BACKGROUND: During the 1990s, global eating habits changed, affecting poorer and middle-income nations, as well as richer countries. This shift, known as the "obesity transition," led to more people becoming overweight or obese worldwide. In Ecuador, this change is happening, and now, one in three children is affected by overweight or obesity (OW/OB). This study explores the links between social, economic, and demographic factors and childhood obesity in Ecuador, seeking to provide insights for shaping future health policies in response to this intricate shift. METHODS: A cross-sectional study using 2018 National Health and Nutrition Survey data from Ecuador. Weighted percentages were computed, and odds ratios for OW/OB unadjusted and adjusted for each category of explanatory variables were estimated using multilevel multivariate logistic regression models. RESULTS: Among 10,807 Ecuadorian school children aged 5 to 11, the prevalence of OW/OB was 36.0%. Males exhibited 1.26 times higher odds than females (95% CI: 1.20 to 1.33), and each additional year of age increased the odds by 1.10 times (95% CI: 1.09 to 1.10). Economic quintiles indicated increased odds (1.17 to 1.39) from the 2nd to 5th quintile (the richest) compared with the first quintile (the poorest). Larger household size slightly reduced odds of OW/OB (adjusted odds ratio [aOR] = 0.93, 95% CI: 0.91 to 0.95), while regular physical activity decreased odds ([aOR] = 0.79, 95% CI: 0.75 to 0.82). The consumption of school-provided meals showed a non-significant reduction (aOR: 0.93, 95% CI: 0.82 to 1.06). Children from families recognizing and using processed food labels had a higher likelihood of being overweight or obese (aOR = 1.14, 95% CI: 1.02 to 1.26). CONCLUSION: Age, male gender, and higher economic quintile increase OW/OB in Ecuadorian school children. Larger households and physical activity slightly decrease risks. Ecuador needs policies for healthy schools and homes, focusing on health, protection, and good eating habits.
Overweight , Pediatric Obesity , Female , Humans , Male , Child , Overweight/epidemiology , Ecuador/epidemiology , Pediatric Obesity/epidemiology , Cross-Sectional Studies , Health Surveys , Prevalence
In this paper, the experimentally observed significant increase in yield stress for strain rates beyond 104 s-1 (viscous regime) is explicitly considered in laser shock processing (LSP) simulations. First, a detailed review of the most common high-strain-rate deformation models is presented, highlighting the expected strain rates in materials subject to LSP for a wide range of treatment conditions. Second, the abrupt yield stress increase presented beyond 104 s-1 is explicitly considered in the material model of a titanium alloy subject to LSP. A combined numerical-analytical approach is used to predict the time evolution of the plastic strain. Finally, extended areas are irradiated covering a squared area of 25 × 25 mm2 for numerical-experimental validation. The in-depth experimental residual stress profiles are obtained by means of the hole drilling method. Near-surface-temperature gradients are explicitly considered in simulations. In summary, the conventionally accepted strain rate range in LSP (106-107 s-1) is challenged in this paper. Results show that the conventional high-strain-rate hardening models widely used in LSP simulations (i.e., Johnson Cook model) clearly overestimate the induced compressive residual stresses. Additionally, pressure decay, whose importance is usually neglected, has been found to play a significant role in the total plastic strain achieved by LSP treatments.
Objectives: To describe the perspectives of health practitioners on the barriers, gaps, and opportunities that Venezuelan migrant women experienced to accessing sexual and reproductive health (SRH) services during the COVID-19 pandemic and how SRH services were affected in Quito, Ecuador. Methods: Health practitioners involved in SRH services at nine public health care facilities in three zones of Quito were surveyed. The Minimum Initial Service Package readiness assessment tool survey, available from the Inter-Agency Working Group on Reproductive Health in Crisis, was adapted for use and data collection in Ecuador. Results: Of 297 respondents, 227 were included in the analysis. Only 16% of the health practitioners agreed that discrimination against migrant Venezuelans women occurred in the health care system. Of those, only 2.3% described specific conditions associated with discrimination, including requiring identification documents (7.5%) and lack of empathy or responsiveness (6.6%). Most (65.2%) respondents reported that the COVID-19 pandemic affected the use of SRH services by women in the general population and by Venezuelan migrant women more so (56.3%) because of more limited access to SRH services, poverty, and vulnerability. There were no differences between perceptions by levels of health care facility, except with regard to the lack of supplies, awareness of discrimination, and the belief that Venezuelan migrant women were affected more negatively than the local population. Conclusion: The perception among health practitioners in Quito was that discrimination occurred infrequently during the COVID-19 pandemic despite affecting the health care system. However, some level of discrimination toward migrant Venezuelan migrant women seeking SRH services was acknowledged and may be underrepresented.
