Determining neutralino parameters in Left-Right Supersymmetric Models

We report exact analytical expressions relating the fundamental parameters describing the neutralino sector in the context of the left-right supersymmetric model. The method used for such a effects is the projector formalism deduced without take into account the Jarlskog's projector formulae. Also, expressions for the neutralino masses and the neutralino mixing matrix are determined . The results are compared with numerical and analytical ones obtained in similar scenarios in the context of the minimal supersymmetric standard model.Comment: 34 pages, 23 figure

Au fil des îles, archipels

L’exposition Au fil des îles, archipels a été présentée au Centre d’exposition de l’Université de Montréal du 8 septembre au 19 novembre 2022 dans le cadre de la programmation 2022-2023

Gamified dances, digital and socio-emotional skills in collaborative virtual environments of university students surviving the Covid-19 virus

The use of virtual dance avatars and virtual learning guides has enabled gamified dance teaching to virtualize the current university. In this experience, the objective was to test four hypotheses about the gamified dance developed in collaborative Zoom environments, and its effects on the digital and socioemotional skills of individuals who were severely or moderately infected by the Covid-19 virus between the years 2020 and 2022. We worked with 119 students and eight teachers from the Professional School of Primary Education of a private university in the city of Lima (Peru). An experimental design with pre and post-test was applied and Likert-type scales were used for data collection. The experience with gamified dances took place over four weeks in a dance competition at the university. The results allow us to assert that gamified dances developed digital skills, emotional skills, as well as socioemotional skills. These skills differ between the experimental group and the control group, with the exception of digital security skills, and the ability to improve self-esteem, which are skills that require more body practice as was achieved in the experimental group (dance virtual), which was also developed in the students of the control group (face-to-face dance)

Geochemical survey of hot and cold waters around the Misti volcano, Peru

The summit of Misti volcano (5822 m.s.n.m.) is located at 17 km from the downtown of Arequipa (~1000000 inhabitants), the second largest and important city of Peru. The volcano piedmont extends to the vicinity of the city and includes the most recent volcanic products of its activity (Sub-plinian eruption ~340 BC - 200 AD). The present day volcanic activity is limited to fumarolic emissions at the summit. Hazards related to this volcano are tephra falls, pyroclastic flows and surges that would reach 13 km far from the crater and according to the crater geometry it is probable that the direction of future pyroclastic flows will be to the south reaching the suburbs of the city. Consequently, Misti appears as one of the highest priority in volcano monitoring in southern Peru. Since 1998, after a geochemical survey on some 15 springs around Misti, we selected and started monitoring the “Charcani V”, hot spring located 6 km northwest from the crater, between 3250 and 3550m altitude. This work allowed us to establish a baseline that depicts short-term (weekly to monthly) variations in composition and physical parameters. Analyses of the water s collected around the volcano displays evident geochemical trends that are interpreted as the result of mixing processes between fresh meteoric waters and magmatic fluids, sometimes interacting with a deep chloride reservoir. In fact, we can distinguish three types of waters: - Earth-alkalinechloride- sulfate, - Alkalinechloride-sulfate, - Alkalinebicarbonate-sulfate. According to the results obtained during the period of 8 year-old monitoring (1998 to 2005), it has been observed that the chloride (Cl-), Sulphate (SO42-) ions and the parameters of temperature and pH have suffered considerable pulsations in the period comprising the year 2001. Also, in the part summit part of the Misti volcano we noticed important variations: 1) an increase of the fumarolic intensity of the crater active visible from Arequipa city since beginnings of the month of August of the 2001, 2) an increase of the temperature in the crater dome that varied from a maximum of 221ºC (December 1, 1997) until a maxim um of 430ºC (September 11, 2001). In coincidence with the physical and chemical variations observed in mid 2001 a strong (8.2 Mw) earthquake occurred in the southern Peru on June 23. The reported hypocentral location was 16º14' lat. S, 73º31' long W and 28 Km of depth. On active volcanoes, sulfate and chlorine elements essentially come from the interaction of water with acid gas species (HC1, SO2/H2S). Therefore, the observed geochemical changes could be explained by a mixing between the hydrothermal water with surrounding shallow cold waters with lower sulfate and chlorine concentrations. This mixing process could be the consequence cause of a permeability increase inside the volcanic edifice due to the intense shake induced by the earthquake of June 23rd, 2001

Identification of new sources of resistance to RHBV- rice hoja blanca virus

With the aim to find new sources of resistance to rice hoja blanca (white leaf) disease, transmitted by the insect Tagosodes orizicolus, 660 genotypes were evaluated under greenhouse and field conditions. Seven resistant genotypes were identified, and genomic studies were performed to demonstrate that the resistance in these sources is genetically different from that of Fedearroz 2000, which is currently the variety with the most resistance to hoja blanca. These new resistance sources constitute a resource that can be used to sustainably extend hoja blanca disease management throughout all of the rice-growing regions of tropical America. This is the first report of hoja blanca resistance in indica rice and different from that of Fedearroz 2000

Factores que complican la nutrición en pacientes embarazadas que asisten al centro de salud Lucrecia Lindo sector # 1 del municipio de san Ramón, del departamento de Matagalpa en el II semestre del año 2016

Según MINSA (Ministerio de Salud). La nutrición es un proceso biológico mediante el cual, el cuerpo recibe y utiliza de forma equilibrada energía y nutrientes de los alimentos que se consumen cada día, permite que nuestro organismo funcione adecuadamente para crecer, trabajar y desarrollarse plenamente. Durante la gestación se produce un gasto metabólico; por ello la dieta debe aportar proteínas, vitaminas y minerales, elementos esenciales para que él bebe crezca adecuadamente. La deficiencia de estos nutrientes puede llevar a la obesidad o desnutrición; siendo como tales un problema grave, que se puede complicar, y a consecuencia su hijo tiene riesgo de morir o de presentar alteraciones. El presente trabajo está basado en los factores que complican la nutrición en pacientes embarazadas que asisten al centro de salud Lucrecia Lindo del municipio de San Ramón. Evaluar la calidad de la medida de datos antropométricos según las normas del programa, para comprobar si se cumplen en los servicios de salud. Estandarizar planes de cuidados según las necesidades nutricionales de la paciente en estudio. El universo lo constituyeron 21 gestantes de las cuales tomamos un grupo conformado por 11 pacientes embarazadas, para esta selección se aplicó un muestreo no probabilístico a conveniencia. Se elaboró un instrumento (encuestas) que consto de 16 ítems dividido de acuerdo a los objetivos de investigación. Se Identificaron que los factores que complican la nutrición en las embarazadas son: factor económico, factor biológico, factor social, factor cultural, también se evaluó la calidad en la toma de datos antropométricos según normas y protocolos, con un resultado no satisfactorio. Se estandarizaron planes de cuidados según las necesidades nutricionales de las pacientes en estudio basándose en el modelo de Virginia Henderso