264 research outputs found

    A Dual Mesh Method for a Non-Local Thermistor Problem

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    We use a dual mesh numerical method to study a non-local parabolic problem arising from the well-known thermistor problem.Comment: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA

    Effet de l’Ancrage des Anticipations d’Inflation Sous le RĂ©gime IntĂ©rimaire du Taux de Change au Maroc

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    L'objectif de ce travail de recherche est de modĂ©liser les mĂ©canismes qui influent sur l'ancrage des anticipations d'inflation dans deux contextes de rĂ©gime de change distincts : le rĂ©gime intĂ©rimaire en cours au Maroc et un rĂ©gime de change flottant, simulĂ© Ă  travers un calibrage contrefactuel du modĂšle. Cette modĂ©lisation vise Ă  offrir une comprĂ©hension approfondie des facteurs sous-jacents Ă  l'effet de l'ancrage des anticipations d'inflation dans ces deux cadres, permettant ainsi d'analyser et de comparer les dynamiques Ă©conomiques associĂ©es Ă  chaque rĂ©gime. En effet, cet article dĂ©montre que, sous le rĂ©gime de change intĂ©rimaire qu’adopte le Maroc, l’ancrage des anticipations d’inflation, en dĂ©pit d’ĂȘtre un gage de la crĂ©dibilitĂ© de la politique monĂ©taire, entraine un dĂ©salignement du Dirham en termes rĂ©els suite Ă  un choc d’offre exogĂšne. Cette causalitĂ© est dĂ©duite des rĂ©sultats des simulations effectuĂ©es dans le cadre d’un modĂšle d’équilibre gĂ©nĂ©ral dynamique, stochastique, semi-structurel et calibrĂ© pour le cas du Maroc. En effet, les simulations menĂ©es sous les calibrages factuel et contrefactuel permettent de graduer l’ancrage des anticipations d’inflation et de scĂ©nariser les effets de propagation du choc et le processus d’ajustement macroĂ©conomique sous deux rĂ©gimes de change, intĂ©rimaire et flottant. Ce faisant, les rĂ©ponses impulsionnelles issues de ces simulations indiquent que le dĂ©salignement du taux de change rĂ©el, dont la durĂ©e s’étend sur le long terme, s’explique par la dĂ©rive du niveau gĂ©nĂ©ral des prix, observĂ©e uniquement en prĂ©sence d’un parfait ancrage des anticipations d’inflation, conjuguĂ© Ă  la politique de stabilisation du taux de change nominal sous le rĂ©gime intĂ©rimaire. Alors que cette dĂ©viation est compensĂ©e par une dĂ©rive consĂ©quente du taux de change nominal sous le rĂ©gime flottant, elle ne l’est point sous le rĂ©gime intĂ©rimaire et finit par incliner la phase de rĂ©cession et retarder la reprise Ă©conomique. Dans cette perspective, le prĂ©sent article prĂŽne un passage vers le flottement qui soit ratifiĂ© de la crĂ©dibilitĂ© de la politique monĂ©taire, Ă  travers l’ancrage des anticipations d’inflation, sachant que cet ancrage produit un effet rĂ©cessif dans le rĂ©gime intĂ©rimaire.   The objective of this research work is to model the mechanisms that influence the anchoring of inflation expectations in two distinct exchange rate regime contexts: the current interim regime in Morocco and a floating exchange rate regime, simulated through a counterfactual calibration of the model. This modeling aims to provide an in-depth understanding of the factors underlying the effect of anchoring inflation expectations in these two frameworks, thus making it possible to analyze and compare the economic dynamics associated with each regime. In fact, this article demonstrates that, under the interim regime adopted by Morocco, the anchoring of inflation expectations, despite being a guarantee of the credibility of monetary policy, leads to a misalignment of the real exchange rate following a supply shock. This causality is deduced from the simulations within the framework of a dynamic, stochastic, semi-structural general equilibrium model calibrated for the case of Morocco. Indeed, the simulations carried out under the factual and counterfactual calibrations make it possible to graduate inflation expectations anchoring and to script the propagation of the shock and the macroeconomic adjustment process under two exchange rate regimes. The impulse responses resulting from these simulations indicate that the misalignment of the Dirham in real terms, the duration of which extends over the long term, is explained by the drift in the general price level observed only in the presence of a perfect anchoring of inflation expectations, combined with the policy of stabilizing the nominal exchange rate under the interim regime. While this deviation is offset by a significant drift in the nominal exchange rate under the floating regime, it is not offset under the interim regime and ends up tilting the recession phase and delaying economic recovery. From this perspective, this article advocates a move towards floating which is ratified by the credibility of monetary policy, through the anchoring of inflation expectations, knowing that this anchoring produces a recessive effect in the interim regime

    L’Effet RĂ©cessif de l’Ancrage des Anticipations d’Inflation sous le RĂ©gime IntĂ©rimaire du Taux de Change au Maroc

