نتایج جستجو برای: walker

تعداد نتایج: 13169  

Journal: :Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention 2004
A Woods J Collier D Kendrick K Watts M Dewey R Illingworth

OBJECTIVE To evaluate the effectiveness of injury prevention training. DESIGN Cluster randomised controlled trial. SETTING Primary care facilities in the East Midlands area of the United Kingdom. SUBJECTS Midwives and health visitors. INTERVENTION Evidence based training session on the risks associated with baby walkers. MAIN OUTCOME MEASURES The primary outcome measures were knowledg...

Journal: :Journal of bacteriology 2008
Vladimir Jakovljevic Simone Leonardy Michael Hoppert Lotte Søgaard-Andersen

Type IV pili (T4P) are dynamic surface structures that undergo cycles of extension and retraction. T4P dynamics center on the PilB and PilT proteins, which are members of the secretion ATPase superfamily of proteins. Here, we show that PilB and PilT of the T4P system in Myxococcus xanthus have ATPase activity in vitro. Using a structure-guided approach, we systematically mutagenized PilB and Pi...

2001
Steven M. Crunk

The most commonly used method for estimating the time domain parameters of an autoregressive process is to use the Yule-Walker equations. The Yule-Walker estimates of the parameters of an autoregressive process are known to often be highly biased. There is a Fourier transform relationship between the autocovariance sequence for an autoregressive process (the estimates of which are used in the Y...

Journal: :Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie 2017
Maria Claudia Jurcă Kinga Kozma CodruŢa Diana Petcheşi Marius Bembea Ovidiu Laurean Pop Gabriela MuŢiu Mihaela Cristiana Coroi Alexandru Daniel Jurcă Luciana Dobjanschi

Dandy-Walker complex (DWC) is a malformative association of the central nervous system. DWC includes four different types: Dandy-Walker malformation (vermis agenesis or hypoplasia, cystic dilatation of the fourth ventricle and a large posterior fossa); Dandy-Walker variant (vermis hypoplasia, cystic dilatation of the fourth ventricle, normal posterior fossa); mega cysterna magna (large posterio...

2018
Elizabeth Manafo Lisa Petermann Ping Mason-Lai Virginia Vandall-Walker

It has been highlighted that the original manuscript [1] contains a typesetting error in the surname of Virginia Vandall-Walker. This was incorrectly captured as Virgnia Vandall-Walker in the original manuscript which has since been updated.

2003
T. Q. S. Truong A. Stacey

The problem of searching for a walker that wants to be found, when the walker moves toward the helicopter when it can hear it, is an example of a two sided search problem which is intrinsically difficult to solve. Thomas et al [1] considered the effectiveness of three standard NATO search paths [2] for this type of problem. In this paper a genetic algorithm is used to show that more effective s...

2015
Hao Zeng Piotr Wasylczyk Camilla Parmeggiani Daniele Martella Matteo Burresi Diederik Sybolt Wiersma

The first microscopic artificial walker equipped with liquid-crystalline elastomer muscle is reported. The walker is fabricated by direct laser writing, is smaller than any known living terrestrial creatures, and is capable of several autonomous locomotions on different surfaces.

Journal: :Molecular biology of the cell 2002
Natalya S Frolova Nancy Schek Nadia Tikhmyanova Thomas R Coleman

Cdc6 performs an essential role in the initiation of eukaryotic DNA replication by recruiting the minichromosome maintenance (MCM) complex onto DNA. Using immunodepletion/add-back experiments in Xenopus egg extracts, we have determined that both Walker A (ATP binding) and Walker B (ATP hydrolysis) motifs of Xenopus Cdc6 (Xcdc6) are essential, but have distinct functional roles. Although Walker ...

Journal: :Clinical Interventions in Aging 2007
Daniel A Andersen Bernard A Roos Damian C Stanziano Natasha M Gonzalez Joseph F Signorile

The relationship between perceived health and walker use has seldom been addressed. Concerns over falls and falls risk are precursors to walker use. We compared the SF-36 scores of 26 women and 14 men, mean age 86.8 +/- 6.0 years based on walker use and faller status. An analysis of covariance (ANCOVA) with age as the covariate, compared groups for the SF-36 constructs and totals score. Signifi...

Journal: :Molecular medicine reports 2014
Bingling Dai Junpeng Qi Rui Liu Yanmin Zhang

Eupolyphaga sinensis Walker has been reported to have anticoagulation, antithrombotic, liver protective and antitumor effects. In the present study, the inhibitory effects on proliferation of A549 human non‑small cell lung cancer cells and the underlying mechanisms were examined. Firstly, three solvents, 70% ethanol, distilled water and 95% ethanol, were used to extract Eupolyphaga sinensis Wal...

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