Annals of „Constantin Brâncuşi” University of Târgu Jiu ENGINEERING SERIES

7

Authors: O.T. Mewomo, B.A. Popoola

The notion of approximate ultraamenability in Banach algebras is introduced. General theory is developed for this notion. In particular, we show that the projective tensor product between the Banach algebra A and B (A B ⊗ˆ ) is not approximately ultra-amenable whenever A is not approximately ultra-amenable and B admits a nonzero character.

8

Authors: Sevasti Mitsi, Iulian Popescu, Liliana Luca

In the present paper the structural analysis of the Assur group of class 4 and order 2 (tetrad) is investigated. Beginning from the tetrad with revolute joints and replacing successively the revolute joint by prismatic joint, 64 kinds of tetrad are generated. The structural analysis of these kinds leads to 24 kinematic models. From these are removed the models that degenerate in four family mechanisms or mechanism with apparent family.

8

Authors: Marius Bîzgă, Onisifor Olaru, Emil Viorel Mihai

The SO2 emissions are one of the biggest problems for coal fired thermal power plants. As a result of stringent environmental protection regulations regarding SO2 emissions, SO2 must be removed from flue gases. This paper reveals technical solutions for controlling WFGD installations applied at Rovinari PP.

9

Authors: Grofu Florin, Cercel Constantin

There are many applications where it is necessary to keep humidity within certain predefined limits. Maintaining a certain level of moisture is needed from the comfort homes, special rooms for drying certain products, keeping in good conditions of old manuscripts or meteorites collectors. Typically these applications require reducing humidity to a predetermined level.

9

Authors: ANASTASIADIS P., G. METAXAS

Designers of buildings and their service systems play a key role within the building sector. Consciously or not they regularly choose between alternatives with a greater, or lesser, environmental impact. Informed choices to be made, it is essential that these professionals have insight into the relative environmental impact of the options open to them. Reliable details on the environmental effects of building materials and certain technical operations are not freely available. Up to now the environmental profiles of individual products and processes have mainly been identified by means of Life Cycle Analysis (LCA) studies, which map out the environmental effects of a particular material, from extraction through to production, use demolition and recycling. There is already substantial agreement that LCA is not suitable for comparing choices in the design process of buildings, moreover, most building products have not yet been investigated in this way. Further, these studies do not tell us how to evaluate one kind of environmental impact against another. Life cycle management is a new practical integrated and systematic approach to minimize the environmental and social-economic burdens associated with a product over its entire life cycle and value chain. Key words

10

Authors: Goce Stefanov

The paper are given the results of the comparison between the topology of full bridge and half bridge converter with serial resonant circuit, obtained by computer simulation. Results of simulations should show the differences in the design of full bridge and half bridge converters burdened with serial resonant circuit. One of the primary applications of configuration to the bridge converter with serial resonant circuit is mode of induction device for heating the metals. For defined output power and frequency of converter with serial resonant load the simulations are made in the program PowerSim, [10]. On the end of the paper are given the results from the simulation project program of semikron, Semisiel [11], for one topology on full bridge converter with IGBT module.

10

Authors: K.P.R.Rao, G.Ravi Babu, V.C.C.Raju

In this paper, we obtain two common fixed point theorems , one for two pairs of single and setvalued mappings and another for four set-valued mappings satisfying implicit contractive type conditions. 2000 Mathematics Subject Classification : 47H10 , 54H25

10

Authors: Adrian Runceanu, Marian Popescu, Mihaela Runceanu

E-learning can be a very effective tool for organizations wishing to develop staff or provide training in new products and processes. The Information and Communication Technology can be used as a resource, a resource that provides access point for information as well as real world requirements. This paper gives information about some free software which helps to create online courses and helps in teaching-learning process.

10

Authors: Mădălina Roxana Buneci

A coupled cell system is a network of dynamical systems (cells), represented by a directed graph that indicates how cells are coupled and which cells are equivalent. Golubitsky and Stewart [1-3] introduced a formal framework for obtaining information about system dynamics from the topology of the graph of couplings. The purpose of this paper is to present how Maple environment can be used for rapid development of procedures implementing this model (multiple arrows and self-couplings are allowed).

11

Authors: Šusteková D.

In this article there is described a basic concept of artificial intelligence and the main parts of expert systems (designed and created myself) especially – the inference engine designed using decision according to criteria. There are results of described expert system as Failure evaluation the same types of aircrafts at operators, Field reliability evaluation of several types of aircraft and Final evaluation according all of criteria – the weight of criteria is the same and Final evaluation according all of criteria, where the weight of criteria - flying hours costs - is changed.

11

Authors: Valeriu PLEŞEA, Marius Eremia VLAICU POPA

In the present conditions from Romania, the starting of economical reorganization process proved that great sectors and enterprises can not be closed in a short time. None the less, the number of closed objectives and discharged personnel until now creates big controversies, being a major problem hard to surmount. The effects of the reorganization in the mining industry field being much more acute, within this paper are presented, in an original way of study and analyze, the options of economical rehabilitation and working places development for the mining affected areas.