[ABSTRACT]. Objectives. To describe the perspectives of health practitioners on the barriers, gaps, and opportunities that Venezuelan migrant women experienced to accessing sexual and reproductive health (SRH) services during the COVID-19 pandemic and how SRH services were affected in Quito, Ecuador. Methods. Health practitioners involved in SRH services at nine public health care facilities in three zones of Quito were surveyed. The Minimum Initial Service Package readiness assessment tool survey, available from the Inter-Agency Working Group on Reproductive Health in Crisis, was adapted for use and data collection in Ecuador. Results. Of 297 respondents, 227 were included in the analysis. Only 16% of the health practitioners agreed that discrimination against migrant Venezuelans women occurred in the health care system. Of those, only 2.3% described specific conditions associated with discrimination, including requiring identification docu- ments (7.5%) and lack of empathy or responsiveness (6.6%). Most (65.2%) respondents reported that the COVID-19 pandemic affected the use of SRH services by women in the general population and by Venezuelan migrant women more so (56.3%) because of more limited access to SRH services, poverty, and vulnerability. There were no differences between perceptions by levels of health care facility, except with regard to the lack of supplies, awareness of discrimination, and the belief that Venezuelan migrant women were affected more negatively than the local population. Conclusion. The perception among health practitioners in Quito was that discrimination occurred infrequently during the COVID-19 pandemic despite affecting the health care system. However, some level of discrim- ination toward migrant Venezuelan migrant women seeking SRH services was acknowledged and may be underrepresented.
[RESUMEN]. Objetivos. Describir las perspectivas de los prestadores de atención de salud sobre los obstáculos, las brechas y las oportunidades que registraron las mujeres migrantes venezolanas para acceder a los servicios de salud sexual y reproductiva (SSR) durante la pandemia de COVID-19 y cómo se vieron afectados estos servicios en Quito (Ecuador). Métodos. Se encuestó a prestadores de atención de salud que trabajan en servicios de SSR en nueve centros de salud pública de tres zonas de Quito. Se utilizó una adaptación de la encuesta sobre el instrumento de evalu- ación de la disposición operativa del paquete de servicios iniciales mínimos, disponible en el Grupo de Trabajo Interinstitucional sobre Salud Reproductiva en Situaciones de Crisis, para la recopilación de datos en Ecuador. Resultados. De las 297 personas encuestadas, 227 quedaron incluidas en el análisis. Solo el 16% de los prestadores de atención de salud estaba de acuerdo en que en el sistema de salud había discriminación con- tra las mujeres migrantes venezolanas. De estos, solo el 2,3% describió circunstancias específicas asociadas a la discriminación, como la exigencia de documentos de identidad (7,5%) y la falta de empatía o capacidad de respuesta (6,6%). La mayoría (65,2%) de las personas encuestadas manifestó que la pandemia de COVID- 19 había impactado en el uso de los servicios de SSR por parte de las mujeres de la población general y, en mayor medida, por parte de las mujeres migrantes venezolanas (56,3%) debido a sus limitaciones para acceder a los servicios de SSR, su pobreza y su vulnerabilidad. No hubo diferencias en las percepciones según el nivel de los centros de salud, excepto con respecto a la falta de insumos, la concientización sobre la discriminación y la creencia de que estas mujeres se vieron más afectadas que la población local. Conclusión. La percepción en los prestadores de atención de salud en Quito fue que, pese a ser un fenómeno que afectaba al sistema de atención de salud, la discriminación había sido poco frecuente durante la pan- demia de COVID-19. Sin embargo, se reconoció cierto nivel de discriminación hacia las mujeres migrantes venezolanas que solicitaban servicios de SSR y que este fenómeno podría estar subrepresentado.
