Results 51 to 60 of about 5,177 (104)

Las plantas: esperanza energética

Ciencias Ambientales, 1981
No disponible/Not ...
William D. Miller, L.W. Hillen, Paulo de T. Alium, Melvin Calvin, Gene E. Calvin, Afranio Aragao Craveiro   +5 more
doaj   +1 more source

Automatic identification of streamlined subglacial bedforms using machine learning: an open‐source Python approach

Boreas
Subglacial processes exert a major control on ice streaming. Constraining subglacial conditions thus allows for more accurate predictions of ice mass loss. Due to the difficulty in observing large‐scale conditions of the modern subglacial environment, we
Ellianna Abrahams, Marion McKenzie, Fernando Pérez, Ryan Venturelli   +3 more
doaj   +1 more source

Ecoturismo, ambiente y desarrollo local en Monteverde

Ciencias Ambientales, 2006
Se presenta los resultados de un estudio que procuró definir el potencial de la riqueza natural, y otros determinantes, en la formación y desarrollo del cluster ecoturístico en Monteverde (Costa Rica): Se muestra el aprovechamiento económico exitoso de ...
Marvin Acuña, Daniel Villalobos, Keynor Ruiz   +2 more
doaj   +1 more source

Automated delineation and morphometry of unclassified subglacial bedforms

Boreas
We designed an automated tool to delineate and analyse the shape of subglacial bedforms using a recently defined land surface parameter, the volumetric obscurance.
Sofyane Hesni, Paul Bessin, Edouard Ravier, Olivier Bourgeois, Jean Vérité, Jean‐François Buoncristiani   +5 more
doaj   +1 more source

Validación de método para determinar niveles de SO42-, NO3-, Cl- y C2O42- en material particulado PM-10 en San José

Ciencias Ambientales, 2004
Se validó un método para la determinación de los niveles de nitrato, sulfato, cloruro y oxalato presentes en el material particulado PM-10 colectado del aire ambiente del centro de la ciudad de San José.
Susana Rodríguez, Jorge Herrera
doaj   +1 more source

An inventory of subglacial overdeepenings in southern Germany and Austria

Boreas
Subglacial overdeepenings are of interest for a number of applied and academic reasons, for example as groundwater reservoirs or as sedimentary archives of environmental change.
Lukas Gegg, Bernhard C. Salcher, Thomas Pollhammer, Denis Cohen, Urs H. Fischer, Angela Landgraf   +5 more
doaj   +1 more source

Turismo, motor de crecimiento y desarrollo de Costa Rica

Ciencias Ambientales, 2006
Se pondera la influencia que sobre la economía de Costa Rica tiene el sostenido crecimiento del turismo: ingreso de divisas, generación de empleo, estímulo a la inversión en diversos sectores…; también se menciona los impactos negativos ambientales y ...
Marco Otoya
doaj   +1 more source

Subtle relict channels associated with large dolines in an area formerly beneath the Laurentide Ice Sheet, northern Ohio, USA

Boreas
Low‐relief dry channels are observed across the Bellevue‐Castalia Karst Plain of north‐central Ohio, USA. The area was repeatedly glaciated, and the channel forms are of interest because the linear pattern may be related to glacial processes.
Timothy G. Fisher, Douglas J. Aden, Brittany D. Parrick, Kennedy O. Doro, Ira D. Sasowsky, Tyler A. Norris, Giorgi Chartolani   +6 more
doaj   +1 more source

Ecología y migraciones de la lapa verde

Ciencias Ambientales, 2004
La lapa verde (Ara ambigua) es una especie que realiza mi-graciones temporales altitudinales entre su zona de anida-miento en las llanuras del norte del Caribe costarricense y su zona de post-anidamiento,especialmente en las faldas norteñas de la ...
Olivier Chassot, Guiselle Monge, Ulises Alemán, George Powell, Suzanne Palminteri   +4 more
doaj   +1 more source

Subglacial landscape formation and sediment discharge: relating basal conditions to bedform dimensions and properties at Rutford Ice Stream, West Antarctica

Boreas
Basal conditions that facilitate fast ice flow are still poorly understood and their parameterization in ice‐flow models results in high uncertainties in ice‐flow and consequent sea‐level rise projections.
Rebecca Schlegel, Lucas K. Zoet, Adam D. Booth, Andrew M. Smith, Roger A. Clark, Alex M. Brisbourne   +5 more
doaj   +1 more source