David Polhemus

Upper Body Tracking Using the Polhemus Fastrak

1. Introduction This technical report presents the design and implementation of the sensor system used to track the arms and ri BLOCKINe motions with respect to the upper body. This was performed as part of the AUSA`95 dismounted infantry work { an eort to insert humans into NPSNet's distributed virtual environment. The sensor work can be divided into three areas: (1) the Fastrak setup includin...

On the genus Calyptobates Polhemus & Polhemus (Hemiptera: Heteroptera: Gerridae) from India with description of a new species and a key to the species of World.

Calyptobates rajani sp. nov. is described from Great Nicobar Island, Andaman and Nicobar Islands, India. This new species is closely related to C. andaman Polhemus & Polhemus, 1994, described from Andaman Islands, India. Two species of Calyptobates Polhemus & Polhemus including the new species are presently known from India. A key to the species of Calyptobates from world and the distribution m...

Description of the egg and immature stages of Potamobates anchicaya J. Polhemus & D. Polhemus, 1995 (Hemiptera: Heteroptera: Gerridae) and intersexual variation in adults.

The egg and five nymphal stages, of the Neotropical species Potamobates anchicaya are described and illustrated for the first time. Intra- and intersexual variation in the abdominal terminalia of apterous adults is also illustrated. Adults and nymphs were collected from three populations in southwestern Colombia. 

David Thaw

David Foster

Research Interest:-Cancer Biology The goal of our research effort is to understand the biology of cancer cells. From an understanding of the defects in a cancer cell, rational strategies for treatment can be developed.