Jared C. Workman

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A pelvic position has been sought that optimizes abdominal muscle activation while diminishing hip flexor activation. Thus, the objective of the study was to investigate the effect of pelvic position and the Janda sit-up on trunk muscle activation. Sixteen male volunteers underwent electromyographic (EMG) testing of their abdominal and hip flexor muscles(More)
Relativistic electrons moving into a highly tangled magnetic field emit jitter radiation. We present a detailed computation of the jitter radiation spectrum for electrons inside Weibel shock generated magnetic fields, including self-absorption. We apply our results to the case of the prompt and afterglow emission of gamma-ray bursts. We show that jitter(More)
The standard model of GRB afterglows assumes that the radiation observed as a delayed emission is of synchrotron origin, which requires the shock magnetic field to be relatively homogeneous on small scales. An alternative mechanism – jitter radiation, which traditionally has been applied to the prompt emission – substitutes synchrotron when the magnetic(More)
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