4.1 Organización de eventos
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PublicaciónA new species of Bothrops (Serpentes: Viperidae: Crotalinae) from Pampas del Heath, southeastern Peru, with comments on the systematics of the Bothrops neuwiedi species group(Magnolia Press, 2019)
;Carrasco P.A. ;Grazziotin F.G. ;Cruz Farfán R.S. ;Koch C. ;Antonio Ochoa J. ;Scrocchi G.J. ;Leynaud G.C.Chaparro J.C.We describe a new species of pitviper of the genus Bothrops from the Peruvian Pampas del Heath, in the Bahuaja-Sonene National Park. Pampas del Heath is an area of seasonally flooded savannas and a northwestern extension of the Gran Chaco Boliviano-Paraguayo. -
PublicaciónA new species of pitviper of the genus Bothrops (Serpentes: Viperidae: Crotalinae) from the Central Andes of South America(Magnolia Press, 2019)
;Timms, Juan ;Chaparro, Juan C. ;Venegas, Pablo J. ;Salazar-Valenzuela, David ;Scrocchi, Gustavo ;Cuevas, Jairo ;Leynaud, GerardoCarrasco, Paola A.We describe a new species of montane pitviper of the genus Bothrops from the Cordillera Oriental of the Central Andes, distributed from southern Peru to central Bolivia. The new species can be distinguished from its congeners by the characteristic combination of a dorsal body color pattern consisting of triangular or subtriangular dark brown dorsal blotches, paired dark brown parallel occipital stripes, a conspicuous dark brown postocular stripe, the presence of canthorostrals in some specimens, prelacunal fused or partially fused with second supralabial, one scale usually separating internasals, rostral trapezoidal, two canthals oval to rounded, similar size or slightly larger than internasals, three or four medial intercanthals, eight to twelve intersupraoculars, intercanthals and intersupraoculars keeled and frequently slightly keeled, supraoculars oval, one to three suboculars, two to three postoculars, loreal subtriangular, two to six prefoveals, subfoveals absent, two or none postfoveals, one or two scales between suboculars and fourth supralabial, seven or eight supralabials, nine or eleven infralabials, 23-25 middorsal scales, 189-195 ventrals in females and 182-190 in males, 48-58 subcaudals in females and 54-63 in males, exceptionally undivided. The new species is apparently restricted to areas within Andean montane forests that are less humid and devoid of large trees. -
PublicaciónAn exploration into caring for a stroke-survivor in Lima, Peru: Emotional impact, stress factors, coping mechanisms and unmet needs of informal caregivers(Elsevier, 2017)
;Pesantes M.A. ;Brandt L.R. ;Ipince A. ;Miranda J.J.Diez-Canseco F.Understanding local complexities and challenges of stroke-related caregiving are essential to develop appropriate interventions. Our study aimed to characterize the impact of post-stroke care among informal caregivers in a setting of transitioning economy. -
PublicaciónBending collapse analysis for thin and medium-thin-walled square and rectangular hollow shapes(Elsevier Ltd, 2021)
;Lavayen-Farfan D. ;Boada M.J.L.Rodriguez-Hernandez J.A.Thin-walled hollow shapes are of great interest in many industries with weight constraints due to their availability, low price, and strength to weight ratio. However, they are also prone to localized bending collapse, which can be used as an energy absorption mechanism during deformation. Up until now, industrial applications have relied on numerical simulations, non-standardized tests, and a handful of theories to address the bending collapse behavior. In this paper, a modification to the most widely used theory is presented and adapted for hollow shapes with greater thickness that cannot be considered “thick”. To verify the accuracy of the proposed modification, a comparison with a detailed FEM model, validated through various three-point bending collapse experimental tests, has been performed. The results seem to show that the proposed modifications can predict the maximum load and collapse stage behavior of hollow shapes with more accuracy than the original analytical model. Thus, the proposed modification may be used to predict the collapse behavior of commercially available square and rectangular hollow shapes in different fields of application. © 2021 Elsevier Ltd -
PublicaciónDeep Convolutional Neural Networks for Plant Species Characterization Based on Leaf Midrib(Springer International Publishing, 2019)
