Design, Simulation and Thermo-Economic Assessment of a Transcritical Carbon Dioxide Solar Power Plant for Medium-Scale Electricity and Heat Generation

This project comprises the engineering design and assessment of the novel above critical-point Carbon Dioxide cycle technology integrated with a solar Parabolic Trough Collector (PTC) plant. To accomplish this, preliminary studies were first performed on initial simple calculations of the thermodynamics of the different CO2 cycles and solar energy technology. Knowledge was also acquired through an ongoing literature review. A design model was then developed in EES, to assist in the design of the different systems of the power plant including the solar field, power block and components such as turbomachines and heat exchangers. Another model was developed in EES to simulate for average and median days for each month in the year by inputting a meteorological TMY3 data set and obtaining performance results. Pre-processing of data inputs and post-processing of outputs was done with MATLAB, as well as the understanding of the meteorological design conditions of the location chosen for the analysis, which is College Station, TX. Next, the results were confirmed with more advanced simulation software, namely SAM, provided by NREL. A one 1-MW facility with a simple transcritical CO2 cycle, which also provided cogeneration heat for a small industry (case A), was proposed as a baseline plant. Other alternatives studied were: a 10-MW facility for University Campus Utilities (case B), a 1-MW plant with a Recompression CO2 cycle (case C), and finally a 1-MW plant with a supercritical CO2 cycle (case D). Results obtained for the baseline plant show an LCOE of $0.2915/kWh while lowest LCOE obtained was the one for alternative B:$0.2613/kWh. Although it was concluded that this technology not in position to make a market penetration, a sensitivity analysis was performed revealing important clues as to how the energy cost could be reduced so as to make it more viable in the future

Diseño y producción de contenido para “shortcut”: canal multiplataforma de tutoriales de adobe premiere pro y adobe after effects

El siguiente trabajo consiste en el diseño y producción de contenido para Shortcut, un canal multiplataforma de tutoriales de edición y animación digital, creado para difundir contenido técnico. Este incluye el diseño de la identidad visual de la marca y la producción del contenido, que comprende de videotutoriales para YouTube, gráficas para redes sociales y mini tutoriales para Reels y TikTok. El objetivo fue crear contenido de calidad, conciso y de corta duración, que pudiera brindar soluciones rápidas a problemas específicos. Finalmente, se presenta un apartado de las lecciones que fueron aprendidas en el transcurso de la implementación del proyecto.This project consists of the design and production of content for Shortcut, a multi platform channel of digital editing and animation tutorials, created to disseminate technical content. This includes the design of the visual identity of the brand and the production of the content were carried out, which were YouTube videos, graphics for social networks and mini-tutorials for Reels and TikTok. The objective was to create quality, concise and short-term content, which could provide quick solutions to specific problems. Finally, a section on the lessons learned during the implementation of the project is presente

Comparison of Optimization Methods for Aerial Base Station Placement with Users Mobility

Aerial base stations have been recently considered in the deployment of wireless networks. Finding the optimal position for one or multiple aerial base stations is a complex problem tackled by several works. However, just a few works consider the mobility of the users which makes necessary an online optimization to follow the changes in the scenario where the optimization is performed. This paper deals with the online optimization of an aerial base station placement considering different types of users mobility and three algorithms: a Q-learning technique, a Gradient-based solution and a Greedy-search solution. Our objective is to minimize in an urban environment the path loss of the user at street level with the highest path loss. Simulation results show that the performance of the three methods is similar when a high number of users move randomly and uniformly around the scenario under test. Nevertheless, in some situations when the number of users is reduced or when the users move together in a similar direction, both Gradient and Greedy algorithms present a significantly better performance than the Q-learning method.The work of Danaisy Prado was supported by the H2020 Marie Curie Program, with Project Grant No. 766231 WAVECOMBE - ITN - 2017Prado-Alvarez, D.; Inca-Sanchez, SA.; Martín-Sacristán, D.; Monserrat Del Río, JF. (2019). Comparison of Optimization Methods for Aerial Base Station Placement with Users Mobility. IEEE. 485-489. https://doi.org/10.1109/EuCNC.2019.8802053S48548