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    Cet article dĂ©montre que, sous le rĂ©gime de change intĂ©rimaire qu’adopte le Maroc, l’ancrage des anticipations d’inflation, en dĂ©pit d’ĂȘtre un gage de la crĂ©dibilitĂ© de la politique monĂ©taire, entraine un dĂ©salignement du Dirham en termes rĂ©els suite Ă  un choc d’offre exogĂšne. Cette causalitĂ© est dĂ©duite des rĂ©sultats des simulations effectuĂ©es dans le cadre d’un modĂšle d’équilibre gĂ©nĂ©ral dynamique, stochastique, semi-structurel et calibrĂ© pour le cas du Maroc. En effet, les simulations menĂ©es sous les calibrages factuel et contrefactuel permettent de graduer l’ancrage des anticipations d’inflation et de scĂ©nariser les effets de propagation du choc et le processus d’ajustement macroĂ©conomique sous deux rĂ©gimes de change, intĂ©rimaire et flottant. Ce faisant, les rĂ©ponses impulsionnelles issues de ces simulations indiquent que le dĂ©salignement du taux de change rĂ©el, dont la durĂ©e s’étend sur le long terme, s’explique par la dĂ©rive du niveau gĂ©nĂ©ral des prix observĂ©e uniquement en prĂ©sence d’un parfait ancrage des anticipations d’inflation, conjuguĂ© Ă  la politique de stabilisation du taux de change nominal sous le rĂ©gime intĂ©rimaire. Alors que cette dĂ©rive est compensĂ©e par une dĂ©rive consĂ©quente du taux de change nominal sous le rĂ©gime flottant, elle ne l’est point sous le rĂ©gime intĂ©rimaire et finit par incliner la phase de rĂ©cession et retarder la reprise Ă©conomique. Dans cette perspective, le prĂ©sent article prĂŽne un passage vers le flottement qui soit ratifiĂ© de la crĂ©dibilitĂ© de la politique monĂ©taire, Ă  travers l’ancrage des anticipations d’inflation, sachant que cet ancrage produit un effet rĂ©cessif dans le rĂ©gime intĂ©rimaire.   This article demonstrates that, under the interim regime adopted by Morocco, the anchoring of inflation expectations, despite being a guarantee of the credibility of monetary policy, leads to a misalignment of the real exchange rate following a supply shock. This causality is deduced from the simulations within the framework of a dynamic, stochastic, semi-structural general equilibrium model calibrated for the case of Morocco. Indeed, the simulations carried out under the factual and counterfactual calibrations make it possible to graduate inflation expectations anchoring and to script the propagation of the shock and the macroeconomic adjustment process under two exchange rate regimes. The impulse responses resulting from these simulations indicate that the misalignment of the Dirham in real terms, the duration of which extends over the long term, is explained by the drift in the general price level observed only in the presence of a perfect anchoring of inflation expectations, combined with the policy of stabilizing the nominal exchange rate under the interim regime. While this drift is offset by a significant drift in the nominal exchange rate under the floating regime, it is not offset under the interim regime and ends up tilting the recession phase and delaying economic recovery. From this perspective, this article advocates a move towards floating which is ratified by the credibility of monetary policy, through the anchoring of inflation expectations, knowing that this anchoring produces a recessive effect in the interim regime

    L’Effet RĂ©cessif de l’Ancrage des Anticipations d’Inflation sous le RĂ©gime IntĂ©rimaire du Taux de Change au Maroc

