Facultad de Ciencias Físicas y Matemáticas: Recent submissions

Now showing items 7461-7480 of 21845

    • A teaching accompaniment and development model: possibilities and challenges for teaching and learning centers 
      Jerez Yáñez, Oscar; Aranda Cáceres, Romina; Corvalán Canessa, Fernanda; González Rojas, Lesslie; Ramos Torres, Armin (Routledge, 2019)
      We propose a ‘1-to-1’ accompaniment and teaching development model emerging from the analysis and reflection of professional experience at a Teaching and Learning Center in a Chilean university. We highlight the relevance ...
    • Adjunctive effects of a sub-antimicrobial dose of doxycycline on clinical parameters and potential biomarkers ... 
      Emingil, Gülnur; Gürkan, Ali; Tervahartiala, Taina; Hernández, Marcela; Özgül, Semiha; Sorsa, Timo; Alassiri, Saeed (MDPI Multidisciplinary Digital Publishing Institute, 2019)
      Objectives: The aim of the present randomized, double-blind, placebo-controlled, parallel-arm study was to examine the effectiveness of a sub-antimicrobial dose of doxycycline (SDD) in combination with nonsurgical periodontal ...
    • Protective effect of inactivated blastoconidia in keratinocytes and human reconstituted epithelium against ... 
      Alburquenque, Claudio; Amaro, José; Fuentes, Marisol; Falconer, Mary A.; Moreno, Claudia; Covarrubias, Cristian; Pinto, Cristian; Rodas, Paula I.; Bucarey, Sergio A.; Hermosilla, Germán; Magne, Fabien; Tapia, Cecilia V. (Oxford University Press, 2019)
      Candida albicans is commensal yeast that colonizes skin and mucosa; however, it can become an opportunist pathogen by changing from blastoconidia (commensal form) into hypha (pathogenic form). Each form activates a different ...
    • Emergence of robust precipitation changes across crop production areas in the 21st century 
      Rojas, Maisa; Lambert, Fabrice; Ramírez Villegas, Julián; Challinor, Andrew J. (National Academy of Sciences, 2019)
      A warming climate will affect regional precipitation and hence food supply. However, only a few regions around the world are currently undergoing precipitation changes that can be attributed to climate change. Knowing when ...
    • Enhancing mental health research capacity: Emerging voices from the National Institute of Mental Health ... 
      Da Silva, Andrea Tenório Correia; Hanlon, Charlotte; Susser, Ezra; Rojas, Graciela; García Claro, Heloísa; Quayle, Julieta; Habtamu, Kassahun; Burrone, María Soledad; Cavalcanti, María Tavares; Sharma, Mona; Schneider, Marguerite; Adhikari, Ramesh Prasad; van de Water, Tanya; Mohammed, Yasmin; Ordóñez, Anna E.; Seedat, Soraya (BioMed Central, 2019)
      Background: Emerging researchers in low- and middle-income countries (LMIC) face many barriers, including inadequacies in funding, international exposure and mentorship. In 2012, the National Institute of Mental Health ...
    • A Design Methodology of Multiresonant Controllers for High Performance 400 Hz Ground Power Units 
      Rojas, Félix; Cárdenas, Roberto; Clare, Jon; Díaz, Matías; Pereda, Javier; Kennel, Ralph (Institute of Electrical and Electronics Engineers, 2019)
      In aerospace applications, a ground power unit has to provide balanced and sinusoidal 400 Hz phase-to-neutral voltages to unbalanced and nonlinear single-phase loads. Compensation of high-order harmonics is complex, as the ...
    • Survivorship of wild caught Mepraia spinolai nymphs: The effect of seasonality and Trypanosoma cruzi infection ... 
      Cabe, A. Mc; Yañez, F.; Pinto, R.; López, A.; Ortiz, S.; Muñoz San Martín, Catalina; Botto Mahan, Carezza; Solari, A. (Elsevier B.V., 2019)
      Chagas disease is caused by Trypanosoma cruzi. Vector survival is an important variable affecting vectorial capacity to determine parasite transmission risk. The aims of this study are to evaluate vector survival under ...
