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1
artículo
BRACKISH WATER IS AN IMPORTANT SOURCE OF WATER RESOURCES WITH LOWER SALT CONTENT THAN SEAWATER. DESALINATION IS A VERY IMPORTANT TREATMENT TO REMEDY THE SCARCITY OF FRESH WATER THROUGHOUT THE WORLD. IN THIS WORK, IT HAS BEEN PROPOSED TO DESALINATE BRACKISH GROUNDWATER USING A COMMERCIAL NANOFILTRATION MEMBRANE. THE EXPERIMENTS WERE CARRIED OUT ON THE BASIS OF A FACTORIAL DESIGN USING THREE FACTORS AND TWO LEVELS OF STUDY FOR EACH VARIABLE. FOR THIS PURPOSE, IT SELECTED THE FEED PRESSURE (X1) OF THE MEMBRANE MODULE AT (60 AND 100 PSI), FEED WATER SALINITY (X2) AT LEVELS OF (3.4 AND 6.01 MS/CM) AND OPERATING TEMPERATURE (X3) AT LEVELS (20 AND 28 °C) TO EVALUATE ITS EFFECT ON THE PERCENTAGE FLUX RECOVERY AND SALT RETENTION. THE RESULTS SHOWED THAT THE MOST SIGNIFICANT VARIABLE IS THE FEED PRESSURE, ACHIEVING HIGHER FLOW RECOVERY AND THE PERCENTAGE OF SALINITY REJECTION AT THE 100 PSI LEVEL...
2
artículo
Publicado 2024
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A LARGE PART OF THE WORLD'S POPULATION IS SUPPLIED WITH DRINKING WATER FROM SUBWAY SOURCES. DURING THE LAST FEW YEARS, GROUNDWATER NITRATE CONCENTRATIONS HAVE INCREASED CONSIDERABLY. THIS WORK PROPOSES THE REMOVAL OF NITRATES FROM BRACKISH GROUNDWATER AND A MODEL SOLUTION BY ELECTRODIALYSIS. TO EVALUATE THEIR EFFECT ON NITRATE REMOVAL AND ENERGY CONSUMPTION, THREE FACTORS WERE SELECTED WITH THREE LEVELS FOR EACH: NITRATE ION CONCENTRATION (50, 200 AND 500 MG/L), APPLIED ELECTRICAL POTENTIAL (5, 10 AND 15 V) AND FEED FLOW ARRANGEMENT (A, B AND C). THE RESULTS SHOWED THAT THE MOST INFLUENTIAL VARIABLE WAS THE ELECTRICAL POTENTIAL, THE INCREASE OF THE POTENTIAL (15 V) LED TO A CONSIDERABLE INCREASE IN NITRATE REMOVAL (92.5 %). THE BEST CONDITIONS FOR NITRATE REMOVAL FROM THE SYNTHETIC SOLUTION WERE AT AN ELECTRICAL POTENTIAL OF 15 VOLTS, INITIAL NITRATE CONCENTRATION 200 MG/L AND THE FLOW A...
3
objeto de conferencia
Publicado 2017
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPN por restricciones de la casa editorial donde ha sido publicado.
4
artículo
Publicado 2023
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This study delves into the examination of internal flow characteristics within closed (with nozzles) and open-end pressure-swirl atomizers (lacking nozzles). The number of inlet channels “n” and the opening parameter “C” were manipulated in this study, as they play a pivotal role in understanding various atomizer attributes, such as uniformity of the air-core diameter, the discharge coefficient, spray angle, and more, all of which hold significance in the design of bipropellant atomizers for liquid rocket engines (LREs). To validate our findings, six distinct hexahedral meshes were generated using Ansys ICEM software 2023. Subsequently, we employed Ansys Fluent, considering the RNG k-ε turbulence model and the VOF (volume-of-fluid) multiphase model to identify the liquid–gas interface, to aid in analyzing the uniformity of the air core, which is directly linked to the even dis...
