Volume LVIII Number 1/2006 |  |
1. | The Rough Calculus of Treble Defined Integrals Tănase Dinu | pg. 1-6 |
| In the present paper approximate formulare for triple integral that have great precision calculation are obtained. To obtain these formulare we used polynomials in interpolation to five nodes for simple defined integrals. By using the calculation mode of triple integrals, one can reduce the approximate calculation of triple integrals to double integrals by means of the approximate calculation of the simple integrals. | ||
| 2. | Ensembles Demi-préouverts dans les Espaces Topologiques Flous Mihai Brescan | pg. 7-14 |
| Dans ce travail on généralise pour les espaces topologiques flous la notion d’ensemble demi-préouvert introduit dans la topologie classique par D. ANDRIJEVIĆ[1]. Nous définissons ici les opérateurs flous demi-préfermeture et demi-préintérieur et puis on établit des relations importantes avec les opérateurs Fdemi-fermeture et F-demi-intérieur introduits par nous dans le travail [3]. | ||
| 3. | Sequences of Numbers and their Associated Functions Mihai Pascu | pg. 15-22 |
| The relationship between the logarithmic convex sequences of real numbers and their associated functions is investigated. A convex function N is constructed starting from a logarithmic sequence and then a function M~ is associated to N. We shall prove that these two functions are related through a Clairaut equation. | ||
| 4. | On Viscous Dissipation in the Incompressible Fluid Flow between Two Parallel Plates Tudor Boacǎ | pg. 23-30 |
| This paper considers the problem of viscous dissipation in the laminar incompressible fluid flow between two parallel plates with Neumann boundary conditions. The method proposed to determine the temperature of the fluid makes use of the separation of variables. Thus the solution of the problem is obtained by series expansion about the complete eigenfunctions system of a Sturm-Liouville problem. Eigennfunctions and eigenvalues of this Sturm-Liouville problem is obtained by Galerkin’s method. | ||
| 5. | Predicting Students’ Status after the First Session by Using Logistic Regression Cristian Marinoiu | pg. 31-36 |
| In this paper we build a regression logistic model which allows us to predict, with certain probability, students’ status (if he/she has passed or not all the exams) in the informatics field, after the first winter session. This is made on the basis of the marks obtainedo in the entrance exam. | ||
| 6. | Need for Group Transactions in Multimedia and Design Databases Monica Vlădoiu, Cătălina Negoiţă | pg. 37-42 |
| Classical concurrency control assumes that transactions are short. This is far too radical for usually long multimedia/design transactions (e.g the locking concurrency control has problems because a long transaction can block the access of others to its locks during its execution time; in optimistic control conflicts, they are detected only at the end, so rollback is unacceptable). An appropriate model for design/multimedia process, as an ensemble of sub-tasks, seems to be the group transaction. This allows the exchange of partial data and the restoration of not committed data by using as many intermediary database levels as needed between the private and the public database. | ||
| 7. | The Use of RFID Technology in an Integrated System for the Maintenance of Equipments Radu Lixăndroiu | pg. 43-50 |
| The application proposed wants to maximize the process of maintenance, the planning, in order to obtain a productive process..The idea of this application starts from the necessity of accounting and planning the repairs of equipments from the productivity sector. Technically, the system proposed is based on RFID technology, used for obtaining the traceability of equipments. The equipment has an RFID tag, which can be read and written with an RFID reader. | ||
| 8. | Aspects of Collaboration Tools in E-learning Iuliana Dobre | pg. 51-56 |
| Collaboration tools help teachers and students work and learn together at a distance. They let the elearning process participants share their ideas and even their sighs and smiles. They are essential for collaborative e-learning and knowledge management initiatives. The collaboration tools represent a category of a wide range of tools, from simple text-based e-mail clients to complex online meeting tools. Providing a complete collaborative environment may require to combine several separate tools and technologies. The paper presents an overview of the most important aspects of collaboration tools specific to e-learning process. | ||
| 9. | Can SVG Be the New Vector Graphics Standard? Cătălina Negoiţă, Monica Vlădoiu | pg. 57-64 |
| SVG (Scalable Vector Graphics) format is a new vector graphics standard based on XML grammar for defining vector-based 2D graphics on Web. This paper presents the SVG’s advantages over the most common graphic formats used on Web today. It shows the suitability of SVG as a tool for presentation and communication, representation of statistical data, access to information for people with visual impairment, scientific and medical data, etc. Furthermore, it will look at the possibilities for using such a tool: companies are employing SVG developers; SVG is on the phones, is moving into the browsers, and is appearing in embedded display systems on trains and planes. | ||
| 10. | The Calculation of the Integrals Using the Monte Carlo Method Mădălina Cărbureanu | pg. 65-72 |
| The appearance of the Monte Carlo simulation method is placed near the year 1944. This method was interpreted in many ways, it received various definitions, so we can say that this method knew a long and controversial forming and development process. In this article, we shall approach one of the Monte Carlo integration methods, namely the „hit or miss” method. What recommends this method for solving a varied problems range is the fact that, to obtain the best result, usually a much smaller calculation effort is necessary in relation with the problem’s intricacy. | ||
| 11. | Contribution to the Development of the Theory with Absorption of Gravitational Interaction Ion Simaciu | pg. 73-80 |
| In this paper it is investigated a hypothesis concerning the origin of the gravitational interaction. In accordance with this hypothesis, the gravitational interaction is due to the universal background radiation absorption. The Theory with Absorption of Gravitational Interaction (T. A. G. I.) is a development of the Newton idea concerning the origin of the gravitational interaction: the gravitation is generated by the impulse spread of any medium on whatever body. | ||