Library

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
    Electronic Resource
    Electronic Resource
    Effects of lattice mismatch and thermal annealing on deep traps and interface states in Ga0.92In0.08As(n+)/GaAs(p) heterojunctions (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4362-4366 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of the lattice-mismatch-induced defects on deep level traps in Ga0.92In0.08As(n+)/GaAs(p) heterojunction diodes have been studied by means of various deep level transient spectroscopy techniques and the frequency-dependent capacitance-voltage (C-V-f) characteristics. Three hole traps at 0.58, 0.42, and 0.27 eV were observed. We attribute the 0.42 eV trap to Cu impurity, the 0.58 eV trap to VGa or Fe, and the 0.27 eV trap to a complex associated with the 0.42 and 0.58 eV traps. Depth profiles of these hole traps in the GaAs side were measured in different lattice-mismatched samples. The depth profile data near the interface and from deep inside the bulk show evidence of impurity gettering by the mismatched interface. We also found that the concentrations of these traps were reduced by rapid thermal annealing. A U-shaped energy distribution of the interface states was obtained from the C-V-f measurements. For an in-plane mismatch greater than 0.25%, the interface state density shows no obvious dependence on the in-plane lattice mismatch, while at smaller mismatch the interface state density increases with increasing mismatch. The interface state density was on the order of 1011 cm−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352821
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Interface states in regrown GaAs p-n junctions by selective molecular beam epitaxy (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 297-299 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the first evaluation of interface states present in GaAs p-n junctions regrown on a SiO2 masked substrate by selective molecular beam epitaxy. A constant-capacitance deep-level transient spectroscopy (CC-DLTS) method is extended to the regrown p-n junction case, and a technique to distinguish the DLTS signal emerging from bulk and interface states is employed. The extracted interface state density is in good agreement with predictions based on the unified disorder-induced gap state model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107917
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Deep level capture barrier in molecular beam epitaxial grown AlAsySb1−y measured by isothermal capacitance transient spectroscopy (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 506-508 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Improved isothermal capacitance transient spectroscopy (ICTS), which measures the entire capacitance transient as a function of time and temperature in a single temperature scan, has been implemented in a deep level trap analysis extending the characterization to include capture barrier measurement. This method eliminates inaccuracies introduced by narrow pulse widths that are difficult to reproduce accurately, providing capture barrier information more accurately and easily in addition to the usual deep level characteristics. A method of establishing ICTS experimental conditions and a method of analyzing the resulting data are described and applied to the investigation of deep levels in Te-doped AlAs0.07Sb0.93. The sample shows a single DX center trap having a deep level energy of 278 meV, a high temperature capture cross section of 1.3×10−12 cm2, and a capture barrier energy of 137 meV, clearly demonstrating the superior method of measuring a capture barrier. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119592
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Control of surface states in GaSb/AlxGa1−xAsySb1−y/GaxIn1−xSb/AlxGa1−xAsySb1−y quantum well structures (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2779-2781 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: GaSb-based lasers show advanced capabilities over other material for the far-infrared wavelength range. However, for quantum-well (QW) laser structures of AlxGa1−xAsySb1−y/GaxIn1−xAsySb1−y/AlxGa1−xAsySb1−y grown on GaSb, each component element etches at a different rate, making it difficult to achieve quality surfaces sufficiently free of defects. Thus, in this letter, the effects on the surface quality of GaSb-based laser materials have been studied using phosphoric acid etching, boron trichloride reactive ion etching (RIE), and a postetch sulfur treatment. In addition, the quality of the surface is compared for two barriers of AlAs0.07Sb0.93 and Al0.9Ga0.1As0.07Sb0.93, based on current–voltage measurements as a function of temperature. The best surfaces were produced by RIE and by using as much Ga in the barriers as the device operation allows. A generation center in the Ga0.81In0.19As0.12Sb0.88 was found at 0.14 eV for QW diodes with low surface conduction. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125147
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Standards, Costs and Benefits: An International Perspective (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This paper considers the development of standards for the discharge of wastewaters from the perspectives of (a) the developed world, (b) the developing world, and (c) the newly industrializing nations. It considers the potential environmental benefits which can be obtained by the imposition of stringent effluent standards, and weighs this against the economic costs of meeting such standards. By means of case studies it considers how inappropriate standards can often arise in other countries of the world and how the imposition of unjustifiably high standards can be demoralizing, costly, and produce no environmental improvements. Finally, it considers how a more pragmatic approach to the setting of standards, especially in the newly industrializing and developing nations, place them in context of applicability, affordability, regulation and enforcement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1994.tb01136.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A NEW TECHNIQUE FOR THE ACCURATE AERIAL APPLICATION OF HERBICIDES TO DRAINAGE CHANNELS WITH NEGLIGIBLE SPRAY DRIFT (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 6 (1966), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. Difficulties of access met with in Britain when applying dalapon to emergent water weeds in drainage channels led to work starting in 1964 on the development of a method of accurate aerial application of aqueous solutions of herbicide. The narrow, sinuous nature of the targets and the proximity of susceptible crops made it necessary to minimize spray drift and maintain a constant height and a slow speed. Nozzles designed to give large droplets were tested for droplet size and distribution. Selected nozzles were then tested from a helicopter in the field and the effect of their spray characteristics on the biological performance of dalapon was assessed. No daman occurred as a result of spray drift and satisfactory control of Phragmites communis, Typha angustifolia and T. latifolia was achieved with a lower dose of dalapon in a lower volume of spray than previously considered necessary for ground applications.Une nouvelle technique pour l'application précise d'herbicides par voie aérienne sur les canaux de drainage, avec des risques négligeables d'entrainement
