David Rios

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Feed forward neural networks (FFNN) with an unconstrained random number of hidden neurons deene exible non-parametric regression models. In M uller and Rios Insua (1998) we have argued that variable architecture models with random size hidden layer signiicantly reduce posterior mul-timodality typical for posterior distributions in neural network models. In(More)
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Abstract To ascertain the viability of a project, undertake resource allocation, take part in bidding processes and similar project related decisions, modern project(More)
  • Robert Krimmer, Castle Hofen, Bregenz, Austria, Mag Robert Krimmer, Jörg Becker +64 others
  • 2006
Preface It is now two years since we last met at Castle Hofen to discuss important topics involved with electronic voting. Back then it was intended to bring together interested people in e-voting. What was first planned as a sole academic meeting in the field of information technology has fast become a get-together of academia, administration and vendors(More)
The aim of this study was to enhance the understanding of the antitumor mechanism of 1,4-naphthoquinones and ascorbate. Juglone, phenylaminonaphthoquinone-7, and 9 (Q7/Q9) were evaluated for effects on CT-DNA and DNA of cancer cells. Evaluations in MCF-7 cells are DNA damage, ROS levels, viability, and proliferation. Proteins from MCF-7 lysates were(More)
OBJECTIVE The aim of this study is to describe a technique for percutaneous cervical transfacet screw placement and compare this technique to the open technique with regard to the accuracy of facet capture and the potential of placing neurovascular structures at risk. METHODS Eight cadaveric cervical spines were harvested. One side of each spine was(More)
BACKGROUND Screw length pertains to stability in various orthopedic fixation devices. There is little or no information on the relationship between plate pullout strength and screw length in anterior lumbar interbody fusion (ALIF) plate constructs in the literature. Such a description may prove useful, especially in the treatment of osteoporotic patients(More)
STUDY DESIGN Experimental and finite element analysis of anterior lumbar interbody fixation (ALIF) plate pullout. OBJECTIVE The objective of this study was to determine the effect of screw angle and orientation on ALIF plate pullout strength. SUMMARY OF BACKGROUND DATA It has been thought that angling the screws in an ALIF plate leads to better fixation(More)
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