Results 91 to 100 of about 38,437 (282)
Resilient education: The role of digital technology in supporting geographical education in Ukraine
Transactions of the Institute of British Geographers, EarlyView.Abstract This commentary spotlights the continued impact of the Russian invasion on geography education in higher education in Ukraine. From discussions with Ukrainian geographers in institutions in contrasting regions of the country, we describe their resilience in adapting the delivery of the physical geography curriculum, especially in the essential
Simon M. Hutchinson +5 more
wiley +1 more source
Experimental investigation of erosion rate of insulation materials using hybrid rockets
FirePhysChem, 2021 Thermal insulation is essential to protect the exposed surface from high-temperature and high heat flux situations. The selection of suitable insulation materials plays a crucial role in determining rocket performance.
Phaninder Reddy Vaka +2 more
doaj
Preliminary analysis of space mission applications for electromagnetic launchers [PDF]
The technical and economic feasibility of using electromagnetically launched EML payloads propelled from the Earth's surface to LEO, GEO, lunar orbit, or to interplanetary space was assessed.
Conlon, R. J. +3 more
core +1 more source
Assigning airport ground handling operations: a data‐driven matheuristic
International Transactions in Operational Research, Volume 33, Issue 1, Page 359-383, January 2026.Abstract In this paper, we study a problem in the crossover between vehicle routing and scheduling problems. The multi‐trip capacitated vehicle routing and scheduling problem with time windows and meal breaks is extended to a heterogeneous fleet of trucks and drivers, with qualifications and different loading patterns.
Alexandre Dupaquis +5 more
wiley +1 more source
Hybrid Propulsion Technology Program [PDF]
Future launch systems of the United States will require improvements in booster safety, reliability, and cost. In order to increase payload capabilities, performance improvements are also desirable.
Holzman, A. L., Jensen, G. E.
core +1 more source
Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.Abstract High‐frequency (HF) ordinary polarized (O)‐mode waves transmitted along the Earth's geomagnetic field can excite plasma modes on both the bottomside and topside of the ionosphere, a process attributed to O‐to‐Z mode conversion. This mechanism explains how electromagnetic wave energy penetrates beyond the resonance.
Danish Naeem, Dong‐Hun Lee, Kihong Kim
wiley +1 more source
HYBRID ROCKET ENGINE TEST FACILITY DESIGN
Havacılık 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
Experimental Flow Investigation of a Truncated Ideal Contour Nozzle [PDF]
, 2006 Various tests showed a significant side load peak for low nozzle pressure ratios during engine start-up and shut down phase. DLR Lampoldshausen carried out tests to examine the flow field in a truncated ideal contour nozzle for low NPR.
Stark, Ralf, Wagner, Bernd
core +1 more source
COHERENT STREAM INJECTION AND ITS APPLICATION TO STANDING DETONATION WAVE AND HYBRID ROCKET ENGINES [PDF]
, 1963 Leroy J. Krzycki
openalex +1 more source
Multiphysics Modelling of a Hybrid Rocket Engine [PDF]
14th WCCM-ECCOMAS Congress, 2021 Ferrero, A. +3 more
openaire +3 more sources