ECG baseline wander reduction using linear phase filters

The continuous real time reduction of baseline wander is a considerable problem in electrocardiography during exercises. Our solution consists of spectral filtering. The legitimacy of high-pass filtering of the ECG by means of digital linear phase filters with a low cut-off frequency as high as the heart rate is shown. The specifications of these filters are derived from experimental results. Special hardware is presented that simultaneously performs the desired real-time filter operation in four ECG leads

The Closer the Better: Similarity of Publication Pairs at Different Co-Citation Levels

We investigate the similarities of pairs of articles which are co-cited at the different co-citation levels of the journal, article, section, paragraph, sentence and bracket. Our results indicate that textual similarity, intellectual overlap (shared references), author overlap (shared authors), proximity in publication time all rise monotonically as the co-citation level gets lower (from journal to bracket). While the main gain in similarity happens when moving from journal to article co-citation, all level changes entail an increase in similarity, especially section to paragraph and paragraph to sentence/bracket levels. We compare results from four journals over the years 2010-2015: Cell, the European Journal of Operational Research, Physics Letters B and Research Policy, with consistent general outcomes and some interesting differences. Our findings motivate the use of granular co-citation information as defined by meaningful units of text, with implications for, among others, the elaboration of maps of science and the retrieval of scholarly literature

Discovery and Selection of Certified Web Services Through Registry-Based Testing and Verification

Reliability and trust are fundamental prerequisites for the establishment of functional relationships among peers in a Collaborative Networked Organisation (CNO), especially in the context of Virtual Enterprises where economic benefits can be directly at stake. This paper presents a novel approach towards effective service discovery and selection that is no longer based on informal, ambiguous and potentially unreliable service descriptions, but on formal specifications that can be used to verify and certify the actual Web service implementations. We propose the use of Stream X-machines (SXMs) as a powerful modelling formalism for constructing the behavioural specification of a Web service, for performing verification through the generation of exhaustive test cases, and for performing validation through animation or model checking during service selection

Duurzame landbouw in 2030 en landbouwdoeltypen

Relatie tussen economische, ecologische en sociaal-culturele duurzaamhei

Effecten van beheersbeperkingen op landbouwbedrijven : een bedrijfsvergelijkend onderzoek

Voor dit onderzoek zijn gedurende 4 jaar (1982/'83 t/m 1985/'86) gegevens verzameld van 45 melkveebedrijven in de veenweidegebieden en 8 in de zandgebiede

The hydration of divalent cations in aqueous solution : an x-ray investigation with isomorphous replacement

The x-ray diffraction patterns of M solns. of the nitrates of Co2+, Ni2 +, Zn2+, Mg2+, Cd2+, and Ca2+ were recorded with an Enraf-Nonius liq . jet diffraction camera. These cations were paired into 4 isomorphous groups based on the similarities of the cation-water distances in their cryst. hydrates. A theoretical expression was derived relating the electron distribution function to the difference in the intensities diffracted by a pair of isomorphous solns., and this function was obtained by calcg. the Fourier transform, using the measured intensities. The resulting electron distribution function exhibited a peak near 2 g, ascribed to the primary hydration layer, and a 2nd, less clear-cut, peak near 4 .ANG., attributed to the secondary hydration layer. Least-squares fits of these peaks yielded primary coordination nos. and cation water distances at 25°, and a secondary coordination no. of 12 ± 2. Cation-water distances were also obtained when minor deviations from isomorphism were taken into account

Resultaten van bedrijven met beheersbeperkingen

Beknopt verslag van een vergelijkend onderzoek naar de effecten van een beheersovereenkomst of van reservaatgrondgebruik op de bedrijfsvoering en resultaten van melkveebedrijven. Voor dit onderzoek zijn gedurende 4 jaar (1982 t/m '86) gegevens verzameld van zo'n 45 bedrijven in de veenweidegebieden en van 8 bedrijven in de zandgebiede