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  1. Book: Einfluß der plastischen Verformung auf die Fugenbildung bei 10 mm-Massivparkett

    Kox, S.

    1998  

    Abstract: In der vorliegenden Diplomarbeit erfolgte eine Zweiteilung der Untersuchung in einen holztechnologischen Teil, der an Parkettstäben durchgeführt wurde, und einen stärker praxisorientierten Teil, der an Modellböden durchgeführt wurde. Die Parkettstäbe bzw. ...

    Institution Hamburg Univ. (Germany). Ordinariat fuer Holztechnologie
    Abstract In der vorliegenden Diplomarbeit erfolgte eine Zweiteilung der Untersuchung in einen holztechnologischen Teil, der an Parkettstäben durchgeführt wurde, und einen stärker praxisorientierten Teil, der an Modellböden durchgeführt wurde. Die Parkettstäbe bzw. Modellböden wurden jeweils zunächst einem Feuchtklima ausgesetzt, um durch Quelldruckspannungen plastische Verformungen quer zur Faserrichtung zu induzieren, und anschließend in einem Trockenklima gelagert, um die entstehenden Fugenbreiten zu ermitteln.
    Keywords Feuchtigkeitsgehalt ; Quellung ; Feuchtigkeit ; Schrumpfung ; Messen ; Dichte ; Laubholz ; Testen ; Quercus ; Holzfehler ; Lagerung ; Fussboden
    Language German
    Document type Book
    Database ELFIS - Nutrition, agriculture and forestry information system

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  2. Book ; Online: Contrail study with ground-based cameras

    Schumann, U. / Hempel, R. / Flentje, H. / Garhammer, M. / Graf, K. / Kox, S. / Lösslein, H. / Mayer, B.

    eISSN: 1867-8548

    2018  

    Abstract: Photogrammetric methods and analysis results for contrails observed with wide-angle cameras are described. Four cameras of two different types (view angle < 90° or whole-sky imager) at the ground at various positions are used to track contrails and to ... ...

    Abstract Photogrammetric methods and analysis results for contrails observed with wide-angle cameras are described. Four cameras of two different types (view angle < 90° or whole-sky imager) at the ground at various positions are used to track contrails and to derive their altitude, width, and horizontal speed. Camera models for both types are described to derive the observation angles for given image coordinates and their inverse. The models are calibrated with sightings of the Sun, the Moon and a few bright stars. The methods are applied and tested in a case study. Four persistent contrails crossing each other, together with a short-lived one, are observed with the cameras. Vertical and horizontal positions of the contrails are determined from the camera images to an accuracy of better than 230 m and horizontal speed to 0.2 m s −1 . With this information, the aircraft causing the contrails are identified by comparison to traffic waypoint data. The observations are compared with synthetic camera pictures of contrails simulated with the contrail prediction model CoCiP, a Lagrangian model using air traffic movement data and numerical weather prediction (NWP) data as input. The results provide tests for the NWP and contrail models. The cameras show spreading and thickening contrails, suggesting ice-supersaturation in the ambient air. The ice-supersaturated layer is found thicker and more humid in this case than predicted by the NWP model used. The simulated and observed contrail positions agree up to differences caused by uncertain wind data. The contrail widths, which depend on wake vortex spreading, ambient shear and turbulence, were partly wider than simulated.
    Subject code 551
    Language English
    Publishing date 2018-01-15
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  3. Book ; Online: VADUGS

    Bugliaro, Luca / Piontek, Dennis / Kox, Stephan / Schmidl, Marius / Mayer, Bernhard / Müller, Richard / Vázquez-Navarro, Margarita / Peters, Daniel M. / Grainger, Roy G. / Gasteiger, Josef / Kar, Jayanta

    eISSN: 1684-9981

    a neural network for the remote sensing of volcanic ash with MSG/SEVIRI trained with synthetic thermal satellite observations simulated with a radiative transfer model

    2022  

    Abstract: After the eruption of volcanoes around the world, monitoring of the dispersion of ash in the atmosphere is an important task for satellite remote sensing since ash represents a threat to air traffic. In this work we present a novel method, tailored for ... ...

