Results 61 to 70 of about 16,789 (154)

A multiscale seasonal examination of the risk of harm to seabirds from vessels based on co‐occurrence in Alaskan waters

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Alaska's seascape supports globally significant seabird populations, including vulnerable and threatened species, and hosts economically important commercial fisheries and marine transportation corridors. Seasonal patterns of seabird movements and vessel traffic create a complex landscape of risk, defined as high levels of co‐occurrence ...
Kelly Kapsar   +2 more
wiley   +1 more source

Análisis semiológico de los Discursos del FMI y Fidel Castro

open access: yesChasqui, 2015
CHASQUI presenta aquí una rara pieza de información. Sobre la base de dos entrevistas exclusivas, una con el FMI y la otra de Fidel Castro acerca de la deuda externa, que marcan posiciones irreconciliables ideológicas y pragmáticas, que a simple vista ...
Hernán Puentes
doaj  

Satélites de comunicación

open access: yesChasqui, 2015
Parte de que los satélites de comunicación son unos artilugios recién nacidos y en fase de desarrolllo. Describe la trayectoria histórica de éstos tres, el uso del satélite y el servicio de televisión, las redes, el HISPASAT enlace entre España y América
Francisco Sacristán Romero
doaj   +1 more source

Ciudades satélites periurbanas en Santiago de Chile: paradojas entre la satisfacción residencial y precariedad económica del periurbanita de clase media

open access: yes, 2015
La expansion periurbana de Santiago de Chile se relaciona al desarrollo de ciudades satelites privadas. Los proyectos construidos en la comuna de Lampa resultan interesantes de analizar dado que dan cuenta de la periurbanizacion de grupos socioeconomicos
César Cáceres Seguel
semanticscholar   +1 more source

Risks of Time and Chronology as an Underpinning Infrastructure for Critical Systems: Emerging Chronorisks and Chronosecurity Needs

open access: yesJournal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.
ABSTRACT Time and chronology form the invisible architecture upon which modern civilization depends, governing synchronization across markets, power grids, communication networks, transportation, and defense. Yet, this shared temporal framework, engineered through atomic clocks, satellites, and digital synchronization, faces growing vulnerabilities ...
Bilal M. Ayyub
wiley   +1 more source

AVALIAÇÃO DA TEMPERATURA DE BRILHO NOS CANAIS SENSÍVEIS À SUPERFÍCIE TERRESTRE NO SISTEMA G3DVAR DO CPTEC/INPE: SÉRIE NOAA

open access: yesRevista Brasileira de Meteorologia, 2015
As medidas do AMSU-A para os canais que são sensíveis à superfície terrestre sobre os continentes não tem sido amplamente utilizadas para ajustar a previsão numérica de tempo de curto prazo (PNTs), devido à complexidade das características da superfície ...
BRUNNA ROMERO PENNA   +3 more
doaj   +1 more source

Effect of Land Cover Type on 3D Deformation Recovery From Synthetically Deformed High Resolution Satellite Optical Imagery

open access: yesEarth and Space Science, Volume 13, Issue 1, January 2026.
Abstract The limits of detection for earthquake surface deformation in the spatial domain have improved with advances in remote sensing imagery data availability, resolution, and analysis. Sub‐pixel correlation and digital elevation model (DEM) differencing from sub‐meter, earthquake‐spanning satellite optical imagery has enhanced surface rupture ...
C. Hanagan, S. B. DeLong, N. G. Reitman
wiley   +1 more source

Geopolítica del Espacio Exterior [PDF]

open access: yesRevista UNISCI
En el campo militar hemos pasado a considerar el espacio como un dominio más, a añadir a los tradicionales (tierra, mar y aire, y, si acaso, el ciberespacio).
Josep Baqués Quesada
doaj  

Planificación de posicionamiento satelital multiconstelación en entornos urbanos

open access: yesRevista UIS Ingenierías, 2019
Un posicionamiento mediante un servicio GNSS (sistema global de navegación por satélite) solo es posible con la recepción simultánea de la señal de al menos cuatro satélites.
Michael S. Puentes   +3 more
doaj   +1 more source

Seismo‐Acoustic Detection and Localization of Iceberg Collapse in Atka Bay, Antarctica

open access: yesGeophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract On 12 January 2022, an iceberg collapsed at the edge of frozen Atka Bay, Antarctica. The event generated seismic, hydroacoustic, and atmospheric infrasound waves recorded by a local network comprising land‐ and iceshelf‐based seismometers, an underwater hydrophone, and an on‐ice infrasound array.
G. Averbuch   +5 more
wiley   +1 more source

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