ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Forest Hydrology and Watershed (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-12-20
    Description: Hydrological processes in forested watersheds are influenced by environmental, physiological, and biometric factors such as precipitation, radiation, temperature, species type, leaf area, and extent and structure of forest ecosystems. Over the past two centuries, forest coverage and forest structures have been impacted globally by anthropogenic activities, for example, forest harvesting, and conversion of forested landscapes for plantations and urbanization. In addition, since the industrial revolution, climate change has resulted in profound impacts on forest ecosystems due to higher carbon dioxide (CO2) concentration or CO2 fertilization, warmer temperatures, changes in frequency and intensity of extreme weather events and natural disturbances. As a result, hydrological processes in forested watersheds have been altered by these natural and anthropogenic factors and these changes are expected to accelerate due to future changing climatic conditions.
    Keywords: Q1-390 ; East Asia ; climate variability ; metals ; woody litter ; extreme weather events ; frequency analysis ; relative contribution ; streamflow variability ; probability distribution ; trace metal ; climate change ; annual streamflow ; hydroclimatology ; forest disturbances ; river discharge ; climate warming ; Weihe River ; non-woody litter ; riparian forest ; low flow ; Central Asia ; canopy filtering ; flood ; SWAT ; Chu River ; annual water yield ; forest hydrology ; throughfall ; flow regimes ; Schrenk spruce (Picea schrenkiana Fisch. et Mey.) ; tree rings ; forest floor ; reforestation ; land-use change ; low flows ; watershed management ; high flow ; forest disturbance ; subalpine forest ; gap-edge canopy ; human activities ; boreal forest ; Tianshan Mountains ; closed canopy ; groundwater level ; fruit tree planting ; hydrological model ; high flows ; cumulative effects ; reconstruction ; headwater stream ; partial least squares (PLS) regression ; streamflow ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general
    Language: English
    Format: application/octet-stream
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    Measurements of x-ray emission from photoabsorption-edge transition radiation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 4300-4307 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article describes the measurements of x-ray power, spatial, and spectral distributions from transition radiators whose spectra are narrowed by the foil material's K-shell photoabsorption edge. We used two foil stacks, one composed of 10 foils of 2-μm-thick titanium and the other composed of 18 foils of 2-μm-thick copper. The x-ray flux produced by a foil stack was compared with the flux produced by a single foil of equivalent thickness. The Ross-filter technique was used for measuring the magnitude of the flux within specific energy bands, 1.56–4.96 keV, and 4.96–9.66 keV. The maximum flux from the titanium radiator was 4.8 mW. The maximum flux from the copper radiator was 3.6 mW. In addition both the flux distribution as a function of photon energy and the spatial flux distribution of the titanium radiator were measured. The x-ray emission was measured by pulse height analysis to be between 3.8 and 6 keV. The spatial measurements showed the x rays to be emitted in an annular cone with angular divergence of approximately 5 mrad. These measurements compared well with calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352192
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Strain tolerance of doctor-blade-processed Bi2Sr2Ca1Cu2O8−δ tapes (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6966-6969 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The strain tolerance of doctor blade tapes of the high-temperature superconductor Bi2Sr2Ca1Cu2O8−δ have been studied to determine the suitability of these materials for magnet conductors. Critical currents that are on the order of 150 000 A/cm2 in zero magnetic field fall by about 30% with 0.1% bending strain and by a factor of 6 with 0.2% bending strain. At 20 T, critical currents fall with strain by approximately the same factor as at 4.2 K, but the critical currents fall with field somewhat faster. These bending strain results have a character quite different from Nb3Sn bronze process material in that there is essentially no prestress from the Cu jacket and there seems to be only a very small reversible range where the sample is within the elastic limit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349824
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Measurements of x-ray emission from zinc and molybdenum transition radiators (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5152-5157 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article describes the measurements of x-ray power, spatial and spectral distributions from transition radiators whose spectra are narrowed by the foil material's K-shell photoabsorption edge. We used two foil stacks, one composed of 15 foils of 3-μm-thick Zn and the other composed of 15 foils of 4-μm-thick Mo. At low average currents, the x-ray spectrum produced by transition radiation was measured by pulse height analysis to be between 5 and 9.7 keV for the Zn radiator and between 10 and 20.0 keV for the Mo radiator. These measurements compared well with calculations. The x-ray spatial distribution from the Zn radiator was measured using a silicon linear diode array. The x rays generated by the Zn radiator were found to be emitted in a forward-directed cone with half angle of ∼1.9 mrad with the center of the expected annulus filled. The power density in the peak of the annulus was found to be 50 mW/(mA cm2). At a high average electron-beam current of 12.5 μA, the x-ray power produced by a stack of ten Zn foils was measured in the spectral range between 5 and 9.66 keV to be 1.54 mW with the peak power in the 1 μs macropulse to be 8.5 W. Electron-beam energies between 249 and 282 MeV were used in these experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353790
