Results 31 to 40 of about 21,151,583 (337)

The Secular Evolution and Dynamical Architecture of the Neptunian Triplet Planetary System HD 69830 [PDF]

, 2006
We perform numerical simulations to study the secular orbital evolution and dynamical structure in the HD 69830 planetary system, using the best-fit orbital solutions by Lovis and coworkers.
J. Ji, H. Kinoshita, Lin Liu, Guang-Yu Li   +3 more
semanticscholar   +1 more source

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   +2 more sources

Apophis planetary defense campaign [PDF]

, 2022
We describe results of a planetary defense exercise conducted during the close approach to Earth by the near-Earth asteroid (99942) Apophis during 2020 December–2021 March. The planetary defense community has been conducting observational campaigns since
Mastaler, Ron A., Kim, Dong-Heun, Lees, Robert C., Brozovic, Marina, Weryk, Robert, Bauer, James, Polishook, David, Petrescu, Elisabeta, Farnocchia, Davide, Heinze, Aren N., Wainscoat, Richard, Warner, Elizabeth, Satpathy, Akash, Dotson, Jessie, Balam, David, McMillan, Robert S., Roh, Dong-Goo, Dróżdż, Marek, Ogłoza, Waldemar, Janse van Rensburg, Petro, Mathias, Donovan L., Bell, David, Elenin, Leonid, Buzzi, Luca, Tonry, John L., Glamazda, Dmitry, Moon, Hong-Kyu, Masiero, Joseph, Bressi, Terry H., Choi, Young-Jun, Weiland, Henry J., Erece, Orhan, Tubbiolo, Andrew F., Erasmus, Nicolas, Reva, Inna, Kelley, Michael S., Denneau, Larry, Medeiros, Hissa, Jacques, Cristovao, Schmalz, Sergei, Morate, David, Naidu, Shantanu P., Read, Mike T., Nastasi, Alessandro, Zhornichenko, Anastasiya, Pál, András, Cano, Juan, Reichart, Daniel E., Perminov, Alexander, Barnardi, Fabrizio, Wheeler, Lorien F., Chingis, Omarov, Serebryanskiy, Aleksander, Licandro, Javier, Marsset, Michael, Mainzer, Amy, Larsen, Jeffrey A., Holman, Matthew J., Pérez-Toledo, Fabricio, Michel, Patrick, Rumpf, Clemens, Wiebe, Yulia, Kiss, Csaba, Scotti, James V., Bamberger, Daniel, Lee, Hee-Jae, Marciniak, Anna, Cennamo, Ramona, Serra-Ricart, Miquel, Kim, Myung-Jin, Reddy, Vishnu, Kokina, Tatiana, Szakáts, Robert, Żejmo, Michał, Cantillo, David, Kamiński, Krzysztof, Mokhnatkin, Artem, Kamińska, Monika K., Wells, Guy, Alarcon, Miguel R., Ivanov, Alexander, Chastel, Serge, Veres, Peter, Graziani, Filippo, Sonbas, Eda, Taylor, Patrick A., Kaplan, Murat, de León, Julia, Benner, Lance A. M., Novichonok, Artem, Popescu, Marcel, Zoła, Stanisław, Micheli, Marco, Falco, Carmelo, Christensen, Eric, Kaiser, Galina, Kuznetsov, Eduard, Brucker, Melissa J., Yim, Hong-Suh, Faggioli, Laura, Alarcon, M.R., Scotti, J. V., Kelley, M. S., Taylor, P. A., Licandro, J., Kiss, C., Bressi, T. H., Falco, C., Nastasi, A., Ivanov, A., Kuznetsov, E., Farnocchia, D., Yim, H. -S., Pérez-Toledo, F., Rumpf, C., Christensen, E., Wheeler, L.F., Kamińska, M. K., Schmalz, S., Graziani, F., Holman, M.J., Naidu, S.P., Mastaler, R.A., Kaiser, G., Tonry, J.L., Mainzer, A., Dróżdż, M., van Rensburg, P.J., Micheli, M., Perminov, A., Novichonok, A., Zhornichenko, A., Glamazda, D., Wheeler, L. F., Elenin, L., Weiland, H. J., Kim, M.-J., Polishook, D., McMillan, R.S., Serebryanskiy, A., Roh, D.-G., Mathias, D. L., Kaplan, M., Lees, R.C., Ogłoza, W., Kim, M. -J., Larsen, J.A., Cennamo, R., Choi, Y. -J., Kokina, T., Heinze, A. N., Petrescu, E., Benner, L.A.M., Dotson, J., Kim, D.-H., Faggioli, L., de León, J., Larsen, J. A., Weiland, H.J., Bauer, J., Erece, O., Wells, G., Medeiros, H., Weryk, R., Lee, H. -J., Bamberger, D., Yim, H.-S., Reva, I., Sonbas, E., Pál, A., Heinze, A.N., Moon, H.-K., Kim, D. -H., Roh, D. -G., Cantillo, D., Brucker, M.J., Alarcon, M. R., Satpathy, A., Popescu, M., Lees, R. C., Mastaler, R. A., Mathias, D.L., Erasmus, N., Moon, H. -K., Taylor, P.A., Reichart, D.E., Mokhnatkin, A., Morate, D., Żejmo, M., Veres, P., Chingis, O., Naidu, S. P., Scotti, J.V., Read, M. T., Szakáts, R., Tubbiolo, A.F., Barnardi, F., Balam, D., Read, M.T., Chastel, S., Kamińska, M.K., Warner, E., Reichart, D. E., Brozovic, M., Tubbiolo, A. F., Wainscoat, R., Benner, L. A. M., Holman, M. J., Denneau, L., Bell, D., Marsset, M., McMillan, R. S., Jacques, C., Reddy, V., Zoła, S., Cano, J., Wiebe, Y., Tonry, J. L., Lee, H.-J., Bressi, T.H., van, Rensburg, P. J., Kelley, M.S., Choi, Y.-J., Serra-Ricart, M., Kamiński, K., Masiero, J., Brucker, M. J., Marciniak, A., Buzzi, L., Michel, P., David Polishook, Robert Weryk, Artem Novichonok, David Cantillo, Matthew J. Holman, Daniel E. Reichart, Elisabeta Petrescu, Vishnu Reddy, Alessandro Nastasi, Leonid Elenin, Young-Jun Choi, Amy Mainzer, Murat Kaplan, Marco Micheli, Michael S. Kelley, Elizabeth Warner, Krzysztof Kamiński, Dong-Goo Roh, Robert Szakáts, Hee-Jae Lee, Alexander Perminov, Robert S. McMillan, Eda Sonbas, Artem Mokhnatkin, Marek Dróżdż, Lorien F. Wheeler, Petro Janse van Rensburg, Clemens Rumpf, Shantanu P. Naidu, Sergei Schmalz, Hong-Suh Yim, Dong-Heun Kim, Monika K. Kamińska, Hissa Medeiros, Stanisław Zoła, Terry H. Bressi, Carmelo Falco, Aren N. Heinze, Donovan L. Mathias, Robert C. Lees, Patrick Michel, Alexander Ivanov, Myung-Jin Kim, Michał Żejmo, Jeffrey A. Larsen, Ramona Cennamo, Javier Licandro, Yulia Wiebe, James V. Scotti, Dmitry Glamazda, David Morate, Henry J. Weiland, Luca Buzzi, Joseph Masiero, Miguel R. Alarcon, Inna Reva, András Pál, Fabrizio Barnardi, Jessie Dotson, Hong-Kyu Moon, Daniel Bamberger, Serge Chastel, Andrew F. Tubbiolo, Cristovao Jacques, Omarov Chingis, John L. Tonry, Lance A. M. Benner, Filippo Graziani, Guy Wells, Orhan Erece, Anastasiya Zhornichenko, David Bell, Julia de León, Peter Veres, Tatiana Kokina, Csaba Kiss, Eduard Kuznetsov, Michael Marsset, Juan Cano, Galina Kaiser, Davide Farnocchia, Melissa J. Brucker, Nicolas Erasmus, Waldemar Ogłoza, Akash Satpathy, Fabricio Pérez-Toledo, Mike T. Read, Laura Faggioli, Patrick A. Taylor, Anna Marciniak, Marina Brozovic, Eric Christensen, Aleksander Serebryanskiy, David Balam, Marcel Popescu, Miquel Serra-Ricart, James Bauer, Richard Wainscoat, Ron A. Mastaler, Larry Denneau   +329 more
core   +1 more source

