J
John O'Byrne
Researcher at University of Sydney
Publications - 68
Citations - 1096
John O'Byrne is an academic researcher from University of Sydney. The author has contributed to research in topics: Spectrograph & Confocal. The author has an hindex of 17, co-authored 68 publications receiving 1054 citations. Previous affiliations of John O'Byrne include Australian Astronomical Observatory & National Institute of Advanced Industrial Science and Technology.
Papers
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Journal ArticleDOI
Hexabundles: imaging fiber arrays for low-light astronomical applications
Joss Bland-Hawthorn,Julia J. Bryant,Gordon Robertson,Peter Gillingham,John O'Byrne,Gerald Cecil,Roger Haynes,Scott M. Croom,Simon Ellis,Martin D. Maack,Peter M. W. Skovgaard,Danny Noordegraaf +11 more
TL;DR: A novel imaging fiber bundle ("hexabundle") that is suitable for low-light applications in astronomy and finds the important result that the cladding can be reduced to ~2 μm over the short fuse length, well below the conventional ~10λ thickness employed more generally.
Journal ArticleDOI
GNOSIS: The First Instrument to Use Fiber Bragg Gratings for OH Suppression
Christopher Q. Trinh,Simon Ellis,Simon Ellis,Joss Bland-Hawthorn,Jon Lawrence,Jon Lawrence,Anthony Horton,Sergio G. Leon-Saval,Keith Shortridge,Julia J. Bryant,Scott Case,Matthew Colless,Warrick J. Couch,Kenneth C. Freeman,Hans Gerd Löhmannsröben,Luke Gers,Karl Glazebrook,Roger Haynes,Steve Lee,John O'Byrne,Stan Miziarski,Martin Roth,Brian P. Schmidt,C. G. Tinney,Jessica Zheng +24 more
TL;DR: GNOSIS as mentioned in this paper is a prototype astrophotonic instrument that utilizes "OH suppression fibers" consisting of fiber Bragg gratings and photonic lanterns to suppress the 103 brightest atmospheric emission doublets between 1.47 and 1.7µm.
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An investigation of the effectiveness of electronic classroom communication systems in large lecture classes
TL;DR: The results show that students are comfortable with this technology and feel that, on the whole, interactive lectures are useful, and there is an improvement in students' exam performance, but there are too many competing factors to clearly say that this improvement is solely due to the use of the classroom communication system.
Journal ArticleDOI
GNOSIS: the first instrument to use fibre Bragg gratings for OH suppression
Christopher Q. Trinh,Simon Ellis,Joss Bland-Hawthorn,Jon Lawrence,Anthony Horton,Sergio G. Leon-Saval,Keith Shortridge,Julia J. Bryant,Scott W. Case,Matthew Colless,Warick Couch,Kenneth C. Freeman,Hans-Gerd Loehmannsroeben,Luke Gers,Karl Glazebrook,Roger Haynes,Steve Lee,John O'Byrne,Stan Miziarski,Martin Roth,Brian P. Schmidt,C. G. Tinney,Jessica Zheng +22 more
TL;DR: GNOSIS as discussed by the authors is a prototype astrophotonic instrument that utilizes OH suppression fibres consisting of fibre Bragg gratings and photonic lanterns to suppress the 103 brightest atmospheric emission doublets between 1.47-1.7 microns.
Journal ArticleDOI
The Relationship Between Attendance in Student‐centred Physics Tutorials and Performance in University Examinations
TL;DR: In this paper, the authors explore the relationship between attendance at the workshop tutorials and student performance in examinations and show that about 80% of the students attend more than two-thirds of the voluntary tutorials.