Since then, nearly all studies of weight-loss recidivism have followed patients in formal hospital or university programs, because they are the easiest to identify and keep track of.

An unnamed, high-profile track coach this summer identified international and American track and field athletes who he said were utilizing an undetectable performance-enhancing drug.

Administration officials have made clear that they consider the Patriot Act to be an integral part of their efforts to identify, track and disrupt terrorist activities.

The Treasury Department initiated the Terrorist Finance Tracking Program to identify, track, and pursue terrorists and their networks.

While Stealth aircraft are not completely invisible to enemy radar, the technology makes it difficult to identify, track and destroy a plane.

And no system exists to identify and keep track of possible health effects.

Today's High-definition CCTV cameras have many computer controlled technologies that allow them to identify, track, and categorize objects in their field of view.

Researchers and policymakers can use its records to identify, track, and analyze national trends in health care use, access, charges, quality, and outcomes.

To attempt to set up systematic methods for identifying and keeping track of visitors might stem the flow and Earth is very aware that each visitor brings money with him.

TSA also needs to intensify its efforts to identify, track, and appropriately screen potentially dangerous cargo in both the aviation and maritime sectors.