Congrès International d'Architecture Moderne

About: Congrès International d'Architecture Moderne is a based out in . It is known for research contribution in the topics: Boundary value problem & Jet (fluid). The organization has 393 authors who have published 403 publications receiving 4104 citations.

Spectral analysis of the two-particle Schrödinger operator on a lattice

Abstract: We consider a two-particle Hamiltonian on the d-dimensional lattice ℤd. We study a family of operators h(k) appearing after the “separation of the center of mass” of a system of two particles depending on the values of the total quasimomentum k ∈ 𝕋d (where 𝕋d is a d-dimensional torus). The operator h(k) is represented via the operator h(0), 0 ∈ Td, and using this result we obtain estimates for the norm and for the side of the spectrum of the operator h(k), respectively, via the norm and the side of the spectrum of h(0) . We prove the absence of singular spectrum of h(k) for any fixed Td.

An Assessment of Benchmarking Practice Relating to Complex Engineering Assets: A Case Study from an Oil and Gas Production Company

Abstract: Companies are continuously striving for world-class performance by use of various performance management tools and techniques. One such popular technique, proving effective in achieving best-in-class results, is benchmarking. A case study of an oil and gas production company, aiming to drive business performance based on best practice-based learning rather than compliance, shows how benchmarking can be effectively implemented to maintain continuous improvement. Benchmarking practice is assessed across a variety of different departments affecting operations, giving an insight into the diversity and complexities of implementing the practice yet paying attention on learning opportunities, while maintaining focus on the ultimate goal of achieving world-class performance.

Simulation of Temperature Field Redistribution Through Multistage Cooled Turbines

Abstract: The paper presents the detail investigation of temperature field evolution through multistage cooled turbines. An investigation bases on simple enough numerical simulation and allows for transient, heat transfer, viscous and some other important effects on temperature field transformation. Herewith the special test data for a number of cooled turbines are used.The developed numerical code has the following peculiarities:- a time-marching method for the unsteady Euler equation system;- a special algorithm of flow parameters averaging in mixing planes in the middle of axial gaps;- a monotone implicit scheme of second or third order accuracy in space and time.The code has been used for a numerical study of the flow pattern in a number of multistage aviation and industrial turbines. The described simulation demonstrates satisfactory correlation between the numerical and experimental data for temperature gradient attenuation in the flowpath of investigated cooled turbines.Copyright © 2001 by ASME

Evaluación de cultivares de raigrás italiano e híbrido como cultivo de invierno para ensilar en primavera

Abstract: alian ryegrass(Lolium multiflorum) cultivars, two alternative (“Promenade” and “Major”) and two non-alternative (“Sultan” and “Danergo”), and two hybrid ryegrass(Loliumboucheanum) cultivars(“Barladin” and “Barsilo”) were sown as monoculturesin the autumn of 2011 at the CIAM (coastal zone of Galicia, NW of Spain) in an experiment following an split-plot design with cultivar asthemain-plot, cutting date (sixfirst-cut datesfrom6March to 17May, followed by a second cut of regrowths at six weeks of age) as the sub-plot and ten replicates. No significant effect of cultivar in terms of drymatter (DM) and digestible organicmatter (DOM)yieldswas detected in any of the two cuts,showing all the cultivars high herbage yields(7.4 and 5.4 t DMha-1 and 5.2 and 3.5 t DOMha-1, first and second cut,respectively).Average values of crude protein (CP) content were low and, inversely,watersoluble carbohydrates(WSC) content was high in all cultivars(CP: 9.1 and 8.9 %; WSC: 28.0 and 22.6 %, first and second cut, respectively),showing onlyminor differences amongst cultivars within each cut. In the first cycle herbage yield increased from3.2 t DMha-1 and 2.3 t DOM ha-1 in earlyMarch to amaximumof 9.9 t DMha-1 and 6.7 t DOMha -1 in the first week ofMay when all ryegrassspecies headed. Average CP content was 14.7 % in the first cutting date, dropping to 6.5 % at the beginning of the heading stage. It is concluded that winter ryegrassis a high-yielding, energy-rich crop forsilage, although protein content can be verylow in late cuts. Alternative cultivars are preferable for early harvestsin spring, whilst non-alternative and hybrid ryegrasses are the best option for cuts around the heading stage.

Steady-state solution for magnetohydrodynamic rotating flow of generalized burgers' fluid in a porous medium

Abstract: The aim of this study is to determine the exact steady state solution of magnetohydrodynamic (MHD) and rotating flow of generalized Burgers fluid induced by a constant accelerated plate. This is accomplished by using the Fourier sine transform. This result is then presented in equivalent forms in terms of exponential, sine and cosine functions. Similar solutions for Burgers', Oldroyd-B, Maxwell, Second grade and Navier- Stokes fluids can be shown to appear as the limiting cases of the present exact solution. The graphical results illustrate the velocity profiles which have been determined for the flow due to the constant accelerated of an infinite flat plate.