[RESUMO]. Objetivos. Descrever as perspectivas dos profissionais de saúde sobre as barreiras, lacunas e oportunidades que as mulheres migrantes venezuelanas encontraram para acessar serviços de saúde sexual e reprodutiva (SSR) durante a pandemia de COVID-19 e como esses serviços foram afetados em Quito, Equador. Métodos. Foram entrevistados profissionais de saúde envolvidos nos serviços de SSR de nove unidades públicas de saúde de três zonas de Quito. Adaptou-se o questionário de avaliação da prontidão para oferecer o pacote de serviço inicial mínimo, disponibilizado pelo grupo de trabalho interagencial sobre saúde reprodu- tiva em situações de crise, a fim de realizar a coleta de dados no Equador. Resultados. Dos 297 respondentes, 227 foram incluídos na análise. Apenas 16% dos profissionais de saúde concordaram que havia discriminação contra mulheres migrantes venezuelanas no sistema de saúde. Desses, apenas 2,3% descreveram condições específicas associadas à discriminação, como cobrança de documen- tos de identificação (7,5%) e falta de empatia ou responsividade (6,6%). A maioria (65,2%) dos respondentes relatou que a pandemia de COVID-19 afetou o uso dos serviços de SSR por mulheres na população de modo geral. As mulheres migrantes venezuelanas foram mais afetadas (56,3%) devido ao acesso limitado a serviços de SSR e à pobreza e vulnerabilidade. Não houve diferenças de percepção entre diferentes níveis de atenção à saúde, exceto no que diz respeito à falta de insumos, sensibilização para a discriminação e crença de que as mulheres migrantes venezuelanas foram afetadas de forma mais negativa que a população local. Conclusão. Para os profissionais de saúde em Quito, a discriminação foi pouco frequente durante a pandemia de COVID-19, embora a pandemia tenha afetado o sistema de saúde. Entretanto, os profissionais reconhece- ram certo nível de discriminação contra as mulheres migrantes venezuelanas que procuram serviços de SSR, que pode estar sub-representado.
Transients and Migrants , Sexual Health , Reproductive Health , Health Services Accessibility , Social Discrimination , Venezuela , Transients and Migrants , Sexual Health , Reproductive Health , Health Services Accessibility , Social Discrimination , Sexual Health , Reproductive Health , Health Services Accessibility , Social Discrimination
ABSTRACT Objectives. To describe the perspectives of health practitioners on the barriers, gaps, and opportunities that Venezuelan migrant women experienced to accessing sexual and reproductive health (SRH) services during the COVID-19 pandemic and how SRH services were affected in Quito, Ecuador. Methods. Health practitioners involved in SRH services at nine public health care facilities in three zones of Quito were surveyed. The Minimum Initial Service Package readiness assessment tool survey, available from the Inter-Agency Working Group on Reproductive Health in Crisis, was adapted for use and data collection in Ecuador. Results. Of 297 respondents, 227 were included in the analysis. Only 16% of the health practitioners agreed that discrimination against migrant Venezuelans women occurred in the health care system. Of those, only 2.3% described specific conditions associated with discrimination, including requiring identification documents (7.5%) and lack of empathy or responsiveness (6.6%). Most (65.2%) respondents reported that the COVID-19 pandemic affected the use of SRH services by women in the general population and by Venezuelan migrant women more so (56.3%) because of more limited access to SRH services, poverty, and vulnerability. There were no differences between perceptions by levels of health care facility, except with regard to the lack of supplies, awareness of discrimination, and the belief that Venezuelan migrant women were affected more negatively than the local population. Conclusion. The perception among health practitioners in Quito was that discrimination occurred infrequently during the COVID-19 pandemic despite affecting the health care system. However, some level of discrimination toward migrant Venezuelan migrant women seeking SRH services was acknowledged and may be underrepresented.
