Comparison of various types of remote sensing data over the Tsaoling landslide within 18 months of the September 1999 magnitude 7.6 Chi Chi earthquake in central Taiwan.
a) Surface classification map made from radar scattering mechanisms obtained through analysis of airborne L-band (0.25 m wavelength) Synthetic Aperture Radar (SAR) polarimetry (obtained September 27, 2000). Purple = bare surface, green = forest, black = other (including missing data).
b) Grayscale C-band (0.06 m wavelength) image of vertically-polarized backscatter SAR intensity (obtained September 27, 2000).
c) False-color image of Landsat 7 Thematic Mapper (TM) data (February 2001). Green areas are forested, the purple areas are the landslide source area and debris apron, dark areas in the lower half of image are lakes impounded by landslide. Vegetation regrowth is occurring on the debris apron 18 months after the landslide. Compare with radar classification map in a),
d) Indian Research Satellite visible band panchromatic data (October 31, 1999) obtained within six weeks of the landslide. The landslide is the light colored
Columbia researchers develop "fingerprinting" techniques for SAR mapping
Research by scientists at the Lamont-Doherty Earth Observatory at Columbia University shows that Synthetic Aperture Radar (SAR) polarimetry is a more superior technology for rapidly identifying disaster zones than the currently used optical remote sensing technologies, such as Landsat and SPOT. Their findings are published in the Journal of Geophysical Research, and coincide with an opportunity to outfit satellites scheduled for deployment in 2004 with SAR polarimetry instruments.
Rapidly assessing land damage and responding to natural disasters is key to saving lives. SAR mapping has a clear advantage over optical mapping-the results are not hindered by darkness, clouds, or the smoke and dust frequently associated with disaster zones. This new SAR research marks the initial step in developing radar-based maps of damaged landscapes that can be rapidly provided to rescue workers.
Construction of practical quantum computers radically simplified
05.12.2016 | University of Sussex
UT professor develops algorithm to improve online mapping of disaster areas
29.11.2016 | University of Tennessee at Knoxville
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
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In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
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The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
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