The resolution obtainable in electron microscopic autoradiographs, using a photographic emulsion consisting of a monolayer of silver bromide crystals, was investigated theoretically and experimentally. The expected distribution of exposed crystals around a point source was calculated from the geometry of the preparation and from the range distribution of the beta particles emitted by tritium. F...

The ‘small-molecule’ program SHELXL is finding increased application in refinement of macromolecules against high resolution data. SHELXL is slow (compared with other macromolecular programs) but very general. Even with data to atomic resolution, restraints are still required for anisotropic refinement and handling disorder. Full-matrix refinement is useful in the initial rigid group refinement...

We present a framework for speech enhancement and robust speech recognition that exploits the harmonic structure of speech. We achieve substantial gains in signal to noise ratio (SNR) of enhanced speech as well as considerable gains in accuracy of automatic speech recognition in very noisy conditions. The method exploits the harmonic structure of speech by employing a high frequency resolution ...

The generation of high-resolution mosaics from multiple images is presented. The estimation of the high-resolution signal utilizes a motion-compensated filtering approach for video frames that are affected by spatial aliasing. For that, global motion models and the corresponding estimation algorithms are employed to provide a very accurate and continuous description of sub-pixel motion for the ...

Standard lidar systems provide profiles of the attenuated backscatter signal. These can be assembled into images with spatial and temporal resolution adequate for practically all problems of atmospheric research. However, the attenuated backscatter signal is a quantity that is composed of different atmospheric properties. Extremely valuable for an assessment of the state of the atmosphere, they...

The evolution of photoelectron spectroscopy of neutral molecules in the gas phase from its first applications in the early 1960s to the present day is reviewed with emphasis on the description of methods that have contributed to improve the resolution. In early days, photoelectron spectroscopy was very successfully used to study the electronic structure of molecules. As the resolution improved,...

High resolution paleoclimatology involves studies of natural archives as proxies for past climate variations at a temporal scale that is comparable to that of instrumental data. In practice, this generally means annually resolved records, from tree rings, ice cores, banded corals, laminated speleothems and varved sediments. New analytical techniques offer many unexplored avenues of research in ...

We have measured low field dc and low frequency ac magnetic properties of high quality magnetite single crystals with continuously reading high resolution SQUID magnetometer in a temperature range of 5 – 150 K. In these data several features can be observed: the anisotropy point around 130 K, Verwey transition near 122 K, glass-like transition around 40 K and finally anomalous magnetic behaviou...