    • Changes in belowground biodiversity during ecosystem development 
      Delgado Baquerizo, Manuel; Bardgett, Richard D.; Vitousek, Peter M.; Maestre, Fernando T.; Williams, Mark A.; Eldridge, David J.; Lambers, Hans; Neuhauser, Sigrid; Gallardo, Antonio; García Velázquez, Laura; Sala, Osvaldo E.; Abades, Sebastián R.; Alfaro, Fernando D.; Berhen, Asmeret A.; Bowker, Matthew A.; Currier, Courtney M.; Cutler, Nick A.; Hart, Stephen C.; Hayes, Patrick E.; Hseu, Zeng-Yei; Kirchmair, Martin; Peña Ramírez, Víctor M.; Pérez, Cecilia A.; Reed, Sasha C.; Santos, Fernanda; Siebe, Christina; Sullivan, Benjamin W.; Weber-Grullon, Luis; Fierer, Noah (National Academy of Sciences, 2019)
      Belowground organisms play critical roles in maintaining multiple ecosystem processes, including plant productivity, decomposition, and nutrient cycling. Despite their importance, however, we have a limited understanding ...
    • Touching the Sky: Coccinellids (Coleoptera: Coccinellidae) at High Altitudes in South America 
      González, G.; Bustamante, A.; Grez Villarroel, Audrey (Springer, 2019)
      Records of extreme altitudes where several coccinellid species from South America inhabit the Andes of Argentina, Bolivia, Chile, Colombia, Ecuador, and Peru are provided. After an intensive review of several entomological ...
    • Patterns of theory use in qualitative research in higher education studies in Latin America: a geopolitical ... 
      Guzmán Valenzuela, Carolina; Barnett, Ronald (Routledge, 2019)
      The relationship between theory and qualitative research has been extensively examined in the literature and has emerged as a problematic matter. This debate has been driven forward mainly in Anglo-Saxon countries and has ...
    • Fluid Distribution in the Central Andes Subduction Zone Imaged With Magnetotellurics 
      Araya Vargas, J.; Meqbel, N. M.; Ritter, O.; Brasse, H.; Weckmann, U.; Yáñez, G.; Godoy, B. (Blackwell Publishing Ltd, 2019)
      We present a model of the electrical resistivity structure of the lithosphere in the Central Andes between 20° and 24°S from 3-D inversion of 56 long-period magnetotelluric sites. Our model shows a complex resistivity ...
    • Short chain fatty acids (SCFAs)mediated gut epithelial and immune regulation and its relevance for inflammatory ... 
      Venegas, Daniela Parada; De La Fuente, Marjorie K.; Landskron, Glauben; González, María Julieta; Quera, Rodrigo; Dijkstra, Gerard; Harmsen, Hermie J.M.; Faber, Klaas Nico; Hermoso, Marcela A. (Frontiers Media S.A., 2019)
      Ulcerative colitis (UC) and Crohn's disease (CD), collectively known as Inflammatory Bowel Diseases (IBD), are caused by a complex interplay between genetic, immunologic, microbial and environmental factors. Dysbiosis of ...
    • Assessing the ability of image based point clouds captured from a UAV to measure the terrain in the presence ... 
      Wallace, Luke; Bellman, Chris; Hally, Bryan; Hernandez, Jaime; Jones, Simon; Hillman, Samuel (MDPI AG, 2019)
      Point clouds captured from Unmanned Aerial Systems are increasingly relied upon to provide information describing the structure of forests. The quality of the information derived from these point clouds is dependent on a ...
    • A green and simple sample preparation method to determine pesticides in rice using a combination of SPME ... 
