Results 51 to 60 of about 327,633 (295)

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

How a close-in planet protects its white dwarf host from pollution

Astronomy & Astrophysics
Context. Approximately 25-50% of the white dwarfs (WDs) exhibit metal absorption lines in their photospheres. The lines are attributed to accretion from their remnant planetary systems. Although WDs with detected planetary systems are more likely to show
Zhang Xin-Yue, Xie Ji-Wei, Chen Di-Chang, Zhou Ji-Lin   +3 more
doaj   +1 more source

ExoPhot: The Photon Absorption Rate as a New Metric for Quantifying the Exoplanetary Photosynthetic Activity Fitness

Universe, 2022
Only a low percentage of the radiation from our Sun is captured by photosynthesis, but this conversion of solar to chemical energy sustains all life on Earth.
Pablo Marcos-Arenal, Luis Cerdán, Mercedes Burillo-Villalobos, Nuria Fonseca-Bonilla, Juan García de la Concepción, María Ángeles López-Cayuela, Felipe Gómez, José A. Caballero   +7 more
doaj   +1 more source

Stability Limits in Resonant Planetary Systems [PDF]

, 2007
The relationship between the boundaries for Hill and Lagrange stability in orbital element space is modified in the case of resonantly interacting planets.
Richard Greenberg, Rory Barnes, Santos N. C.   +2 more
core   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

TEPCat: The Transiting Extrasolar Planet Catalogue

Universe
Transiting extrasolar planets are extraordinarily valuable for understanding the characteristics and formation of planets, because they are the only exoplanets whose physical and orbital properties can be measured to high precision.
John Southworth
doaj   +1 more source

The Planetary Theory of Solar Activity Variability: A Review

Frontiers in Astronomy and Space Sciences, 2022
Commenting the 11-year sunspot cycle, Wolf (1859, MNRAS 19, 85–86) conjectured that “the variations of spot-frequency depend on the influences of Venus, Earth, Jupiter, and Saturn.” The high synchronization of our planetary system is already nicely ...
Nicola Scafetta, Antonio Bianchini
doaj   +1 more source

Five Kepler target stars that show multiple transiting exoplanet candidates [PDF]

, 2010
We present and discuss five candidate exoplanetary systems identified with the Kepler spacecraft. These five systems show transits from multiple exoplanet candidates.
Adams, Althea V. Moorhead, Batalha, Beatty, Borucki, Charbonneau, Claret, Daniel C. Fabrycky, Darin Ragozzine, David Koch, David W. Latham, Dimitar D. Sasselov, Douglas A. Caldwell, Eric B. Ford, Fabrycky, Ford, Fortney, François Fressin, Geoffrey Marcy, Gillon, Grasset, Guillermo Torres, Hartman, Howard Isaacson, Jack J. Lissauer, Jason F. Rowe, Jason H. Steffen, Jon M. Jenkins, Jonathan J. Fortney, Jurić, Koch, Koch, Lars A. Buchhave, Lee, Lee, Mandel, Marcus, Marcus, Matthew J. Holman, Meschiari, Michael Endl, Michael J. Haas, Natalie M. Batalha, Nesvorný, O'Donovan, Phillip J. MacQueen, Pilecki, Press, Prsa, Ragozzine, Robert C. Morehead, Rogers, Samuel N. Quinn, Sara Seager, Seager, Steffen, Steffen, Steve B. Howell, Torres, Valencia, William D. Cochran, William F. Welsh, William J. Borucki, Wright, Wu, Yee, Zakamska   +66 more
core   +2 more sources

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Dead Zones as Thermal Barriers to Rapid Planetary Migration in Protoplanetary Disks

, 2010
Planetary migration in standard models of gaseous protoplanetary disks is known to be very rapid ($\sim 10^5$ years) jeopardizing the existence of planetary systems.
Baruteau, Chiang, D'Alessio, D'Angelo, Dullemond, Jang-Condell, Johnson, Kretke, Laughlin, Masset, Matsumura, Menou, Oishi, Schlaufman, Scholz, Shakura, Tanaka, Udry, Ward   +18 more
core   +1 more source