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1
artículo
Publicado 2015
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Projected future trends in water availability are associated with large uncertainties in many regions of the globe. In mountain areas with complex topography, climate models have often limited capabilities to adequately simulate the precipitation variability on small spatial scales. Also, their validation is hampered by typically very low station density. In the Central Andes of South America, a semi-arid high-mountain region with strong seasonality, zonal wind in the upper troposphere is a good proxy for interannual precipitation variability. Here, we combine instrumental measurements, reanalysis and paleoclimate data, and a 57-member ensemble of CMIP5 model simulations to assess changes in Central Andes precipitation over the period AD 1000-2100. This new database allows us to put future projections of precipitation into a previously missing multi-centennial and pre-industrial context....
2
tesis de grado
Publicado 2025
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En la actualidad, tanto a nivel mundial (OMS) como en el Perú (INEI) se ha evidenciado que el índice de vida ha aumentado a lo largo de los años identificando una necesidad de la atención y servicio hacia el adulto Mayor. Además, hoy en día en el Perú se ha evidenciado un déficit de residencias para adultos mayores, por lo que es de gran importancia la implementación y creación de espacios nuevos y modernos que se adapten y satisfagan las necesidades de la población adulta mayor limeña. En el presente trabajo en los capítulos: Usuario, Déficit y Lugar, se investigará y evidenciará la carencia de Residencias Geriátricos en el Perú, y en los capítulos: Tipología y Referentes Arquitectónicos, se profundizará en las tendencias arquitectónicas internacionales y nacionales que estas Residencias Geriátricas deben tener para ofrecer la mejor experiencia a los usuarios, co...
3
artículo
Publicado 2025
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The Mandinga Coastal Lagoon System (MCLS) is in central Veracruz, Mexico. Over the last two decades, an ambitious development project named the Riviera Veracruzana has been implemented, aggravating existing socio-ecological problems. The study analyzed the socio-ecological scenario in this system, characterizing the socio-ecological problems and the social actors involved based on their perceptions, interests and power relations. A two-track methodological scheme was used: (1) collection of information from secondary sources associated with the MCLS and (2) ethnographic data collection with primary sources through semi-structured interviews with key social actors from different social sectors, participatory workshops with focus groups and a field diary. The results revealed a perception of high environmental degradation, socio-ecological conflicts surrounding the conservation and use of ...
4
artículo
Publicado 2016
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This work was supported by the Fermi National Accelerator Laboratory under U.S. Department of Energy Contract No. DE-AC02-07CH11359 which included the MINERvA construction project. Construction support was also granted by the United States National Science Foundation under Award No. PHY-0619727 and by the University of Rochester. Support for participating scientists was provided by NSF and DOE (U.S.A.), by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by CONICYT (Chile), by CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru), and by Latin American Center for Physics (CLAF). We thank the MINOS Collaboration for use of its near detector data. We acknowledge the dedicated work of the Fermilab staff responsible for the operation and maintenance of the beam line and detector, and we thank the Fermilab Computing Division for support of data processing.
5
artículo
Publicado 1991
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The article presents considerations on the advantages of Parliamentary regimes over presidential and semi-presidential ones, in relation with the preservation of democratic systems. However, in the specific case of Peru, it does not seek to demonstrate that, if such a regime were adopted, it would constitute the most advisable option, nor that the forceful overthrowing of democratic governments will be avoided. Rather, it is claimed that parliamentary regimes provide a more flexible framework for resolving political crises, and therefore diminish the likelihood of the disruption of democracy.
6
artículo
Desde el Sur, a journal edited by the General Courses Coordination of Universidad Científica del Sur (UCSUR), is a peer-reviewed semi-annual publication. It features previously unpublished research articles from all over the world in the fields of humanities and social sciences, preferably with a focus on Latin American issues. Desde el Sur is distributed free of charge in both its printed and online versions.
7
artículo
Publicado 2019
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A neural network is a mathematical model that is able to perform a task automatically or semi-automatically after learning the human knowledge that we provided. Moreover, a Convolutional Neural Network (CNN) is a type of neural network that has shown to efficiently learn tasks related to the area of image analysis, such as image segmentation, whose main purpose is to find regions or separable objects within an image. A more specific type of segmentation, called semantic segmentation, guarantees that each region has a semantic meaning by giving it a label or class. Since CNNs can automate the task of image semantic segmentation, they have been very useful for the medical area, applying them to the segmentation of organs or abnormalities (tumors). This work aims to improve the task of binary semantic segmentation of volumetric medical images acquired by Magnetic Resonance Imaging (MRI) usi...
