2.1 Estudios de doctorado y postdoctorado

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https://hdl.handle.net/20.500.12390/329

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  • Publicación
    Efecto del germinado sobre las características nutricionales,propiedades bioactivas y funcionales de basul (Erythrina edulis)
    (Sociedad Latinoamericana de Nutrición, 2021)
    Vilcanqui-Pérez, Fulgencio
    ;
    Chaquilla-Quilca, Guadalupe
    ;
    Sarmiento-Casavilca, Víctor Hugo
    ;
    Céspedes-Orosco, Candy Naya
    ;
    Ventura-Saldívar, Yeni
    ;
    Cortés-Avendaño, Paola
    El objetivo del presente trabajo fue evaluar el efecto de las diferentes condiciones de germinado sobre los valores nutricionales, los compuestos fenólicos totales, la actividad antioxidante y las propiedades funcionales en las semillas de basul.
  • Publicación
    Obtaining the ideal smoked bacon: What is the influence of the product space and multivariate procedure to construct the external preference mapping?
    (SciELO, 2019)
    Saldana, E
    ;
    Martins, MM
    ;
    Menegali, BS
    ;
    Selani, MM
    ;
    Contreras-Castillo, CJ
    Identifying the ideal product is the most important step in new product development and improvement of existing ones. The aim of this study was to identify the ideal smoked bacon using PrefMFA and PrefMap considering three different sensory spaces obtained via descriptive analysis (DA), projectivemapping (PM) and CATA questions. Six smoked bacons were characterized by ten trained assessors using DA, and by two consumers panel using PM (n=93) and CATA questions (n=100). Also, one hundred consumers indicated their overall liking using a nine-point hedonic scale. The results showed that both techniques identified an ideal product. However, the sensory method has a greater effect than the multivariate procedure to obtain the sensory spaces prior to the preference mapping. Subsequent studies with other food matrices are still necessary in order to generalize our results.
  • Publicación
    High-Elevation Monsoon Precipitation Processes in the Central Andes of Peru
    (American Geophysical Union (AGU), 2020)
    Chavez, S. P.
    ;
    Silva, Y.
    ;
    Barros, A. P.
    Measurements at the high-elevation Lamar Observatory in the Mantaro Valley (MV) in the Central Andes of Peru demonstrate a diurnal cycle of precipitation characterized by convective rainfall during the afternoon and nighttime stratiform rainfall with embedded convection. Wet season data (2016-2018) reveal long-duration (6-12 hr) shallow precipitating systems (LDPS) that produced about 17% of monsoon rainfall in 2016 and 2018 associated with El Nino and La Nina, respectively. The LPDS fraction of monsoon rainfall doubles to 35% with weekly recurrence in 2017 under El Nino Costero (coastal) conditions. LDPS occur under favorable moisture conditions dictated by the South America (SA) Low-Level Jet (SALLJ) and Cold Air Intrusions (CAIs). Backward trajectory analysis shows that precipitable water sustains >80% of seasonal precipitation and ties the LPDS to particular moisture source regions in the eastern Andes foothills 1-2 days in advance, enhanced by increased moisture supply in the midtroposphere. Higher frequency of CAIs and enhanced midlevel moisture convergence along CAI fronts explain the increased LDPS frequency during the 2017 El Nino Costero. These findings highlight the functional role of the Andes morphology in organizing moisture supply to high-elevation precipitation systems on the orographic envelope. Analysis of the Global Precipitation Measurement (GPM) mission satellite-based radar observations points to challenges to precipitation detection and estimation in this region as the GPM clutter-free height (similar to 1-2 km AGL) exceeds the depth of shallow precipitation systems in the MV.
  • Publicación
    Methods of Extracting the Point of Maximum Power (MPPT) in Photovoltaic Systems, an Evaluation with the Entropy of Shannon
    (Institute of Electrical and Electronics Engineers Inc., 2018)
    Arredondo J.
    ;
    Luyo J.E.
    In this article is evaluates the different tracking and search methods of the maximum power point (MPPT) in photovoltaic solar systems (PV), these methods are very extensive and use different algorithms, some of them based on artificial intelligence between others with the objective of finding the MPPT in a PV system consisting of a solar panel accompanied by a direct current to direct current (DC-DC) converter. There are five wellknown algorithms that find the MPPT with their respective characteristics, and are assigned rating values using the Entropy method by weight (EW) based on the Shannon Entropy; in the end of this work, is it gets a table of scores of these methods.
  • Publicación
    A note on the zeros of approximations of the Ramanujan Ξ -function
    (Springer, 2020)
    Chirre A.
    ;
    Castañón O.V.
    In this paper we review the study of the distribution of the zeros of certain approximations for the Ramanujan Ξ -function given by Ki (Ramanujan J 17(1):123–143, 2008), and we provide new proofs of his results. Our approach is motivated by the ideas of Velásquez (J Anal Math 110:67–127, 2010) in the study of the zeros of certain sums of entire functions with some condition of stability related to the Hermite–Biehler theorem. © 2020, The Author(s).