Meanwhile, its Scanaflow device is an at-home urine-testing apparatus that can test for drugs or even a possible pregnancy.
Instead, mathematicians turn to other, indirect, methods that can test for primality without factorisation.
They use automated tools that can test up to a million passwords a second.
Ms. Kerr says there are a couple of factors that can test for entitlement traits, such as resourcefulness and adaptability.
"We're developing a system that can test a person for work-related hearing loss with the same level of accuracy that they would get from visiting a doctor.
Building momentum through each round, with opponents that can test you but not beat you or grind you down, is the luck of champions.
Mr. Heller, 23, who speaks fluent Spanish and teaches the classics and right angles with equal fervor, acknowledged the frustrations that can test a teacher's idealism.
Everything from soil probes that can test for nutrient deficiency to satellite navigation systems linked to tractors and GPS enabled smartphones can help produce a maximum amount of food with minimal environmental disruption.
Their equipment includes highly sensitive detectors and two transportable laboratories that can test for the presence of chemical and biological agents, identify their composition or strain and conduct DNA fingerprinting.
Among the requirements, the agency wants a contractor with no less than five years' experience that can test 1,000 candidates a year, offering the written tests at sites across the city, within walking distance of subway or bus stops.
The C.D.C. now has a laboratory that can test for 150 chemicals that could be used as weapons in an attack on humans, said Dr. Jackson, who heads the agency's environmental health center.
