Results 51 to 60 of about 304,444 (325)

White Christian Nationalism: Adult Education and Threats to Democracy

New Directions for Adult and Continuing Education, EarlyView.
ABSTRACT Adult education has a historical and ongoing commitment to fostering democratic relationships, demonstrated by the tendency of adult education to be called upon when social change and realignment are most desirable. This article considers the philosophical and pragmatic possibilities for adult education at this moment, when White Christian ...
Ralf St. Clair, Lyn Tett, Rob Black
wiley   +1 more source

Analysis of radial velocity variations in multiple planetary systems

, 2010
The study of multiple extrasolar planetary systems has the opportunity to obtain constraints for the planetary masses and orbital inclinations via the detection of mutual perturbations.
András Pál, Bakos, Baluev, Bean, Benedict, Cochran, Eggl, Ferraz-Mello, Finn, Ford, Ford, Goldreich, Goździewski, Gröbner, Hanslmeier, Laskar, Laughlin, Marois, McArthur, Meschiari, Press, Pál, Pál, Pál, Tinney, Vogt, Wright, Wright   +27 more
core   +1 more source

Stellar proper motion and the timing of planetary transits [PDF]

, 2008
Duration and period of transits in extrasolar planetary systems can exhibit long-term variations for a variety of reasons. Here we investigate how systemic proper motion, which steadily re-orients planetary orbit with respect to our line of sight ...
Arzoumanian, Cochran, Ford, Johnson, Jordán, Knutson, Kopeikin, Kopeikin, Manchester, Miralda-Escudé, Narita, Ribas, Roman R. Rafikov, Scharf, Shklovskii, Tingley, Winn, Wu   +17 more
core   +1 more source

Development of a Novel Processing Route for Dispersoid/Precipitation‐Strengthened High Conductive Copper Alloys by Using Metalized Nanoceramics in Additive Manufacturing

Advanced Engineering Materials, EarlyView.
This study explores a process chain to produce dispersoid‐strengthened CuCr1Zr for applications requiring high strength and conductivity. Using gas‐atomized powder and copper‐plated alumina nanoparticles, additive manufacturing is performed via powder bed based additive manufacturing with green and red lasers, followed by heat treatment.
Heinrich von Lintel, Abdelrahman Elsayed, Lukas Mielewczyk, Katja Eichmann, Julia Grothe, Ulrich Krupp, Avinash Hariharan, Katrin Jahns   +7 more
wiley   +1 more source

Analytic orbit propagation for transiting circumbinary planets

, 2015
The herein presented analytical framework fully describes the motion of coplanar systems consisting of a stellar binary and a planet orbiting both stars on orbital as well as secular timescales.
Eggl, Siegfried, Georgakarakos, Nikolaos
core   +2 more sources

A Novel Approach on Rapid Alloy Development of Tool Steels for Laser Powder Bed Fusion by In Situ Alloying

Advanced Engineering Materials, EarlyView.
A novel approach for alloy development in laser powder bed fusion is introduced. Instead of producing massive samples of one composition at a time, prepressed powder bed samples produced from powder mixtures are processed. Guidelines for the selection of precursor powders are developed.
Felix Großwendt, Anna Strauch, Jonathan Lentz, Arne Röttger, Rainer Fechte‐Heinen, Sebastian Weber, Werner Theisen   +6 more
wiley   +1 more source

Unstable Planetary Systems Emerging Out Of Gas Disks

, 2010
The discovery of over 400 extrasolar planets allows us to statistically test our understanding of formation and dynamics of planetary systems via numerical simulations.
Adams, Bryden, Chatterjee, Chiang, Currie, Duncan, D’Angelo, D’Angelo, Edward W. Thommes, Ford, Frederic A. Rasio, Goldreich, Hillenbrand, Jurić, Kokubo, Lee, Lodders, Masset, Matsuyama, Menou, Murray, Nagasawa, Narita, Raymond, Shakura, Sicilia-Aguilar, Soko Matsumura, Sourav Chatterjee, Tanigawa, Thommes, Winn, Wittenmyer, Wright, Wright   +33 more
core   +1 more source

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Evolution of planetary systems in resonance [PDF]

Astronomy & Astrophysics, 2004
We study the time evolution of two protoplanets still embedded in a protoplanetary disk. The results of two different numerical approaches are presented and compared. In the first approach, the motion of the disk material is computed with viscous hydrodynamical simulations, and the planetary motion is determined by N-body calculations including exactly
Geoffrey Bryden, Jochen Peitz, Wilhelm Kley   +2 more
openaire   +3 more sources

In Situ Formation of a Melt‐Solid Interface Toward Stable Oxygen Reduction in Protonic Ceramic Fuel Cells

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
Protonic ceramic fuel cells offer a promising route to generate power efficiently but face critical challenges in achieving industrially viable activity and stability at their cathodes in CO2‐containing air. This report proposes a new cathode material design strategy to enable the cathode to be both catalytically active and CO2 tolerant through the ...
Desheng Feng, Mengran Li, Vanessa K. Peterson, Rijia Lin, Anita D'Angelo, Olexandra Marenych, Anya Yago, Dominique Appadoo, Tianjiu Zhu, Muhammad Yazid Bin Zulkifli, Shuai Gao, Yuming Wu, Xiaohe Tian, Xiaoyang Du, Zhonghua Zhu   +14 more
wiley   +1 more source