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Search Results: 1 - 10 of 28878 matches for " Jean Pierre Bergoeing Guida "
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An hydroelectrical dam in the San Juan River? (Informative article) Una represa hidroeléctrica sobre el río San Juan? (Artículo informativo)
Jean Pierre Bergoeing Guida
Tecnología en Marcha , 2012,
Abstract: The author uses the geomorphological map of the San Juan River border sector to indicate the conse- quences for the border area with Costa Rica by the waters rising of the San Juan river hydroelectrical project. El autor utiliza el mapa geomorfológico del sector fronterizo al San Juan para indicar las consecuencias que un proyecto hidroeléctrico en el río San Juan tendría para el sector fronterizo con Costa Rica por la subida de las aguas represadas.
Photo-interprétation géomorphologique de la fa ade pacifique du Nicaragua
Mappemonde , 1987,
Abstract: Le littoral pacifique du Nicaragua est le résultat du jeu des plaques tectoniques Cara be et de l' le du Coco. C'est au Quaternaire que cette partie du Nicaragua se constitue, par apports sédimentaires continentaux et marins, isolant les actuels lacs de Xolotlan et de Cocibolca. Le littoral présente une diversité de modelés qui font son originalité.
Les dessins de Nazca et de Tarapacá, désert péruviano-chilien
Mappemonde , 1989,
Abstract: Au moyen de photographies, l'auteur illustre un des mystères du désert péruviano-chilien.
Les racines historiques d'une carte géomorphologique actuelle du Chili
Mappemonde , 1991,
Abstract: L’auteur décrit le paysage aride du nord du Chili et du sud du Pérou à travers trois cartes du XVIIIe siècle, provenant des Archives des Indes à Séville et du Musée de la Marine de Madrid. La première, générale, datant de 1791, permet de retracer les principales unités du relief. La deuxième de 1764, dessine un détail de la c te à plus grande échelle, au port d’Iquique. La troisième carte, de 1765, décrit les différents aspects physiques de la pampa du Tamarugal.
Eje Terrestre y Cambio Climático
Jean Pierre Bergoeing
Revista de Geografía, Norte Grande , 2002,
3D Ising Model:The Scaling Equation of State
Riccardo Guida,Jean Zinn Justin
Physics , 1996, DOI: 10.1016/S0550-3213(96)00704-3
Abstract: The equation of state of the universality class of the 3D Ising model is determined numerically in the critical domain from quantum field theory and renormalization group techniques. The starting point is the five loop perturbative expansion of the effective potential (or free energy) in the framework of renormalized $\phi^4_3$ field theory. The 3D perturbative expansion is summed, using a Borel transformation and a mapping based on large order behaviour results. It is known that the equation of state has parametric representations which incorporate in a simple way its scaling and regularity properties. We show that such a representation can be used to accurately determine it from the knowledge of the few first coefficients of the expansion for small magnetization. Revised values of amplitude ratios are deduced. Finally we compare the 3D values with the results obtained by the same method from the $\epsilon=4-d$ expansion.
Critical Exponents of the N-vector model
Riccardo Guida,Jean Zinn-Justin
Physics , 1998, DOI: 10.1088/0305-4470/31/40/006
Abstract: Recently the series for two RG functions (corresponding to the anomalous dimensions of the fields phi and phi^2) of the 3D phi^4 field theory have been extended to next order (seven loops) by Murray and Nickel. We examine here the influence of these additional terms on the estimates of critical exponents of the N-vector model, using some new ideas in the context of the Borel summation techniques. The estimates have slightly changed, but remain within errors of the previous evaluation. Exponents like eta (related to the field anomalous dimension), which were poorly determined in the previous evaluation of Le Guillou--Zinn-Justin, have seen their apparent errors significantly decrease. More importantly, perhaps, summation errors are better determined. The change in exponents affects the recently determined ratios of amplitudes and we report the corresponding new values. Finally, because an error has been discovered in the last order of the published epsilon=4-d expansions (order epsilon^5), we have also reanalyzed the determination of exponents from the epsilon-expansion. The conclusion is that the general agreement between epsilon-expansion and 3D series has improved with respect to Le Guillou--Zinn-Justin.
Block Layering Approach in TAST Codes  [PDF]
Zahoor Ahmed, Jean Pierre Cances, Vahid Meghdadi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.310105
Abstract: Threaded Algebraic Space Time (TAST) codes developed by Gamal et al. is a powerful class of space time codes in which different layers are combined and separated by appropriate Diophantine number . In this paper we introduce a technique of block layering in TAST codes, in which a series of layers (we call it Block layers) has more than one transmit antenna at the same time instant. As a result we use fewer layers (Diophantine numbers) for the four transmit antennas scheme, which enhances the coding gain of our proposed scheme. In each block layer we incorporate Alamouti’s transmit diversity scheme which decreases the decoding complexity. The proposed code achieves a normalized rate of 2 symbol/s. Simulation result shows that this type of codes outperforms TAST codes in certain scenarios.
Volatility Forecasting of Market Demand as Aids for Planning Manufacturing Activities  [PDF]
Jean-Pierre Briffaut, Patrick Lallement
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.34045
Abstract: The concepts and techniques designed and used for pricing financial options have been applied to assist in scheduling manufacturing activities. Releasing a manufacturing order is viewed as an investment opportunity whose properties are similar to a call option. Its value can be considered as the derivative of the market demand mirrored in the selling price of the manufactured products and changes over time following an Itô process. Dynamic programming has been used to derive the optimal timing for releasing manufacturing orders. It appears advisable to release a manufacturing when the unit selling price come to a threshold P* given by the relation P* = β/(β–1) C with C = unit cost price. β is a parameter whose value depends on the trend parameter α and the volatility σ of the selling price, the discount rate ρ applicable to the capital appreciation relevant to the business context under consideration. The results have been successfully applied to the evolution of the quarterly construction cost index in France over ten years.
Chaos Appearance during Domain Wall Motion under Electronic Transfer in Nanomagnets  [PDF]
Donfack Gildas Hermann, Jean-Pierre Nguenang
World Journal of Condensed Matter Physics (WJCMP) , 2013, DOI: 10.4236/wjcmp.2013.33022

In this paper, we study the likelihood of chaos appearance during domain wall motion induced by electronic transfer. Considering a time-varying current density theory, we proceed to a numerical investigation of the dynamics. Using the dissipation parameter, amplitude and frequency of current density as control parameters; we show how periodic regime as well as chaotic regime can be exhibited in nanomagnetic systems. Numerical results allow setting up the periodicity and quasi-periodicity of system and chaotic phenomena occurring during magnetization switching process in nanomagnet through electronic transfer.

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