Fine structure in the large n limit of the non-hermitian Penner matrix model

In this paper we apply results on the asymptotic zero distribution of the Laguerre polynomials to discuss generalizations of the standard large $n$ limit in the non-hermitian Penner matrix model. In these generalizations $g_n n\to t$, but the product $g_n n$ is not necessarily fixed to the value of the 't Hooft coupling $t$. If $t>1$ and the limit $l = \lim_{n\rightarrow \infty} |\sin(\pi/g_n)|^{1/n}$ exists, then the large $n$ limit is well-defined but depends both on $t$ and on $l$. This result implies that for $t>1$ the standard large $n$ limit with $g_n n=t$ fixed is not well-defined. The parameter $l$ determines a fine structure of the asymptotic eigenvalue support: for $l\neq 0$ the support consists of an interval on the real axis with charge fraction $Q=1-1/t$ and an $l$-dependent oval around the origin with charge fraction $1/t$. For $l=1$ these two components meet, and for $l=0$ the oval collapses to the origin. We also calculate the total electrostatic energy $\mathcal{E}$, which turns out to be independent of $l$, and the free energy $\mathcal{F}=\mathcal{E}-Q\ln l$, which does depend of the fine structure parameter $l$. The existence of large $n$ asymptotic expansions of $\mathcal{F}$ beyond the planar limit as well as the double-scaling limit are also discussed

Dynamic impedances of bridge abutments

The soil-structure interaction at bridge abutments may introduce important changes in the dynamic properties of short to medium span bridges. The paper presents the results obtained, through the use of the Boundary Element Method (B.E.M.) technique in several typical situations, including semiinfinite and layered media. Both stiffness and damping properties are included

Supporting task creation inside FPGA devices

The most common model to use co-processors/accelerators is the master-slave model where the slaves (coprocessors/ accelerators) are driven by a general purpose cpu. This simplifies the management of the accelerators because they cannot actively interact with the runtime and they are just passive slaves that operate over the memory under demand. However, the master-slave model limits system possibilities and introduces synchronization overheads that could be avoided. To overcome those limitations and increase the possibilities of accelerators, we propose extending task based programming models (like OpenMP [1] or OmpSs) to support some runtime APIs inside the FPGA co-processor. As a proof-of-concept, we implemented our proposal over the OmpSs@FPGA environment [2] adding the needed infrastructure in the FPGA bitstream and modifying the existing tools to support creation of children tasks inside a task offloaded to an FPGA accelerator. In addition, we added support to synchronize the children tasks created by a FPGA task regardless they are executed in a SMP host thread or they also target another FPGA accelerator in the same co-processor

Anoftalmía y microftalmía congénitas. Prótesis oculares

En este trabajo se revisan las características más import antes de la a noftalmía y microftalmía congénitas para un mejor abordaje de su tratamiento principal. Estas anomalí as, se caracterizan por la ausencia y disminución en el tamaño del globo ocular respectivamente, lo que confiere a las personas afectadas una gran discapacidad visual, que puede ir desde una disminución de la agudeza visual hasta la ceguera total. L a pérdi da congénita del ojo es la razón más importante de hipodesarrollo orbitario, que da lugar a consecuencias funcionales, físicas y psicológicas . En caso de ceguera, el objetivo principal se basa en la estimulación precoz del crecimiento de la órbita, donde juegan un papel muy importante el oftalmólogo y el óptico - optometrista como ocularista . Por lo que se propone profundizar en el tratamiento de estas afecciones y en especial en la adaptación de conformadores y prótesis oculares, por ser considerado como uno de los tratamientos de elección.Universidad de Sevilla. Grado en Óptica y Optometrí

¿Chatarra o cultura material? a propósito de los restos muebles de la Guerra Civil en el registro arqueológico de la ciudad de Oviedo (Asturias)

En Asturias el “Patrimonio de la Guerra Civil” y la práctica arqueológica a él asociada, se encuentran en un estado de gestación intelectual. Los restos de arquitectura e ingeniería se sitúan en un nivel de desamparo legislativo, a no ser por algunas medidas de carácter puntual tomadas por la administración regional, y por la llamada “Ley de Memoria Histórica”. Pese a este panorama tan desalentador se está originando en la sociedad asturiana un debate sobre el interés de la conservación de estos elementos. Si como acaba de ser apuntado, el patrimonio inmueble de este periodo se encuentra en fase de reconocimiento; la cultura material, en su variedad de elementos muebles, no es admitida dentro de la secuencia arqueológica. En este descarte, confluyen una serie de factores de distinto carácter emanados tanto de la naturaleza del propio resto como de las propias prácticas arqueológicas

Fuzzy memoization for floating-point multimedia applications

Instruction memoization is a promising technique to reduce the power consumption and increase the performance of future low-end/mobile multimedia systems. Power and performance efficiency can be improved by reusing instances of an already executed operation. Unfortunately, this technique may not always be worth the effort due to the power consumption and area impact of the tables required to leverage an adequate level of reuse. In this paper, we introduce and evaluate a novel way of understanding multimedia floating-point operations based on the fuzzy computation paradigm: performance and power consumption can be improved at the cost of small precision losses in computation. By exploiting this implicit characteristic of multimedia applications, we propose a new technique called tolerant memoization. This technique expands the capabilities of classic memoization by associating entries with similar inputs to the same output. We evaluate this new technique by measuring the effect of tolerant memoization for floating-point operations in a low-power multimedia processor and discuss the trade-offs between performance and quality of the media outputs. We report energy improvements of 12 percent for a set of key multimedia applications with small LUT of 6 Kbytes, compared to 3 percent obtained using previously proposed techniques.Peer ReviewedPostprint (published version

Data Science and Big Data in Energy Forecasting

This editorial summarizes the performance of the special issue entitled Data Science and Big Data in Energy Forecasting, which was published at MDPI’s Energies journal. The special issue took place in 2017 and accepted a total of 13 papers from 7 different countries. Electrical, solar and wind energy forecasting were the most analyzed topics, introducing new methods with applications of utmost relevance.Ministerio de Competitividad TIN2014-55894-C2-RMinisterio de Competitividad TIN2017-88209-C2-