Influencia del Subsistema de Aprovisionamiento de Recursos Humanos en el Desempeño Laboral de los Trabajadores de la Empresa Ediciones Unidas Culturales del municipio de Matagalpa, año 2015.

La presente investigación tiene como propósito describir el proceso de aprovisionamiento que debe de efectuarse en toda empresa no importando el giro este escrito se enfoca en el proceso de aprovisionamiento de personal que se realiza en la empresa Ediciones Unidas Culturales la cual está ubicada en el departamento de Matagalpa, este estudio corresponde al año 2015, el propósito de la presente es analizar el proceso de aprovisionamiento que se da dentro de esta empresa y contribuir al mejoramiento del sistema de administración de Recursos Humanos, lo cual será de vital importancia para las mejorar las técnicas empleadas por la Empresa en el proceso de aprovisionamiento de personal como también para los trabajadores, llevando a que su desempeño sea el óptimo de Ediciones Unidas Culturales . En la Empresa Ediciones Unidas Culturales no existe un departamento establecido de Recursos Humanos, todas las acciones relacionadas a esta área son manejadas por la gerente general. Los procesos de convocatoria, reclutamiento, proceso de selección y decisión, así como los de despidos y preparación de pasivos laborales se manejan desde la gerencia, esto debido a que el personal administrativo no es grande para asignar estas labores a otro de los colaboradores. En el equipo de ventas es donde se dan mayores niveles de rotación de personal, la naturaleza de la actividad requiere desarrollar una serie de habilidades. Debido a que la venta de literatura es el negocio focal y principal generador de ingresos para la empresa, los procesos pueden ser complicados, es un área que requiere mayor monitoreo y fomentar el desarrollo. Es por esto que esta investigación es de vital importancia para nosotros como estudiantes al obtener nuevos conocimientos sobre este proceso, pero fundamentalmente para esta empresa, porque les dará la pauta para mejorar su aplicación del sistema de recursos humanos y el subsistema de aprovisionamiento, para la sociedad y para la universidad va a formar parte de los antecedentes para estudios futuros

Inflatable Habitat Health Monitoring: Implementation, Lessons Learned, and Application to Lunar or Martian Habitat Health Monitoring

NASA's exploration mission is to send humans to the Moon and Mars, in which the purpose is to learn how to live and work safely in those harsh environments. A critical aspect of living in an extreme environment is habitation, and within that habitation element there are key systems which monitor the habitation environment to provide a safe and comfortable living and working space for humans. Expandable habitats are one of the options currently being considered due to their potential mass and volume efficiencies. This paper discusses a joint project between the National Science Foundation (NSF), ILC Dover, and NASA in which an expandable habitat was deployed in the extreme environment of Antarctica to better understand the performance and operations over a one-year period. This project was conducted through the Innovative Partnership Program (IPP) where the NSF provided the location at McMurdo Station in Antarctica and support at the location, ILC Dover provided the inflatable habitat, and NASA provided the instrumentation and data system for monitoring the habitat. The outcome of this project provided lessons learned in the implementation of an inflatable habitat and the systems that support that habitat. These lessons learned will be used to improve current habitation capabilities and systems to meet the objectives of exploration missions to the moon and Mars

Hatch Integration Testing of a NASA TransHab Derivative Woven Inflatable Module

Current options for Lunar habitat architecture include inflatable habitats and airlocks. Inflatable structures can have mass and volume advantages over conventional structures. However, inflatable structures are also perceived to carry additional risk because they are at a lower Technical Readiness Level (TRL) than more conventional metallic structures. The use of inflatable structures for habitation will require large penetrations in the inflatable structure to accommodate hatches and/or windows The Hatch Integration Test is designed to study the structural integrity of an expandable structure with an integrated hatch, and to verify mathematical models of the structure. The TransHab project developed an experimental inflatable module at Johnson Space Center in the 1990's. The TransHab design was originally envisioned for use in Mars Transits but was also studied as a potential habitat for the International Space Station (ISS)

Agentes microbianos asociados al cultivo de aguacate (Persea americana Mill) en la finca El Plantel 2020

El aguacate (Persea americana Mill) es originario de México. En Nicaragua se cultiva en las zonas de: Chinandega, León, Rivas incluyendo Belén y Tola, Carazo, Masaya y La Concepción. El presente estudio se realizó en la finca El Plantel , con el objetivo de conocer los agentes microbianos asociados al aguacate. El ensayo se estableció en una plantación de aguacate, que tenía cinco años y su estado fenológico era inicio de floración, con un marco de siembra de 6 x 6 m. El área total era de 1.8 hectáreas con una población total de 480 plantas constituida por cuatro variedades que constaban de 120 plantas. Se realizó una investigación observacional no experimental. Con un Diseño de muestreo aleatorio simple. considerando cada una de las variedades como tratamiento. Cada árbol constituía una unidad de muestreo y se seleccionaron al azar. Las variables que se midieron fueron: Número de hojas por rama, incidencia de síntomas en hojas, poblaciones de nemátodos. Se realizó un análisis estadístico no paramétrico mediante pruebas de Kruskal-Wallis. Se utilizó el programa estadístico InfoStat profesional versión 2009. No se encontró diferencias estadísticas entre las variedades de aguacate con respecto al porcentaje de incidencia de síntomas. Se encontraron en su mayoría algunos géneros de agentes microbianos que no están reportados como principales causantes de enfermedades en aguacate a excepción de la enfermedad algas anaranjadas (Cephaleurus virescens). Entre la diversidad de agentes microbianos asociados al aguacate se encontró Fusarium sp, Pestalotia sp, Bacillus sp, Candida sp, Curvularia sp, Nigrospora sp, Phoma sp, Pseudomonas sp, Pestalotia sp y nematodos del género Helicotylenchus sp, Rotylenchus sp, Scutellonema sp, Criconemoides sp, siendo predominante Rotylenchulus sp

