Results 71 to 80 of about 1,081 (242)
Development of a Martian in-situ hybrid rocket motor
, 2020 One of the chief obstacles that has prevented a human mission to Mars is the excessive amount of mass that must be launched into low earth orbit to assemble the Mars-bound spacecraft. Since propellants alone account for 75% of the total mass requirements, a new concept has been proposed for both manned missions and unmanned robotic sample return ...
Babazadeh, Iman Andrew, author +3 more
openaire +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
Developing Workforce Capability in the Context of HR Ecosystem Learning
Human Resource Management Journal, EarlyView.ABSTRACT For many organizations, developing workforce capabilities is central as it involves refining critical human resource processes such as upskilling or the acquisition of new profiles. These processes are becoming increasingly complex to manage as organizations collaborate within larger work ecosystems. Surprisingly, little research has addressed
Sophie D'Armagnac +3 more
wiley +1 more source
Closed-loop throttle control of a hybrid rocket motor. [PDF]
, 2018 Masters Degree. University of KwaZulu-Natal, Durban.Hybrid rocket motors produce thrust by reacting a solid fuel with a liquid oxidizer inside a combustion chamber. This approach has certain advantages over conventional solid propellant rockets including
Velthuysen, Timothy Johnathan.
core
A Study on the Combustion Instability of the Hybrid Rocket Motor with a Diaphragm [PDF]
Journal of the Korean Society of Propulsion Engineers, 2013 In this paper, the main cause on excitation of the combustion instability which may occur in the hybrid rocket motor with a diaphragm was studied. Hybrid rocket motor propulsion tests considering various experimental conditions such as with a diaphragm or not, a diameter of diaphragm, oxidizer mass flow rate, fuel length, etc were performed, and the ...
Jungpyo Lee +3 more
openaire +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
Journal of Aerospace Technology and Management, 2013 http://dx.doi.org/10.5028/jatm.v5i3.228 Experimental investigation was conducted to determine the relative propulsive and combustion behavior of several polyurethane-based solid-fuel formulations containing 30% w/w of paraffin or 10% of aluminum powder.
Susane Ribeiro Gomes +3 more
doaj
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
Low-Erosion Nozzle Materials for Long-Duration Hybrid Rocket Burns
, 2023 Hybrid rocket systems, which employ a solid fuel grain and a liquid oxidizer, are a low-cost and environmentally friendly alternative to traditional rocket systems.
Babb, Russell S.
core +1 more source
Towards an integrated molecular understanding of plant hormones
Journal of Integrative Plant Biology, EarlyView.This review offers a comprehensive overview of the nine plant hormones, delving into their biosynthesis, transport, signaling and crosstalk mechanisms. Because the complexity of plant hormonal control goes beyond these core elements, additional specific features are discussed. Lastly, this review highlights how fundamental insights drive hormonal‐based
Louise Vilain +2 more
wiley +1 more source