8
artículo
Publicado 2010
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El lindano es un plaguicida organoclorado cuya toxicidad produce efectos nocivos en la salud humana y la biota. El objetivo de este estudio fue evaluar la toxicidad aguda y crónica del lindano sobre el microcrustáceo Ceriodaphnia cornuta. Para las pruebas agudas se empleó un diseño estático, usando 10 neonatos ≤ 24 horas de edad para el control y para cada concentración de lindano (5, 10, 15, 20 y 25 mg/L). Se realizaron tres réplicas de cada tratamiento. Se controló la inmovilización de los individuos a las 48 hs y se calcularon los valores de CL50. Los bioensayos crónicos consistieron en un diseño semi-estático, utilizando 10 neonatos menores de 24 horas de edad (uno por recipiente) para el control y para cada concentración subletal del tóxico (0,1; 0,15; 0,2; 0,25 y 0,3 mg/L). Se evaluaron los efectos sobre la supervivencia y reproducción durante 21 días. El valor ob...
9
artículo
Publicado 2010
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Lindane is an organochlorine pesticide toxicity which produces harmful effects on human health and biota. The aim of this study was to evaluate the acute and chronic toxicity of Lindane on microcrustaceans Ceriodaphnia cornuta. For acute tests used a static design, using 10 infants ≤ 24 hours of age for control and each concen- tration of lindane (5, 10, 15, 20 and 25 mg/L). There were three replicates of each treatment. Monitored the detention of individuals at 48 am and calculated LC50 values. Chronic Bioassays consisted of a semi-static design, using 10 infants ≤ 24 hours of age (one per vessel) for the control and each of the toxic sublethal concentration (0.1, 0.15, 0.2, 0.25 and 0.3 mg/L). The effects on survival and reproduction over 21 days. The LC50 value of 48 hours was 5.293 ± 0.7 mg/L. Reproductive parameters (neonates per female, litter size and rate of natural increase...
10
artículo
Publicado 2025
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The Mandinga Coastal Lagoon System (MCLS) is in central Veracruz, Mexico. Over the last two decades, an ambitious development project named the Riviera Veracruzana has been implemented, aggravating existing socio-ecological problems. The study analyzed the socio-ecological scenario in this system, characterizing the socio-ecological problems and the social actors involved based on their perceptions, interests and power relations. A two-track methodological scheme was used: (1) collection of information from secondary sources associated with the MCLS and (2) ethnographic data collection with primary sources through semi-structured interviews with key social actors from different social sectors, participatory workshops with focus groups and a field diary. The results revealed a perception of high environmental degradation, socio-ecological conflicts surrounding the conservation and use of ...
11
artículo
Publicado 2021
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Incentive-based conservation has gained ample notoriety over recent decades, particularly across Latin America where targeted incentives feature prominently in environmental services initiatives, such as for carbon storage or watershed regulation. Here we first develop an analytical framework for assessing the Peruvian initiatives of conservation incentives. We then identify six ongoing interventions that have introduced incentives conditional upon compliance with voluntary environmental commitments. We collected information from secondary sources and conducted semi-structured interviews with thirty national- and local-level stakeholders. We scrutinized the extent to which such initiatives featured impact-oriented design and implementation elements, as typically recommended in the state-of-the-art literature on Payment for Environmental Services (PES) and Reducing Emissions from Deforest...
12
artículo
Publicado 2023
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The systems intended to evaluate absolute pitch (AP) display a high variability regarding their configuration, which could be attributed to the complex definition of the concept. Also, studies delving into the effects that AP produces in music activities are rare, and usually with contradictory results. The current study is aimed to inquire into the AP evaluation systems and the self-perception of a group composed of 23 professional-grade music students with such profile to understand (a) the intensity of the practice of different music activities (memorization, improvisation, sight-reading, transposition, intonation, intervals identification and dictation), (b) the behavior of their musical hearing when performing them and (c) the influence that AP exerts over the performance of the aforementioned activities. In a previous study students undertook an AP test to classify them (partial, s...
13
artículo
In Peru, information on the biotechnological potential of native fungi for the degradation of cellulose presents few records. This work aimed to evaluate the cellulolytic activity of isolated fungi in the departments of Cajamarca, Lima, Junín and Huánuco. 289 species of fungi were subjected to reactivation after a conservation period of 7 years using filter paper and Czapeck broth, evaluated semi-quantitatively using the radial diffusion technique on Czapeck Na-CMC agar to then select five strains that were morphologically identified and its cellulolytic capacity was also determined by the Somogyi-Nelson method. 90% (260) of the fungi that underwent semi-quantitative evaluation were reactivated, selecting five strains for their greater clearance area: 14.9, 12.5, 12.0, 14.4 and 12.7 x 102 mm2; SA 726 (Paecilomyces sp), SA 668 (Paecilomyces sp), SA 651 (Paecilomyces sp), SA 683 (Fusariu...
14
tesis de maestría
Publicado 2023
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El problema social relevante identificado consiste en la baja calidad de vida de familias cajamarquinas encabezadas por madres solas que no han tenido oportunidad de realizar estudios superiores y con ello presentan un bajo nivel de empleo adecuado e ingresos insuficientes. La solución propuesta es la creación de Ópalos Peruanos, empresa que busca brindar capacitación y certificación gratuita en el tallado de alta calidad de la piedra semipreciosa, que lleva el nombre de la empresa, de la mano con una oportunidad laboral adecuada. Para validar las hipótesis, se realizaron entrevistas y encuestas con usuarios potenciales de nuestro país y del extranjero, obteniendo los siguientes resultados: más del 80% de los usuarios estaría dispuesto a comprar una joya con ópalo andino tallado artesanalmente; el promedio ponderado de los usuarios estaría dispuesto a pagar un precio promedio ...
