Electrosonics Medical

his was a collaborative effort between Lawrence Livermore National Security, LLC as manager and operator of Lawrence Livermore National Laboratory (LLNL) and ElectroSonics Medical Inc. (formerly known as BIOMEC, Inc.), to develop a non-invasive pneumothorax detector based upon the micropower impulse radar technology invented at LLNL. Under a Work for Others Subcontract (L-9248), LLNL and ElectroSonics successfully demonstrated the feasibility of a novel device for non-invasive detection of pneumothorax for emergency and long-term monitoring. The device is based on Micropower Impulse Radar (MIR) Ultra Wideband (UWB) technology. Phase I experimental results were promising, showing that a pneumothorax volume even as small as 30 ml was clearly detectable from the MIR signals.

The problem and the solution. This concluding article presents a praxis-based reflection on the applied role of work meaning, its academic research, and the articles presented in this issue. Focusing on issues of convergence and divergence of meaning and the organizational leadership challenges in a global economic and business environment, the article addresses meaning of working issues in human resource development (HRD) and talent management practice. It further explains the role of meaning of working as an important component of professional development in HRD and identifies areas for further research and scholarship.

Seatbelts provide substantial benefits in rollover crashes, yet occupants still receive head and neck injuries from contacting the vehicle roof interior when the roof exterior strikes the ground. Prior research has evaluated rollover restraint performance utilizing anthropomorphic test devices (dummies), but little dynamic testing has been done with human volunteers to learn how they move during rollovers. In this study, the vertical excursion of the head of restrained dummies and human subjects was measured in a vehicle being rotated about its longitudinal roll axis at roll rates from 180-to-360 deg/sec and under static inversion conditions. The vehicle's restraint design was the commonly used 3-point seatbelt with continuous loop webbing and a sliding latch plate. This paper presents an analysis of the observed occupant motion and provides a comparison of dummy and human motion under similar test conditions. Thirty-five tests (eighteen static and seventeen dynamic) were completed using two different sizes of dummies and human subjects in both near and far-side roll directions. The research indicates that far-side rollovers cause the restrained test subjects to have greater head excursion than near-side rollovers, and that static inversion testing underestimates head excursion for far-side occupants. Human vertical head excursion of up to 200 mm was found at a roll rate of 220 deg/sec. Humans exhibit greater variability in head excursion in comparison to dummies. Transfer of seatbelt webbing through the latch plate did not correlate directly with differences in head excursion.

Grey Box Adaptive Control (GBAC), the use of parameter constrained identification with adaptive control, was compared against standard black box adaptive control (BBAC) for the automated infusion of sodium nitroprusside (SNP) to lower and regulate mean arterial blood pressure (MAP). Using a benchmark cardiovascular model, tests compared the controllers for a healthy simulated patient under 5 noise and anesthesia levels, and during sudden acute heart failure. In the challenging cases, GBAC significantly (p<0.05) outperformed BBAC in almost all performance measures. In all other cases, there were minimal differences. These results indicate that, when needed, GBAC rejected disturbances better, infused a smoother drug rate, reduced the total amount of drug, and generated a smaller MAP variation than BBAC.