Case of study: off-design performance simulation of a combined cycle taking account environmental conditions in Peru

Conferencia de la 20th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Education, Research and Leadership in Post-pandemic Engineering: Resilient, Inclusive and Sustainable Actions”. hybrid event, Boca Raton, Florida- USA, junio 18 - 22.The demand for electricity in the country and the world has increased consistently in recent years. Electricity from thermoelectric plants is a viable option that allows diversifying the electricity market and using fossil fuels such as natural gas. The influence of weather conditions on the performance of any machine can mean its viability or infeasibility from a technical and economic point of view. Combined cycle power generation plants are no exception to this fact, but rather their great physical magnitude as machines make them more vulnerable to climatic variables. Environmental conditions such as air temperature and atmospheric pressure significantly influence the performance of a thermoelectric plant, this thesis studies the effect that these climatic variables have on combined cycle comprising a Brayton cycle fed with natural gas and a Rankine cycle of three levels of pressure. Considering the local atmospheric pressure and ambient temperature in La Joya and Majes (located in the department of Arequipa) 8760 off design simulations for each hour of the year in both locations were performed and subsequently the results were compared. Having the same thermoelectric plant installed, the results show that the energy generated in the life of the plant is greater in La Joya than in Majes by 6.64% and that translates into an average annual electricity cost of 6.59% more in Majes than in La Joya, while the efficiency of the plant is 0.2414% higher in La Joya than in Majes. The model also determines the behavior of the plant in certain periods of the year, being the winter and autumn when the performance of the plant increases while in summer and spring periods performance is reduced. While early morning and evening hours are more productive for the plant than daylight hours.Campus Arequip

A Prolegomenon to the Systematics of South American Cottontail Rabbits (Mammalia, Lagomorpha, Leporidae: Sylvilagus): Designation of a Neotype for S. brasiliensis (Linnaeus, 1758), and Restoration of S. andinus (Thomas, 1897) and S. tapetillus Thomas, 1913.

A critical issue with species names derived from Linnaeus’ 10th edition of the Systema Naturae is the lack of holotypes, which in many instances has led to taxonomic confusion and uncertainty, as well as an unstable taxonomy. In the particular case of the South American cottontail, currently known as Sylvilagus brasiliensis, Linnaeus listed the type locality as “America Meridionali,” or South America. As a result, S. brasiliensis was ascribed a widespread distribution in North and South America, over an area estimated as approximately 1.09 × 107 Km2, and containing upwards of 37 named subspecies.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/136089/1/MP205.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/136089/2/MP205_SupplementaryFigs.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/136089/3/MP205_Appendix1.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/136089/4/MP205_Appendix 2.xlsxDescription of MP205.pdf : Main ArticleDescription of MP205_SupplementaryFigs.pdf : Additional FiguresDescription of MP205_Appendix1.pdf : Dataset - MapsDescription of MP205_Appendix 2.xlsx : Datase

La técnica de Elisa en el diagnóstico serológico de la leucosis bovina en Colombia.

En Colombia, la técnica más difundida para el diagnóstico de la leucosis bovina es la inmunodifusión en agar con antígeno gp-58. Con el objeto de ampliar los conocimientos, mejorar el diagnóstico y el control de la infección, buscando normalizar y comparar con la inmunodifusión las metodologías inmuno-enzimáticas se hizo el análisis de 786 bovinos pertenecientes a explotaciones con alta reactividad serológica a la infección. Según diagnóstico, previamente realizado por inmunodifusión, se obtuvo un aumento significativo en el establecimiento de animales positivos. Por lo anterior se recomienda el empleo combinado y complementario de la técnica de inmunodifusión actualmente empleada, con la de la técnica inmuno-enzimática, en programas de control que busquen en el corto o mediano plazo la erradicación de la infección en algunos hatos o regiones sometidos a programas especiales. Se describen las condiciones para la normalización de la técnica inmuno-enzimática aplicada al diagnóstico serológico de la infección por leucosis bovina. Se sugiere la aplicación de está metodología a otras entidades virales que afectan a la población bovina, siempre y cuando se cuente con un elevado número de controles negativos, antígenos altamente purificados y análisis estadísticos que garanticen la repetibilidad de los resultadosGanado de carne-Ganadería carneGanado de leche-Ganadería lech

Taxonomy Based on Science Is Necessary for Global Conservation [Formal comment]

Taxonomy is a scientific discipline that has provided the universal naming and classification system of biodiversity for centuries and continues effectively to accommodate new knowledge. A recent publication by Garnett and Christidis expressed concerns regarding the difficulty that taxonomic changes represent for conservation efforts and proposed the establishment of a system to govern taxonomic changes. Their proposal to “restrict the freedom of taxonomic action” through governing subcommittees that would “review taxonomic papers for compliance” and their assertion that “the scientific community\u27s failure to govern taxonomy threatens the effectiveness of global efforts to halt biodiversity loss, damages the credibility of science, and is expensive to society” are flawed in many respects. They also assert that the lack of governance of taxonomy damages conservation efforts, harms the credibility of science, and is costly to society. Despite its fairly recent release, Garnett and Christidis\u27 proposition has already been rejected by a number of colleagues. Herein, we contribute to the conversation between taxonomists and conservation biologists aiming to clarify some misunderstandings and issues in the proposition by Garnett and Christidis. Placing governance over the science of taxonomy blurs the distinction between taxonomy and nomenclature. Garnett and Christidis\u27s proposal is far-reaching but represents a narrow perspective of taxonomy, as utilized by conservation, and reflects an increasingly broad misunderstanding throughout biology of the scientific basis of taxonomy, formalized nomenclature, and the relationship between them. This trend may have resulted from the attenuation of instruction in taxonomic principles and, in particular, nomenclature at many universities, in part because of a shift in research priorities away from taxonomy

