Acute Ulnar Neurapraxia and Carpal Tunnel Syndrome in the Context of a Distal Radius Fracture.

Distal radius fractures, carpal tunnel syndrome, and ulnar nerve compression are common causes of symptoms that result in patients presenting for hand evaluation. This is a unique case of a distal radius fracture leading to both carpal tunnel syndrome and ulnar nerve compression requiring urgent operative management.

Coherent Optical Signatures of Electron Microbunching in Laser-Driven Plasma Accelerators.

We report observations of coherent optical transition radiation interferometry (COTRI) patterns generated by microbunched ∼200-MeV electrons as they emerge from a laser-driven plasma accelerator. The divergence of the microbunched portion of electrons, deduced by comparison to a COTRI model, is ∼9× smaller than the ∼3  mrad ensemble beam divergence, while the radius of the microbunched beam, obtained from COTR images on the same shot, is <3  μm. The combined results show that the microbunched distribution has estimated transverse normalized emittance ∼0.

First point-spread function and x-ray phase-contrast imaging results with an 88-mm diameter single crystal.

In this study, we report initial demonstrations of the use of single crystals in indirect x-ray imaging with a benchtop implementation of propagation-based x-ray phase-contrast imaging. Based on single Gaussian peak fits to the x-ray images, we observed a four times smaller system point-spread function (PSF) with the 50-µm thick single crystal scintillators than with the reference polycrystalline phosphor/scintillator. Fiber-optic plate depth-of-focus and Al reflective-coating aspects are also elucidated.

Promoting physical activity using a wearable activity tracker in college students: A cluster randomized controlled trial.

This study examined the effects of utilizing a wearable activity tracker in a credit-based physical activity instructional program (PAIP) for promoting physical activity (PA) in college students. Fourteen PAIP courses in a large public university were randomly assigned into intervention (k = 7; n = 101) and control (k = 7; n = 86) groups. All courses focused on a core curriculum that covers basic exercise and behavioral science contents through lectures and activity sessions.

Demonstration of a real-time interferometer as a bunch-length monitor in a high-current electron beam accelerator.

A real-time interferometer (RTI) has been developed to monitor the bunch length of an electron beam in an accelerator. The RTI employs spatial autocorrelation, reflective optics, and a fast response pyro-detector array to obtain a real-time autocorrelation trace of the coherent radiation from an electron beam thus providing the possibility of online bunch-length diagnostics. A complete RTI system has been commissioned at the A0 photoinjector facility to measure sub-mm bunches at 13 MeV.