Browsing by Autor "E. Mamani"

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18va OLIMPIADA BOLIVIANA DE FISICA 8va OLIMPIADA BOLIVIANA DE ASTRONOMIA Y ASTROFÍSICA 1ra ETAPA: UNIDADES EDUCATIVAS 2ra ETAPA: DISTRITAL 3ra ETAPA: DEPARTAMENTAL 4ta ETAPA: FINAL NACIONAL: TARIJA, DEL 14 AL 17 DE AGOSTO DE 2013
(2014) M. Raljevic; Alfredo Augusto Rivera Ticona; E. Mamani; Rodrigo Muñoz; Carlos Vidal Cutimbo Quispe; Lelia Quispe Huamán; Manuela A. Meléndez Balderrama; Marlizete Maldonado Vargas; María De La Torre; F Rodriguez
18va OLIMPIADA BOLIVIANA DE FISICA 8va OLIMPIADA BOLIVIANA DE ASTRONOMIA Y ASTROFÍSICA: 4ta ETAPA: FINAL NACIONAL: TARIJA, DEL 14 AL 17 DE AGOSTO DE 2013
(2015) M Raljevic; Subieta; Rodrigo Muñoz; Carlos David Laura Quispe; E. Mamani; Luis Pavel Palomino Quispe; Manuela A. Meléndez Balderrama; Marcos Josué Rupay Vargas; María De La Torre; F Rodríguez
The 18th Olympiad of Physics Boliviana (18 ?? OBF) and Bolivian 8th Olympiad of Astronomy and Astrophysics (8 ?? obaa) were carried out successfully in 4 stages of management 2013: 1st stage: internal selection tests in each EDUCATIONAL UNIT, 2nd stage, DISTRITAL: simultaneous tests on each of the 277 districts across the country, May 11, 2013, 3rd sTAGE: DEPARTAMENTAL: tests taken at @ s best students in the 2nd stage, June 15 2013 and 4th stage: NATIONAL: where participated only 3 categories: 3rd, 4th and 5th grade. It was held from 14 to 17 August 2013 in the capital city of Tarija with the participation of 9 teams per category for each Olympiad. Both Olympics (OBF - obaa) were coupled for the third consecutive year, the project launched by the Ministry of Education of the Plurinational State of Bolivia, entitled Olympiad Scientific Student Plurinational Boliviana (OCEPB), which was invited to participate 6 areas of pure and natural sciences: Astronomy and Astrophysics, Biology, Physics, Computer science, Mathematics and Chemistry. The organization of the event also included the participation of the following organizations and institutions: Bolivian Olympic Committee for Astronomy and Astrophysics, Bolivian Olympic Committee for Physics, Bolivian Society of Physics (SOBOFI), the Bolivian Association for the Advancement of Science (ABAC) , the Departmental Directorate of Cochabamba; Races Physics at the University Mayor de San Andres (UMSA), the University of San Simon (UMSS), and the Autonomous University Tomas Frias (UATF), the departments of Physics of the Private University of Santa Cruz de la Sierra ( UPSA), the Technical University of Oruro (UTO), the Universidad Mayor, Royal and Pontifical San Francisco Xavier de Chuquisaca (UM-RPSFXCh), the Autonomous University Juan Misael Saracho (UAJMS) and the Association for the Improvement of teaching Sciences (AMEC). It is always advisable to give incentive to all Bolivian youth through motivation and healthy competition in the national event and invite to participate all categories. This continuous and sustained training is accomplished, not only for the next immediate management but with several years in advance; this recipe is definitely the best way to increase awareness in the Bolivian youth and achieve more competitive at international level representations; should spare no resources in the education of the next generation because without doubt is a key to progress towards optimal scientific and technological research investment in the country. L @ s winner @ s of the categories: the 5th, the 4th, the 3rd, 2nd, 1st Secondary & 6th Primary form the Bolivian teams shortlisted candidates for future Olympic events: Latin American, Hispanic American and International to be held the following steps 2014 , 2015, 2016, 2017 and 2018 respectively. Each year the selection must be performed again by testing equipment and in the concentrations prepared by the Academic Committee of each area. The winners of the 6th category Secondary, whose main prize, free entry and direct access to any of the races of Sciences and / or Engineering universities committed to the Olympics. Congratulations! tod @ sl @ s young participants and winner @ s of the different stages and categories as well as their respectiv @ s maestr @ s of all Educational Units tax, individuals and convention from across the country who dared to participate in the exciting world of Physics, Astronomy and Astrophysics, because they are giving a worthy example for other establishments, professor @ s, contemporary students and for all generations to come. Then the test questions the national event presented in the categories of 3rd, 4th and 5th, the 18th of FBOs; solutions in the end, as training material for the reader are also presented. Website: http://www.fiumsa.edu.bo/olimpiada/
