Ian D. Rozdilsky and Lewi Stone The Porter Super-Center for Ecological and Environmental Studies and Department of Zoology, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel. E-mail: [email protected] E-mail: [email protected] Abstract Empirical observations often indicate that complexity enhances stability, while most theoretical studies, such as May's (1972) classic paper, point...

Observations of bridge abutment scour lead to a practical new approach for estimating realistic scour IIHR-Hydroscience and Engineering depths at bridge abutments. Prior design approaches usually led to unrealistically deep estimates of abutment scour depth. The observations presented stem from flume experiments conducted with abutments with approach embankments subject to a range of erodibilit...

Windows TM Dam Analysis Modules (WinDAM) is a set of modular software components that can be used to analyze overtopped earthen embankments and internal erosion of embankment dams. These software components are being developed in stages. The initial computational modules address routing of floods through the reservoir with dam overtopping and evaluation of the potential for vegetation or riprap...

For the last fifty years, the design floods of a number of embankment dams were re-evaluated and the revised spillway outflows are often larger than the original design discharges. Several embankment overtopping protection systems were developed for earthfill structures, and the applications range from river dykes to tsunami protections including embankment dams. Well-known designs include timb...

Coherent Deformable Model Yusuf Sinan Akgul Chandra Kambhamettu Maureen Stone Department of Computer and Information Sciences Division of Otolaryngology University of Delaware The University of Maryland Medical School Newark, Delaware 19716 Baltimore, Maryland 21201 Abstract We present a system that extracts and tracks 2D midsagital tongue surfaces from ultrasound image sequences produced by a ...

If the absolute number of poor people goes up, but the fraction of people in poverty comes down, has poverty gone up or gone down? The economist’s instinct, framed by population replication axioms that undergird standard measures of poverty, is to say that in this case poverty has gone down. But this goes against the instinct of those who work directly with the poor, for whom the absolute numbe...