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1966.tb00890.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A Statistical Paradox in Auditing (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 30 (1994), S. 0 
    Details
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The decision rule in a standard form of hypothesis testing in auditing is to reject the null hypothesis (and thus the auditee's account balance) if the 100(1-β)% confidence interval estimate of the population average error lies even partly outside the null (immaterial) interval. The effect of this rule is to fix the minimum power of the test (i.e., the minimum probability of rejecting a materially incorrect balance) at 1-β/2 (assuming a two-sided test). An unseen theoretical deficiency of the stated decision rule is that, from a Bayesian (evidential) rather than long-run error-frequency standpoint, marginal rejection of the null hypothesis supports that hypothesis. Indeed if the sample size is large enough, an account balance which is marginally rejected by the auditor, using a conventional test, has an‘objective’ (independent-of-prior) posterior probability arbitrarily close to one. In these circumstances, any call by the auditor for adjustment of the stated account balance, or additional sampling, would be seen as‘over-servicing’ and rightfully resisted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-6281.1994.tb00341.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Sample Size and the Strength of Evidence: A Bayesian Interpretation of Binomial Tests of the Information Content of Qualified Audit Reports (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 26 (1990), S. 0 
    Details
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Lindley (1957) demonstrated that, from a Bayesian standpoint, a given level of statistical significance P carries less evidence against the null hypothesis Ho the larger (more powerful) the test. Moreover, if the sample is sufficiently large, a result significant on Ho at 5% or lower may represent strong evidence in support of Ho, not against it. Contrary to Lindley's argument, a great many applied researchers, trained exclusively in orthodox statistics, feel intuitively that to‘reject’ the null hypothesis Ho at (say) α= 5% is more convincing evidence, ceteris paribus, against Ho the larger the sample. This is a consistent finding of surveys in empirical psychology. Similarly, in accounting, see the principles for interpreting statistical tests suggested by Burgstahler (1987). In econometrics, ‘Lindley's paradox’ (as it has become known in statistics) has been explained in well known books by Zellner (1971), Leamer (1978) and Judge, Hill, Griffiths, Lutkepohl and Lee (1982), but is not widely appreciated. The objective of this paper is to reiterate the Bayesian argument in an applied context familiar to empirical researchers in accounting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-6281.1990.tb00230.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Replacement Cost Asset Valuation and Regulation of Energy Infrastructure Tariffs (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 39 (2003), S. 0 
    Details
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: In Australia, access tariffs (rental charges) paid by third party users to the owners of energy transmission assets (e.g., gas pipelines) are determined by regulators on the basis of their depreciated optimized replacement cost (known as DORC). Reliance on the replacement cost, rather than actual cost, of existing assets inflates tariffs and incites the criticism that asset owners earn a return on investments of a scale never made. The economic rationale of the regulators’ model is that it emulates the workings of a contestable market, by setting tariffs at a level just short of that required to motivate a new entrant (system duplication). Properly reconstructed, this model constitutes a dynamic and internally consistent theory of replacement cost valuation and depreciation. Its mathematical consequences, however, especially with regard to the valuation of sunk assets with long times to expiry, are shown to be practically and politically unpalatable. In particular, the implied tariff levels for such assets are very close to those that would apply to new infrastructure assets built today at today's prices. Regulators unwilling to accept this implication of a new-entrant-exclusion pricing logic are left with no alternative framework for DORC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1467-6281.00118
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Evaluation of RDDirect: an innovative telephone research advisory service (2004)
    Bradford : Emerald
    Clinical governance 9 (2004), S. 101-109 
    Details
    ISSN: 1477-7274
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Medicine , Economics
    Notes: RDDirect is a novel telephone help line which was established in response to national policy to improve research consciousness and capacity in the NHS. This regionally funded telephone referral service takes research enquiries from aspiring or experienced researchers, which are then "diagnosed" and directed to relevant sources of advice and information. The infrastructure for RDDirect includes a panel of research specialists, a Web site with links to relevant research resources, and a monitoring and follow-up system. The first year has been subject to both internal monitoring and evaluation and an external evaluation. Findings from both approaches show that user satisfaction was high, although uptake was low. Advisors were also satisfied, both with interactions with RDDirect staff and referrals received. The Web site was accessed far more than anticipated. A key area of concern is effective publicity for the service.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14777270410536385
    Library Location Call Number Volume/Issue/Year 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...