Liderazgo directivo y cambio escolar en el instituto de educación superior tecnológico público Pasco

El presente trabajo de investigación tiene como objetivo determinar la relación que existe entre el Liderazgo Directivo y Cambio Escolar en el Instituto de educación Superior Tecnológico Público Pasco. La investigación es de tipo descriptivo correlacional, con diseño no experimental transeccional correlacional y se utilizó la metodología de carácter cuantitativo. La población estuvo conformada por 40 docentes del instituto de educación superior tecnológico público Pasco. La técnica de recolección de datos empleado fue la encuesta, y se elaboraron dos instrumentos de recolección de datos los cuales fueron: los instrumentos utilizados fueron el cuestionario para medir el Liderazgo Directivo y Cambio Escolar. Los resultados obtenidos en la investigación han determinado que existe una relación altamente significativa directa entre el cambio directivo y el cambio escolar; ya que se ha obtenido un coeficiente de correlación de Rho Spearman de 0,544** (Tabla 15) lo cual indica que, a un nivel altamente significativo de liderazgo directivo, le corresponde un nivel altamente significativo de cambio escolar. Las conclusiones se interpretan en términos aplicados para seguir fortaleciendo el liderazgo directivo y el cambio escolar, coincidiendo con estudios anteriores y fundamentos teóricos

Visual impairment from cataract and health related quality of life: results from a case-control study in the Philippines.

PURPOSE: To evaluate a vision related quality of life (VRQoL) scale, the World Health Organization Prevention of Blindness and Deafness Visual Function-20 (WHO/ PBD VF20) and describe the relationship between visual impairment from cataract and vision related and generic Health Related Quality of Life (HRQoL) in a case-control study of adults aged > or = 50 years in the Philippines. METHODS: Two hundred and thirty eight population based persons visually impaired from cataract and 163 age- gender- matched controls with normal vision were interviewed using the WHO/PBD VF20 and European Quality of Life (EuroQol) questionnaire (an HRQoL). The WHO/PBD VF20 was evaluated using standard psychometric tests. RESULTS: The WHO/PBD VF20 had good item acceptability and validity. Cases had significantly poorer VRQoL than controls and worsening Visual Acuity (VA) was associated with worsening VRQoL. The general functioning subscale had good internal consistency. The psychosocial sub-scale had a Cronbach's alpha of 0.61, just below the generally accepted criteria of 0.70. Cases were much more likely than controls to report problems with the Euroqol five descriptive domains (EQ-5D)and had significantly poorer self-rated health. CONCLUSIONS: The study supports the use of the WHO/PBD VF20 in a Philippine population and highlights the worsening VRQoL associated with cataract vision loss. The poorer generic HRQoL among cases compared to controls indicates an impact of visual impairment on perceived health and well-being, beyond vision-specific experience

Ubiquity of dominant cyanobacterial taxa along glacier retreat in the Antarctic Peninsula

Cyanobacteria are key organisms in the Antarctic ecosystem, but the primary succession of its communities in recently deglaciated soils remains poorly understood. In this study, we surveyed the primary succession of cyanobacterial communities with an in-depth Next Generation Sequencing approach in three Antarctic recently glacier forefields. Despite the similar physicochemical characteristics of the soils, we did not find a common pattern in the distribution of the cyanobacterial communities at the finest level of taxonomic resolution. However, the metabarcoding analysis revealed a common community of 14 cyanobacterial identical sequences in all the studied soils, whose lineages were not restricted to polar or alpine biotopes. These ASVs comprised a relative abundance within the cyanobacterial community of 51.5%-81.7% among the three locations and were also found in two cyanobacterial mats from the Antarctic Peninsula. Our results suggest that (micro)biotic interactions act as a key driver of the community composition and dynamics of Cyanobacteria during the early stages of succession in recently deglaciated soils of Antarctica. A few common genera might play a key role in the ecosystem, due to its ubiquitous presence not only in these soils but also in microbial mats, conforming probably the most widely disperse and dominant single genotypes in Antarctic soilsThis work was supported by the Spanish Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER), Grants PID2020-116520RB-I00, CTM2016-79741-R and PCIN-2016001. PA was supported by a FPI-contract fellowship (BES-2017080558) from MINEC

The long term impact of cataract surgery on quality of life, activities and poverty: results from a six year longitudinal study in Bangladesh and the Philippines.

