Results 191 to 200 of about 863,762 (375)

Three‐dimensional morphological analysis of Chang'e‐5 lunar soil using deep learning‐automated segmentation on computed tomography scans

open access: yesComputer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Grain morphology is a fundamental characteristic of lunar soil that influences its mechanical properties, sintering behavior, and in situ resource utilization. However, traditional two‐dimensional imaging methods are time‐consuming and lack full three‐dimensional (3D) structural information. This study presents an automated deep learning‐based
Siqi Zhou   +6 more
wiley   +1 more source

Cryogenic gear technology for an orbital transfer vehicle engine and tester design [PDF]

open access: yes
Technology available for gears used in advanced Orbital Transfer Vehicle rocket engines and the design of a cryogenic adapted tester used for evaluating advanced gears are presented.
Calandra, M., Duncan, G.
core   +1 more source

Teacher leadership for integrated STEM education: Identifying what effective leaders need to know and do

open access: yesSchool Science and Mathematics, EarlyView.
Abstract Internationally, science, technology, engineering, mathematics (iSTEM) education continues to flourish in schools, with many now embracing the combined disciplinary assumption suggested by its acronym; integrated STEM (iSTEM) education. Advocated for its potential to increase student interest and achievement in STEM subjects, courses, and ...
Emma Stevenson, Pauline Thompson
wiley   +1 more source

Effect of Correlation on Multi-Engine Rocket Propulsion Systems [PDF]

open access: yes
A matter of great concern in the design and operation of multi-engine rocket propulsion systems is the effect of the premature shutdown of one engine on the vehicle.
Baker, J. R., Breneman, J. E.
core   +1 more source

Integrated STEM conceptualizations among teachers following a professional development program

open access: yesSchool Science and Mathematics, EarlyView.
Abstract Because teachers are now more often expected to develop integrated STEM lessons, it is essential to understand their conceptualizations to be able to support them effectively. This qualitative study explored teachers' integrated STEM conceptualizations upon participation in an engineering‐focused professional development program of 4 days ...
Canan Mesutoglu, Devrim Akgündüz
wiley   +1 more source

LIQUID PROPULSION AT IAE: VISION OF THE ACTIVITIES AND FUTURE PERSPECTIVES. doi: 10.5028/jatm.2009.010199106

open access: yesJournal of Aerospace Technology and Management, 2011
This paper presents the activities in the area of liquid propulsion, which received an effective boost at the end of the 90s.
Marco F. Carvalho Torres   +4 more
doaj  

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