MIPyMES influence on job creation in Texcoco, XI Region, State of Mexico

The aim of this study was to analyze MIPyMEs in Texcoco Region XI and determine their influence on job creation. According to the economic census data contained in the National Directory of Economic Units (2010 and 2014), in this area there were 18,304 establishments in 2000, with a MIPyME participation of 99.96% By 2014, this number increased to 19.801, with 99.89%. The PEA grew to 111,049 people in 2005, in comparison to 2000. For 2010, the PEA showed a significant growth to 155, 439 people, as well as the occupied people that move to 153,700.El objetivo de este trabajo es analizar las micro, pequeñas y medianas empresas (MIPyMES) en la Región XI Texcoco y determinar su influencia en la generación de empleos. Según datos recabados del censo económico contenidos en el Directorio Nacional de Unidades Económicas (DNUE, 2010 y 2014), en esta zona, para el 2010, existían 18,304 establecimientos con una participación de 99.96% para las MIPyMES. Para el 2014, esta cifra pasó a 19,801; las MIPyMES representaban el 99.89%. La PEA, en el año 2005, creció en comparación con el año 2000 al pasar a 111,049 personas. Para 2010, la PEA mostró un crecimiento significativo a pasar a 155, 439 personas. También creció la población ocupada al pasar a 153,700 personas

The impact of cultural dissonance and acculturation orientations on immigrant students' academic performance

Indexación: Scopus; Scielo; Redalyc.Prior research has documented meaningful differences between school performance of immigrant and native students. Multicultural education has been associated with academic failure of foreign students. e aim of this study was to examine the impact of a set of psychosocial variables on the perceived academic achievement of first generation immigrant adolescents from public secondary schools in Northern Spain. Results showed that 46% of the variability in foreign students’ perceived academic performance was explained by home-school cultural dissonance. We also explored the impact of acculturation orientation to separation, perception of discrimination from teachers, school adjustment, and psychological well-being in academic performance. Any multicultural education context should take into account psychosocial adjustment, given its influence on academic performance of all studentsSe han hallado diferencias significativas entre el rendimiento académico de los inmigrantes y el de los estudiantes nativos. Sin embargo, hay una escasa evidencia acerca de los aspectos psicosociales de este fenómeno. El objetivo de este estudio fue examinar el impacto de un conjunto de variables psicosociales: disonancia cultural y orientaciones de aculturación en el rendimiento académico percibido de adolescentes inmigrantes de primera generación de centros de Educación Secundaria en el Norte de España. Los resultados mostraron que alrededor del 46% de la variabilidad en el rendimiento era explicada por la disonancia cultural entre escuela y hogar. Cualquier contexto de educación multicultural ha de tomar en consideración el ajuste psicosocial, dada su influencia en el rendimiento académico de los estudiantes.http://www.redalyc.org/jatsRepo/647/64753989003/index.htm

Path Integral Approach to Strongly Nonlinear Composite

We study strongly nonlinear disordered media using a functional method. We solve exactly the problem of a nonlinear impurity in a linear host and we obtain a Bruggeman-like formula for the effective nonlinear susceptibility. This formula reduces to the usual Bruggeman effective medium approximation in the linear case and has the following features: (i) It reproduces the weak contrast expansion to the second order and (ii) the effective medium exponent near the percolation threshold are $s=1$, $t=1+\kappa$, where $\kappa$ is the nonlinearity exponent. Finally, we give analytical expressions for previously numerically calculated quantities.Comment: 4 pages, 1 figure, to appear in Phys. Rev.

Terrain adaptability strategies statically-stable for a walking hexapod robot

[EN] This article describes the forward and inverse kinematic model of position of the Hex-piderix robot, taking on account current attitude. Also three strategies to get terrain adaptability to the robot, guaranty statically stability are presented: constant orientation of the thorax, geometric strategy and emergency strategy. The designing of the adaptability strategies are considered geometric parameters and the weight of each of its components; both direct and inverse kinematics in position is essential for the robot could redirect. Statically stable is evaluated by using Normalized Energy Stability Margin. Adaptability strategies were simulated in MatLab and experimentally validated by using LabView.[ES] Este artículo presenta la cinemática directa e inversa en posición de un robot caminante hexápodo, tomando en cuenta la pose del tórax. También se presentan tres estrategias de adaptabilidad al terreno que garantizan la estabilidad: orientación constante del tórax, estrategia geométrica y estrategia de emergencia. El diseño de las estrategias de adaptabilidad considera los parámetros geométricos y el peso de todos los elementos. La cinemática directa e inversa es esencial para redireccionar la postura del robot caminante. La estabilidad de las estrategias es evaluada con el margen normalizado de estabilidad energético (NESM). Las estrategias fueron simuladas en software especializado y se validaron experimentalmente.Sandoval Castro, XY.; Castillo Castañeda, E. (2019). Estrategias de adaptabilidad estáticamente estables al cambio de terreno para un robot caminante de seis extremidades. Revista Iberoamericana de Automática e Informática. 16(3):332-343. https://doi.org/10.4995/riai.2019.8979SWORD33234316

