Results 11 to 20 of about 20,670,757 (294)

Low-cost, multi-agent systems for planetary surface exploration [PDF]

, 2012
The use of off-the-shelf consumer electronics combined with top-down design methodologies have made small and inexpensive satellites, such as CubeSats, emerge as viable, low-cost and attractive space-based platforms that enable a range of new and ...
Punzo, Giuliano, Macdonald, Malcolm, Dobie, Gordon, Jamieson, Jonathan, Bennet, Derek James   +4 more
core   +3 more sources

Misalignment diagnosis of a planetary gearbox based on vibration analysis [PDF]

, 2014
As a critical power transmission system, planetary gearbox is widely used in many industrial important machines such as wind turbines, aircraft turbine engines, helicopters.
Gu, Fengshou, Ball, Andrew, Zhen, Dong, Abdalla, Gaballa, Tian, Xiange   +4 more
core   +3 more sources

Summary of the Third International Planetary Dunes Workshop: Remote Sensing and Image Analysis of Planetary Dunes, Flagstaff, Arizona, USA, June 12-15, 2012 [PDF]

, 2013
The Third International Planetary Dunes Workshop took place in Flagstaff, AZ, USA during June 12-15, 2012. This meeting brought together a diverse group of researchers to discuss recent advances in terrestrial and planetary research on aeolian bedforms.
Yizhaq, Hezi, Chojnacki, Matthew, Bishop, Mark Ashley, Bishop, Marc A., Tirsch, Daniela, Neakrase, Lynn D. V., Bourke, Mary C., Newman, Claire E., Rubin, Dave M., Zimbelman, James R., Dinwiddie, Cynthia L., Horgan, Briony H., Neakrase, Lynn D.V., Hayward, Rosalyn K., Michaels, Timothy I., Bishop, Mark A., Zimbleman, James R., Horgan, Briony H. N., Burr, Devon M., Titus, Timothy N., Fenton, Lori K., Fenton, Lori, Kerber, Laura, Le Gall, Alice, Rubin, David M.   +24 more
core   +1 more source

Early Water Delivery to Terrestrial Planet Regions during the Stages of Jupiter’s Formation and Migration in the Grand Tack Model

The Planetary Science Journal, 2023
The formation and subsequent migration of gas giants could significantly affect the material mixing in the solar system. In this study, we use N -body simulations to investigate how much water is transported into the region of the terrestrial planet ...
Masahiro Ogihara, Hidenori Genda, Yasuhito Sekine   +2 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). IV. The Ringed and Warped Structure of the Disk around the Class I Protostar L1489 IRS

The Astrophysical Journal, 2023
Constraining the physical and chemical structure of young embedded disks is crucial for understanding the earliest stages of planet formation. As part of the Early Planet Formation in Embedded Disks Atacama Large Millimeter/submillimeter Array Large ...
Yoshihide Yamato, Yuri Aikawa, Nagayoshi Ohashi, John J. Tobin, Jes K. Jørgensen, Shigehisa Takakuwa, Yusuke Aso, Jinshi Sai (Insa Choi), Christian Flores, Itziar de Gregorio-Monsalvo, Shingo Hirano, Ilseung Han, Miyu Kido, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Jeong-Eun Lee, Zhi-Yun Li, Zhe-Yu Daniel Lin, Leslie W. Looney, Shoji Mori, Suchitra Narayanan, Nguyen Thi Phuong, Kazuya Saigo, Alejandro Santamaría-Miranda, Rajeeb Sharma, Travis J. Thieme, Kengo Tomida, Merel L. R. van ’t Hoff, Hsi-Wei Yen   +30 more
doaj   +1 more source

Planetary population synthesis and the emergence of four classes of planetary system architectures [PDF]

, 2023
Planetary population synthesis is a helpful tool to understand the physics of planetary system formation. It builds on a global model, meaning that the model has to include a multitude of physical processes. The outcome can be statistically compared with
Burn, Remo, Mordasini, C., Emsenhuber, A., Mordasini, Christoph, Emsenhuber, Alexandre, Burn, R.   +5 more
core   +1 more source

Pitting damage levels estimation for planetary gear sets based on model simulation and grey relational analysis [PDF]

, 2011
The planetary gearbox is a critical mechanism in helicopter transmission systems. Tooth failures in planetary gear sets will cause great risk to helicopter operations.
Gu, Fengshou, Hu, Niaoqing, Cheng, Zhe, Qin, Guojun   +3 more
core   +3 more sources

Theoretical models of planetary system formation: mass vs. semi-major axis [PDF]

, 2013
Context. Planet formation models have been developed during the past years to try to reproduce what has been observed of both the solar system and the extrasolar planets.
F. Carron, Alibert, Yann, Pfyffer, S., Carron, F., W. Benz, Y. Alibert, Swoboda, David, Fortier, A., Alibert, Y., A. Fortier, Benz, Willy, Mordasini, Christoph, D. Swoboda, Pfyffer, Samuel Moses, S. Pfyffer, Mordasini, C., Fortier, Andrea, Benz, W., C. Mordasini, Pfyffer, Samuel, Carron, Frédéric, Swoboda, D.   +21 more
core   +4 more sources

Diagnosis of Combination Faults in a Planetary Gearbox using a Modulation Signal Bispectrum based Sideband Estimator [PDF]

, 2015
This paper presents a novel method for diagnosing combination faults in planetary gearboxes. Vibration signals measured on the gearbox housing exhibit complicated characteristics because of multiple modulations of concurrent excitation sources, signal ...
Gu, Fengshou, Rehab, Ibrahim, Ball, Andrew, Abdallaa, Gaballa M., Tian, Xiange   +4 more
core   +4 more sources

Long extra-tropical planetary wave propagation in the presence of slowly varying mean flow and bottom topography. II: ray propagation and comparison with observations [PDF]

, 2003
Ray theory is used to predict phase and group velocities for long planetary waves under realistic, albeit slowly varying, oceanic conditions. The results are compared with local theory using fields smoothed to the same amount (9° latitude/longitude) as ...
Killworth, Peter D., Marchesiello, Patrick, Blundell, Jeffrey R., Killworth, P.D., Peter D. Killworth, Shchepetkin, Alexander, Mcwilliams, James, C., Jeffrey R. Blundell, Mcwilliams, James,, Blundell, J.R.   +9 more
core   +1 more source