Results 91 to 100 of about 20,111 (287)
Non-chemical space propulsion [PDF]
Space mission requirements and technical feasibility of non-chemical space propulsion ...
Evvard, J. C.
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Study of the Amplitude of Pressure and Thrust Oscillations in a Lab-Scale Hybrid Rocket [PDF]
, 2000 Hybrid rockets are being studied as a potential replacement for the solid rocket boosters on the NASA space shuttle. One physical characteristic of hybrid rockets that must be understood and overcome is potentially severe pressure oscillations during ...
Alford, Brian +4 more
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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
Journal of Aerospace Technology and ManagementThis work reports the development of an induction melting system for producing paraffin-based fuel units for hybrid rockets. The system is based in oscillating low-frequency magnetic field to generate heat within the material, enabling a precise ...
José Refugio Martínez +8 more
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“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
Investigation of Performance Stability of a Nytrox Hybrid Rocket Propulsion System
AerospaceNitrous oxide is a highly suitable oxidizer for hybrid rockets due to its self-pressurizing properties, moderate cost, and high accessibility. However, its vapor pressure and density are highly dependent on ambient temperature, requiring careful ...
Shih-Sin Wei +3 more
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Using Hybrid Agent-Based Systems to Model Spatially-Influenced Retail Markets [PDF]
One emerging area of agent-based modelling is retail markets; however, there are problems with modelling such systems. The vast size of such markets makes individual-level modelling, for example of customers, difficult and this is particularly true where
Alison Heppenstall +2 more
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Narrative reconstruction of the self: Living funerals as rituals of trauma and transformation
The Australian Journal of Anthropology, EarlyView.Abstract Living funerals mark a radical reconfiguration of contemporary engagements with mortality, transforming death from an imposed ending into an actively authored narrative. This study examines the practice in Hong Kong's hybrid sociocultural landscape, where traditional Chinese death rituals collide with neoliberal selfhood and globalised ...
Yuen‐Ki Tang
wiley +1 more source
Cost analysis of stratospheric albedo modification delivery systems
Environmental Research Letters, 2012 We perform engineering cost analyses of systems capable of delivering 1–5 million metric tonnes (Mt) of albedo modification material to altitudes of 18–30 km. The goal is to compare a range of delivery systems evaluated on a consistent cost basis.
Justin McClellan, David W Keith, Jay Apt
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Generation of optimal trajectories for Earth hybrid pole sitters [PDF]
, 2011 A pole-sitter orbit is a closed path that is constantly above one of the Earth's poles, by means of continuous low thrust. This work proposes to hybridize solar sail propulsion and solar electric propulsion (SEP) on the same spacecraft, to enable such a ...
Becerra V. M. +12 more
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