Tree genetic resources at risk in South America: A spatial threat assessment to prioritize populations for conservation

Background Humans threat the populations of tree species by overexploitation, deforestation, land use change, and climate change. We present a novel threat assessment at intraspecific level to support the conservation of genetic resources of 80 socioeconomically viable tree species in South America. In this assessment, we evaluate the threat status of Ecogeographic Range Segments (ERSs). ERSs are groups of populations of a specific species in a certain ecological zone of a particular grid cell of a species’ geographic occupancy. Methods We used species location records to determine the species distributions and species‐specific ERSs. We distinguished eight threat situations to assess the risk of extirpation of the ERSs of all 80 species. These threat situations were determined by large or little tree cover, low or high human pressure, and low or high climate change impact. Available layers of tree cover and threats were used to determine the levels of fragmentation and direct human pressure. Maxent niche modelling with two Global Circulation Models helped determining climate change impact by the 2050s. Results When all 80 species are considered, in total, 59% of the ERSs are threatened by little tree cover or high human pressure. When climate change is also considered, then 71‐73% of the ERSs are threatened. When an increased risk of extirpation of populations outside protected areas is considered, then 84–86% of the ERSs are threatened. Seven species warrant special attention because all their ERSs are threatened across their whole distribution in South America: Balfourondendron riedelianum, Cariniana legalis, Dalbergia nigra, Handroanthus pulcherrimus, Pachira quintana, Prosopis flexuosa, and Prosopis pallida. Conclusions Our results confirm the urgency to set up a regional action plan for the conservation of tree genetic resources in South America. With this threat assessment, we aim to support governments and organizations who are taking up this task

Moderate-vigorous physical activity and health-related quality of life among Hispanic/Latino adults in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL).

BackgroundPhysical activity is a modifiable healthy behavior that has been shown to positively influence health-related quality of life. However, research examining the link between physical activity and health-related quality of life among Hispanic/Latino adults is limited and inconsistent. The purpose of this study is to assess whether accelerometer-measured moderate-vigorous physical activity (MVPA) is associated with self-reported (a) mental health-related quality of life, and (b) physical health-related quality of life among diverse Hispanic/Latino adults in the US.MethodsCross-sectional data from 12,379 adults ages 18-74 years in 2008-2011, who participated in HCHS/SOL and had complete data were analyzed using complex survey design methods. Accelerometer data were categorized into no MVPA, low, moderate, and high MVPA. Health-related quality of life was assessed with the Short-Form 12 and we used the mental and physical component subscales where higher scores indicate better health-related quality of life. Multivariate linear regression models were used to derive adjusted means with 95% confidence intervals and linear trends.ResultsWe observed no significant linear trend between accelerometer-measured MVPA and mental health-related quality of life (ptrend = 0.73). There was a significant positive association between MVPA and physical health-related quality of life (ptrend < 0.001) where higher MVPA corresponded with higher scores in physical health-related quality of life. The adjusted means were 46.67 (44.85-48.48) for no MVPA, 49.33 (49.03-49.63) for low MVPA, 50.61 (50.09-51.13) for moderate MVPA, and 51.36 (50.86-51.86) for high MVPA.ConclusionsAmong diverse Hispanic/Latino adults in the US, accelerometer-measured MVPA was associated with physical health-related quality of life, but not mental health-related quality of life. Future interventions should evaluate if increases in MVPA lead to improvements in health-related quality of life

Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB

We present results of a dark matter search performed with a 0.6 kg day exposure of the DAMIC experiment at the SNOLAB underground laboratory. We measure the energy spectrum of ionization events in the bulk silicon of charge-coupled devices down to a signal of 60 eV electron equivalent. The data are consistent with radiogenic backgrounds, and constraints on the spin-independent WIMP-nucleon elastic-scattering cross section are accordingly placed. A region of parameter space relevant to the potential signal from the CDMS-II Si experiment is excluded using the same target for the first time. This result obtained with a limited exposure demonstrates the potential to explore the low-mass WIMP region (<10 GeV/$c^{2}$) of the upcoming DAMIC100, a 100 g detector currently being installed in SNOLAB.Comment: 11 pages, 11 figure