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Search Results: 1 - 10 of 2727 matches for " Dorin Marcel CIATAR?? "
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Vasile Iuliu CIOMO?,Dorin Marcel CIATAR??,Ilie VLAICU
Transylvanian Review of Administrative Sciences , 2011,
Abstract: The Project Life Cycle refers to a logical sequence of activities to accomplish the project’s goals or objectives. Regardless of scope or complexity, any project goes through a series of stages during its life. Authors’ experience in preparing and implementing investment projects in the water sector has led to several conclusions: there is first an identification phase, in which the outputs and critical success factors are defined, followed by a planning phase, characterized by breaking down the project into smaller tasks, an execution phase, in which the project plan is executed, and lastly a completion phase, that marks the closure and exit of the project. Investment project activities must be grouped into phases because by doing so, the project management and the core team can efficiently plan and organize resources for each activity, and also objectively measure achievement of the goals.This paper introduces several issues related to the Project Cycle Management for a large local infrastructure investment project in the Cluj- S laj area, Romania. Successfully managing the project cycle and making timely decisions at every stage (identification, planning, execution and sustainability) require the Project Management Unit from the Cluj-S laj Water Company to constantly understand and adapt to strategic considerations, both external and internal.
Vasile Iuliu CIOMO?,Dorin Marcel CIATAR??,Alina-Oana CIOMO?
Transylvanian Review of Administrative Sciences , 2012,
Abstract: In Romania, local authorities and the newly established Regional Operators, one of them being S.C. Compania de Ap Some S.A., are required to fully comply with EU regulations concerning water and wastewater quality. In order to meet these requirements in due time, a lot of investment projects have to be prepared and implemented. The nancing of these investments requires a progressive increase of the tariffs. In the last ten years, in Romania, the tariffs for the water services have been signi cantly augmented, more than in any other East European country. In the same time, a substantial reduction of the residential water consumption, measured in liters per capita per day, has been observed.In this article, the price elasticity of residential water demand for water services was analyzed, given its importance in the framework of the feasibility studies for investments to be made in order to insure compliance with EU water and wastewater Directives. In the same time, considerations with regard to the evolution of the tariff for water services and of the residential water demand are provided, with the aim of better explaining the context in which these variables evolve.
Evolution of the Birth Rates and Infant Mortality Rates between 1990-2007 in Cluj District
Anca FARKAS,Dorin CIATAR??,Br?ndu?a BOCO?,?tefan I. ?IGAN
Applied Medical Informatics , 2010,
Abstract: The quality of drinking-water in Cluj-Napoca is controlled through a combination of measures: protection of water sources, control of treatment processes and management of the distribution and handling of the water. The first component, protection of water sources may be done only knowing as much of water quality and of the factors that threaten it. The present paper reveals the water source of Cluj, Gil u Lake and his affluent Some ul Rece River monitoring in a period of 5 years, between 2005 and 2009, their physical, chemical and microbiological parameters being monitored once a month, watching on the evolution of water quality. This surveillance offers a review of the safety and acceptability of drinking water supplies in Cluj County and contributes with several applicative aspects towards water quality supervision and evolution in time of the big dam reservoirs and their tributaries, which may be a major source of pollution downstream. Descriptive analyses, including the mean value, variability, trends, correlations and graphic displays were performed; SPSS and Epi-Info 2000 statistical software were used. Data analysis revealed that the good quality of Gil u Lake regarding physical and chemical parameters led to its framing in A1 quality category, except for ammonium and microbiological parameters, which allowed the framing in A2 quality category. Major averages in Some ul Rece than in Gil u Lake, up to 14 fold for faecal coliforms indicates the fact that the river worked out an important and constant pollution cause for Gil u water source during the period of time considered.
Simion TATARU,Dorin LOZICI,Daniela BARAN,Marcel STERE
INCAS Bulletin , 2009, DOI: doi: 10.13111/2066-8201.2009.1.2.18
Abstract: In the aerospace industry one of the most important requirements in the aircraft design andoperation is the high level of fiability under various atmosphere and environmental conditions. Thedesign and validation of such a system is a great challenge. It must meet several requirements suchas: high resistence, low weight and a small occupied volume. The stresses that occur during theaircraft operation are extremely complex, being the result of the interaction of differentsystems.Consequently, in order to obtain an optimal design of the whole system, the design, testingand operating processes require a combination of laborious analysis and experimental data. As upto 90% of the structure failures are du to the fatigue, high performance methods of fatigue analysisare needed to estimate the aircraft ressources. These methods must enable a precise determinationof the static and dynamic strains inder to correctly estimate the aircraft ressource. The projectproposes an approach of some aspects of the aircraft/ aircraft subassemblies simulation and testingand develop o calculation methodology of experimental data and high performance numericmethods integration in order to establish the ressource.
