Encouraging Corporate Innovation for Our Homeland During the Best of Times for the Worst of Times: Extending Safety Act Protections to Natural Disasters’

This article first analyzes the innovative tort reform of the SAFETY Act and then argues for expansion of SAFETY Act type risk protection to natural disasters such as hurricanes, earthquakes and wildfires. The SAFETY Act was drafted to stimulate the development and deployment of technologies that combat terrorism by providing liability protection. Applying the same type of legislation to natural disasters will provide a commensurate benefit of encouraging preparedness and development of technologies that could mitigate harms resulting from natural disasters. The Department of Homeland Security voiced a desire to increase the use of the SAFETY Act by private industry. This article argues that one way to increase the utility of the SAFETY Act and provide more value for the American public is for Congress to extend SAFETY Act protections, by amendment or new legislation, to cover risk related to national catastrophes

Military Space Communications

A worldwide network of military communication satellites is now being deployed to function both as a long-haul strategic trunking system and as a system capable of supporting contingency operations. Another network is under development to handle voice and teletype messages between users with small mobile terminals. Other more specialized satellite systems are well along in the planning stage. This paper describes the evolving deployment and utilization of satellite-based systems and anticipates the trend in future operational capability

High-speed measurement of rotational anisotropy nonlinear optical harmonic generation using position sensitive detection

We present a method of performing high-speed rotational anisotropy nonlinear optical harmonic generation experiments at rotational frequencies of several hertz by projecting the harmonic light reflected at different angles from a sample onto a stationary position sensitive detector. The high rotational speed of the technique, $10^3$ to $10^4$ times larger than existing methods, permits precise measurements of the crystallographic and electronic symmetries of samples by averaging over low frequency laser power, beam pointing, and pulse width fluctuations. We demonstrate the sensitivity of our technique by resolving the bulk four-fold rotational symmetry of GaAs about its [001] axis using second harmonic generation

KINEMATIC AND TEMPORAL CHARACTERISfICS OF SELECTED JUDO HIP THROWS

The sport of judo, developed In 1882 in Japan by Jigoro Kano, is a refined version of the ancient martial art of jujitsu. Typically when one envisions martial arts, the mental image includes kicks, punches, and other striking techniques. The sport of judo involves none of these, but does permit the use of throwing techniques, mat work similar to wrestling, strangle holds and joint locks at the elbow. Despite its original role as a martial art, judo as practiced today is essentially the highest form of wrestling practiced anywhere in the world (Reay &Hobbs, 1979)

Lack of neuromuscular origins of adaptation after a long-term stretching program

pre-printContext: Static stretching is commonly used during the treatment and rehabilitation of orthopedic injuries to increase joint range of motion (ROM) and muscle flexibility. Understanding the physiological adaptations that occur in the neuromuscular system as a result of long-term stretching may provide insight into the mechanisms responsible for changes in flexibility. Objective: To examine possible neurological origins and adaptations in the Ia-reflex pathway that allow for increases in flexibility in ankle ROM, by evaluating the reduction in the synaptic transmission of Ia afferents to the motoneuron pool. Design: Repeated-measures, case-controlled study. Setting: Sports medicine research laboratory. Participants: 40 healthy volunteers with no history of cognitive impairment, neurological impairment, or lower extremity surgery or injury within the previous 12 mo. Intervention: Presynaptic and postsynaptic mechanisms were evaluated with a chronic stretching protocol. Twenty subjects stretched 5 times a wk for 6 wk. All subjects were measured at baseline, 3 wk, and 6 wk. Main Outcome Measures: Ankle-dorsiflexion ROM, Hmax:Mmax, presynaptic inhibition, and disynaptic reciprocal inhibition. Results: Only ROM had a significant interaction between group and time, whereas the other dependent variables did not show significant differences. The experimental group had significantly improved ROM from baseline to 3 wk (mean 6.2 ± 0.9, P < .001), 3 wk to 6 wk (mean 5.0 ± 0.8, P < .001), and baseline to 6 wk (mean 11.2 ±0.9, P < .001). Conclusions: Ankle dorsiflexion increased by 42.25% after 6 wk of static stretching, but no significant neurological changes resulted at any point of the study, contrasting current literature. Significant neuromuscular origins of adaptation do not exist in the Ia-reflex-pathway components after a long-term stretching program as currently understood. Thus, any increases in flexibility are the result of other factors, potentially mechanical changes or stretch tolerance

Enhanced heat capacity and a new temperature instability in superfluid He-4 in the presence of a constant heat flux near T-lambda

We present the first experimental evidence that the heat capacity of superfluid 4He, at temperatures very close to the lambda point Tλ, is enhanced by a constant heat flux Q. The heat capacity at constant Q, CQ, is predicted to diverge at a temperature Tc(Q)<Tλ at which superflow becomes unstable. In agreement with previous measurements, we find that dissipation enters our cell at a temperature, TDAS(Q), below the theoretical value, Tc(Q). We argue that TDAS(Q) can be accounted for by a temperature instability at the cell wall, and is therefore distinct from Tc(Q). The excess heat capacity we measure has the predicted scaling behavior as a function of T and Q, but it is much larger than predicted by current theory

TIME-OF-FLIGHT STUDIES OF ELECTRONS IN VACUUM

An electron gun, drift tube, and fast amplifier (described) were designed and tested as part of a time-offlight electron beam monochromator. Drift time distributions were obtained for electrons of mean energy from 3 to 15 ev, which required mean transit times from 800 to 350 nsec, respectively, with the latter minimum value corresponding to the effects of amplifier rise time and pulse width from the avalanche transistor pulser. The former value corresponds to an electron energy spread from the electron gun of about 0.6 ev. The reciprocal of the square of the transit time is a linear function of the electron gun accelerating potential with an intercept at -- 1.5 v attributed to contact potentials. Beam attenuation due to scattering off of residual gas in the vacuum system indicated that pressures below 10/sup -6/ mm Hg are required in order to avoid loss of electrons in drift distances of the order of one meter. (auth