Existence and multiplicity results for a doubly anisotropic problem with sign-changing nonlinearity

We consider in this paper the following problem $-\sum\limits_{i=1}^{N}\partial _{i}\left[ \left\vert \partial _{i}u\right\vert ^{p_{i}-2}\partial _{i}u\right] -\sum\limits_{i=1}^{N} \partial _{i}\left[ \left\vert \partial _{i}u\right\vert ^{q_{i}-2}\partial _{i}u\right] =\lambda f(u) \text{ \ }\ \text{in } \Omega,\\$ $u=0\text{ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }\ \text{on }\partial \Omega.$ Where $\Omega$ is a bounded regular domain in $\mathbb{R}^{N}$, $%

Supersymmetric mode converters

Originally developed in the context of quantum field theory, the concept of supersymmetry (SUSY) can be used to systematically design a new class of optical structures. In this work, we demonstrate how key features arising from optical supersymmetry can be exploited to control the flow of light for mode division multiplexing applications. Superpartner configurations are experimentally realized in coupled optical networks, and the corresponding light dynamics in such systems are directly observed. We show that SUSY can be judiciously utilized to remove the fundamental mode of a multimode optical structure, while establishing global phase matching conditions for the remaining set of modes. Along these lines, supersymmetry may serve as a promising platform for a new generation of versatile optical components with novel properties and functionalities.Comment: 14 pages, 4 figure

Diseño y fabricación de una herramienta de torno asistida por vibración

El presente trabajo se clasifica dentro del marco de trabajos de investigación científica, y pretende diseñar y fabricar una herramienta de torno asistida por vibración, que posibilita verificar si este fenómeno tiene algún efecto en el mecanizado o no. Concretamente, en la operación de torneado recto, lo cual allana el camino para proceder en estudiar el mecanizado asistido por vibración. Antes de entrar en el núcleo del trabajo, se exponen algunos conceptos preliminares para situarse en el entorno del trabajo. Posteriormente, se procede en el núcleo del trabajo exhibiendo las alternativas conceptuales para generar la vibración de la punta de cuchilla de corte. Después, y como paso preliminar al comienzo de la concepción de los elementos constituyentes de la herramienta asistida por vibración, se decide desarrollar el diseño basando en la alternativa consistente en la creación de un campo magnético variable para producir la vibración. Llegando a este nivel, se procede en el diseño creando una concepción en que intervienen la ingeniería eléctrica y electrónica, además de la ingeniera mecánica. A continuación, se empieza en la fabricación de un prototipo de herramienta asistida por vibración para comenzar el ensayado. Con el estudio, o ensayado, del torneado recto llevado a cabo posteriormente sin vibración y con vibración, se nota que existen diferencias en los resultados obtenidos. De modo que se observa que existe una clara influencia de los parámetros de vibración, o sea, frecuencia de excitación y amplitud, en la potencia requerida para efectuar el corte y en la rugosidad superficial, que son las magnitudes en que se ha basado para la comprobación o estudio. Sin embargo, no se logran efectos positivos en cualquier condición de corte y vibración, sino existen condiciones de corte y vibración en que se consiguen efectos positivos, condiciones en que el efecto es negativo y otras en que el efecto es simultáneamente positivo y negativo según la magnitud estudiada

La LOLF : des processus de quantification victorieux ?

Fondé principalement sur une enquête par entretiens auprês des acteurs chargés de l'élaboration de la maquette budgétaire et des indicateurs LOLF, ce travail décrit ces processus de quantification comme le produit de rapports de force entre les différentes administrations ministérielles. Il souligne combien la construction de l'information chiffrée sur le monde peut contribuer à  orienter l'action publique, subordonnant ici l'attribution des moyens à  la performance des établissements. The results of an archival and interview based survey are presented that describe two processes of quantification linked to French LOLF (a new state budget nomenclature and a performance measurement system) as the product of struggles between government departments. The paper finally underlines how calculation devices can contribute to shape government action by linking budget allocation to performance results

Fiscal Decentralization and Economic Growth in Morocco: A Panel Cointegration Analysis

