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  • 2005-2009  (30,962)
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  • 1
    Monograph available for loan
    Monograph available for loan
    Scaling and uncertainty analysis in ecology : methods and applications (2006)
    Dordrecht : Springer
    Details Availability
    Call number: M 09.0459
    Description / Table of Contents: Contents: 1. Concepts of scale and scaling. 2. Perspectives, methods of scaling. 3. Uncertainty analysis in ecological studies. 4. Multilevel statistical models, ecological scaling. 5. Downscaling abundance from species distribution. 6. Scaling terrestrial biogeochemical processes. 7. A framework, methods for simplifying landscapes. 8. Building up with top-down approach. 9. Carbon fluxes across regions. 10. Landscape and regional scale studies of nitrogen gas fluxes. 11. Multiscale relationships of landscape characteristics and nitrogen concentrations in streams. 12. Uncertainty in scaling nutrient export coefficients. 13. Causes, consequences of land use change in North Carolina Piedmont. 14. Assessing spatial scale influence on relationship between avian nesting success and forest fragmentation. 15. Scaling issues in mapping riparian zones. 16. Scale issues in lake-watershed interaction. 17. Scaling, uncertainty in region-wide water quality decision-making. 18. Scaling with known uncertainty.
    Type of Medium: Monograph available for loan
    Pages: xviii, 351 S. , graph. Darst., Kt.
    ISBN: 1402046642 , 978-1-402-04664-3
    Classification:
    Ecology
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Climate change and water (2008)
    Geneva : IPCC Secretariat
    Associated volumes
    Details Availability
    Call number: PIK N 076-12-0067
    In: IPCC Technical Paper
    Description / Table of Contents: Contents: Executive Summary ; 1 Introduction to climate change and water ; 2 Observed and projected changes in climate as they relate to water ; 3 Linking climate change and water resources: impacts and responses ; 4 Climate change and water resources in systems and sectors ; 5 Analyzing regional aspects of climate change and water resources ; 6 Climate change mitigation measures and water ; 7 Implications for policy and sustainable development ; 8 Gaps in knowledge and suggestions for further work
    Type of Medium: Monograph available for loan
    Pages: VIII, 200 S. : Ill, graph. Darst., Kt.
    ISBN: 9789291691234
    Series Statement: IPCC Technical Paper 6
    URL: http://ipcc.ch/pdf/technical-papers/climate-change-water-en.pdf
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 3
    Electronic Resource
    Electronic Resource
    Swc2 is a widely conserved H2AZ-binding module essential for ATP-dependent histone exchange (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 1064-1071 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The histone variant H2AZ is incorporated preferentially at specific locations in chromatin to modulate chromosome functions. In Saccharomyces cerevisiae, deposition of histone H2AZ is mediated by the multiprotein SWR1 complex, which catalyzes ATP-dependent exchange of nucleosomal histone H2A for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb1023
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  • 4
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    A single-station spectral model of the monthly median foF2 over Chongqing, China (2009)
    Details
    Publication Date: 2019-11-04
    Description: Hourly values of the critical frequency of the ionospheric F region, foF2, obtained at Chongqing ionospheric observatory (geographic 29.50N, 106.40E), China, during the interval of 1977 to 1997 (solar cycle 21 and 22) have been used to investigate the dependence of the monthly median foF2 on solar activity and geomagnetic activity, and to construct single-station model (SSM) using Fourier expansion. The results of the present analysis show that there is a significant nonlinear relationship between monthly median foF2 and sunspot number R especially at daytime in each month and nighttime in summer. Furthermore, introducing geomagnetic index Ap further improves the description of variation of monthly median foF2, and the standard deviations decrease also dependently on time and month. Thus the complex influence of solar activity and geomagnetic activity may be approximately expressed by a general multiple nonlinear function at Chongqing station, China. The basic aim of this paper is to show that considering the nonlinear influence both of solar activity and geomagnetic activity improves the monthly median model. The SSM is in good agreement with observations, with standard deviation 0.65MHz, while IRI model has a lower accuracy with standard deviation 0.96MHz.