BACKGROUND: Cataract surgery has been shown to improve quality of life and household economy in the short term. However, it is unclear whether these benefits are sustained over time. This study aims to assess the six year impact of cataract surgery on health related quality of life (HRQoL), daily activities and economic poverty in Bangladesh and The Philippines. METHODS AND FINDINGS: This was a longitudinal study. At baseline people aged ≥50 years with visual impairment due to cataract ('cases') and age-, sex-matched controls without visual impairment were interviewed about vision specific and generic HRQoL, daily activities and economic indicators (household per capita expenditure, assets and self-rated wealth). Cases were offered free or subsidised cataract surgery. Cases and controls were re-interviewed approximately one and six years later. At baseline across the two countries there were 455 cases and 443 controls. Fifty percent of cases attended for surgery. Response rates at six years were 47% for operated cases and 53% for controls. At baseline cases had poorer health and vision related QoL, were less likely to undertake productive activities, more likely to receive assistance with activities and were poorer compared to controls (p<0.05). One year after surgery there were significant increases in HRQoL, participation and time spent in productive activities and per capita expenditure and reduction in assistance with activities so that the operated cases were similar to controls. These increases were still evident after six years with the exception that time spent on productive activities decreased among both cases and controls. CONCLUSION: Cataract causing visual loss is associated with reduced HRQoL and economic poverty among older adults in low-income countries. Cataract surgery improves the HRQoL of the individual and economy of the household. The findings of this study suggest these benefits are sustained in the long term

Computational modeling and fluorescence microscopy characterization of a two-phase magnetophoretic microsystem for continuous-flow blood detoxification

Magnetic beads can be functionalized to capture and separate target pathogens from blood for extracorporeal detoxification. The beads can be magnetically separated from a blood stream and collected into a coflowing buffer solution using a two-phase liquid-liquid continuous-flow microfluidic device in the presence of an external field. However, device design and process optimization, i.e. high bead recovery with minimum blood loss or dilution remain a substantial technological challenge. We introduce a CFD-based Eulerian-Lagrangian computational model that enables the rational design and optimization of such systems. The model takes into account dominant magnetic and hydrodynamic forces on the beads as well as coupled bead-fluid interactions. Fluid flow (Navier-Stokes equations) and mass transfer (Fick's law) between the coflowing fluids are solved numerically, while the magnetic force on the beads is predicted using analytical methods. The model is demonstrated via application to a prototype device and used to predict key performance metrics; degree of bead separation, flow patterns, and mass transfer, i.e. blood diffusion to the buffer phase. The impact of different process variables and parameters-flow rates, bead and magnet dimensions and fluid viscosities-on both bead recovery and blood loss or dilution is quantified for the first time. The performance of the prototype device is characterized using fluorescence microscopy and the experimental results are found to match theoretical predictions within an absolute error of 15%. While the model is demonstrated here for analysis of a detoxification device, it can be readily adapted to a broad range of magnetically-enabled microfluidic applications, e.g. bioseparation, sorting and sensing

E-learning, un nuevo futuro para la formación

Es evidente que el avance de las Nuevas Tecnologías de la Información y, fundamentalmente, de la red Internet, ha facilitado la aparición de nuevas alternativas en distintos campos como el comercio, el trabajo, la enseñanza y las relaciones sociales. El comercio electrónico, las redes corporativas y el teletrabajo son algunas de las aplicaciones surgidas en los últimos años. Uno de los ámbitos en los que más expectativas se están creando es en el de la formación al poder salvar muchas de las limitaciones de hace unos años, al facilitar el uso de las redes la utilización, distribución y acceso remoto a materiales en formato digital y, además, hacer posible eliminar las barreras de espacio-tiempo. El presente artículo presenta un resumen de las conclusiones elaboradas por los autores en su Proyecto Final del Máster en Dirección y Gestión de Recursos Humanos que todos ellos realizaron en el Centro de Estudios Financieros

Comunidades de macroinvertebrados bentónicos y evaluación de la calidad del agua en humedales altoandinos de Callali-Oscollo, Arequipa-Cusco, Perú

