409 research outputs found
mohller/AstroPhoMes: AstroPhoMes v0.4
No full textThe code has been updated to reflect the state of the paper L. Morejon et al 2019 at the moment it was accepted for publication.
Changes from previous version:
Corrected in EmpiricalModel class the pion inclusive cross section treatment for energies above 1 GeV (see paper)
Included a test to evaluate the correctness of the implementation
Modifications to the Howto_example.ipynb notebook to be consistent with the rest of the changes
Further testing is ongoing..
Improved photomeson model for interactions of cosmic ray nuclei
No full textPhotohadronic interactions are important for the sources and the transport of Ultra-High Energy Cosmic Rays (UHECRs). Current state-of-the-art cosmic ray transport simulations handle nuclear disintegration at energies of the Giant Dipole Resonance at a more sophisticated level, as well as the photohadronic interactions of nucleons in the high-energy regime above the pion production threshold. However, the interactions of nuclei above the pion production threshold are commonly modeled by treating the nucleus as a superposition of free nucleons-ignoring the effect of the nuclear medium. We construct an improved, inclusive model for the photomeson regime for nuclei with A ≤ 56 by employing more accurate, data-driven parametrizations of the interaction cross section, the fragmentation of the primary nucleus and the inclusive pion production cross section that directly affects the production of astrophysical neutrinos. We apply our results to two multi-messenger scenarios (Tidal Disruption Events and Gamma-Ray Bursts) in which photonuclear interactions in the photomeson regime are the dominant cooling process for the highest energy cosmic rays. While we find moderate changes to the mass composition of UHECRs, the astrophysical neutrino fluxes exhibit a significant (factor of a few) reduction compared to the naive superposition of free nucleons for sources of UHECR nuclei with a populated cascade. The numerical code implementing the model has been made publicly available, which facilitates the integration of our results in similar frameworks
Thermal comfort evaluation in an educational building with air conditioning located in the warm tropical climate of Colombia
No full textThe objective of this work is to evaluate the perception of thermal comfort that students have in building 10 of the Universidad de la Costa located in the city of Barranquilla. For the investigation the methods for the thermal comfort evaluation are analyzed, selecting the Steady-State methodology of Fanger according to the ASHRAE 55 Standard. With the application of the surveys, the thermal sensation that the students had in the building was evaluated, which was preferably fresh and thermal acceptability where 87% responded satisfactorily to indoor climate conditions in classrooms. It was also obtained that the perception of inner thermal comfort is between 21.1 ° C and 23 ° C of temperature. With the results obtained, recommendations are issued to ensure that students feel thermal comfort and the proper regulation of air conditioning systems.BALBIS MOREJON, MILEN-will be generated-orcid-0000-0002-8053-6651-600Noya-Sambrano,
Energy performance analysis between two air conditioning systems used in an educational Building in warm-climate
No full textEnergy saving measures, in the design air conditioning systems, are crucial in the development of energy schemes with rational energy consumption. Traditionally, integrated buildings systems have been assessed individually to optimize the energy performance, however they have different parameters that affect energy performance that demands the use of detailed analysis using dynamic simulation. This paper is focused on compare an air conditioning system to be implemented in educational buildings in warm-climate, considering energy schemes provide for a constant air volume (CAV) flow system with a water chiller, while the other integrates a variable refrigerant flow (VRF) system. Adding in each case dedicated outdoor air System (DOAS) units. Energy consumption achieved by each AC system is obtained considering the configuration achieving energy savings of 40% of the annual electricity demand for cooling. Finally, the use of DOAS represents an increase of 20% of total electricity consumption.BALBIS MOREJON, MILEN-will be generated-orcid-0000-0002-8053-6651-600Silva-Ortega, J ICastro-Peña,
Evaluación de la climatización en locales comerciales, integrando técnicas de termografía, simulación y modelado por elementos finitos
No full textThis study integrates different techniques to analyze some issues of the air conditioning system of a commercial establishment. A thermographic camera is used to assess the temperature profile in the area covered by the air conditioning system and also to detect the higher temperature spots. The air conditioning system of the facility is simulated using the software Trnsys to estimate the indoor temperature and the thermal load profile. Afterward, using computer-aided design, a model of the air circulation in the thermal zone is developed, which is simulated using the finite element method to obtain the temperature profile in the area. As a result, a new operational scheme of the air conditioning that improves the temperature profile is proposed.Madrigal, José A-74fc42b9-1d55-4218-ac68-a7fa1a4f8283-0Cabello Eras, Juan Jose-0000-0003-0949-0862-600Sagastume Gutierrez, Alexis-0000-0003-0188-7101-600Balbis Morejon, Milen-0000-0002-8053-6651-60