High-performance Aqueous Redox Flow Battery (ARFB)

Chemistry and Chemical Biolog

Bio-Based Fire Retardant for Coco Lumber using Aloe barbadensis miller (Aloe Vera), Mangifera indica (Mango), or Persea americana (Avocado) and Boron Additives

Accidental fires are prevalent in low-income communities and one of the solutions to decrease fire risk is to apply fire retardants on combustible materials. While extensive research was available in creating fire retardants with inorganic chemicals, further studies are needed for bio-based fire retardants. The development of bio-based fire retardants involves testing organic matter for the presence of fire-retardant compounds such as nitrogen, phosphorus, and polyphenols. This study sought to determine the effectiveness of the peels of Aloe barbadensis miller (aloe vera), Mangifera indica (mangoes), and Persea americana (avocados) in creating bio-based fire retardants for coco lumber. Maceration was used to get the fruit and plant extracts. Boric acid and borax were also added as additives to boost fire retarding properties. The burning behavior of the lumber was observed in a modified horizontal flammability test and a modified flame spread test and measured in terms of mass loss, smoke density, char yield, and charring rate. The results revealed that among the fruits, the mango-based fire-retardant inhibited mass loss the most (M = 0.006, SD = 0.003), while the avocado-based fire-retardant inhibited smoke the most (M = 0.036, SD = 0.016). No significant difference was found among the groups as determined by One-way ANOVA and MANOVA (p \u3e 0.05). An indirect relationship was found between smoke density and char yield, which may be examined to improve the smoke suppressing ability of commercial fire retardants. Future studies may also refine the plant extracts and use standard flammability tests

Alkaline quinone flow battery

Storage of photovoltaic and wind electricity in batteries could solve the mismatch problem between the intermittent supply of these renewable resources and variable demand. Flow batteries permit more economical long-duration discharge than solid-electrode batteries by using liquid electrolytes stored outside of the battery. We report an alkaline flow battery based on redox-active organic molecules that are composed entirely of Earth-abundant elements and are nontoxic, nonflammable, and safe for use in residential and commercial environments. The battery operates efficiently with high power density near room temperature. These results demonstrate the stability and performance of redox-active organic molecules in alkaline flow batteries, potentially enabling cost-effective stationary storage of renewable energy.Engineering and Applied Science

Right ventricular contraction patterns in healthy children using three-dimensional echocardiography

Background: The right ventricle (RV) has complex geometry and function, with motion along three separate axes—longitudinal, radial, and anteroposterior. Quantitative assessment of RV function by two-dimension echocardiography (2DE) has been limited as a consequence of this complexity, whereas newer three dimensional (3D) analysis offers the potential for more comprehensive assessment of the contributors to RV function. The aims of this study were to quantify the longitudinal, radial and anteroposterior components of global RV function using 3D echocardiography in a cohort of healthy children and to examine maturational changes in these parameters. Methods: Three-dimensional contours of the RV were generated from a cohort of healthy pediatric patients with structurally normal hearts at two centers. Traditional 2D and 3D echo characteristics were recorded. Using offline analysis of 3D datasets, RV motion was decomposed into three components, and ejection fractions (EF) were calculated (longitudinal-LEF; radial-REF; and anteroposterior-AEF). The individual decomposed EF values were indexed against the global RVEF. Strain values were calculated as well. Results: Data from 166 subjects were included in the analysis; median age was 13.5 years (range 0 to 17.4 years). Overall, AEF was greater than REF and LEF (29.2 ± 6.2% vs. 25.1 ± 7.2% and 25.7 ± 6.0%, respectively; p < 0.001). This remained true when indexed to overall EF (49.8 ± 8.7% vs. 43.3 ± 11.6% and 44.4 ± 10%, respectively; p < 0.001). Age-related differences were present for global RVEF, REF, and all components of RV strain. Conclusions: In healthy children, anteroposterior shortening is the dominant component of RV contraction. Evaluation of 3D parameters of the RV in children is feasible and enhances the overall understanding of RV function, which may allow improvements in recognition of dysfunction and assessment of treatment effects in the future

Positron emission tomography and magnetic resonance imaging methods and datasets within the Dominantly Inherited Alzheimer Network (DIAN)

The Dominantly Inherited Alzheimer Network (DIAN) is an international collaboration studying autosomal dominant Alzheimer disease (ADAD). ADAD arises from mutations occurring in three genes. Offspring from ADAD families have a 50% chance of inheriting their familial mutation, so non-carrier siblings can be recruited for comparisons in case-control studies. The age of onset in ADAD is highly predictable within families, allowing researchers to estimate an individual's point in the disease trajectory. These characteristics allow candidate AD biomarker measurements to be reliably mapped during the preclinical phase. Although ADAD represents a small proportion of AD cases, understanding neuroimaging-based changes that occur during the preclinical period may provide insight into early disease stages of 'sporadic' AD also. Additionally, this study provides rich data for research in healthy aging through inclusion of the non-carrier controls. Here we introduce the neuroimaging dataset collected and describe how this resource can be used by a range of researchers