Detecting impairment from cannabis is not as straightforward as detecting alcohol because of the complex nature of the drug and lack of conclusive research about the dose–effect of cannabis. The widely used breathalyzer test can accurately detect alcohol impairment using a breath sample because the amount of alcohol in exhaled air closely relates to the amount of alcohol in the blood, says Dr. ...

P arents of teenagers will recognize the following scenario: parent comprehensively lecturing teenager on some topic at hand, carefully outlining the rationale for a parental decision, invoking extensive reasoning of why one option is better than another for good adolescent decision-making, etc, etc. Teenager looks away, rolls eyes (possibly, but not necessarily outside of visual field of paren...

A seller often needs to determine the amount of product information to provide to consumers. We model costly consumer information search in the presence of limited information. We derive the consumer’s optimal stopping rule for the search process. We find that, in general, there is an intermediate amount of information that maximizes the likelihood of purchase. If too much information is provid...

Abstract The objective of current research is to investigate distribution patterns of vegetation types and its relation with environmental factors in southern margin of Haj Aligholi Kavir of Damghan. Three vegetation types including Halecnemum strobilaceum, Sedlitzia rosmarinus and Artemisia sieberi were studied in marginal arid regions and uplands of the study area. Firstly, geographic locat...