Results 101 to 110 of about 40,392 (313)

HYBRID ROCKET ENGINE TEST FACILITY DESIGN

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2016
Hybrid rocket engines is relatively less researched subject of chemical rockets. Using fuel and oxidizer in different phases hybrids are safe and cheap. Yet, they are not generating enogh thrust to deliver heavy payloads to edge of space.
Ali Emre Samur   +2 more
doaj  

Hybrid propulsion technology program: Phase 1. Volume 3: Thiokol Corporation Space Operations [PDF]

open access: yes
Three candidate hybrid propulsion (HP) concepts were identified, optimized, evaluated, and refined through an iterative process that continually forced improvement to the systems with respect to safety, reliability, cost, and performance criteria. A full
Schuler, A. L., Wiley, D. R.
core   +1 more source

Effects of Cosmic String Velocities and the Origin of Globular Clusters

open access: yes, 2015
With the hypothesis that cosmic string loops act as seeds for globular clusters in mind, we study the role that velocities of these strings will play in determining the mass distribution of globular clusters.
Brandenberger, Robert   +2 more
core   +1 more source

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell   +2 more
wiley   +1 more source

Resupply/repair of solid or hybrid attitude propulsion subsystems. Volume 1 - Program summary Final report, 1 Jul. - 31 Dec. 1970 [PDF]

open access: yes
Optimum methods for orbital resupply, maintenance, and repair of hybrid propellant rocket engine subsystem for orbiting space station attitude ...
Murphy, J. M.
core   +1 more source

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

open access: yesMedical 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

A Relational Perspective on Land in Armed Conflict: Analysing the Village Guard Mobilisation in Turkey

open access: yesStudies in Ethnicity and Nationalism, EarlyView.
ABSTRACT This article examines the Turkish state's Village Guard system, revived in the 1980s as part of its counterinsurgency strategy against the Kurdistan Workers Party (PKK). While often framed as a defensive militia, the Village Guards became central to the state's exceptional governance in Kurdistan, both facilitating military control and ...
Francis O'Connor   +3 more
wiley   +1 more source

Solution ALD of (CH3NH3)(PbI3) Perovskite Thin Films Yields Functional Quality and Stability Superior to Classical Processing

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 3, 16 January 2026.
Chemically controlled deposition of the prototypical hybrid halide perovskite methylammonium triiodoplumbate(II), MAPI, is demonstrated in layer by layer fashion from the solution phase. Theoretical modeling confirms the accretion mechanism. Extensive materials and functional characterization highlight how chemical control of nucleation and growth ...
Vanessa M. Koch   +29 more
wiley   +1 more source

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