;Scabini, Leonardo F. S. ;Condori, Rayner M. ;Munhoz, Isabella C. L.Bruno, Odemir M.The automatic characterization and classification of plant species is an important task for plant taxonomists. On this work, we propose the use of well-known pre-trained Deep Convolutional Neural Networks (DCNN) for the characterization of plants based on their leaf midrib. The samples studied are microscope images of leaf midrib cross-sections taken from different specimens under varying conditions. Results with traditional handcrafted image descriptors demonstrate the difficulty to effectively characterize these samples. Our proposal is to use DCNN as a feature extractor through Global Average Pooling (GAP) over the raw output of its last convolutional layers without the application of summarizing functions such as ReLU and local poolings. Results indicate considerably performance improvements over previous approaches under different scenarios, varying the image color-space (gray-level or RGB) and the classifier (KNN or LDA). The highest result is achieved by the deeper network analyzed, ResNet (101 layers deep), using the LDA classifier, with 99.20% of accuracy rate. However, shallower networks such as AlexNet also provide good classification results (97.36%), which is still a significant improvement over the best previous result (83.67% of combined fractal descriptors). -
PublicaciónEpidemiology, landscape architecture, “one health,” and innovation: Experience in an amazonian community [Epidemiología, arquitectura paisajista, «una salud» e innovación: Experiencia en una comunidad amazónica](Instituto Nacional de Salud, 2018)
;Alarcón J.O. ;Alarcón J.A.Andrews L.This article makes brief reference to the background of the “One Health” concept in the global and Peruvian context, and to the way in which this holistic health perspective served as the foundation for the creation of the Center for Technological, Biomedical, and Environmental Research (CITBM) at Universidad Nacional Mayor de San Marcos. Additionally, it describes the InterACTION Labs project, one of the experiences using the “One Health” approach, led by CITBM, the University of Washington, and Traction, an NGO focused on design and research in health and ecology topics. -
PublicaciónEvaluating Deep Convolutional Neural Networks as Texture Feature Extractors(Springer International Publishing, 2019)
;Scabini, Leonardo F. S. ;Condori, Rayner H. M. ;Ribas, Lucas C.Bruno, Odemir M.Texture is an important visual property which has been largely employed for image characterization. Recently, Convolutional Networks has been the predominant approach on Computer Vision, and their application on texture analysis shows interesting results. However, their popularity steers around object recognition, and several convolutional architectures have been proposed and trained for this task. Therefore, this works evaluates 17 of the most diffused Deep Convolutional Neural Networks when employed for texture analysis as feature extractors. Image descriptors are obtained through Global Average Pooling over the output of the last convolutional layer of networks with random weights or learned from the ImageNet dataset. The analysis is performed under 6 texture datasets and using 3 different supervised classifiers (KNN, LDA, and SVM). Results using networks with random weights indicates that the architecture alone plays an important role in texture characterization, and it can even provide useful features for classification for some datasets. On the other hand, we found that although ImageNet weights usually provide the best results it can also perform similar to random weights in some cases, indicating that transferring convolutional weights learned on ImageNet may not always be appropriate for texture analysis. When comparing the best models, our results corroborate that DenseNet presents the highest overall performance while keeping a significantly small number of hyperparameters, thus we recommend its use for texture characterization. -
PublicaciónGenotypic identification of Bacillus sp isolated from canned white asparagus (Asparagus officinalis) during the production/processing chain in northern Peru(BioMed Central, 2012)
;Velezmoro Sánchez, Carmen Eloisa ;Ramos, E ;Garcia, CZuniga, DBacillus strains isolated from several stages of white asparagus production/processing before/after thermal treatment were characterized molecularly by BOX–PCR amplification and 16S ribosomal gene sequencing. -
