495 research outputs found
Plan Estratégico Empresa Mocar Palmira
Trabajo Diplomado, Link Código de ÉticaEl presente proyecto es una investigación desarrollada a través de la practicidad de una empresa y de conocer todos los procesos que la componen.
Se describe teóricamente y bajo los lineamientos definidos en el curso, los aspectos que la hacen sólida y prometedora, mediante esquemas investigativos desarrollados, así como las oportunidades de mejora que puede tener, basados en el diagnostico hecho a partir de este análisis.
La matriz DOFA nos brinda una categorización de su buen rendimiento presente y a futuro, así como aspectos para tener en cuenta cuyo impacto puede llegar a ser negativo.
Los Stakerholders son esos recursos que nos van a permitir responder mejor a las necesidades del mercado, son la funcionalidad interna y externa y se utilizan como herramientas de prevención y rendimiento.This project is an investigation developed through the practice of a company and knowing all the processes that comprise it.
Theoretically, and under the guidelines defined in the course, the aspects that make the solid and promising are described, through developed research schemes, as well as the opportunities for improvement that they may have, in the diagnosis made from this analysis.
The DOFA matrix gives us a categorization of its present and future good performance, as well as aspects to take into account whose impact can be negative.
Stakerholders are those resources that will allow us to better respond to market needs, they are internal and external functionality and are used as prevention and performance tools
Shaping the waveform of entangled photons
We demonstrate experimentally the tunable control of the joint spectrum, i.e.
waveform and degree of frequency correlations, of paired photons generated in
spontaneous parametric downconversion. This control is mediated by the spatial
shape of the pump beam in a type-I noncollinear configuration. We discuss the
applicability of this technique to other sources of frequency entangled
photons, such as electromagnetically induced Raman transitions.Comment: 5 Pages, 4 Figure
Determinación de la calidad del entorno natural a través de un monitoreo ambiental comunitario de dos agroecosistemas presentes en el cantón Cayambe, provincia de Pichincha
La presente investigación propone determinar el impacto socio-ambiental que produce las
prácticas agroecológicas y convencionales a través de un monitoreo ambiental comunitario en tres
parcelas localizadas en distintas zonas del cantón Cayambe provincia de Pichincha; Ayora y Santa
Rosa de Ayora, con la finalidad de comparar los resultados que evidencian las diferencias en los
aspectos salud, económico y ambiental de ambas producciones agrícolas.
El presente estudio se realizó en colaboración de las productoras pertenecientes a la red de
productores agroecológicos BIOVIDA y dos agricultores convencionales. En cada finca objeto de
estudio se observó de forma integral los agroecosistemas. En cada finca se realizaron análisis de
agua, suelo y aire con la finalidad de ver cuál es el estado de estos aspectos y correlacionar con el
modo de producción. Adicional, se entrevistó y encuestó a los y las agricultoras para establecer su
percepción de salud estimando una muestra aleatoria.
Los resultados obtenidos de los análisis físicos, químicos y biológicos realizados a cada
una de las parcelas de la investigación arrojaron resultados similares en cada uno de los parámetros
analizados, determinando que la calidad ambiental de ambos sistemas agrícolas se encuentra en
condiciones similares para el desarrollo óptimo de los cultivos. Así mismo se pudo constatar que
la diferencia más sobresaliente de ambos modelos de producción radica en los beneficios obtenidos
a futuro en cuanto a salud percibida, socioeconómica y conservación de la fertilidad del suelo.
Las encuestas y entrevistas permitieron diferenciar los aspectos de producción, monto
económico percibido antes y durante la pandemia, así como también la percepción de salud durante
los años de trabajo que vienen realizando. Los resultados denotan un contraste muy evidente en
cada uno de los modelos de producción, principalmente en los aspectos de salud y económico. Se determinó que la exposición prolongada a los agrotóxicos acarrea problemas de salud afectando
principalmente a las mujeres ocasionando cuadros de infertilidad y abortos espontáneos. En cuanto
al aspecto económico; la diferencia de extensión de terreno, formas de producción y conservación
del suelo fueron relevantes para determinar que la agroecología se destaca de una mejor manera
en términos de sustentabilidad.This research proposes to determine the socio-environmental impact produced by
agroecological and conventional practices through community environmental monitoring in three
plots located in different areas of the Cayambe canton, Pichincha province; Ayora and Santa Rosa
de Ayora, in order to compare the results that show the differences in the health, economic and
environmental aspects of both agricultural productions.
The present study was carried out in collaboration with the producers belonging to the
BIOVIDA agroecological producers network and two conventional farmers. Agroecosystems were
comprehensively observed in each farm under study. In each farm, water, soil and air analyzes
were carried out in order to see what the state of these aspects is and correlate with the mode of
production. Additionally, farmers were interviewed and surveyed to establish their perception of
health by estimating a random sample.
The results obtained from the physical, chemical and biological analyzes carried out on
each of the research plots yielded similar results in each of the analyzed parameters, determining
that the environmental quality of both agricultural systems is in similar conditions for optimal
development. Of crops. Likewise, it was found that the most outstanding difference of both
production models lies in the benefits obtained in the future in terms of perceived health,
socioeconomic status and conservation of soil fertility.
