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  • Polymer and Materials Science  (3)
  • Relativistic Nuclear Collisions
  • offshore
  • onshore
  • 1
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    Measurement of the total cross section of uranium-uranium collisions at sNN=192.8 GeV (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-01-24
    Description: Author(s): W. Fischer, A. J. Baltz, M. Blaskiewicz, D. Gassner, K. A. Drees, Y. Luo, M. Minty, P. Thieberger, M. Wilinski, and I. A. Pshenichnov Heavy ion cross sections totaling several hundred barns have been calculated previously for the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). These total cross sections are more than an order of magnitude larger than the geometric ion-ion cross sections primarily due to... [Phys. Rev. C 89, 014906] Published Thu Jan 23, 2014
    Keywords: Relativistic Nuclear Collisions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    LISPWAL: Lithospheric structure of the Namibian continental passive margin at the intersection with the Walvis Ridge from amphibious seismic investigations November 2010 – January 2011, Namibia - Datasets (2014)
    Deutsches GeoForschungsZentrum GFZ
    Details
    Publication Date: 2022-11-29
    Description: Abstract
    Description: Seismic Data, including raw, MSEED and SEG-Y files, of the large-scale controlled-source survey in Northern Namibia (Kaokoveld) using combined on- and offshore experiments. Passive continental margins offer the unique opportunity to study the processes involved in continental extension and break up as well as the role of hot-spot related magmatism. We conducted combined on- and offshore seismic experiments in Northern Namibia designed to characterize the Southern African passive margin at the interaction with the Walvis Ridge, to assess the interaction of the presumed plume with continental lithosphere and to determine the deep structure of the transition from the coastal fold belt to the stable craton, where the Walvis Ridge hits the African continent. The seismic project integrated three experiments, an onshore, coast-parallel refraction seismic profile, two onshore-offshore wide-angle seismic transects, and a combined on- and offshore seismic experiment to image the sub-Moho velocity (Pn tomography) at the ocean-continent transition. The knowledge of the lithospheric structure of the margin together with results from other geoscientific studies (e.g., conducted within the SPP- SAMPLE, DFG Priority Program 1375, South Atlantic Margin Processes and Links with onshore Evolution) will help to address fundamental questions such as, how continental crust and plume head interact, what the extent and volumes of magmatic underplating is, and how and which inherited (continental) structures might have been involved and utilized in the break-up process. Between November 2010 and January 2011, we conducted an extensive seismic experiment in Northern Namiba, in the Kaokoveld. Along 3 seismic lines with a total length of more than 900 km, we deployed 200 seismic sensors and data loggers. The average spacing of the instruments was ~3 km along the coast-parallel line and ~6 km along the other lines, running NE- SW and SE-NW. The data loggers had been equipped with a short-period seismic sensor, recording the vertical ground motion and a battery pack, suitable for continuous data recording of 〉6 weeks. The instruments were placed in shallow holes and covered by sand, leaving the logger surface clear for GPS reception. At the eastern ends of the lines, the instruments were deployed in somewhat hidden places to avoid instrument damage or theft.
    Description: Other
    Description: The Geophysical Instrument Pool Potsdam (GIPP) provides field instruments for (temporary) seismological studies (both controlled source and earthquake seismology) and for magnetotelluric (electromagnetic) experiments. The GIPP is operated by the GFZ German Research Centre for Geosciences. The instrument facility is open for academic use. Instrument applications are evaluated and ranked by an external steering board. See Haberland and Ritter (2016) and https://www.gfz-potsdam.de/gipp for more information.
    Keywords: LISPWAL ; geophysics ; controlled-source seismic survey ; onshore ; offshore ; continental margin ; Namibia ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Profilers/Sounders 〉 SEISMIC REFLECTION PROFILERS
    Type: Dataset , Dataset
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    DATA GFZ
  • 3
    Electronic Resource
    Electronic Resource
    Durch veränderliche Betriebslasten in Kerben erzeugte Eigenspannungen und ihre Bedeutung für die Anwendbarkeit der linearen Schadensakkumulations-HypotheseBericht aus dem Laboratorium für Betriebsfestigkeit (LBF), Gemeinnütziges Forschungsinstitut der Fraunhofer-Gesellschaft, dem die Autoren angehören (1975)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 6 (1975), S. 194-205 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Residual Stresses Due to Variable Service Loads and Their Importance Regarding the Applicability of the Linear Damage Accumulation Hypothesis.The linear damage accumulation hypothesis often provides unreliable life estimations. To improve its application, residual stresses at the notch root of open hole specimens (Kt = 2,5) of the aluminium alloys AlCuMg 2 (US equivalent 2024 T 3) and AlZnMgCuAg (US equivalent 7075 T 6) were continuously measured during the macro-crack-free life range. Based on the residual stress history a corrected hypothesis was applied.
