USB bus data processing system

En este trabajo se presenta el sistema de adquisición de datos para señales analógicas DiagmaD-100, que utiliza el bus USB versión 1.1 utilizando un microcontrolador MC68HC908JB8como un dispositivo dedicado a la transmisión de datos a través de un módulo USB embebido. Deesta forma, se tiene un sistema de inserción plug & play que reduce el tiempo de configuración,además implementa una interfaz de usuario que permite visualizar las señales adquiridas en eldominio del tiempo y lafrecuencia y esta orientado a aplicaciones de instrumentación electrónicaen motores de combustión interna alternativos MC1A.This work presents the data acquisition system Diagma D-lOO that uses the USB Version 1.1utilizing a microcontroller MC68HC908JB8 as a device dedicated to the transmission ofdatathrough its embedded module USB. This becomes a plug&play system that allows hot insertion,reduces the configuration time. Jt explores and takes advantage to the maximum the benefits ofthis asynchronous bus visualizing the signals in time domain andfrequency for applications inelectronic instrumentation 01 internal combustion engine

Balance of payments constraint on industrial growth in Colombia 1975-2015

En esta investigación se analiza el papel de las exportaciones e importaciones industriales en el crecimiento del sector, bajo un enfoque de crecimiento restringido por balanza de pagos, en el periodo 1975-2015. Los resultados empíricos, obtenidos a través de la técnica de corrección de errores, muestran que mientras las elasticidades ingreso de la demanda de exportaciones e importaciones industriales generan un déficit comercial, los precios tienden a contrarrestarlo; sin embargo, la balanza comercial industrial es deficitaria durante todo el periodo de análisis. Los resultados también evidencian que el sector externo industrial explica un porcentaje alto del total de las exportaciones e importaciones nacionales, aspecto paradójico y preocupante para el crecimiento agregado del país, si se considera que la participación del sector industrial en el desarrollo de la economía colombiana es cada vez menor. Se concluye que el crecimiento industrial en el país se explica por las elasticidades ingreso de la demanda de las exportaciones e importaciones y por los precios (tipo de cambio real), que el crecimiento potencial del sector es mayor al observado y que el efecto del sector industrial sobre el crecimiento del país es muy bajo.Abstract: This research analyzes the role of industrial exports and imports in the growth of the sector, under a balance ofpayments- constraint approach, in the period 1975-2015. The empirical results, obtained using the technique of correction of errors, show that while the income elasticities of demand for industrial exports and imports generate a trade deficit, prices tend to counteract it; however, the industrial trade balance is in deficit throughout the analysis period. The results also show that the external industrial sector explains a high percentage of total national exports and imports, a paradoxical and worrying aspect for the country’s aggregate growth, taking into account that the participation of the industrial sector in the growth of the Colombian economy is increasingly smaller. The final conclusion is that industrial growth in Colombia is explained by the income elasticities of demand for exports and imports and by prices (real exchange rate); similarly, the potential growth of the sector is greater than the observed, and the effect of the industrial sector on the country’s growth is very low

Estrategia pedagógica basada en simuladores para potenciar las competencias de solución de problemas de física

This document presents the results to apply a pedagogical strategy based on software simulator, this project has as objective to improve the solution competences in Physic problems. The research has a qualitative approach, it is descriptive type, the data collection was through a diagnostic test at the beginning and other one at the end. The sample was seventy students from eleven grade, they were from a Colombian institution. When was applied the pedagogical strategy with the PHET simulator, the average result was 60,97 over 100, the difference was 43,02 that was obtained at the beginning. The majority of students (45), had at the beginning a basic achievement, while in the final, test the highest frequency was obtained with a high achievement, with 45 students. The difference in data results is significant, this project showed that pedagogical strategy with digital technologies generated positive results. As conclusion the simulation about Physical phenomenons help students to be involve on a real scientific activity, and this event impacts as a positive way in their formative process.En este documento se presentan los resultados de aplicar una estrategia pedagógica basada en software de simulación, orientada a mejorar las competencias de solución de problemas de física. La investigación tiene un enfoque cuantitativo, de tipo descriptivo, y la información se recolectó a través de una prueba diagnóstica y otra final. La muestra fue de 70 estudiantes de grado undécimo, de una institución educativa colombiana. Luego de aplicar la estrategia pedagógica con el simulador PHET, el puntaje promedio fue de 60,97 sobre 100, a diferencia del 43,02 obtenido inicialmente. La mayoría de estudiantes (45), se encontraba inicialmente en desempeño básico, mientras que en la prueba final, la mayor frecuencia se da en el desempeño alto, con 45 estudiantes. La diferencia en el desempeño es significativa, indicando que la estrategia pedagógica con tecnologías digitales generó resultados favorables. Se concluye que la simulación de fenómenos físicos permite a los estudiantes situarse en una actividad científica real, impactando positivamente en su proceso formativo

