162 research outputs found


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    E-government represents one of the most palpable results of the dynamic development of the information and communication technology. Defined mostly as an intensive use of information technologies to provide public services, e-government has been approached in the literature rather from a technological perspective, with a significant importance given to the supply and a lower attention paid to the demand side. The increasing interest in taking into consideration the demand side in the development of the e-government initiatives and projects has created the foundation for a shift in the way the conceptual framework for e-government planning and implementation is defined, from the technology infrastructure and costs to the customer-centric character of all the efforts done. The European Union put e-government on its agenda aiming to improve access to the public information and services, increase transparency of public administration, exploit effectively the information technology within public administration, and establishing e-procurement. The development of the e-government services in the Member States, as it is expressed by the data regarding the supply and demand side, has been conducted in a more or less different manner that led, at the Union's level, to a relatively high availability but a rather low usage of the specific services. The paper explores the relationship between the e-government supply and demand based on the secondary data referring to the public services available to the citizens (as these are defined by the Eurostat methodology) and the usage of these services by the individuals, integrating them through an analytical matrix inspired by the BCG model. Probably the most important conclusion of this analysis states that development of the e-government services has not been accompanied by measures meant to stimulate their usage in the most of the European Union Member States. The analytical matrix allowed also the identification of the question mark, star, cash cow and dog Member States in terms of the e-government market development.e-government market, demand, supply, European Union


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    The concept of privacy, seen in connection with the consumer\'s private space, and defined in terms of the rights the consumer have to disclose or not, respectively to have protected their personal data has gained an increasing importance, as a result of the organizations' extended and more and more aggressive attempts, within their marketing efforts, to capture, process and use the consumers' personal data. Privacy protection has become an important but, in the same time, extremely sensitive and challenging topic to be taken into consideration by all the stakeholders involved in the processing and employment of the consumers' personal data. A key role in this respect is played by the public authorities acting as data controllers - the Data Protection Authorities, that have to adopt a more proactive and efficient attitude in adopting and implementing policies and processes aiming to ensure a more effective protection of the personal data and private space, conduct privacy impact assessments and continuously improve the specific activities. Paper presents the opinions of the consumers through the results of an exploratory study regarding the importance given to the protection of the personal data, the area of protection of the specific laws, the need for laws regulating the personal data protection, the balance between the public and private entities in providing a proper protection of the personal data, and the relationship between the domestic, European, and international levels in ensuring the protection of the consumers' personal data. Results regarding the role of the public authorities in the protection of the consumers' personal data and private space- in terms of the most appropriate institution to act as a data controller, the rights consumers consider important in relationship with the protection of their personal data and the risks faced in the context of a less effective protection - are also presented.consumer, public authorities, personal data, consumer private space, Romania

    Branch-and-Prune Search Strategies for Numerical Constraint Solving

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    When solving numerical constraints such as nonlinear equations and inequalities, solvers often exploit pruning techniques, which remove redundant value combinations from the domains of variables, at pruning steps. To find the complete solution set, most of these solvers alternate the pruning steps with branching steps, which split each problem into subproblems. This forms the so-called branch-and-prune framework, well known among the approaches for solving numerical constraints. The basic branch-and-prune search strategy that uses domain bisections in place of the branching steps is called the bisection search. In general, the bisection search works well in case (i) the solutions are isolated, but it can be improved further in case (ii) there are continuums of solutions (this often occurs when inequalities are involved). In this paper, we propose a new branch-and-prune search strategy along with several variants, which not only allow yielding better branching decisions in the latter case, but also work as well as the bisection search does in the former case. These new search algorithms enable us to employ various pruning techniques in the construction of inner and outer approximations of the solution set. Our experiments show that these algorithms speed up the solving process often by one order of magnitude or more when solving problems with continuums of solutions, while keeping the same performance as the bisection search when the solutions are isolated.Comment: 43 pages, 11 figure

    High-Quality Carbon Nanomaterials Synthesized by Excimer Laser Ablation

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    Due to their special physical and chemical properties and potential applications from hydrogen storage to medical implantation, the carbon-based nanomaterials are in the frame of attention for many research groups all over the world. As synthesis techniques, we highlight arc discharge, chemical vapor deposition (CVD) and laser ablation. Even an expensive technique, laser ablation is suitable for single-wall carbon nanotubes (SWCNTs) synthesis, providing the highest yield of over 70%, while arc discharge yield is about 30% and CVD is about 42%. The most common investigation methods for carbon nanomaterials are micro-Raman spectroscopy, thermo-gravimetric analysis (TGA) and morphological and topographic studies done by atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HR-TEM). We also emphasize in this work that by involving a home-designed reactor, we successfully synthesized SWCNTs, carbon nano-onions (CNOs) as well as graphene in the same reactor. Tuning the experimental parameters, we switch the end type of nanomaterials. We have done comprehensive studies regarding the carbon nanomaterials synthesis

    The Passive Greenhouses

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    On solving distributed CS(O)Ps with privacy

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    Cryptographic protocols can enforce privacy in distributed computation of functions [Goldwasser'96] and are a competitor of the distributed constructive search techniques. [Goldreich'87,Chaum'87,Chaum'88,Ben-or'88] show how cryptographic protocols can be compiled from protocols/functions for honest agents. For some combinations of concepts of security and types of attacks, cryptographic protocols obtained this way can be safe. We discuss their application to constraint satisfaction (and optimization) problems. A first version of this report, with some notation problems, appears in the PhD thesis report [Silaghi'02]

    Experimental investigations on built-up cold-formed steel beams connected by resistance spot welding

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    [EN] The WELLFORMED research project, ongoing at the CEMSIG Research Center of the Politehnica University of Timisoara, proposes to study a new technological solution for built-up beams made of corrugated steel sheets for the web and thin-walled cold-formed steel profiles for the flanges, connected by resistance spot welding. Within the research project, the experimental work includes tensile-shear tests on the lap joint spot-welded specimens, were different combinations of steel sheets with various thicknesses were tested and, tests on full scale beams in bending. The study intends to demonstrate the feasibility of the proposed solutions, to assess their performance and to enlarge the knowledge by using numerical simulations for the optimization of the current solution and to define the limits of the solution’s applicability.This work was supported by a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS/CCCDI - UEFISCDI, project number PN-III-P2-2.1-PED2016-1684 / WELLFORMED - Fast welding cold-formed steel beams of corrugated sheet web, within PNCDI III.Ungureanu, V.; Both, I.; Burca, M.; Grosan, M.; Neagu, C.; Dubina, D. (2018). Experimental investigations on built-up cold-formed steel beams connected by resistance spot welding. En Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures. ASCCS 2018. Editorial Universitat Politècnica de València. 205-212. https://doi.org/10.4995/ASCCS2018.2018.716920521