Eighth DOD/NASA/FAA Conference on Fibrous Composites in Structural Design, Part 2

Papers presented at the conference are compiled. The conference provided a forum for the scientific community to exchange composite structures design information and an opportunity to observe recent progress in composite structures design and technology. Part 2 contains papers related to the following subject areas: the application in design; methodology in design; and reliability in design

Temperature dependent asymmetry of the nonlocal spin-injection resistance: evidence for spin non-conserving interface scattering

We report nonlocal spin injection and detection experiments on mesoscopic Co-Al2O3-Cu spin valves. We have observed a temperature dependent asymmetry in the nonlocal resistance between parallel and antiparallel configurations of the magnetic injector and detector. This strongly supports the existence of a nonequilibrium resistance that depends on the relative orientation of the detector magnetization and the nonequilibrium magnetization in the normal metal providing evidence for increasing interface spin scattering with temperature.Comment: 5 pages, 4 figures, accepted for publication in PRL, minor corrections (affiliation, acknowledgements, typo

How Physicians Feel About Assisting Female Victims of Intimate-Partner Violence

Purpose. To assess the feelings of physicians about assisting female victims of intimate-partner violence (IPV), and to examine factors related to positive and negative feelings about assisting victims of IPV. Method. In 1998, a total site sample of 150 physicians practicing in a large general hospital in the area of Virginia Beach, Virginia, was surveyed by questionnaire via the mail. Four specialties were represented: emergency medicine, family practice, obstetrics-gynecology, and psychiatry. The questionnaire asked about medical training and training in assisting victims of IPV The physicians\u27 feelings about working with victims of IPV were measured on a nine-item, five-point semantic differential scale. Results. A total of 76 physicians responded to the questionnaire (response rate=51%). Only a minority (11%) had overall positive feeling scores about assisting victims of IPV While most physicians reported that it was significant work, the great majority also felt that it was difficult, low-paying, and stressful. Training in assisting victims of IPV, in medical school or afterwards, did not appear to influence feelings about assisting victims of IPV However, physicians who were white and who were married (the majority of the respondents) were significantly more likely than the other respondents to feel negatively about providing services to victims of IPV. Conclusion. Graduate medical education and training programs need to address the association of negative feelings with helping women harmed by IPV, because these feelings may interfere with the appropriate screening, referral, and treatment of these victims

Low frequency noise characteristics of sub-micron magnetic tunnel junctions

We report that low frequency (up to 200 kHz) noise spectra of magnetic tunnel junctions with areas ~10^{-10}cm^2$ at 10 Kelvin deviate significantly from the typical 1/f behavior found in large area junctions at room temperature. In most cases, a Lorentzian-like shape with characteristic time between 0.1 and 10 ms is observed, which indicates only a small number of fluctuators contribute to the measured noise. By investigating the dependence of noise on both the magnitude and orientation of an applied magnetic field, we find that magnetization fluctuations in both free and reference layers are the main sources of noise in these devices. At small fields, where the noise from the free layer is dominant, a linear relation between the measured noise and angular magnetoresistance susceptibility can be established.Comment: 3 pages, 2 figure