Effective theories and constraints on new phyhsics

Anomalous moments of the top quark arises from one loop corrections to the vertices $\bar t t g$ and $\bar t t \gamma$. We study these anomalous couplings in different frameworks: effective theories, Standard Model and 2HDM. We use available experimental results in order to get bounds on these anomalous couplings.Comment: 8 pages, 2 figures, talk presented by R. Martinez at the X Mexican School of Particles and Fields, Playa del Carmen, Mexico, 200

The process μ→νeeνˉμ\mu \to \nu_{e}e\bar{\nu}_{\mu} in the 2HDM with flavor changing neutral currents

We consider the process $\mu \to \nu_{e}e\bar{\nu}_{\mu}$in the framework of a two Higgs doublet model with flavor changing neutral currents (FCNC). Since FCNC generates in turn flavor changing charged currents in the lepton sector, this process appears at tree level mediated by a charged Higgs boson exchange. From the experimental upper limit for this decay, we obtain the bound $| \xi_{\mu e}/m_{H^{\pm}}| \leq 3.8\times 10^{-3}$ where$\xi_{\mu e}$refers to the mixing between the first and second lepton generations, and $m_{H^{\pm}}$denotes the mass of the charged Higgs boson. This bound is independent on the other free parameters of the model. In particular, for $m_{H^{\pm}}\simeq 100$GeV we get $| \xi_{e\mu}|$ $\lesssim 0.38$Comment: 2 pages, no figure

Economic development, political violence and socio-political instability in Colombia : an econometric analysis using panel data

Socio-political instability is considered as an obstacle for economic and social development of countries. Therefore, Political violence as a feature of socio-political instability is a significant development constraint that generates economic problems, limits public and private investments, and damages the country’s infrastructure. This paper offers an explanation for political violence and economic development through an empirical analysis of Colombian departments that includes factors such as social conditions and narcotrafficking. We use multiple datasets to measure political violence and economic development, and we employ panel fixed-effects Driscoll and Kraay regressions and Generalized Method of Moments Estimation (GMM) for a sample of Colombian departments over the period 2000-2014. In the political violence model, we find that the aggregate-level production per capita, education, arrests and health coverage have a negative effect on political violence, whereas GINI, unemployment rate, illegal drugs and displaced population have a positive effect on violence. In the economic development model, political violence, armed actions and corruption have a negative effect on economic development, whereas population, saving, employment, political participation, manufacturing and production have a positive effect on economic development. The findings demonstrate the importance of implementing social policies and strategies against political violence to increase economic growth and development, productivity, political participation and security for the population across Colombia’s departments.peer-reviewe

Economic development, political violence and socio-political instability in Colombia : an econometric analysis using panel data

Socio-political instability is considered as an obstacle for economic and social development of countries. Therefore, Political violence as a feature of socio-political instability is a significant development constraint that generates economic problems, limits public and private investments, and damages the country’s infrastructure. This paper offers an explanation for political violence and economic development through an empirical analysis of Colombian departments that includes factors such as social conditions and narcotrafficking. We use multiple datasets to measure political violence and economic development, and we employ panel fixed-effects Driscoll and Kraay regressions and Generalized Method of Moments Estimation (GMM) for a sample of Colombian departments over the period 2000-2014. In the political violence model, we find that the aggregate-level production per capita, education, arrests and health coverage have a negative effect on political violence, whereas GINI, unemployment rate, illegal drugs and displaced population have a positive effect on violence. In the economic development model, political violence, armed actions and corruption have a negative effect on economic development, whereas population, saving, employment, political participation, manufacturing and production have a positive effect on economic development. The findings demonstrate the importance of implementing social policies and strategies against political violence to increase economic growth and development, productivity, political participation and security for the population across Colombia’s departments.peer-reviewe

La eficiencia energética en la industria manufacturera Colombiana:Una estimación con DEA y Datos de Panel

En el presente estudio se ha utilizado el método de Análisis Envolvente de Datos (DEA) para determinar las tendencias de la eficiencia energética en la industria manufacturera colombiana, tomando como referencia los sectores intensivos energéticamente (SIE). Los resultados de DEA muestran que la gran mayoría de los sectores industriales estudiados han mejorado su eficiencia energética indicando que la energía, como un factor productivo, es importante dentro de las estructuras de producción y es un elemento clave dentro del desarrollo tecnológico. En una segunda etapa, el análisis de regresión utilizando técnicas de datos paneles muestra cómo la productividad laboral, las inversiones y el capital son determinantes en los resultados de la eficiencia energética. Estos resultados indican que las políticas energéticas deben motivar la eficiencia energética a través de mejoras tecnológicas e inversiones que aumenten la productividad y disminuyan el consumo de la energía así como la contaminación ambiental.Eficiencia energética, Análisis Envolvente de Datos, Análisis de Datos Panel, industria manufacturera