RESUMEN Objetivos. Describir las perspectivas de los prestadores de atención de salud sobre los obstáculos, las brechas y las oportunidades que registraron las mujeres migrantes venezolanas para acceder a los servicios de salud sexual y reproductiva (SSR) durante la pandemia de COVID-19 y cómo se vieron afectados estos servicios en Quito (Ecuador). Métodos. Se encuestó a prestadores de atención de salud que trabajan en servicios de SSR en nueve centros de salud pública de tres zonas de Quito. Se utilizó una adaptación de la encuesta sobre el instrumento de evaluación de la disposición operativa del paquete de servicios iniciales mínimos, disponible en el Grupo de Trabajo Interinstitucional sobre Salud Reproductiva en Situaciones de Crisis, para la recopilación de datos en Ecuador. Resultados. De las 297 personas encuestadas, 227 quedaron incluidas en el análisis. Solo el 16% de los prestadores de atención de salud estaba de acuerdo en que en el sistema de salud había discriminación contra las mujeres migrantes venezolanas. De estos, solo el 2,3% describió circunstancias específicas asociadas a la discriminación, como la exigencia de documentos de identidad (7,5%) y la falta de empatía o capacidad de respuesta (6,6%). La mayoría (65,2%) de las personas encuestadas manifestó que la pandemia de COVID-19 había impactado en el uso de los servicios de SSR por parte de las mujeres de la población general y, en mayor medida, por parte de las mujeres migrantes venezolanas (56,3%) debido a sus limitaciones para acceder a los servicios de SSR, su pobreza y su vulnerabilidad. No hubo diferencias en las percepciones según el nivel de los centros de salud, excepto con respecto a la falta de insumos, la concientización sobre la discriminación y la creencia de que estas mujeres se vieron más afectadas que la población local. Conclusión. La percepción en los prestadores de atención de salud en Quito fue que, pese a ser un fenómeno que afectaba al sistema de atención de salud, la discriminación había sido poco frecuente durante la pandemia de COVID-19. Sin embargo, se reconoció cierto nivel de discriminación hacia las mujeres migrantes venezolanas que solicitaban servicios de SSR y que este fenómeno podría estar subrepresentado.
RESUMO Objetivos. Descrever as perspectivas dos profissionais de saúde sobre as barreiras, lacunas e oportunidades que as mulheres migrantes venezuelanas encontraram para acessar serviços de saúde sexual e reprodutiva (SSR) durante a pandemia de COVID-19 e como esses serviços foram afetados em Quito, Equador. Métodos. Foram entrevistados profissionais de saúde envolvidos nos serviços de SSR de nove unidades públicas de saúde de três zonas de Quito. Adaptou-se o questionário de avaliação da prontidão para oferecer o pacote de serviço inicial mínimo, disponibilizado pelo grupo de trabalho interagencial sobre saúde reprodutiva em situações de crise, a fim de realizar a coleta de dados no Equador. Resultados. Dos 297 respondentes, 227 foram incluídos na análise. Apenas 16% dos profissionais de saúde concordaram que havia discriminação contra mulheres migrantes venezuelanas no sistema de saúde. Desses, apenas 2,3% descreveram condições específicas associadas à discriminação, como cobrança de documentos de identificação (7,5%) e falta de empatia ou responsividade (6,6%). A maioria (65,2%) dos respondentes relatou que a pandemia de COVID-19 afetou o uso dos serviços de SSR por mulheres na população de modo geral. As mulheres migrantes venezuelanas foram mais afetadas (56,3%) devido ao acesso limitado a serviços de SSR e à pobreza e vulnerabilidade. Não houve diferenças de percepção entre diferentes níveis de atenção à saúde, exceto no que diz respeito à falta de insumos, sensibilização para a discriminação e crença de que as mulheres migrantes venezuelanas foram afetadas de forma mais negativa que a população local. Conclusão. Para os profissionais de saúde em Quito, a discriminação foi pouco frequente durante a pandemia de COVID-19, embora a pandemia tenha afetado o sistema de saúde. Entretanto, os profissionais reconheceram certo nível de discriminação contra as mulheres migrantes venezuelanas que procuram serviços de SSR, que pode estar sub-representado.