Design and construction of a portable spectrum analyzer using a graphic LCD and a freescale dsp56f807

 En el presente artículo se hallan contenido los resultados de la investigación realizada para el diseño y construcción de un equipo analizador de espectros portátil utilizando el procesador de señales digitales DSP56F807 miembro de la familia 56F800 de Freescale Semiconductor y una pantalla LCD gráfica. Se resalta este diseño como un ejemplo de aplicación directa de la teoría de tratamiento digital de señales y, se observa finalmente que los errores obtenidos son menores al 1% al implementar el algoritmo de radix-2 para calcular la Transformada Rápida de  fourier con diversas formas de onda.This article presents the results of the investigation carried out for the design and construction of a portable spectrum analyzer using the digital signal processor DSP56F807, a member of the family 56F800 of Freescale Semiconductor, and a screen LCD graph. This design is an example of a direct application of the theory of digital signal processing. It was finally observed that the obtained erros are smaller than 1% when implementing the radix-2 algorithm to calculate the fast fourier transform with different waveforms

Immunohistochemical detection of p53 and pp53 Ser392 in canine hemangiomas and hemangiosarcomas located in the skin

[EN] Background: p53 protein is essential for the regulation of cell proliferation. Aberrant accumulation of it usually occurs in cutaneous malignancies. Mutant p53 is detected by immunohistochemistry because it is more stable than the wild-type p53. However, post-translational modifications of p53 in response to ultraviolet radiation are important mechanisms of wild-type p53 stabilization, leading to positive staining in the absence of mutation. The aims were: 1) to analyze the immunohistochemical expression of p53 and phospho-p53 Serine392 in canine skin endothelial tumours; and 2) to determine if any relationship exists between p53 and phospho-p53 Serine392 overexpression and cell proliferation. Results: p53 and phospho-p53 Serine392 immunolabeling was examined in 40 canine cutaneous endothelial tumours (13 hemangiomas and 27 hemangiosarcomas). Their expression was associated with tumour size, hemangiosarcoma stage (dermal versus hypodermal), histological diagnosis and proliferative activity (mitotic count and Ki-67 index). Statistical analysis revealed a significant increase of p53 immunoreactivity in hemangiosarcomas (median, 74.61%; interquartile range [IQR], 66.97-82.98%) versus hemangiomas (median, 0%; IQR, 0-20.91%) (p <.001) and in well-differentiated hemangiosarcomas (median, 82.40%; IQR, 66.49-83.17%) versus hemangiomas (p =.002). Phospho-p53 Serine392 immunoreactivity was significantly higher in hemangiosarcomas (median, 53.80%; IQR, 0-69.50%) than in hemangiomas (median, 0%; IQR, 0.0%) (p <.001). Positive correlation of the overexpression of p53 and phospho-p53 Serine392 with mitotic count and Ki-67 index was found in the cutaneous vascular tumours (p <.001). The Ki-67 index of the hemangiomas (median, 0.50%; IQR, 0-2.80%) was significantly lower than that of the hemangiosarcomas (median, 34.85%; IQR, 23.88-42.33%) (p <.001), and that specifically of well-differentiated hemangiosarcomas (median, 24.60%; IQR, 15.45-39.35%) (p =.001). Immunolabeling of 18 visceral hemangiosarcomas showed that the p53 (median, 41.59%; IQR, 26.89-64.87%) and phospho-p53 Serine392 (median, 0%; IQR, 0-22.53%) indexes were significantly lower than those of skin (p =.001; p =.006, respectively). Conclusions: The p53 and phospho-p53 Serine392overexpression together with high proliferative activity in hemangiosarcomas versus hemangiomas indicated that p53 might play a role in the acquisition of malignant phenotypes in cutaneous endothelial neoplasms in dogs. The Ki-67 index may be useful in distinguishing canine well-differentiated hemangiosarcomas from hemangiomasS