Comportamiento de las genodermatosis en el municipio de San Juan y Martínez

Introduction: genetic diseases and congenital defects constitute the second cause of death only in the child of one year; these diseases can be of chromosomal, multifactorial and monogenetic origin. Genodermatoses are included in the last one, where the early diagnosis influences on the prognosis of life of the genetic carrier.Objective: to characterize the behavior of genodermatoses in San Juan y Martinez municipality in the period 2018-2019.Methods: a descriptive, cross-sectional research was conducted, with a target group comprising 476 patients with genetic diseases and a sample of 40 patients with genodermatoses; working with the variables of age, sex, color of skin, family history, type of genodermatosis and type of hereditary patterns, through the collection of data for the review of clinical histories.    Results: it was recorded that 83,3 % belonged to male sex, white skin color prevailed (78 %), 29 patients had no family history, ichthyosis (27,5 %) predominated, and autosomal dominant hereditary pattern was the most frequent (70 %). Conclusions: genetic diseases are gaining a greater position in society every day, as a result preventive actions must be taken, starting from the Primary Health Care in order to counteract its incidence and improve the quality of life of the patients. Introducción: las enfermedades genéticas y defectos congénitos constituyen la segunda causa de muerte en menores de un año, conociendo que estas enfermedades pueden ser de origen cromosómico, multifactorial y monogénicas. En esta última se incluyen las genodermatosis, donde el diagnóstico precoz influye en el pronóstico de vida del paciente que la contrae.Objetivo: caracterizar el comportamiento de las genodermatosis en el municipio de San Juan y Martínez en el período 2018-2019.Métodos: se realizó una investigación descriptiva y transversal, con un universo de 476 pacientes con enfermedades genéticas y una muestra de 40 pacientes con genodermatosis. Se trabajó con las variables: edad, sexo, color de la piel, antecedentes familiares, tipo de genodermatosis y tipo de patrones de herencia, mediante la obtención de datos por la revisión de historias clínicas.Resultados: se obtuvo que el 83,3 % pertenecían al sexo masculino, predominó el color de la piel blanca con un 78 %, 29 pacientes no tuvieron antecedentes patológicos familiares, predominaron las ictiosis con un 27,5 %, y el patrón de herencia más frecuente fue el autosómico dominante con un 70 %.Conclusiones: las enfermedades genéticas cada día ganan un lugar mayor en la sociedad, por lo que se deben intensificar las acciones preventivas desde la atención primaria de salud, para así contrarrestar su incidencia y mejorar la calidad de vida de los pacientes

