Peter Veltkamp - Academia.edu (original) (raw)
I am a retired academic and still interested in the foundations of physics and philosophy.
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Papers by Peter Veltkamp
Probability in the Engineering and Informational Sciences, 1988
Systems are studied that consist of interfering components which are alternatively active (busy) ... more Systems are studied that consist of interfering components which are alternatively active (busy) and passive (idle) for random periods. Such systems naturally arise from the performance evaluation of computer models. A concrete invariance condition is imposed on the interferences allowed. Under this condition, the steady-state vector of active components is shown to be of product form as well as to be robust to distributional forms of active and passive periods. The proof is simple and self-contained. A number of concrete and generic examples is provided. These include resource sharing mechanisms, hierarchical circuit switchings, parallel processing, priorities, and breakdowns.
Performance Evaluation, 1994
Interference graphs are used for performance analysis of multiprocessor interconnection networks.... more Interference graphs are used for performance analysis of multiprocessor interconnection networks. In order to model blocked transmissions, nodes can have three states: idle, active or blocked. The resulting steady state probability distribution has a non-product form. Macro states are introduced to calculate performance measures, and the corresponding macro state probability distribution is approximated by a special type of fixed point iteration: the macro approximation, which is very efficient for pointsymmetric interference graphs.
Biophysical Chemistry, 1982
In this paper. the results are presented of zneasurementi of the dielectric dispersions of horse ... more In this paper. the results are presented of zneasurementi of the dielectric dispersions of horse heart cytochrome c molecules in various buffers. The data are fitted to the Cole-Cole relaxation model. The influence of the concenrration and the ionic strength on the parameters chat result from the Cole-Cole model is determined. The measured data are compared with calculations based on Ihe model presented previously. Good agreement is found between the model and the obsemed data.
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
Physics Letters A, 1983
We discuss the following problem of statistical inference in quantum theory: a statistical operat... more We discuss the following problem of statistical inference in quantum theory: a statistical operator W 0 is given a priori; we are then asked to determine the best choice W 1 for a statistical operator a posteriori, ie after a number of measurement results on the physical system in question ...
Probability in the Engineering and Informational Sciences, 1988
Systems are studied that consist of interfering components which are alternatively active (busy) ... more Systems are studied that consist of interfering components which are alternatively active (busy) and passive (idle) for random periods. Such systems naturally arise from the performance evaluation of computer models. A concrete invariance condition is imposed on the interferences allowed. Under this condition, the steady-state vector of active components is shown to be of product form as well as to be robust to distributional forms of active and passive periods. The proof is simple and self-contained. A number of concrete and generic examples is provided. These include resource sharing mechanisms, hierarchical circuit switchings, parallel processing, priorities, and breakdowns.
Performance Evaluation, 1994
Interference graphs are used for performance analysis of multiprocessor interconnection networks.... more Interference graphs are used for performance analysis of multiprocessor interconnection networks. In order to model blocked transmissions, nodes can have three states: idle, active or blocked. The resulting steady state probability distribution has a non-product form. Macro states are introduced to calculate performance measures, and the corresponding macro state probability distribution is approximated by a special type of fixed point iteration: the macro approximation, which is very efficient for pointsymmetric interference graphs.
Biophysical Chemistry, 1982
In this paper. the results are presented of zneasurementi of the dielectric dispersions of horse ... more In this paper. the results are presented of zneasurementi of the dielectric dispersions of horse heart cytochrome c molecules in various buffers. The data are fitted to the Cole-Cole relaxation model. The influence of the concenrration and the ionic strength on the parameters chat result from the Cole-Cole model is determined. The measured data are compared with calculations based on Ihe model presented previously. Good agreement is found between the model and the obsemed data.
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
Physics Letters A, 1983
We discuss the following problem of statistical inference in quantum theory: a statistical operat... more We discuss the following problem of statistical inference in quantum theory: a statistical operator W 0 is given a priori; we are then asked to determine the best choice W 1 for a statistical operator a posteriori, ie after a number of measurement results on the physical system in question ...