BACKGROUND A lack of inhibitory control has been suggested to be the core deficit in children with attention deficit hyperactivity disorder (ADHD). This means that a primary deficit in behavioral inhibition mediates a cascade of secondary deficits in other executive functions, such as arousal regulation. Clinical observations have revealed that with increasing age symptoms of hyperactivity and ...

In this paper we address the question: what causes formerly active Wikipedians to stop contributing? Seen from a different angle, we estimate characteristics of users, pages, or the whole system that increase or decrease the probability of dropout. We propose a general statistical method with which hypothetical causes of dropout can be tested. With this method it can be analyzed whether the eme...

We present a new iterative method for probabilistic clustering of data. Given clusters, their centers and the distances of data points from these centers, the probability of cluster membership at any point is assumed inversely proportional to the distance from (the center of) the cluster in question. This assumption is our working principle. The method is a generalization, to several centers, o...

The " Sudden Stop " phenomenon of the recurrent emerging markets crises of the last ten years is one of the key questions facing International Macroeconomics. Sudden Stops are defined by unusually large recessions marked by: sharp, abrupt current account reversals, large contractions in output and absorption, and collapses in goods and asset prices. In Mexico's 1995 Sudden Stop, for example, th...

An innovative school-based telehealth technology was introduced in Hawaii with the purposes of: (1) evaluating students for medical/developmental conditions with educational implications, (2) providing a professionally-monitored Internet-based system of learning/development, and (3) delivering medically-based physical and occupational therapy at the students school. Electronically recorded sati...

OBJECTIVES In the 18 month "alendronate or alfacalcidol in glucocorticoid-induced osteoporosis"-trial (STOP-trial) patients with rheumatic diseases who started glucocorticoids were randomised to anti-osteoporosis therapy with either daily alendronate (10 mg) or alfacalcidol (1 microg). In the present observational open follow-up study of the STOP-trial, we report the long-term effects of risk f...

A new theoretical approach for the determination of capacities at All-Way Stop-Controlled intersections is presented. This approach is based on the Addition-Conflict-Flow method developed from the graph theory. The point of view related to the traffic streams in contrast to existing procedures, which handle only the approaches allows a systematic and realistic analysis of the traffic process at...