Results 81 to 90 of about 1,081 (242)
Hybrid Rocket Propulsion for Sounding Rocket Applications
, 1991 A discussion of the H-225K hybrid rocket motor, produced by the American Rocket Company, is given. The H-225K motor is presented in terms of the following topics: (1) hybrid rocket fundamentals; (2) hybrid characteristics; and (3) hybrid ...
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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
, 2011 This paper presents the design of a hybrid rocket motor and the experiments carried out for investigation of hybrid combustion and regression rates for a combination of liquid oxidiser red fuming nitric acid with solid fuel hydroxyl-terminated ...
Ramanujachari, V. +2 more
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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 +7 more
wiley +1 more source
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
CFD Simulations of Self-Pressurized Nitrous Oxide Hybrid Rocket Motors [PDF]
, 2017 Delft Aerospace Rocket Engineering has developed a 1 kN hybrid rocket motor, using Nitrous Oxide\nas oxidizer and a mixture of Sorbitol and Paraffin as fuel. The thesis starts with the numerical simulation of the rocket motor firing.
Gelain, Riccardo
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The Biofuels Blueprint: Understanding the U.S. Renewable Fuel Standard
Applied Economic Perspectives and Policy, Volume 48, Issue 3, Page 565-590, July 2026.ABSTRACT We provide a comprehensive review of the U.S. Renewable Fuel Standard (RFS), synthesizing nearly two decades of program evolution, market outcomes, and economic analysis. The RFS mandates minimum volumes of renewable fuel blending through a nested structure based on life‐cycle greenhouse gas reductions, enforced via tradeable Renewable ...
Maria Gerveni +3 more
wiley +1 more source
Mass Spectrometry Structural Proteomics Enabled by Limited Proteolysis and Cross‐Linking
Mass Spectrometry Reviews, Volume 45, Issue 4, Page 644-671, July/August 2026.ABSTRACT The exploration of protein structure and function stands at the forefront of life science and represents an ever‐expanding focus in the development of proteomics. As mass spectrometry (MS) offers readout of protein conformational changes at both the protein and peptide levels, MS‐based structural proteomics is making significant strides in the
Haiyan Lu +4 more
wiley +1 more source
DEVELOPMENT OF A ROCKET MOTOR TEST SYSTEM AND A STUDY OF HYBRID ROCKET FUEL GRAINS
, 2009 A rocket test system was developed and fabricated for the purpose of testing hybrid rocket motors. The test system includes a rocket test stand, load cell, and data acquisition system that is capable of safely and accurately recording thrust data from ...
Patterson, William Ray
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Hybrid rocket performance with varying additive concentrations
, 2013 A hybrid rocket motor represents a compromise between a solid rocket motor and a liquid rocket motor in terms of its performance. In addition, hybrid rockets are featured by throttling capability, increased safety, moderate cost and benign environmental ...
Kafafy, Raed +2 more
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