Creación Gabinete de Fotografía de la Facultad de Bellas Artes

La creación de un Gabinete de Fotografía surge de la necesidad de contar con una colección de imágenes fotográficas que refleje la calidad de los trabajos realizados por los estudiantes durante su formación, así como de docentes vinculados a esta disciplina en la Facultad de Bellas Artes de la Universidad Complutense de Madrid. La voluntad de este proyecto es establecer un fondo para que cada año se nutra de los trabajos más representativos por su calidad artística o su finalidad educativa. La existencia de este gabinete permitirá disponer de un valioso documento de creación artística, compuesto por los trabajos desarrollados durante los estudios de grado y postgrado, a disposición de docentes e investigadores de muy diversas áreas, así como el estudio de un medio de expresión que se encuentra en constante evolución y está presente en todos los ámbitos de conocimiento

Investigación joven con perspectiva de género II

Actas del II Congreso de jóvenes investigadorxs con perspectiva de género (Getafe, 26 y 27 de junio de 2017) organizado por el Instituto Universitario de Estudios de Género de la Universidad Carlos III de Madrid

Early mobilisation in critically ill COVID-19 patients: a subanalysis of the ESICM-initiated UNITE-COVID observational study

Background Early mobilisation (EM) is an intervention that may improve the outcome of critically ill patients. There is limited data on EM in COVID-19 patients and its use during the first pandemic wave. Methods This is a pre-planned subanalysis of the ESICM UNITE-COVID, an international multicenter observational study involving critically ill COVID-19 patients in the ICU between February 15th and May 15th, 2020. We analysed variables associated with the initiation of EM (within 72 h of ICU admission) and explored the impact of EM on mortality, ICU and hospital length of stay, as well as discharge location. Statistical analyses were done using (generalised) linear mixed-effect models and ANOVAs. Results Mobilisation data from 4190 patients from 280 ICUs in 45 countries were analysed. 1114 (26.6%) of these patients received mobilisation within 72 h after ICU admission; 3076 (73.4%) did not. In our analysis of factors associated with EM, mechanical ventilation at admission (OR 0.29; 95% CI 0.25, 0.35; p = 0.001), higher age (OR 0.99; 95% CI 0.98, 1.00; p ≤ 0.001), pre-existing asthma (OR 0.84; 95% CI 0.73, 0.98; p = 0.028), and pre-existing kidney disease (OR 0.84; 95% CI 0.71, 0.99; p = 0.036) were negatively associated with the initiation of EM. EM was associated with a higher chance of being discharged home (OR 1.31; 95% CI 1.08, 1.58; p = 0.007) but was not associated with length of stay in ICU (adj. difference 0.91 days; 95% CI − 0.47, 1.37, p = 0.34) and hospital (adj. difference 1.4 days; 95% CI − 0.62, 2.35, p = 0.24) or mortality (OR 0.88; 95% CI 0.7, 1.09, p = 0.24) when adjusted for covariates. Conclusions Our findings demonstrate that a quarter of COVID-19 patients received EM. There was no association found between EM in COVID-19 patients' ICU and hospital length of stay or mortality. However, EM in COVID-19 patients was associated with increased odds of being discharged home rather than to a care facility. Trial registration ClinicalTrials.gov: NCT04836065 (retrospectively registered April 8th 2021)

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

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