5.1 Proyectos de Innovación y transferencia tecnológica

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https://hdl.handle.net/20.500.12390/380

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Examinando 5.1 Proyectos de Innovación y transferencia tecnológica por Título

  • Publicación
    3D-printed hand orthotics for the management of spasticity in cerebral palsy
    (Springer Nature, 2018-02-02)
    Moscoso-Porras, Miguel
    Cerebral palsy is a highly debilitating disorder that results from brain damage during development or birth. It can cause motor and language disabilities. Spasticity is one common complication of cerebral palsy which makes movement of upper and lower limbs difficult and often causes joint deformities. To manage spasticity, less intrusive recommendations include the use of hand orthotics. However, in resource-constrained areas, orthotics are often unaffordable and poorly constructed. 3D-printed orthotics could provide an innovative solution, as they utilize high precision manufacturing with low-cost materials. The aim of this study is to determine whether 3D printed orthotics are as effective as conventional orthotics at preventing hand deformities in children with cerebral palsy.
  • Publicación
    A methodology for managing public spaces to increase access to essential goods and services by vulnerable populations during the COVID-19 pandemic
    (Emerald Group Holdings Ltd., 2021)
    Regal Ludowieg A.
    ;
    Ortega C.
    ;
    Bronfman A.
    ;
    Rodriguez Serra M.
    ;
    Chong M.
    Purpose: The purpose of this paper is to present a spatial decision support system (SDSS) to be used by the local authorities of a city in the planning and response phase of a disaster. The SDSS focuses on the management of public spaces as a resource to increase a vulnerable population’s accessibility to essential goods and services. Using a web-based platform, the SDSS would support data-driven decisions, especially for cases such as the COVID-19 pandemic which requires special care in quarantine situations (which imply walking access instead of by other means of transport). Design/methodology/approach: This paper proposes a methodology to create a web-SDSS to manage public spaces in the planning and response phase of a disaster to increase the access to essential goods and services. Using a regular polygon grid, a city is partitioned into spatial units that aggregate spatial data from open and proprietary sources. The polygon grid is then used to compute accessibility, vulnerability and population density indicators using spatial analysis. Finally, a facility location problem is formulated and solved to provide decision-makers with an adaptive selection of public spaces given their indicators of choice. Findings: The design and implementation of the methodology resulted in a granular representation of the city of Lima, Peru, in terms of population density, accessibility and vulnerability. Using these indicators, the SDSS was deployed as a web application that allowed decision-makers to explore different solutions to a facility location model within their districts, as well as visualizing the indicators computed for the hexagons that covered the district’s area. By performing tests with different local authorities, improvements were suggested to support a more general set of decisions and the key indicators to use in the SDSS were determined. Originality/value: This paper, following the literature gap, is the first of its kind that presents an SDSS focused on increasing access to essential goods and services using public spaces and has had a successful response from local authorities with different backgrounds regarding the integration into their decision-making process. © 2021, Emerald Publishing Limited.
  • Publicación
    A new species of Monodelphis (Mammalia: Didelphimorphia: Didelphidae) from the montane forests of central Peru
    (BioOne, 2012)
    Solari, S
    ;
    Pacheco, V
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    Vivar, E
    ;
    Emmons, LH
    With more than 20 recognized species, Monodelphis is the most species-rich genus of living Didelphidae. Recent research on these opossums revealed additional species from Perú and Venezuela, and herein we describe a new species from the montane forests of the eastern slope of the central Andes in Perú.
  • Publicación
    A nonlinear model to estimate Nitrogen level in agricultural soil using Gaussian Kernels
    (IEEE, 2016)
    Sanchez-Mora, K
    ;
    Zuniga-Gutierrez, MA
    ;
    Mayhua-Lopez, E
    Nitrogen fertilizers are commonly used to improve agricultural productivity. However, its excessive use may cause or lead to environmental problems. Therefore, technologies capable of monitoring and measure levels of nitrogen in agricultural soil in-situ and in real time are required in order to make efficient the use of fertilizers. Nitrogen levels are usually measured by direct and indirect methods. Direct methods can be conducted in-situ or in laboratory, but they are really expensive and/or little resistant to soil conditions.
  • Publicación
    A parametric 3D-printed body-powered hand prosthesis based on the four-bar linkage mechanism
    (Institute of Electrical and Electronics Engineers Inc., 2018)
    Bustamante M.
    ;
    Vega-Centeno R.
    ;
    Sánchez M.
    ;
    Mio R.
