Search results for "GRI"
showing 10 items of 10209 documents
An algebraic multigrid based shifted-Laplacian preconditioner for the Helmholtz equation
2007
A preconditioner defined by an algebraic multigrid cycle for a damped Helmholtz operator is proposed for the Helmholtz equation. This approach is well suited for acoustic scattering problems in complicated computational domains and with varying material properties. The spectral properties of the preconditioned systems and the convergence of the GMRES method are studied with linear, quadratic, and cubic finite element discretizations. Numerical experiments are performed with two-dimensional problems describing acoustic scattering in a cross-section of a car cabin and in a layered medium. Asymptotically the number of iterations grows linearly with respect to the frequency while for lower freq…
A damping preconditioner for time-harmonic wave equations in fluid and elastic material
2009
A physical damping is considered as a preconditioning technique for acoustic and elastic wave scattering. The earlier preconditioners for the Helmholtz equation are generalized for elastic materials and three-dimensional domains. An algebraic multigrid method is used in approximating the inverse of damped operators. Several numerical experiments demonstrate the behavior of the method in complicated two-dimensional and three-dimensional domains. peerReviewed
Preferential localization of Lactococcus lactis cells entrapped in a caseinate/alginate phase separated system.
2013
International audience; This study aimed to entrap bioprotective lactic acid bacteria in a sodium caseinate/sodium alginate aqueous two-phase system. Phase diagram at pH = 7 showed that sodium alginate and sodium caseinate were not miscible when their concentrations exceeded 1% (w/w) and 6% (w/w), respectively. The stability of the caseinate/alginate two-phase system was also checked at pH values of 6.0 and 5.5. Lactococcus lactis subsp. lactis LAB3 cells were added in a 4% (w/w) caseinate/1.5% (w/w) alginate two-phase system at pH = 7. Fluorescence microscopy allowed to observe that the caseinate-rich phase formed droplets dispersed in a continuous alginate-rich phase. The distribution of …
Water Consumption and Management in Schools in the City of Alicante (Southern Spain) (2000–2017): Free Water Helps Promote Saving Water?
2020
Studies on water in cities usually focus on household consumption. However, little attention has been given to non-household consumption and schools from a geographic perspective. The objectives of this research are to examine water consumption trends in schools in the city of Alicante (Southern Spain) between 2000&ndash
Agricultura i alimentació: realitats presents i desafiaments futurs
2015
Uno de los retos de la humanidad es como alimentar a una población en crecimiento sin dañar al planeta. Pensar en las necesidades actuales sin obviar que las decisiones que tomemos pueden poner en cuestión las generaciones futuras. La clave es el punto de equilibrio entre intensificación y sostenibilidad, dos conceptos que demasiado a menudo, se han visto como contradictorios y que mediante la innovación deben retroalimentarse.
Interaction between filaggrin mutations and neonatal cat exposure in atopic dermatitis
2020
Atopic dermatitis (AD) is a prevalent inflammatory skin disease. Loss-of-function mutations in filaggrin gene (FLG) represent the strongest genetic risk factors for AD, being strongly associated with early disease onset and persistence into adulthood.1 The epidermis of individuals with mutations in FLG is fundamentally different from normal skin being characterized by increased penetration of allergens.2 Recent birth cohort studies showed a significant interaction between cat ownership at birth and mutations in FLG (R501X, 2282del4) on the development of early-onset AD.3 This finding was replicated for the 2282del4 FLG mutation in a Dutch cohort study, and extended to further associate with…
Latex allergy in dentistry: clinical cases report
2010
Generally natural rubber latex (NRL) allergy is detected after some exposition to the material. As NRL is com- monly found in different materials used daily in dental clinic, the allergy can be manifested in the pediatric dentistry clinic. The first clinical manifestation can be smooth but also severe, therefore it is important to know different manifestations and how to prevent them. Objective: Report two clinical cases of natural rubber latex allergy in children and to present the safety measures that must be taken during clinical assistance, as using metallic saliva ejector, vinyl gloves for the treatment procedures and as an option to rubber dam. Cases Report: Case 1- Patient presented …
La agricultura en el País Valenciano entre el VI y el I milenio a.C.
2013
El trabajo es un intento de definir el funcionamiento de la agricultura desde la llegada de los primeros agricultores a mediados del VI milenio cal BC, hasta el fin del mundo Ibérico a inicios del s II a.C. La base es fundamentalmente el registro carpológico recuperado en 29 yacimientos, que permite conocer cuáles son las especies recolectadas y cultivadas en cada una de las fases, así como intentar una aproximación a las formas de cultivo. Para ello recurrimos a otros elementos como son las herramientas con las que cuentan los agricultores y el registro faunístico, con la intención de determinar si estos últimos están siendo utilizados como fuerza de trabajo, fundamentalmente para tirar de…
The feasibility of pulsed light processing in the meat industry
2019
Abstract Today, the increasing demand for minimally processed foods that are nutritious, sensorially acceptable, and free from microbial, chemical and physical hazards, challenges research and development to establish alternative methods to reduce the level of bacterial contamination. As one of the newly developing non-thermal methods, pulsed light is a technology for the fast, mild, and residue-free surface decontamination of meat and meat contact materials in the meat processing environment. This review provides specific information on pulsed light technology and the feasibility of its application for unpackaged and packaged meat and meat products as well as meat contact materials. The ad…
Comunità resilienti e auto sostenibili. Le politiche urbane dell’agroalimentare in Andalusia
2014
Negli ultimi anni si sono moltiplicati i dibattiti riguardanti la sovranità alimentare. Il sistema agroalimentare, complessa struttura di relazioni ecologiche, sociali ed economiche, ricopre, infatti, un ruolo importante sia per quanto riguarda la forma del territorio, sia per il sostentamento della popolazione. In Andalusia, la maggiore area agricola produttiva spagnola ed europea, si stanno plasmando differenti realtà per lo sviluppo di un sistema agroalimentare alternativo a quello industriale. Questo nuovo sistema, che in questa Comunidad conta già 43 esperienze supportate da produttori, cittadini, amministrazioni e entità scientifiche, oltre ad essere rispettoso dell’ambiente, è capace…