High Andean wetlands are fragile systems, vulnerable to human activity and climate change. In the Arequipa region (Peru), there are high Andean lotic and lentic systems currently affected by livestock raising, fish farming, and dams. The aim of the study was to evaluate the aquatic invertebrate community in the Callalli-Oscollo wetlands and the possible impact of human activities. Samples were taken from November 2017 to October 2018 at four sampling stations in lotic environments and two in lentic environments. Macroinvertebrates were identified to the family level. The following were determined to evaluate community structure: richness, relative abundance, Shannon-Wiener diversity, Simpson dominance, Pielou evenness, and true diversity. The indices ABI, BMWP/Bol and nPeBMWP were applied to evaluate the ecological quality of the environments sampled. Thirty families were recorded in lotic environments, the most abundant being Chironomidae, Naididae, Limnesiidae, Elmidae, Baetidae and Lumbriculidae. The ecological quality was good, except at the station associated to the dam, where it was doubtful. Twenty-six families were recorded in lentic environments, the most abundant being Cyprididae, Naididae and Corixidae. The macroinvertebrate communities in high Andean environments reflect ecosystem conditions. Environments associated to human activity have lower ecological quality.Los humedales altoandinos son sistemas frágiles, vulnerables a la actividad humana y al cambio climático. La región de Arequipa (Perú) posee ecosistemas lóticos y lénticos altoandinos con impactos por la ganadería, piscicultura y represamiento. Se evaluó la comunidad de macroinvertebrados acuáticos de los humedales de Callalli-Oscollo y el posible efecto de las actividades humanas. Desde noviembre de 2017 a octubre de 2018 se realizaron muestreos en 4 estaciones en ambientes lóticos y 2 en lénticos. Los macroinvertebrados se identificaron a nivel de familia. Para evaluar la estructura comunitaria se registró la riqueza, la abundancia relativa, la diversidad de Shannon-Wiener, la dominancia de Simpson, la equidad de Pielou y la diversidad verdadera. Se aplicaron los índices ABI, BMWP/Bol y nPeBMWP para evaluar la calidad ecológica de los ambientes lóticos. En éstos se registraron 30 familias, siendo las más abundantes Chironomidae, Naididae, Limnesiidae, Elmidae, Baetidae y Lumbriculidae. La calidad ecológica fue buena, con excepción de la estación vinculada a la presa que fue dudosa. Los ambientes lénticos registraron 26 familias, siendo las más abundantes Cyprididae, Naididae y Corixidae. Las comunidades de macroinvertebrados en ambientes altoandinos reflejan el estado del ecosistema. Los ambientes vinculados con la actividad humana registran menor calidad ecológica.Fil: Coayla Peñaloza, Pastor. Universidad Nacional de San Agustin; PerúFil: Cheneaux Díaz, André Alexander. Universidad Nacional de San Agustin; PerúFil: Moreno Salazar, Claudia Viviana. Universidad Nacional de San Agustin; PerúFil: Cruz Remache, Cynthia Elizabeth. Universidad Nacional de San Agustin; PerúFil: Colque Rondón, Eusebio Walter. Universidad Nacional de San Agustin; PerúFil: Damborenea, Maria Cristina. Universidad Nacional de la Plata. Facultad de Cs.naturales y Museo. Cátedra de Zoología de Invertebrados I; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

The CONVERTE project: biomass potential for energy

ABSTRACT: Climate change caused by the excessive use of non-renewable resources as a means of supporting the current society demands is forcing the development of circular economy models and social, economic and environmental balanced solutions. In Portugal, in recent decades, important progresses have been made on waste resources management practices in line with the objectives and directives of the European Union. The urban and industrial wastes are, to a certain extent, a case of success since the effort developed has created tools for the prevention, control, recovery and recycling of a considerable percentage of the generated amounts. However, this effort has not yet reached its full potential, and there are still diverse underexplored issues, such as a systematic assessment of the waste biomass suitability for specific energy conversion technologies, and the promotion of non-food-competing energy crops on marginal lands. CONVERTE will identify and quantify the different waste biomass types generated in the Portuguese continental territory, and shall develop a biomass-driven energy matrix that correlates the biomass types with eight technological value chains for heat, power and/or advanced biofuels as main products. This is expected to impact positively on the national energy security and to reduce the overall Portuguese greenhouse gas (GHG) emissions, namely in the transport sector, contributing to increase the country sustainability score.info:eu-repo/semantics/publishedVersio

A Comparison of Photoelastic and Finite Elements Analysis in Internal Connection and Bone Level Dental Implants

This study is a contribution to our understanding of the mechanical behaviour of dental implants through the use of the finite element and the photoelastic methods. Two internal connection and bone level dental implants with different design have been analysed (M-12 by Oxtein S.L., Zaragoza, Spain, and ASTRA, from Dentsply Sirona, Charlotte, NC, USA), evaluating the stress distribution produced by axial stresses and a comparison has been established between them, as well as between the two methods used, in order to validate the adopted hypotheses and correlate the numerical modelling performed with experimental tests. To load the implant in laboratory testing, a column was placed, such that the loading point was about 9.3 mm from the upper free surface of the resin plate. This column connects the implant with the weights used to define the test load. In turn, support for both plates was achieved by two 6 mm bolts 130 mm apart and located on a parallel line with the resin (flush with the maximum level of the implant), at a depth of 90 mm. The results obtained with both methods used were similar enough. The comparison of results is fundamentally visual, but ensures that, at least in the range of forces used, both methods are similar. Therefore, the photoelastic method can be used to confirm in a real way the virtual conditions of the finite element models, with the implications in the investigation of dental implants that this entails

A Case-Control Study to Assess the Relationship between Poverty and Visual Impairment from Cataract in Kenya, the Philippines, and Bangladesh

Hannah Kuper and colleagues report a population-based case-control study conducted in three countries that found an association between poverty and visual impairment from cataract