Results 71 to 80 of about 3,808 (243)
Potential Capabilities of Lunar Laser Ranging for Geodesy and Relativity
, 2005 Lunar Laser Ranging (LLR), which has been carried out for more than 35 years, is used to determine many parameters within the Earth-Moon system. This includes coordinates of terrestrial ranging stations and that of lunar retro-reflectors, as well as ...
Mueller, Juergen +3 more
core +2 more sources
An active nutation damper for spacecraft [PDF]
, 1977 An active nutation damping device, consisting of an angular accelerometer, a dc-motor-driven flywheel, and associated electronics, developed for spacecraft use is described.
Abercrombie, R. A., Flatley, T. W.
core +3 more sources
British Educational Research Journal, EarlyView.Abstract This paper explores the challenges and opportunities surrounding the recruitment and retention of minority ethnic teachers in England. Drawing on interview data from 33 teachers and school leaders of diverse ethnic backgrounds, it investigates whether racialised barriers identified in earlier research have shifted in the current context of ...
Antonina Tereshchenko +5 more
wiley +1 more source
Polynomial expressions for planetary equators orbit elements in relationship to earth mean 1950.0 coordinate system [PDF]
Polynomial expressions for planetary equators and orbit elements in relationship to earth coordinate ...
Sturms, F. M., Jr.
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Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade
Biological Reviews, EarlyView.ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan +2 more
wiley +1 more source
The dynamics and optimal control of spinning spacecraft and movable telescoping appendages, part A [PDF]
The problem of optimal control with a minimum time criterion as applied to a single boom system for achieving two axis control is discussed. The special case where the initial conditions are such that the system can be driven to the equilibrium state ...
Bainum, P. M., Sellappan, R.
core +1 more source
Orchard netting impacts on biodiversity leading to cascading effects at the ecosystem level
Biological Reviews, EarlyView.ABSTRACT Agriculture must ensure food production without further compromising the ecosystem functions upon which it depends. Agricultural practices should therefore avoid harming farmland biodiversity, especially of taxa that supply the key ecosystem services (e.g.
Corrado Alessandrini +13 more
wiley +1 more source
Distributed earth model/orbiter simulation [PDF]
Distributed Earth Model/Orbiter Simulation (DEMOS) is a network based application developed for the UNIX environment that visually monitors or simulates the Earth and any number of orbiting vehicles. Its purpose is to provide Mission Control Center (MCC)
Geisler, Erik +2 more
core +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT This study analyzed Industry 4.0 (I4.0) technology applications in agribusiness and the role of strategic stakeholders, engagement methods, and other critical aspects data sharing, confidentiality, integrity, decision‐making, and sector‐specific requirements in promoting circularity.
Simone Sehnem +3 more
wiley +1 more source
Dynamic simulation analysis of single-stage double-arc spiral bevel gear nutation drive
Journal of Physics: Conference SeriesAbstract The single-stage double circular-arc spiral bevel gear nutation drive, primarily composed of a pair of nutation bevel gears and a ball-cage type constant velocity joint, exhibits advantages of compact structure and high transmission ratio.
Zheng Lin, Ligang Yao, Xiaojie Wu
openaire +1 more source