scholarly journals Wavelength-dependent absorption and scattering effects on laser cleaning of a corroded iron alloy European scale armor

2017 ◽  
Author(s):  
Marlene April Yandrisevits ◽  
◽  
Pablo Londero ◽  
Federico Carò ◽  
Adriana Rizzo ◽  
...  
Keyword(s):  
Iron Alloy ◽  
Laser Cleaning ◽  
Scattering Effects ◽  
Dependent Absorption

Electron crystallographic determination of the 3-D structure of staurolite at atomic resolution

1991 ◽  
Vol 49 ◽  
pp. 540-541
Author(s):  
Kenneth H. Downing ◽  
Hu Meisheng ◽  
Hans-Rudolf Went ◽  
Michael A. O'Keefe
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Atomic Resolution ◽  
Dimensional Structure ◽  
Structure Information ◽  
Resolution Electron ◽  
Scattering Effects ◽  
High Resolution Images ◽  
Effects Of Radiation

With current advances in electron microscope design, high resolution electron microscopy has become routine, and point resolutions of better than 2Å have been obtained in images of many inorganic crystals. Although this resolution is sufficient to resolve interatomic spacings, interpretation generally requires comparison of experimental images with calculations. Since the images are two-dimensional representations of projections of the full three-dimensional structure, information is invariably lost in the overlapping images of atoms at various heights. The technique of electron crystallography, in which information from several views of a crystal is combined, has been developed to obtain three-dimensional information on proteins. The resolution in images of proteins is severely limited by effects of radiation damage. In principle, atomic-resolution, 3D reconstructions should be obtainable from specimens that are resistant to damage. The most serious problem would appear to be in obtaining high-resolution images from areas that are thin enough that dynamical scattering effects can be ignored.

Dynamical Scattering in Electron Diffraction of wet Protein Crystals

1980 ◽  
Vol 38 ◽  
pp. 42-43
Author(s):  
B. B. Chang ◽  
D. F. Parsons
Keyword(s):  
Electron Diffraction ◽  
Scattering Theory ◽  
Protein Crystals ◽  
Electron Diffraction Data ◽  
Specimen Thickness ◽  
Major Question ◽  
X Ray ◽  
Scattering Effects ◽  
Diffraction Patterns ◽  
Acceleration Voltage

The significance of dynamical scattering effects remains the major question in the structural analysis by electron diffraction of protein crystals preserved in the hydrated state. In the few cases (single layers of purple membrane and 400-600 Å thick catalase crystals examined at 100 kV acceleration voltage) where electron-diffraction patterns were used quantitatively, dynamical scattering effects were considered unimportant on the basis of a comparison with x-ray intensities. The kinematical treatment is usually justified by the thinness of the crystal. A theoretical investigation by Ho et al. using Cowley-Moodie multislice formulation of dynamical scattering theory and cytochrome b5as the test object2 suggests that kinematical analysis of electron diffraction data with 100-keV electrons would not likely be valid for specimen thickness of 300 Å or more. We have chosen to work with electron diffraction patterns obtained from actual wet protein crystals (rat hemoglobin crystals of thickness range 1000 to 2500 Å) at 200 and 1000 kV and to analyze these for dynamical effects.

MULTIPLE SCATTERING EFFECTS IN THE COBALT K-EDGE EXAFS OF METAL CARBONYL COMPLEXES

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-589-C8-592
Author(s):  
N. BINSTED ◽  
S. L. COOK ◽  
J. EVANS ◽  
R. J. PRICE ◽  
G. N. GREAVES
Keyword(s):  
Multiple Scattering ◽  
Metal Carbonyl ◽  
Carbonyl Complexes ◽  
Metal Carbonyl Complexes ◽  
Scattering Effects ◽  
Multiple Scattering Effects

EFFECT OF ADDITION OF THIRD ELEMENT IN HIGH SILICON-IRON ALLOY

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-133-C8-134
Author(s):  
H. Nakamura ◽  
N. Tsuya ◽  
Y. Saito ◽  
Y. Katsumata ◽  
Y. Harada
Keyword(s):  
Iron Alloy ◽  
Silicon Iron ◽  
High Silicon

Investigation of acoustic monitoring in the laser cleaning of copper

1997 ◽  
Author(s):  
J. M. Lee ◽  
K. G. Watkins ◽  
A. Kearns ◽  
W. M. Steen ◽  
J. D. Ryan ◽  
...  
Keyword(s):  
Acoustic Monitoring ◽  
Laser Cleaning

On Path Generation Method for Laser Cleaning Robot Based on Line Structured Light

2020 ◽  
Author(s):  
Qingzeng Ma ◽  
Dongbin Zhang ◽  
Shuo Jin ◽  
Yuan Ren ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Structured Light ◽  
Laser Cleaning ◽  
Path Generation ◽  
Cleaning Robot ◽  
On Line

Scattering effects of solar panel on Space Station Space-To-Ground (SGS) antenna performance

1992 ◽  
Author(s):  
SHIAN HWU ◽  
LARRY JOHNSON ◽  
JON FOURNET ◽  
ROBERT PANNETON ◽  
DONALD EGGERS ◽  
...  
Keyword(s):  
Space Station ◽  
Solar Panel ◽  
Antenna Performance ◽  
Scattering Effects

MAGNESIL-N

Alloy Digest ◽  
1975 ◽  
Vol 24 (7) ◽  
Keyword(s):  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Iron Alloy ◽  
Heat Treating ◽  
Rolling Plane ◽  
Silicon Iron

Abstract MAGNESIL-N is a non-oriented silicon-iron alloy of exceptional magnetic qualities designed for applications involving frequencies of 400 Hertz and higher. It has good permeability in all directions of the rolling plane, and is designed for either punched or sheared laminations with random flux disposition. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on forming and heat treating. Filing Code: Fe-53. Producer or source: Spang Industries Inc..

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