Institution
University of Los Andes
Education•Bogotá, Colombia•
About: University of Los Andes is a education organization based out in Bogotá, Colombia. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 17616 authors who have published 25555 publications receiving 413463 citations.
Papers published on a yearly basis
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TL;DR: In this article, the authors highlight the importance of chloride content measuring, and also summarize the state of the art of non-destructive and in situ techniques for measuring chloride content into concrete structures.
130 citations
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TL;DR: In this paper, a broad jet was observed in a weak magnetic eld area at the edge of active region NOAA 11106 that also produced other nearby recurring and narrow jets, and local correlation tracking was used to identify the photospheric motions that triggered the jet, and time-slices were extracted along and across the jet to unveil its complex nature.
Abstract: Aims. A broad jet was observed in a weak magnetic eld area at the edge of active region NOAA 11106 that also produced other nearby recurring and narrow jets. The peculiar shape and magnetic environment of the broad jet raised the question of whether it was created by the same physical processes of previously studied jets with reconnection occurring high in the corona. Methods. We carried out a multi-wavelength analysis using the EUV images from the Atmospheric Imaging Assembly (AIA) and magnetic elds from the Helioseismic and Magnetic Imager (HMI) both on-board the SDO satellite, which we coupled to a high-resolution, nonlinear force-free eld extrapolation. Local correlation tracking was used to identify the photospheric motions that triggered the jet, and time-slices were extracted along and across the jet to unveil its complex nature. A topological analysis of the extrapolated eld was performed and was related to the observed features. Results. The jet consisted of many dierent threads that expanded in around 10 minutes to about 100 Mm in length, with the bright features in later threads moving faster than in the early ones, reaching a maximum speed of about 200 km s 1 . Time-slice analysis revealed a striped pattern of dark and bright strands propagating along the jet, along with apparent damped oscillations across the jet. This is suggestive of a (un)twisting motion in the jet, possibly an Alfv
130 citations
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Liverpool School of Tropical Medicine1, Universidad Autónoma de Nuevo León2, University of California, Davis3, Mahidol University4, University of Los Andes5, Kenya Medical Research Institute6, University of the East7, Universidad Autónoma de Yucatán8, World Health Organization9, Institute of Tropical Medicine Antwerp10
TL;DR: It is proposed to test the non‐inferiority hypothesis that a vector control approach targeting only the most productive water container types gives the same or greater reduction of the vector population as a non‐targeted approach in different ecological settings.
Abstract: Summary objectives To test the non-inferiority hypothesis that a vector control approach targeting only the most productive water container types gives the same or greater reduction of the vector population as a non-targeted approach in different ecological settings and to analyse whether the targeted intervention is less costly. methods Cluster randomized trial in eight study sites (Venezuela, Mexico, Peru, Kenya, Thailand, Myanmar, Vietnam, Philippines), with each study area divided into 18–20 clusters (sectors or neighbourhoods) of approximately 50–100 households each. Using a baseline pupal-demographic survey, the most productive container types were identified which produced ‡55% of all Ae. aegypti pupae. Clusters were then paired based on similar pupae per person indices. One cluster from each pair was randomly allocated to receive the targeted vector control intervention; the other received the ‘blanket’ (nontargeted) intervention attempting to reach all water holding containers. results The pupal-demographic baseline survey showed a large variation of productive container types across all study sites. In four sites the vector control interventions in both study arms were insecticidal and in the other four sites, non-insecticidal (environmental management and ⁄ or biological control methods). Both approaches were associated with a reduction of outcome indicators in the targeted and non-targeted intervention arm of the six study sites where the follow up study was conducted (PPI, Pupae per Person Index and BI, Breteau Index). Targeted interventions were as effective as non-targeted ones in terms of PPI. The direct costs per house reached were lower in targeted intervention clusters than in non-targeted intervention clusters with only one exception, where the targeted intervention was delivered through staff-intensive social mobilization. conclusions Targeting only the most productive water container types (roughly half of all water holding container types) was as effective in lowering entomological indices as targeting all water holding containers at lower implementation costs. Further research is required to establish the most efficacious method or combination of methods for targeted dengue vector interventions.
