Análisis de las causas de rotación de personal de la empresa Holcrest S.A.S

La retención del personal es una parte importante de los esfuerzos del área de recursos humanos y de la organización en general, ya que la desvinculación representa costos y daño de la imagen organizacional. Es así como el estudio y análisis de la retención de personal se ha convertido en parte de la gestión organizacional. Con la presente investigación se busca analizar las causas que inciden en la rotación de personal en la empresa prestadora de servicios del grupo Holcim, Holcrest S.A.S, ubicada en la ciudad de Medellín. El análisis parte de datos suministrados por la organización y derivados de una encuesta a los empleados activos. Con base en esta encuesta, se realiza un estudio cuantitativo de tipo descriptivo. Los resultados muestran que las causas que más afectan en la rotación de personal son: el salario, oportunidades de carrera, reconocimiento, cooperación entre áreas, balance vida-trabajo e innovación. Estos se convierten en los puntos a tener en cuenta por parte de la organización para que tome decisiones que ayuden a minimizar la rotación por dichas causas mencionadas.

Defining the Resolution of a Network for Transportation Analyses: a New Method to Improve Transportation Planning Decisions

Travel demand models are important tools used in the analysis of transportation plans, projects, and policies. The modeling results are useful for transportation planners making transportation decisions and for policy makers developing transportation policies. Defining the level of detail (i.e., the number of roads) of the transport network in consistency with the travel demand model’s zone system is crucial to the accuracy of modeling results. However, travel demand modelers have not had tools to determine how much detail is needed in a transport network for a travel demand model. This dissertation seeks to fill this knowledge gap by (1) providing methodology to define an appropriate level of detail for a transport network in a given travel demand model; (2) implementing this methodology in a travel demand model in the Baltimore area; and (3) identifying how this methodology improves the modeling accuracy. All analyses identify the spatial resolution of the transport network has great impacts on the modeling results. For example, when compared to the observed traffic data, a very detailed network underestimates traffic congestion in the Baltimore area, while a network developed by this dissertation provides a more accurate modeling result of the traffic conditions. Through the evaluation of the impacts a new transportation project has on both networks, the differences in their analysis results point out the importance of having an appropriate level of network detail for making improved planning decisions. The results corroborate a suggested guideline concerning the development of a transport network in consistency with the travel demand model’s zone system. To conclude this dissertation, limitations are identified in data sources and methodology, based on which a plan of future studies is laid out.

The mosaic of habitats of the Seine estuary: Insights from food-web modelling and network analysis

Ecological network analysis was applied in the Seine estuary ecosystem, northern France, integrating ecological data from the years 1996 to 2002. The Ecopath with Ecosim (EwE) approach was used to model the trophic flows in 6 spatial compartments leading to 6 distinct EwE models: the navigation channel and the two channel flanks in the estuary proper, and 3 marine habitats in the eastern Seine Bay. Each model included 12 consumer groups, 2 primary producers, and one detritus group. Ecological network analysis was performed, including a set of indices, keystoneness, and trophic spectrum analysis to describe the contribution of the 6 habitats to the Seine estuary ecosystem functioning. Results showed that the two habitats with a functioning most related to a stressed state were the northern and central navigation channels, where building works and constant maritime traffic are considered major anthropogenic stressors. The strong top-down control highlighted in the other 4 habitats was not present in the central channel, showing instead (i) a change in keystone roles in the ecosystem towards sediment-based, lower trophic levels, and (ii) a higher system omnivory. The southern channel evidenced the highest system activity (total system throughput), the higher trophic specialisation (low system omnivory), and the lowest indication of stress (low cycling and relative redundancy). Marine habitats showed higher fish biomass proportions and higher transfer efficiencies per trophic levels than the estuarine habitats, with a transition area between the two that presented intermediate ecosystem structure. The modelling of separate habitats permitted disclosing each one's response to the different pressures, based on their a priori knowledge. Network indices, although non-monotonously, responded to these differences and seem a promising operational tool to define the ecological status of transitional water ecosystems.

