907 research outputs found
Chemical Processes Exergy Assessment in the Circular Economy
No full textTreballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2020-2021, Tutors: Alexandra Plesu Popescu, Yen Keong CheahThe linear economy of taking, use and dispose of is not sustainable, and the UE is promoting the circular economy to reduce the number of resources taken from the environment and give them maximal use before being disposed of. Unfortunately, there are not many circular processes examples applied to the textile industry in the literature. The present study aims to propose a circular economy process and perform the mass balances and exergy balances. The exergy balances are a valuable tool to assess the resources consumed and lost from the assessed process. Several case studies are presented and have proven to be a viable option for the implementation of the circular economy process. However, further studies are required to minimise their environmental impac
Eco-gamma Assessment on Water Resources Impact
No full textTreballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2020-2021, Tutors: Alexandra Elena Plesu Popescu, Yen Keong CheahNowadays, the environmental impact of the water usage is estimated based on the amount of water consumed, but it does not consider the quality of the water. Although, there are different methods to quantify the water footprint, the amount of water consumed, there is not a method which can determinate the water quality impact evaluation. The aim of this project is the validation of a novel index that measures the environmental impact of water degradation. This index explains, not only the quantity of water but the impact of human or natural pollution
No other articles or projects evaluate the ecological impact by using the eco-gamma equation, and especially focusing on water degradation.
Real examples have been searched, to give the evaluation a realistic condition, and evaluate different scenarios in different conditions. Also trying to implement the use of this equation for other uses, how can it be the simulation of the impact of an industrial activity in a certain environment.
From energy and mass balances, and this easy eco-gamma equation which evaluates how different parameters affect the growing rate of different species, it is possible to evaluate the impact different activities make to an environment
BOOK REVIEW ON THE CITY AND THE URBAN COMPETITION, AUTHOR: IRINA POPESCU
No full textThe book “The city and the urban competition / Orasul si competitia urbana”, written by Irina Popescu, has recently been published at Economic Publishing House of Bucharest, Romania. The book is structured in 4 parts and it is very rich in concepts, ideas, theories, principles and comparative studies, representing an important contribution of the author to the development of the literature concerning the study of the city.urban competition, urban system
Beaty Popescu : This Green Bag
No full textHorne discusses Popescu's works from 1987 to 1992 involving natural objects embedded within layers of paper; the author treats themes such as the interior/exterior dichotomy and analogies with food and digestive organs. Artist's statement. Biographical notes. 28 bibl. ref
To halt disease progression rehabilitation in MS should start early: Commentary
No full textThe author(s) received no financial support for the research, authorship and/or publication of this article
Numerical simulation of the descendent liquid film in a vertical tube
No full textTreballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2019-2020. Tutors: Alexandra Elena Plesu Popescu, Joan Llorens LlacunaNowadays, it is impossible to have doubts that technology advances have been involved on the development of the humanity, including development of chemical engineering. For example, the computer invention and their increasing calculation power gave us the opportunity to solve more easily and quickly Transport Phenomena equations. These equations, which are the basis of Computational Fluid Dynamics (CFD), had been defined by Bird many years ago (1960), but during these days their solution required an computation power out the capabilities of the computers available at that time and it depended on the ability of the human. However, now we can use them easily to simulate fluid flow and to understand it better.
In this project, the Mathematica 12.0 programming skill and the transport phenomena knowledge acquired during the degree is used to solve the mass and momentum conservation equations. With this knowledge, a recent article published by Hogxia Gao in the AlChE journal on 2018 has been reproduced. This article simulates the drop of a liquid film along a vertical tube of known dimensions. To reproduce it different models are implemented, for example a CFD model has been used to simulate the liquid film flow, by this way the film thickness and the hydrodynamics at the entry length have been predicted. The simulations are done using different liquids (distilled water / 40% water-sugar solution / 30% MEA-water solution) and different flowrates. Besides, its results have been compared with different symbolical models (two models based on Navier-Stokes equations and one based on an expression given by Bird to predict liquid film thickness along a vertical wall). and with experimental data from this reference. Hence, a total of four model has been implemented, each one of them has been applied in three mixtures to different flow rates, it means that more than 250 simulation have been done.
The results of this project compared with the available experimental data show that the implemented CFD model programmed in Mathematica 12.0 predicts quite well the film thickness but not the hydrodynamics at the entry. Moreover, they are useful to understand and get an insight about how change the film flow depending on the liquid and on the flowrate used. In consequence, models to predict the hydrodynamics at the entry could be proposed on a future projec
Agricultural management strategies in a changing economy Advances in finance, accounting, and economics (AFAE) book series./ [edited by] Gabriel Popescu and Andrei Jean-Vasile.