Laser surface texturing (LST) is a method to obtain micro-structures on the material's surface for improving tribological performances, wetting tuning, surface treatment, and increasing adhesion. The material selected for LST is AISI 430 ferritic stainless steel, distinguished by the low cost in manufacturing, corrosion resistance, and high strength at elevated temperature. The present study addresses the morphology of new pattern designs (crater array, ellipse, and octagonal shapes). The patterns are applied on the stainless-steel surface by a non-contact method with high quality and precision nanosecond pulsed laser equipment. The investigation of laser parameter influence on thermal affected area and micro-structures is accomplished by morphological and elemental analysis (SEM + EDX). The parameters of the laser micro-patterning have a marked influence on the morphology, creating groove-type sections with different depths and recast material features. From the SEM characterization, the highest level of recast material is observed for concentric octagon LST design. Its application is more recommended for the preparation of the metal surface before hybrid welding. Additionally, the lack of the oxygen element in the case of this design suggests the possible use of the pattern in hybrid joining.
Due to its wide applicability in industry, devising microstructures on the surface of materials can be easily implemented and automated in technological processes. Laser Surface Texturing (LST) is applied to modify the chemical composition, morphology, and roughness of surfaces (wettability), cleaning (remove contaminants), reducing internal stresses of metals (hardening, tempering), surface energy (polymers, metals), increasing the adhesion (hybrid joining, bioengineering) and decreasing the growth of pathogenic bacteria (bioengineering). This paper is a continuation and extension of our previous studies in laser-assisted texturing of surfaces. Three different patterns (crater array-type C, two ellipses at 90° overlapping with its mirror-type B and 3 concentric octagons-type A) were applied with a nanosecond pulsed laser (active medium Nd: Fiber Diode-pumped) on the surface of a ferritic stainless steel (AISI 430). Micro texturing the surface of a material can modify its wettability behavior. A hydrophobic surface (contact angle greater than 90°) was obtained with different variations depending on the parameters. The analysis performed in this research (surface roughness, wettability) is critical for assessing the surface functionality, characteristics and properties of the stainless steel surface after the LST process. The values of the surface roughness and the contact angle are directly proportional to the number of repetitions and inversely proportional to the speed. Recommendations for the use of different texturing pattern designs are also made.
The effect of process parameters and the orientation of the cladding layer on the mechanical properties of 316L stainless steel components manufactured by laser metal deposition (LMD) was investigated. High aspect-ratio walls were manufactured with layers of a 4.5 mm wide single-cladding track to study the microstructure and mechanical properties along the length and the height of the wall. Samples for the tensile test (according to ASTM E-8M-04) were machined from the wall along both the direction of the layers and the direction perpendicular to them. Cross-sections of the LMD samples were analyzed by optical and scanning electron microscopy (SEM). The orientation of the growing grain was observed. It was associated with the thermal gradient through the building part. A homogeneous microstructure between consecutive layers and some degree of microporosity was observed by SEM. Uniaxial tension tests were performed on samples extracted from the wall in perpendicular and parallel directions. Results for ultimate tensile strength were similar in both cases and with the wrought material. The σ0.2 were similar in both cases but slightly superior to the wrought material.
Learning how to program in Primary Education has attracted significant research in recent years. It is unclear though how programming environments and languages should be adapted to children to achieve better learning and use, but one trend seems to be the use of Scratch. The question in this paper is what programming environment can be used to continue teaching programming to children who have already been taught Scratch for years. This paper's proposal is that students aged between 10 and 12 can benefit from interacting with a friendly learning companion using p-code such as Alcody. The hypothesis is that students (aged between 10 and 12) with a knowledge of Scratch will be able to significantly improve their scores by using a learning companion to teach them how to program even during the COVID-19 pandemic. To check the hypothesis, an experiment was carried out during the 2019/2020 academic year with 137 students in Ecuador. A significant improvement in the scores of the students was recorded together with high satisfaction.