    Description: JCR Journal
    Description: open
    Keywords: solar cycle variation ; single station model ; geomagnetic index ; monthly median foF2 ; 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Spinel-Type Nanocrystalline ZnFe〈sub〉2〈/sub〉O〈sub〉4〈/sub〉 by Radiation Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 327-330 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: A new electron beam radiation method was developed to prepare spinel-type nanocrystallineZnFe2O4 at room temperature and ambient pressure, without any kind of catalysts. The structure,morphology and size were characterized by X-ray diffraction (XRD) and transmission electronmicroscopy (TEM), infrared spectroscopy (IR). The obtained Nanocrystalline ZnFe2O4 particleshave Spinel structure, spherical shape morphology and a mean particle size distribution of 20 and40 nm
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.327.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Development of Non-Dendritic Microstructure of Aluminum Alloy in Semi-Solid State under Ultrasonic Vibration (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 451-456 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The effect of processing parameters on the semi-solid microstructure has beeninvestigated in the course of semi-solid slurry preparation of A356 Al alloy by ultrasonic vibrationmethod. The A356 melt in temperature of 630660°C was poured into a special metal cup, andexposed to ultrasonic vibration at 20 kHz or isothermal holding for a certain time after vibration.The results show that the semi-solid slurry with primary α-Al crystals smaller than 90 μm and anaverage shape coefficient F S (SF was defined as SF4 A/L2P) above 0.5 could be prepared byultrasonic vibration for a time less than 144 s. In the isothermal holding period after a short time ofultrasonic vibration, the average particle diameter increased with the increase of holding time, butF S decreased at first, and then increased a little. It was discovered that ultrasonic vibration is a goodmethod to prepare semi-solid slurry with fine and relatively round primary crystals due to cavitationand acoustic streaming effects
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.451.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of Semi-Solid Slurry of Hypereutectic Al-Si Alloy by Ultrasonic Vibration (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 767-771 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The preparation of semi-solid slurry of hypereutectic Al-Si alloy by Ultrasonic Vibration(USV) has been studied. The A390 alloy melt was poured into a preheated metal cup, andsubsequently the ultrasonic vibrator was dipped into the melt and USV was imposed. The solidifiedmicrostructure of the slurry has been analyzed, and the mechanical properties of the alloy have beentested by making samples through diecasting of the slurry. The results show that the primary Siparticles of A390 alloy became finer, rounder and uniformly distributed in microstructure of A390alloy slurry if imposed with USV, and average diameter of primary Si particles was about 20μm. WithUSV, the ultimate tensile strength and the hardness of rheo-casted samples increased by over 25% andnear 50% respectively besides the elongation rose by above 100%. After heat treatment, themechanical properties were further improved. In addition, the mechanism of preparation of semi-solidslurry of hypereutectic Al-Si alloy by USV is discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.767.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Bridgman Growth of a Novel Piezoelectric Single-Crystal Material: Ca〈sub〉3〈/sub〉NbGa〈sub〉3〈/sub〉Si〈sub〉2〈/sub〉O〈sub〉14〈/sub〉 (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 217-219 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Langasite (La3Ga5SiO14, LGS) and its isomorphs, were regarded as potential substratematerials for surface acoustic wave (SAW) and bulk acoustic wave (BAW) applications. Among thesehomologous compounds, the ordered structure crystals have attracted much attention for their low Ga2O3content, high acoustic velocity and low acoustic loss. In this work, the ordered langasite structure crystalsCa3NbGa3Si2O14 (CNGS) were grown with vertical Bridgman method for the first time. The CNGScrystals with 25mm in diameter and 40mm in length were grown successfully from its stoichiometric meltthrough LGS crystal of Ø10mm×40mm being chosen as seed. X-ray powder diffraction experimentsshowed that the CNGS single crystals had a single phase and had the same structure as the LGS crystal.The transmittance spectra with the wavelength from 200 to 800nm were recorded by means ofSpectrophotometer at room temperature
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.217.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Regular Fracture Control of Pressed Notch Bar under Three-Point Bending (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 61-66 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new method for fabricating crack is introduced by pressing the wedge on bar. The pathof the crack propagation is not regular when the ratio of length and diameter is less than 1.8 on thesymmetrical support. The load of the wedge for pressing the notch is given in this paper. The 2-Dfinite element is applied to simulate the crack propagation by the maximum normal stress theory.The experimental results show that the quality of the fracture section will vary with the span on thethree-point bending. In order to control the crack propagation along the desired section regularly,the asymmetrical three-point bending is proposed. The simulation results show that when thedifference of the two spans is between 11 and 22 in asymmetrical three-point bending under theparameters condition, the good quality of the section will be obtained, and the experimental resultsalso strong support the conclusion
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.61.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    (Ca,Sr,Ba)TiO〈sub〉3〈/sub〉-Based Dielectrics Sintered in Reducing Atmosphere (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 114-117 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The anti-reducing sintering of (Ca,Sr,Ba)TiO3-based dielectrics was achieved by the cooperatingeffect of Mn2+, Ca2+, Mg2+, Dy3+ and Yb3+. A small quantity of Zr4+ partly substitution for Ti4+ canimprove the temperature dependence of dielectric constant. But ZrO2 will also reduce the solid solubilityof BaTiO3-SrTiO3-CaTiO3 ternary system, and may cause phase separation. The separated ferroelectricphase increases the capacitance change under DC bias. Non-reducible (Ca,Sr,Ba)(Ti,Zr)O3-based dielectricswith single orthorhombic phase of perovskite structure was obtained. The dielectric and DC biasproperties are: .C/C (DC bias: 1.5kV/mm) 〈0.05%, ε =250~300, tgδ 〈 0.5%
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.114.pdf
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