ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2336-2338 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have prepared Fe-doped InP epilayers by chemical beam epitaxy using a thermal atomic Fe beam. Epilayers having high resistivities ((approximately-greater-than)107 Ω cm) were obtained over a wide range of Fe concentrations. Resistivities as high as 1.3×108 Ω cm have been obtained. Such resistivity is almost equal to the theoretical value of 1.37×108 Ω cm that we estimate for intrinsic InP. The current-voltage characteristics exhibit both an ohmic and a space-charge-limited regime, and are consistent with the theory of single-carrier injection into a trap-free insulator. Pinning of the Fermi level near midgap by Fe-related deep levels is the mechanism by which the epilayer is made highly resistive. At room temperature, these traps are apparently deep enough that the carrier emission rate is negligible.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 264-266 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The optical absorption coefficient in ultrathin (∼10 A(ring)) hydrogenated amorphous germanium (a-Ge:H) layers deposited on hydrogenated amorphous silicon layers was determined by in situ reflectivity measurements. The decrease in the absorption coefficient in the ultrathin a-Ge:H layers, compared to that of thick films, is explained by an upward shift in the conduction band edge due to quantum confinement of electrons with effective mass of 0.4m0.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5670-5672 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Sputtered Mo-Permalloy thin film is expected to possess great potentiality in soft magnetic properties which can be realized chiefly by controlling sputtering conditions. The effects of sputtering parameters, such as argon pressure, bias voltage, and preheating temperature, on the magnetic properties, of FeNiMo sputtered films have been investigated. The magnetic anisotropy field Hk was found to decrease with the raising preheating temperature while coercivity Hc presented the contrary trend. High effective permeability can be acquired at low argon pressure, adequate preheating temperature, and bias voltage. Close relationships among effective permeability, anisotropy field, magnetostriction coefficient, and half-height width Δθ50 were found. Annealing is available for increasing effective permeability.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1572-9591
    Keywords: blanket ; lithium ; neutronics ; tokamak ; tritium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Lithium Blanket Module (LBM) is an approximately 80×80×80 cm cubic module, representative of a helium-cooled lithium oxide fusion reactor blanket module, that will be installed on the TFTR (Tokamak Fusion Test Reactor) in late 1986. The principal objective of the LBM Program is to perform a series of neutron transport and tritium-breeding measurements throughout the LBM when it is exposed to the TFTR toroidal fusion neutron source, and to compare these data with the predictions of Monte Carlo (MCNP) neutronics codes. The LBM consists of 920 2.5-cm diameter breeder rods constructed of lithium oxide (Li2O) pellets housed in thin-walled stainless steel tubes. Procedures for mass-producing 25,000 Li2O pellets with satisfactory reproducibility were developed using purified Li2O powder, and fabrication of all the breeder rods was completed in early 1985. Tritium assay methods were investigated experimentally using both small lithium metal samples and LBM-type pellets. This work demonstrated that the thermal extraction method will be satisfactory for accurate evaluation of the minute concentrations of tritium expected in the LBM pellets (0.1–1 nCi/g).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Origins of life and evolution of the biospheres 19 (1989), S. 258-259 
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Origins of life and evolution of the biospheres 16 (1986), S. 275-276 
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of optimization theory and applications 62 (1989), S. 449-466 
    ISSN: 1573-2878
    Keywords: Cone concavity ; strong maximal points ; dual problems ; strong saddlepoints ; pseudotangent cones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract LetX,Y andZ be locally convex real topological vector spaces,A⊂X a convex subset, and letC⊂Y,E⊂Z be cones. Letf:X→Z beE-concave andg:X→Y beC-concave functions. We consider a concave programming problem with respect to an abstract cone and its strong dual problem as follows: $$\begin{gathered} (P)maximize f(x), subject to x \in A, g(x) \in C, \hfill \\ (SD)minimize \left\{ {\mathop \cup \limits_{\varphi \in C^ + } \max \{ (f + \varphi \circ g)(A):E\} } \right\}, \hfill \\ \end{gathered} $$ , whereC + denotes the set of all nonnegative continuous linear operators fromY toZ and (SD) is the strong dual problem to (P). In this paper, the authors find a necessary condition of strong saddle point for Problem (P) and establish the strong duality relationships between Problems (P) and (SD).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Investigational new drugs 4 (1986), S. 289-293 
    ISSN: 1573-0646