    The widespread of 3D-printing technology has resulted in the appearance of many open-source prosthetic hand models, especially for partial hand amputations. However, most of these designs are not editable and while some are parametric to some degree, customization for every user is limited to scaling the size of a base design. As consequence, most prostheses fail to closely match the user specific anthropometry and have poor aesthetics, which could result in abandonment of the device. Furthermore, achieving a high degree of customization could be a time-consuming task and requires previous knowledge of CAD design. This work presents a prosthetic hand easy to customize by changing parametric dimensions of the finger phalanges and palm on an Excel sheet. Additionally, the design tackles common issues from previous 3D-printed body-powered prosthetic hands by incorporating new features such as the use of linkages instead of cables as finger flexors and a new cable-adjusting system which requires no additional tools and makes the tensioning of finger tendons easier and quicker.
  • Publicación
    Analysis of Hydrodynamic Patterns and Suspended Sediment Transport in the Virrilá Estuary-Peru
    (American Society of Civil Engineers (ASCE), 2018)
    Yoch P.
    ;
    Christian F.
    ;
    Emanuel G.
    ;
    Leo G.
    ;
    Carlos A.C.
    ;
    Jorge D.A.
    As of today the Virrilá Estuary located in Piura, Peru, is polluted with high nitrate and chlorine concentrations. Because of that the mariculture activity of the towns and cities located in that estuary are significantly affected (which is the basis of their economy). Recent field measurements indicate that the nitrate concentrations are related to the suspended sediment concentrations whereas the chlorine distribution is directly associated with the flow recirculation patterns. In order to shed light on the transport dynamics of these contaminants a two-dimensional shallow water equations numerical model that can predict suspended sediment transport and flow recirculation was developed.
  • Publicación
    Analysis of Possible Triggering Mechanisms of Severe Thunderstorms in the Tropical Central Andes of Peru, Mantaro Valley
    (MDPI, 2019-06-01)
    Flores Rojas, José Luis
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    Moya Álvarez, Aldo Saturnino
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    Kumar, Shailendra
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    Martínez Castro, Daniel
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    Villalobos Puma, Elver Edmundo
    ;
    Silva Vidal, Yamina
    The aim of the present study is to analyze the triggering mechanisms of three thunderstorms (TSs) associated with severe rainfall, hail and lightening in the tropical central Andes of Peru, specifically above the Huancayo observatory (12.04 ∘ S, 75.32 ∘ W, 3313 m a.s.l.) located in the Mantaro valley during the spring-summer season (2015–2016).
  • Publicación
    Approximate nearest neighbors by deep hashing on large-scale search: Comparison of representations and retrieval performance
    (IEEE, 2017-11)
    Ocsa, Alexander
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    Huillca, Jose Luis
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    Coronado, Ricardo
    ;
    Quispe, Oscar
    ;
    Arbieto, Carlos
    ;
    Lopez, Cristian
    The growing volume of data and its increasing complexity require even more efficient and faster information retrieval techniques. Approximate nearest neighbor search algorithms based on hashing were proposed to query high-dimensional datasets due to its high retrieval speed and low storage cost. Recent studies promote the use of Convolutional Neural Network (CNN) with hashing techniques to improve the search accuracy.
  • Publicación
    Article analysis of extreme meteorological events in the central andes of peru using a set of specialized instruments
    (MDPI AG, 2021)
    Flores-Rojas, J. L.
    ;
    Silva Y.
    ;
    Suárez-Salas L.
    ;
    Estevan R.
    ;
    Valdivia-Prado J.
    ;
    Saavedra M.
    ;
    Giraldez L.
    ;
    Piñas-Laura M.
    ;
    Scipión D.
    ;
    Milla M.
    ;
    Kumar, S.
    ;
    Martinez-Castro D.
