DISCUSSION:

The January Meeting will be a presentation by James A. Simmons, Ph.D., with the department of Neuroscience at Brown University. He will discuss a Biosonar Approach to Synthetic Aperture Imagin.

Today's electronic sonar processing can differentiate between echoes about 12 millionths of a second apart. Bats have it down to 2 to 3 millionths of a second. Being able to separate such sounds means that bats can tell the difference between objects and shapes that are separated by only about the width of a human hair.

Jim will show how the bat's auditory system develops a cascade of representations for the broadcast and echoes that together solve several design problems in sonar in a way that is not mutually exclusive.

For more information about the Narrangansett Chapter please visit: http://www.intap.net/~nc/

A very detailed abstract is available at www.gbcasa.org/Notices/ASAJan03.html

DINNER PLANS:

Menu choices:
Chicken Cordon Bleu
Baked Scrod with Lemon Butter
Rolls, Ceasar Salad, Oven Roasted Potatoes, Maple Glazed Carrots, Apple Tartlett, Coffee & Tea are included with both selections

Dinner Attendance and meal selection response required by January 6, 2003

COST:

All selections are $18.00 with payment at the door. Students are half price. Guest are always most welcome.

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