Spatial behavior of two coral reef fishes within a Caribbean Marine Protected Area

A better understanding of the key ecological processes of marine organisms is fundamental to improving design and effective implementation of marine protected areas (MPAs) and marine biodiversity. The movement behavior of coral reef fish is a complex mechanism that is highly linked to species life-history traits, predation risk and food resources. We used passive acoustic telemetry to study monthly, daily and hourly movement patterns and space use in two species, Schoolmaster snapper (Lutjanus apodus) and Stoplight parrotfish (Sparisoma viride). We investigated the spatial overlap between the two species and compared intra-specific spatial overlap between day and night. Presence-absence models showed different diel presence and habitat use patterns between the two species. We constructed a spatial network of the movement patterns, which showed that for both species when fish were detected by the array of receivers most movements were made around the coral reef habitat while occasionally moving to silt habitats. Our results show that most individuals made predictable daily crepuscular migrations between different locations and habitat types, although individual behavioral changes were observed for some individuals across time. Our study also highlights the necessity to consider multiple species during MPA implementation and to take into account the specific biological and ecological traits of each species. The low number of fish detected within the receiver array, as well as the intraspecific variability observed in this study, highlight the need to compare results across species and individuals to be used for MPA management.

Continuum tensor network field states, path integral representations and spatial symmetries

A natural way to generalize tensor network variational classes to quantum field systems is via a continuous tensor contraction. This approach is first illustrated for the class of quantum field states known as continuous matrix-product states (cMPS). As a simple example of the path-integral representation we show that the state of a dynamically evolving quantum field admits a natural representation as a cMPS. A completeness argument is also provided that shows that all states in Fock space admit a cMPS representation when the number of variational parameters tends to infinity. Beyond this, we obtain a well-behaved field limit of projected entangled-pair states (PEPS) in two dimensions that provide an abstract class of quantum field states with natural symmetries. We demonstrate how symmetries of the physical field state are encoded within the dynamics of an auxiliary field system of one dimension less. In particular, the imposition of Euclidean symmetries on the physical system requires that the auxiliary system involved in the class' definition must be Lorentz-invariant. The physical field states automatically inherit entropy area laws from the PEPS class, and are fully described by the dissipative dynamics of a lower dimensional virtual field system. Our results lie at the intersection many-body physics, quantum field theory and quantum information theory, and facilitate future exchanges of ideas and insights between these disciplines.

Propuesta para el mejoramiento de la calidad de los servicios del Area de Salud No 2 del cantón Gualaquiza 2000

Aplicando el método descriptivo y propositivo se pretende conocer la realidad en la que se encuentran inmersos los servicios de salud que presta el área en el cantón Gualaquiza, para de ahí elaborar la propuesta. Antecedentes, se consideró la estructura del país, la modernización del Estado y las propuestas de reformas del sector de salud. Se analiza la situación actual en la que se debate las familias gualaquicenses a través de utilizar el diagnóstico de tipo participativo, en donde se conoce las expresiones del deterioro de las condiciones de salud de la población, a través de la mortalidad, morbilidad, patologías prevalentes en la zona y su acceso y satisfacción a los servicios que presta el Hospital "Misereor". Encuesta aplicada a 375 usuarios mayores de 17 años que acuden a los servicios de la unidad operativa de mayor complejidad del área . Se evalúa la situación del sector salud considerando en ello los varios de los elementos planteados por las propuestas de reforma que en algunos casos se ejecutan en la jefatura de área, se describe y se explica la situación de la institución, actividadades y recursos con los que se cuentan para otorgar servicios de salud, esto mediante reuniones de tipo formal e informal con todo el personal que labora en el área. Finalmente se procede a la elaboración de la propuesta que asienta en tres planteamientos: 1. Reorganización del sistema administrativo del área de salud; 2. reestructuración de los procesos de atención y, 3. un planteamiento de procesos de educación continua para el personal de salud.ai

A series of trials in the UK as part of the Ofcom TV white spaces pilot

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Programa de intervención para mejorar conocimientos y actitudes sobre la tuberculosis y captar sintomáticos respiratorios. Area 1 de Salud del Cañar. 2007

