Soft supersymmetry-breaking terms from supergravity and superstring models

We review the origin of soft supersymmetry-breaking terms in N=1 supergravity models of particle physics. We first consider general formulae for those terms in general models with a hidden sector breaking supersymmetry at an intermediate energy scale. The results for some simple models are given. We then consider the results obtained in some simple superstring models in which particular assumptions about the origin of supersymmetry breaking are made. These are models in which the seed of supersymmetry breaking is assumed to be originated in the dilaton/moduli sector of the theory.Comment: 24 pages, to appear in the book `Perspectives on Supersymmetry', World Scientific, Editor G. Kane; some comments and references adde

Optimal control of the Lotka–Volterra system: turnpike property and numerical simulations

The Lotka-Volterra model is a differential system of two coupled equations representing the interaction of two species: a prey one and a predator one. We formulate an optimal control problem adding the effect of hunting both species as the control variable. We analyse the optimal hunting problem paying special attention to the nature of the optimal state and control trajectories in long time intervals. To do that, we apply recent theoretical results on the frame to show that, when the time horizon is large enough, optimal strategies are nearly steady-state. Such path is known as turnpike property. Some experiments are performed to observe such turnpike phenomenon in the hunting problem. Based on the turnpike property, we implement a variant of the single shooting method to solve the previous optimisation problem, taking the middle of the time interval as starting point

Avaliação de desempenho lumínico: imagens HDR

Anais do VI Encontro de Iniciação Científica e II Encontro Anual de Iniciação ao Desenvolvimento Tecnológico e Inovação – EICTI 2017 - 04 a 06 de outubro de 2017 - temática EngenhariaCom o passar do tempo e a diminuição do espaço livre, construções existentes são adaptadas para desenvolver atividades diferentes das quais foram construídas, assim, é comum observar ambientes com pouca iluminação para desenvolver as atividades necessárias nos ambientes de trabalho, poiso ideal é que as decisões referentes à iluminação natural sejam tomadas ainda na fase inicial do projeto. Estudos de luminância analisam a qualidade de iluminação num ambiente construído, e frequentemente estão acompanhados de novas ferramentas, como é o caso do uso de fotografias, que permitem realizar o estudo de maneira rápida e econômica em relação à maneira tradicional. Portanto, as imagens HDR compostas a partir de imagens digitais podem ser utilizadas, com algumas restrições de precisão, como ferramenta para levantamento da distribuição das luminâncias num ambiente (IBAÑEZ; ZAFRA; SACHT, 2017) Com base em tais informações, o presente trabalho teve como objetivo gerar imagens de grande alcance dinâmico ou High Dynamic Range (HDR) de um ambiente, para estudo da qualidade de iluminação e comparação com dados de medição in locoUniversidade Federal da Integração Latino-Americana (Unila); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fundação Araucária; Parque Tecnológico Itaipu (PTI) e Companhia de Saneamento do Paraná (SANEPAR

Estudio de la Flora Vascular de Ilundáin (Navarra).

En este trabajo hemos realizado un estudio de la Flora Vascular presente en Ilundáin (Navarra) en una superficie aproximada de 1.35 km2. Para ello se han recolectado los ejemplares presentes en la zona durante un periodo de tres años (de 1998 a 2001) mediante la realización de herborizaciones de los distintos ambientes, diferenciados por la vegetación dominante de cada uno (robledal, hayedo, pinar, matorral,...) y en las distintas estaciones del año. Así se han recolectado 730 ejemplares pertenecientes a 294 taxones diferentes. Se ha creado un Catálogo Florístico de la zona bajo estudio donde cada taxon está acompañado por información referente a la nomenclatura (sinónimos y nombres vulgares), información biogeográfica (tipo corológico) e información ecológicofuncional (hábitats o ambientes en los que aparece, especies acompañantes, fenología, tipo biológico,...) así como todas las citas tomadas de cada uno de ellos

Atypical modulations of N170 component during emotional processing and their links to social behaviors in ex-combatants

ABSTRACT: Emotional processing (EP) is crucial for the elaboration and implementation of adaptive social strategies. EP is also necessary for the expression of social cognition and behavior (SCB) patterns. It is well-known that war contexts induce socio-emotional atypical functioning, in particular for those who participate in combats. Thus, ex-combatants represent an ideal non-clinical population to explore EP modulation and to evaluate its relation with SCB. The aim of this study was to explore EP and its relation with SCB dimensions such as empathy, theory of mind and social skills in a sample of 50 subjects, of which 30 were ex-combatants from illegally armed groups in Colombia, and 20 controls without combat experience. We adapted an Emotional Recognition Task for faces and words and synchronized it with electroencephalographic recording. Ex-combatants presented with higher assertion skills and showed more pronounced brain responses to faces than Controls. They did not show the bias toward anger observed in control participants whereby the latter group was more likely to misclassify neutral faces as angry. However, ex-combatants showed an atypical word valence processing. That is, words with different emotions yielded no differences in N170 modulations. SCB variables were successfully predicted by neurocognitive variables. Our results suggest that in ex-combatants the links between EP and SCB functions are reorganized. This may reflect neurocognitive modulations associated to chronic exposure to war experiences

Implementing ARP-Path Low Latency Bridges in NetFPGA

The demo is focused on the implementation of ARP-Path (a.k.a. FastPath) bridges, a recently proposed concept for low latency bridges. ARP-Path Bridges rely on the race between broadcast ARP Request packets, to discover the minimum latency path to the destination host. Several implementations (in Omnet++, Linux, OpenFlow, NetFPGA) have shown that ARP-Path exhibits loop-freedom, does not block links, is fully transparent to hosts and neither needs a spanning tree protocol to prevent loops nor a link state protocol to obtain low latency paths. This demo compares our hardware implementation on NetFPGA to bridges running STP, showing that ARP-Path finds lower latency paths than STP.Comunidad de MadridJunta de Comunidades de Castilla-La Manch