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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 29 (1990), S. 6648-6656 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Biological cybernetics 64 (1991), S. 463-468 
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract It is observed that animals often have to resolve difficult tasks of optimization and that this process can be studied by applying the formal framework of neural networks to a simple problem such as the Travelling Salesman Problem. Existing work is reviewed with particular emphasis on recent studies using “self-organizing networks”. An algorithm is described in which general principles developed by Kohonen are applied to the Travelling Salesman Problem. Simulation results are given for problem sets of up to 10,000 cities. The routes generated are reported as being slightly longer than those produced by simulating annealing; compute time is lower and scales less than quadratically with problem size. It is suggested that the ability to perform optimization is an emergent computational property not just of the Kohonen model but of any mechanism capable of producing topology-preserving mappings, including mechanisms within the brain.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 8085-8097 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The adiabatically adjusting principal-axis hyperspherical (APH) formulation of Pack and Parker for quantum reactive scattering in three dimensions (3D) is used to obtain converged results for the reaction of helium with H+2 (v=1–4) for total angular momentum J=0. The ab initio potential energy surface computed by McLaughlin and Thompson and fitted by Joseph and Sathyamurthy is utilized for the HeH+2 interaction potential. The predicted energy dependence of the accurate 3D state-to-state reaction probabilities show clear evidence for quantum resonances. These resonances are even more numerous than those reported earlier for reduced dimensionality studies of this reaction. The calculated time delays for several of these resonances are found to be over 1 ps. Bending corrected rotating linear model (BCRLM) studies of this same reaction are also reported. These results provide useful insight in sorting out the nature and contribution of the resonances found in the 3D studies.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 595 (1990), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 33 (1990), S. 2368-2375 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Medicine 41 (1990), S. 393-400 
    ISSN: 0066-4219
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 46 (1991), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Accidental cannulation of an extradural vein is a troublesome and potentially serious complication of extradural catheter insertion. This study was conducted to assess the influence of posture, catheter size and the injection of saline before catheter insertion, on its occurrence. Eight different techniques were studied based on combinations of these three factors. There was no difference in incidence with respect to posture. The use of 18-gauge catheters, after injection of 10 ml of 0.9% saline, resulted in a significant (p 〈 0.01) reduction in the incidence of extradural vein cannulation. This technique is recommended in obstetric patients as a means of avoiding accidental intravenous injection of local analgesic.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 30 (1994), S. 0 
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Financial accounting regulatory arrangements adopted in most Western countries often involve the participation of (and interactions between) public-sector and private-sector regulatory agencies. The political process associated with the development of accounting rules not only involves the efforts of interested parties seeking to secure the content of rules favourable to their interests but also the behaviours of regulatory agencies as they compete to influence or control the regulatory ‘agenda’.Regulatory agencies develop their own agendas, in light of their own perceived priorities and the regulatory initiatives of other agencies. The placing of an accounting issue on the agenda of one agency may be warmly supported by other agencies or, alternatively, be viewed as a threat to the regulatory ambitions of those other agencies.This case study reviews the emergence and eventual resolution of an accounting issue that was initially promoted by a government agency in April 1984 but then ultimately developed as a professional accounting standard in December 1991. The study describes the activities of public and private-sector agencies during this eight-year period as they responded to proposals for the introduction of disclosure rules concerning cash flows. Evidence was obtained from public records, documents provided by interest groups, and structured and semi-structured interviews with key participants in the events described.The analysis is underscored by our understanding of competitive regulatory interactions and formal models for analysing agenda entrance (Cobb et al. 1976). This analysis shows how the profession's standard-setting body was unable to control the global agenda for accounting rule-making as a consequence of the intervention of another body, the Australian Stock Exchange.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 30 (1994), S. 0 
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Regulatory arrangements adopted in most Western countries involve the participation of both private-sector (professional) bodies and public-sector agencies in the formulation and administration of accounting rules. The political processes associated with the efforts of interest groups to secure favoured outcomes may involve disputes over regulatory arrangements as well as the content of specific rules.This case study reviews inter-organizational conflict during the 1980s between government regulatory bodies and the accounting profession as they handled proposals for the introduction of disclosure rules concerning related party transactions (RPTs).The case study illustrates how debates about the content and drafting of rules on RPTs took place in a complex organizational setting; how the activities of the profession's standard-setting bodies were hardly consistent with the pluralist ideal; but that when considered in the context of complex interactions between different agencies, the notion of ‘pluralism’ is of limited value when describing the underlying political processes involved in the development of accounting rules; and how simple models of‘corporatism’ failed to describe the dynamics of political processes surrounding particular issues. It is suggested that identifying the ‘domains’ of major participants in the standard-setting process, and analysing threats to these domains, may provide richer descriptions of regulatory processes than have been presented previously.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Abacus 28 (1992), S. 0 
    ISSN: 1467-6281
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Prior to 1930, the upward revaluation of fixed assets was common in the United States. By 1940 the practice was virtually extinct, and for decades thereafter U.S. corporations which were registered with the Securities and Exchange Commission (SEC) have been constrained both from making upward asset revaluations, and from presenting supplementary information about the ‘current values’ of fixed assets. These changes were effected without the publication of any rules or guidelines by either the SEC or the U.S. accounting profession.This paper traces the early history of SEC activities and policies in relation to ‘write-ups’, using primary source materials which include minutes of SEC meetings, internal memoranda prepared by SEC staff, and reports of SEC decisions in stop-order proceedings. These documents show that, initially, SEC staff actively ‘discouraged’ write-ups through the exercise of administrative discretion in the course of assessing whether documents filed with the Commission were adequate to support the registration of prospectuses or securities. Later, formal decisions to reject the use of ‘appraisals’ were based on findings that estimates of current values had been arrived at arbitrarily or capriciously. Over a twenty-five-year period no decisions were located which formally rejected write-ups or the disclosure of current values when they were based on defensible estimates of current market prices. However, subsequently these decisions were cited as precedents for the rejection of the use of both ‘appraisals’ and estimates of market prices as the basis for valuing assets in all financial reports lodged with the SEC. By the 1940s, the SEC was using its registration powers to ‘censor'financial statements which referred to estimates of current values, regardless of the evidence used to arrive at those estimates. By the 1950s, the SEC had extended its policy of censorship to prevent any disclosure of estimates of ‘current values’— even when those disclosures were only made in ‘supplementary’ notes in takeover documents.
    Type of Medium: Electronic Resource
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