Results 61 to 70 of about 61,069 (314)
British Journal of Clinical Pharmacology, EarlyView.Aim Our international cohort study assessed the comparative effectiveness and safety of direct oral anticoagulants (DOACs) and vitamin K antagonists (VKAs) among patients with non‐valvular atrial fibrillation (NVAF) using antiarrhythmic drugs. Methods Using the United Kingdom's (UK's) Clinical Practice Research Datalink Aurum and Québec claims data, we
Fabian Maximilian Meinert +5 more
wiley +1 more source
Rocket nozzle thermal shock tests in an arc heater facility [PDF]
A rocket motor nozzle thermal structural test technique that utilizes arc heated nitrogen to simulate a motor burn was developed. The technique was used to test four heavily instrumented full-scale Star 48 rocket motor 2D carbon/carbon segments at ...
Painter, James H., Williamson, Ronald A.
core +1 more source
Young people's occupational aspirations beyond the aspiration discourse: A sociocultural perspective
British Educational Research Journal, EarlyView.Abstract Young people's aspirations have been the focus of many educational, sociological and psychological studies. This paper argues, firstly, that the concept of aspirations holds greater generative potential than suggested by the policy‐oriented ‘aspiration discourse’.
Jelena Popov
wiley +1 more source
A numerical method for solid propellant grain design [PDF]
Scientific Technical Review, 2018 In this study, a grain burnback analysis for an Anchor solid propellant grain geometry for a rocket motor was done. The design process involves parametric modeling of the geometry in using PTC Creo software through dynamic variables that define the ...
Tanaskovski Bojan +3 more
doaj
Optimization of Construction of the rocket-assisted projectile
MATEC Web of Conferences, 2017 New scheme of the rocket motor of rocket-assisted projectile providing the increase in distance of flight due to controlled and optimal delay time of ignition of the solid-propellant charge of the SRM and increase in reliability of initiation of the SRM ...
Arkhipov Vladimir, Perfilieva Ksenia
doaj +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT This study examines the economic consequences of Digital Technologies Disclosure (DTD), focusing on its impact on the cost of capital. The increasing significance of digital transformation in shaping corporate strategies and market perceptions motivates the study.
Hussein Mohsen Saber Ahmed +2 more
wiley +1 more source
MachinesDuring the ignition process of a solid rocket motor, the pressure changes dramatically and the ignition process is very complex as it includes multiple reactions.
Huixin Yang +4 more
doaj +1 more source
A Model for Igniter Mass Flow Rate History Evaluation for Solid Rocket Motors
International Journal of Aerospace Engineering, 2019 This paper describes a zero-dimensional model for evaluating the mass flow rate history of a solid rocket motor igniter. Based on the results of an igniter-firing experiment, in which the igniter is the only source of combustion gas and no propellant is ...
Yanjie Ma +4 more
doaj +1 more source
Carbon Energy, EarlyView.An expandable‐thickness graphene block (GPB) with high thermal conductivity synthesized through multiscale blending and multistage pressure induction (MBP) achieves a record thickness of 12.1 mm, which is more than 10 times that of existing graphene materials. The maximum thermal diffusion ability of GPB‐MBP reaches 6.3 W/K, which offers a new approach
Liyu Zhang +9 more
wiley +1 more source
On the nature of the fragment environment created by the range destruction or random failure of solid rocket motor casings [PDF]
Given here are predictions of fragment velocities and azimuths resulting from the Space Transportation System Solid Rocket Motor range destruct, or random failure occurring at any time during the 120 seconds of Solid Rocket Motor burn.
Eck, M., Mukunda, M.
core +1 more source