Provider: - Institution: National Library of the Netherlands - Koninklijke Bibliotheek - Data provided by Europeana Collections- All metadata published by Europeana are available free of restriction ...under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
The development of a system for detecting the presence and estimating the phase of the visual evoked potential in the electroencephalogram (EEG) of a human subject is presented. The stimulus set ...consists of several light emitting diodes (LEDs), all flashing at a rate of 10 Hz but with differing phases. The system employs a combination of wavelet prefiltering, harmonic preprocessing, neural network detection and phase discrimination and postprocessing of the neural network outputs. After an initial training period, the system is able to determine from the EEG at which of the LEDs the subject is looking with a rate of error of less than 20% within an interval of 0.8 seconds.
Benchmarking Flaws Undermine Security Research van der Kouwe, Erik; Heiser, Gernot; Andriesse, Dennis ...
IEEE security & privacy,
2020-May-June, 2020-5-00, Letnik:
18, Številka:
3
Magazine Article
Benchmarking systems is difficult. Mistakes can compromise guarantees and threaten reproducibility and comparability. We conduct a study to show that benchmarking flaws are widespread in systems ...security defense papers, even at tier-1 venues. We aim to raise awareness and provide recommendations for safeguarding the scientific process in our community.
The densities, viscosities, and surface tensions of molten sodium chlorate, and of molten mixtures of sodium chlorate and sodium nitrate, as well as the change of volume on fusion, have been ...determined.From the dependence of molar volume on temperature and composition, it appears that the mixing of sodium chlorate and sodium nitrate is a process of dilution rather than of interaction. The viscosity of sodium chlorate is found to be much lower than that of lithium chlorate, a possible indication of greater complexity in the lithium chlorate melt. The activation energy of viscous flow for sodium chlorate is less than that of lithium chlorate. For lithium chlorate - lithium nitrate mixtures, at constant temperature, there is pronounced positive deviation from linearity, when viscosity is plotted against molar composition. For sodium chlorate - sodium nitrate mixtures, the deviation is much less marked though still positive.The surface tension of sodium chlorate is almost identical with those of lithium and potassium chlorates. The surface heat of sodium chlorate is higher than that of lithium chlorate but it still indicates some degree of covalency. The Guggenheim formula and Sokolov's rule have been applied. In contrast to melts of mixtures of lithium chlorate and lithium nitrate, the sodium salt melts would appear to have simpler constituents and to be more ionic in character.
The specific and equivalent conductances of molten sodium chlorate and of its mixtures with sodium nitrate have been determined over the temperature range 240-280 °C. The results are treated as ...temperature functions at constant composition and as composition functions at constant temperature. From these data, the activation energies of conductance have been derived. The results have been compared with various theoretical equations and the conclusion is made that, while melts containing lithium chlorate may be associated or complexed in some way, the sodium chlorate melts show less of such a structure and are more ionic.
The following properties have been determined by direct experiment for pure sodium chlorate and its mixtures with sodium nitrate: heat capacity (both solid and liquid) and heat of fusion. From these ...experimental quantities, the following properties have been derived: entropy of fusion, heat of mixing, and free energy and entropy of mixing. The results have been compared with our previous results for the corresponding lithium chlorate - lithium nitrate system. On the whole, the conclusion is justified that the structure of melts containing lithium chlorate is more complex than that of melts involving sodium chlorate.
