Slim SUSY

The new SM-like Higgs boson discovered recently at the LHC, with mass $m_h \simeq$ 125 GeV, as well as the direct LHC bounds on the mass of superpartners, which are entering into the TeV range, suggest that the minimal surviving supersymmetric extension of the SM (MSSM), should be characterized by a heavy SUSY-breaking scale. Several variants of the MSSM have been proposed to account for this result, which vary according to the accepted degree of fine-tuning. We propose an alternative scenario here, Slim SUSY, which contains sfermions with multi-TeV masses and gauginos/higgsinos near the EW scale, but it includes the heavy MSSM Higgs bosons ($H^0$, $A^0$, $H^\pm$) near the EW scale too. We discuss first the formulation and constraints of the Slim SUSY scenario, and then identify distinctive heavy Higgs signals that could be searched at the LHC, within scenarios with the minimal number of superpartners with masses near the EW scale.Comment: 16 pages, 6 figures. Section 2 has been restructured, with a new subsection and some comments added. This version matches the manuscript accepted in Physics Letters

Decays of H0/A0H^0/A^0 in supersymmetric scenarios with heavy sfermions

The recent discovery of a new boson at the LHC, which resembles a SM-like Higgs boson with $m_h=125$ GeV, is starting to provide strong guidelines into SUSY model building. For instance, the identification of such a state with the lightest CP-even Higgs boson of the MSSM ($h^0$), requires large values of $\tan\beta$ and/or heavy sfermions. One outcome of this result is the possibility to solve the SUSY flavor and CP problems by decoupling, which points towards some realization of Split-inspired SUSY scenarios, in which scalars are much heavier than gauginos and higgsinos. However, we argue here that the remaining Higgs bosons of the MSSM ($H^0$, $A^0$, $H^{\pm}$) do not have to be as heavy as the sfermions, and having them with masses near the EW scale does not pose any conflict with current MSSM constraints. We discuss then some SUSY scenarios with heavy sfermions, from a bottom-up approach, which contain the full Higgs sector, as well as a possible dark matter candidate, with masses near the EW scale, and identify distinctive signals from these scenarios that could be searched at the LHC.Comment: 25 pages, 12 figures. Title modified, one figure and some comments added, overall conclusions remained as previous versions. This last version matches the manuscript accepted in EPJ

On the existence and number of (k+1)(k+1)-kings in kk-quasi-transitive digraphs

Let $D=(V(D), A(D))$ be a digraph and $k \ge 2$ an integer. We say that $D$ is $k$-quasi-transitive if for every directed path $(v_0, v_1,..., v_k)$ in $D$, then $(v_0, v_k) \in A(D)$ or $(v_k, v_0) \in A(D)$. Clearly, a 2-quasi-transitive digraph is a quasi-transitive digraph in the usual sense. Bang-Jensen and Gutin proved that a quasi-transitive digraph $D$ has a 3-king if and only if $D$ has a unique initial strong component and, if $D$ has a 3-king and the unique initial strong component of $D$ has at least three vertices, then $D$ has at least three 3-kings. In this paper we prove the following generalization: A $k$-quasi-transitive digraph $D$ has a $(k+1)$-king if and only if $D$ has a unique initial strong component, and if $D$ has a $(k+1)$-king then, either all the vertices of the unique initial strong components are $(k+1)$-kings or the number of $(k+1)$-kings in $D$ is at least $(k+2)$.Comment: 17 page

Neural Mechanisms that Control an Innate Foraging Behavior in Caenorhabditis Elegans

The ability to efficiently locate food is critical for survival. Thus, animals modify their foraging patterns based on recent experience and current conditions to increase their likelihood of finding food. One highly conserved foraging strategy is local search, an intensive exploration over several minutes of the region where food resources were last encountered. As time since the last food encounter passes, animals transition to global search strategies to explore distant areas. The local-to-global search foraging pattern has been observed in fish, reptiles, insects, birds, and mammals, yet few studies ask how an animal’s brain generates this ancient behavior. Here, I ask this question in the nematode Caenorhabditis elegans. In Chapter 1, I characterize the behavior in wildtype animals and find that local search is a food memory that is regulated by food history and by internal satiety states. In addition, I describe the behavior in individual animals and find that although the behavior is reliable at a population level, there is large variability between individuals. In Chapter 2, I conduct a candidate genetic screen to first find a gene important for local search, and then define a circuit for local search behavior. The circuit consists of two parallel multimodal circuit modules that control local search. In each module, chemosensory or mechanosensory glutamatergic neurons that detect food-related cues trigger local search by inhibiting separate integrating neurons through a metabotropic glutamate receptor, MGL-1. The chemosensory and mechanosensory modules are separate and redundant, as glutamate release from either can drive the full behavior. In addition, the ability of the sensory modules to control local search is gated by the internal nutritional state of the animal. In Chapter 3, I characterize neuronal activity within the chemosensory module. Spontaneous activity patterns in the chemosensory module encode information about the time since the last food encounter and correlate with the foraging behavior. Glutamate acts within the module to shape activity patterns at various time scales. Taken together, these experiments reveal a circuit configuration that allows for the robust control of an innate adaptive behavior

Actualización de documentación de los procesos productivos de recepción, lavado y proceso de esterilización por óxido de etileno de la central de esterilización del Hospital de San José de Bogotá de acuerdo con los requisitos de la NTC ISO 9001:2015 para mejorar la seguridad del paciente y optimizar el uso de los recursos

Auxiliar de InvestigaciónLa central de esterilización del Hospital San José de Bogotá ha visto la necesidad de realizar la estandarización de sus procesos conforme a la norma NTC ISO 9001:2015 es por esto que la Universidad Católica de Colombia y la Fundación Universitaria de Ciencias de la Salud - FUCS han desarrollado el proyecto titulado Sistema de Gestión en la Central de Esterilización del Hospital de San José de Bogotá” con el propósito de alinear los procesos de esterilización a lo establecido por la ley ( Resolución 2183 de 2004 Julio 9) y con esto mejorar la seguridad del paciente y optimizar el uso de los recursos. Desarrollando una metodología inicial de diagnóstico para evaluar el nivel de cumplimiento de los requisitos bajo la norma NTC 9001:2015, seguidamente se realizó un benchmarking para comparar el desempeño de los procesos con respecto a otras centrales de esterilización a nivel local. Como siguiente medida se planeó el sistema de gestión de acuerdo a los requisitos de la norma y se documentaron los procesos que requerían estandarizar las actividades de acuerdo al resultado de la planeación del sistema de gestión y por último se plantearon un sistema de indicadores de gestión los cuales permiten monitorear el desempeño de los procesos en la central de esterilización.GLOSARIO RESUMEN INTRODUCCIÓN 1. GENERALIDADES 2. DESARROLLO DE LA METODOLOGÍA 3. CONCLUSIONES 4. RECOMENDACIONES BIBLIOGRAFÍAPregradoIngeniero Industria