Aerosol particle sensor based on millimeter wave coherent radar with high spatial resolution

Author(s):  
Alexander Teplyuk ◽  
Reinhard Knoechel ◽  
Grigory Khlopov
1980 ◽  
Vol 87 ◽  
pp. 39-40 ◽  
Author(s):  
O.E.H. Rydbeck ◽  
Å. Hjalmarson ◽  
G. Rydbeck ◽  
J. Elldér ◽  
A. Sume ◽  
...  

The distributions of the H13CN, H12CN and H12CO+ J =1-0 lines have been mapped with 20″ spacing towards the Orion A molecular cloud using the new Onsala 20 m millimeter wave telescope equipped with a room temperature mixer. The aperture and main beam efficiencies are about 49 and 65% and the half power beam width is ∼ 43″. The absolute pointing accuracy is estimated to be better than 5″ rms in the Orion elevation range.


2004 ◽  
Vol 75 (3) ◽  
pp. 684-688 ◽  
Author(s):  
Myungsik Kim ◽  
Jooyoung Kim ◽  
Hyun Kim ◽  
Songhui Kim ◽  
Jongil Yang ◽  
...  

Author(s):  
K. Przybylski ◽  
A. J. Garratt-Reed ◽  
G. J. Yurek

The addition of so-called “reactive” elements such as yttrium to alloys is known to enhance the protective nature of Cr2O3 or Al2O3 scales. However, the mechanism by which this enhancement is achieved remains unclear. An A.E.M. study has been performed of scales grown at 1000°C for 25 hr. in pure O2 on Co-45%Cr implanted at 70 keV with 2x1016 atoms/cm2 of yttrium. In the unoxidized alloys it was calculated that the maximum concentration of Y was 13.9 wt% at a depth of about 17 nm. SIMS results showed that in the scale the yttrium remained near the outer surface.


Author(s):  
E. G. Rightor

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.


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