In this paper, we revisit some quantum mechanical aspects related to the Quantum Hall Effect. We consider a Landau type model, paying a special attention to the experimental and geometrical features of Quantum Hall experiments. The resulting formalism is then used to compute explicitely the Hall conductivity from a Kubo formula. LPT-Orsay 02-113 IPNO DR 02-025

The paper presents a speech coding algorithm for operation at 11 025 samples/s. The coder provides improved speech quality and compatibility with the MS-Windows multimedia environment. The coding algorithm has been developed by adapting the ITU G729 and enhancing it with some recent developments in the medium band coding. The coder operates over a band of frequencies ranging from 20 to 5400 Hz ...

OBJECTIVES Our objectives were to evaluate the contribution of bergamottin to the grapefruit juice-felodipine interaction and to characterize bergamottin disposition. METHODS In this study 250 mL grapefruit juice; 2-, 6-, or 12-mg capsules of bergamottin plus water; or water was administered with 5 mg extended-release felodipine to 11 volunteers in a partially randomized, 5-way crossover stud...

introduction: application of light transmitting posts to restore greatly damaged endodontically treated teeth has been increased. it is suspected that light intensity decreases as it passes throughout different materials. this can reduce the degree of conversion required for adequate bond strength throughout the length of these posts. the objective of this study was to evaluate the amount of li...

background : due to rapid advances in modern technologies such as telecommunication technology, the world has witnessed an exponential growth in the use of digital handheld devices (e.g. smartphones and tablets). this drastic growth has resulted in increased global concerns about the safety of these devices. smartphones, tablets, laptops, and other digital screens emit high levels of short-wave...

This note represents an attempt to gather the input related light-by-light scattering ($\gamma\gamma$) cross-section measurements at LHC with aim of checking consistency different standard model predictions. For first time, we also consider contribution from $\eta_b(1S)$ meson production diphoton invariant mass distribution, by calculating its inclusive photoproduction cross-section. Using a si...

025 – 1134 Ethics issues in supply management: from a literature review to a conceptual framework Mrs. Jalba Miniussi Fundação Getulio Vargas São Paulo SP Brazil Mrs. Janaina Siegler Fundação Getulio Vargas Uberlândia MG Brazil Dr. João Mario Csillag Fundação Getulio Vargas São Paulo SP Brazil POMS 23rd Annual Conference Chicago, Illinois, U.S.A. April 20 to April 23, 2012