High resolution positron Q-value measurements and nuclear structure studies far from the stability line. Progress report, July 1, 1979-June 30, 1980. [Dept. of Physics and Astronomy, Univ. of South Carolina, Columbia]

It is well known that the resolution of bio-molecules in a high resolution electron microscope depends not just on the physical resolving power of the instrument, but also on the stability of these molecules under the electron beam. Experimentally, the damage to the bio-molecules is commo ly monitored by the decrease in the intensity of the diffraction pattern, or more quantitatively by the decrease in the peaks of an energy loss spectrum. In the latter case the exposure, EC, to decrease the peak intensity from IO to I’O can be related to the molecular dissociation cross-section, σD, by EC = ℓn(IO /I’O) /ℓD. Qu ntitative data on damage cross-sections are just being reported, However, the microscopist needs to know the explicit dependence of damage on: (1) the molecular properties, (2) the density and characteristics of the molecular film and that of the support film, if any, (3) the temperature of the molecular film and (4) certain characteristics of the electron microscope used

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THE USE OF A FLOOD DISRUPTION SCALE TO COMMUNICATE HIGH RESOLUTION FLOOD HAZARD USING PARCEL SCALE TIDAL AND RAINFALL RUNOFF MODELS FOR PLANNING IN CHARLESTON, SOUTH CAROLINA

10.1130/abs/2020se-345167 ◽

2020 ◽

Author(s):

Norman S. Levine ◽

◽

Landon C. Knapp ◽

Sarah Watson ◽

Casey Conrad

Keyword(s):

South Carolina ◽

High Resolution ◽

Flood Hazard ◽

Rainfall Runoff

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Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

Physical Review C ◽

10.1103/physrevc.104.015805 ◽

2021 ◽

Vol 104 (1) ◽

Author(s):

A. V. Voinov ◽

K. Brandenburg ◽

C. R. Brune ◽

R. Giri ◽

S. M. Grimes ◽

...

Keyword(s):

Neutron Capture ◽

Imaginary Potential ◽

The Stability ◽

Capture Rates ◽

Stability Line

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Resolving pre-collapse slope motion at the February 2021 Chamoli rock-ice avalanche via feature tracking of optical satellite imagery

10.5194/egusphere-egu21-16597 ◽

2021 ◽

Author(s):

Maximillian Van Wyk de Vries ◽

Shashank Bhushan ◽

David Shean ◽

Etienne Berthier ◽

César Deschamps-Berger ◽

...

Keyword(s):

High Resolution ◽

Satellite Imagery ◽

Feature Tracking ◽

Satellite Image ◽

Image Feature ◽

Sampling Distance ◽

Velocity Changes ◽

The Stability ◽

Slide Area ◽

Ice Avalanche

<p>On the 7<sup>th</sup> of February 2021, a large rock-ice avalanche triggered a debris flow in Chamoli district, Uttarakhand, India, resulting in over 200 dead or missing and widespread infrastructure damage. The rock-ice avalanche originated from a steep, glacierized north-facing slope with a history of instability, most recently a 2016 ice avalanche. In this work, we assess whether the slope exhibited any precursory displacement prior to collapse. We evaluate monthly slope motion over the 2015 and 2021 period through feature tracking of high-resolution optical satellite imagery from Sentinel-2 (10 m Ground Sampling Distance) and PlanetScope (3-4 m Ground Sampling Distance). Assessing slope displacement of the underlying rock is complicated by the presence of glaciers over a portion of the collapse area, which display surface displacements due to internal ice deformation. We overcome this through tracking the motion over ice-free portions of the slide area, and evaluating the spatial pattern of velocity changes in glaciated areas. Preliminary results show that the rock-ice avalanche bloc slipped over 10 m in the 5 years prior to collapse, with particularly rapid slip occurring in the summer of 2017 and 2018. These results provide insight into the precursory conditions of the deadly rock-ice avalanche, and highlight the potential of high-resolution optical satellite image feature tracking for monitoring the stability of high-risk slopes.</p>

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