Results 31 to 40 of about 104,383 (339)

Predicting phase transition pressure in solids: a semiclassical possibility

, 1999
This is a short review of the physical ideas,algorithm for calculations and some results of a semiclassical theory of the behaviour of materials under high pressure,proposed by P.Savic and R.Kasanin.The theory has found applications from DAC experiments ...
[Cbreve]elebonović V., Celebonović V., Leung Y. C., Ma D., Negele J. W., Pollaine S. M., Savić P., Savić P., Vasiliev B. V., Vladan Celebonovic, ăSavic P.   +10 more
core   +2 more sources

Solar-like oscillations in a massive star [PDF]

, 2009
Seismology of stars provides insight into the physical mechanisms taking place in their interior, with modes of oscillation probing different layers. Low-amplitude acoustic oscillations excited by turbulent convection were detected four decades ago in ...
Appourchaux, T., Auvergne, M., Baglin, A., Baudin, F., Belkacem, K., Catala, C., Deheuvels, S., Dupret, M. -A., Goupil, M. -J., Lefevre, L., Michel, E., Miglio, A., Montalban, J., Noels, A., Samadi, R., Scuflaire, R., Talon, S., Thoul, A.   +17 more
core   +3 more sources

Probing the Rock Mass Fraction and Transport Efficiency inside Uranus Using 40Ar Measurements

The Planetary Science Journal
The bulk of Uranus consists of a rock–ice core, but the relative proportions of rock and ice are unknown. Radioactive decay of potassium in the silicates produces ^40 Ar.
Francis Nimmo, Jonathan Lunine, Kevin Zahnle, Lars Stixrude   +3 more
doaj   +1 more source

An Ancient Martian Dynamo Driven by Hemispheric Heating: Effect of Thermal Boundary Conditions

The Planetary Science Journal, 2023
Magnetic field observations from the MGS, MAVEN, and InSight missions reveal that a dynamo was active in Mars’s early history. One unique feature of Mars’s magnetic crustal field is its hemispheric dichotomy, where magnetic fields in the southern ...
Chi Yan, Ankit Barik, Sabine Stanley, Jason S.-Y. Leung, Anna Mittelholz, Catherine L. Johnson, Ana-Catalina Plesa, Attilio Rivoldini   +7 more
doaj   +1 more source

Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates [PDF]

, 2014
We report on the orbital architectures of Kepler systems having multiple planet candidates identified in the analysis of data from the first six quarters of Kepler data and reported by Batalha et al. (2013).
Agol, Eric, Barclay, Thomas, Batalha, Natalie, Borucki, William, Ciardi, David R., Fabrycky, Daniel C., Ford, Eric B., Gautier, Thomas N., Geary, John C., Holman, Matthew J., Jenkins, Jon M., Li, Jie, Lissauer, Jack J., Morehead, Robert C., Morris, Robert L., Ragozzine, Darin, Rowe, Jason F., Shporer, Avi, Smith, Jeffrey C., Steffen, Jason H., Still, Martin, van Cleve, Jeffrey   +21 more
core   +4 more sources

The role and implications of mammalian cellular circadian entrainment

FEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source

A Comparison of the Interiors of Jupiter and Saturn

, 1999
Interior models of Jupiter and Saturn are calculated and compared in the framework of the three-layer assumption, which rely on the perception that both planets consist of three globally homogeneous regions: a dense core, a metallic hydrogen envelope ...
Anders, Bahcall, Bockelée-Morvan, Bosh, Boss, Brami, Burrows, Busse, Cameron, Campbell, Campbell, Carlson, Chabrier, Clayton, Collins, Conrath, Conrath, Da Silva, de Pater, Fegley, Folkner, Gautier, Gautier, Geiss, Gierasch, Griffin, Gudkova, Guillot, Guillot, Guillot, Guillot, Guillot, Hanel, Hanel, Holmes, Hubbard, Hubbard, Hubbard, Hubbard, Hubbard, Hubbard, Kippenhahn, Klepeis, Landau, Lindal, Lindal, Lindal, Lissauer, Mahaffy, Marcy, Marley, Mayor, Nellis, Nellis, Niemann, Pfaffenzeller, Pollack, Roos-Serote, Roulston, Salpeter, Saumon, Seiff, Showman, Stevenson, Stevenson, Stevenson, Tristan Guillot, von Zahn, Weir, Zhang, Zharkov, Zharkov, Zharkov   +72 more
core   +1 more source

Planetary Interiors

Eos, Transactions American Geophysical Union, 1985
The effective definition of a planet is a body too small to sustain nuclear reactions in its interior, but large enough that its thermal decay time is more than five billion years, the age of the solar system. By this definition, there are fifteen planets in the solar system: all the conventional planets but Pluto plus the seven large satellites.
openaire   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Libration- and Precession-driven Dissipation in the Fluid Cores of the TRAPPIST-1 Planets

The Planetary Science Journal, 2023
The seven planets orbiting TRAPPIST-1 have sizes and masses similar to Earth and mean densities that suggest that their interior structures are comprised of a fluid iron core and rocky mantle.
Dhananjhay Bansal, Hannah S. Christie, Mathieu Dumberry   +2 more
doaj   +1 more source