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734 results for “Mechanical”
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Research ArticleOpen accessIn the abstractSustainable Production Process of Biological Mineral Feed AdditivesAgnieszka Zielińska, Katarzyna Chojnacka, Marjana SimoničProblem statement: This study discussed the problem of accumulation of Zn and Cu in the topsoil as a result of application of mineral feed additives that possess low bioavailability in animal diet. The review considered the production process of mineral feed additives in which a product supplies microelements in highly bioavailable form. Enrichment of natural biomass of edible microalgae with … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 6,950 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Effect of Time Variation on the Wear Sliding Behavior of CompositesWafaa M. Salih, Sanaa M. Salih, Myada M. SalihComposites materials are widely used in all industries all over the world, replacing many other engineering materials. Reasons for such popularity are many, among such, are their physical and mechanical properties in addition to the simplicity of their manufacturing processes. Machine elements that are made of polymeric materials are usually exposed to different causes of failure such as wear. The … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 6,984 accessesView PDFCite
Research ArticleOpen accessIn the abstractCombustion Temperature Effect of Diesel Engine Convert to Compressed Natural Gas EngineSemin, Abdul Rahim Ismail, Rosli Abu BakarEffect of combustion temperature in the engine cylinder of diesel engine convert to Compressed Natural Gas (CNG) engine was presents in this study. The objective of this study was to investigate the engine cylinder combustion temperature effect of diesel engine convert to CNG engine on variation engine speed. Problem statement: The hypothesis was that the lower performance of CNG engine … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 8,042 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Study of the Effect of Infilled Brick Walls on Behavior of Eccentrically Braced Frames Using Explicit Finite Elements MethodAmir Saedi Daryan, Masood Ziaei, Ali Golafshar et al.Problem statement: Eccentrically Braced Frames (EBFs) are usually infilled by masonry walls, but in common design, the stiffness and lateral resistance of these walls is ignored. Considering the results of carried out tests and studies, it seems that infilled masonry walls have a significant influence on the stiffness and the strength of EBFs. Since experimental test of total frame with … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 8,196 accessesView PDFCite
Research ArticleOpen accessIn the abstractReduced Order Models of a Current Source Inverter Induction Motor DriveIbrahim K. Al-AbbasProblem Statement: The current source inverter induction motor (CSI-IM) drive was widely used in various industries. The main disadvantage of this drive was nonlinearity and complexity. This work was done to develop a simple drive systems models. Approach: The MATLAB/SIMULINK software was used for system modeling. Three reduced models were developed by choosing specific frame, neglecting stator transients and ignoring … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 7,869 accessesView PDFCite
Research ArticleOpen accessIn the abstractGeoradar Measurements for the Snow Cover DensityA. GodioGround Probing Radar (GPR) devices is adopted for the analysis of thickness and the mechanical properties (density) of the snow cover in some test site in Alps, in Northern Italy. The performances of standard radar systems for the snow cover characterisation are analysed, the main aim is to assess the reliability of the method to estimate the snow density, the … …American Journal of Applied Sciences, Vol. 6, Issue 3 · 31 Mar 2009 · 7,594 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfluence of Heat Treatment in Sintering Process on Characteristics of Al2o3-Zro2 Ceramics SystemsA. Rittidech, T. TunkasiriAl2O3-ZrO2 ceramics containing 5-50 mol% ZrO2 were prepared by solid state reaction method. The bulk density, average grain size and microhardness of Al2O3-ZrO2 ceramics system as function of ZrO2 content were investigated. The dense Al2O3-ZrO2 ceramics were successfully by means of carefully control processing parameters that include sintering temperature and heating/cooling rates. These ceramics with higher ZrO2 content was obtained … …American Journal of Applied Sciences, Vol. 6, Issue 2 · 28 Feb 2009 · 7,012 accessesView PDFCite
Research ArticleOpen accessIn the abstractRisk Factors for Bacteremia and Predictors of Mortality of Patients with Bloodstream Infection with Methicillin-Resistant Staphylococcus aureusElcio Bakowski, Sérgio Barsantini Wey, Eduardo Alexandrino Servolo MedeirosThe objective of this study was to evaluate the incidence of infection and the risk factors associated to bacteraemia and mortality due to Methicillin-Resistant Staphylococcus Aureus (MRSA). This cohort study, conducted from August 2004 through November 2005, involved 60 consecutively identified patients with bloodstream MRSA infection. The control group included 240 non-infected patients, randomly selected and hospitalized on the day, … …American Journal of Infectious Diseases, Vol. 4, Issue 4 · 31 Dec 2008 · 6,955 accessesView PDFCite
Research ArticleOpen accessIn the abstractSpeed Estimation of Adaptive Fuzzy-Controlled Piezo-Electric Motor using MLP-Neural NetworkShebel ALSABBAH, Tariq MUGHRABIThe speed of ultrasonic motor of piezo-electric type is usually measured using mechanical sensors such as pulse encoders. However, these sensors are costly and bulky. In this paper, a numerical speed estimation approach of a piezo-electric motor (PEM) is implemented using multilayer perception neural network (MLP-NN). The proposed model evaluates rotational speed and load torque based on the amplitude and … …American Journal of Applied Sciences, Vol. 5, Issue 11 · 30 Nov 2008 · 6,790 accessesView PDFCite
Research ArticleOpen accessIn the abstractSelected Malaysian Wood CO2 -Laser Cutting Parameters And Cut QualityNukman Yusoff, Saiful Rizal Ismail, Azuddin Mamat, Aznijar Ahmad-YazidLaser has been used to cut most non-metallic materials very efficiently and successfully because these materials are highly absorptive by the CO2 laser wavelength of 10.6 10.6µm. Laser cutting process has been found to be reliable in loads of applications, with several advantages over other mechanical means in producing successful cut of even thermally sensitive materials such as wood. Various … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 7,799 accessesView PDFCite