On the characterization of ultra-precise XUV-focusing mirrors by means of high angular resolution slope-measuring deflectometry

2019 ◽  
Author(s):  
Frank Siewert ◽  
Jana Buchheim ◽  
Grzegorz Gwalt ◽  
Jens Viefhaus
Keyword(s):  
Angular Resolution ◽  
High Angular Resolution

scholarly journals In vivo characterization of the connectivity and subcomponents of the human globus pallidus

2015 ◽  
Author(s):  
Patrick Beukema ◽  
Timothy Verstynen ◽  
Fang-Cheng Yeh
Keyword(s):  
Angular Resolution ◽  
Diffusion Imaging ◽  
Orientation Distribution ◽  
High Angular Resolution ◽  
Fiber Direction ◽  
Degree Of Anisotropy ◽  
In Vivo Characterization ◽  
Diffusion Properties

Projections from the substantia nigra and striatum traverse through the pallidum on the way to their targets. To date, in vivo characterization of these pathways remains elusive. Here we used high angular resolution diffusion imaging (N=138) to study the characteristics and structural subcompartments of the human pallidum. Our results show that the diffusion orientation distribution at the pallidum is asymmetrically oriented in a dorsolateral direction, consistent with the orientation of underlying fiber systems. Furthermore, compared to the outer pallidal segment, the internal segment has more peaks in the orientation distribution function and stronger anisotropy in the primary fiber direction, consistent with known cellular differences between the underlying nuclei. These differences in orientation, complexity, and degree of anisotropy are sufficiently robust to automatically segment the pallidal nuclei using diffusion properties. Thus the gray matter diffusion signal can be useful as an in vivo measure of the collective nigrostriatal and striatonigral pathways.

scholarly journals HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-resolution astronomy in the MeV-GeV range

2015 ◽  
Vol 650 ◽  
pp. 012016 ◽  
Author(s):  
Shaobo Wang ◽  
Denis Bernard ◽  
Philippe Bruel ◽  
Mickael Frotin ◽  
Yannick Geerebaert ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Angular Resolution ◽  
High Angular Resolution ◽  
Beam Characterization

scholarly journals Characterization of a submillimeter high-angular-resolution camera with a monolithic silicon bolometer array for the Caltech Submillimeter Observatory

1996 ◽  
Vol 35 (34) ◽  
pp. 6629 ◽  
Author(s):  
Ning Wang ◽  
T. R. Hunter ◽  
D. J. Benford ◽  
E. Serabyn ◽  
D. C. Lis ◽  
...  
Keyword(s):  
Angular Resolution ◽  
High Angular Resolution ◽  
Bolometer Array

High angular resolution slope measuring deflectometry for the characterization of ultra-precise reflective x-ray optics

2012 ◽  
Vol 23 (7) ◽  
pp. 074015 ◽  
Author(s):  
F Siewert ◽  
J Buchheim ◽  
T Höft ◽  
S Fiedler ◽  
G Bourenkov ◽  
...  
Keyword(s):  
Angular Resolution ◽  
High Angular Resolution ◽  
Ray Optics ◽  
X Ray

scholarly journals High angular resolution observations of the gas phase composition of young stellar objects

1997 ◽  
Vol 178 ◽  
pp. 31-44 ◽  
Author(s):  
Geoffrey A. Blake
Keyword(s):  
Gas Phase ◽  
Angular Resolution ◽  
Young Stellar Objects ◽  
High Angular Resolution ◽  
Stellar Objects ◽  
Star Forming ◽  
Circumstellar Material ◽  
The Past ◽  
Cloud Cores

Recent advances in the observational characterization of young stellar objects (YSOs) with millimeter-wave aperture synthesis arrays and (sub)millimeter single dish telescopes are reviewed. Studies of circumstellar material with ∼arc second resolution, which have only become possible at these frequencies within the past few years and which can potentially probe all stages of the star formation process, are emphasized. Molecules that are sensitive to different routes of formation and modification are outlined, including comments about their utility in distinguishing between a variety of environments and histories in star-forming cloud cores.

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