An analysis for new institutionality in science, technology and innovation in Colombia using a structural vector autoregression model

Purpose: The purpose of this article is to analyze the strengths and the institutionality of the Ministry of Science Technology and Innovation (MSTI) in increasing investments in research and development as well as promoting the generation of knowledge. Design/Methodology/Approach: We use structural vector autoregression (SVAR) and structural vector error correction (SVEC) to examine the effects of institutionality in science, technology and innovation in the Ministry of Science, Technology and Innovation (MSTI) using three variables (i.e., investments in activities of science, technology and innovation (STIA), investments in research and development (R&D) and independence index). Findings: The results indicate that increasing the independence and transparency of the MSTI leads to higher investments in STIA and R&D over time. SVAR and SVEC models were used to assess the robustness and reliability of the results. Practical Implications: The results are important for assessing the effective governance and functionality of the new MSTI and its mission to adopt new policies and instruments that may strengthen science, technology and innovation in Colombia as the country migrates to a knowledge-based society. Originality/Value: In this context, Colombia opted to implement this model; using law 1951 of 2019, the country created this ministry. It is important to analyse the implications and key elements that allow the ministry to operate and achieve better investments to promote research, innovation, and the application of new technologies.peer-reviewe

Guia metodologica para planificar y administrar obras verticales

Tesis (Ingeniero Civil)--Universidad Americana, Managua, 2007Este estudio pretende elaborar una guía metodológica para planificar y administrar obras verticales de construcción con el fin de estandarizar una metodología en la preparación y ejecución de un proyecto de construcción; indicando los pasos a tomar y lo útil que será para muchos que se desenvuelven en el campo de la construcción

Métodos ativos de aquecimento cutâneo para a prevenção de hipotermia no período intraoperatório: revisão sistemática

This study analyzed the evidence available in the literature concerning the effectiveness of different active cutaneous warming systems to prevent intraoperative hypothermia. This is a systematic review with primary studies found in the following databases: CINAHL, EMBASE, Cochrane Register of Controlled Trials and Medline. The sample comprised 23 randomized controlled trials. There is evidence in the literature indicating that the circulating water garment system is the most effective in maintaining patient body temperature. These results can support nurses in the decision-making process concerning the implementation of effective measures to maintain normothermia, though the decision of health services concerning which system to choose should also take into account its cost-benefit status given the cost related to the acquisition of such systems.La finalidad del estudio fue analizar las evidencias disponibles en la literatura acerca de la efectividad de los diferentes métodos activos de calentamiento cutáneo para la prevención de hipotermia en el período intraoperatorio. Para esto, la revisión sistemática fue usada como método de revisión. La búsqueda de los estudios primarios fue efectuada en las bases de datos CINAHL, EMBASE, Cochrane Register of Controlled Trials y Medline. La muestra de la revisión abarcó 23 ensayos clínicos aleatorios controlados. La literatura ofrece evidencias que indican que el sistema de circulación de agua calentada es el método más efectivo en la manutención de la temperatura corporal. Los resultados evidenciados pueden subsidiar la toma de decisión del enfermero en la implementación de medidas efectivas para la manutención de la temperatura corporal. Sin embargo, considerando los costos de adquisición de los sistemas investigados, la elección del sistema en cada servicio de salud debería ser basada en el análisis de costo-beneficio.O estudo teve como objetivo analisar as evidências disponíveis na literatura sobre a efetividade dos diferentes métodos ativos de aquecimento cutâneo, para a prevenção de hipotermia no período intraoperatório. Para tal, a revisão sistemática foi empregada como método de revisão. A busca por estudos primários foi realizada nas bases de dados CINAHL, EMBASE, Cochrane Register of Controlled Trials e MEDLINE. A amostra da revisão foi composta por 23 ensaios clínicos randomizados controlados. Na literatura, há evidências que indicam que o sistema de circulação de água aquecida é o método mais efetivo à manutenção da temperatura corporal. Os resultados evidenciados podem subsidiar a tomada de decisão do enfermeiro na implementação de medidas efetivas para a manutenção da temperatura corporal. Recomenda-se, entretanto, que a escolha do sistema em cada serviço de saúde seja também baseada na análise custo/benefício, devido aos custos relativos à aquisição dos sistemas investigados