal husbandry 2.4. Inappropriate urban household waste storage CHAPTER 3 MONITORING PROGRAM AND METHODS OF EVALUATION OF THE QUALITY OF THE EAST JIUL RIVER 3.1. Establishment of monitoring (control) sections 3.2. Monitoring program of the East Jiu River basin 3.3. Sampling, transport and analysis of water samples 3.4. Methodology used to establish the water quality CHAPTER 4 QUALITY ASSESSMENT OF WATER IN THE EASTERN JIU HYDROGRAPHIC BASIN 4.1. Section 1 - Jieț River - upstream of household settlements (blank assay) 4.2. Section 2 - East Jiu River - in the area of Tirici village 4.3. Section 3 - Răscoala brook - before the confluence with East Jiu River 4.4. Section 4 - East Jiu River - after the confluence with the Răscoala brook 4.5. Section 5 - Taia River - upstream of the confluence with East Jiu River 4.6. Section 6 - East Jiu River - before the confluence with the Taia River 4.7. Section 7 - East Jiu River - after the confluence with the Taia River 4.8. Section 8 - Jiet River downstream of household settlements 4.9. Section 9 - East Jiu River - after the confluence with the Jieț River 4.10. Section 10 - East Jiu River - before the confluence with Banița River 4.11. Section 11 - Roşia River - upstream of household settlements 4.12. Section 12 - Bănița River - after the confluence with the Roșia River 4.13. Section 13 - East Jiu River - after the confluence with the Banița River 4.14. Section 14 - Maleia River - before the confluence with East Jiu River 4.15. Section 15 - Slătioara River - before the confluence with East Jiu River 4.16. Section 16 – East Jiu River - before the confluence with West Jiu River CHAPTER 5 INFLUENCES OF PHYSICAL-CHEMICAL FACTORS ON AQUATIC ICHTHYOFAUNA IN THE EAST JIU RIVER BASIN 5.1. Total suspended solids and aquatic ecosystems 5.2. Acidity or basicity reaction of surface watercourses 5.3. Aquatic ecosystem requirements for gas oversaturation 5.4. Nitrogenous compounds in watercourse 5.5. Phenols, aquatic ecosystems and water quality CHAPTER 6 ANALYSIS OF THE IMPACT GENERATED BY ECONOMIC ACTIVITIES IN THE EASTERN PART OF JIU VALLEY 6.1. Impact analysis of mining industry in the Eastern Part of Jiu Valley 6.2. The general impact of Eastern Jiu Valley dumps to water quality 6.3. Research on effective infiltration in the Eastern part of Jiu Valley 6.4. Research on groundwater quality in the Eastern part of Jiu Valley 6.5. Analysis of the impact generated by local micro-agriculture 6.6. Analysis of the impact generated by deforestation and wood processing 6.7. Analysis of the impact generated by non-compliant landfilling of waste CHAPTER 7 EVOLUTION OF THE IMPACT GENERATED BY ECONOMIC ACTIVITIES IN THE EASTERN JIU VALLEY 7.1. Analysis of the dynamic elements of the watercourse - RMA2 mode 7.2. Analysis of pollutants concentration evolution in the water course - RMA4 module 7.3. Computational field and composition of the energy model of the East Jiu River 7.4. Extension and evolution of the impact generated by economic activities on the East Jiu River 7.5. Extension and evolution of the impact caused by organic pollution of the East Jiu River CHAPTER 8 MAGNITUDE AND COMPLEXITY OF THE IMPACT GENERATED BY ECONOMIC ACTIVITIES IN THE EASTERN JIU VALLEY 8.1. Definition of input linguistic variables 8.2. Linguistic outputs of the fuzzy interference system 8.3. Defining the Black Box set of rules 8.4. Proficiency testing of complex systems based on fuzzy logic 8.5. While it is all about the wheel do not forget about the cube CONCLUSIONS AND PERSONAL CONTRIBUTIONS REFERENCE

    Agrár- és vidékfejlesztési szemle : 6. évf. (2011) 1. sz. suppl.

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    "Agrarian Economy and Rural Development - Realities and Perspectives for Romania"

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    The volume contains the papers accepted and published in the proceedings of the 9th International symposium entitled: “Agrarian Economy and Rural Development - Realities and Perspectives for Romania’, organized by the Research Institute for Agriculture Economy and Rural Development – Bucharest, in cooperation with the Institute of Agricultural Economics - Romanian Academy, University of Agrarian Sciences and Veterinary Medicine – The Faculty of Management, Economic Engineering in Agriculture and Rural Development – Bucharest - Romania, Institute for Economy, Finance and Statistics – Chisinau - Republic of Moldova, Institute of Agricultural Economics - Belgrade – Serbia, under the high scientific patronage of the Academy of Agricultural and Forestry Sciences ”Gheorghe Ionescu Sisesti”, held in Bucharest - Romania, on November 15th, 2018. The proceedings are structured in accordance with the sessions of the symposium: Concepts, evaluations and visions on the dynamics of rural socio-economy; Economy, management and agricultural marketing; Rural development and agricultural policies. In the symposium proceedings, there are shared knowledge, experience and the newest results of the research on agrarian economy and rural development domains, related to: the agri-food trade, the impact of new tax policies in semi-subsistence agriculture, statistical analysis of the socio-demographic and economic characteristics of rural areas, bioeconomy concept - challenges and perspectives for agriculture, land resources – structural evolutions, modernization and socio-economic development of the rural area, rural education, improvement and optimisation of soil conservation system “no tillage”, the analysis of the technico-economic indicators for the main crops, milk sector in international context, vegetable farm structure evolution by standard output, rentability of consumed resources in condition of conventional and ecological operation, analysis of the impact of coupled support in agriculture etc. The symposium proceedings is structured in 5 specialized sections, where the read my find interesting argues regarding this research field

    Agrarian Economy and Rural Development - realities and perspectives for Romania

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    The volume contains the papers accepted and published in the proceedings of the 3rd International symposium entitled: ‘Agrarian Economy and Rural Development - realities and perspectives for Romania’, organized by the Institute of Research for Agricultural Economics and Rural Development, Bucharest in cooperation with, Institute of Agricultural Economics, Belgrade – Serbia, Institute for Economy, Finance and Statistics, Chisinau, Republic of Moldova, Academy of Economic Studies - The Faculty Of Agro-Food And Environment Economy, Bucharest, Romania, University of Agrarian Sciences and Veterinary Medicine – The Faculty Of Management, Economic Engineering in Agriculture and Rural Development, Bucharest, Romania, Petroleum and Gas University of Ploiesti - Faculty of Economic Sciences, Romania, University “Dunarea De Jos”- Faculty of Economy and Business Administration Galati, Romania, under the high scientific patronage of Academy of Agriculture and Forest Sciences "Gheorghe Ionescu Sisesti" and The Balkan Scientific Association of Agrarian Economists, held in Bucharest, Romania, October, 11- 13, 2012 The proceedings are structured in accordance with the sessions of the conference and it includes papers and relevant contributions on plenary speakers, Economy, management and agricultural marketing and Rural development and agricultural policies. Publishing this volume represents a term of the interest expressed by the highest academic and research groups in Romania and EU with interests in the agricultural sector. In the symposium proceedings are shared knowledge, experience and the newest results of your research in the agrarian economy and rural development domain related to the food quality and security, innovation and struggle against climate changes, biodiversity conservation, enhanced competitiveness and efficiency in agriculture and rural development, etc
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