Criminología ambiental y homicidio en la ciudad de Bogotá (Colombia)

Para establecer las características espaciales-ambientales de zonas que durante el segundo semestre de 2011 registraron el mayor número de homicidios en Bogotá se realizó un estudio descriptivo-observacional, enmarcado en la criminología ambiental. Se aplicó el Cuestionario de Observación Ambiental para Análisis Espacio-Temporal del homicidio en Bogotá, en 51 puntos de concentración del crimen. Los resultados reflejan la predominancia espacial-ambiental en la ocurrencia del homicidio, soportados en variables de la teoría del desorden, de territorialidad, de rutina de actividad y del espacio defendible. En consecuencia, condiciones físicas parecen facilitar el delito y percepción del potencial homicida para cometerlo. Los hallazgos permiten obtener evidencia empírica para el desarrollo de estrategias de prevención situacional del delito y, en particular, el diseño de espacios defendibles, sustentados en la intervención del territorio con acciones multidimensionales diferenciales.To determine the spatial-environmental characteristics of the districts which reported the largest number of homicides in Bogotá during the second semester of 2011, we undertook a descriptive-observational study within the framework of environmental criminology. The Questionnaire of Environmental Observation for the Spatial-Temporal Analysis of homicide in Bogotá was applied to 51 focal points of crime. The results show the predominance of spatial-environmental factors in the occurrence of homicide, backed by variables of the theory of disorder, territoriality, routine activity and the defendable space. As a consequence, the physical conditions seem to have facilitated the occurrence of crime and the perception of the potential murderer who is about to the commit one. These findings have enabled us to obtain empirical evidence for the development of strategies for the situational prevention of crime, and in particular, design defendable spaces, based on the implementation of differential multi-dimensional actions in the territory.Para estabelecer as características espaço-ambientais de áreas que, durante o segundo semestre de 2011, registraram o maior número de homicídios em Bogotá, realizou-se um estudo descritivo-observacional, focado na criminologia ambiental. Aplicou-se o Questionário de Observação Ambiental para a Análise Espaço-temporal do Homicídio em Bogotá em 51 pontos de concentração do crime. Os resultados refletem a predominância espaço-ambiental na ocorrência do homicídio, apoiado em variáveis da teoria da desordem, de territorialidade, de rotina de atividade e do espaço defendível. Em consequência, condições físicas parecem facilitar o delito e a percepção do potencial homicida para cometê-lo. As constatações permitem obter evidência empírica para o desenvolvimento de estratégias de prevenção situacional do delito e, em particular, o desenho de espaços defendíveis, apoiados na intervenção do território com ações multidimensionais diferenciais

La evaluación psicológica en los campos de la psicología jurídica en Colombia: psicología forense

En este estudio se buscó analizar los procesos de evaluación en el campo de la psicología forense en Colombia, teniendo como producto argumentativo un marco teórico acerca de la definición de la Psicología Forense (funciones y rol), sus problemas éticos, su aplicación en los diferentes campos del derecho, y sus contraflujos más recurrentes como el tipo de instrumentos y entrevistas que utiliza el psicólogo. De acuerdo con lo anterior y teniendo en cuenta los criterios de selección de los peritos para las pruebas, se diseñó una entrevista estructurada aplicada a una muestra de psicólogos del campo forense a nivel nacional realizando un análisis de corte cuantitativo sobre la experiencia del psicólogo forense, su participación en los diferentes clases de perito, las técnicas y criterios que usa como soporte en cualquier proceso, y por último, algunas conclusiones acerca del posicionamiento en que se encuentra el psicólogo forense en Colombia

A Proteomic and Cellular Analysis of Uropods in the Pathogen Entamoeba histolytica

Exposure of Entamoeba histolytica to specific ligands induces cell polarization via the activation of signalling pathways and cytoskeletal elements. The process leads to formation of a protruding pseudopod at the front of the cell and a retracting uropod at the rear. In the present study, we show that the uropod forms during the exposure of trophozoites to serum isolated from humans suffering of amoebiasis. To investigate uropod assembly, we used LC-MS/MS technology to identify protein components in isolated uropod fractions. The galactose/N-acetylgalactosamine lectin, the immunodominant antigen M17 (which is specifically recognized by serum from amoeba-infected persons) and a few other cells adhesion-related molecules were primarily involved. Actin-rich cytoskeleton components, GTPases from the Rac and Rab families, filamin, α-actinin and a newly identified ezrin-moesin-radixin protein were the main factors found to potentially interact with capped receptors. A set of specific cysteine proteases and a serine protease were enriched in isolated uropod fractions. However, biological assays indicated that cysteine proteases are not involved in uropod formation in E. histolytica, a fact in contrast to the situation in human motile immune cells. The surface proteins identified here are testable biomarkers which may be either recognized by the immune system and/or released into the circulation during amoebiasis

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

This paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s=0.9, 7, and 13Te. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the dat

Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at root s=13 TeV

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Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

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Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

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