The surveys and interviews made it possible to differentiate the production aspects, the
economic amount received before and during the pandemic, as well as the perception of health
during the years of work that they have been doing. The results show a very evident contrast in
each of the production models, mainly in the health and economic aspects. It was determined that prolonged exposure to pesticides causes health problems, mainly affecting women, causing
infertility and spontaneous abortions. Regarding the economic aspect; the difference in land area,
forms of production and soil conservation were relevant to determine that agroecology stands out
in a better way in terms of sustainability
Generación y validación de estrategias de manejo de Thrips palmi Karny, plaga polifaga, en cultivos del oriente antioqueño.
La contribución de la producción agrícola del Oriente Antioqueño es de gran importancia para el país; hay concentrados importantes núcleos de productores
minifundistas, los que generan por encima de 14.000 toneladas de fríjol en más de 10.000 hectáreas, principalmente en municipios tales como San Vicente, Marinilla, El Santuario, Rionegro, El Carmen de Viboral, Guarne; se producen también en el Oriente en cerca de 10.000 hectáreas mas de 140.000 toneladas de papa, se producen más de 2.000 toneladas de habichuela, cerca de 4.000 toneladas de pimentón, cerca de 5.000 toneladas de remolacha, en cerca de 600 hectáreas se producen 60.000 toneladas de zanahoria, lechuga, arveja, papa criolla, crucíferas, tomate chonto, arracacha, entre otros, con destino tanto a consumo domestico como para proveer a diferentes regiones del país
Spatially-Explicit Testing of a General Aboveground Carbon Density Estimation Model in aWestern Amazonian Forest Using Airborne LiDAR
Mapping aboveground carbon density in tropical forests can support CO2 emissionmonitoring and provide benefits for national resource management. Although LiDAR technology has been shown to be useful for assessing carbon density patterns, the accuracy and generality of calibrations of LiDAR-based aboveground carbon density (ACD) predictions with those obtained from field inventory techniques should be intensified in order to advance tropical forest carbon mapping. Here we present results from the application of a general ACD estimation model applied with small-footprint LiDAR data and field-based estimates of a 50-ha forest plot in Ecuador?s Yasuní National Park. Subplots used for calibration and validation of the general LiDAR equation were selected based on analysis of topographic position and spatial distribution of aboveground carbon stocks. The results showed that stratification of plot locations based on topography can improve the calibration and application of ACD estimation using airborne LiDAR (R2 = 0.94, RMSE = 5.81 Mg?C? ha?1, BIAS = 0.59). These results strongly suggest that a general LiDAR-based approach can be used for mapping aboveground carbon stocks in western lowland Amazonian forests
Rifampicin-induced thrombocytopenia
ABSTRACT: Rifampicin-induced thrombocytopenia is a rare but potentially fatal immune phenomenon. We report the case of an immunocompromised patient with disseminated tuberculosis who developed rifampicin-induced thrombocytopenia 12 hours after starting anti-tuberculous therapy without previous drug sensitization. The cause-effect relationship was confirmed when thrombocytopenia resolved with rifampicin suspension but later reappeared upon drug re-exposure.RESUMEN: La trombocitopenia inducida por rifampicina es un fenómeno de origen inmune cuya presentación es inusual pero potencialmente fatal. Se presenta el caso de un paciente inmunocomprometido y con tuberculosis diseminada quien desarrolló trombocitopenia inducida por rifampicina en las primeras 12 horas tras inicio de la terapia antituberculosa sin que mediara sensibilización previa al medicamento. Se confirmó la relación de causa-efecto al resolverse la trombocitopenia con la suspensión de la rifampicina y al reaparecer con la re-exposición al fármaco
Tratamiento quirúrgico de la miocardiopatía hipertrófica obstructiva mediante la técnica de Konno modificada
ResumenObjetivoMostrar la eficacia, seguridad y reproducibilidad de la técnica de Konno modificada en la resolución de la miocardiopatía hipertrófica obstructiva.MétodosCuatro casos de miocardiopatía hipertrófica obstructiva, con edades de 8–59 años, 3 mujeres y 1 varón, clínica de angina, disnea y presíncopes. Gradiente máximo de 65–120 mmHg. Todos presentaban movimiento sistólico anterior de la válvula mitral e insuficiencia mitral, y fueron intervenidos con técnica de Konno modificada.ResultadosTodos sobrevivieron. El gradiente preoperatorio descendió un 91%. Tres casos quedaron con insuficiencia mitral ligera, todos pasaron a grado funcional I. Única complicación: necesidad de marcapasos definitivo en un caso. Seguimiento medio de 54 meses.ConclusionesEsta técnica cambia la resección septal de Morrow por la ampliación del tracto de salida del ventrículo izquierdo. Se ha mostrado eficaz y segura, con resultados estables.AbstractBackgroundThe efficacy, safety and feasibility of the modified Konno procedure for the surgical correction of hypertrophic obstructive cardiomyopathy (HOCM) are demonstrated.MethodsFour patients underwent a modified Konno procedure. The ages ranged from 8 to 59 years. There were three females and one male. Symptoms referred to were angina, dyspnea and presyncope. The echocardiography study revealed a maximum gradient between 65–120mm Hg. Systolic anterior motion of mitral valve and mitral regurgitation was present in all cases.ResultsThere were no in-hospital deaths. The gradients decreased by 91%. Mild postoperative mitral regurgitation was present in three patients. One permanent pacemaker was implanted. Mean follow up was 54 months.ConclusionsThis procedure is an alternative to the Morrows septal myectomy for the correction of HOCM, allowing a greater enlargement of the left ventricular outflow tract. It can be performed with good early and mid-term results proving to be safe and feasible
