Post-traumatic stress disorder (PTSD) is a serious mental illness that affects current and former military service members at a disproportionately higher rate than the civilian population. Prior studies have shown that PTSD symptoms follow multiple trajectories in civilians and military personnel. The current study examines whether the trajectories of PTSD symptoms of veterans separated from th...

Energy efficiency dominates practically every aspect of the design of a wireless sensor network and duty cycling is an important tool for achieving high energy efficiencies. Duty cycling for wireless camera networks meant for tracking objects is made complex by the nodes having to anticipate the arrival of the objects in their field-of-view. The consequences of an object arriving in the view-re...

the direct torque control (dtc) of interior permanent magnet synchronous motor (ipmsm) offers simple structure and fast torque response. the conventional switching table-based dtc (st-dtc) presents some disadvantages like high torque and flux ripple and also variable switching frequency. this paper investigates the improved st-dtc strategies to reduce both torque and flux ripple in dtc of ipmsm...

BACKGROUND Physicians' mental health may be adversely affected by the number of days of work and time spent on-call, and improved by sleep and days-off. The aim of this study was to determine the associations of depressive symptoms with taking days of off duty, hours of sleep, and the number of days of on-call and overnight work among physicians working in Japanese hospitals. METHODS A cross-...

ing more compassionate, more effective family physicians;” in fact, only 0.8% believed this would occur. In July 2011, the ACGME’s revised duty hour rules went into effect, in part based on voluminous research into the effects of fatigue and sleep deprivation on performance, but also due to external political pressures that forced the ACGME to take action and try to preserve the vestiges of a p...

OBJECTIVE To test the hypotheses that sleep deprivation in neurology residents is associated with performance deficits and that vigilance and cognitive performance is more compromised after overnight on-call duty compared to night shift. METHODS Thirty-eight neurology residents of a university teaching hospital participated in a prospective single-blind comparison study. Residents were recrui...

Wireless Sensor Networks (WSNs) are comprised of autonomous, self-organized sensors that collaborate to monitor surrounding conditions, such as temperature, motion, sound and vibration. The data collected by sensors are then forwarded to a base station or sink via multiple hops. A key challenge in WSNs is that sensor nodes are constrained by their physical size and battery capacity. As a result...

BACKGROUND Extended duty hours for residents are associated with negative consequences. Strategies to accommodate duty hour restrictions may also have unintended impacts. To eliminate extended duty hours and potentially lessen these impacts, we developed a senior resident rotation bundle that integrates a night float system, educational sessions on sleep hygiene, an electronic handover tool, an...

A wide-range all-digital duty-cycle corrector (ADDCC) with output clock phase alignment is presented in this paper. The proposed ADDCC can correct the duty-cycle error of the input clock to 50% duty-cycle. The acceptable duty-cycle range and frequency range of input clock is from 20% to 80% and from 250MHz to 1GHz, respectively. The proposed ADDCC is implemented on a standard performance 65 nm ...