      Omena, Eduarda; Oenning, Anderson Luiz; Merib, Josias; Richter Duk, Pablo; Rosero-Moreano, Milton; Carasek, Eduardo (Elsevier B.V., 2019)
      In this study, a novel environmentally-friendly approach was developed to overcome certain limitations in the analysis of solid food samples. An experimental setup based on solid-phase microextraction apparatus coupled to ...
    • A control-function approach to correct for endogeneity in discrete choice models estimated on SP-off-RP ... 
      Guevara, C. Angelo; Hess, Stephane (Elsevier Ltd, 2019)
      It is common practice to build Stated Preference (SP) attributes and alternatives from observed Revealed Preference (RP) choices with a view to increasing realism. While many surveys pivot all alternatives around an observed ...
    • Evaluation of Neosaxitoxin as a local anesthetic during piglet castration: A potential alternative for Lidocaine 
      Valenzuela, Carolina; Torres, Cristian; Muñoz, Vanina; Simbaina, Juan Carlos; Sánchez, Andrella; Bustamante, Tamara; Sepúlveda, Joaquín M.; Piron, Robin; Del Campo, Miguel; Lagos, Néstor (Elsevier Ltd, 2019)
      Objetive: To evaluate Neosaxitoxin (NeoSTX) as a local anesthetic drug, for pain control during and after piglet castration. Study design: Prospective, randomized and double-blind study. Animals: 24 commercial hybrids, ...
    • Exploring the R CrA environment with SPHERE: Discovery of a new stellar companion 
      Mesa, D.; Bonnefoy, M.; Gratton, R.; Van Der Plas, G.; D'Orazi, V.; Sissa, E.; Zurlo, A.; Rigliaco, E.; Schmidt, T.; Langlois, M.; Vigan, A.; Ubeira Gabellini, M. G.; Desidera, S.; Antoniucci, S.; Barbieri, M.; Benisty, Myriam; Boccaletti, A.; Claudi, R.; Fedele, D.; Gasparri, (EDP Sciences, 2019)
      Aims. R Coronae Australis (R CrA) is the brightest star of the Coronet nebula of the Corona Australis (CrA) star forming region. This star is very red in color, probably due to dust absorption, and is strongly variable. ...
    • ALMA study of the HD 100453 AB system and the tidal interaction of the companion with the disk 
      Van Der Plas, G.; Ménard, F.; Gonzalez, J. F.; Perez, S.; Rodet, L.; Pinte, C.; Cieza, L.; Casassus Montero, Simón; Benisty, Myriam (EDP Sciences, 2019)
      Context. The complex system HD 100453 AB with a ring-like circumprimary disk and two spiral arms, one of which is pointing to the secondary, is a good laboratory in which to test spiral formation theories. Aims. We aim to ...
    • Spatial segregation of dust grains in transition disks : SPHERE observations of 2MASS J16083070-3828268 and ... 
      Villenave, M.; Benisty, Myriam; Dent, W. R.F.; Ménard, F.; Garufi, A.; Ginski, C.; Pinilla, P.; Pinte, C.; Williams, J. P.; De Boer, J.; Morino, J. I.; Fukagawa, M.; Dominik, C.; Flock, M.; Henning, T.; Juhász, A.; Keppler, M.; Muro-Arena, G.; Olofsson, J.; Pérez, L. M.; Van Der (EDP Sciences, 2019)
      Context. The mechanisms governing the opening of cavities in transition disks are not fully understood. Several processes have been proposed, but their occurrence rate is still unknown. Aims. We present spatially resolved ...
    • Centennial-Scale SE Pacific Sea Surface Temperature Variability Over the Past 2,300 Years 
      Collins, James A.; Lamy, Frank; Kaiser, Jérôme; Ruggieri, Nicoletta; Henkel, Susann; De Pol-Holz, Ricardo; Garreaud Salazar, René; Arz, Helge W. (John Wiley and Sons Inc., 2019)
      Detailed temperature reconstructions over the past 2,000 years are important for contextualizing modern climate change. The midlatitude SE Pacific is a key region in this regard in terms of understanding the climatic ...