15
tesis de maestría
Publicado 2020
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People with deafness or hearing disabilities who aim to use computer based systems rely on state-of-art video classification and human action recognition techniques that combine traditional movement pat-tern recognition and deep learning techniques. In this work we present a pipeline for semi-automatic video annotation applied to a non-annotated Peru-vian Signs Language (PSL) corpus along with a novel method for a progressive detection of PSL elements (nSDm). We produced a set of video annotations in-dicating signs appearances for a small set of nouns and numbers along with a labeled PSL dataset (PSL dataset). A model obtained after ensemble a 2D CNN trained with movement patterns extracted from the PSL dataset using Lucas Kanade Opticalflow, and a RNN with LSTM cells trained with raw RGB frames extracted from the PSL dataset reporting state-of-art results over the PSL dataset on signs c...
16
tesis de grado
Publicado 2003
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En el presente trabajo de investigación, se mejoró la sensibilidad del método desarrollado para la detección de poblaciones de Ralstonia solanacearum en suelo naturalmente infestado. La efectividad de la etapa de enriquecimiento en un nuevo caldo semi-específico desarrollado en el Centro Internacional de la Papa (CIP), permitió incrementar la población bacteriana hasta límites detectables, logrando la semi-cuantificación de las mismas y la detección de niveles tan bajos como 16 cél/g suelo (80 cél/g suelo en promedio). La técnica de inmunoabsorción con conjugado enzimático del tipo sándwich de doble anticuerpo (ELISA-DAS) post-enriquecimiento, ha sido evaluada utilizando muestras de suelo de la rizósfera de plantas con síntomas de Marchitez Bacteriana de la papa (con altos niveles poblacionales) y desde allí en muestras distantes cada 15 cm. y en muestras de plantas ci...
17
tesis de maestría
El presente estudio tiene como objetivo identificar las principales variables de mercado que afectan los resultados financieros de las empresas siderúrgicas locales. Además, de evaluar las tendencias y proyecciones de estas variables con el fin de evaluar mecanismos de control para mitigar el riesgo asociado a la volatilidad de sus precios, a través de coberturas utilizando derivados financieros. Durante los últimos años el sector siderúrgico ha enfrentado un escenario de mayor competencia, debido a la fragmentación del mercado y la sobre capacidad productiva instalada a nivel global. Esto ha impulsado una reducción de los precios de los productos derivados del acero, lo que ha contraído los márgenes de las empresas del sector. A nivel local, Aceros Arequipa ha tenido una utilidad neta sobre ventas de 9.7% en 2011, 2.7% en 2012, 1.1% en 2013 y 2.84% en 2014; mientras que Siderp...
18
artículo
The purpose of this article is to identify the role of media technology development in the economy. In this study, 30 experts in the field of media were used as a sample. The research method is qualitative. Since in this research, there was a need to address the depth of the subject and a deep and comprehensive understanding of media experts, for this reason, the interview method was used. In order for the interviews to have a specific structure, semi-structured interviews have been used. Data were also analyzed through content analysis using maxqda software. In this study, 23 effective factors that determine the positive and negative role of media technologies in the economy were identified, including: information production and increasing economic knowledge, more employment, consumer welfare, reducing economic inequality, reducing political risk, increasing Economic security and effici...
19
artículo
The purpose of this article is to identify the role of media technology development in the economy. In this study, 30 experts in the field of media were used as a sample. The research method is qualitative. Since in this research, there was a need to address the depth of the subject and a deep and comprehensive understanding of media experts, for this reason, the interview method was used. In order for the interviews to have a specific structure, semi-structured interviews have been used. Data were also analyzed through content analysis using maxqda software. In this study, 23 effective factors that determine the positive and negative role of media technologies in the economy were identified, including: information production and increasing economic knowledge, more employment, consumer welfare, reducing economic inequality, reducing political risk, increasing Economic security and effici...
20
tesis de maestría
Publicado 2024
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El presente estudio de investigación tuvo como objetivo analizar las percepciones de los docentes del área de educación física sobre su formación continua en un colegio particular de San Miguel – Lima. Para ello, se comienza con los diversos aportes en definición sobre formación continua docente y características de la misma, de ello se derivan los contextos de aprendizaje donde es posible realizar la formación continua una vez terminada la etapa universitaria. En ese sentido, se procedió a explicar las razones que permiten pueda desarrollarse la formación continua docente. Además, ello permitió conocer los diferentes modelos de formación continua y experiencias en la educación física en Latinoamérica y España. Este estudio se abordó desde un enfoque cualitativo utilizando el método de corte fenomenológico. Para el recojo de información se empleó la entrevista se...
