Results 41 to 50 of about 397,235 (349)

Fatigue Reliability Prediction Method of Large Aviation Planetary System Based on Hierarchical Finite Element

Metals, 2022
The reliability of planetary equipment determines the economic affordability and service safety, to a large extent, for a helicopter transmission system.
Ming Li, Yuan Luo, Liyang Xie
doaj   +1 more source

Mechanical planetary compensating drive system [PDF]

, 1973
Drive enables two concentric output shafts to be controlled independently or rotated as a unit. Possible uses are pointing and tracking devices, rotary camera shutters with variable light control, gimbal systems with yaw and pitch movement, spectrometer ...
Gerdts, J. C., Jr., Zeiger, R. J.
core   +1 more source

On the HU Aquarii planetary system hypothesis

, 2012
In this work, we investigate the eclipse timing of the polar binary HU Aquarii that has been observed for almost two decades. Recently, Qian et al. attributed large (O-C) deviations between the eclipse ephemeris and observations to a compact system of ...
Beuermann, Klaus, Burwitz, Vadim, Gauza, Bartosz, Gozdziewski, Krzysztof, Haghighipour, Nader, Hinse, Tobias C., Kanbach, Gottfried, Maciejewski, Andrzej J., Nasiroglu, Ilham, Rau, Arne, Schwarz, Robert, Schwope, Axel D., Slonina, Mariusz, Slowikowska, Aga   +13 more
core   +1 more source

Dynamical Measurements of the Interior Structure of Exoplanets [PDF]

, 2013
Giant gaseous planets often reside on orbits in sufficient proximity to their host stars for the planetary quadrupole gravitational field to become non-negligible. In presence of an additional planetary companion, a precise characterization of the system'
Batygin, Konstantin, Becker, Juliette C.
core   +3 more sources

Dynamical Habitability of Planetary Systems [PDF]

Astrobiology, 2010
The problem of the stability of planetary systems, a question that concerns only multiplanetary systems that host at least two planets, is discussed. The problem of mean motion resonances is addressed prior to discussion of the dynamical structure of the more than 350 known planets.
Dvorak, Rudolf, Pilat-Lohinger, Elke, Bois, Eric, Schwarz, Richard, Funk, Barbara, Beichman, Charles, Danchi, William, Eiroa, Carlos, Fridlund, Malcolm, Henning, Thomas, Herbst, Tom, Kaltenegger, Lisa, Lammer, Helmut, Léger, Alain, Liseau, René, Lunine, Jonathan, Paresce, Francesco, Penny, Alan, Quirrenbach, Andreas, Röttgering, Huub, Selsis, Franck, Schneider, Jean, Stam, Daphne, Tinetti, Giovanna, White, Glenn J.   +24 more
openaire   +4 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Effect of pore structure on methane adsorption characteristics in tectonically deformed coals

Frontiers in Earth Science
The regulation of pore structure on methane adsorption and free state in tectonically deformed coals directly affects the efficiency of coalbed methane extraction and coal mine safety.
Peng Wang, Yiwen Ju, Chunhui Ren, Guofu Li, Lei Xiao, Wei Wang, Jian Gao, Renzhe Chen   +7 more
doaj   +1 more source

Development of fault diagnosis system for wind power planetary transmission based on labview

The Journal of Engineering, 2019
The article uses LabView to develop a fault diagnosis system for wind power planetary transmissions. First, use LabView software to create a signal acquisition system.
Zhihan Yang, Shaohong Wang, Chao Ma, Jingnan Huang   +3 more
doaj   +1 more source

Giant Planet Companion to 2MASSW J1207334-393254

, 2005
We report new VLT/NACO imaging observations of the young, nearby brown dwarf 2MASSW J1207334-393254 and its suggested planetary mass companion (2M1207 b).
A.-M. Lagrange, B. Zuckerman, Baraffe, Baraffe, Bate, Bouy, Burgasser, Burrows, C. Dumas, Chabrier, Chauvin, Close, Close, D'Antona, D. Mouillet, Epchtein, G. Chauvin, Gizis, Gizis, Gizis, Hambly, I. Song, J.-L. Beuzit, Kroupa, Low, Mamajek, Mohanty, Mohanty, Mohanty, Monet, Neuhäuser, P. Lowrance, Pollack, Reipurth, Schneider, Scholz, Song, Sterzik, Vrba, Véran, Zuckerman   +40 more
core   +3 more sources

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source