نتایج جستجو برای: crash worthiness

تعداد نتایج: 10027  

Journal: :Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention 2005
C Zwerling C Peek-Asa P S Whitten S-W Choi N L Sprince M P Jones

OBJECTIVES Motor vehicle crash fatality rates have been consistently higher in rural areas than in urban areas. However, the explanations for these differences are less clear. In this study the decomposition method was used to explore the factors associated with increased fatal crash involvement rates in rural communities. DESIGN Using national databases, the fatal crash incidence density was...

Journal: :Educational Management Administration & Leadership 2022

This article is exploratory and experimental. It starts from the premise that leadership scholarship a site of disagreement, where mainstream claims are challenged by critical scholars. Some criticism focuses on conceptual clarity, incorporates consideration who should be categorised as leader, what basis, whether it helpful to refer ‘leaders’ ‘followers’. The ‘new wave’ studies generates contr...

2000
Kenneth L. Smith

This paper uses the method of cross spectral analysis to examine preand post-1987 crash comovements among several Pacific Rim markets. The results support increased post-crash comovements among the markets. Each of the pairwise median coherences was greater in the post-crash period. The same is true for the post-crash mean coherences, with one exception. The nonparametric Wilcoxon Z statistics ...

Journal: :Annals of the rheumatic diseases 2006
G Wynne-Jones G J Macfarlane A J Silman G T Jones

OBJECTIVE To determine the rate of new onset of widespread pain after a traumatic event (motor vehicle crash). METHODS A prospective cohort study of persons registered with an insurance company who had or had not experienced a motor vehicle crash. All participants were sent a questionnaire to assess pre-crash (or for the non-crash group, prior) psychosocial factors and widespread pain. Partic...

1996
MALCOLM H. RAY

A method of comparing two acceleration time histories to determine whether they describe similar physical events is described. The method can be used to assess the repeatability of full-scale crash tests and it can also be used as a criterion for assessing how well a finite-element analysis of a collision event simulates a corresponding full-scale crash test. The method is used to compare a ser...

1999
ANDERS JOHANSEN

We study a rational expectation model of bubbles and crashes. The model has two components: (1) our key assumption is that a crash may be caused by local self-reinforcing imitation between noise traders. If the tendency for noise traders to imitate their nearest neighbors increases up to a certain point called the “critical” point, all noise traders may place the same order (sell) at the same t...

2000
Didier Sornette

We study a rational expectation model of bubbles and crashes. The model has two components : (1) our key assumption is that a crash may be caused by local self-reinforcing imitation between noise traders. If the tendency for noise traders to imitate their nearest neighbors increases up to a certain point called the “critical” point, all noise traders may place the same order (sell) at the same ...

2000
Didier Sornette

We study a rational expectation model of bubbles and crashes. The model has two components : (1) our key assumption is that a crash may be caused by local self-reinforcing imitation between noise traders. If the tendency for noise traders to imitate their nearest neighbors increases up to a certain point called the “critical” point, all noise traders may place the same order (sell) at the same ...

R. Zarei,

This research deals with axial and oblique impact crash tests on simple and hybrid composite tubes. Axial and oblique impact tests have been generated on simple and hybrid composite tubes with one, two and three layers. A drop test rig was used to conduct the experiments. Furthermore, in order to gain more detailed knowledge about the crash process, finite element simulations of the experim...

1999
Anders Johansen Olivier Ledoit

We study a rational expectation model of bubbles and crashes. The model has two components : (1) our key assumption is that a crash may be caused by local self-reinforcing imitation between noise traders. If the tendency for noise traders to imitate their nearest neighbors increases up to a certain point called the \critical" point, all noise traders may place the same order (sell) at the same ...

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