Results 61 to 70 of about 995,709 (250)

Impact of planet--planet scattering on the formation and survival of debris disks

, 2014
Planet--planet scattering is a major dynamical mechanism able to significantly alter the architecture of a planetary system. In addition to that, it may also affect the formation and retention of a debris disk by the system.
Marzari, F.
core   +1 more source

β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations

Advanced Biology, Volume 9, Issue 3, March 2025.
Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio, B. Spedicato, G. Corallo, A. Inguscio, M. Greco, D. Musarò, D. Vergara, A. F. Muro, G. De Sabbata, L. R. Soria, N. Brunetti Pierri, M. Maffia   +11 more
wiley   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Improved orbit predictions using two-line elements

, 2010
The density of orbital space debris constitutes an increasing environmental challenge. There are three ways to alleviate the problem: debris mitigation, debris removal and collision avoidance.
Alfriend, Boers, Boyce, Coffey, Creon Levit, Danielson, Flohrer, Gilbreath, Hedin, Kessler, Legendre, Liou, Liou, Neal, Pearlman, Ries, Schumacher, Snow, Wang, William Marshall   +19 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Transient dust in warm debris disks - Detection of Fe-rich olivine grains

, 2012
(Abridged) Debris disks trace remnant reservoirs of leftover planetesimals in planetary systems. A handful of "warm" debris disks have been discovered in the last years, where emission in excess starts in the mid-infrared.
A. Juhász, A. Moór, A. Tamanai, Aumann, Begemann, Beichman, Beichman, Bouwman, Bouwman, Bradley, Brunetto, Bryden, Burns, Carpenter, Charbonneau, Chen, Chen, Chen, Davison, Dohnanyi, Dorschner, Egan, Fabian, Fujiwara, Furlan, Gail, Gorlova, H. Mutschke, Henning, Henning, Henning, J. Olofsson, Juhasz, Juhász, Jäger, Jäger, Jäger, Keil, Kemper, Kitamura, Koerner, Koike, Koike, Krivov, Lebreton, Liseau, Lisse, Lisse, Lisse, Lisse, Lovis, Low, Löhne, Matranga, Melis, Min, Min, Moskovitz, Moór, Murata, Mutschke, Nakamura, Naylor, Nguyen, Nuth, Oliveira, Olofsson, Olofsson, Ossenkopf, P. Ábrahám, Prato, Qin, Sargent, Sargent, Scherstén, Smith, Smith, Soderblom, Sogawa, Sprague, Tamanai, Tamanai, Th. Henning, Thompson, Verrier, Voshchinnikov, Weinberger, Weinberger, Wogelius, Wolf, Wooden, Wooden, Wooden, Wyatt, Wyatt, Zeidler, Zolensky, Zolensky, Zuckerman, Ábrahám   +99 more
core   +1 more source

Elinvar Materials: Recent Progress and Challenges

Advanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

A Spitzer Study of Debris Disks in the Young Nearby Cluster NGC 2232: Icy Planets Are Common around ~1.5-3 M☉ Stars [PDF]

, 2008
We describe Spitzer IRAC and MIPS observations of the nearby 25 Myr old open cluster NGC 2232. Combining these data with ROSAT All-Sky Survey observations, proper motions, and optical photometry/spectroscopy, we construct a list of highly probable ...
Currie, Thayne, Kenyon, Scott J., Plavchan, Peter   +2 more
core  

Packaging of Macroscopic Material Payloads: Needs, Challenges, Concepts, and Future Directions

Advanced Engineering Materials, EarlyView.
This review introduces a unified framework that decomposes any macroscopic packaging system into the payload, packaging material, and packaging strategy and combines them into a conceptual packaging equation: packaging strategy = payload + packaging material.
Venkata S. R. Jampani, Manos Anyfantakis
wiley   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source