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A new model of magnetostrictive "jumps'' in twinned Terfenol-D (abstract) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6179-6179 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new three dimensional model is set up for interpreting the magnetostrictive "jumps'' in Terfenol-D compressed along the [112¯] or magnetically heat treated perpendicular to the [112¯]. This model considers the combined effects of magnetic anisotropy, stress, and magnetic field. It assumes no domain interaction and separates the magnetizing process of such Terfenol into three steps: (a) 180° domain wall movements at low applied H; (b) three dimensional domain rotations at high H; (c) non-180° domain wall movements at higher H. The magnetostrictions along the three orthogonal directions of [111], [112¯], and [11¯0] in Terfenol Tb0.3Dy0.7Fe1.9 compressed along the [112¯] are calculated. The ratios of these to the saturated [111] magnetostriction of single crystalline Terfenol are 0, 0, 0 at the end of (a); −4/3, 5/6, 1/2 at the end of (b); −4/3, 4/3, 0 at the near end of (c), respectively. These data are consistent with our measurements and others.1
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352689
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Strain tolerance of Bi2Sr2Ca1Cu2O8−δ/Ag composites at high field (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 4392-4397 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Strain tolerance of Bi2Sr2Ca1Cu2O8−δ/Ag composites have been studied at fields up to 20 T and bending strains up to 2.6% in order to determine the factors that control the critical current density. The goal is to find the best way to distribute Ag such as to give both high strain tolerance and high critical current density. Partial melt processed samples prepared from micromilled mixtures containing 30% Ag by volume show a gradually decreasing critical current all the way out to 2.6% strain. Samples typically show about 1000 A/cm2 at 4.2 K, 20 T, and 0.75% strain. At 20 K, these values occur at 4 T and 0.75% strain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349121
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Nonlinear behavior of magnetic surface waves on the interface between ferromagnet and antiferromagnet (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 1908-1913 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article the nonlinear frequency characteristics of the transverse magnetic surface waves at microwave frequencies on the interface between a ferromagnet and an antiferromagnet have been studied. The results show that the magnetic surface waves have passband(s) and stopband(s), which are interchangeable through the variation of the wave power. It is shown that the nonlinear surface waves excited on the interface can be backward surface waves with group velocities opposite to their phase velocities in direction. The passband widths of the forward surface waves are about five times larger than those of the backward surface waves in the situation. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372111
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Single photon avalanche diode for single molecule detection (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1524-1529 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A commercially available single photon avalanche photodiode in a passively quenched circuit is used with time-correlated single photon counting modules to achieve subnanosecond time response together with high quantum efficiency and low dark noise. These characteristics are required for experiments in single molecule detection and spectroscopy in which time-gated detection schemes are used. By tightly focusing the input light onto the active area, a quantum efficiency of over 50% and a single photon timing jitter of 168 ps full width at half-maximum are achieved. In addition, the full width at one-hundredth maximum, which is of greater importance for time gating, is 790 ps, comparable to that from a microchannel plate photomultiplier. Measurements of the detector dead time, and the quantum efficiency, dark counts, time response, and pulse height distribution for different operating conditions are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144463
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Observation of the focusing of x-ray transition radiation using cylindrical optics (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1019-1021 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the profile of x rays generated by a transition radiator and focused by simple cylindrical optics. Soft x rays with photon energies between 1 and 4 keV were generated by a 93-MeV electron beam striking a stack of eight foils of 3.5-μm-thick mylar. These x rays were emitted in an annular cone and were collected by a quartz cylinder which focused the x rays to a 0.5-mm-diam spot at a distance of 1.35 m from the transition radiator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107702
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Effect of axial strain on the critical current of Ag-sheathed Bi-based superconductors in magnetic fields up to 25 T (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 858-860 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The irreversible strain limit εirrev for the onset of permanent axial strain damage to Ag-sheathed Bi2Sr2Ca1Cu2O8+x and Bi2Sr2Ca2Cu3O10+x superconductors has been measured to be in the range of 0.2%–0.35%. This strain damage onset is about an order of magnitude higher than for bulk sintered Y-, Bi-, or Tl-based superconductors and is approaching practical values for magnet design. The measurements show that the value of εirrev is not dependent on magnetic field, nor does the critical current depend on strain below εirrev at least up to 25 T at 4.2 K. Both of these factors indicate that the observed strain effect in Ag-sheathed Bi-based superconductors is not intrinsic to the superconductor material. Rather, the effect is extrinsic and arises from superconductor fracture. Thus, the damage onset is amenable to further enhancement. Indeed, the data suggest that subdividing the superconductor into fine filaments or adding Ag to the superconductor powder prior to processing significantly enhances the damage threshold εirrev to above 0.6%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107768
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...