Results 101 to 110 of about 4,910 (302)
Climate change and perennial crop production: Evidence of yield impact and adaptation in California
American Journal of Agricultural Economics, EarlyView.Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen +2 more
wiley +1 more source
Nutation control during precession of a spin-stabilized spacecraft
, 1973 The effects of precession thrust pulses and energy dissipation upon nutation of a spin-stabilized spacecraft are studied. Methods for controlling nutation during a precession maneuver are proposed and examined.
Taylor, J. M., Donner, R. J.
core +2 more sources
Jixie chuandong, 2021 The contact characteristics of a nutation drive with double circular-arc spiral bevel gears are extremely sensitive to installation errors. To reveal the effects of installation errors on contact characteristics，the tooth surface contact analysis of ...
Qin Chen +4 more
doaj
Adaptive Single-Mode Fiber Coupling Method Based on Coarse-Fine Laser Nutation
IEEE Photonics Journal, 2018 One of the major restrictions of the free-space optical communication systems is the limitation of single-mode fiber (SMF) coupling efficiency that impacts the system performance.
Bo Li +4 more
doaj +1 more source
Structure Design and Magnetic Field Simulation of Non-contact Nutation Reduction Motor
Jixie chuandong, 2019 In order to solve the problem of weak stiffness of flexible wheels and more mechanical friction in existing robot harmonic reducer motors, a new type of nutation reducer motor is proposed by combining nutation deceleration motion with magnetic meshing ...
Xiaqi Shan +3 more
doaj
Testing a satellite automatic nutation control system
, 1974 Testing of a particular nutation control system for the synchronous meteorological satellite (SMS) is described. The test method and principles are applicable to nutation angle control for other satellites with similar requirements.
Hrasiar, J. A.
core
Journal of Applied Polymer Science, EarlyView.A comparative investigation of two epoxy additives derived from cardanol (NC513 and NC514s) for production of films based on poly (lactic acid) (PLA), acetyl tributyl citrate (ATBC), and poly (butylene adipate‐co‐terephthalate) (PBAT) clarified their distinct roles, with NC513 mainly acting as a plasticizer, reducing viscosity and enhancing ductility ...
Norma Mallegni +3 more
wiley +1 more source
Mass asymmetry and tricyclic wobble motion assessment using automated launch video analysis
Defence Technology, 2016 This paper describes an approach to identify epicyclic and tricyclic motion during projectile flight caused by mass asymmetries in spin-stabilized projectiles.
Ryan Decker +4 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
wiley +1 more source
The Electronic Spin State of Diradicals Obtained from the Nuclear Perspective: The Strange Case of Chichibabin Radicals. [PDF]
ChemphyschemThe electronic spin state of two Chichibabin radicals is investigated using 2‐dimensional hyperfine correlated Electron Nuclear Double Resonance. The protons (I=1/2) act as a reference for the electronic spin quantum number (S) via their hyperfine interactions.
Moise G +7 more
europepmc +2 more sources