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  • Numerical Analysis  (2)
  • Action  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    AI & society 9 (1995), S. 258-272 
    ISSN: 1435-5655
    Keywords: Action ; Design ; Discourse ; Innovation ; Language ; Methodology ; Tacit knowledge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This contribution to design methodology reflects upon the barriers to effectiveness imposed by our tendency to gravitate towards the over-formal in human affairs. We see a correspondingly cleaned-up description of the process of design, a failure to consider its jagged elements and to take proper account of the non-formal in knowledge (e.g. tacit knowledge) and communication. Discipline in methodology is accordingly wrongly equated with formality. The failure of design to be effective is more likely for innovative design rather than routine design. It is suggested by way of explanation that design methodology especially in the field of information technology is infused with the ghost of positivism, manifest in an unconditional belief in the value of rationality and an implied naive realist conviction about the fixed, singular and transparent nature of the environment for which design is undertaken. We need to be able to work with uncertainty rather than try for its entire elimination. A breadth of approach in carrying out the activity of design is threatened by lack of attention to the variety of forms which knowledge and corresponding forms of discourse can take. We undertake the disciplined reduction from the messy real work to metaphors tidy enough to work with, or models as they are usually misnamed. The notion of “language of struggle” is invoked as a suitable metaphor for the non-formal discourse particularly relevant to innovative design. A complementary exploration is offered of socio-linguistic space which is the common context for design. In view of the concern with social space necessary to effective design, it may be enlightening to consider the designer as applied anthropologist.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-07-13
    Description: Coalescing supermassive black holes are expected to provide the strongest sources for gravitational radiation detected by LISA. Recent advances in numerical relativity provide a detailed description of the waveforms of such signals. We present a preliminary study of LISA's sensitivity to waveform parameters using a hybrid numerical/analytic waveform describing the coalescence of two equal-mass, nonspinning black holes. The Synthetic LISA software package is used to simulate the instrument response and the Fisher information matrix method is used to estimate errors in the waveform parameters. Initial results indicate that inclusion of the merger signal can significantly improve the precision of some parameter estimates. For example, the median parameter errors for an ensemble of systems with total redshifted mass of 10(exp 6) deg M solar mass at a redshift of z is approximately 1 were found to decrease by a factor of slightly more than two when the merger was included.
    Keywords: Numerical Analysis
    Type: 7th International LISA Symposium/Space Sciences Institute of California (IEEC); Jun 16, 2008 - Jun 20, 2008; Barcelona; Spain
    Format: application/pdf
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  • 3
    Publication Date: 2019-07-13
    Description: Results: Developed parameter estimation model integrating complete waveforms and improved instrumental models. Initial results for equal-mass non-spinning systems indicate moderate improvement in most parameters, significant improvement in some Near-term improvement: a) Improved statistics; b) T-channel; c) Larger parameter space coverage. Combination with other results: a) Higher harmonics; b) Spin precession; c) Instrumental effects.
    Keywords: Numerical Analysis
    Type: 7th International LISA Symposium/Space Sciences Institute of Catalonia; Jun 16, 2008 - Jun 20, 2008; Barcelona; Spain
    Format: application/pdf
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