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Feining (pronounced feen-ing) refers to the intense, compulsive craving for drugs, alcohol, or other substances that characterizes addiction

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Purpose-built smoking monitoring devices for STR and hospitality use operate on a different principle, typically combining multiple sensor types, including VOC sensors, particulate sensors, and in more sophisticated devices, machine-learning-based chemical pattern recognition, to detect the air quality signatures of tobacco combustion, cannabis combustion, and vaping aerosol at the concentrations produced by normal indoor smoking behavior