    Abstract After the eruption of volcanoes around the world, monitoring of the dispersion of ash in the atmosphere is an important task for satellite remote sensing since ash represents a threat to air traffic. In this work we present a novel method, tailored for Eyjafjallajökull ash but applicable to other eruptions as well, that uses thermal observations of the SEVIRI imager aboard the geostationary Meteosat Second Generation satellite to detect ash clouds and determine their mass column concentration and top height during the day and night. This approach requires the compilation of an extensive data set of synthetic SEVIRI observations to train an artificial neural network. This is done by means of the RTSIM tool that combines atmospheric, surface and ash properties and runs automatically a large number of radiative transfer calculations for the entire SEVIRI disk. The resulting algorithm is called “VADUGS” (Volcanic Ash Detection Using Geostationary Satellites) and has been evaluated against independent radiative transfer simulations. VADUGS detects ash-contaminated pixels with a probability of detection of 0.84 and a false-alarm rate of 0.05. Ash column concentrations are provided by VADUGS with correlations up to 0.5, a scatter up to 0.6 g m −2 for concentrations smaller than 2.0 g m −2 and small overestimations in the range 5 %–50 % for moderate viewing angles 35–65 ∘ , but up to 300 % for satellite viewing zenith angles close to 90 or 0 ∘ . Ash top heights are mainly underestimated, with the smallest underestimation of −9 % for viewing zenith angles between 40 and 50 ∘ . Absolute errors are smaller than 70 % and with high correlation coefficients of up to 0.7 for ash clouds with high mass column concentrations. A comparison with spaceborne lidar observations by CALIPSO/CALIOP confirms these results: For six overpasses over the ash cloud from the Puyehue-Cordón Caulle volcano in June 2011, VADUGS shows similar features as the corresponding lidar data, with a correlation coefficient of 0.49 and an overestimation of ash column concentration by 55 %, although still in the range of uncertainty of CALIOP. A comparison with another ash algorithm shows that both retrievals provide plausible detection results, with VADUGS being able to detect ash further away from the Eyjafjallajökull volcano, but sometimes missing the thick ash clouds close to the vent. VADUGS is run operationally at the German Weather Service and this application is also presented.
    Subject code 333
    Language English
    Publishing date 2022-03-30
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online: Combining radiative transfer calculations and a neural network for the remote sensing of volcanic ash using MSG/SEVIRI

    Bugliaro, Luca / Piontek, Dennis / Kox, Stephan / Schmidl, Marius / Mayer, Bernhard / Müller, Richard / Vázquez-Navarro, Margarita / Peters, Daniel M. / Grainger, Roy G. / Gasteiger, Josef / Kar, Jayanta

    eISSN: 1684-9981

    2021  

    Abstract: After the eruption of volcanoes all over the world the monitoring of the dispersion of ash in the atmosphere is an important task for satellite remote sensing since ash represents a threat to air traffic. In this work we present a novel method that uses ... ...

    Abstract After the eruption of volcanoes all over the world the monitoring of the dispersion of ash in the atmosphere is an important task for satellite remote sensing since ash represents a threat to air traffic. In this work we present a novel method that uses thermal observations of the SEVIRI imager aboard the geostationary Meteosat Second Generation satellite to detect ash clouds and determine their mass column concentration and top height during day and night. This approach requires the compilation of an extensive data set of synthetic SEVIRI observations to train an artificial neural network. This is done by means of the RTSIM tool that combines atmospheric, surface and ash properties and runs automatically a large number of radiative transfer calculations for the entire SEVIRI disk. The resulting algorithm is called VADUGS (Volcanic Ash Detection Using Geostationary Satellites) and has been evaluated against independent radiative transfer simulations. VADUGS detects ash contaminated pixels with a probability of detection of 0.84 and a false alarm rate of 0.05. Ash column concentrations are provided by VADUGS with correlations up to 0.5, a scatter up to 0.6 g m −2 for concentrations smaller than 2.0 g m −2 and small overestimations in the range 5–50 % for moderate viewing angles 35–65°, but up to 300 % for satellite viewing zenith angles close to 90° or 0°. Ash top heights are mainly underestimated, with the smallest underestimation of −9 % for viewing zenith angles between 40° and 50°. Absolute errors are smaller than 70 % and with high correlation coefficients up to 0.7 for ash clouds with high mass column concentrations. A comparison against spaceborne lidar observations by CALIPSO/CALIOPconfirms these results. VADUGS is run operationally at the German Weather Service and this application is presented as well.
    Subject code 333
    Language English
    Publishing date 2021-09-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  5. Book ; Online: From Parity Violation to Hadronic Structure and more

    de Jager, K / Kox, S / Lhuillier, David

    (Proceedings of the 3rd International Workshop Held at Milos, Greece, May 16-20, 2006)

