Results 111 to 120 of about 3,516,371 (307)
Dynamics of [WR] Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 2003 The formation of PNe around [WC] stars is modelled with a numerical hydrodynamics code. It is found that the PN around [WC] are expected to expand faster, and be more turbulent. It is shown that the observed lack of differences with ‘normal’ PNe, can have implications for models of the origin of asphericity in PNe.
openaire +1 more source
Complex dynamics of planetary gear systems
, 2014 A full 2D dynamic model of a single-stage planetary gear system with backlash and time varying stiffness is considered here. This dynamic model is time variant and non-smooth, due to the presence of time varying meshing stiffness and backlash for all sun-
PELLICANO, Francesco +2 more
core
The structure and thermal tectonics of planetary lithospheres : mid-ocean ridges and lunar impact basins [PDF]
, 1985 Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1985.Vita.Includes bibliographies.by Steven Richard Bratt.Ph ...
Bratt, Steven Richard
core
FiN‐Kiri: Fabric‐Based Inflatable Kirigami Actuator for Multimodal Soft Robots
Advanced Robotics Research, EarlyView.This study introduces a type of inflatable fabric‐based kirigami actuator capable of performing bending motion. The actuator is utilized as soft grippers, a crawling robot and a swimming robot. The crawling robot demonstrated extraordinary motion capabilities, such as moving forward, turning and navigating a narrow tunnel.
Yang Yu +12 more
wiley +1 more source
Jixie chuandong, 2018 Aiming at the problem of the low efficiency of NGWN-type planetary gear transmission with high speed ratio,the low-loss gear design that is optimizing modification coefficients and addendum coefficients simultaneously,reducing the contact ratio to reduce
Wang Jianxiang, Qin Datong
doaj
Middle to late Holocene cooling and increased zonal asymmetry in the mid-latitude North Atlantic [PDF]
Climate of the PastSea Surface Temperature reconstructions derived from alkenone biomarker (SST-alk) reveal a cooling trend in the North Atlantic during the late Holocene (the last 5000 years), contrary to the warming simulated by transient climate models driven by 20 ppm ...
W. Si, T. Herbert, J. R. Toggweiler
doaj +1 more source
, 2015 A groundbreaking collection that pursues the rise of geoculture as an essential framework for arts criticism, The Planetary Turn shows how the planet—as territory, sociopolitical arena, space of interaction for life, and artistic theme—is increasingly ...
Moraru, Christian,editor. +1 more
core +1 more source
Stiffness‐Programmable Origami Robots With Tendon‐Driven Actuation via Multimaterial 3D Printing
Advanced Robotics Research, EarlyView.Motion diversity is achieved in a tendon‐driven origami robot through programmable stiffness rather than modified actuation. Multimaterial 3D printing embeds soft creases, modular inserts redirect identical tendon inputs into distinct behaviors, and variable‐stiffness inserts enable real‐time switching.
Elisha Lerner, Jianguo Zhao
wiley +1 more source
Jixie chuandong, 2014 For solving the problem of correct position in planetary gear mechanism,aiming at the interference problem of planetary mechanism for single planetary gear,the basic method of aligning the planes and confirming the assembly relationship is proposed ...
田雨, 何卫东, 张迎辉, 吴鑫辉
doaj
Journal of Advances in Modeling Earth SystemsA simple analytical model, the zero‐buoyancy plume (ZBP) model, has been proposed to understand how small‐scale processes such as plume‐environment mixing and evaporation affect the steady‐state structure of the atmosphere.
Zeyuan Hu +2 more
doaj +1 more source