Optical image analysis of the novel ultra-lightweight and high-resolution MEMS X-ray optics

2009 ◽  
Author(s):  
I. Mitsuishi ◽  
Y. Ezoe ◽  
U. Takagi ◽  
T. Hayashi ◽  
T. Sato ◽  
...  
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Optical Image ◽  
The Novel ◽  
Ray Optics ◽  
X Ray

Optical Image Analysis of the Novel Ultra-Lightweight and High-Resolution MEMS X-Ray Optics

2010 ◽  
Vol 46 (9) ◽  
pp. 1309-1312 ◽  
Author(s):  
I Mitsuishi ◽  
Y Ezoe ◽  
U Takagi ◽  
K Ishizu ◽  
T Moriyama ◽  
...  
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Optical Image ◽  
The Novel ◽  
Ray Optics ◽  
X Ray

scholarly journals Detection and spatiotemporal analysis of methane ebullition on thermokarst lake ice using high-resolution optical aerial imagery

2016 ◽  
Vol 13 (1) ◽  
pp. 27-44 ◽  
Author(s):  
P. R. Lindgren ◽  
G. Grosse ◽  
K. M. Walter Anthony ◽  
F. J. Meyer
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Image Acquisition ◽  
Optical Image ◽  
Aerial Imagery ◽  
Accurate Estimation ◽  
Lake Ice ◽  
Thermokarst Lakes ◽  
Thermokarst Lake ◽  
Methane Ebullition

Abstract. Thermokarst lakes are important emitters of methane, a potent greenhouse gas. However, accurate estimation of methane flux from thermokarst lakes is difficult due to their remoteness and observational challenges associated with the heterogeneous nature of ebullition. We used high-resolution (9–11 cm) snow-free aerial images of an interior Alaskan thermokarst lake acquired 2 and 4 days following freeze-up in 2011 and 2012, respectively, to detect and characterize methane ebullition seeps and to estimate whole-lake ebullition. Bubbles impeded by the lake ice sheet form distinct white patches as a function of bubbling when lake ice grows downward and around them, trapping the gas in the ice. Our aerial imagery thus captured a snapshot of bubbles trapped in lake ice during the ebullition events that occurred before the image acquisition. Image analysis showed that low-flux A- and B-type seeps are associated with low brightness patches and are statistically distinct from high-flux C-type and hotspot seeps associated with high brightness patches. Mean whole-lake ebullition based on optical image analysis in combination with bubble-trap flux measurements was estimated to be 174 ± 28 and 216 ± 33 mL gas m−2 d−1 for the years 2011 and 2012, respectively. A large number of seeps demonstrated spatiotemporal stability over our 2-year study period. A strong inverse exponential relationship (R2 >  =  0.79) was found between the percent of the surface area of lake ice covered with bubble patches and distance from the active thermokarst lake margin. Even though the narrow timing of optical image acquisition is a critical factor, with respect to both atmospheric pressure changes and snow/no-snow conditions during early lake freeze-up, our study shows that optical remote sensing is a powerful tool to map ebullition seeps on lake ice, to identify their relative strength of ebullition, and to assess their spatiotemporal variability.

Adaptive angular control of high-resolution x-ray optics

2010 ◽  
Author(s):  
Stanislav Stoupin ◽  
Frank Lenkszus ◽  
Robert Laird ◽  
Kurt Goetze ◽  
Kwang-Je Kim ◽  
...  
Keyword(s):  
High Resolution ◽  
Ray Optics ◽  
X Ray

Silicon pore optics: novel lightweight high-resolution x-ray optics developed for XEUS

2004 ◽  
Author(s):  
Marco Beijersbergen ◽  
Stefan Kraft ◽  
Ramses Gunther ◽  
Arjan L. Mieremet ◽  
Maximilien Collon ◽  
...  
Keyword(s):  
High Resolution ◽  
Ray Optics ◽  
X Ray

Novel ultra-lightweight and high-resolution MEMS X-ray optics for space astronomy

2012 ◽  
Vol 188 ◽  
pp. 411-416 ◽  
Author(s):  
Ikuyuki Mitsuishi ◽  
Yuichiro Ezoe ◽  
Kensuke Ishizu ◽  
Teppei Moriyama ◽  
Makoto Mita ◽  
...  
Keyword(s):  
High Resolution ◽  
Ray Optics ◽  
Space Astronomy ◽  
X Ray

1,4,8,11-Tetra[2-aryl-1-diazenyl]-1,4,8,11-tetraazacyclotetradecanes — Synthesis, characterization, and X-ray crystallography of the first tetrakistriazenes to be reported

2006 ◽  
Vol 84 (10) ◽  
pp. 1280-1289 ◽  
Author(s):  
Jeffery D Clarke ◽  
Keith Vaughan ◽  
Valerio Bertolasi
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Electrospray Mass Spectrometry ◽  
Diazonium Salt ◽  
Diazonium Salts ◽  
The Novel ◽  
Analogous Reaction ◽  
X Ray ◽  
X Ray Crystallography ◽  
The Mean

The reactions of a series of arene diazonium salts with 1,4,8,11-tetraazacyclotetradecane (cyclam) afford the novel compounds, the 1,4,8,11-tetra[2-aryl-1-diazenyl]-1,4,8,11-tetraazacyclotetradecanes (1a–1f), which are the first examples of tetrakistriazenes to be reported. The tetrakistriazenes were characterized by IR spectroscopy, proton and carbon NMR, elemental analysis, high resolution electrospray mass spectrometry, and X-ray crystallography. The analogous reaction of a diazonium salt with 1,4,7-triazacyclononane or 1,5,9-triazacyclododecane yields the tristriazenes 2, 3a, and 3b. The structures of compounds 1c and 1e were solved by X-ray crystallography at low temperature (150 K). Both molecules display a conformation where the four phenyltriazenyl groups point alternately upwards and downwards with respect to the mean macrocyclic plane.Key words: triazene, tetrakistriazene, cyclam, tetraazacyclotetradecane, X-ray, NMR, cyclic polyamines.

Beam collimation with polycapillary x-ray optics for high contrast high resolution monochromatic imaging

2004 ◽  
Vol 31 (12) ◽  
pp. 3288-3297 ◽  
Author(s):  
Francisca R. Sugiro ◽  
Danhong Li ◽  
C. A. MacDonald
Keyword(s):  
High Resolution ◽  
High Contrast ◽  
Ray Optics ◽  
X Ray ◽  
Monochromatic Imaging ◽  
Beam Collimation
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