OBJECTIVES This study evaluated the mechanical performance, under low-load cyclic loading, of two different knotless suture anchor designs: sutures completely internal to the anchor body (SpeedScrew) and sutures external to the anchor body and adjacent to bone (MultiFIX P). METHODS Using standard suture loops pulled in-line with the rotator cuff (approximately 60°), anchors were tested in cad...

A posture and load sampling approach to measure physical exposures was implemented within a case-control study of low-back pain reporting. The purpose of this paper was to determine how well this method was able to identify known low-back pain risk factors. Subjects, including both cyclic production and non-cyclic support workers, were studied while working in an automotive assembly facility. T...

Because of it’s economy, high strength-to-weight ratio and stiffness-to-weight ratio, wood can compete with steel and reinforced concrete as a construction material in a market with an increasing demand for large structures such as community buildings, gymnasiums, schools and bridges. However, continued acceptance or expansion in this market, particularly in high wind or seismic areas, depends ...

Numerous studies have investigated the kinematics of arm movements; others have examined grip forces during static holding of objects. However, the coordination of grip force and arm movement when moving grasped objects has not been documented. We show that grip force is finely modulated in phase with load force during movements with grasped objects in which load force varies with acceleration....

PURPOSE To compare the biomechanical performance of medial row suture placement relative to the musculotendinous junction (MTJ) in a cadaveric transosseous equivalent suture bridge (TOE-SB) double-row (DR) rotator cuff repair (RCR) model. METHODS A TOE-SB DR technique was used to reattach experimentally created supraspinatus tendon tears in 9 pairs of human cadaveric shoulders. The medial row...

Azarashvili T, Krestinina O, Galvita A, Grachev D, Baburina Y, Stricker R, Evtodienko Y, Reiser G. Ca -dependent permeability transition regulation in rat brain mitochondria by 2 ,3 -cyclic nucleotides and 2 ,3 -cyclic nucleotide 3 -phosphodiesterase. Am J Physiol Cell Physiol 296: C1428–C1439, 2009. First published April 8, 2009; doi:10.1152/ajpcell.00006.2009.—Recent evidence indicates that 2...

The use of bicortical screws to fix metacarpal fractures has been suggested to provide no added biomechanical advantage over unicortical screw fixation. However, this was only demonstrated in static loading regimes, which may not be representative of biological conditions. The present study was done to determine whether similar outcomes are obtained when cyclic loading is applied. Transverse mi...

The objective of the paper is to study the effect of cyclic loading on the fracture resistance of the SA 333 Gr.6 carbon steel material of the primary heat transport (PHT) system piping of Indian pressurized heavy water reactors (PHWR). Tests have been carried out on compact tension specimens machined from the pipe used in the PHT system. The effect of load ratio, incremental plastic displaceme...

To investigate the seismic behavior of end-plate connection semi-rigid space steel frames, three 1/4-scale specimens were tested under cyclic load. Finite element analysis which took initial geometric imperfections into consideration was also conducted, and the results conform to experimental results. The failure modes, hysteretic behavior, deformation capacity and energy-dissipation capacity o...

The engine manufacturer has aimed to attain optimum values for engines operating different loads and speeds by utilizing the characteristics of both spark-ignition having a ready combustion control compression ignition resulting in low emissions, fuel consumption and, high output power years. In this regard, efforts on improvement performance, thermal efficiency have been constantly continuing ...