Showing papers by "Simón Bolívar University published in 2022"
TL;DR: In this paper , a generalization of a transregional polylogarithmic model was proposed for continuously describing the transfer characteristics of polycrystalline and amorphous Thin Film Transistors (TFTs) at all levels of inversion.
Abstract: This article presents a generalization of a transregional polylogarithmic model, previously proposed for continuously describing the transfer characteristics of polycrystalline and amorphous Thin Film Transistors (TFTs) at all levels of inversion. The present generalization entails including the necessary drain voltage dependencies to be able to describe also the output characteristics. The model is tested by using it in the design and analysis of a CMOS inverter amplifier consisting of poly-Si n- and p-channel TFTs fabricated at low temperature and pressure. The transistors are biased below threshold so that the CMOS amplifier circuit operates in weak conduction, having in mind energy saving considerations. The validity of the proposed model has been ascertained by comparing model simulations to actual measured data from individual poly-Si TFTs and from the CMOS amplifier circuit. The simulations of the CMOS inverter amplifier are compared to the results obtained using look-up table-type simulations.
2 citations
TL;DR: In this paper, the chemical speciation of ternary complexes of copper (II) with 6-methylpicolinic acid and different ligands, such as, components of the blood plasma of low molecular mass (lactic acid, oxalic acid, citric acid, and phosphoric acid) were studied by measurements of emf(H) in KNO3 1.00 mol.
2 citations
TL;DR: In this paper , the effect of let-thru currents of current-limiting fuses on numerical overcurrent relays was analyzed, and it was numerically shown that the use of two well-known relay algorithms to compute the fundamental component magnitudes gives an equivalent current equal to the peak value divided by 3.5.
2 citations
27 May 2022
11 May 2022
TL;DR: Garrido et al. as mentioned in this paper describe the desplazadas of the exilio español en Venezuela and the arquitectura desplazaada.
Abstract: Citation Vicente Garrido, Henry (2014). Arquitecturas desplazadas. Rafael Bergamín y las arquitecturas del exilio español en Venezuela. Thesis (Doctoral), E.T.S. Arquitectura (UPM). https://doi.org/10.20868/UPM.thesis.28998.
21 Jul 2022
TL;DR: In this paper , a research experiment is presented using model weighting with the participation of 6 climate model experts and 6 hydrological model experts, where the expert elicitation process follows a three-stage approach, with two individual elicitations of probabilities and a final group consensus, where experts are separated into two different community groups: a climate and a hydrologogical modeller group.
Abstract: Various methods are available for assessing uncertainties in climate impact studies. Among such methods, model weighting by expert elicitation is a practical way to provide a weighted ensemble of models for specific real-world impacts. The aim is to decrease the influence of improbable models in the results and easing the decision-making process. In this study both climate and hydrological models are analyzed and the result of a research experiment is presented using model weighting with the participation of 6 climate model experts and 6 hydrological model experts. For the experiment, seven climate models are a-priori selected from a larger Euro-CORDEX ensemble of climate models and three different hydrological models are chosen for each of the three European river basins. The model weighting is based on qualitative evaluation by the experts for each of the selected models based on a training material that describes the overall model structure and literature about climate models and the performance of hydrological models for the present period. The expert elicitation process follows a three-stage approach, with two individual elicitations of probabilities and a final group consensus, where the experts are separated into two different community groups: a climate and a hydrological modeller group. The dialogue reveals that under the conditions of the study, most climate modellers prefer the equal weighting of ensemble members, whereas hydrological impact modellers in general are more open for assigning weights to different models in a multi model ensemble, based on model performance and model structure. Climate experts are more open to exclude models, if obviously flawed, than to put weights on selected models in a relatively small ensemble. The study shows that expert elicitation can be an efficient way to assign weights to different hydrological models, and thereby reduce the uncertainty in climate impact. However, for the climate model ensemble, comprising seven models, the elicitation in the format of this study could only reestablish a uniform weight between climate models.
TL;DR: A visión de Xela Arias sobre a escrita reflectida in textos autopoéticos, conferencias ou entrevistas permite a reconstrución of a discurso metaliterario that non só define as claves da súa poética senón que a sitúa nunhas coordenadas estéticas e ideolóxicas as discussed by the authors .
