Dusk-Dawn Asymmetries in SuperDARN Convection Maps.

The Super Dual Auroral Radar Network (SuperDARN) is a collection of radars built to study ionospheric convection. We use a 7-year archive of SuperDARN convection maps, processed in 3 different ways, to build a statistical understanding of dusk-dawn asymmetries in the convection patterns. We find that the data set processing alone can introduce a bias which manifests itself in dusk-dawn asymmetries.

Resolving Magnetopause Shadowing Using Multimission Measurements of Phase Space Density.

Loss mechanisms act independently or in unison to drive rapid loss of electrons in the radiation belts. Electrons may be lost by precipitation into the Earth's atmosphere, or through the magnetopause into interplanetary space-a process known as magnetopause shadowing. While magnetopause shadowing is known to produce dropouts in electron flux, it is unclear if shadowing continues to remove particles in tandem with electron acceleration processes, limiting the overall flux increase.

Prediction of individual dosage of nortriptyline in depressed elderly outpatients.

Individual daily dosages of nortriptyline (NT) can be predicted from administration of a 50-mg or 100-mg single test dose, with a determination of the plasma level 24 hours later. Because the 50-mg or 100-mg test dose used in previous studies may cause unmanageable acute side effects in elderly patients, a 25-mg NT test dose was used to establish a 24-hour plasma level in 18 physically healthy, moderately depressed, geriatric outpatients. Correlations between the 24-hour test dose plasma level and steady state levels were done for maintenance dosages of 50, 75, and 100 mg/day.

Epidemiology of depression and dysphoria in an elderly Hispanic population. Prevalence and correlates.

Depression among older minority groups, including Hispanics, has not been well studied. Little is known of the true rates of depression, it correlates or how well it is treated. This research is part of a series examining health status of older Hispanics using the Comprehensive Assessment and Referral Evaluation (CARE).

Pretreatment orthostatic hypotension as a predictor of response to nortriptyline in geriatric depression.

The consequences of orthostatic hypotension, a serious and common problem among the elderly, are falls, transient ischemic attacks, strokes, and myocardial infarctions. Depressed elderly taking tricyclic antidepressants (TCAs) are at increased risk, and the pretreatment presence of orthostatic hypotension is considered a relative contraindication to TCA treatment. Recently, it was reported that the presence of pretreatment orthostatic hypotension in geriatric outpatients with unipolar depression predicted good clinical response to imipramine or doxepin.