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The "fruit machine" was a battery of psychological tests developed in Canada by Dr. Frank Robert Wake, [1] a psychology professor with Carleton University [2] in the 1960s.It was hoped that Dr. Wake's research program would be able to help the Government of Canada identify gay men working in the Public Service or to prevent gay people from obtaining government jobs.
The M8 detector paper does not detect agents in the form of aerosols or vapors. The M8 was a Canadian invention, being first standardized in 1963. [ 2 ] By 1964 it entered US service as part of the M15A2 Chemical Agent Detector Kit, with about 67,000 of these kits being produced from 1965-1969, with most other NATO nations also purchasing the M8.
Critics claim that professional counterfeiters use starch-free paper, making the pen unable to detect the majority of counterfeit money in circulation. [4] Magician and skeptic James Randi has written about the ineffectiveness of counterfeit pens on numerous occasions [ 5 ] [ 6 ] and uses a pen as an example during his lectures. [ 7 ]
The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military, industrial, and ...
A test light, test lamp, voltage tester, or mains tester is a piece of electronic test equipment used to determine the presence of electricity in a piece of equipment under test. A test light is simpler and less costly than a measuring instrument such as a multimeter , and often suffices for checking for the presence of voltage on a conductor.
A test probe is a physical device used to connect electronic test equipment to a device under test (DUT). Test probes range from very simple, robust devices to complex probes that are sophisticated, expensive, and fragile. Specific types include test prods, oscilloscope probes and current probes.
Urine-indicator dye is a mythical substance that is supposed to be able to react with urine to form a colored cloud in a swimming pool or hot tub, thus indicating the location of people who are urinating while they are in the water.
Seward's model was based upon "charge transport through the Mylar-paper-platen structure" [5] and is appropriately called the 'charge transport model'. Subsequent testing [7], [8] demonstrated that the charge transport model, while not perfect, is sound. This testing also clarified that areas of indentation are less negatively charged than ...