Abstract: A visión de Xela Arias sobre a escrita reflectida en textos autopoéticos, conferencias ou entrevistas permite a reconstrución dun discurso metaliterario que non só define as claves da súa poética senón que a sitúa nunhas coordenadas estéticas e ideolóxicas. Das primeiras destaca a importancia da linguaxe —a palabra— nun constante exercicio de experimentación baseado na liberdade. Das segundas, a conciencia de estar a escribir desde unha condición, a de muller, e nunha lingua minorizada. E, como pano de fondo, a subversión da orde estabelecida, a denuncia dos falsos equilibrios e o cuestionamento da orde das cousas.
TL;DR: In this article , an estudio orientado a analizar cómo las emociones and conocimientos of actores viales contribuyen a cambiar their interacción con la ciudad.
Abstract: Atenuar la accidentalidad en nuestras ciudades latinoamericanas constituye un factor clave para que los diseñadores y los planificadores urbanos incluyan en sus propuestas diversas aproximaciones y estudios que permitan entender los comportamientos de las personas en el tema. Auscultar los mecanismos cognitivo-emocionales de los diferentes actores viales en el espacio público contribuye a la formulación de estrategias de diseño para configurar entornos seguros que reivindiquen la acción de caminar para los ciudadanos contemporáneos. Con el propósito de reducir la accidentalidad en la ciudad de Manizales, Colombia, se adelanta un estudio orientado a analizar cómo las emociones y los conocimientos de los actores viales contribuyen a cambiar su interacción con la ciudad. El horizonte metodológico del estudio es cualitativo y participativo, apoyado en orientaciones del diseño para el cambio de comportamiento, el diseño emocional y el diseño participativo (DP), con el objetivo de delinear la ruta proyectual para responder a la problemática de accidentalidad de la ciudad. Los resultados evidencian conocimientos limitados de peatones y conductores relacionados con la normatividad vial y emociones disímiles entre estos actores viales. Las conclusiones del estudio permiten proyectar un problema de diseño enfocado en desarrollar estrategias de DP que sincronicen emociones entre conductores y peatones induciendo al aprendizaje experiencial sobre normativas viales en contexto.
18 May 2022
TL;DR: In this article , a tesis aborda las influencias mutuas existentes entre la arquitectura and la música, a lo largo de la historia.
Abstract: La tesis aborda las influencias mutuas existentes entre la arquitectura y la música, a lo largo de la historia. Desde la antigüedad hasta nuestros días, en el ámbito occidental, recopilando y utilizando un amplio número de citas de distintos autores de todas las épocas que han tocado o sugerido dichas relaciones y desde los dos campos temáticos. Se realiza en tal sentido una lectura histórico de las relaciones entre música y arquitectura, empleando además ejemplos significativos de obras de músicos y arquitectos donde se había producido una especial imbricación entre dichas artes y muy particularmente de épocas moderna y contemporánea. La tesis plantea como conclusiones que existen bases comunes, paralelas y semejantes en el tiempo, en su composición y organización de carácter matemático al objeto de producir armonía y belleza, empleando como símbolo los aforismos de La arquitectura es música congelada y La música es arquitectura derretida, para definir las relaciones estudiadas.
14 Mar 2022
TL;DR: In this paper, full-wave-form acoustic logs have been used to compute the elastic properties of reservoir rocks to infer changes in fluids saturation, pressures, and temperatures during the production phase.
25 Aug 2022
03 Jun 2022
TL;DR: In this article , a research experiment is presented using model weighting with the participation of 6 climate model experts and 6 hydrological model experts, where the expert elicitation process follows a three-stage approach, with two individual elicitations of probabilities and a final group consensus, where experts are separated into two different community groups: a climate and a hydrologogical modeller group.