Aplicación de biofertilizantes foliares en el cultivar Huaycha (Solanum tuberosum subsp. andigena) en los valles interandinos de Bolivia
(2016) E. Mamani; Víctor Morales; Noel Ortuño
Por la necesidad de disponer tecnología alternativa e inducir a una producción saludable a los pequeños productores, se evaluaron diferentes tipos de biofertilizantes foliares, conocidos como bioles. Se estableció el ensayo en Pocona-Cochabamba (2400 a 3800 m.s.n.m.), utilizando tres biofertilizantes Bioagroec simple, Bioagroec compuesto, Fertisol y un testigo como maneja el agricultor, cada uno combinados con tres aplicaciones . Bajo las condiciones de estudio la altura de la planta de papa se incrementó en un 10 % con el Fertisol, el número de tubérculos se incrementó en 42 % con Bioagroec simple. Asimismo, en el número de tubérculos para la categoría chilimurmu (última categoría en tamaño) fue 50 % más con Bioagroec simple, todos comparados respecto al testigo (sin aplicación). En la frecuencia de aplicación solo se detectó diferencias con la aplicación del Fertisol con tres aplicaciones, el que mejoró el rendimiento en número de tubérculos en la categoría chapara (categoría mayor en tamaño) en 33 % más. El rendimiento en peso se incrementó 45 % al aplicar Bioagroec simple (B2), respecto al testigo (sin aplicación). El rendimiento en peso de tubérculos de tamaño cuarta (penúltima en tamaño) se incrementó 86% con Bioagroec simple, respecto al testigo (sin aplicación). En el análisis económico, el biofertilizante (B2: con dos aplicaciones), reportó los mayores ingresos netos (US$ 1553.638 ha-1) y el menor costo variable (US$ 22.65ha-1). Mostrando una tasa de retorno marginal de 41.81 %.
Effective quantum Hamiltonian for a two-mesh LC circuit with discrete charge: Managing of currents and voltages
(World Scientific, 2022) M. Calcina-Nogales; Diego Sanjinés; E. Mamani
In this paper, we study the dynamics of a quantum two-mesh LC circuit with discrete charge subject to rapidly oscillating voltage sources. A time-independent effective Hamiltonian for this system is derived in a high-frequency series expansion upto [Formula: see text] whose dominant behavior indicates the possibility of observing two physical phenomena: first, the controlled manipulation and suppression of the mesh currents by setting specific values of the voltage source amplitudes and, second, the onset of a DC regime (in the single–mesh case) which could be inferred by interpreting the quasi-degenerate quantum states.
Propagación de estacas de higo (Ficus carica L.) bajo enraizadores naturales en distintos tiempos de sumersión
(2024) E. Mamani
There is a possibility that the time of submersion in natural rooting, with respect to vegetative propagation by fig cuttings, may have a significant effect or differences in the formation and characteristics of the roots. For this reason, the research wascarried out in the Multipurpose Nursery, belonging to the Cota Cota Experimental Centre, under a completely randomised design with factorial arrangement, using a mother plant of more than 12 years old, which is an indication that propagation would be difficult, due to the characteristics of the plant material. The response variables evaluated were: days to root formation, percentage of survival, root length, number of roots, and percentage of lodging. The following results were obtained based on the averages of the data collected in the field research: T9 (lentil water, 48 hours) rooted in 54 days, being the best rooting time. The percentage of survival was influenced by the rooting factor directly, with the natural rooters of lentil water and willow infusion responding much better, with 85.70 and 83.66 % respectively. The rooting and submersion time presented a direct significance in root length, which is equal to 7.60 cm, with treatment 5 (willow infusion, 24 hours). In the variable number of roots, both lentil water and willow infusion achieved 8 and 7 root units respectively, both in a submersion time of 24 hours, and it is also important to note the significance in both factors. Treatment 9 (lentil water, 48 hours) with 90 % was the best average in the variable percent rooting. It was confirmed that the longer the soaking time, the more positive the rooting of the cuttings, depending on the rooting agent used.