Age-dependent changes in protein incorporation into collagen-rich tissues of mice by in vivo pulsed SILAC labelling
No full textCollagen-rich tissues have poor reparative capacity that predisposes to common age-related disorders such as osteoporosis and osteoarthritis. We used in vivo pulsed SILAC labelling to quantify new protein incorporation into cartilage, bone, and skin of mice across the healthy life course. We report dynamic turnover of the matrisome, the proteins of the extracellular matrix, in bone and cartilage during skeletal maturation, which was markedly reduced after skeletal maturity. Comparing young adult with older adult mice, new protein incorporation was reduced in all tissues. STRING clustering revealed changes in epigenetic modulators across all tissues, a decline in chondroprotective growth factors such as FGF2 and TGFβ in cartilage, and clusters indicating mitochondrial dysregulation and reduced collagen synthesis in bone. Several pathways were implicated in age-related disease. Fewer changes were observed for skin. This methodology provides dynamic protein data at a tissue level, uncovering age-related molecular changes that may predispose to disease
Identificación de las competencias profesionales del ingeniero eléctrico de la Corporación Universitaria de la Costa CUC, año 2011
No full textEn el presente proyecto IDENTIFICACIÓN DE LAS COMPETENCIAS PROFESIONALES DEL INGENIERO ELÉCTRICO DE LA CORPORACIÓN UNIVERSITARIA DE LA COSTA CUC, AÑO 2011, se da respuesta a la necesidad que presenta el programa en la realización de una caracterización de las competencias necesarias para el Ingeniero Eléctrico para llevar a cabo el proceso de actualización curricular siguiendo los lineamientos de la Corporación Universitaria de la Costa. Considerando que, en la formación de los ingenieros eléctricos de la CUC, es importante tener en cuenta los cambios que se generan en el sector empresarial, se necesitaba conocer las competencias profesionales requeridas por el entorno empresarial para llevar a cabo una actualización en el mapa de competencia del programa. Para la elaboración del mapa de competencias se recogieron las opiniones de los estudiantes, empresarios y docentes del programa, identificado las debilidades y necesidades respecto a pensum analizado encontrándose aportes importantes que llevaron a seguir el proceso. También se realizó la comparación del plan de estudio que en el momento de la investigación estaba activo en el programa con los planes de estudio de universidades nacionales e internacionales para realizar la presentación del mapa de competencias, encontrándose las fortalezas ante otras instituciones. Una vez se contó con todos los elementos, se llevó a cabo el diseño del mapa de competencias del programa de Ingeniería Eléctrica y finalmente se realiza una propuesta de las asignaturas que responden al mapa elaborado y pueden formar parte de la actualización curricular del programaIn this Project IDENTIFICATION OF THE PROFESIONAL OUTCOMES OF ELECRICAL ENGINEERING OF THE CORPORACIÓN UNIVERSITARIA DE LA COSTA CUC, YEAR 2011 is given an answer to the presented needs of the program in the development of a characterization of the outcomes that are required for the electrical Engineering to carry out the process of updating the curriculum of the program, Following the guidelines of the institution. Considering that in the educational process of an electrical Engineering of the CUC, it is important to take into account the changes that are generated in the business. It was necessary to know the professional outcomes that are required in the industrial and business area to make the development of the actualization of the outcomes map of the program. For the building-up of the outcome map where collected the opinions and considerations of students, entrepreneurs and professors of the program. There were identified the weakness and needs of the current curriculum, there were found important contribution that carry out the process that was followed. Also was realized the comparison of the current curriculum that has been applied in the program with the curriculum of national and international universities to get in focus the development of the outcome map and of this form identify clearly the strengths in contrast with other institutions. Once were collected all the elements, there was developed the design of the outcomes map of the Electrical Engineering program and finally was done the purpose of the subjects that respond to the drawn map and that can be part of the updating curriculum of the program.Balbis Morejon, Milen-0000-0002-8053-6651-60
Valor nutricional del maguey deshidratado de cacao (Theobroma cacao L.) nacional para la elaboración de barras nutricionales de uso alimentario.
