Results 141 to 150 of about 688,541 (286)

Coordinate transformation method for beam grazing angle calculation of space-based early warning radar. [PDF]

Sci Rep
Huang X, Zhang Y.
europepmc   +1 more source

Drag-free Satellite Simulator

Drag-free Satellite Simulator
We have been investigating a possibility of launching a satellite in a planetary orbit to test the general theory of relativity. As a first step of it, we have fabricated a drag-free system model for a laboratory simulation in order to acquire the fundamental technique and find unexpected problems.
openaire   +1 more source

Experimental and field evidence indicate that islet‐nesting tundra birds experience reduced nest predation and benefit indirectly from high snow goose densities

Oikos, EarlyView.
Landscape features can shape the occurrence and strength of predator–prey interactions by influencing predation risk and prey distribution. In the High Arctic, some bird species select nesting sites with physical features that impede access for their main terrestrial predator, the Arctic fox.
Marylou Beaudoin, Andréanne Beardsell, Éliane Duchesne, Madeleine‐Zoé Corbeil‐Robitaille, Pierre Legagneux, Dominique Berteaux, Joël Bêty   +6 more
wiley   +1 more source

A Survey of Current Operations-Ready Thermospheric Density Models for Drag Modeling in LEO Operations. [PDF]

J Astronaut Sci
Mutschler S, Pilinski M, Bruinsma S, Sutton E, Tobiska WK, Knipp D, Fang TW, Casali S, Mallik V, DiLorenzo B, Siemes C.   +10 more
europepmc   +1 more source

A tipping point for tipping points

Oikos, EarlyView.
Tipping points (TPs) – often understood as abrupt changes to a system – have become a popular framework for ecology and environmental science across spatial and temporal scales. The underlying, quantitative foundation of TP theory is built on mathematical models from catastrophe and predator–prey theories.
David G. Jenkins, Alexandria G. Lacoursière   +1 more
wiley   +1 more source

The quest and opportunities for air-breathing propulsion. [PDF]

NPJ Microgravity
Duppada GS, Taploo A, Zhuang T, Spinelli J, Keidar M.   +4 more
europepmc   +1 more source

Digital surveillance of animals and nature recovery

People and Nature, EarlyView.
Abstract Digital surveillance technologies (DSTs) are widely applied in nature recovery for their potential to generate novel data on species and ecosystems through digital tracking, automation (e.g. from hazardous locations) and from newly recruited citizen scientists.
William M. Adams
wiley   +1 more source

Mechanical analysis of skier activity in giant slalom. [PDF]

PLoS One
Hladnik J, Dražumerič R, Petrović I, Bon I, Očić M, Cigrovski V, Jerman B.   +6 more
europepmc   +1 more source

Belief and the beast: Religion and attitudes towards tigers in Central India

People and Nature, EarlyView.
Abstract Human perceptions of wildlife are critical to shaping conservation outcomes, particularly in landscapes where people coexist with large carnivores. Religion, a deeply rooted sociocultural force, remains underexplored in the context of human–wildlife conflict.
Sathvika Krishnan, Poonam Dhanwatey, Harshwardhan Dhanwatey, Andrew Gosler, Claudio Sillero‐Zubiri   +4 more
wiley   +1 more source

The dynamic response of Pine Island Glacier to two decades of intermittent ice shelf regrounding. [PDF]

Nat Commun
Surawy-Stepney T, Wallis BJ, Hogg AE, Joughin I, Cornford SL, Dutrieux P.   +5 more
europepmc   +1 more source