3,131 research outputs found
Terahertz Waveguiding in Silicon-Core Fibers
We propose the use of a silicon-core optical fiber for terahertz (THz)
waveguide applications. Finite-difference time-domain simulations have been
performed based on a cylindrical waveguide with a silicon core and silica
cladding. High-resistivity silicon has a flat dispersion over a 0.1 - 3 THz
range, making it viable for propagation of tunable narrowband CW THz and
possibly broadband picosecond pules of THz radiation. Simulations show the
propagation dynamics and the integrated intensity, from which transverse mode
profiles and absorption lengths are extraced. It is found that for 140 - 250
micron core diameters the mode is primarily confined to the core, such that the
overall absorbance is only slightly less than in bulk polycrystalline silicon.Comment: 6 pages, 3 figures, journal submissio
Soapmaking 101 - Exploiting COVID-19 to teach practical science and analytical skills remotely
Peer reviewedPublisher PD
Developing online resources on statistics and data handling for medical science students
Peer reviewe
Pupil-led biomedical lessons for primary school children : a pilot study
Peer reviewedPublisher PD
Using Game of Thrones to teach neuroscience and neuropharmacology during lockdown
Peer reviewedPublisher PD
Shuttle Return To Flight Experimental Results: Protuberance Effects on Boundary Layer Transition
The effect of isolated roughness elements on the windward boundary layer of the Shuttle Orbiter has been experimentally examined in the Langley Aerothermodynamic Laboratory in support of an agency-wide effort to prepare the Shuttle Orbiter for return to flight. This experimental effort was initiated to provide a roughness effects database for developing transition criteria to support on-orbit decisions to repair damage to the thermal protection system. Boundary layer transition results were obtained using trips of varying heights and locations along the centerline and attachment lines of 0.0075-scale models. Global heat transfer images using phosphor thermography of the Orbiter windward surface and the corresponding heating distributions were used to infer the state of the boundary layer (laminar, transitional, or turbulent). The database contained within this report will be used to formulate protuberance-induced transition correlations using predicted boundary layer edge parameters
Physiology students can use a quality improvement approach to support a safe and efficient medication pathway in geriatric rehabilitation
Peer reviewedPublisher PD
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