5
artículo
Publicado 2003
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La toma de decisiones en el área de emergencia, dada su implicancia ele atención a pacientes en estado de riesgo, es sumamente sensible. Una decisión inadecuada puede hacer la diferencia entre la vida y la muerte. El sistema debe responder rápida, eficiente y eficazmente, y el factor humano médico juega el papel protagonista. Se puede concluir entonces, que la adecuada distribución del potencial humano disponible en el momento de la emergencia, es determinante para brindar una atención adecuada al paciente. En este trabajo se presenta, un modelo que estima las configuraciones adecuadas de los equipos médicos en el área de emergencia, basado en parámetros medidos cuantitativamente por simulación, los cuales son utilizados para estimar la calidad de la atención. Estos parámetros respaldan a cada uno de los requerimientos de la respuesta. Se tienen parámetros basados en el con...
6
objeto de conferencia
Publicado 2018
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPN por restricciones de la casa editorial donde ha sido publicado.
7
tesis de maestría
Publicado 2019
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I would like to thank the National Council of Science, Technology and Technological Innovation (Concytec) from Peru for the award of a scholarship which made it possible to do this research work.
8
tesis de maestría
Publicado 2019
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Semiconductor-insulator interfaces play an important role in the performance of many different electronic and optoelectronic devices such as transistors, LEDs, lasers and solar cells. Particularly, the recombination of photo-generated charge carriers at interfaces in crystalline silicon solar cells causes a dramatic efficiency reduction. Therefore, during the fabrication process, the crystalline silicon must be subjected to prior superficial passivation; typically through an insulating layer such as SiO2, SiNx or AlOx. The function of this passivating layer is to reduce electrical recombination losses in interfacial defect states originating from dangling bonds. The associated passivation parameters are, on the one hand, stable charges within the insulating layer (Qox) that by repelling a certain type of charge carrier from the crystalline silicon surface, reduces its recombination effec...
9
artículo
Publicado 2026
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This study explores the intestinal microbiota of eight 18-month-old male alpacas from two distinct high-altitude regions in Peru: the Wet Puna (4200 m above sea level) and the Dry Puna (4900 m above sea level). Using 16S rRNA and 18S rRNA metabarcoding, microbial communities of bacteria, archaea, fungi, and protists were analyzed from the first compartment of the stomach (C1) to investigate the diversity, taxonomic composition, and correlations with hematological parameters. Significant differences in microbial diversity and composition were observed between regions, driven by dietary and environmental factors. The Wet Puna exhibited greater alpha diversity in bacterial and fungal communities, while beta diversity highlighted distinct microbial compositions. Key taxa, such as Prevotella ruminicola and Acetitomaculum, were associated with energy metabolism and host adaptation, whereas met...
10
tesis de maestría
Publicado 2019
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Semiconductor-insulator interfaces play an important role in the performance of many different electronic and optoelectronic devices such as transistors, LEDs, lasers and solar cells. Particularly, the recombination of photo-generated charge carriers at interfaces in crystalline silicon solar cells causes a dramatic efficiency reduction. Therefore, during the fabrication process, the crystalline silicon must be subjected to prior superficial passivation; typically through an insulating layer such as SiO2, SiNx or AlOx. The function of this passivating layer is to reduce electrical recombination losses in interfacial defect states originating from dangling bonds. The associated passivation parameters are, on the one hand, stable charges within the insulating layer (Qox) that by repelling a certain type of charge carrier from the crystalline silicon surface, reduces its recombination effec...
11
tesis de grado
Publicado 2025
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De acuerdo con la OMS los casos prevalentes de sobrepeso en adultos con 39% y el 13% con obesidad, seguirán aumentando como resultado de los hábitos dietéticos actuales y los estilos de vida sedentarios y una de las estrategias es el estudio del microbioma intestinal, ya que contribuye a la salud humana, donde el vínculo entre la disbiosis y la obesidad ya es conocido. El presente trabajo de investigación secundario con el título revisión crítica: La suplementación con probióticos en pacientes adultos con obesidad reduce parámetros antropométricos, cuya finalidad es determinar los beneficios de suplementar con probióticos en adultos con obesidad. Se realizó la búsqueda con metodología Nutrición Basada en Evidencia (NuBE). La recopilación de datos se realizó en PUBMED, SCIENCE DIRECT, SCIELO, se encontró 41 artículos, pero solo 10 fueron evaluados por la herramienta p...