    2008  

    Abstract: This book contains the proceedings of the third international workshop on a oeFrom Parity Violation to Hadronic Structure and more ... a which was held from May 16 to May 20, 2006, at the George Eliopoulos conference center on the Greek island of Milos. ... ...

    Series title Proceedings of the 3rd International Workshop Held at Milos, Greece, May 16-20, 2006
    Abstract This book contains the proceedings of the third international workshop on a oeFrom Parity Violation to Hadronic Structure and more ...a which was held from May 16 to May 20, 2006, at the George Eliopoulos conference center on the Greek island of Milos. It is part of a series that started in Mainz in 2002 and was followed by a second workshop in Grenoble in 2004. While originally initiated by the extraction of the strangeness contribution to the electromagnetic form factors of the nucleon, the workshop series has continuously broadened the focus to the application of Parity Violation using hadr
    Language English
    Size Online-Ressource (255 p)
    Publisher Springer
    Publishing place Dordrecht
    Document type Book ; Online
    Note Description based upon print version of record
    ISBN 9783540744122 ; 3540744126
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Book ; Online: From Parity Violation to Hadronic Structure and More

    Kox, Serge / Lhuillier, David / Maas, Frank

    2007  

    Abstract: This volume contains the selected and refereed papers from a new series of regularly held meetings on the fundamental issues and applications of parity violation in nuclear and particle ... ...

    Abstract This volume contains the selected and refereed papers from a new series of regularly held meetings on the fundamental issues and applications of parity violation in nuclear and particle physics
    Language English
    Size Online-Ressource (197 p)
    Publisher Springer
    Publishing place Dordrecht
    Document type Book ; Online
    Note Description based upon print version of record
    ISBN 9783540255017 ; 354025501X
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Book ; Conference proceedings ; Online: From Parity Violation to Hadronic Structure and more

    Kox, Serge / Lhuillier, David / Maas, Frank / Wiele, Jacques

    Refereed and selected contributions, Grenoble, France, June 8-11, 2004

    2005  

    Abstract: This volume contains the selected and refereed papers from a new series of regularly held meetings on the fundamental issues and applications of parity violation in nuclear and particle physics ... This volume contains the selected and refereed papers from ...

    Event/congress Conference 'From Parity Violation to Hadron Structure and More' (2, 2004.06.08-11, Grenoble) ; PAVI 2004 (2004.06.08-11, Grenoble) ; Workshop 'From Parity Violation to Hadron Structure and More' (2, 2004.06.08-11, Grenoble)
    Author's details edited by Serge Kox, David Lhuillier, Frank Maas, Jacques Wiele
    Abstract This volume contains the selected and refereed papers from a new series of regularly held meetings on the fundamental issues and applications of parity violation in nuclear and particle physics

    This volume contains the selected and refereed papers from a new series of regularly held meetings on the fundamental issues and applications of parity violation in nuclear and particle physics.
    Keywords Nuclear physics ; Physics ; Quantum theory ; Technik / Wissen Physik
    Language English
    Size Online-Ressource, v.: digital
    Publisher SIF and Springer-Verlag Berlin Heidelberg
    Publishing place Berlin, Heidelberg
    Document type Book ; Conference proceedings ; Online
    Note Description based upon print version of record
    ISBN 9783540255017 ; 9783540263456 ; 354025501X ; 3540263454
    DOI 10.1007/b137440
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Thesis ; Book: Einfluss verschiedener Trainingsmethoden auf leistungsphysiologische, metabolische und körperkompositorische Parameter

    Kox, Sonja / Salentin, Fabian

    eine Fallstudie

    2005  

    Author's details von Sonja Kox und Fabian Salentin
    Size III, 176 Blatt: graphische Darstellungen
    Document type Thesis ; Book
    Thesis / German Habilitation thesis Köln, Deutsche Sporthochschule, Diplomarbeit 2005
    HBZ-ID HT014746376
    Database Central Library of Sport Science of the German Sport University Cologne

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  9. Article ; Online: Sterile Neutrino Constraints from the STEREO Experiment with 66 Days of Reactor-On Data.