    A set of instruments to measure several physical, microphysical, and radiative properties of the atmosphere and clouds are essential to identify, understand and, subsequently, forecast and prevent the effects of extreme meteorological events, such as severe rainfall, hailstorms, frost events and high pollution events, that can occur with some regularity in the central Andes of Peru. However, like many other Latin American countries, Peru lacks an adequate network of meteorological stations to identify and analyze extreme meteorological events. To partially remedy this deficiency, the Geophysical Institute of Peru has installed a set of specialized sensors (LAMAR) on the Huancayo observatory (12.04◦ S, 75.32◦ W, 3350 m ASL), located in the Mantaro river basin, which is a part of the central Andes of Peru, especially in agricultural areas. LAMAR consists of a set of sensors that are used to measure the main atmosphere and soil variables located in a 30-meter-high tower. It also has a set of high-quality radiation sensors (BSRN station) that helps measure the components of short-wave (SW) (global, diffuse, direct and reflected) and long-wave (LW) (emitted and incident) irradiance mounted in a 6-meter-high tower. Moreover, to analyze the microphysics properties of clouds and rainfall, LAMAR includes a set of profiler radars: A Ka-band cloud profiler (MIRA-35c), a UHF wind profiler (CLAIRE), and a VHF wind profiler (BLTR), along with two disdrometers (PARSIVEL2) and two rain gauges pluviometers. The present study performs a detailed dynamic and energetic analysis of two extreme rainfall events, two intense frost events, and three high-pollution events occurring on the Huancayo observatory between 2018 and 2019. The results show that the rainfall events are similar to the 1965–2019 climatological 90th percentile of the daily accumulated rainfall. The results also highlighted the patterns of reflectivity in function of height for both events, which is measured by highlighting the presence of convective and stratiform rainfall types for both events. The first intense rainfall event was associated with strong easterly circulations at high levels of the atmosphere, and the second one was associated with the presence of strong westerly circulations and the absence of BH-NL system around the central Andes. The first frost event was mainly associated with continuous clear sky conditions in the few previous days, corresponding to a radiative frost event. The second one was mainly associated with the intrusion of cold surges from extra-tropical South America. For both events, the energy budget components were strong-lower in comparison to the mean monthly values during early morning hours. Finally, for the high pollution events, the study identified that the main source of aerosols were the forest fires that took place in Peru with certain contributions from the fires in the northern area of Bolivia. © MDPI AG. All rights reserved.
  • Publicación
    Automatic classification of pediatric pneumonia based on lung ultrasound pattern recognition
    (Public Library of Science, 2018)
    Correa M.
    ;
    Zimic M.
    ;
    Barrientos F.
    ;
    Barrientos R.
    ;
    Román-Gonzalez A.
    ;
    Pajuelo M.J.
    ;
    Anticona C.
    ;
    Mayta H.
    ;
    Alva A.
    ;
    Solis-Vasquez L.
    ;
    Figueroa D.A.
    ;
    Chavez M.A.
    ;
    Lavarello R.
    ;
    Castañeda B.
    ;
    Paz-Soldán V.A.
    ;
    Checkley W.
    ;
    Gilman R.H.
    ;
    Oberhelman R.
    Pneumonia is one of the major causes of child mortality, yet with a timely diagnosis, it is usually curable with antibiotic therapy. In many developing regions, diagnosing pneumonia remains a challenge, due to shortages of medical resources. Lung ultrasound has proved to be a useful tool to detect lung consolidation as evidence of pneumonia. However, diagnosis of pneumonia by ultrasound has limitations: it is operator-dependent, and it needs to be carried out and interpreted by trained personnel. Pattern recognition and image analysis is a potential tool to enable automatic diagnosis of pneumonia consolidation without requiring an expert analyst. This paper presents a method for automatic classification of pneumonia using ultrasound imaging of the lungs and pattern recognition.
  • Publicación
    Automatic detection of pneumonia analyzing ultrasound digital images
    (IEEE, 2016)
    Barrientos, R
    ;
    Roman-Gonzalez, A
    ;
    Barrientos, F
    ;
    Solis, L
    ;
    Correa, M
    ;
    Pajuelo, M
    ;
    Anticona, C
    ;
    Lavarello, R
    ;
    Castaneda, B
    ;
    Oberhelman, R
    ;
    Checkley, W
    ;
    Gilman, RH
    ;
    Zimic, M
    Pneumonia is one of the major causes of child mortality. Unfortunately, in developing countries there is a lack of infrastructure and medical experts in rural areas to provide the required diagnostics opportunely. Lung ultrasound echography has proved to be an important tool to detect lung consolidates as evidence of pneumonia.
  • Publicación
    Caracterización de la dinámica oceánica de la costa peruana bajo diferentes escenarios de esfuerzo de vientos
    (Universidad Nacional Mayor de San Marcos, 2018)
    Ticse De la Torre, Katerine Elsy
    La dinámica oceánica de la costa peruana se mantiene gracias a la configuración espaciotemporal del esfuerzo de vientos, que genera y modula procesos físicos importantes como el afloramiento costero. El presente trabajo realiza un análisis de sensibilidad asociado al aumento o disminución del esfuerzo de vientos a fin de analizar los cambios en la estructura de la columna de agua frente a la costa peruana, específicamente a la región comprendida entre los 6°S a 15°S y 75°W a 85°W.