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    Cet article dĂ©montre que, sous le rĂ©gime de change intĂ©rimaire qu’adopte le Maroc, l’ancrage des anticipations d’inflation, en dĂ©pit d’ĂȘtre un gage de la crĂ©dibilitĂ© de la politique monĂ©taire, entraine un dĂ©salignement du Dirham en termes rĂ©els suite Ă  un choc d’offre exogĂšne. Cette causalitĂ© est dĂ©duite des rĂ©sultats des simulations effectuĂ©es dans le cadre d’un modĂšle d’équilibre gĂ©nĂ©ral dynamique, stochastique, semi-structurel et calibrĂ© pour le cas du Maroc. En effet, les simulations menĂ©es sous les calibrages factuel et contrefactuel permettent de graduer l’ancrage des anticipations d’inflation et de scĂ©nariser les effets de propagation du choc et le processus d’ajustement macroĂ©conomique sous deux rĂ©gimes de change, intĂ©rimaire et flottant. Ce faisant, les rĂ©ponses impulsionnelles issues de ces simulations indiquent que le dĂ©salignement du taux de change rĂ©el, dont la durĂ©e s’étend sur le long terme, s’explique par la dĂ©rive du niveau gĂ©nĂ©ral des prix observĂ©e uniquement en prĂ©sence d’un parfait ancrage des anticipations d’inflation, conjuguĂ© Ă  la politique de stabilisation du taux de change nominal sous le rĂ©gime intĂ©rimaire. Alors que cette dĂ©rive est compensĂ©e par une dĂ©rive consĂ©quente du taux de change nominal sous le rĂ©gime flottant, elle ne l’est point sous le rĂ©gime intĂ©rimaire et finit par incliner la phase de rĂ©cession et retarder la reprise Ă©conomique. Dans cette perspective, le prĂ©sent article prĂŽne un passage vers le flottement qui soit ratifiĂ© de la crĂ©dibilitĂ© de la politique monĂ©taire, Ă  travers l’ancrage des anticipations d’inflation, sachant que cet ancrage produit un effet rĂ©cessif dans le rĂ©gime intĂ©rimaire.   This article demonstrates that, under the interim regime adopted by Morocco, the anchoring of inflation expectations, despite being a guarantee of the credibility of monetary policy, leads to a misalignment of the real exchange rate following a supply shock. This causality is deduced from the simulations within the framework of a dynamic, stochastic, semi-structural general equilibrium model calibrated for the case of Morocco. Indeed, the simulations carried out under the factual and counterfactual calibrations make it possible to graduate inflation expectations anchoring and to script the propagation of the shock and the macroeconomic adjustment process under two exchange rate regimes. The impulse responses resulting from these simulations indicate that the misalignment of the Dirham in real terms, the duration of which extends over the long term, is explained by the drift in the general price level observed only in the presence of a perfect anchoring of inflation expectations, combined with the policy of stabilizing the nominal exchange rate under the interim regime. While this drift is offset by a significant drift in the nominal exchange rate under the floating regime, it is not offset under the interim regime and ends up tilting the recession phase and delaying economic recovery. From this perspective, this article advocates a move towards floating which is ratified by the credibility of monetary policy, through the anchoring of inflation expectations, knowing that this anchoring produces a recessive effect in the interim regime

    A Miniature RFID Antenna at UHF Band using Meander-Line Technique

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    This paper displays a new design of a small antenna proposed for radio-frequency identification (RFID) applications in the UHF band (ultra-high frequency). Our antenna is constituted of two rectangular patches linked together with a meander line. Using this technique reduction in antenna size of equal to 62% with respect to the conventional antenna was achieved. The antenna has a simple structure and small antenna size of 60 x 74mm2 or 0.184 λ0 x 0.226 λ0. It has been fabricated on a low-cost FR4 substrate and measured to validate the simulation performances.The measured bandwidth is around 54.4 MHz (889.3 - 943.7 MHz) with reflection coefficient less than 10 dB, which covers all of the American RFID band (902 - 928 MHz), Chinese RFID band (920.5 - 924.5 MHz), Korea Republic and Japan RFID band ( 917 - 923.5 MHz).The design and simulations have been effected by electromagnetic simulators HFSS and CST microwave studio. A good accord is getting between the simulated and measured results. This antenna is intended for the reader of RFID applications

    Leiomyosarcome Du Cordon Spermatique

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    Introduction: Leiomyosarcoma of the spermatic cord is a rare tumor, develops from the mesenchymal tissues of the spermatic cord, epididymis and  testicular tunics. Its incidence is 0.05 to 0.1% and the occurrence in the testis is rare. In the literature, the testicular leiomyosarcoma (LST) is reported as sporadic cases or as a very limited series. In adults, most testicular sarcomas are the result of a sarcomatous transformation of germ cell tumors (GCT) especially teratomas and spermatocytic sarcomas.Observation: We report on a pure paratesticular leiomyosarcoma and we present the histological, therapeutic and prognostic aspects of this rare tumor

    Localisation IntravĂ©sicale d’une Broche d’ostĂ©osynthĂšse (A Propos D’un Cas)

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    La variĂ©tĂ© de corps Ă©trangers introduits dans l’appareil gĂ©nito- urinaire dĂ©fie l’imagination et peut confronter l’urologue aux difficultĂ©s de leur extraction. Si leur prĂ©sence relĂšve souvent d’une pratique douteuse d’origine psychiatrique, il faut noter la possibilitĂ© d’une migration Ă  partir des espaces perivĂ©sicaux lors d’une chirurgie de voisinage ainsi qu’une introduction accidentelle durantune intervention transvĂ©sicale. Les symptĂŽmes du bas appareil urinaire, non spĂ©cifiques, sont les circonstances fortuites de dĂ©couverte de corps Ă©trangers intravĂ©sicaux. Bien que le pronostic vital ne soit pas engagĂ©, l’extractionchirurgicale ou endoscopique s’avĂšre nĂ©cessaire du fait de l’inflammation sĂ©vĂšre associĂ©e aux dommages vĂ©sicaux secondaires Ă  ce corps Ă©tranger.Nous rapportons le cas d’un jeune patient admis aux urgences chez qui on trouve une broche d’ostĂ©osynthĂšse compliquĂ©e d’une lithiase situĂ©e dans la vessie
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