Objective: To quantify the influence of soccer-specific fatigue on functional stability. Participants and design: Ten male semi-professional soccer players completed a 90min treadmill protocol replicating the activity profile of match-play with a passive 15min half-time interval. Main outcome measures: At 15min intervals players completed a 30 s single-legged balance task on an unstable platfor...

Understanding the degree of leg stiffness during human movement would provide important information that may be used for injury prevention. In the current study, we investigated bilateral differences in leg stiffness during one-legged hopping. Ten male participants performed one-legged hopping in place, matching metronome beats at 1.5, 2.2, and 3.0 Hz. Based on a spring-mass model, we calculate...

This study set out to evaluate the effectiveness of Antilock-Brakes (ABS) on motorcycles in reducing real-life crashes. Since the European Parliament has voted a legislation to make ABS mandatory for all new motorcycles over 125cc from 2016, the fitment rate in the entire Europe is likely to increase in the years to come. Previous research, however, analyzed mostly large displacement motorcycle...

OBJECTIVES To assess the incidence and awareness of taekwondo athletes in Saudi Arabia regarding oral and maxillofacial (OMF) injuries and their prevention. Methods: In this cross-sectional study, an online questionnaire about the incidence and awareness of OMF injuries and their prevention was developed and distributed to taekwondo athletes in Saudi Arabia via their coaches.  Results: Sixty-ei...

BACKGROUND The evidence linking knee kinematics and kinetics during a vertical drop jump (VDJ) to anterior cruciate ligament (ACL) injury risk is restricted to a single small sample. Still, the VDJ test continues to be advocated for clinical screening purposes. PURPOSE To test whether 5 selected kinematic and kinetic variables were associated with future ACL injuries in a large cohort of Norw...

We used a random-dot two-frame apparent motion paradigm to investigate whether age-related declines in motion perception are caused by deficits in integrating spatial information, temporal information, or both. Two random-dot patterns were presented sequentially on a black screen, separated by a blank inter-stimulus interval ranging from 0.01 s to 0.240 s. From the first to the second pattern, ...

Climate change velocity is a vector depiction of the rate of climate displacement used for assessing climate change impacts. Interpreting velocity requires an assumption that climate trajectory length is proportional to climate change exposure; longer paths suggest greater exposure. However, distance is an imperfect measure of exposure because it does not quantify the extent to which trajectori...

Discriminating data classes emanating from sensors is an important problem with many applications in science and technology. We describe a new transform for pattern identification that interprets patterns as probability density functions, and has special properties with regards to classification. The transform, which we denote as the Cumulative Distribution Transform (CDT) is invertible, with w...

Monitoring structural stability in urban areas and infrastructure networks is emerging as one of the dominant socio-economic issues for population security. The problem accentuated by age because increasing risks due to material deterioration loss load capacity. In this case, SAR satellite data are crucial identify assess deteriorating conditions civil infrastructures. large amount available fr...