منابع مشابه
Neurite Extension: Starting at the Finish Line
The outgrowth of axons and dendrites from neuronal cell bodies to their appropriate targets is the canonical means of creating new processes. Heiman and Shaham (2009) now show that neuronal processes can also be made by anchoring dendrite tips at their target locations while the cell body pulls away, a process termed retrograde extension.
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We study the scheduling problem of minimizing the maximum starting time on-line. The goal is to minimize the last time that a job starts. We show that while the greedy algorithm has a competitive ratio of (logm), we can give a constant competitive algorithm for this problem. We also show that the greedy algorithm is optimal for resource augmentation in the sense that it requires 2m 1 machines t...
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In this issue of the Journal, we present the final article in our yearlong series on education and training in pathology and laboratory medicine. This article, by Hsieh and Nolan,1 is based on the results of a survey of pathology residents designed to assess the confidence, knowledge, and skills of residents at the beginning of residency training. Understanding where residents begin in terms of...
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When marking the subjective midpoint of a horizontal line, patients with left unilateral neglect typically deviate rightward. Different accounts of this pattern of performance refer either to a biased competition between the two hemi-segments of the line, with the right part being subjectively perceived as longer than the left part, or to a distortion of a cognitive representation of space, wit...
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The purpose of this study was to investigate the effects of the ovarian hormones and the use of oral contraceptive pills (OCP) on cardiac vagal withdrawal at the onset of dynamic exercise. Thirty physically active women aged 19-32 years were divided into two groups: OCP users (n = 17) and non-OCP users (n = 13). Participants were studied randomly at three different phases of the menstrual cycle...
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ژورنال
عنوان ژورنال: Trends in Pharmacological Sciences
سال: 2015
ISSN: 0165-6147
DOI: 10.1016/j.tips.2015.08.014