Factores que influyen en los procesos administrativos del Centro Escolar Colonia Santa Leonor, Centro Escolar Tránsito Cienfuegos y Centro Escolar Presbítero Rafael Paz Fuentes del Municipio de Santa Ana Departamento de Santa Ana,año 2018
La presente investigación tiene como propósito el estudio de los factores que influyen en los procesos administrativos de los Centros Escolares Colonia Santa Leonor, Transito Cienfuegos y Presbítero Rafael Paz Fuentes, además, como estos afectan a la comunidad educativa en la realización de las funciones, proyectos y diferentes actividades que se deberían llevar acabo, para el desarrollo integral del estudiantad
Solution-Processed Ni-Based Nanocomposite Electrocatalysts: An Approach to Highly Efficient Electrochemical Water Splitting
In this study, we report an up-scalable and low-cost solution-processed method to in situ synthesize an earth-abundant non-stoichiometric NiOx-based electrocatalytic film for water oxidation. The catalytic activity was found to be inversely proportional to the baking temperature, which varied from 50 to 500 °C. We found the formation of a hybrid nanocomposite thin film of NiOx nanocrystals (<2 nm size) inside an acetate-based organic matrix at low temperatures (<200 °C). The defective and short-range structural order of the NiOx-based nanocomposite electrocatalysts, compatible with lattice stress, low electrical conductivity, and high density of catalytically active surface species, and higher Fe incorporation were responsible for the enhanced electrocatalytic activity. Our champion NiOx catalyst features a 358 mV overpotential at 10 mA cm–2 and more than 60 h of continuous operation without significant losses, which is a remarkable milestone for undoped NiOx electrocatalysts synthesized at nearly room temperature by a solution-processed up-scalable method.Funding for open access charge: CRUE-Universitat Jaume IThe authors acknowledge the financial support from the Ministerio de Ciencia, Innovación y Universidades of Spain through funded projects ENE2017-85087-C3-1-R, RYC-2015-18349, and TEC2017-86102-C2-1-R and Agencia Valenciana de la Innovacion (AVI) INNVAL10/18/032. The authors thank the Central Support Service for Experimental Research (SCSIE) (XRD and SEM facilities) and the Institute of Materials Science (TGA and DTA equipment) of the University of Valencia and the Central Service of Scientific Instrumentation (SCIC) at University Jaume I. The authors also thank Prof. Juan P. Martinez-Pastor for his constructive suggestions and scientific discussions
Methane mitigation potential of foliage of fodder trees mixed at two levels with a tropical grass
Enteric methane (CH4) emitted by ruminant species is known as one of the main greenhouse gases produced by the agricultural sector. The objective of this study was to assess the potential the potential for CH4 mitigation and additionally the chemical composition, in vitro gas production, dry matter degradation (DMD), digestibility and CO2 production of five tropical tree species with novel forage potential including: Spondias mombin, Acacia pennatula, Parmentiera aculeata, Brosimum alicastrum and Bursera simaruba mixed at two levels of inclusion (15 and 30%) with a tropical grass (Pennisetum purpureum). The forage samples were incubated for 48 h, and a randomized complete block design was used. Crude protein content was similar across treatments (135 ± 42 g kg−1 DM), while P. purpureum was characterized by a high content of acid detergent fiber (335.9 g kg−1 DM) and B. simaruba by a high concentration of condensed tannins (20 g kg−1 DM). Likewise, A. pennatula and P. aculeata were characterized by a high content of cyanogenic glycosides and alkaloids respectively. Treatments SM30-PP70 (30% S. mombin + 70% P. purpureum) and BA30-PP70 (30% B. alicastrum + 70% P. purpureum) resulted in superior degradability at 48h than P. purpureum, while in the AP30-PP70 (30% A. pennatula + 70% P. purpureum) was lower than the control treatment (p ≤ 0.05). At 24 and 48 h, treatments that contained P. aculeata and B. alicastrum yield higher CH4 mL g−1 DOM than P. purpureum (p ≤ 0.05). The inclusion of these forage species had no statistical effect on the reduction of CH4 emissions per unit of DM incubated or degraded at 24 and 48 h with respect to P. purpureum although reductions were observed. The use of fodders locally available is an economic and viable strategy for the mitigation of the environmental impact generated from tropical livestock systems
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