Repositorio institucional - Concytec
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Monitoring system based on IEC standards for irradiance and module temperature measurements in photovoltaic systems
No full textMonitoring photovoltaic (PV) systems is necessary to assure their proper functioning. Mostly automated data acquisition systems (DAQ) are used for this purpose. Obtained data from DAQ are important for analysing the energy behavior of PV systems with any anomalies that may appear. It helps investors to realize economic calculations which use to estimate the return on investment. The article aims to present an open-source system that allows the acquisition and reliable recording of meteorological parameters that influence in the energy production of PV installations. The measurement processes were tested by different methods in order to comply with the standards of the International Electrotechnical Commission (IEC). © 2021 Published under licence by IOP Publishing Ltd.Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte
Fabrication and evaluation of the mechanical behavior of geopolymer compounds using waste from the mining and construction industry
No full textGeopolymers are lately being considered a group of revolutionary materials, due to their good mechanical properties, chemical stability, fire resistance and diversity of applications where they can be used. For the synthesis of geopolymers, a great variety of types of natural and artificial raw materials (residues from other industries) can be used, which allows obtaining materials with very specific applications. Two of the most important industries in Peru are also those that generate greater environmental degradation, mainly due to the waste they generate. The mining industry has a negative impact on the environment, generating a large amount of inorganic waste, while the construction industry does the same, generating large amounts of demolition waste. Both, mining and demolition waste, constitute a serious environmental problem, since currently they are only deposited without any alternative use. Therefore, our research proposes the use of geopolymeric technology for the use of mining and demolition waste in the manufacture of geopolymeric concrete with mechanical strengths similar to that of Portland cement concrete. © 2021 Institute of Physics Publishing. All rights reserved.Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte
Complete genome sequence of Halomonas sp. Strain SH5A2, a dye-degrading halotolerant bacterium isolated from the salinas and aguada blanca national reserve in Peru
No full textHalomonas sp. strain SH5A2 is a halotolerant bacterium isolated from Salinas Lake at 4,300 m above sea level in Peru. Here, we report its complete genome sequence with a length of 3,849,224bp and highlight the presence of genes putatively related to dye degradation, such as NADPH-dependent oxidoreductases. © 2021 Manya et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte
EPR response of anhydrite crystal (CaSO4) for dosimetry of gamma photon beams
No full textAn anhydrite (CaSO4) natural sample was studied as possible dosimeter for low and high gamma doses using the technique of electron paramagnetic resonance (EPR). EPR spectrum showed signals due to (SO3)(-), (SO4)(-) radicals and O center. The anhydrite sample was irradiated with gamma rays with low-dose ranges typical for medical therapy (1-20 Gy) up to high-dose of about 70 kGy. The EPR centers due to (SO3)(-) and (SO4)(-) exhibited a linear dose response in the dose range from 1 Gy to 500 Gy, whilst the 0 center presented a supra-linear dose response in the range of 50 to 5 kGy.Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte
Reglamento de calificación, clasificación y registro de los investigadores del Sistema Nacional de Ciencia, Tecnología e Innovación Tecnológica: Reglamento RENACYT
No full textPresenta el Reglamento que tiene por objeto regular el procedimiento para la calificación, clasificación y registro de los investigadores del Sistema Nacional de Ciencia, Tecnología e Innovación Tecnológica – SINACYT en el Perú
CRIS Ulima Sistema de información de la investigación
No full textPresenta los alcances, retos y perpectivas del Sistema CRIS de la Universidad de Lima
Avances y logros en la implementación del Acceso Abierto en el Perú
Get PDFMuestra los principales avances y logros respecto a la implementación del acceso abierto en el Perú con énfasis en el Repositorio Nacional ALICIA
LA Referencia: avances y perspectivas
Get PDFPresenta a la Red Federada de Repositorios Institucionales de Publicaciones Científicas, conocida como LA Referencia así como sus alianzas y recientes avances
