We compute the isomorphism class in KKalg of all noncommutative generalized Weyl algebras A D C[h].σ; P /, where σ.h/ D qh C h0 is an automorphism of C[h], except when q ¤ 1 is a root of unity. In particular, we compute the isomorphism class in KKalg of the quantum Weyl algebra, the primitive factors Bλ of U.sl2/ and the quantum weighted projective lines O.W Pq.k; l//. © European Mathematical Society

La presente investigación tuvo como objetivo determinar el impacto del programa de vida ecoeficiente en la mejora de la conciencia ambiental en los estudiantes de tercer año de educación secundaria de la Institución Educativa Artemio del Solar del distrito de Santa, año 2021. Se aplicó el enfoque cuantitativo y la investigación es de tipo aplicada. La población estuvo constituida por 147 estudiantes y la muestra estuvo compuesta por 32 estudiantes de tercer grado de secundaria, sección A, la misma que fue seleccionada mediante un muestreo no probabilístico a criterio del investigador. El diseño empleado fue preexperimental con un grupo de aplicación de pre y posprueba. Los resultados encontrados evidencian que la a aplicación del Programa Vida Ecoeficiente mejoró la conciencia ambiental en los estudiantes de la IE Artemio del Solar.

The present investigation was carried out in the Chonta River, located in the province of Cajamarca, department of Cajamarca-Peru. The work was based on the application of three environmental evaluation techniques that consisted of the determination of heavy metals in sediments, the realization of the Survival Test with Eisenia fetida earthworms and the application of the CERA protocol with macroinvertebrates, with the objective of evaluating the ecological status of the Chonta River in the upper a nd middle parts of the river. To meet this objective, five monitoring stations were established, four control stations (M-1, M-3, M-4, M-5) and one reference station (M-2). In mention, Station M1 sho ws impacts from mining activity. The metals analyzed in sediments were: As, Cd, Pb, Hg, Ni, Zn, Cu and Cr whose results were compared with the threshold values established with the Canadian sedime...

La detección de rostros es una de las tareas esenciales ampliamente estudiadas en el campo de la Visión por Computador. Varios autores han desarrollado diferentes técnicas para mejorar la detección de rostros en imágenes, pero estas se ven limitadas en su aplicación en videos y más si presentan baja resolución. En este estudio, proponemos un nuevo modelo para la detección de rostros en videos de baja resolución basado en la morfología de la parte superior del cuerpo de las personas y el uso de Deep Learning (CNN). Nuestros resultados muestran un promedio de 39 % de precisión en el conjunto de datos de Caviar y 32 % en el conjunto de datos de UCSP. En comparación con otras técnicas, nuestros resultados son mayores debido a que solo alcanzan el 1% de precisión.

At present, worrying quantities of tires are discarded due to the growth in demand for vehicles in the world, which has a direct impact on the deterioration of the environment since they normally go to landfills. Based on the background found, the use of this material for geotechnical applications can help reduce the pollution they generate and improve the physical and mechanical properties of soils. Therefore, this research seeks to evaluate a greater shear strength and capacity of support to the penetration of the clayey soil by means of the addition of 1.5%, 2.5% and 3.5% of rubber powder recycled. For this, the Atterberg limits analysis, the modified proctor compaction test, shear box and CBR were performed. For the shear box test, the results reflect that the cohesion of the mixture increased and the angle of internal friction decreased with respect to the natural soil, resulting in...

Alpacas and llamas play an important role in the livelihood of many rural families in the High Andes of Peru. The census of 2012 indicates a population of 3 million alpacas and 746,269 llamas. Both species are kept in extensive, low-input, pasture-based systems in altitudes between 3800 m and up to 5000 meters above sea level. Smallholders keep mixed herds of sheep, alpaca and llamas as a mitigation strategy against fluctuating market prices. Since 1997 the Peruvian Ministry of Agriculture manages a genealogy registry for alpacas and llamas, but so far the up-take rate by farmers and inscription rate of animals is low. The national research organisation INIA (Instituto Nacional de Innovación Agaria) runs an ex-situ in-vivo conservation program for coloured alpacas (21 different colours) and llamas. INIA is also doing research in the area of embryo transfer, artificial insemination and c...

Los objetivos de este estudio fueron describir el crecimiento de alpacas jóvenes aplicando cuatro no lineales, además se evaluó el efecto ambiental sobre los parámetros de la curva de crecimiento; también se sintieron los parámetros genéticos de la curva de crecimiento y sus respectivos rasgos genéticos. Los datos fueron obtenidos de la estación experimental Quimsachata, (INIA) Perú. Para describir la trayectoria de crecimiento de los animales se aplicaron cuatro modelos no lineales: Brody, Von Bertalanffy, logístico y Gompertz mediante el procedimiento NLIN de SAS. Para evaluar la influencia de los efectos fijos, tales como color, sexo, año de nacimiento y mes de nacimiento en los parámetros de la curva de crecimiento se ha analizado en un diseño completamente aleatorizado utilizando el programa SAS. Los componentes de (co)varianza y los parámetros genéticos se estimaron...

Este trabajo se realizó con el apoyo financiero del Consejo Nacional de Ciencia y Tecnología (CONCYTEC) mediante convenio No. 409-2012-CONCYTEC-OAJ, así como por el convenio No. 541-FIDECOM-INNOVATE PERÚ-PIMEN-2015.

This study provides an in-depth analysis of the experiences of university students who simultaneously balance work and study in a private university in Lima, a growing phenomenon within Latin American higher education. In a context marked by socioeconomic disparities and the increasing privatization of education, this population faces significant tensions that affect their academic, personal, and emotional well-being. The research was conducted using a qualitative approach with a phenomenological design, through structured interviews with three working students selected by convenience sampling. The testimonies were subjected to a manual coding process, considering a priori categories related to their comprehensive experience in university life. The findings show that the dual burden generates high levels of physical fatigue and stress, hindering the fulfillment of academic demands. Howev...

This research was partially funded by CONCYTEC-FONDECYT under the call for proposals E038-01 with contract number: 029-2019-FONDECYT-BM-INC.INV. BOKU- University of Natural Resources and Life Sciences, Vienna kindly provided the chromameter.

We have determined the 50 Lethal dose of the Metanolic extract of Plantago major "Llanten" given by intraperitoneal route. We have found that 50LD was 4000 mg/Kg. Of animal weigtht, using 36 mice divided in six groups with 6 animal s each one. 40 rats divided in four groups of ten animals each one received on the back 2 mI of carragenin 1 % to the air pouch. After 30 minutes, the extract and diclofenac were administered. Six hours afterwards the animal s were killed. The exudate obtained was used to find the leucocyte count in the Coulter Counter. The rest of the material was centrifuged to determine the concentracion of proteins with de Gornall colorimetric method using the Biuret reactive and a model of protein lof 70 g/L. We found the anti-inflammatory properties of the methanolic extract, administered by the intraperitoneal route 400 mg/Kg. and 800mg/Kg and with diclofenac using the ...