  • Publicación
    Caracterización geológica, mineralógica y geoquímica de las alteraciones presentes en la concesión Julissa 2A Yanaquihua-Condesuyos-Arequipa
    (Universidad Nacional de San Agustín de Arequipa, 2017)
    Huaman Mamani, Luis Enrique
    La zona de estudio se encuentra ubicada en un área que hasta hace algunos años era considerada como una zona netamente aurífera debido a la gran cantidad de yacimientos de oro en vetas que se encuentran en las inmediaciones (Alpacay, Cerro Rico, Minas Arirahua, San Juan de Chorunga, etc.). Estudios recientes y nuevos hallazgos han permitido identificar la ocurrencia de pórfidos de cobre en la zona de influencia del área estudiada, los ejemplos más conocidos son los recientes hallazgos de Pecoy y Tororume, los cuales han despertado el interés de algunas empresas exploradoras en la búsqueda de este tipo de depósitos en la zona.
  • Publicación
    Characterization of bacillus isolates of potato rhizosphere from Andean soils of Peru and their potential PGPR characteristics
    (Sociedade Brasileira de Microbiologia, 2010)
    Calvo, P
    ;
    Ormeno-Orrillo, E
    ;
    Martinez-Romero, E
    ;
    Zuniga, D
    Bacillus spp. are well known rhizosphere residents of many crops and usually show plant growth promoting (PGP) activities that include biocontrol capacity against some phytopatogenic fungi. Potato crops in the Andean Highlands of Peru face many nutritional and phytophatogenic problems that have a significant impact on production. In this context is important to investigate the natural presence of these microorganisms in the potato rhizosphere and propose a selective screening to find promising PGP strains. In this study, sixty three Bacillus strains isolated from the rhizosphere of native potato varieties growing in the Andean highlands of Peru were screened for in vitro antagonism against Rhizoctonia solani and Fusarium solani. A high prevalence (68%) of antagonists against R. solani was found. Ninety one percent of those strains also inhibited the growth of F. solani. The antagonistic strains were also tested for other plant growth promotion activities. Eighty one percent produced some level of the auxin indole-3-acetic acid, and 58% solubilized tricalcium phosphate. Phylogenetic analysis revealed that the majority of the strains belonged to the B. amyloliquefaciens species, while strains Bac17M11, Bac20M1 and Bac20M2 may correspond to a putative new Bacillus species. The results suggested that the rhizosphere of native potatoes growing in their natural habitat in the Andes is a rich source of Bacillus fungal antagonists, which have a potential to be used in the future as PGP inoculants to improve potato crop.
  • Publicación
    Climatology of extreme cold events in the central Peruvian Andes during austral summer: origin, types and teleconnections
    (Wiley, 2018-10)
    Sulca, Juan
    ;
    Vuille, Mathias
    ;
    Roundy, Paul
    ;
    Takahashi, Ken
    ;
    Espinoza, Jhan‐Carlo
    ;
    Silva, Yamina
    ;
    Trasmonte, Grace
    ;
    Zubieta, Ricardo
    The climatological and large-scale characteristics of the extreme cold events (ECEs) in the central Peruvian Andes (Mantaro basin (MB)) during austral summer (January–March) are examined using reanalysis, gridded and in situ surface minimum temperature (Tmin) data for the 1979–2010 period.
  • Publicación
    Dataset on the first weather radar campaign over Lima, Peru
    (Elsevier Inc., 2021)
    Valdivia J.M.
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    Scipión D.E.
    ;
    Milla M.
    ;
    Prado J.J.
    ;
    Espinoza J.C.
    ;
    Cordova D.
    ;
    Saavedra M.
    ;
    Villalobos E.
    ;
    Callañaupa S.
    ;
    Silva Y.
    The first weather radar campaign over Lima, the capital of Peru, a desertic area on the western side of the Peruvian Andes, was carried out to study the occurrence of rain events in summer 2018. The weather radar was installed strategically and was able to overlook three river basins: Rimac, Chillón, and Lurin. An X-band radar (PX-1000) was used, which operates at 9.55 GHz. PX-1000 was built by the Advanced Radar Research Center (ARRC) at the University of Oklahoma (U.S.A.). The radar operated from January 26th to April 1st, 2018, at Cerro Suche located 2910 m ASL and 55 km from the city of Lima. The PX-1000 performed plan-position-indicators (PPI) for elevations starting at 0° up to 20°. The data presented here were obtained using a three-dimensional constant-altitude plan-position-indicator (3D CAPPI), which was generated by high resolution (250 m) nearest point algorithm. © 2021
  • Publicación
    Development and preliminary validation of an automatic digital analysis system for animal fibre analysis
    (African Journals Online (AJOL), 2017-11-09)
    Quispe, M. D.
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    Benavidez, G.
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    Sauri, R. A.
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    Bengoechea, J. J.
