Results 81 to 90 of about 30,250 (199)

Going deeper in the automated identification of Herbarium specimens

BMC Evolutionary Biology, 2017
Background Hundreds of herbarium collections have accumulated a valuable heritage and knowledge of plants over several centuries. Recent initiatives started ambitious preservation plans to digitize this information and make it available to botanists and ...
Jose Carranza-Rojas, Herve Goeau, Pierre Bonnet, Erick Mata-Montero, Alexis Joly   +4 more
doaj   +1 more source

Arctic air pollution: Challenges and opportunities for the next decade [PDF]

, 2016
The Arctic is a sentinel of global change. This region is influenced by multiple physical and socio-economic drivers and feedbacks, impacting both the natural and human environment.
Arnold, S. R., Baklanov, A., Brock, C. A., Dibb, Jack E., Eckhardt, S., Fidel, M., Flanner, M. G., Gamble, J., Johnson, N., Law, K. S., Lund, M. T., Melamed, M., Petaja, T., Sharma, S., Starkweather, S. M., Stohl, A., Tanimoto, H., Thomas, J. L., Tynkkynen, V. P., von Salzen, K.   +19 more
core   +1 more source

Spatial validation reveals poor predictive performance of large-scale ecological mapping models

Nature Communications, 2020
Mapping ecological variables using machine-learning algorithms based on remote-sensing data has become a widespread practice in ecology. Here, the authors use forest biomass mapping as a study case to show that the most common model validation approach ...
Pierre Ploton, Frédéric Mortier, Maxime Réjou-Méchain, Nicolas Barbier, Nicolas Picard, Vivien Rossi, Carsten Dormann, Guillaume Cornu, Gaëlle Viennois, Nicolas Bayol, Alexei Lyapustin, Sylvie Gourlet-Fleury, Raphaël Pélissier   +12 more
doaj   +1 more source

Matrix Product States for Interacting Particles without Hardcore Constraints

, 2017
We construct matrix product steady state for a class of interacting particle systems where particles do not obey hardcore exclusion, meaning each site can occupy any number of particles subjected to the global conservation of total number of particles in
Chatterjee, Amit Kumar, Mohanty, P. K.
core   +1 more source

Mangroves v1.0: a new taxonomic tool to characterize mangroves. The case of South east Indian and Sri Lankan mangroves and potential application to African mangroves [PDF]

, 2009
In this paper we present an innovative tool for plant identification conceived to reinforce the national capacity building in taxonomy. We introduce Mangroves v1.0, built up on a species identification system called IDAO (Identification Assistée par ...
Depommier, Denis, Grard, Pierre, Prosperi, Maria-Juliana   +2 more
core  

Enhancing the Transferability of Adversarial Patch via Alternating Minimization

International Journal of Computational Intelligence Systems
Adversarial patches, a type of adversarial example, pose serious security threats to deep neural networks (DNNs) by inducing erroneous outputs. Existing gradient stabilization methods aim to stabilize the optimization direction of adversarial examples ...
Yang Wang, Lei Chen, Zhen Yang, Tieyong Cao   +3 more
doaj   +1 more source

A circumpolar perspective on fluvial sediment flux to the Arctic ocean [PDF]

, 2002
Quantification of sediment fluxes from rivers is fundamental to understanding land‐ocean linkages in the Arctic. Numerous publications have focused on this subject over the past century, yet assessments of temporal trends are scarce and consensus on ...
Holmes, Robert M., McClelland, James W., Peterson, Bruce J.   +2 more
core   +2 more sources

Performance of DA/FDMA architecture proposed for MSS [PDF]

The system architecture proposed for the Mobile Satellite Service (MSS) by the National Aeronautics and Space Administration (NASA)/JPL is presented. The demand assigned Frequency Division Multiple Access (FDMA) scheme is described, and results for the ...
Dessouky, Khaled, Wang, Charles, Yan, Tsun-Yee   +2 more
core   +1 more source

A Generic Modelling of Fire Impact in a Tree-Grass Savanna Model

Biomath, 2014
We propose and study a model for tree-grass interactions in the context of savannas which are subjected to fire pressure. Several theoretical models in the literature which have highlighted the impact of fire on tree-grass interactions did not explicitly
Alexis Tamen Tchuinte, Jean-Jules Tewa, Pierre Couteron, Samuel Bowong, Yves Dumont   +4 more
doaj   +1 more source

AMAP Assessment 2013: Arctic Ocean Acidification.

, 2013
This assessment report presents the results of the 2013 AMAP Assessment of Arctic Ocean Acidification (AOA). This is the first such assessment dealing with AOA from an Arctic-wide perspective, and complements several assessments that AMAP has delivered over the past ten years concerning the effects of climate change on Arctic ecosystems and people. The
Amundsen, Helene, Anderson, Leif, Andersson, Andreas, Azetsu-Scott, Kumiko, Bellerby, Richard, Beman, Michael, Browman, Howard I., Carlson, Craig, Cheung, William W. L., Chierici, Melissa, Clayton, Tonya, Cooley, Sarah, Croot, Peter, Daan, Nils, Duarte, Carlos, Dupont, Sam, Fine, Maoz, Flaaten, Ola, Fossa, Jan H., Fransson, Agneta, Gjertsen, Arild, Hall-Spencer, Jason, Hallock-Muller, Pamela, Havenhand, Jon, Hilmi, Nathalie, Hovelsrud, Greta K., Hurst, Thomas P., Iglesias-Rodriguez, Debora, Jeansson, Emil, Knorr, Paul, Kurihara, Haruko, Lam, Vicky W. Y., Lisle, John, Macdonald, Robie, MacKenzie, Fred, Manno, Clara, Mathis, Jeremy, McCoy, Sophie, Melzner, Frank, Miller, Lisa, Munday, Philip, Olafsson, Jon, Olsen, Are, Passow, Ute, Pörtner, Hans-Otto, Reiersen, Lars-Otto, Ries, Justin, Robbins, Lisa, Robert, Dominique, Runge, Jeffrey, Safa, Alain, Scott, David, Skjoldal, Hein Rune, Steiner, Nadja, Sumaila, U. Rashid, Suzuki, Keita, Thingstad, Frede, Wilson, Simon, Wootton, Tim, Yamamoto-Kauai, Michiyo   +59 more
openaire   +3 more sources