Con el objetivo de aplicar un programa de capacitación personal para mejorar conocimientos y prácticas sobre el control de la tuberculosis y mejorar la captación de sintomáticos respiratorios. Materiales y métodos: con un diseño cuasi experimental se incluyeron 63 profesionales sanitarios: 33 médicos, 17 odontólogos, 11 enfermeras y 2 obstetrices, distribuidos en 29 unidades operativas; 2 Centros de Salud, 16 subcentros de Salud y 12 puestos de Salud, pertenecientes al Ministerio de Salud Pública. Se aplicó un tes de 20 preguntas para evaluar conocimientos y prácticas antes de la intervención y otro de igual numero para medir el efecto de la intervención después de cumplir el programa de capacitación. Resultados: antes de la intervención, el promedio de respuestas correctas fue de 35,8 ± 4,3 (entre 23 y 56). El incremento de conocimientos fue significativo (p= 0,0001). La captación de sintomáticos respiratorios se incrementó en un 17% en los dos trimestres posteriores a la capacitación, RR 7,8 (IC95% 1,8-32,9) P=0,0003. En cuarto trimestre descendió a los valores pre intervención. Implicaciones: un programa de capacitación permanente sobre control de la Tuberculosis es una estrategia válida para mejorar los conocimientos y las prácticas sanitarias tendientes a incrementar la captación de sintomáticos respiratorios como la mejor medida para detectar la enfermedad

Investigation and prediction of sea level variations in the northern coasts of Persian Gulf using artificial neural network

Sea- level variations have a significant impact on coastal areas. Prediction of sea level variations expected from the pre most critical information needs associated with the sea environment. For this, various methods exist. In this study, on the northern coast of the Persian Gulf have been studied relation to the effectiveness of parameters such as pressure, temperature and wind speed on sea leve and associated with global parameters such as the North Atlantic Oscillation index and NAO index and present statistic models for prediction of sea level. In the next step by using artificial neural network predict sea level for first in this region. Then compared results of the models. Prediction using statistical models estimated in terms correlation coefficient R = 0.84 and root mean square error (RMS) 21.9 cm for the Bushehr station, and R = 0.85 and root mean square error (RMS) 48.4 cm for Rajai station, While neural network used to have 4 layers and each middle layer six neurons is best for prediction and produces the results reliably in terms of correlation coefficient with R = 0.90126 and the root mean square error (RMS) 13.7 cm for the Bushehr station, and R = 0.93916 and the root mean square error (RMS) 22.6 cm for Rajai station. Therefore, the proposed methodology could be successfully used in the study area.

EL BIBLIOTECÓLOGO FRENTE A LA REVOLUCION DE LA INFORMACIÓN

El panorama que se tiene es difícil de enfrentar en un mundo de pasos gigantescos en donde el avance de la tecnología se ve todos los días. Los problemas que presentan las unidades de información documental como presupuesto, personal y espacio físico, además de un usuario líder en el manejo de Internet y la cantidad de información que está disponible para todos en la red mundial, es un reto que debe desafiar el bibliotecólogo actual, en un mundo de cambios constantes y que son difíciles de alcanzar, pero que deben ser la meta de todo profesional en el área.El bibliotecólogo como un profesional destacado en el manejo de la información, debe estar al día en los últimos adelantos tecnológicos para manipular la inmensa cantidad de documentación que está en los centros en forma impresa, así como aquella que está en el mundo viajando por autopistas electrónicas y algunas veces sin control.Hoy todavía no se ha olvidado la impresión en papel, pero sí se está viviendo un cambio fuerte en la forma de enviar los productos y servicios que se deben brindar en una unidad de información, sea ésta de ente público o privado, especializada o general.El mundo nos pide un cambio y un acelerado proceso en nuestras mentes que asimile parte de este desarrollo globalizado que la sociedad está viviendo a pasos gigantescos.

The “handwriting brain”: a motor/linguistic network with specialized “writing-specific” areas?

International audience

Catalogue of data and platforms at Network GDAC level, including the example of Copernicus In Situ TAC

This document presents catalogue techniques used at network GDAC level to facilitate the discovery of platforms and data files. Some AtlantOS networks are organized as DAC-GDACs that continuously update a catalogue of metadata on observation datasets and platforms: • A DAC is a Data Assembly Centre operating at national or regional scale. It manages data and metadata for its area with a direct link to Scientifics and Operators. The DAC pushes observations to the network GDAC. • A GDAC is a Global Data Assembly Centre. It is designed for a global observation network such as Argo, OceanSITES, DBCP, EGO, Gosud, etc… The GDAC aggregates data and metadata of an observation network, in real-time and delayed mode, provided by DACs.