Objetivo: Comparar dos series de pacientes sometidos a ligamentoplastia con tendones isquiotibiales autólogos mediante las dos técnicas quirúrgicas preferentes: monotúnel transtibial y bitúnel anatómica, utilizando idénticas fijaciones óseas, y establecer conclusiones funcionales. Materiales y Métodos: Estudio retrospectivo de dos series de 30 pacientes, con un seguimiento superior a un año, sometidos a ligamentoplastia del ligamento cruzado anterior con tendones isquiotibiales mediante técnicas monotúnel transtibial y bitúnel con tunelización retrógrada, utilizando fijación elástica cortical en fémur y fijación tibial mediante tornillo retrógrado. Se los evaluó con la escala del IKDC, y las pruebas de Lachman, de resalte (pivot-shift) y del salto monopodal, valorando la reincorporación a la actividad previa habitual y deportiva, y examen radiológico de la evolución de los túneles óseos. Resultados: La técnica bitúnel anatómica logra resultados significativamente mejores (p <0,05) en la evaluación subjetiva de la escala del IKDC, en las pruebas de resalte, del salto y en la recuperación de la actividad deportiva previa a la lesión, sin diferencias en la prueba de Lachman. No hubo casos de osteólisis en los túneles óseos, en ninguna de las dos series. Conclusiones: La técnica de ligamentoplastia bitúnel anatómica es mejor valorada y más eficaz que la técnica monotúnel transtibial, fundamentalmente en pacientes con actividad deportiva exigente, ya que en aquellos sin actividades de impacto, los resultados son satisfactorios de igual forma. Con el atornillado retrógrado tibial no hubo osteólisis significativa en el túnel tibial. Nivel de Evidencia: III
Objective: To compare two series of patients who underwent anterior cruciate ligament reconstruction using hamstring tendon autografts, identical bone fixations, and one of the two standard surgical approaches: transtibial single-tunnel and anatomical double-tunnel technique. To draw conclusions regarding functional outcomes. Materials and Methods: This was a retrospective study consisting in two series of 30 patients, followed up for more than a year, who had undergone an anterior cruciate ligament reconstruction with hamstring tendon graft placement using the transtibial single-tunnel or the anatomical double-tunnel technique. The latter employed retrograde tunneling, as well as an adjustable cortical fixation for the femur and a retrograde screw fixation for the tibia. Patients were assessed using the International Knee Documentation Committee (IKDC) Questionnaire, the Lachman Test, the Lateral Pivot-Shift Test and the Single Leg Hop Test with the aim of determining if they were ready to return to their previous daily and sports activities. Radiological examination of the bone tunnels was also performed to assess progress. Results: The anatomical double-tunnel technique yields significantly (p <0.05) better results on the IKDC Questionnaire, the Lateral Pivot- Shift Test and the Hop Test and allows patients to resume sports activities in a shorter time. The Lachman Test showed similar results with both techniques. There were no cases of tunnel osteolysis in either of the two series. Conclusions: The anatomical double-tunnel ligament reconstruction technique was better rated by patients and more efficient than the transtibial single-tunnel technique, especially in patients who engage in demanding sports activities. In patients who do not practice high-impact activities, results were equally satisfactory. The tibial retrograde screw fixation did not result in significant tunnel osteolysis. Level of Evidence: III
Adult , Anterior Cruciate Ligament/surgery , Orthopedic Procedures , Anterior Cruciate Ligament Reconstruction , Bone Screws , Retrospective Studies , Follow-Up Studies , Treatment Outcome
One of the main limiting factors for a widespread industrial use of the Selective Laser Melting Process it its lack of productivity, which restricts the use of this technology just for high added-value components. Typically, the thickness of the metallic powder that is used lies on the scale of micrometers. The use of a layer up to one millimeter would be necessarily associated to a dramatic increase of productivity. Nevertheless, when the layer thickness increases, the complexity of consolidation phenomena makes the process difficult to be governed. The present work proposes a 3D finite element thermo-coupled model to study the evolution from the metallic powder to the final consolidated material, analyzing specifically the movements and loads of the melt pool, and defining the behavior of some critical thermophysical properties as a function of temperature and the phase of the material. This model uses advanced numerical tools such as the Arbitrary Lagrangeanâ»Eulerian formulation and the Automatic Remeshing technique. A series of experiments have been carried out, using a high thickness powder layer, allowing for a deeper understanding of the consolidation phenomena and providing a reference to compare the results of the numerical calculations.
