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  • 2005-2009  (2)
  • 2000-2004  (18)
  • 1990-1994  (46)
  • 1965-1969  (24)
  • 1915-1919  (1)
  • 1910-1914  (3)
  • 1
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Analytical chemistry 65 (1993), S. 2472-2477 
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 32 (1991), S. 753-761 
    ISSN: 1089-7658
    Quelle: AIP Digital Archive
    Thema: Mathematik , Physik
    Notizen: The equations for Chern–Simons–Higgs and Abelian Higgs vortices are reformulated in a certain form of background metric. Painlevé analysis is applied to determine integrability of the equations, and explicit solutions for cylindrically symmetric Chern–Simons–Higgs vortices are found for a specific choice of the metric.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 2310-2315 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Hole drift mobilities have been measured using photocarrier time-of-flight for several hydrogenated amorphous silicon-carbon alloy specimens. We find that, as the band gap increases, the hole drift mobility remains essentially constant. The temperature and dispersion properties were broadly consistent with hole multiple trapping in the valence bandtail. In conjunction with previous drift mobility measurements in hydrogenated amorphous silicon-carbon alloys and hydrogenated amorphous silicon-germanium alloys, these hole measurements complete a simple pattern for the effects of band gap modification on drift mobilities: electron mobilities decline as the band gap is increased or decreased from 1.75 eV, but hole mobilities are relatively unaffected.
    Materialart: Digitale Medien
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  • 4
    ISSN: 1520-5851
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Energietechnik
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd.
    Review of international economics 9 (2001), S. 0 
    ISSN: 1467-9396
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: Owing to their low bargaining power and high negotiation costs, microstates face severe disadvantages when dealing with the outside world. Forming a group with neighboring nations might be an effective instrument to address this problem. This paper presents a model in which the decision to form, expand or join a regional club is based on negotiation costs and bargaining power rather than on the traditional costs and benefits of trade integration. The model is used to determine the optimal and the equilibrium group size under various entry conditions. The welfare implications of the entry conditions are also examined.
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    The @world economy 27 (2004), S. 0 
    ISSN: 1467-9701
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Rechtswissenschaft , Wirtschaftswissenschaften
    Notizen: This paper draws on Hinkle and Schiff (2003). It analyses the planned Economic Partnership Agreements (EPAs) between the EU and Sub-Saharan Africa (SSA) from a development perspective. It does not take a position on whether SSA should enter into EPAs with the EU. Rather, it starts from the notion that the process of forming EPAs is unlikely to be reversed and examines the conditions that will maximise SSA's benefits from the EPAs. If this notion is correct, then the analysis presented in the paper applies. On the other hand, Pascal Lamy, the EU Trade Commissioner, made a proposal at the May 2004 G-90 summit in Dakar that might lead to a change in the EPA process. He proposed that the G-90, a group consisting of ACP and non-ACP LDC countries, should not have to make concessions at the WTO Doha Round of multilateral trade negotiations, i.e., he proposed a ‘free round’ for the G-90. This proposal opens the door to the possibility that the same might apply to the ACP countries in the EU-ACP negotiations and that the EPA process might be reversed. The paper considers the key issues raised by the planned EPAs, their relationship to the WTO's Doha Round and the EU's Everything-but-Arms Initiative, the changes needed to make the EPAs internally consistent, the domestic reforms in SSA that would need to accompany trade liberalisation in both goods and services, and the potential effects of the EPAs on regional integration in SSA. The EPAs will pose a number of policy challenges for SSA countries, including: restructuring of indirect tax systems, reduction of MFN tariffs, liberalisation of service imports on an MFN basis and related regulatory reforms in the services sector, and liberalisation of trade in both goods and services within the regional trading blocs in SSA. The paper also finds that the EPAs provide an opportunity to accelerate regional and global trade integration in SSA. To realise the potential development benefits of the planned EPAs, two steps are essential. First, the EU must, as it has stated, truly treat the EPAs as instruments of development, subordinating its commercial interests in the agreements to the development needs of SSA. Second, the SSA countries need to implement a number of EPA-related trade policy reforms. However, the latter is far from certain, given the lack of reform momentum in SSA.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 2791-2793 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We measured the effects of light soaking on the electron drift mobility for three specimens of hydrogenated amorphous silicon (a-Si:H) from different laboratories. The temperature range 130–300 K was studied. The measurements in all cases reveal two temporal regimes: an early time regime associated with bandtail transport, and a later-time regime associated with deep trapping of the electrons. We found no evidence for effects of light soaking on the bandtail regime within a reproducibility error of 20%. Deep trapping was significantly affected by light soaking, in agreement with extensive prior measurements.
    Materialart: Digitale Medien
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  • 8
    ISSN: 1520-6025
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 685-687 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We present intensity-modulated photocurrent and infrared transmittance measurements on dye-sensitized solar cells based on a mesoporous titania (TiO2) matrix immersed in an iodine-based electrolyte. Under short-circuit conditions, we show that an elementary analysis accurately relates the two measurements. Under open-circuit conditions, infrared transmittance, and photovoltage measurements yield information on the characteristic depth at which electrons recombine with ions (the "locus of recombination"). For one particular series of samples recombination occurred near the substrate supporting the titania film, as opposed to homogeneously throughout the film. © 2002 American Institute of Physics.
    Materialart: Digitale Medien
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  • 10
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1924-1926 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We report electromodulated reflectance spectra in n-i-p solar cells with hydrogenated amorphous silicon–germanium alloy absorber layers. At lower photon energies the spectra are determined by bulk electroabsorption, and exhibit peaks near the optical gap of the absorber layers. Voltage scaling of the electroabsorption spectra indicate a built-in potential of Vbi=1.17 V in cells with absorber layer band gaps of 1.50 eV; in conjunction with earlier work, this value argues against a systematic decline in Vbi with an absorber layer band gap. At higher photon energies the spectra are due to direct electroreflectance; the voltage scaling was consistent with model predictions for the electric field at the interface of the p-type and absorber layers. © 2001 American Institute of Physics.
    Materialart: Digitale Medien
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