Results 71 to 80 of about 440 (201)

Development and Testing of a Fast-Acting, 8-Bit, Digital Throttle for Hybrid Rocket Motors

Fire
The potential for throttle control of hybrid rocket systems has long been known as a potential advantage for a variety of applications. Because only a single flow path is controlled, theoretically, hybrids should be significantly easier to throttle than ...
Stephen A. Whitmore
doaj   +1 more source

InterPLAY: A Framework to Describe Play and STEM Engagement at Exhibits for Young Children

Curator: The Museum Journal, EarlyView.
ABSTRACT Play‐based STEM learning at exhibits is a feature of children's museums and science centers; yet little is known about how these exhibits support young children's STEM engagement. This study developed and tested the interPLAY Framework to describe play‐based STEM engagement at exhibits for young children.
Kelly L. Hoke, Martin Storksdieck, Kelly Riedinger, Jessica J. Luke, Jennifer Rehkamp   +4 more
wiley   +1 more source

“Nowhere else to go”: Slow abandonment and (en)closures of long‐term care in Los Angeles

Medical Anthropology Quarterly, EarlyView.
Abstract Residential long‐term care facilities, known in California as “board and care” homes, have been closing rapidly in the last decade. Proponents assert these provide vital forms of housing and care to the poor and must be saved, while critics contend they perpetuate the institutionalization of people with disabilities and should be abolished ...
Maxwell A. Hellmann
wiley   +1 more source

Design, Manufacture and Experimental Study of a Hydrogen Peroxide-HTPB Hybrid Rocket Motor [PDF]

فصلنامه علوم و فناوری فضایی, 2013
The application of the hydrogen peroxide as the oxidizer of a HTPB-based prototype hybrid motor is investigated in this paper. First of all, by studying the thermochemical characteristics of the propellant,operation range of different compositions is ...
Hojat Ghassemi, Mohammad Nadafi – Pour Meibody, Keyvan Shaabani, Isa Asghari, Ebrahim Zanjirian   +4 more
doaj  

Welcome Home: A Shared Identity Recognition in the Time of Crisis

Nations and Nationalism, EarlyView.
ABSTRACT How does a society sustain collective identity when formal citizenship and cultural recognition persistently diverge? Drawing on qualitative interviews with native‐born sabras and Russian‐speaking immigrants in Israel, this article develops a recognition‐gap framework specifying the mechanisms through which national belonging is produced ...
Mania Borzenko
wiley   +1 more source

C/C-SiC Composites for Nozzle of Solid Propellant Ramjet

Journal of Aeronautical Materials, 2017
Carbon fiber reinforced carbon and silicon carbide matrix composites for nozzle inner of solid propellant ramjet were prepared by using the hybrid process of "chemical vapor infiltration + precursor impregnation pyrolysis (CVI+PIP)".
WANG Lingling, JI Alin, GAO Yaqi, CUI Hong, YAN Liansheng, PANG Fei   +5 more
doaj   +1 more source

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

Journal of Field Robotics, Volume 43, Issue 6, Page 4094-4115, September 2026.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton, Daniel Mitchell, Jamie Blanche, Euan McGookin, David Flynn   +4 more
wiley   +1 more source

Leveraging Multimodal Large Language Models to Analyse Student Exploration Behaviours in Educational Game Environments

Journal of Computer Assisted Learning, Volume 42, Issue 4, August 2026.
ABSTRACT Background Video data provides rich opportunities to examine student behaviour in game‐based learning environments, capturing not only observable actions but also subtle indicators of cognitive engagement. However, traditional video analysis is labor‐intensive, and current applications of AI to this task are limited by models trained on ...
Yiqiu Zhou, Xiner Liu, Andres Felipe Zambrano, Luc Paquette, Amanda Barany, Jaclyn Ocumpaugh, Ryan S. Baker, Jeff Ginger   +7 more
wiley   +1 more source

Structural Integrity Assessment of a Long-Range Artillery Projectile Body via Analytical and Numerical Approaches [PDF]

Journal of Applied and Computational Mechanics
Long-range artillery projectiles can feature a hybrid design that integrates a base bleed unit and a solid rocket motor, offering substantial improvements in ballistic performance. These improvements are accompanied by significant increases in the launch
Abdellah Ferfouri, Damir Jerkovic, Sasa Zivkovic, Toufik Allouche, Nebojsa Hristov   +4 more
doaj   +1 more source

The Interplay of Teacher Agency and TPACK in AI‐Integrated Science Education: Insights From Exemplary Practice Cases

Journal of Computer Assisted Learning, Volume 42, Issue 4, August 2026.
ABSTRACT Background Teacher agency plays a pivotal role in technology‐enhanced instruction, yet empirical evidence connecting agency to the practical enactment of specific components of TPACK remains limited. In particular, the intersections between teacher agency and TPK/TCK as enacted practices warrant closer scrutiny.
Hyojoon Kim, Eun‐Jeong Yu
wiley   +1 more source