    Almazán, H / Sanchez, P Del Amo / Bernard, L / Blanchet, A / Bonhomme, A / Buck, C / Favier, J / Haser, J / Hélaine, V / Kandzia, F / Kox, S / Lamblin, J / Letourneau, A / Lhuillier, D / Lindner, M / Manzanillas, L / Materna, T / Minotti, A / Montanet, F /
    Pessard, H / Real, J-S / Roca, C / Salagnac, T / Schoppmann, S / Sergeyeva, V / Soldner, T / Stutz, A / Zsoldos, S

    Physical review letters

    2018  Volume 121, Issue 16, Page(s) 161801

    Abstract: The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in six different ... ...

    Abstract The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in six different detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this Letter, results from 66 days of reactor turned on and 138 days of reactor turned off are reported. A novel method to extract the antineutrino rates has been developed based on the distribution of the pulse shape discrimination parameter. The test of a new oscillation toward a sterile neutrino is performed by comparing ratios of cells, independent of absolute normalization and of the prediction of the reactor spectrum. The results are found to be compatible with the null oscillation hypothesis and the best fit of the reactor antineutrino anomaly is excluded at 97.5% C.L.
    Language English
    Publishing date 2018-11-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.161801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

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  10. Article: Influence of plastic deformation of the gap width of 10 mm parquet

    Schwab, E. / Kox, S. / Rapp, A.O.

    Holzforschung und Holzverwertung

    1999  

    Abstract: Beim 10 mm-Stabparkett wird häufiger über Schadensfälle berichtet als beim konventionellen 22 mm-Stabparkett. Neben Aufwölbungen und Ablösungen von Parkettstäben gilt die übermäßige Fugenbildung während der Heizperiode als eine wesentliche ... ...

    Institution Bundesforschungsanstalt fuer Forst- und Holzwirtschaft, Hamburg (Germany). Inst. fuer Holzphysik und Mechanische Technologie des Holzes
    Abstract Beim 10 mm-Stabparkett wird häufiger über Schadensfälle berichtet als beim konventionellen 22 mm-Stabparkett. Neben Aufwölbungen und Ablösungen von Parkettstäben gilt die übermäßige Fugenbildung während der Heizperiode als eine wesentliche Schadensursache. - Dabei können deutlich breitere Fugen auftreten, als die Schwindung des Holzes bei entsprechender Feuchteabnahme erwarten läßt. Als Erklärung bietet sich die plastische Verformung des Holzes an, die während einer vorherigen feuchteren Phase durch Behinderung der Quellung im Parkett verursacht wurde. Obwohl zahlreiche Untersuchungen über die behinderte Quellung des Holzes vorliegen und bereits Keylwerth (1963) darauf hinweist, daß beim Klebeparkett " im Holzbelag größere plastische und kleinere elastische Zusammendrückungen entstehen", wurde der Einfluß der plastischen Verformung auf die Fugenbildung lange vernachlässigt. So geht die Standardarbeit "Fugenbildung im Parkett" (Opitz, Nock 1971) ausschließlich auf die reversiblen Quell- und Schwindbewegungen des Holzes ein. Gressel und von Bar (1995) haben bei Quelldruckmessungen an 22 mm-Parkett aber festgestellt, daß die Deckbreite der Parkettstäbe "um maximal bis zu 2 bis 3 Millimeter" kleiner geworden ist und warnen deshalb vor einer zu niedrigen Verlegefeuchte. In der vorliegenden Arbeit wird der Einfluß der plastischen Verformung auf die Fugenbildung bei 10 mm-Parkett untersucht.
    Keywords Feuchtigkeitsgehalt ; Dichte ; Beschichtung ; Quellung ; Laubholz ; Holzprodukt ; Quercus ; Holzfehler ; Schrumpfung ; Fussboden
    Language German
    Edition v. 51(4) p. 63-66
    Document type Article
    ISSN 0018-3849
    Database ELFIS - Nutrition, agriculture and forestry information system

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