Instrument prototypes of miniature near-UV imaging spectro-polarimeters for observations of solar magnetism

2018 ◽  
Author(s):  
Phillip H. Oakley ◽  
Roberto Casini ◽  
Scott Sewell ◽  
Nicole Ela
Keyword(s):  
Solar Magnetism ◽  
Uv Imaging

The Sun as a Magnetic Star

1976 ◽  
Vol 32 ◽  
pp. 457-463
Author(s):  
John M. Wilcox ◽  
Leif Svalgaard
Keyword(s):  
Recent Work ◽  
Rotation Axis ◽  
Polar Field ◽  
Magnetic Star ◽  
Rotational Axis ◽  
Field Variation ◽  
The Sun ◽  
Arbitrary Angle ◽  
Solar Magnetism ◽  
Oblique Rotator

SummaryThe sun as a magnetic star is described on the basis of recent work on solar magnetism. Observations at an arbitrary angle to the rotation axis would show a 22-year polar field variation and a 25-day equatorial sector variation. The sector variation would be similar to an oblique rotator with an angle of 90° between the magnetic and rotational axis.

scholarly journals Characterization and Identification of Varnishes on Copper Alloys by Means of UV Imaging and FTIR

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 298
Author(s):  
Miriam Truffa Giachet ◽  
Julie Schröter ◽  
Laura Brambilla
Keyword(s):  
Copper Alloys ◽  
Analytical Techniques ◽  
Experimental Methodology ◽  
Artificial Ageing ◽  
Non Invasive ◽  
Uv Imaging ◽  
Before And After ◽  
The Comparative Study ◽  
The 19Th Century ◽  
Analytical Tools

The application of varnishes on the surface of metal objects has been a very common practice since antiquity, both for protective and aesthetic purposes. One specific case concerns the use of tinted varnishes on copper alloys in order to mimic gilding. This practice, especially flourishing in the 19th century for scientific instruments, decorative objects, and liturgical items, results in large museum collections of varnished copper alloys that need to be preserved. One of the main challenges for conservators and restorers deals with the identification of the varnishes through non-invasive and affordable analytical techniques. We hereby present the experimental methodology developed in the framework of the LacCA and VERILOR projects at the Haute École ARC of Neuchâtel for the identification of gold varnishes on brass. After extensive documentary research and analytical campaigns on varnished museum objects, various historic shellac-based varnishes were created and applied by different methods on a range of brass substrates with different finishes. The samples were then characterized by UV imaging and infrared spectroscopy before and after artificial ageing. The comparative study of these two techniques was performed for different thicknesses of the same varnish and for different shellac grades in order to implement an identification methodology based on simple non-invasive examination and analytical tools, which are accessible to conservators.

scholarly journals Study on the Influence Factors of Rod Plate Gap Corona Discharge Environment Based on UV Imaging

2020 ◽  
Vol 16 (1) ◽  
pp. 35-43
Author(s):  
Shenghui Wang ◽  
Wei Li ◽  
Tingyue Jiang ◽  
Leilei Niu ◽  
Fangcheng Lv ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Influence Factors ◽  
Uv Imaging

Multispectral UV imaging for fast and non-destructive quality control of chemical and physical tablet attributes

2016 ◽  
Vol 90 ◽  
pp. 85-95 ◽  
Author(s):  
Marten Klukkert ◽  
Jian X. Wu ◽  
Jukka Rantanen ◽  
Jens M. Carstensen ◽  
Thomas Rades ◽  
...  
Keyword(s):  
Quality Control ◽  
Uv Imaging ◽  
Non Destructive

Solar Magnetism

Science ◽  
1942 ◽  
Vol 95 (2462) ◽  
pp. 10-10
Keyword(s):  
Solar Magnetism

A study of the impact of excipient shielding on initial drug release using UV imaging

2018 ◽  
Vol 553 (1-2) ◽  
pp. 229-237 ◽  
Author(s):  
Tze Ning Hiew ◽  
Muhammad Ismail Bin Alaudin ◽  
Siang Meng Chua ◽  
Paul Wan Sia Heng
Keyword(s):  
Drug Release ◽  
Uv Imaging ◽  
The Impact ◽  
Initial Drug

Development of small unit cell avalanche photodiodes for UV imaging applications

2012 ◽  
Author(s):  
Ashok K. Sood ◽  
Roger E. Welser ◽  
Robert A. Richwine ◽  
Yash R. Puri ◽  
Russell D. Dupuis ◽  
...  
Keyword(s):  
Avalanche Photodiodes ◽  
Unit Cell ◽  
Small Unit ◽  
Uv Imaging ◽  
Small Unit Cell
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