    Notes: Die lineare Schadensakkumulations-Hypothese liefert häufig sehr ungenaue Schätzwerte der Lebensdauer. Um zu einer Klärung beizutragen, wurden an gelochten Stäben, Formzahl ak = 2,5, aus den Leichtmetallegierungen AlCuMg 2 und AlZnMgCuAg im Kerbgrund während des ersten von Makrorissen freien Lebensdauerabschnittes die Eigenspannungen gemessen und darauf aufbauend eine bezüglich der Eigenspannungen korrigierte Hypothese angewendet.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19750060604
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Bedeutung der Unregelmäßigkeit Gauß'scher Zufallsfolgen für die BetriebsfestigkeitÜberarbeitete Fassung der FB-124 (1976) (32) (1978)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 9 (1978), S. 246-256 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Significance of Irregularity of Gaussian Random Sequences on Random FatigueThe results of investigations concerning the influence of the irregularity factor which are found in the literature are often contradicting. The cause may be, that with the variation of the irregularity factor in some cases other influencing parameters were unintentionally varied too. To help clarify the situation a test program was conducted. Notched specimen and single shear lap joints of the aluminium alloy 2024 were tested under axial random loading sequences to determine the influence of irregularity on fatigue life. The irregularity factors (l = 0,99, 0,7, 0,3) cover the range interesting in practice. The method to generate random sequences ensures that the factor of irregularity is the only variate among the usual parameters of the random sequence.
    Notes: Die zum Teil widersprüchlichen Angaben im Schrifttum über den Einfluß des Unregelmäßigkeitsfaktors sind vermutlich darauf zurückzuführen, daß bei einschlägigen Untersuchungen neben dem Unregelmäßigkeitsfaktor auch noch andere Parameter unbeabsichtigt variiert wurden. Um zu einer Klärung beizutragen, wurden unter Zufallsfolgen von Axiallasten mit Merkmalen eines stationären Gaußprozesses Betriebsfestigkeits- Versuche an einem Kerbstab und an einer einschnittigen Fügung aus der Legierung AlCuMg2 durchgeführt und der Einfluß der Unregelmäßigkeit auf die Lebensdauer bestimmt. Die untersuchten Unregelmäßigkeitsfaktoren überdecken mit l = 0,99,0,7 und 0,3 den für die Betriebsfestigkeit interessanten Anwendungsbereich. Das gewählte Verfahren zur Generierung der Zufallsfolgen gewährleistet, daß der Unregelmäßigkeitsfaktor die einzige Variable unter den üblichen Parametern der Zufallsfolge bleibt.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19780090706
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Some properties of poly(3-hydroxybutyrate)-poly(3-hydroxyvalerate) blends (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 39 (1996), S. 215-219 
    Details
    ISSN: 0959-8103
    Keywords: poly-3-hydroxybutyrate (PHB) ; poly-3-hydroxyvalerate (PHV) ; biodegradable polymers ; polymer blends ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The melting, crystallization and dynamic mechanical behaviour of blends of bacterially produced poly[D(-)-3-hydroxybutyrate] (PHB) and poly[D(-)-3-hydroxyvalerate] (PHV) have been investigated. Results showed that melt-pressed PHB-PHV blends contained phase-separated domains in the melt which subsequently crystallized as PHB and PHV type spherulites respectively. The two melting regions detected by DTA related to separate melting of PHB and PHV crystallites, which were almost unaffected by the blend composition. The mechanical behaviour of a random copolymer of PHB/HV was compared with that of a blend of almost the same composition, and found to be markedly different.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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