ORCID Profile
0000-0002-0023-4363
Current Organisations
University of South Australia
,
University College London
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Publisher: American Geophysical Union
Date: 18-03-2013
DOI: 10.1029/GM102P0295
Publisher: American Geophysical Union
Date: 18-03-2013
DOI: 10.1029/GM102P0281
Publisher: Elsevier
Date: 2017
Publisher: American Geophysical Union
Date: 18-03-2013
DOI: 10.1029/GM102P0221
Publisher: Optica Publishing Group
Date: 12-2006
DOI: 10.1364/AO.45.008689
Abstract: The laboratory end-to-end testing of the Extreme-Ultraviolet Imaging Spectrometer (EIS) for the Solar-B satellite is reported. A short overview of the EIS, which observes in two bands in the extreme-ultraviolet wavelength range, is given. The calibration apparatus is described, including details of the light sources used. The data reduction and analysis procedure are outlined. The wavelength calibration using a Penning source to illuminate the aperture fully is presented. We discuss the aperture determination using a radiometrically calibrated hollow-cathode-based source. We then give an account of the predicted and measured efficiencies from consideration of the efficiencies of in idual optical elements in first order, an account of efficiencies out of band when radiation incident in one band is detected in the other, and efficiencies in multiple orders. The efficiencies measured in first order for in band and out of band are compared with the predictions and the sensitivity, and its uncertainties are derived. Application of the radiometric calibration is discussed.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Optica Publishing Group
Date: 12-2006
DOI: 10.1364/AO.45.008674
Abstract: The Extreme-Ultraviolet Imaging Spectrometer (EIS) is the first of a new generation of normal-incidence, two-optical-element spectroscopic instruments developed for space solar extreme-ultraviolet astronomy. The instrument is currently mounted on the Solar-B satellite for a planned launch in late 2006. The instrument observes in two spectral bands, 170-210 A and 250-290 A. The spectrograph geometry and grating prescription were optimized to obtain excellent imaging while still maintaining readily achievable physical and fabrication tolerances. A refined technique using low ruling density surrogate gratings and optical metrology was developed to align the instrument with visible light. Slit rasters of the solar surface are obtained by mechanically tilting the mirror. A slit exchange mechanism allows selection among four slits at the telescope focal plane. Each slit is precisely located at the focal plane. The spectrograph imaging performance was optically characterized in the laboratory. The resolution was measured using the Mg iii and Ne iii lines in the range of 171-200 A. The He ii line at 256 A and Ne iii lines were used in the range of 251-284 A. The measurements demonstrate an equivalent resolution of ~2 arc sec? on the solar surface, in good agreement with the predicted performance. We describe the EIS optics, mechanisms, and measured performance.
Publisher: Elsevier BV
Date: 06-2015
Publisher: Cambridge University Press (CUP)
Date: 31-10-2023
DOI: 10.1017/AER.2023.94
Publisher: SPIE
Date: 14-06-2006
DOI: 10.1117/12.671262
Publisher: Elsevier BV
Date: 03-2017
Publisher: IEEE
Date: 09-2014
Publisher: Springer Science and Business Media LLC
Date: 22-03-2007
Publisher: American Accounting Association
Date: 02-09-2021
DOI: 10.2308/JMAR-19-047
Abstract: This case study develops our understanding of the ways in which management control and creativity coexist within organizations. We extend current understandings of how management control and creativity may combine by theorizing a broad typological framework comprising four basic forms. We postulate that not only can control and creativity coexist, but that they are mutually reliant and can function concurrently to differing extents within one operational entity as circumstances dictate. The case we use to illustrate our framework is based on a review of NASA documentation and first-person accounts of the ill-fated Apollo 13 mission, during which the need to manage the apparent dichotomy between control and creativity was literally a matter of life and death. Our findings serve as a foundational basis for further empirical and theoretical enquiry and offer research directions that may provide a deeper understanding of the ways in which control and creativity may combine. JEL Classifications: M00 M41.
Publisher: SPIE
Date: 06-02-2003
DOI: 10.1117/12.450868
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Adrian James.