Results 61 to 70 of about 1,052,332 (366)
Evolution of planetary systems in resonance [PDF]
Astronomy & Astrophysics, 2004 We study the time evolution of two protoplanets still embedded in a protoplanetary disk. The results of two different numerical approaches are presented and compared. In the first approach, the motion of the disk material is computed with viscous hydrodynamical simulations, and the planetary motion is determined by N-body calculations including exactly
Geoffrey Bryden +2 more
openaire +3 more sources
Advanced Engineering Materials, EarlyView.This study explores a process chain to produce dispersoid‐strengthened CuCr1Zr for applications requiring high strength and conductivity. Using gas‐atomized powder and copper‐plated alumina nanoparticles, additive manufacturing is performed via powder bed based additive manufacturing with green and red lasers, followed by heat treatment.
Heinrich von Lintel +7 more
wiley +1 more source
Robo-AO Kepler Survey IV: the effect of nearby stars on 3857 planetary candidate systems [PDF]
, 2018 We present the overall statistical results from the Robo-AO Kepler planetary candidate survey, comprising of 3857 high-angular resolution observations of planetary candidate systems with Robo-AO, an automated laser adaptive optics system.
Baranec, Christoph +9 more
core +3 more sources
, 2013 Extensive photometric stellar surveys show that many main sequence stars show emission at infrared and longer wavelengths that is in excess of the stellar photosphere; this emission is thought to arise from circumstellar dust. The presence of dust disks is confirmed by spatially resolved imaging at infrared to millimeter wavelengths (tracing the dust ...
openaire +3 more sources
Advanced Engineering Materials, EarlyView.In this study, the effect of specific ball‐milling energy (SBME) on the mechanical and corrosion properties of graphene nanoplatelets (GNPs) Zn matrix composites is presented. GNPs are uniformly dispersed in the Zn powder mixtures at the optimal SBME of 32.82 kJ g−1.
Humayun Kabir +3 more
wiley +1 more source
Applied SciencesIn this paper, the graph theory model of the kinematics of the double internal meshing planetary gear is established by splitting the k value of the planetary gear, the system matrix of the dual-state logic planetary gear transmission is assembled, the ...
Qiang Zhang +4 more
doaj +1 more source
Binarity of Transit Host Stars - Implications on Planetary Parameters [PDF]
, 2009 Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters. Discovering a transit host star to be multiple leads to a necessary revision of the derived stellar and planetary parameters.
arxiv +1 more source
Stability and Formation of the Resonant System HD 73526 [PDF]
, 2007 Based on radial velocity measurements it has been found recently that the two giant planets detected around the star HD 73526 are in 2:1 resonance. However, as our numerical integration shows, the derived orbital data for this system result in chaotic ...
Beaugé +26 more
core +2 more sources
Hybrid Framework Materials: Next‐Generation Engineering Materials
Advanced Engineering Materials, EarlyView.Hybrid organic–inorganic materials merge the unique properties of organic and inorganic compounds, enabling applications in optoelectronics, gas storage, and catalysis. This review explores metal‐organic frameworks, hybrid organic–inorganic perovskites, and the emerging field of hybrid glasses, emphasizing their structures, functionalities, and ...
Jay McCarron +2 more
wiley +1 more source
Backlash Analysis of Gear Transmission of Parallel Uniform Planetary Gear
Jixie chuandong, 2018 Based on the NGW planetary gear transmission system,a gear transmission of parallel uniform planetary gear is proposed to reduce the transmission error of asteroid transmission system and improve its transmission accuracy.
Guo Jing +3 more
doaj