This paper presents a novel structural piezoresistive pressure sensor with four-grooved membrane combined with rood beam to measure low pressure. In this investigation, the design, optimization, fabrication, and measurements of the sensor are involved. By analyzing the stress distribution and deflection of sensitive elements using finite element method, a novel structure featuring high concentrated stress profile (HCSP) and locally stiffened membrane (LSM) is built. Curve fittings of the mechanical stress and deflection based on FEM simulation results are performed to establish the relationship between mechanical performance and structure dimension. A combination of FEM and curve fitting method is carried out to determine the structural dimensions. The optimized sensor chip is fabricated on a SOI wafer by traditional MEMS bulk-micromachining and anodic bonding technology. When the applied pressure is 1 psi, the sensor achieves a sensitivity of 30.9 mV/V/psi, a pressure nonlinearity of 0.21% FSS and an accuracy of 0.30%, and thereby the contradiction between sensitivity and linearity is alleviated. In terms of size, accuracy and high temperature characteristic, the proposed sensor is a proper choice for measuring pressure of less than 1 psi.
A novel structural piezoresistive pressure sensor with annularly grooved membrane combined with rood beam has been proposed for low pressure measurements based on silicon substrate. In this study, a design method, including the model design, dimensions optimization, and performance prediction of the novel structure sensor, is presented. The finite element method has been used to analyze the stress distribution of sensitive elements and the deflection of membrane. On the basis of simulation results, the relationships between structural dimension variables and mechanical performance are deduced, which make the fabrication processes more efficient. According to statistics theory, the coefficient of determination R2 and residual sum of squares are introduced to indicate whether the fitting equations and curves match well with the simulation results. After that, a series of the optimal membrane dimensions are determined. Compared with other structural sensors, the optimized sensor achieves the best overall properties as it mitigates the contradiction between sensitivity and linearity. The reasons why the proposed sensor can maximize sensitivity and minimize nonlinearity are also discussed. By localizing more strain energy in the high concentrated stress profile and creating partially stiffened membrane, the proposed sensor has achieved a high sensitivity of 34.5 (mV/V)/psi and a low nonlinearity of 0.25% FSS. Thus, the proposed structure sensor will be a proper choice for low pressure applications less than 1 psi.
Fundamento: La implantación de un modelo de calidad total requiere conocer la satisfacción laboral de los trabajadores. Pretendemos averiguar el nivel de satisfacción global y de cada uno de los trabajadores de Atención Primaria del Área 10.Métodos: Estudio descriptivo transversal realizado en el Area 10 del Insalud de Madrid, Atención Primaria. Trabajan en este Área 668 profesionales sanitarios y no sanitarios. Se utiliza el cuestionario de satisfacción Font Roja, adaptado por J. Aranaz, que mide la satisfacción laboral a través de una escala de 1 (menor grado de satisfacción) a 5 (mayor grado de satisfacción).Resultados: Respondió el cuestionario un 80 por ciento de la población. La puntuación media de la satisfacción es de 3,12 (Error Típico ET= 0,017). Las dimensiones menos valoradas han sido la tensión relacionada con el trabajo, con una media de 2,30 (ET= 0,041) y la promoción profesional con una media de 2,42 (ET= 0,038). La dimensión más valorada es la competencia profesional con una media de 4,01 (ET= 0,058).Conclusiones: Los profesionales se encuentran medianamente satisfechos en su trabajo. Comparando este estudio con el realizado en este Área en 1992, concluimos que las dimensiones tensión laboral y promoción profesional siguen siendo las peor valoradas, lo que debería de activar medidas correctoras por parte de los equipos directivos (AU)
Male , Female , Humans , Job Satisfaction , Spain , Primary Health Care , Surveys and Questionnaires , Cross-Sectional Studies