No full textIncludes bibliographical references and index."This book brings together emergent research and best practices in the area of agricultural management, policy, and structures, highlighting theoretical concepts and empirical research"--Regional development disparities in romanian agriculture and rural development : a multi-criteria approach / Gabriel Popescu, Bucharest University of Economic Studies, Romania, Simona Bara, Bucharest University of Economic Studies, Romania -- Territorial-based marketing strategies for typical agro-food products : issues and perspectives / Diego Begalli, University of Verona, Italy, Roberta Capitello, University of Verona, Italy, Lara Agnoli, University of Verona, Italy -- The influence of common agricultural policy (cap) on development of the agricultural production structures in romania and eu-28 / Andrei Jean Vasile, Petroleum-Gas University of Ploiesti, Romania, Mieila Mihai, Valahia University of Targoviste, Romania, Smoleanu Alexandra, Petroleum-Gas University of Ploiesti, Romania -- Current state of fish production on carp farms in serbia / Stevan Zanak, State University of Novi Pazar, Republic of Serbia, Jonel Subi?, Institute of Agricultural Economics, Republic of Serbia, Marko Jelo?nik, Institute of Agricultural Economics, Republic of Serbia -- The reform of eu economic governance / Gheorghe Popescu, Dimitrie Cantemir Christian University,Bucharest, Romania -- Soil moisture as one of the limiting factors in the production of medicinal plants / Vladimir Filipovic, Institute for Medicinal Plants Research, Dr Josif Pani¿, Belgrade, Serbia, Natalia Kljajic, Institute of Agricultural Economics, Belgrade, Serbia -- Romanian rural tourism in the context of sustainable development / Marian Zaharia, Petroleum-Gas University of Ploiesti, Romania, Rodica-Manuela Gogonea, Academy of Economic Studies, Romania, Daniela Enachescu, Petroleum-Gas University of Ploiesti, Romania -- Territorial and agricultural resources from the rural vrancea area with decisive role in the development of the local economy / Tataru Alexandra, The National Institute of Economic Research ¿Costin C. Kiritescu, Bucharest, Romania -- Nedelcu adrian, petroleum-gas university of ploiesti, romania -- Changing consumption patterns in green economy / Sima Violeta, Petroleum-Gas University of Ploiesti, Romania, Gheorghe Ileana Georgiana, Petroleum-Gas University of Ploiesti, Romania -- Entrepreneurship in small-scale farms : from production to commercialization / Luøsa Margarida Cagica Carvalho, Open University, Lisbon & CEFAGE, University of Évora, Portugal -- Solar energy potential as support for sustainable development of romanian economy / Dusmanescu Dorel, Petroleum-Gas University of Ploiesti, Romania -- Population number and consumer income and expenditure dynamics:an analysis of world countries / Adrian Stancu, Petroleum-Gas University of Ploie?ti, Faculty of Economic Sciences, Romania -- Combining organic agriculture and recreation : evidence from italy / Donatella Privitera, University of Catania, Department Scienze della Formazione, Catania, Italy -- Rural romanian education : issues of the reform and foreign language teaching / Diana Presad, Petroleum-Gas University of Ploiesti, Romania, Mihaela Badea, Petroleum-Gas University of Ploiesti, Romania -- Green economy and sustainable development / Nica Elvira, University of Economic Studies,Bucharest, Romania -- Ariculture and global climate changes' importance of sustainable management of natural resources / Svetlana Roljevic, Institute of Agricultural Economics Belgrade, Serbia, Marijana Jovanovic, Institute of Agricultural Economics Belgrade, Serbia -- Improved irrigation management for sustainable agriculture / Vesna Popovi?, Institute of Agricultural Economics, Belgrade, Serbia, Vladan Ugrenovic, Agricultural Extension Service Institute Tamic, Panevo, Serbia -- A comparative analysis of the lag tara oasului and tara oltului as romanian management strategies / Andreea Paul, Bucharest Academy of Economic Studies, Romania.1 online resource (xxi, 439 pages)
Simulació de la circulació de fluids en medi porós (ANSYS®)
No full textTreballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2015-2016, Tutors: Joan Llorens Llacuna i Alexandra Elena Bonet RuizA fluidized bed is defined as a process that consists of a bed of solid particles and a fluid flow to achieve a homogenous mixture between particles and fluid.
Actually, due to the increase of the computer’s power, simulations based on microscopic balances are performed using with CFD (Computational Fluid Dynamics) software.
Therefore, with this tool, the behavior and the functioning of the simulated unit can be visualized and better understood. Consequently, in this project the simulation program ANSYS® is studied, considering the case study of a fluidized bed. It is going to analyze its behavior by the contours of volume fraction and its pressure drop. Eventually, the obtained results contribute to the understanding of how a fluidized bed works
Training the sages of integrity
No full textDrawing on his experience in the field and his familiarity with theatrical techniques, Marian Popescu offers us a stimulating reflection on what he ends up calling academic "integrative ethics" and on the role that "wise men of integrity" should play in its implementation. The author develops his proposal by understanding the historical flaws and advances in the field of character education. The training, combining cognitive devices and communicative and dramatic skills of these experts, mediators and referents appears, in his view, to be the key element in the current fight for integrity
LA REPRESENTATION DU COMMUNISME DANS L’OEUVRE DE PETRU DUMITRIU, OANA ORLEA ET MARIUS DANIEL POPESCU
No full textThis article analyzes the representation of Romanian communism in exile and migrant literature from the ‘60s to the early 2000. The three authors that are discussed here belong to three generations of Romanian writers and their literary works revolve around communism. There are some common themes in their novels, such as: society described as a prison, the destruction of human trust under the strain of communism, the dissolution of identity in the context of exile and migration, the obsessive desire to leave the country. Another similarity between these works is the fact that they use autofiction, in order to emphasize the text’s authenticity; but Dumitriu, Orlea, and Popescu transform their personal experience by using complex narrative techniques in order to express a more general reflection concerning aspects such as: the freedom of expression, the influence of dictatorial regime on society, the conflict between the writer and the political power
- …
