Results 41 to 50 of about 148,760 (303)

Performance improvement of discrete‐time linear‐quadratic regulators applied to uncertain linear systems using the Tikhonov regularization method

Asian Journal of Control, EarlyView.
Abstract The linear‐quadratic regulator (LQR) problem of optimal control of an uncertain discrete‐time linear system (DTLS) is revisited in this paper from the perspective of Tikhonov regularization. We show that an optimally chosen regularization parameter reduces, compared to the classical LQR, the values of a scalar error function, as well as the ...
Fernando Pazos, Amit Bhaya
wiley   +1 more source

Presencia de Mimosa regnellii (Mimosoideae, Leguminosae) en Argentina

Boletín de la Sociedad Argentina de Botánica, 2015
En el presente trabajo se confirma formalmente la presencia de Mimosa regnellii y se cita por primera vez a M. regnellii var. exuta para la Flora Argentina.
Matías Morales
doaj   +1 more source

Novelties for the genus Rosellinia (Ascomycota-Xylariaceae) from Northwest of Argentina [PDF]

, 2012
Se reporta por primera vez a Rosellinia canzacotoana en el Cono Sur de América y a Rosellinia arcuata para la Argentina. Rosellinia necatrix se cita creciendo sobre árboles en descomposición de la flora autóctona de la Argentina.
Hladki, Adriana Ines, Perera, Teresa C., Romero, Andrea Irene, Sir, Esteban Benjamin   +3 more
core  

A high-altitude peatland record of environmental changes in the NW Argentine Andes (24 ° S) over the last 2100 years [PDF]

, 2016
High-altitude cushion peatlands are versatile archives for high-resolution palaeoenvironmental studies, due to their high accumulation rates, range of proxies, and sensitivity to climatic and/or human-induced changes. Especially within the Central Andes,
Hense, Jonathan, Kock, Sebastian T., Kulemeyer, Julio José, Lupo, Liliana Concepcion, Lücke, Andreas, Ohlendorf, Christian, Schittek, Karsten, Schäbitz, Frank   +7 more
core   +3 more sources

The influence of rivers on seabird foraging ecology

Biological Reviews, EarlyView.
ABSTRACT Rivers act as vital arteries to the world's oceans, delivering fresh water and nutrients that sustain marine ecosystems. Globally, river flow increasingly is being altered by climate change and anthropogenic pressures; yet the significance of rivers to predatory marine species, such as seabirds, and the extent to which river‐related changes ...
Julia B. Morais, Andre Chiaradia, Richard D. Reina   +2 more
wiley   +1 more source

Austrochthamalia teyucuarensis (Apocynaceae: Asclepiadoideae), una nueva especie endémica de Misiones, Argentina

Lilloa, 2015
Keller, H. A. 2015. “Austrochthamalia teyucuarensis (Apocynaceae: Asclepiadoideae), una nueva especie endémica de Misiones, Argentina”. Lilloa 52 (1).
Héctor A. Keller
doaj  

Extent, characteristics and policy applications of Key Biodiversity Areas

Biological Reviews, EarlyView.
ABSTRACT A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy
Stuart H. M. Butchart, Olivia Crowe, Tom Scott, Andrew J. Plumptre, Megan Eldred, Ellen McKee, Zoltan Waliczky, Ibrahim Al Hasani, Adrián B. Azpiroz, Daniele Baisero, Fred Barasa, Alison E. Beresford, Bezeng S. Bezeng, Charlotte Boyd, Thomas M. Brooks, Graeme Buchanan, Gill Bunting, Sofia Capellan, Neil Cox, Tim R. B. Davenport, Tammy E. Davies, Gina Della Togna, Wendy Elliott, Matt Foster, Jo Gilbert, Jonathan M. Handley, Diego Juffe‐Bignoli, Victoria R. Jones, Naomi Kingston, Jeannot Kivono, John Lamoreux, Penny F. Langhammer, James Lewis, Bruce Liggitt, Daniel Marnewick, Paul Matiku, Erin McCreless, Rachel A. Neugarten, Catherine Numa, Mark O'Brien, Madhu Rao, Ciara Raudsepp‐Hearne, Justina C. Ray, Samridhi Rijal, Jon Paul Rodríguez, Jurgis Sapijanskas, Wes Sechrest, Martin Sneary, Andrew Snyder, Konstantina Spiliopoulou, Thomas Starnes, Cecilia Tobar, Gautam Surya, Marcelo F. Tognelli, Andrew W. Tordoff, Maria G. Toscano, Yongyut Trisurat, Amy Upgren   +57 more
wiley   +1 more source

New records for Argentina of two multipurpose species: Acca sellowiana (Myrtaceae) and Casearia lasiophylla (Flacourtiaceae) [PDF]

, 2007
Se citan por primera vez para la flora argentina las especies Acca sellowiana (Myrtaceae) y Casearia lasiophylla (Flacourtiaceae), las cuales se destacan en otros países por sus múltiples usos.
Keller, Hector Alejandro
core  

Counting cases, conserving species: addressing highly pathogenic avian influenza in wildlife

Biological Reviews, EarlyView.
ABSTRACT Highly pathogenic avian influenza (HPAI) has become a critical threat to wildlife, shifting from a seasonal epizootic to a persistent, year‐round panzootic with global consequences. Here, we summarise the origin, evolutionary mechanisms, and expanding host range of the current H5N1 virus (clade 2.3.4.4b) and assess its impact on wildlife. Over
Ulrich Knief, Sandra Bouwhuis, Anja Globig, Anne Günther, Wouter Courtens   +4 more
wiley   +1 more source

Fatoua villosa (Moraceae): primer reporte como subespontánea en Argentina y Sudamérica

Lilloa
Se cita por primera vez para la flora adventicia de Sudamérica a Fatoua villosa (Moraceae), especie originaria de Asia tropical y Australia, sobre la base de ejemplares coleccionados en las provincias de Jujuy y Tucumán (Argentina). Este trabajo describe
Eva Bulacio, Alberto C. Slanis
doaj   +1 more source