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  • 1
    Electronic Resource
    Electronic Resource
    Measurements of second- and third-order nonlinear polarizabilities for HF and HCl (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 4673-4677 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Measurements of second- and third-order nonlinear polarizabilities (hyperpolarizabilities) for HF and HCl using dc electric-field-induced second-harmonic generation are presented: χ(3)(parallel)(HF)=70(10)×10−39 esu/mol, χ(2)(parallel) (HF)=−4.70(41)×10−32 esu/mol, χ(3)(parallel)(HCl)= 347(15)×10−39 esu/mol, χ(2)(parallel)(HCl)= −4.22(50)×10−32 esu/mol. In the case of HF this allows a critical comparison with theory. HF has fewer electrons than any polar molecule previously studied experimentally and the small size of HF has made it an attractive candidate for theoretical investigation. Christiansen and McCullough have used numerical Hartree–Fock techniques to establish generally accepted criteria for basis set selection; and Bartlett and Purvis have applied to HF the most elaborate technique applied so far to the calculation of any molecular hyperpolarizability (CHF SDQ-MBPT[4]). Experimental corrections and uncertainties are carefully considered as are several other factors relevant to a comparison of these experimental and theoretical data. The theoretical results are about a factor of 2 smaller than the experimental data and none of the factors considered seems to offer a resolution of this discrepancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448726
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  • 2
    Electronic Resource
    Electronic Resource
    AN AGGREGATION PROBLEM (1961)
    Oxford, UK : Blackwell Publishing Ltd
    Metroeconomica 13 (1961), S. 0 
    Details
    ISSN: 1467-999X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-999X.1961.tb00829.x
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  • 3
    Electronic Resource
    Electronic Resource
    Differential Diagnosis between Learning-disabled and Dysphasic Children (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 682 (1993), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1993.tb22990.x
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic Process Modelling of Activated-Sludge Plants (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 12 (1998), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This paper reviews the developments in process modelling, and outlines the benefits of dynamic modelling compared to steady-state modelling. The alternative uses of modelling, for design, operation and training, are included. The models covered are the COD-based models from the IAWQ models #1 and #2 and WRc's BOD-based model. The relevance of BOD modelling for practitioners, rather than academics, is discussed, and likely routes for the future development are presented.The authors’practical experience using these models, principally under WRc's STOAT software, is also presented in the form of case studies - highlighting the experience of sampling programmes, calibration, validation and the continuing importance of the engineer's role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1998.tb00196.x
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  • 5
    Electronic Resource
    Electronic Resource
    ANOMALOUS RESPONSE IN THE HALIFAX PROCESS (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 17 (2003), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The Halifax process was first proposed as a means of minimising the bulking of activated sludge. In one system using this process, bulking continued to occur. An analysis of the process, using dynamic modelling tools, predicted that the process contains the potential for effluent quality to become worse as the hydraulic loading to the process is reduced — contrary to common experience with more conventional layouts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.2003.tb00456.x
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  • 6
    Electronic Resource
    Electronic Resource
    Assessment of strategies for coping with anxiety: Preliminary investigations
    Amsterdam : Elsevier
    Journal of Anxiety Disorders 4 (1990), S. 1-14 
    Details
    ISSN: 0887-6185
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0887-6185(90)90020-A
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  • 7
    Electronic Resource
    Electronic Resource
    SYNTHETIC METHANOL MANUFACTURE (1948)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 40 (1948), S. 2230-2240 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50468a002
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  • 8
    Electronic Resource
    Electronic Resource
    GaAs to InP wafer fusion (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 4227-4237 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper presents an analysis of the various properties of the fused interface between GaAs and InP. Interface dislocations are characterized by transmission electron microscopy. Bipolar electrical properties are studied by electron beam induced current measurements and by electrical measurements of fused diode and laser structures. Absorptive optical losses at the interface are estimated from measurements on fused Fabry–Perot resonators and optical scattering losses from interface roughness are estimated by atomic force microscopy. Finally a preliminary mechanical analysis of fracture patterns of fused mesas is presented. The results from our analysis are used to develop guidelines for the fabrication of fused optoelectronic devices. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359884
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  • 9
    Electronic Resource
    Electronic Resource
    Low threshold, wafer fused long wavelength vertical cavity lasers (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1463-1465 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We demonstrate electrically injected InGaAsP (1.3 μm) vertical cavity lasers (VCLs) fabricated on GaAs substrates and employing GaAs/AlAs mirrors. The technique of wafer fusion allows for integration of GaAs/AlAs mirrors with InP double heterostructures without degradation of device performance, despite a 3.7% lattice mismatch between the wafers. The wafer fused VCLs have the lowest threshold current (9 mA) and lowest threshold current density (9.5 kA/cm2) and the highest characteristic temperature (T0=67 K) reported to date of any room-temperature long wavelength VCL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111913
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  • 10
    Electronic Resource
    Electronic Resource
    Analysis of wafer fusing for 1.3 μm vertical cavity surface emitting lasers (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 62 (1993), S. 2474-2476 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report low densities of electrically active defects and low optical losses at the wafer fused interface between InP and GaAs. Electron beam induced current analysis shows electrically active defects with an average spacing of 4.5 μm at the interface and significantly lower densities 0.4 μm from the fused interface. Optical measurements of a Fabry–Perot resonator made by fusing an InP epilayer to a GaAs/AlAs mirror demonstrate a 3% increase in mirror transmission after fusing and negligible absorption at the fused interface. Based on these results, we present design considerations for fused surface emitting lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.109323
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