3,395 results for “DEC”

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Research ArticleOpen accessIn the abstractOn the Optimum Numbers of Stages in Vapour Compression Refrigeration SystemsDurriye Bilge, Galip TemirIn this study, cases of single-stage and multi-stage compression have been compared and contrasted through various angles while concentrating on refrigeration systems with 600 kW cooling capacity and working with ammonia. For five different numbers of stages, power consumption, costs of investment, operation and maintenance (O and M), COP and 2nd law efficiencies have been calculated. As the amount of … …American Journal of Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2004 · 6,688 accessesView PDF Cite

Research ArticleOpen accessIn the abstractParallel Iterative Algorithms with Accelerate Convergence for Solving Implicit Difference EquationsQing-Fu Liu, Wei-Jun Zhong, Mancho ManevThis study focuses on the solution of implicit difference equations, which are very difficult to compute in parallel for the diffusion equation. For improving the convergence rates and the properties of gradual-approach convergence of Segment-Classic-Implicit-Iterative (SCII) and Segment-Crank-Nicolson-Iterative (SCNI) algorithms realizing efficient iterative computation in parallel by segmenting grid domains, SCII and SCNI algorithms with accelerated convergence are studied and … …American Journal of Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2004 · 6,799 accessesView PDF Cite

Research ArticleOpen accessIn the abstractStandard Abundance Distribution of Elements in the Universe and Magic Numbers with Boltzmann ProbabilityFrederick Osman, Heinrich HoraThe decay of the standard abundance distribution of elements in the Universe for heavy elements has well-know maxima near magic numbers of the nuclear shell model and deep minima in between. Combining the maxima as a generation probability N (Z) on the proton number Z of the nuclides, a Boltzmann probability shows decay N (Z) = N’ exp (-Z/Z’). The … …American Journal of Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2004 · 7,393 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSurface Roughness Prediction Model in Machining of Carbon Steel by PCD Coated Cutting ToolsYusuf Sahin, A. Riza MotorcuThe surface roughness model in the turning of AISI 1040 carbon steel was developed in terms of cutting speed, feed rate and depth of cut using response surface methodology. Machining tests were carried out using PVD-coated tools under different cutting conditions. The surface roughness equations of cutting tools when machining the carbon steels were achieved by using the experimental data. … …American Journal of Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2004 · 7,964 accessesView PDF Cite

Research ArticleOpen accessIn the abstractVariation in the Thickness of A Fluid Interface Due to Internal Wave Propagation: A Lattice Boltzmann SimulationJ.M. Buick, D.B. Hann, J.A. CosgroveThe change in the thickness of an interface between two immiscible fluids due to the propagation of an internal capillary-gravity wave along the interface is considered using a Bhatnagar, Gross and Krook (BGK) lattice Boltzmann model of a binary of fluid. The vertical thickness of the interface is recorded from the simulations since this is the most easily measured quantities … …American Journal of Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2004 · 7,248 accessesView PDF Cite