    ;
    Quispe, E. C.
    New equipment was designed and developed to evaluate the physical characteristics of animal fibres, based on an automatic digital analysis system (ADAS) that allows the capture of a series of real-time images. In the development of the mechanical component, a design tool was used that allows visualization, simulation, and documentation of the product.
  • Publicación
    Direct determination of pyrazinamide (PZA) susceptibility by sputum microscopic observation drug susceptibility (MODS) culture at neutral pH: The MODS-PZA assay
    (American Society for Microbiology, 2020)
    Alcántara R.
    ;
    Fuentes P.
    ;
    Marin L.
    ;
    Kirwan D.E.
    ;
    Gilman R.H.
    ;
    Zimic M.
    ;
    Sheen P.
    Pyrazinamide (PZA) is considered the pivot drug in all tuberculosis treatment regimens due to its particular action on the persistent forms of Mycobacterium tuberculosis. However, no drug susceptibility test (DST) is considered sufficiently reliable for routine application. Although molecular tests are endorsed, their application is limited to known PZA resistance associated mutations. Microbiological DSTs for PZA have been restricted by technical limitations, especially the necessity for an acidic pH. Here, for the first time, MODS culture at neutral pH was evaluated using high PZA concentrations (400 and 800 _g/ml) to determine PZA susceptibility directly from sputum samples. Sputum samples were cultured with PZA for up to 21 days at 37°C. Plate reading was performed at two time points: R1 (mean, 10 days) and R2 (mean, 13 days) for each PZA concentration. A consensus reference test, composed of MGIT-PZA, pncA sequencing, and the classic Wayne test, was used. A total of 182 samples were evaluated. The sensitivity and specificity for 400 μg/ml ranged from 76.9 to 89.7 and from 93.0 to 97.9%, respectively, and for 800 μg/ml ranged from 71.8 to 82.1 and from 95.8 to 98.6%, respectively. Compared to MGITPZA, our test showed a similar turnaround time (medians of 10 and 12 days for PZAsensitive and -resistant isolates, respectively). In conclusion, MODS-PZA is presented as a fast, simple, and low-cost DST that could complement the MODS assay to evaluate resistance to the principal first-line antituberculosis drugs. Further optimization of test conditions would be useful in order to increase its performance. Copyright © 2020 Alcántara et al.
  • Publicación
    Diseño, desarrollo y evaluación preliminar de un novedoso monitor de signos vitales llevable para vacunos
    (Universidad Nacional Mayor de San Marcos, Vicerectorado de Investigacion, 2019-03-04)
    Quispe Bonilla, Max
    ;
    Poma Gutiérrez, Adolfo
    ;
    Serrano-Arriezu, Luis
    ;
    Led Ramos, Santiago
    ;
    Quispe Peña, Edgar
    El monitoreo de los diferentes signos vitales en vacunos tiene importancia desde el punto de vista productivo, sanitario y de bienestar animal; sin embargo, existen pocos equipos que tengan el potencial de uso a nivel de campo y que no sean invasivos. Por tal motivo se llevó a cabo el presente trabajo con la finalidad de diseñar, construir y evaluar el uso de un pequeño MOnitor de SIgnos VItales LLevable (MOSIVILLe), que sea capaz de capturar las señales vitales en vacunos bajo condiciones de campo.
  • Publicación
    Diseño, implementación y control de un exoesqueleto para rehabilitación de extremidades superiores
    (Universidad de Piura, 2017)
    Galán Cutipa, Frank Williams
    El objetivo principal de la tesis es diseñar un exoesqueleto que cumpla con los requisitos mínimos necesarios para ser utilizados en terapias de rehabilitación para miembros superiores. Por lo que, la investigación trata en primer lugar el tema de la discapacidad y sus posibles causas, seguidamente de su impacto a nivel mundial y la situación actual de la discapacidad en el Perú. Luego, el estudio se concentra en el diseño de un exoesqueleto para miembros superiores y, mediante parámetros de diseño, se selecciona el material y se proponen soluciones mecánicas a los movimientos y requerimientos, siguiendo con el dimensionamiento y validación mediante pruebas de resistencia con ayuda del software SolidWorks. Como etapa final, se desarrolla el control del actuador, para lo cual, se identificó mediante la herramienta Matlab el modelo con el que posteriormente se calculan los parámetros del controlador. Finalmente, para que el sistema de control funcione en todo el rango de operación, se introdujo un algoritmo basado en interpolación con el cual los parámetros del controlador se modifican dependiendo de la señal de control y, de esta manera, implementarlo en el módulo de pruebas y comprobar su funcionamiento, obteniéndose resultados favorables.