Exact and approximate expressions are established for dissipation, the power due to the shear stress at the wall and the boundary layer thickness corresponding to the motion of an Oldroyd-B fluid induced by a constantly accelerating plate. The similar expressions for Maxwell, Newtonian and second grade fluids, performing the same motion, are obtained as limiting cases of our general results. The specific features of the four models are emphasized

The aerodynamic properties (aerodynamic profile is the crucial element that generate the foil.) of a foil are strong related to the geometrical shape of the surface. The paper suggests a method for the generation of hypersustenance, which could determine the increase of the lift capacity simultaneously with the reduction of the drag force and the defining of the surface capable to generate this effect. The method consists in launching of a controlled

In the present study, the influence of the most relevant parameters of Electrical Discharge Machining over material removal rate, electrode wear and machined surface quality of a hybrid metal matrix composite material (Al/SiC) has been carried out.

Environmental Engineering and Management Journal September/October 2009, Vol. 8, No.5, 1191-1197 http://omicron.ch.tuiasi.ro/EEMJ/ The paper is a study about the symbiosis between the environmental aspects - innovation and competitive character of an industrial organization in our modern and sophisticated world. In actually global market and in conditions of world sever recession, for any organization or economic sector, the chance for surviving

In this paper the authors purpose a research about the influence of geometrical parameter of the corrugated diaphragms about the equivalent tension at the solicitation with a uniform pressure. It is an important problem in establishing optimal form and dimension, knowing influence of the geometrical parameter who describe the diaphragm. The results are presented under the form of a matrix mathematic model and for data validation the Snedecor test

Annals of DAAAM for 2008 (& Proceedings) is one of the publications of DAAAM International Organisation ( Danube Adria Association of Automation & Manufacturing ) Annals of DAAAM and Proceedings of International DAAAM Symposium are included in Index to Scientific & Technical Proceedings (ISTP/ISI Proceedings and ISTP CDROM/ ISI Proceedings) of Thomson Scientific - Institute for Scientific Information ( ISI)

This work presents some usual aspects of innovation processes, describes the prototype stage, describe the risk concept and the risk perception and give some solutions (guideline) for the risk management in prototyping phase of a product.

This paper presents some concepts and principles of modern engineering based on obtaining advantages by a large partnership with customers.

In ten chapters (200 pages) the book presents most relevant aspects of Quality Assurnce usual to industrial engineers ,but not only.Are presented aspects of statistics of Quality ,a short history of Quality,Guru-s of Quality(Juran,Feigenbaum,Ishikawa,Peters,Taguchi,etc..)

The paper describes the real posibilty of machining of industrial ceramics by high speed grinding with conventional abrasive wheels.There are presented some experimental results about the surface roughness and the productivty of the process.There are also presented some methods of quality control in mechanical engineering.