Abstract PD-045

Eccc Tr 97 - 045

We provide another proof of the Sipser{Lautemann Theorem by which BPP MA (PH). The current proof is based on strong results regarding the ampliication of BPP, due to Zuck-erman. Given these results, the current proof is even simpler than previous ones. Furthermore, extending the proof leads to two results regarding MA: MA ZPP NP (which seems to be new), and that two-sided error MA equals MA. Fi...

045-051 Tompkin

The environment in which foods are prepared and handled can have significant impact on microbiological safety and quality, particularly for ready-to-eat foods. Outbreaks associated with Listeria monocytogenes and salmonellae have led to an increasing awareness that certain pathogens can persist in food processing environments, contaminate foods as they are being processed and lead to foodborne ...

Effacing Escherichia coli 045:K"E65" Strain

The ability of a nonenterotoxigenic, K88-negative porcine Escherichia coli strain of serogroup 045:K"E65" to induce attaching-effacing lesions was investigated in newborn pigs. Typical attaching-effacing lesions, characterized by intimate adherence of bacteria to mature enterocyte brush borders with effacement of the microvilli, were observed on light and electron microscopy. Bacteria were also...

IIASA IR - 97 - 045 / October Catastrophic Risk Evaluation

Interim Reports on work of the International Institute for Applied Systems Analysis receive only limited review. Views or opinions expressed herein do not necessarily represent those of the Institute, its National Member Organizations, or other organizations supporting the work. Abstract A body of empirical evidence has shown that many managers would welcome new ways of highlighting catastrophi...

abstract