Abstract: Various methods are available for assessing uncertainties in climate impact studies. Among such methods, model weighting by expert elicitation is a practical way to provide a weighted ensemble of models for specific real-world impacts. The aim is to decrease the influence of improbable models in the results and easing the decision-making process. In this study both climate and hydrological models are analyzed and the result of a research experiment is presented using model weighting with the participation of 6 climate model experts and 6 hydrological model experts. For the experiment, seven climate models are a-priori selected from a larger Euro-CORDEX ensemble of climate models and three different hydrological models are chosen for each of the three European river basins. The model weighting is based on qualitative evaluation by the experts for each of the selected models based on a training material that describes the overall model structure and literature about climate models and the performance of hydrological models for the present period. The expert elicitation process follows a three-stage approach, with two individual elicitations of probabilities and a final group consensus, where the experts are separated into two different community groups: a climate and a hydrological modeller group. The dialogue reveals that under the conditions of the study, most climate modellers prefer the equal weighting of ensemble members, whereas hydrological impact modellers in general are more open for assigning weights to different models in a multi model ensemble, based on model performance and model structure. Climate experts are more open to exclude models, if obviously flawed, than to put weights on selected models in a relatively small ensemble. The study shows that expert elicitation can be an efficient way to assign weights to different hydrological models, and thereby reduce the uncertainty in climate impact. However, for the climate model ensemble, comprising seven models, the elicitation in the format of this study could only reestablish a uniform weight between climate models.
28 Mar 2022
TL;DR: In this paper , the main results and advances achieved during more than 20 years of learning and working with the Pemón Indigenous peoples in northern Amazonia and the escalation towards new fire management policies in Venezuela are summarized.
Abstract: <p><span xml:lang="EN-GB" data-contrast="auto"><span>Under the current changing climate and social governance conditions, wildfires occurrence in Latin America has become a critical issue, trespassing academic and technical disputes, and reaching sensible socio-political arenas. Developing a new vision and capacities for the integral and intersectoral management of wildfires instead of only fighting them requires the inclusion of multiple perspectives, actors and the rescue of the adaptive knowledge and practices of local communities that inhabit natural spaces. This paper summarizes the main results and advances achieved during more than 20 years of learning and working with the Pem&#243;n Indigenous peoples in northern Amazonia and the escalation towards new fire management policies in Venezuela. Our results reveal a sophisticated Indigenous knowledge system on using fire in the main subsistence activities, especially shifting cultivation and collaborative burning practices at the savanna-forests transition to protect forests from catastrophic wildfires. In addition, long-term fire experiments demonstrated that fire exclusion practices promote more severe wildfires by fuel accumulation, enhanced by the drier and warmer weather conditions. Through the inclusion of Indigenous peoples, firefighters, public officials and academics in field research and joint experimentation, as well as in debates and dialogues on socio-ecological aspects, a paradigm shift was successfully negotiated of fire that values the relevance of the ancient Pem&#243;n culture in Venezuela in the sustainable management of resources, as well as adaptation and mitigation capacity to climate change. Currently, these experiences are being capitalized to create a national integrated fire management policy preserving the same participatory, intercultural and intersectoral principles.</span></span><span>&#160;</span></p>
01 Jul 2022
14 Mar 2022
11 Jan 2022
31 Mar 2022
25 Jul 2022
TL;DR: In this paper , el arbolado urbano nativo de la localidad de Teusaquillo con the figura de sujeto de derechos was investigated, utilizando a los árboles como un elemento for la creación of un proyecto for the gobernanza ambiental de la locality.
Abstract: Esta investigación tiene como objetivo proteger el arbolado urbano nativo de la localidad de Teusaquillo con la figura de sujeto de derechos. Utilizando a los árboles como un elemento para la creación de un proyecto para la gobernanza ambiental de la localidad con base en la normativa colombiana, la Ley 99, el Código Nacional de Recursos Naturales Renovables y de Protección al Medio Ambiente, pero enfocándome en las Sentencias T-622/16 rio Atrato y STC 4360/2018 la protección de la Amazonía Colombiana emitidas por la Corte Suprema. Este estudio se realizó en la localidad de Teusaquillo, demostrando la importancia ambiental que tiene localidad en la ciudad. Esto se debe a la conformación particular del arbolado público que incluye en el parque Simón Bolívar, la biblioteca Virgilio Barco, el humedal Salitre-Greco, la Universidad Nacional, el parkway, la alameda de calle 53, la alameda de la diagonal 61 c, la alameda de CAN, entre otros ecosistemas. Evidenciando la importancia de realizar proyectos y programas basados en el cuidado del arbolado público en las localidades para fomentar el cuidado ambiental de la ciudad.