PublicaciónGlobal Shifts in Cardiovascular Disease, the Epidemiologic Transition, and Other Contributing Factors Toward a New Practice of Global Health Cardiology(Elsevier, 2017)
;Mendoza, WMiranda, JJThe epidemiologic transition theory, since it was first proposed, gave an intellectual boost to understanding the changing dynamics of epidemiologic profiles.The epidemiologic transition provided a complement to the discourse of demographic change. Despite its criticisms and revisions, it is still a useful concept that influences public health debates, and has proved to be influential, particularly in changing societies. -
PublicaciónHuman resources for health in Peru: Recent trends (2007-2013) in the labour market for physicians, nurses and midwives(BioMed Central Ltd., 2017)
;Jimenez M.M. ;Bui A.L. ;Mantilla E.Miranda J.J.Most analyses of gaps in human resources for health (HRH) do not consider training and the transition of graduates into the labour market. This study aims to explore the labour market for Peru’s recent medical, nursing, and midwifery graduates as well as their transition into employment in the Ministry of Health’s (MOH) system. -
PublicaciónIndigenous and tribal peoples' health (The Lancet–Lowitja Institute Global Collaboration): a population study(Lancet Publishing Group, 2016)
;Anderson I. ;Robson B. ;Connolly M. ;Al-Yaman F. ;Bjertness E. ;King A. ;Tynan M. ;Madden R. ;Bang A. ;Coimbra C.E.A. ;Jr ;Pesantes M.A. ;Amigo H. ;Andronov S. ;Armien B. ;Obando D.A. ;Axelsson P. ;Bhatti Z.S. ;Bhutta Z.A. ;Bjerregaard P. ;Bjertness M.B. ;Briceno-Leon R. ;Broderstad A.R. ;Bustos P. ;Chongsuvivatwong V. ;Chu J. ;Deji ;Gouda J. ;Harikumar R. ;Htay T.T. ;Htet A.S. ;Izugbara C. ;Kamaka M. ;King M. ;Kodavanti M.R. ;Lara M. ;Laxmaiah A. ;Lema C. ;Taborda A.M.L. ;Liabsuetrakul T. ;Lobanov A. ;Melhus M. ;Meshram I. ;Miranda J.J. ;Mu T.T. ;Nagalla B. ;Nimmathota A. ;Popov A.I. ;Poveda A.M.P. ;Ram F. ;Reich H. ;Santos R.V. ;Sein A.A. ;Shekhar C. ;Sherpa L.Y. ;Skold P. ;Tano S. ;Tanywe A. ;Ugwu C. ;Ugwu F. ;Vapattanawong P. ;Wan X. ;Welch J.R. ;Yang G. ;Yang Z.Yap L.International studies of the health of Indigenous and tribal peoples provide important public health insights. Reliable data are required for the development of policy and health services. Previous studies document poorer outcomes for Indigenous peoples compared with benchmark populations, but have been restricted in their coverage of countries or the range of health indicators. Our objective is to describe the health and social status of Indigenous and tribal peoples relative to benchmark populations from a sample of countries. -
PublicaciónLow-carbon electricity production through the implementation of photovoltaic panels in rooftops in urban environments: A case study for three cities in Peru(Elsevier, 2018)
;Bazán J. ;Rieradevall J. ;Gabarrell X.Vázquez-Rowe I.Urban environments in Latin America must begin decarbonizing their activities to avoid increasing greenhouse gases (GHGs) emissions rates due to their reliance on fossil fuel-based energy to support economic growth. In this context, cities in Latin America have high potential to convert sunlight into energy. Hence, the main objective of this study was to determine the potential of electricity self-sufficiency production and mitigation of GHG emissions in three medium-sized cities in Peru through the revalorization of underutilized rooftop areas in urban environments. -
PublicaciónNeutralization of toxicological activities of medically-relevant Bothrops snake venoms and relevant toxins by two polyvalent bothropic antivenoms produced in Peru and Brazil(Elsevier, 2016)
;Estevao-Costa M.I. ;Gontijo S.S. ;Correia B.L. ;Yarleque A. ;Vivas-Ruiz D. ;Rodrigues E. ;Chávez-Olortegui C. ;Oliveira L.S.Sanchez E.F.Snakebite envenoming is a neglected public pathology, affecting especially rural communities or isolated areas of tropical and subtropical Latin American countries. The parenteral administration of antivenom is the mainstay and the only validated treatment of snake bite envenoming. Here, we assess the efficacy of polyspecific anti-Bothrops serum (α-BS) produced in the Instituto Nacional de Salud (INS, Peru) and at the Fundação Ezequiel Dias (FUNED, Brazil), to neutralize the main toxic activities induced by five medically-relevant venoms of: Bothrops atrox, B. barnetti, and B. pictus from Peru, and the Brazilian B. jararaca and B. leucurus, all of them inhabiting different geographical locations.