نتایج جستجو برای: peak acceleration

تعداد نتایج: 185713  

2008
L. Ocola

Post-disaster reconstruction management of urban areas requires timely information on the ground response microzonation to strong levels of ground shaking to minimize the rebuilt-environment vulnerability to future earthquakes. In this paper, a procedure is proposed to quantitatively estimate the severity of ground response in terms of peak ground acceleration, that is computed from macroseismi...

Journal: :Investigative ophthalmology & visual science 2011
Ewa Niechwiej-Szwedo Herbert C Goltz Manokaraananthan Chandrakumar Zahra Hirji J Douglas Crawford Agnes M F Wong

PURPOSE The effects of impaired spatiotemporal vision in amblyopia on visuomotor skills have rarely been explored in detail. The goal of this study was to examine the influences of amblyopia on visually guided reaching. METHODS Fourteen patients with anisometropic amblyopia and 14 control subjects were recruited. Participants executed reach-to-touch movements toward targets presented randomly...

Journal: :Journal of applied physiology 2009
Sally M Rosengren Neil P M Todd James G Colebatch

The vestibular system responds to head acceleration by producing compensatory reflexes in the eyes and postural muscles. In this study, we investigated the effect of brief interaural acceleration on the vestibular evoked myogenic potential (VEMP) in 10 normal subjects and 10 patients with bilateral (bVL) or unilateral vestibular loss (uVL). The stimuli were delivered with a handheld minishaker ...

Journal: :civil engineering infrastructures journal 0
leila haj najafi ph.d. candidate, department of civil and environmental engineering, amirkabir university of technology, tehran, iran. mohsen tehranizadeh professor, department of civil and environmental engineering, amirkabir university of technology, tehran, iran.

this study attempts to answer the question of distinguishing appropriate intensity measure parameter for performance-based design or assessment, taking into account the efficiency aspect. the comprehensive comparative tables proposed in this paper could be an effective support in the decision making procedure for intensity measure selection, comprising most of the frequently utilized intensity ...

1999
Maria Krafft Anders Kullgren Claes Tingvall

AIS 1 neck injuries have become the most common injury in vehicle crashes, especially rear impacts. Reserch has shown that there are variations in rear impacts causing initial symptoms and residual disability to the neck. Therefore impacts in which the duration of symtoms di@er need to be separated in analyses. Concerning AIS 1 neck injury, crash severity is usually measured as change of veloci...

2014
Haruo MURAYAMA Masahito HITOSUGI Yasuki MOTOZAWA Masahiro OGINO Katsuhiro KOYAMA

Most severe head injuries in judo are reported as acute subdural hematoma. It is thus necessary to examine the rotational acceleration of the head to clarify the mechanism of head injuries. We determined the rotational acceleration of the head when the subject is thrown by judo techniques. One Japanese male judo expert threw an anthropomorphic test device using two throwing techniques, Osoto-ga...

2007
Gregory S. Rash

Twelve collegiate football quarterbacks were videotaped while performing drop back passes. The video images were digitized using a Peak Performance system, and three-dimensional (3-D) kinematic and kinetic data were calculated from the 3-D coordinate data using standard analytical procedures. The sequential timing of peak shoulder torques in the delivery for the football throw was peak abductio...

Journal: :Journal of strength and conditioning research 2009
Kieran A Moran Michelle Clarke Frank Reilly Eric S Wallace Dermot Brabazon Brendan Marshall

Although from an athletic performance perspective it may be beneficial to undertake drop jump training when fatigued (principle of "specificity" of training), such endurance fatigue may expose the body to a greater risk of injury if it causes an increase in peak impact accelerations. This study aimed to determine if endurance fatigue resulted in an increase in tibial peak impact acceleration an...

صادقی, حیدر, فضلعلی, حسام, کرمانی, سعید,

Background and purpose: High cost and complication of some instruments assessing functional capabilities in athletes with anterior cruciate ligament (ACL) deficiency have caused increasing attentions towards using inexpensive and user-friendly instruments as accelerometers and gait analyzing based on signal processing. Therefore, gait phases detection seems to be necessary while accelerometer i...

Many researches have been currently conducted on the effects of fault distance on structures revealing that their seismic response can differ according to their distance from the fault. Suspension bridges due to their long period and high flexibility can be more sensitive to this phenomenon, especially in vertical vibration. Since the engineers tend to use longer spans, the length factor should...

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