Results 141 to 150 of about 9,609 (252)

Hybrid rocket performance [PDF]

A hybrid rocket is a system consisting of a solid fuel grain and a gaseous or liquid oxidizer. Figure 1 shows three popular hybrid propulsion cycles that are under current consideration.
Frederick, Robert A., Jr.
core   +1 more source

Varying Influence of Menstrual Cycle Phase and Hormonal Contraceptive Use on Resistance Exercise‐Induced Circulating Extracellular Vesicle and Metabolite Signalling

Journal of Extracellular Vesicles, Volume 15, Issue 3, March 2026.
ABSTRACT Resistance exercise augments circulating extracellular vesicle (EV) and metabolite signalling in manners that assist musculoskeletal and systemic adaptations. Women are often underrepresented in exercise research and recent attention has focused on whether hormonal fluctuations during the menstrual cycle and use of hormonal contraception (HC ...
Christopher K. Kargl, Bradley C. Nindl, Jenna B. Goulart, Evan D. Feigel, Amrita Sahu, Pouneh K. Fazeli, Alyssa L. Lee, Dhivyaa Rajasundaram, Fabrisia Ambrosio, Monica J. Hubal, Mita T. Lovalekar, Brian J. Martin, Adam J. Sterczala, Kristen J. Koltun   +13 more
wiley   +1 more source

The Future of Warheads, Armour and Ballistics / 23rd International Symposium on Ballistics

, 2007
23rd International Symposium on Ballistics, Tarragona, Spain, 16-20 April 2007 In 1983 a â Grand Old Manâ of Ballistic Science, Dr. Robert J. Eichelberger, wrote1: â Ballistic technology is generally considered a mature technology â as it should be after centuries of intensive attention of some of the finest scientific minds of the world.â He ...
Jazon, Bo, Backofen, Joseph Jr., Brown, Ronald E., Cayzac, Roxan, Giraud, Marc, Held, Manfred, Horst, Albert W., Thoma, Klaus, Diederen, André   +8 more
openaire   +1 more source

Initiation of the Ferrar Large Igneous Province Started in Southern North Victoria Land, Antarctica, With Shallow Emplacement of Sills Causing Magma‐Soft‐Rock Interaction and Phreatomagmatic Eruptions

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Early Jurassic volcanism was in the southern north Victoria Land portion of the Ferrar Large Igneous Province preceded by multiple phases of shallow‐level intrusions of Ferrar sills into the 300 m thick cover of sedimentary rocks of the Triassic‐Jurassic Victoria Group.
Lothar G. Viereck, Jörg Büchner, Robert Schöner, Jörg W. Schneider, Benjamin Bomfleur, Jan Tympel, Ricarda Hanemann, Axel Gerdes   +7 more
wiley   +1 more source

Assessing Potential Landing Sites With Favorable Illumination and Accessible, Potentially Volatile‐Rich Permanently Shadowed Regions Within Artemis Candidate Landing Regions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The lunar south pole features permanently shadowed regions (PSRs) that never receive direct sunlight. These regions maintain cold temperatures that potentially trap and accumulate volatiles over geologic timescales. Within NASA's Artemis candidate landing regions, we identified 130 candidate landing sites (CLSs) that satisfy the Human Landing ...
Lukas Wueller, Lauren M. Berger, Hephzibah Christopher, Kanori Sugimoto, Ashka D. Thaker, Louis Carton, William Jo, Seungil Lee, Riccardo Pedrelli, Pedro Sanchez, David A. Kring   +10 more
wiley   +1 more source

Advances in the development and characterization of combustible cartridge cases and propellants: Preparation, performance, and future prospects

Reviews on Advanced Materials Science
This study presents a comprehensive analysis of combustible cartridge cases (CCCs) and propellants with a focus on their preparation methods, characterization techniques, and application in modern weaponry.
Wu Mengde, Xiao Zhenggang
doaj   +1 more source

Correlated amplitudes of potentials evoked in homologous muscles by magnetic stimulation reveal positive covariation of corticospinal output

Experimental Physiology, Volume 111, Issue 3, Page 1299-1312, 1 March 2026.
Abstract figure There is positive covariation in the amplitudes of motor evoked potentials (MEPs) generated by (near simultaneous) stimulation of the two motor cortices. That is, larger responses to stimulation of the left motor cortex tend to be accompanied by larger responses to stimulation of the right motor cortex, and smaller responses to ...
Richard G. Carson
wiley   +1 more source

The internal ballistics of a spring gun

European Journal of Physics
Abstract We consider the features of pellet motion under the elastic force acting from a decompressing spring of a finite mass. The muzzle speed of the pellet decreases as the ratio between spring and pellet mass increases. In the general case, the pellet loses contact with the spring as it is stretched.
openaire   +1 more source

Solid-propellant rocket motor internal ballistic performance variation analysis, phase 2 [PDF]

The Monte Carlo method was used to investigate thrust imbalance and its first time derivative throughtout the burning time of pairs of solid rocket motors firing in parallel.
Foster, W. A., Jr., Sforzini, R. H.
core   +1 more source

Modeling of combustion processes of stick propellants via combined Eulerian-Lagrangian approach [PDF]

This research is motivated by the improved ballistic performance of large-caliber guns using stick propellant charges. A comprehensive theoretical model for predicting the flame spreading, combustion, and grain deformation phenomena of long, unslotted ...
Athavale, M. M., Hsieh, K. C., Kuo, K. K.   +2 more
core   +1 more source