By using operant conditioning techniques one group of 8 rats was trained to reach through a hole in the wall of an operant chamber, and to exert downward responses on a force-sensing circular disk. Eight other rats learned to reach through the hole and grasp and pull toward them a wire bail attached to a force transducer. Both behaviors were maintained on a fixed ratio 20 schedule of water rein...

We analyze the dynamic behavior of a spherical microparticle submerged in a fluid medium, driven to the node of a standing bulk acoustic wave created by two opposing transducers. We derive the dynamics of the fluid-particle system taking into account the acoustic radiation force and the time-dependent and time-independent drag force acting on the particle. Using this dynamic model, we character...

BACKGROUND The new IOFIX is an intra-osseous fixation device comprising an "X-post" through which a lag screw passes to apparently improve force distribution across an arthrodesis. We conducted a novel human cadaveric study. Our null hypothesis was no difference in force exists in an ankle arthrodesis model stabilized with the IOFIX or a conventional single lag screw. METHOD In ten cadaver an...

This study is an investigation of the machinability of experimental Ti-Cu alloys (2, 5, and 10mass% Cu) as new dental titanium alloy candidates for CAD/CAM use. The alloys were slotted with a vertical milling machine and carbide square end mills under two cutting conditions. Their machinability was evaluated through cutting force using a three-component force transducer fixed on the table of th...

Force measurements from experiments conducted in water on a flapping-and-pitching thin flat plate wing of semi-elliptic planform at low Reynolds numbers are reported. Time varying force data, measured using a force transducer, provide a means to understand the mechanisms that lead to enhanced performance observed in insect flight compared to fixed wing aerodynamics. Experimental uncertainties a...

Since prestressed concrete members rely on the tensile strength of the prestressing strands to resist loads, loss of even few them could result catastrophic. Therefore, it is important to measure present residual prestress force. Although there are some techniques for obtaining present prestress force, some problems still remain. One method is to install load cell in front of anchor head but th...

A biomechanical study has been carried out on 20 cadaveric knees to investigate their load-absorbing mechanism. The impact load was applied using a weight falling onto the transected proximal femur and the force transmitted through the knee was measured at the transected distal tibia using a load transducer. The peak force transmitted increased as, sequentially, meniscus, articular cartilage an...

There are many circumstances where it is desirable to obtain the contractile response of skeletal muscle under physiological circumstances: normal circulation, intact whole muscle, at body temperature. This includes the study of contractile responses like posttetanic potentiation, staircase and fatigue. Furthermore, the consequences of disease, disuse, injury, training and drug treatment can ...

Abstract Acoustic trapping is a useful method for handling biological samples in microfluidic systems. The aim of this work twofold: first to investigate the physics behind acoustic glass capillary and secondly perform binary trapping. latter achieved by increasing density fluid channel. device consisted with rectangular inner cross-section (height 200 µ m × width 2000 m) equipped small piezoel...

This paper proposes a local approach for the on-line tuning of semi-active vibration control unit, which is set to reduce resonant response target low-order flexural modes distributed structures subject broadband stochastic disturbances. The idea have multiple self-contained units, can be fixed on thin walled and sound radiation at low audio frequencies where dynamics controlled by modes. unit ...