نتایج جستجو برای: duration dependence
تعداد نتایج: 358408 فیلتر نتایج به سال:
OBJECTIVE To determine if there is a minimum duration, frequency or quantity of tobacco use required to develop symptoms of dependence. DESIGN AND SETTING A retrospective/prospective longitudinal study of the natural history of tobacco dependence employing individual interviews conducted three times annually in two urban school systems over 30 months. Detailed histories of tobacco use were ob...
The statistics of sea state duration (persistence) have been found to be dependent upon the recording interval ∆t. Such behavior can be explained as a consequence of the fact that the graph of a time series of an environmental parameter such as the significant wave height has an irregular, “fractal” geometry. The mean duration, τ can have a power-law dependence on ∆t as ∆t → 0, with an exponent...
Although cannabis is the most commonly used illicit drug, duration of cannabis use is typically short, with many of those who initiate cannabis use ceasing use by their late twenties. In this paper we analyze data from a volunteer Australian cohort of 6265 male and female twins to examine whether the duration of cannabis use is an informative phenotype for future genetic analyses. Genetic model...
PURPOSE The objective of this study was to determine whether adolescent smokers, who varied in their smoking histories and symptoms of nicotine dependence, exhibit any decrease in puff volume and duration similar to that typically seen in dependent adolescent and adult smokers. Moreover, we examined whether puffing trajectories were moderated by individual difference factors, as well as whether...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید