Relations between entanglement and purity in non-Markovian dynamics

Knowledge of the relationships among different features of quantumness, like entanglement and state purity, is important from both fundamental and practical viewpoints. Yet, this issue remains little explored in dynamical contexts for open quantum systems. We address this problem by studying the dynamics of entanglement and purity for two-qubit systems using paradigmatic models of radiation-matter interaction, with a qubit being isolated from the environment (spectator configuration). We show the effects of the corresponding local quantum channels on an initial two-qubit pure entangled state in the concurrence-purity diagram and find the conditions which enable dynamical closed formulas of concurrence, used to quantify entanglement, as a function of purity. We finally discuss the usefulness of these relations in assessing entanglement and purity thresholds which allow noisy quantum teleportation. Our results provide new insights about how different properties of composite open quantum systems behave and relate each other during quantum evolutions.Comment: 16 Pages, 10 Figures. One author added. Improved version with more references and comment

Relativistic Static Thin Disks: The Counter-Rotating Model

A detailed study of the Counter-Rotating Model (CRM) for generic finite static axially symmetric thin disks with nonzero radial pressure is presented. We find a general constraint over the counter-rotating tangential velocities needed to cast the surface energy-momentum tensor of the disk as the superposition of two counter-rotating perfect fluids. We also found expressions for the energy density and pressure of the counter-rotating fluids. Then we shown that, in general, there is not possible to take the two counter-rotating fluids as circulating along geodesics neither take the two counter-rotating tangential velocities as equal and opposite. An specific example is studied where we obtain some CRM with well defined counter-rotating tangential velocities and stable against radial perturbations. The CRM obtained are in agree with the strong energy condition, but there are regions of the disks with negative energy density, in violation of the weak energy condition.Comment: 19 pages, 6 figures. Submitted to Physical Review

Design and testing of a microchannel reactor for the PROX reaction

The different steps for manufacturing a microchannel reactor for the PROX reaction are discussed. Transient Liquid Phase bonding (TLP) using a Ni-B-Si amorphous melt spun is used for joining micromilled Al-alloyed ferritic stainless steel plates followed by recrystallization at 1200°C for 5h. A CuOx-CeO2 catalyst synthesized by the coprecipitation method was washcoated on the microchannel block resulting in a homogenous 20-30μm thick layer. The catalytic activity for CO-PROX reaction is similar in both the powder catalyst and the microchannel coated reactor but the selectivity is higher in the microchannel reactor. © 2010 Elsevier B.V.Ministerio de Ciencia e Innovación MAT-2006-12386-C05, ENE-2009-14522-C05-01, BES-2007-14409, BES-2007-15297Junta de Andalucía P06-TEP-0848

On local well-posedness of the stochastic incompressible density-dependent Euler equations

In this paper we study the stochastic inhomogeneous incompressible Euler equations in the whole space $\mathbb{R}^3$. We show the existence and pathwise uniqueness of local solutions with a multiplicative stochastic noise. Our approach is based on reducing our problem to the random problem and some estimations for type transport equations

Optimización de orientación de pieza enfocado en la minimización de estructuras de soporte

The optimization of manufacturing processes has acquired significant importance due to its ability to improve operations and reduce costs and material consumption. In the manufacturing process of specific structures, such as tensegrity structures, there is a high geometric complexity and the presence of internal areas without deposited material, reducing material consumption and the structure\u27s weight. Optimization methods are used to improve the manufacture of structures used in robotic assistance arms to define the piece\u27s orientation and the location of the supports in a 3D printing system. The objective function of this approach is to minimize the volume needed to build the regions that require support, complying with printing restrictions, and ensuring self-support and integrity of the structure. For this, an evolutionary optimization algorithm is used to determine the optimal orientation of the parts, which leads to a direct reduction in the consumption of support material and the final weight of the structure. Also, it presents an improvement in the printing quality of the piece. La optimización de los procesos de fabricación y manufactura ha adquirido una importancia significativa debido a su capacidad para mejorar procesos y reducir los costos y el consumo de material. En el proceso de fabricación de ciertas estructuras, como las estructuras de tensegridad representa una alta complejidad geométrica y una presencia de áreas internas sin material depositado, repercutiendo en una reducción en el consumo de material y el peso de la estructura. Con el objetivo de mejorar la fabricación de estructuras utilizadas en brazos robóticos asistenciales, se recurre a métodos de optimización que permiten definir la orientación de la pieza y la ubicación de los soportes en un sistema de impresión 3D. La función objetivo de este proceso es minimizar el volumen necesario para construir las regiones que requieren soporte, cumpliendo con las restricciones de impresión y garantizando el autosoporte y la integridad de la estructura. Para lograr esto, se utiliza un algoritmo de optimización evolutiva para determinar la orientación óptima de las piezas, lo que conlleva a una reducción directa en el consumo de material de soporte, en el peso final de la estructura, y presentando una mejora en la calidad de impresión de la piez

Probiotics and their potential applications in active edible films and coatings.