Daniela Baran,Marcel STERE,Simion TATARU,Dorin LOZICI
INCAS Bulletin , 2009, DOI: 10.13111/2066-8201.2009.1.1.17
Abstract: The main objective of this project is to develop a set of tools and to integrate techniques in a software package which is build on structure analysis applications based on Romanian engineers experience in designing and analysing aerospace structures, consolidated with the most recent methods and techniques. The applications automates the structure’s design and analysis processes and facilitate the exchange of technical information between the partners involved in a complex aerospace project without limiting the domain.
Teaching Virtual Experts for Multi-Domain Collaborative Planning
Gheorghe Tecuci,Mihai Boicu,Dorin Marcu,Marcel Barbulescu
Journal of Software , 2008, DOI: 10.4304/jsw.3.3.38-59
Abstract: This paper presents an approach to rapid development of virtual planning experts that can collaborate to develop plans of action requiring expertise from multiple domains. The approach is implemented into a new type of software tool, called Disciple-VPT, which includes an extensible library of virtual planning experts from different domains. Teams of such virtual experts can be rapidly assembled from the library to generate complex plans of actions that require their joint expertise. The basic component of the Disciple-VPT tool is the Disciple-VE learning agent shell that can be taught directly by a subject matter expert how to plan, trough planning examples and explanations, in a way that is similar to how the expert would teach an apprentice. Copies of the Disciple-VE shells are used by experts in different domains to rapidly populate the library of virtual experts of Disciple-VPT.
The Geometry of the Mappings by General Dirichlet Series  [PDF]
Dorin Ghisa
Advances in Pure Mathematics (APM) , 2017, DOI: 10.4236/apm.2017.71001
Abstract: We dealt in a series of previous publications with some geometric aspects of the mappings by functions obtained as analytic continuations to the whole complex plane of general Dirichlet series. Pictures illustrating those aspects contain a lot of other information which has been waiting for a rigorous proof. Such a task is partially fulfilled in this paper, where we succeeded among other things, to prove a theorem about general Dirichlet series having as corollary the Speiser’s theorem. We have also proved that those functions do not possess multiple zeros of order higher than 2 and the double zeros have very particular locations. Moreover, their derivatives have only simple zeros. With these results at hand, we revisited GRH for a simplified proof.
The Localization of Commutative Bounded BCK-Algebras  [PDF]
Dana Piciu, Dan Dorin Tascau
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.16066
Abstract: In this paper we develop a theory of localization for bounded commutative BCK-algebras. We try to extend some results from the case of commutative Hilbert algebras (see [1]) to the case of commutative BCK-alge- bras.
Distribution-Based Identification of Yield Coefficients in a Baker’s Yeast Bioprocess
Dorin Sendrescu
Mathematical Problems in Engineering , 2012, DOI: 10.1155/2012/789156
Abstract: A distribution-based identification procedure for estimation of yield coefficients in a baker’s yeast bioprocess is proposed. This procedure transforms a system of differential equations to a system of algebraic equations with respect to unknown parameters. The relation between the state variables is represented by functionals using techniques from distribution theory. A hierarchical structure of identification is used, which allows obtaining a linear algebraic system of equations in the unknown parameters. The coefficients of this algebraic system are functionals depending on the input and state variables evaluated through some test functions from distribution theory. First, only some state equations are evaluated throughout test functions to obtain a set of linear equations in parameters. The results of this first stage of identification are used to express other parameters by linear equations. The process is repeated until all parameters are identified. The performances of the method are analyzed by numerical simulations.
Single-stage PFC ac-dc converters
Dorin Cismasiu
Journal of Electrical and Electronics Engineering , 2009,
Abstract: For single-phase applications, two stagepower factor correction (PFC) rectifiers are typicalapproach used to achieve high power factor and fastoutput regulation. In low power area this method is tocostly. It is possible to construct a converter containinga single transistor which accomplish above mentionedfunctions. This paper highlights topological and designrequirements of single-stage high quality rectifiers.Experimental waveforms confirm the imposed mode ofoperation.
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