Comportamiento de las genodermatosis en el municipio de San Juan y Martínez

Introduction: genetic diseases and congenital defects constitute the second cause of death only in the child of one year; these diseases can be of chromosomal, multifactorial and monogenetic origin. Genodermatoses are included in the last one, where the early diagnosis influences on the prognosis of life of the genetic carrier.Objective: to characterize the behavior of genodermatoses in San Juan y Martinez municipality in the period 2018-2019.Methods: a descriptive, cross-sectional research was conducted, with a target group comprising 476 patients with genetic diseases and a sample of 40 patients with genodermatoses; working with the variables of age, sex, color of skin, family history, type of genodermatosis and type of hereditary patterns, through the collection of data for the review of clinical histories.    Results: it was recorded that 83,3 % belonged to male sex, white skin color prevailed (78 %), 29 patients had no family history, ichthyosis (27,5 %) predominated, and autosomal dominant hereditary pattern was the most frequent (70 %). Conclusions: genetic diseases are gaining a greater position in society every day, as a result preventive actions must be taken, starting from the Primary Health Care in order to counteract its incidence and improve the quality of life of the patients. Introducción: las enfermedades genéticas y defectos congénitos constituyen la segunda causa de muerte en menores de un año, conociendo que estas enfermedades pueden ser de origen cromosómico, multifactorial y monogénicas. En esta última se incluyen las genodermatosis, donde el diagnóstico precoz influye en el pronóstico de vida del paciente que la contrae.Objetivo: caracterizar el comportamiento de las genodermatosis en el municipio de San Juan y Martínez en el período 2018-2019.Métodos: se realizó una investigación descriptiva y transversal, con un universo de 476 pacientes con enfermedades genéticas y una muestra de 40 pacientes con genodermatosis. Se trabajó con las variables: edad, sexo, color de la piel, antecedentes familiares, tipo de genodermatosis y tipo de patrones de herencia, mediante la obtención de datos por la revisión de historias clínicas.Resultados: se obtuvo que el 83,3 % pertenecían al sexo masculino, predominó el color de la piel blanca con un 78 %, 29 pacientes no tuvieron antecedentes patológicos familiares, predominaron las ictiosis con un 27,5 %, y el patrón de herencia más frecuente fue el autosómico dominante con un 70 %.Conclusiones: las enfermedades genéticas cada día ganan un lugar mayor en la sociedad, por lo que se deben intensificar las acciones preventivas desde la atención primaria de salud, para así contrarrestar su incidencia y mejorar la calidad de vida de los pacientes

Influence of two polymer-based superplasticizers (poly-naphthalene sulfonate, PNS, and lignosulfonate, LS) on compressive and flexural strength, freeze-thaw, and sulphate attack resistance of lime-metakaolin grouts

A new range of grouts prepared by air lime and metakaolin (MK) as a pozzolanic admixture has been obtained by using as dispersing agents two polymers, namely poly-naphthalene sulfonate (PNS) and lignosulfonate (LS), with the aim of improving the fluidity of the fresh grouts. Fluidity and setting times of the grouts were assessed. Differences in the molecular architecture and in the anionic charge density explained the different adsorption of the polymers and the different performance. The higher anionic charge of PNS and its linear shape explained its better adsorption and effectiveness. The pozzolanic reaction was favoured in grouts with PNS, achieving the highest values of compressive strength (4.8 MPa after 182 curing days). The addition of PNS on lime grouts slightly decreased the frost resistance of the grouts (from 24 freeze-thaw cycles for the polymer-free samples to 19 or 20 cycles with 0.5 or 1 wt % of PNS). After the magnesium sulphate attack, grouts were altered by decalcification of hydrated phases and by formation of hexahydrite and gypsum. A protective role of portlandite against magnesium sulphate attack was clearly identified. Accordingly, the polymer LS, which preserves a significant amount of Ca(OH)2, could be an alternative for the obtaining of grouts requiring high sulphate attack resistance

Hydrophobized lime grouts prepared with microsilica and superplasticizers

This work reports the obtaining of lime-based grouts as repairing materials. Microsilica was added as pozzolanic additive to enhance the compressive strength of the hardened grouts. Sodium oleate, as water repellent admixture, and different superplasticizers were also incorporated to reduce the water absorption and to enhance the injectability of the grouts. Polycarboxylate ether (PCE), polynaphthalene sulfonate (PNS), melamine sulfonate (MMS) and polyacrylic acid (PA) were tested as plasticizing agents. Regarding the fluidity of the grouts, PCE was seen to improve the injectability, followed by PNS, MMS and PA. However, PCE addition was also accompanied by a severe delay in the setting time. The other three superplasticizers did not provoke significant delays in the hardening of the samples. The water contact angle underwent an increase pointing to an effective hydrophobization of the surface as a consequence of the water repellent admixture. The combination with PCE was the most effective in keeping the water repellency in comparison with the control sample (lime grout + oleate). MMS yielded high compressive strengths and durability of the mortars, in the face of freezing-thawing cycles, was enhanced

Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-\gamma}$ with index $\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV.Comment: Replaced with published version. Added journal reference and DO