CONTEXT Lower extremity injury is prevalent among individuals participating in sports. Numerous variables have been reported as predisposing risk factors to injury; however, the effects of muscle fatigue on landing kinetics are unclear. OBJECTIVES To investigate the effects of a single session of repeated muscle fatigue on peak vertical ground-reaction force (GRF) during drop landings. DESI...

Methods After a day of dietary control and caffeine abstinence, otherwise-fasted participants performed four separate, strict squat jumps (SJ) under both conditions 48 – 96 hours apart. The variables measured included peak power (POW), peak force (FOR), peak velocity (VEL), maximal displacement (DSP), and maximal rate of force development (RFD) in the SJ for both Redline energy drink and PLB tr...

Cyclic crushing experiments with a haversine velocity waveform were performed on passively confined, freshwater columnar ice specimens for variety of velocities and frequencies. The aim the was to study deformation failure behavior in when loaded at predefined displacement pattern closely resembling frequency lock-in regime ice-induced vibrations. focus development load grain specimen scales du...

OBJECTIVES Residents of nursing homes often have difficulty swallowing (dysphagia), which complicates the administration of solid oral dosage formulations. Erroneously crushing medication is common, but few interventions have been tested to improve medication safety. Therefore, we evaluated the effect of warning symbols in combination with education on the frequency of erroneously crushing medi...

Robust finite element models are utilised for their ability to predict simple complex mechanical behaviour under certain conditions at a very low cost compared experimental studies, as this reduces the need physical prototypes while allowing optimisation of components. In paper, various parameters in techniques were reviewed simulate crushing glass/epoxy tubes with different material models, me...

Recently, multi-cell structures have received increased attention for crashworthiness applications due to their superior energy absorption capability. However, such were featured with high peak collapsing force (PCL) forming a serious safety concern, and this limited application vehicle structures. Accordingly, paper proposes windowed shaped cuttings as mechanism reduce the PCL of hexagonal tub...

The isometric and isotonic contractile properties of the cross-striated adductor muscle of the bay scallop (Argopecten irradians) were measured in vitro at 10, 15 and 20 degrees C. The length at which twitch force was maximal as a function of the closed length in situ (L0/Lcl) averaged 1.38 +/- 0.01 (mean +/- S.E.M.) at 10 degrees C. This length is very close to the typical length at maximum ga...

Abstract The use of additive manufacturing for the fabrication sacrificial cladding is becoming increasingly popular as it facilitates production complex yet space-saving protective structures. Despite this, effect several structural parameters on their capacity to mitigate high-velocity impacts remains elusive. Toward this end, shock-mitigating various short fiber-reinforced polymer samples wa...

Abstract This work investigates the impact of infill pattern structure on crashworthy performance and deformation history 3D-printed tubes subjected to a quasi-static axial compression load. The proposed were made from polylactic acid (PLA) using 3D printing technique. Five structures adapted, i.e. circular, square, triangle, zigzag cross patterns with 50% density. analysis was carried out by a...

This study uses a unique experimental system to explore the breakage of laboratory-grown, floating saline ice blocks under ice-to-ice contacts. topic is important understanding and modeling force transmission through rubble fields. In collection subjected compressive loading, transmitted via chains, their stability plays crucial role in ice-structure interaction processes. Peak loads are limite...