No full textThe aim was determine the nutritional value of dried maguey cocoa (Theobroma cacao L.) National to elaborate nutritional bars. Was utilized a Design Completely Random applied within a bifactorial array using three methods of dehydration with three methods, and three repetitions. The Tukey test (p≤0.05) for the physicochemical variables was evaluated, T1, T4, T6 and T5 (forced air oven, to bake and osmotic dehydration with honey was used to determine differences between means of physico-chemical analysis and baking with glucose syrup) they are the best treatments. The higher protein content (8.25%) and fiber (8.63%) presented the treatments T8 and T2 (forced air heater and osmotic dehydration glucose syrup). Sensory analysis of Kruskal Wallis test was applied to the respective Ward dendrogram using Euclidean distance, the best treatment was the T5. Microbiological analysis it was concluded that all treatments evaluated met the Standard NTE INEN 2085: 2005 for cookies or baked goods. As for the cost/benefit ratio recording the highest value the treatment T3 (forced air heater and molasses) with $ 0.39 for every dollar invested, with a gain of 39.14%.La presente investigación tuvo como objetivo determinar el valor nutricional del maguey deshidratado de cacao (Theobroma cacao L.) Nacional para la elaboración de barras nutricionales de uso alimentario. Se aplicó un Diseño Completamente al Azar dentro de un arreglo bifactorial utilizando tres métodos de deshidratación con tres aglutinantes, y tres repeticiones. Para determinar diferencias entre medias de los análisis fisicoquímicos se utilizó el test de Tukey (p≤0.05), para las variables fisicoquímicas evaluadas, los tratamientos T1, T4, T6 y T5 (estufa al aire forzado, horneo y deshidratación osmótica con miel de abeja y horneo con jarabe de glucosa) se ubican como los mejores tratamientos. Mientras que el mayor contenido en proteína (8.25%) y fibra (8.63%) lo presentaron los tratamientos T8 y T2 (estufa al aire forzado y deshidratación osmótica con jarabe de glucosa). Para los análisis sensoriales se aplicó la prueba de Kruskal Wallis con el respectivo fenograma de Ward utilizando la distancia euclídea, el mejor tratamiento fue el T5. En los análisis microbiológicos se concluyó que todos los tratamientos evaluados cumplieron con las Norma NTE INEN 2085:2005 para galletas o productos horneados. En cuanto a la relación beneficio/costo el mayor valor lo registró el tratamiento T3 (estufa al aire forzado y miel de caña) con 0.39 dólares por cada dólar invertido, con una utilidad de 39.14%
English as a Lingua Franca in Europe and Asia: teaching policy on the ground
No full textThe present thesis considers the topic of English as a Lingua Franca as it is perceived and experienced by three groups: the ELF research community, ELT professionals, and ELF users themselves. This thesis first presents an overview of the theoretical foundations of ELF research, identifying key topics with which the ELF research community has grappled in recent decades. In order to determine how much closer the ELT community has gotten to aligning teaching policy, practices, and goals to students' specific needs and expectations, sociolinguistic research in the form of seven semi-structured interviews was conducted with L2 English speakers who use ELF to live, work, and study in their daily lives, and the ELT professionals tasked with developing their English skills in the classroom. The content of these interviews is then analyzed with regard to the specific needs and expectations of ELF users and the concerns of ELT professionals, followed by a discussion of the key issues uncovered in these interviews in light of the theoretical background of ELF research. The author provides suggestions for further research aimed at improving the ELT community's role in developing ELF proficiency in the expanding circle. Keywords: English as a Lingua Franca, English Language Teaching, Expanding Circle, ELF..
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