Tidal Evolution of the Planetary System around HD 83443 [PDF]

, 2001
Two planets with an orbital period ratio of approximately 10 : 1 have been discovered around the star HD 83443. The inner and more massive planet, HD 83443b, has the smallest semimajor axis among all currently known exoplanets.
Yan-Qin Wu, P. Goldreich
semanticscholar   +1 more source

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, Blundell, J.R.   +8 more
core   +1 more source

The evolution of planetary nebulae [PDF]

Astronomy & Astrophysics, 2010
By means of hydrodynamical models we do the first investigations of how the properties of planetary nebulae are affected by their metal content and what can be learned from spatially unresolved spectrograms of planetary nebulae in distant stellar systems.
Schönberner, D., Jacob, R., Sandin, C., Steffen, M.   +3 more
openaire   +2 more sources

A New Health Condition Detection Method for Planetary Gears Based on Modified Distributed Compressed Sensing and Multiscale Symbol Dynamic Entropy

Shock and Vibration, 2021
Planetary gear transmission system is an important transmission part of large machinery and is prone to failure. Aiming at the problem of how to extract fault information from vibration signals of nonlinear and nonstationary planetary gearboxes, a ...
Zhe Wu, Qiang Zhang, Zeyu Ma, Jialong Lu, Zhiying Qin   +4 more
doaj   +1 more source

A study of symplectic integrators for planetary system problems: error analysis and comparisons [PDF]

, 2016
The symplectic Wisdom-Holman map revolutionized long-term integrations of planetary systems. There is freedom in such methods of how to split the Hamiltonian and which coordinate system to employ, and several options have been proposed in the literature.
David M. Hernandez, W. Dehnen
semanticscholar   +1 more source

Solar System evolution from compositional mapping of the asteroid belt [PDF]

Nature, 2014
Advances in the discovery and characterization of asteroids over the past decade have revealed an unanticipated underlying structure that points to a dramatic early history of the inner Solar System.
F. DeMeo, B. Carry
semanticscholar   +1 more source

ANTARCTICA: A TREASURE–TROVE FOR PLANETARY SCIENCES. AUSTRALASIAN MICROTEKTITES FROM EAST ANTARCTICA [PDF]

, 2020
The planetary science community has benefitted greatly from research in Antarctica. The discovery of large accumulations of meteorites in blue ice fields on the polar plateau since 1969 and of cosmic dust in Antarctic ice, snow and supraglacial moraines ...
Folco L
core