    Keywords: flavone acetic acid ; cytotoxicity ; colon cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Flavone acetic acid (FAA) was incubated for 1 to 48 hr with 3 established human colon cancer cell lines endowed with distinct degrees of phenotypic properties. All 3 lines responded to FAA in almost identical fashion; when incubated with the drug for only 1 hr, an initial decrease in survival was observed for concentrations of 250 μg/ml but no further increments in cytotoxicity were elicited when the concentration of FAA was augmented. Increasing the length of treatment yielded relatively modest increments (about 1 log) in cell killing only after an interval of 48 hr and only at the highest concentration (1000 μg/ml). Because of these relatively poor cytotoxic effects and because the therapeutic range of FAA is so narrow, we conclude that this agent will not be a valuable contribution to the antitumor arsenal, at least for colon cancer.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2023-01-18
    Description: As the negative impacts of hydrological extremes increase in large parts of the world, a better understanding of the drivers of change in risk and impacts is essential for effective flood and drought risk management and climate adaptation. However, there is a lack of comprehensive, empirical data about the processes, interactions and feedbacks in complex human-water systems leading to flood and drought impacts. To fill this gap, we present an IAHS Panta Rhei benchmark dataset containing socio-hydrological data of paired events, i.e. two floods or two droughts that occurred in the same area (Kreibich et al. 2017, 2019). The contained 45 paired events occurred in 42 different study areas (in three study areas we have data on two paired events), which cover different socioeconomic and hydroclimatic contexts across all continents. The dataset is unique in covering floods and droughts, in the number of cases assessed and in the amount of qualitative and quantitative socio-hydrological data contained. References to the data sources are provided in 2022-002_Kreibich-et-al_Key_data_table.xlsx where possible. Based on templates, we collected detailed, review-style reports describing the event characteristics and processes in the case study areas, as well as various semi-quantitative data, categorised into management, hazard, exposure, vulnerability and impacts. Sources of the data were classified as follows: scientific study (peer-reviewed paper and PhD thesis), report (by governments, administrations, NGOs, research organisations, projects), own analysis by authors, based on a database (e.g. official statistics, monitoring data such as weather, discharge data, etc.), newspaper article, and expert judgement. The campaign to collect the information and data on paired events started at the EGU General Assembly in April 2019 in Vienna and was continued with talks promoting the paired event data collection at various conferences. Communication with the Panta Rhei community and other flood and drought experts identified through snowballing techniques was important. Thus, data on paired events were provided by professionals with excellent local knowledge of the events and risk management practices.
    Language: English
    Type: info:eu-repo/semantics/workingPaper
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    facet.materialart.
    Unknown
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Publication Date: 2023-08-02
    Description: The shock acceleration is an important particle acceleration mechanism in the interplanetary space, but the electron shock acceleration process is not fully understood yet. Here we summarize the observational properties of in situ shock acceleration of solar wind suprathermal electrons at 1 AU, using the Wind measurements and MMS measurements. For both the Earth’ s bow shock and ICME-driven shocks, the observed power-law spectral index of shocked suprathermal electrons is significantly larger than the theoretical prediction of first-order Fermi acceleration, while the flux enhancement ratio between the downstream shocked and upstream unshocked suprathermal electrons peaks near 90° pitch angle. These observations favor the shock drift acceleration process. However, the shocked electron spectra exhibit different behaviors for ICME-driven shocks and terrestrial bow shock. At ICME-driven shocks, the significantly shocked suprathermal electrons generally have a double-power-law spectrum bending upwards at a break near 2keV with a low-energy spectral index of ∼3.7 and high-energy spectral index of ∼2.5, similar to the upstream unshocked suprathermal electrons. At the terrestrial bow shock, the strongly shocked suprathermal electrons show a double-power-law spectrum bending downwards at a break near ∼ 65 keV with a low-energy spectral index of ∼3.1 and high-energy index of ∼7.6, different from the upstream unshocked suprathermal electrons. Furthermore, the observed break energy is comparable to a critical electron energy with its cross-shock gyrodiameter equal to the bow shock’s ramp thickness. These results suggest that the shock drift acceleration process of suprathermal electrons could strongly depend on the electron trapping efficiency at shock.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...