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Diversity of arbuscular mycorrhizal fungi (amf) in three agroecosystems with grass colosoana (Bothriochloa pertusa (L) A. Camus) in the department of Sucre

 El presente estudio evaluó la diversidad de hongos formadores de micorrizas arbusculares (HMA) asociadas a suelos de tres ecosistemas cultivados con pasto colosoana en tres localidades del departamento de Sucre, Colombia. Se recolectaron muestras de suelo, se aislaron esporas de HMA, se realizó conteo de espora y se identificaron morfotipos a nivel de especie y/o géneros. Se encontró que el género de HMA que más predomina en los suelos compactados y nativos de los tres municipios seleccionados es el género Glomus, seguido de otros géneros en menor proporción. En general los suelos que presentaron mayor riqueza de géneros de HMA fueron los del municipio de San Marcos, mientras que la menor riqueza se encontró en el municipio de Sincelejo.The present study evaluated the diversity of arbuscular mycorrhizal fungi (AMF) associated soils from three ecosystems grown with pasture colosoana in three localities of the Department of Sucre, Colombia. Soil samples were collected, AMF spores isolated, count of spore was made and morphotypes isolated were classification at the level of species or genera. We found that the genus of AMF over prevailing in native and compacted soils in the three selected municipalities is the genus Glomus, followed by other genera to a lesser extent. In general the soils that presented greater wealth of genres of HMA were those of the municipality of San Marcos, while the lowest richness was found in the municipality of Sincelejo

Cool-edge populations of the kelp Ecklonia radiata under global ocean change scenarios: strong sensitivity to ocean warming but little effect of ocean acidification

Kelp forests are threatened by ocean warming, yet effects of co-occurring drivers such as CO sub 2 /sub are rarely considered when predicting their performance in the future. In Australia, the kelp i Ecklonia radiata /i forms extensive forests across seawater temperatures of approximately 7-26 C. Cool-edge populations are typically considered more thermally tolerant than their warm-edge counterparts but this ignores the possibility of local adaptation. Moreover, it is unknown whether elevated CO sub 2 /sub can mitigate negative effects of warming. To identify whether elevated CO sub 2 /sub could improve thermal performance of a cool-edge population of i E. radiata /i , we constructed thermal performance curves for growth and photosynthesis, under both current and elevated CO sub 2 /sub (approx. 400 and 1000 atm). We then modelled annual performance under warming scenarios to highlight thermal susceptibility. Elevated CO sub 2 /sub had minimal effect on growth but increased photosynthesis around the thermal optimum. Thermal optima were approximately 16 C for growth and approximately 18 C for photosynthesis, and modelled performance indicated cool-edge populations may be vulnerable in the future. Our findings demonstrate that elevated CO sub 2 /sub is unlikely to offset negative effects of ocean warming on the kelp i E. radiata /i and highlight the potential susceptibility of cool-edge populations to ocean warming

Diseño y simulación de un controlador difuso de temperatura empleando el concresor basado en relaciones booleanas

Este  trabajo  propone  el  análisis  y  diseño  de  un controlador difuso de temperatura, usando el concresor,  basado  en  relaciones  Booleanas  (CBR). En la primera parte, se presenta el diseño del controlador Booleano. Posteriormente, se efectúa el diseño del controlador difuso partiendo del controlador  Booleano  realizado  anteriormente.  Las superficies de control obtenidas con y sin simplificación de términos evidencian las características que  tiene  la  metodología  propuesta.  Adicionalmente, se analizan los efectos que tienen las simplificaciones realizadas en las reglas de control

Nivel de indicadores de responsabilidad social empresarial (RSE) en la ese hospital local de Montelíbano, 2015.