Experiencia del trabajo de profesores consultantes en el proceso de universalización en las ciencias médicas, 2007-2008 / The role of the consultant professor in the educative process of medical sciences, 2007- 2008

Se realiza un trabajo de carácter pedagógico, partiendo de la necesidad que presentan el claustro de profesores que se inician en la docencia en las Sede Universitarias y Unidades Provinciales de la provincia de Pinar del Río, relacionado con el fortalecimiento del Proceso Docente Educativo, con el propósito de contribuir al perfeccionamiento de los conocimientos y habilidades pedagógicas, mediante la asesoría metodológica del colectivo de profesores consultantes en las diferentes actividades docentes, asistenciales e investigativas, a través de la aplicación de métodos teóricos y empíricos. Se obtuvo una tendencia al incremento del nivel científico pedagógico de los profesores, lo que representa un impacto social que repercute en beneficio del Sistema Nacional de Salud y la calidad de la atención a la población. Palabras clave: docente médico, universidades, educación médica.  ABSTRACT According to the necessity that the academic staff has,and initiating in the tesching process at university and provincial venues in Pinar del Rio, a pedagogical work is done. This study is related to the strength of the educative teaching process which is aimed at contributing to the better performance of knowledge and pedagogical skills by the consultant professors in the different teaching assistential and investigative activities using theorethical and empirical methods. An increasing trend was obtained in the pedagogical scientific level of professors representing a social impact on the benefits of the national health system as well as on the population care. Key words: medical faculty, universities, medical education

Experiencia del trabajo de profesores consultantes en el proceso de universalización en las ciencias médicas, 2007-2008 / The role of the consultant professor in the educative process of medical sciences, 2007- 2008

Se realiza un trabajo de carácter pedagógico, partiendo de la necesidad que presentan el claustro de profesores que se inician en la docencia en las Sede Universitarias y Unidades Provinciales de la provincia de Pinar del Río, relacionado con el fortalecimiento del Proceso Docente Educativo, con el propósito de contribuir al perfeccionamiento de los conocimientos y habilidades pedagógicas, mediante la asesoría metodológica del colectivo de profesores consultantes en las diferentes actividades docentes, asistenciales e investigativas, a través de la aplicación de métodos teóricos y empíricos. Se obtuvo una tendencia al incremento del nivel científico pedagógico de los profesores, lo que representa un impacto social que repercute en beneficio del Sistema Nacional de Salud y la calidad de la atención a la población. Palabras clave: docente médico, universidades, educación médica.  ABSTRACT According to the necessity that the academic staff has,and initiating in the tesching process at university and provincial venues in Pinar del Rio, a pedagogical work is done. This study is related to the strength of the educative teaching process which is aimed at contributing to the better performance of knowledge and pedagogical skills by the consultant professors in the different teaching assistential and investigative activities using theorethical and empirical methods. An increasing trend was obtained in the pedagogical scientific level of professors representing a social impact on the benefits of the national health system as well as on the population care. Key words: medical faculty, universities, medical education

El impacto de la pandemia del COVID-19 en la educación médica: adaptabilidad y experiencia con enseñanza a distancia de la Sociedad Médica Peruano Americana

The COVID-19 pandemic had a significant impact on medical care and medical education in Peru.  In response, the Peruvian American Medical Society (PAMS), a charitable medical organization based in the USA, pursued its medical and educational missions in Peru by adopting virtual learning technology. We developed closer collaborative relationships with several medical schools and the Peruvian Association of Medical Schools (ASPEFAM) while offering a faculty panel of twenty-four members to provide lectures and multidisciplinary webinars in Spanish. We conducted 19 webinars including COVID -19 and non-COVID-19 related topics that over the last two years attracted 14,489 participants from 23 countries. They were the foundation for twenty publications in Peruvian medical journals. Our clinical investigations competition was positively received as was our pilot project on research mentorship. The COVID -19 pandemic had a positive effect on the educational mission of PAMS in Peru.La pandemia del COVID-19 tuvo un impacto significativo en el cuidado y la educación médicos en el Perú. En respuesta, la Sociedad Médica Peruano Americana (PAMS), una organización médica benéfica con sede en los EE. UU., adoptó sus misiones médicas y educativas en Perú usando estrategias virtuales. Desarrollamos colaboración con varias facultades de medicina y la Asociación Peruana de Facultades de Medicina (ASPEFAM) y ofrecimos un panel de veinte y cuatro miembros para brindar conferencias y seminarios multidisciplinarios en español. Hicimos 19 seminarios, incluyendo temas relacionados y no relacionados al COVID-19, que en los últimos dos años atrajo a 14 489 participantes de 23 países. Ellas fueron la base de 20 publicaciones en revistas médicas peruanas. Nuestro concurso de investigaciones clínicas y nuestro proyecto piloto de mentoría de investigación fueron recibidos positivamente. La pandemia del COVID-19 tuvo un efecto positivo en la misión educativa de PAMS en Perú