Aboveground biomass in secondary montane forests in Peru: Slow carbon recovery in agroforestry legacies
No full textThis work was supported by a CONCYTEC (Peru) -World Bank grant (Contract 011-2019-FONDECYT-BM-INC-INV). In Huayopata we thank the Cuba and Povea families for their hospitality and help during field work.Andean tropical montane forests (TMF) are hotspots of biodiversity that provide fundamental hydrological services as well as carbon sequestration and storage. Agroforestry systems occupy large areas in the Andes but climatic pressures, market volatility and diseases may result inagroforest abandonment, promoting secondary succession. Secondary forests are well-adapted and efficient carbon sinks whose conservation is vital to mitigate and adapt to climate change and to support biodiversity. Little is known, however, about how secondary TMF recover their aboveground biomass (AGB) and composition after abandonment. We established a 1.5 ha plot at 1780 masl on a 30-year old abandoned agroforest and compared it against two control forest plots at similar elevations. Agroforestry legacies influenced AGB leading to far lower stocks (42.3 +/- 5.4-59.6 +/- 7.9 Mg ha(-1) using allometric equations) than those expected after 30 years (106 +/- 33 Mg ha(-1)) based on IPCC standard growth rates for secondary montane forests. This suggests a regional overestimation of mitigation potentials when using IPCC standards. Satellite-derived AGB largely overestimated our plot values (179 +/- 27.3 Mg ha(-1)). Secondary growth rates (1.41-2.0 Mg ha(-1) yr(-1) for DBH >= 10 cm) indicate recovery times of ca. 69 to 97 years to reach average control AGB values (137 +/- 12.3 Mg ha(-1)). This is 26 years above the average residence time of montane forests at our elevation (71 +/- 1.91 years) suggesting a non-recovery or far slower recovery to control AGB values. Three variables appear to define this outcome compared to the control plots: lower DBH (15.8 +/- 5.9 cm vs 19.8 +/- 11.0 cm), lower basal area (12.67 +/- 0.7 vs 28.03 +/- 1.5 m(2) ha(-1)) and higher abundance of lighter-wood tree genera (0.46 +/- 0.10 vs 0.57 +/- 0.11 gr cm(3)) such as Inga, a common shade-tree in Andean agroforests. With 3.2 million hectares committed to restoration, Peru needs to target currently neglected TMF recovery schemes to support biodiversity, water and carbon storage and fulfill its international commitments.Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concyte
Changes in the Oral Health-Related Quality of Life in Infants With Cleft Lip and/or Palate Before and After Surgical Treatment
No full textThe author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The principal author Lopez Ramos, Roxana Patricia is a doctoral student studying an Epidemiological Research Doctorate at Universidad Peruana Cayetano Heredia under FONDECYT/CIENCIAACTIVA scholarship EF033-235-2015 and supported by training Grant D43 TW007393 awarded by the Fogarty International Center of the US National Institutes of Health.Objective: To assess oral health-related quality of life (OHRQoL) changes before and after the primary surgical treatment in infants with cleft lip and/or palate (CL/P). Design: Quasi-experimental study. Methods: A total of 106 infants with CL/P younger than 2 years undergoing primary surgical treatment in the Plastic Surgery Service of the Instituto Nacional de Salud del Nino in Peru. The parent/caregiver answered a questionnaire about OHRQoL named the Peruvian version of the Early Childhood Oral Health Impact Scale (P-ECOHIS) in the pretreatment (baseline) and follow-up post-treatment. The total score of P-ECOHIS and their 2 sections (child impact and family impact) in the baseline and each follow-up period post-treatment scores were assessed. As well as, the type of the CL/P on OHRQoL, standardized effect sizes (ES) based on mean total change scores (difference between baseline and 12th month) were analyzed. Results: Improvements in infant's OHRQoL after treatment were reflected in each follow-up period P-ECOHIS score compared to the baseline score. The total P-ECOHIS scores decreased significantly from 28.07 (baseline) to 7.7 (12th month; P < .0001), as did the individual domain scores (P < .0001). There were significant differences in the baseline and follow-up post-treatment scores of infants who reported improvement of the OHRQoL (P < .0001). The ES was large (3.79). The cleft lip had an improvement in the OHRQoL at 12th month post-treatment (P < .0001). Conclusions: Primary surgical post-treatment resulted in significant improvement of the infant's OHRQoL with CL/P.Fondo Nacional de Desarrollo Científico y Tecnológico - Fondecy