Objective. To determine the level of corporate social responsibility indicators in order to design a strategic plan for improvement in the Local Hospital ESE Montelibano. Materials and Methods. Quantitative Cross-sectional study, the total population of managers, administrative and operational staff took the survey technique was used with application of the questionnaire as a tool to establish the level of social responsibility of the company from the perception of different interest groups such as: Managers, employees, suppliers and users identified in the sample. Once we collected the information we proceeded to the recording, processing, analysis and discussion in accordance with the objectives and results of other studies using for this purpose the preparation of statistical tables and graphs that illustrated techniques summarized and organized information. Tabulation and graphing was performed using electronic Excel spreadsheet, which allowed to make from simple math, using statistical functions, dynamic tables and graphs. Results. 56% of the population of interest groups officials and users were female, 100%, ages users ranged from 18 to 33 years, and that of officials in the range of 24 to 59 years . In the socioeconomic level found that 89.5% of users belonged to the stratum I, while 8.9% lived in stratum II and only 1.6% of the total respondents belonged to the stratum III, officials it became clear that most were classified in 65% in strata I and II. At a general level and taking into account the assessment of perception indicators in each group, the level of social responsibility of the institution is 3.0, which classified it in an unsatisfactory level. Conclusion. Although the Company shows strengths in areas related to good perception of stakeholders against factors such as promoting teamwork, non- discrimination, women’s employability,  respect for the right of settlement and layoffs, ongoing training, mechanisms of knowledge of the expectations of communities, waste minimization through the realization of green audit programs; It has a high level of dissatisfaction with aspects related to the development of its  employees and the quality of life of families and above the law benefits, little rise in women to executive positions jobs, lack of schemes of flexible work and programs to stimulate the generation of ideas. Also with the lack of enforcement of environmental certification standards, and detailed information about the destination of its products or services, they do not receive formal statement or goals of environmental principles to prevent pollution, any generation previous incentives and recognition for employees They are suggesting alternatives to contamination processes. At a general level and taking into account the assessment of perception indicators in each group, the level of social responsibility of the institution is 3.0, which classified it in an unsatisfactory level.Objetivo. Determinar el nivel de los indicadores de (RSE)  con  el  fin  de  recomendar  acciones de mejoramiento en la ESE Hospital Local de Montelibano. Materiales y métodos. Estudio descriptivo transversal cuantitativo, se tomó la población total de los funcionarios directivos, administrativos y operativos. Se utilizó la técnica de la encuesta con aplicación del cuestionario como instrumento para establecer el nivel de responsabilidad social de la empresa desde la percepción de los diferentes grupos de interés como son: Directivos,  empleados,  proveedores  y usuarios determinados en la muestra. Una vez recolectada la información se procedió al registro, procesamiento, análisis y discusión de acuerdo con los objetivos planteados y los resultados de otros estudios usando para ello  la  elaboración de cuadros estadísticos y técnicas gráficas que ilustraron en forma resumida y organizada la información. La tabulación y graficación se realizó con ayuda de la hoja electrónica de cálculo Excel, la cual permitió hacer operaciones matemáticas sencillas, uso de funciones estadísticas, hasta tablas dinámicas y gráficos. Resultados. el 56% de la población de los grupos de interés, funcionarios y usuarios, era de sexo femenino, 100% de las edades de los usuarios osciló entre 18 a 33 años, y la de los funcionarios en el intervalo de los 24 a 59 años. En el nivel socioeconómico encontramos que el 89.5% de los usuarios perteneció al estrato I, mientras que el 8.9% vivían en estrato II y solo el  1.6%  del total encuestados pertenecieron al estrato III, en los funcionarios se evidenció que la mayoría se clasificaron en un 65% en los estratos I y II. A nivel general y teniendo en cuenta la valoración de la percepción en cada grupo de indicadores, el nivel de Responsabilidad Social de la institución es de 3,0, la cual la clasificó en un nivel poco satisfactorio. Conclusiones. Aunque la Empresa muestra fortalezas en aspectos relacionados con la buena percepción que tienen los grupos de interés frente a factores como el fomento del trabajo en equipo, la no discriminación, la empleabilidad femenina, respeto al derecho de liquidación y despidos, capacitaciones continuas, mecanismos de conocimiento de las expectativas de las comunidades, minimización de desperdicios a través de la realización de programas de auditoría verde; presenta un alto nivel de insatisfacción en aspectos relacionados con el desarrollo de sus empleados y la calidad de vida de las familias y prestaciones superiores a la ley, poco ascenso en empleos femeninos a posiciones ejecutivas, falta de esquemas de trabajos flexibles y de programas para estimular la generación de ideas. Igualmente con la falta de aplicación de normas de certificación ambiental e información detallada del destino de sus productos y o servicios, no perciben metas formales ni declaración de principios medio ambientales para prevenir la contaminación, como tampoco la generación de incentivos previos y reconocimientos para los empleados que sugieran alternativas a los procesos de contaminación. A nivel general y teniendo en cuenta la valoración de la percepción en cada grupo de indicadores, el nivel de Responsabilidad Social de la institución es de 3.0, la cual la clasificó en un nivel poco satisfactorio