We describe some features of the tactic language implemented in the theorem prover Ergo 5. This is a variant of the generic tactic language Angel. We have adapted the language by changing the semantics of its parallel composition operator, the operator by which diierent tactics are applied to diierent branches in a proof tree. The paper includes a denotational semantics for this operator, and a...

We describe an environment that considerably simplifies the process of generating Bayesian belief networks. The system has been implemented on readily available, inexpensive hardware, and provides clarity and high performance. We present an introduction to Bayesian belief networks, discuss algorithms for inference with these networks, and delineate the classes of problems that can be solved wit...

A direct very simple proof that there can be no closed trapped surfaces (ergo no black hole regions) in spacetimes with all curvature scalar invariants vanishing is given. Explicit examples of the recently introduced “dynamical horizons” which nevertheless do not enclose any trapped region are presented too.

R. Weber, P. A. Behnisch, A. Brouwer, B. van Bavel, G. Lindstroem, M. Zennegg, B. Schilling, O. Paepke POPs Environmental Consulting, Ulmenstr. 3, 73035 Göppingen, Germany BioDetection Systems BV (BDS), Kruislaan 406, 1098 SM Amsterdam, The Netherlands MTM Research Center Örebro, Sweden EMPA, Swiss Federal Laboratories for Materials Testing and Research, Dübendorf, Switzerland EurofinsERGO, Ge...

nesses. Knowledge-based techniques that are listed above have two common characteristics: 1. they all work on knowledge bases containing ergo-nomic rules (i.e., guidelines, design rules, recommendations). However, we will see how these various rules have been coded and used within the tools.

For more than a decade, educators and media critics have been arguing that we are on the threshold of a new age of visual thinking (e.g., Pittman, 1990). Their reasoning: young people's minds are now being molded from the earliest years by intense exposure to television and other visual media; consequently, the young people of today are part of a new 'visual generation.' This is a widely accept...

Limiting dietary carbohydrates inhibits glioma growth in preclinical models. Therefore, the ERGO trial (NCT00575146) examined feasibility of a ketogenic diet in 20 patients with recurrent glioblastoma. Patients were put on a low-carbohydrate, ketogenic diet containing plant oils. Feasibility was the primary endpoint, secondary endpoints included the percentage of patients reaching urinary ketos...

A Sybil attack occurs when an adversary controls multiple system identifiers (IDs). Limiting the number of (bad) IDs to a minority is critical for tolerating malicious behavior. popular tool enforcing bad resource burning (RB): verifiable consumption network resource. Unfortunately, typical RB defenses require non-Sybil (good) consume at least as many resources adversary. We present new defense...

iii ACKNOWLEDGMENTS The execution of the body of research this document represents would not have been possible without the advice, instruction, and encouragement of many individuals. recommendations during the entirety of the research have been very valuable. I am grateful to the members of the dissertation committee for their input and review of papers and my dissertation. The continued encou...