Stochastic simulation of time-series models combined with geostatistics to predict water-table scenarios in a Guarani Aquifer System outcrop area, Brazil

Stochastic methods based on time-series modeling combined with geostatistics can be useful tools to describe the variability of water-table levels in time and space and to account for uncertainty. Monitoring water-level networks can give information about the dynamic of the aquifer domain in both dimensions. Time-series modeling is an elegant way to treat monitoring data without the complexity of physical mechanistic models. Time-series model predictions can be interpolated spatially, with the spatial differences in water-table dynamics determined by the spatial variation in the system properties and the temporal variation driven by the dynamics of the inputs into the system. An integration of stochastic methods is presented, based on time-series modeling and geostatistics as a framework to predict water levels for decision making in groundwater management and land-use planning. The methodology is applied in a case study in a Guarani Aquifer System (GAS) outcrop area located in the southeastern part of Brazil. Communication of results in a clear and understandable form, via simulated scenarios, is discussed as an alternative, when translating scientific knowledge into applications of stochastic hydrogeology in large aquifers with limited monitoring network coverage like the GAS.

Observação e análise numa equipa de futebol de elite : relatório de estágio na area de observação e análise do Benfica LAB, Sport Lisboa e Benfica, equipas profissionais, época 2014-2015

Este relatório teve como objetivo a sumarização das práticas realizadas de um estagiário na área de Observação e Análise de Jogo do Benfica Lab-Sport Lisboa e Benfica. Consiste neste trabalho a descrição das diversas tarefas operacionais e complementares realizadas por um estagiário na área já referida. Acrescendo a essas descrições, é apresentado em detalhe um estudo de investigação iniciado durante o processo de estágio, tendo sido todos os dados recolhidos nesse período e fornecidos quase exclusivamente pela área de observação e análise do Benfica Lab. Este estudo demonstrou existirem diferenças significativas em medidas de centralidade individuais (nível de intermediação numa rede social; influência numa rede social) da equipa A para a equipa B na mesma posição (posto especifico). A descrição detalhada de todo o processo envolvente à realização de uma conferência (relação com a comunidade), também está presente neste documento, evento esse que teve como seu principal objetivo demonstrar o “Processo de estágio Benfica Lab/ FMH – Observação e Análise de Jogo”.

A Hydrogeologic Evaluation of the Waterloo Area in the Upper Jefferson River Valley, Montana

The Upper Jefferson River is one of the most dewatered rivers in Montana. The river exists in an intermontane basin filled with sediment transported from the Highland Mountains to the west, the Tobacco Root Mountains to the east, and the Jefferson River from the south. The Upper Jefferson River Valley is highly dependent on the Jefferson River as the main industry in the valley is agriculture. A majority of the valley is irrigated and used to grow crops, and a good portion is also used for cattle grazing. The residents of the Upper Jefferson River Valley use the aquifer as the main source of potable water. The Jefferson River is also widely used for recreation. This study took place in the Waterloo area of the Upper Jefferson River Valley, approximately 20 miles south of Whitehall, Montana. The Waterloo area provides significant groundwater base flow to the Jefferson River, which is particularly important during the late irrigation season when the river is severely dewatered, and elevated surface-water temperatures occur, creating irrigation water shortages and poor trout habitat. This area contains two springfed streams, Willow Springs and Parson’s Slough, which discharge to the Jefferson River providing cool water in the late season as well as providing the most important trout spawning habitat in the valley. The area is bordered on both the east and west by irrigation ditches, and about 60% of the study area is irrigated. Tile drains were installed in the study area in close proximity to Parsons Slough causing some concern by neighboring residents. This study evaluated relationships between surface water, groundwater, and irrigation practices so that water managers and others can make informed management decisions about the Upper Jefferson River. Data was collected via a network of groundwater wells and surface-water sites. Additionally, water-quality samples were taken and an aquifer test was conducted to determine aquifer properties. The field data were analyzed and a groundwater budget was created in order to evaluate the aquifer. Results of the groundwater budget show that seepage from the irrigation canals and irrigation recharge have the biggest influence on recharge of the aquifer. There is significant groundwater outflow from the aquifer in the spring-fed streams as well as discharge to the Jefferson River. In comparing previous study results to this study’s results, there is no evidence of the water table decreasing due to irrigation practice changes or tile drain installation. However, given the amount of recharge irrigation practices contribute to the aquifer, if significant changes were made, they may affect groundwater elevations. Also lining the irrigation ditches would have a significant impact on the aquifer, as the amount of seepage would be greatly reduced.