[Purpose] The purpose of this study was to investigate the effects of isokinetic passive exercise and motion velocity on passive stiffness. In addition, we also discuss the effects of the contraction of agonist and antagonist muscles on passive stiffness. [Subjects] The subjects were 20 healthy men with no bone or joint disease. [Methods] Isokinetic passive exercise and isometric muscle contrac...

Background Intra-ventricular pressure gradient along the direction of the outflow tract is generated by the impulse response of the myocardial contraction. This spatial pressure gradient, derived from the maximal acceleration estimates within the left ventricular (LV) ejection flow, has been validated in vitro by using MRI and was found strongly related to the inotropic state of the LV as demon...

Introduction: Nearly all clinical MR examinations include imaging with multiple slices. Multiband imaging is a hybrid approach between conventional 2D slice and 3D volumetric excitations where multiple 2D slices are excited and sampled simultaneously. This method yields some of the SNR benefits from a larger excitation volume while reducing the artifact potential from a second phase encoding di...

1. Our goal was to assess whether visual motion signals related to changes in image velocity contribute to pursuit eye movements. We recorded the smooth eye movements evoked by ramp target motion at constant speed. In two different kinds of stimuli, the onset of target motion provided either an abrupt, step change in target velocity or a smooth target acceleration that lasted 125 ms followed by...

We report the development of corrugated slow-wave plasma guiding structures with application to quasiphase-matched direct laser acceleration of charged particles. These structures support guided propagation at intensities up to 2 1017 W/cm2, limited at present by our current laser energy and side leakage. Hydrogen, nitrogen, and argon plasma waveguides up to 1.5 cm in length with a corrugation ...

Background Intra-ventricular pressure gradient along the direction of the outflow tract is generated by the impulse response of the myocardial contraction. This spatial pressure gradient, derived from the maximal acceleration estimates within flow along the left ventricular out flow tract (LVOT), has been validated in vitro by using MRI and was found strongly related to the inotropic state of t...