Results 71 to 80 of about 875 (223)
steel research international, EarlyView.The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley +1 more source
History, EarlyView.Abstract During the 1960s, Mexico's Institutional Revolutionary Party (PRI) embraced Chinese overtures for a commercial opening as consistent with its anti‐imperialist posture, thereby foreshadowing the diplomatic opening to China in 1972. Yet this professed ideological pluralism was eclipsed by an underlying allegiance to the United States' anti ...
YIXIN TIAN
wiley +1 more source
International Journal of Urban and Regional Research, EarlyView.Abstract In this article I dissect the spatial strategies through which the Spanish attempted to orchestrate both racial difference and similarity in the African colonies of Morocco, Western Sahara and Equatorial Guinea during the first half of the twentieth century.
Pol Fité Matamoros
wiley +1 more source
Global Policy, EarlyView.ABSTRACT This article explores the current controversies surrounding the European Ariane launcher and its implications for the future of European space governance. The Ariane program, historically a symbol of European technopolitical integration, faces mounting challenges due to delays, rising costs and increasing competition from private actors like ...
Nina Klimburg‐Witjes, Joseph Popper
wiley +1 more source
Experiments and Simulations of Hybrid Rocket Engines Burning Paraffin Fuels [PDF]
, 2021 In the last decade a significant and ever growing interest has been addressed towards hybrid rocket propulsion, which offers the best-of-both-worlds by leveraging the favourable aspect of both traditional solid and liquid systems.
Gallo, Giuseppe
core
Experimental Investigation on a Throttleable Pintle-Centrifugal Injector
Applied SciencesThis paper presents the design and experimental evaluation of a throttleable pintle-centrifugal injector system tailored for hybrid rocket engines, aimed at improving combustion efficiency and enabling precise throttling control.
Tianwen Li +3 more
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 +4 more
wiley +1 more source
Development of a Hybrid Rocket to Achieve Precise Altitudes [PDF]
, 2017 Hybrid rockets, employed by companies like space tourism provider Virgin Galactic, use propellants that are in different phases. Most commonly used is a solid fuel, such as Hydroxyl Terminated Polybutadiene (HTPB), paraffin, or acrylic, and a liquid ...
Krantz, Reece +12 more
core
Numeric geometry optimization in hybrid rocket engines [PDF]
, 2020 Sıvı yakıtlı roketlerin pahalılığı ve karmaşıklığı, katı yakıtlı roketlerin patlama tehlikesi ve itki kontrolü sorunları nedeniyle, güvenlik avantajı da dikkate alınarak son zamanlarda hibrit roketlere yönelindiği görülmektedir.
Koçak, Dilara
core
Авіаційно-космічна техніка та технологіяThe subjects of this article are processes in the chamber of the pulse detonation propulsion system of the combined acceleration cycle (PSCA). The goal is to identify the most significant factors and study their influence on the defining characteristics ...
Olena Zolotko +4 more
doaj +1 more source