129 citations
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TL;DR: Low temperature-long time or high temperature-short time pretreatments are necessary for high glucose release from late-harvest Dacotah switchgrass but high temperatures may cause xylose degradation.
129 citations
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University of Leeds1, Ghent University2, Université Paris-Saclay3, University of Paris4, Potsdam Institute for Climate Impact Research5, Technische Universität München6, National Institute for Space Research7, University of Exeter8, Los Alamos National Laboratory9, University of Edinburgh10, Wageningen University and Research Centre11, Australian National University12, Harvard University13, Cooperative Institute for Mesoscale Meteorological Studies14, Universidad Autónoma Gabriel René Moreno15, Florida International University16, Universidade Federal do Acre17, Institut national de la recherche agronomique18, Tropenbos International19, Paul Sabatier University20, Amazon.com21, Federal University of Pará22, University of Texas at Austin23, Museu Paraense Emílio Goeldi24, World Wide Fund for Nature25, James Cook University26, George Mason University27, Environmental Change Institute28, Universidade do Estado de Mato Grosso29, Duke University30, National University of Colombia31, University of Los Andes32, Georgetown University33, Federal University of Alagoas34, Naturalis35, University of Nottingham36
TL;DR: It is found that woody NPP is not correlated with stem mortality rates and is weakly positively correlated with AGB, and across the four models, basin‐wide average AGB is similar to the mean of the observations.
Abstract: Understanding the processes that determine above-ground biomass (AGB) in Amazonian forests is important for predicting the sensitivity of these ecosystems to environmental change and for designing and evaluating dynamic global vegetation models (DGVMs). AGB is determined by inputs from woody productivity [woody net primary productivity (NPP)] and the rate at which carbon is lost through tree mortality. Here, we test whether two direct metrics of tree mortality (the absolute rate of woody biomass loss and the rate of stem mortality) and/or woody NPP, control variation in AGB among 167 plots in intact forest across Amazonia. We then compare these relationships and the observed variation in AGB and woody NPP with the predictions of four DGVMs. The observations show that stem mortality rates, rather than absolute rates of woody biomass loss, are the most important predictor of AGB, which is consistent with the importance of stand size structure for determining spatial variation in AGB. The relationship between stem mortality rates and AGB varies among different regions of Amazonia, indicating that variation in wood density and height/diameter relationships also influences AGB. In contrast to previous findings, we find that woody NPP is not correlated with stem mortality rates and is weakly positively correlated with AGB. Across the four models, basin-wide average AGB is similar to the mean of the observations. However, the models consistently overestimate woody NPP and poorly represent the spatial patterns of both AGB and woody NPP estimated using plot data. In marked contrast to the observations, DGVMs typically show strong positive relationships between woody NPP and AGB. Resolving these differences will require incorporating forest size structure, mechanistic models of stem mortality and variation in functional composition in DGVMs.
129 citations
Authors
Showing all 17748 results
Name | H-index | Papers | Citations |
---|---|---|---|
Alexander Belyaev | 142 | 1895 | 100796 |
Sarah Catherine Eno | 141 | 1645 | 105935 |
Mitchell Wayne | 139 | 1810 | 108776 |
Kaushik De | 139 | 1625 | 102058 |
Pierluigi Paolucci | 138 | 1965 | 105050 |
Randy Ruchti | 137 | 1832 | 107846 |
Gabor Istvan Veres | 135 | 1349 | 96104 |
Raymond Brock | 135 | 1468 | 97859 |
Harrison Prosper | 134 | 1587 | 100607 |
J. Ellison | 133 | 1392 | 92416 |
Gyorgy Vesztergombi | 133 | 1444 | 94821 |
Andrew Brandt | 132 | 1246 | 94676 |
Scott Snyder | 131 | 1317 | 93376 |
Shuai Liu | 129 | 1095 | 80823 |
C. A. Carrillo Montoya | 128 | 1033 | 78628 |