This article focuses on the effects of fiscal decentralization on economic growth in Morocco, taking into account three dimensions: expenditure decentralization, revenue decentralization and the composite of these two indices. It uses a co-integration panel approach to separate long run effects from short run dynamics; By using and revising the set of data generally used in these empirical analyses. The results show that fiscal decentralization can lead to significant long-term economic growth (particularly significant for revenue decentralization), but in the short-term, this leads to a decrease in economic growth. Indeed, short-term results show that fiscal decentralization generates in the very short term a decrease in economic growth before improving over time until reaching a long-term increase between 2003 and 2014 in Morocco. Keywords: fiscal decentralization, economic growth, Morocco JEL Classifications: C2, H

Potential of heat pipe technology in nuclear seawater desalination

The official published version of this article can be found at the link below.Heat pipe technology may play a decisive role in improving the overall economics, and public perception on nuclear desalination, specifically on seawater desalination. When coupled to the Low-Temperature Multi-Effect Distillation process, heat pipes could effectively harness most of the waste heat generated in various types of nuclear power reactors. Indeed, the potential application of heat pipes could be seen as a viable option to nuclear seawater desalination where the efficiency to harness waste heat might not only be enhanced to produce larger quantities of potable water, but also to reduce the environmental impact of nuclear desalination process. Furthermore, the use of heat pipe-based heat recovery systems in desalination plant may improve the overall thermodynamics of the desalination process, as well as help to ensure that the product water is free from any contamination which occur under normal process, thus preventing operational failure occurrences as this would add an extra loop preventing direct contact between radiation and the produced water. In this paper, a new concept for nuclear desalination system based on heat pipe technology is introduced and the anticipated reduction in the tritium level resulting from the use of heat pipe systems is discussed

Topological correlations and asymptotic freedom in cellular aggregates

In random cellular systems, both observation and maximum entropy inference give a specific form to the topological pair correlation: it is bi-affine in the cells number of edges with coefficients depending on the distance between the two cells of the pair. Assuming this form for the pair correlations, we make explicit the conditions of statistical independence at large distance. When, on average, the defects do not contribute, the layer population and the enclosed topological charge both increase polynomially with distance. In dimension 2, the exponent of the leading terms depend on sum rules satisfied, or not, by the maximum entropy coefficients.Comment: Available online at http://www.sciencedirect.co

Discrete beam acceleration in uniform waveguide arrays

Within the framework of the tight-binding model we demonstrate that Wannier-Stark states can freely accelerate in uniform optical lattices. As opposed to accelerating Airy wave packets in free space, our analysis reveals that in this case the beam main intensity features self-bend along two opposite hyperbolic trajectories. Two-dimensional geometries are also considered and an asymptotic connection between these Wannier-Stark ladders and Airy profiles is presented

False aneurysm of the radial artery: Unusual complication of both-bone forearm fracture in children: A case report

False aneurysm or pseudo aneurysm of an artery in close proximity to fractured bone is a well-recognized entity, and fewer various cases, involving different sites have been reported in the literature. We report new case of a Moroccan's patient who had 10-year-old boy presented with a right non displaced both-bone forearm fracture; the patient was placed in a long arm splint. After, six weeks, the cast was removed. And a pulsatile mass on the volar-radial aspect of the forearm was decouvred. The mass was non-tender and the patient had radial and ulnar pulse. An Ultrasound and brachial angiography showed a false aneurysm of distal radial and the radial artery was ligated

Preparation and characterization of hexadecyltrimethylammonium bromide modified nanocrystalline cellulose / graphene oxide composite thin film and its potential in sensing copper ion using surface plasmon resonance technique

In this study, the preparation of hexadecyltrimethylammonium bromide modified nanocrystalline cellulose/graphene oxide composite (CTA-NCC/GO) solution under mild condition has been described. The CTA-NCC/GO thin film then was prepared by spin coating technique. Moreover, the CTA-NCC/GO thin film was characterized by Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) for the structural properties while the optical properties were characterized by ultraviolet-visible (UV–vis). FTIR confirmed the functional group that is contained in CTA-NCC/GO thin film and the surface morphology obtained from AFM results showed that the thin film is homogenous. The UV–vis analysis also showed that CTA-NCC/GO thin film has high absorption with optical band gap of 4.00 eV. Furthermore, the CTA-NCC/GO thin film has been studied to be incorporated with surface plasmon resonance spectroscopy (SPR) to detect copper ion. The SPR results showed that copper ion can be detected as low as 0.01 ppm using this thin film