Progress in coherent laser radar

Considerable progress with coherent laser radar has been made over the last few years, most notably perhaps in the available range of high performance devices and components and the confidence with which systems may now be taken into the field for prolonged periods of operation. Some of this increasing maturity was evident at the 3rd Topical Meeting on Coherent Laser Radar: Technology and Applications. Topics included in discussions were: mesoscale wind fields, nocturnal valley drainage and clear air down bursts; airborne Doppler lidar studies and comparison of ground and airborne wind measurement; wind measurement over the sea for comparison with satellite borne microwave sensors; transport of wake vortices at airfield; coherent DIAL methods; a newly assembled Nd-YAG coherent lidar system; backscatter profiles in the atmosphere and wavelength dependence over the 9 to 11 micrometer region; beam propagation; rock and soil classification with an airborne 4-laser system; technology of a global wind profiling system; target calibration; ranging and imaging with coherent pulsed and CW system; signal fluctuations and speckle. Some of these activities are briefly reviewed

Preparing new librarians for career and organizational impact

The purpose of this case study is to report on the activities and outcomes of a facilitated group of new librarians in one Australian university. The aims of the librarians are to increase professional networking, to promote career development, to enhance job satisfaction and retention of motivated staff, to grow participants' sense of responsibility for organisational progress, and to develop willingness to take initiative in presenting good ideas for service improvement

Preparing new librarians for career and organizational impact

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Development of autoclavable addition type polyimides

Two highly promising approaches to yield autoclavable addition-type polyimides were identified and evaluated in the program. Conditions were established for autoclave preparation of Hercules HMS graphite fiber reinforced composites in the temperature range of 473 K to 505 K under an applied pressure of 0.7 MN/m2 (100 psi) for time durations up to four hours. Upon oven postcure in air at 589 K, composite samples demonstrated high mechanical property retention at 561 K after isothermal aging in air for 1000 hours. Promise was shown for shorter term mechanical property retention at 589 K upon exposure in air at this temperature

Development of autoclavable polyimides

A poly(Diels-Alder) (PDA) resin approach was investigated as a means to achieve autoclavability of high temperature resistant resin/fiber composites under mild fabrication procedures. Low void content Type A-S graphite reinforced composites were autoclave fabricated from a PDA resin/fiber prepared from an acetone:methanol:dioxane varnish. Autoclave conditions were 477K (400F) and 0.7 MN/sq m (100 psi) for up to two hours duration. After postcure at temperatures up to 589K (600F), the composites demonstrated high initial mechanical properties at temperatures up to 561K (550F). The results from isothermal aging studies in air for 1000 hours indicated potential for long-term ( 1000 hours) use at 533K (500F) and shorter-term (up to 1000 hours) at 561K (550F)

Development of autoclave moldable addition-type polyimides

Chemistry and processing modifications of the poly(Diels Alder) polyimide (PDA) resin were performed to obtain structural composites suitable for 589 K (600 F) service. This work demonstrated that the PDA resin formulation is suitable for service at 589 K (600 F) for up to 125 hours when used in combination with Hercules HTS graphite fiber. Sandwich panels were autoclave molded using PDA/HTS skins and polyimide/glass honeycomb core. Excellent adhesion between honeycomb core and the facing skins was demonstrated. Fabrication ease was demonstrated by autoclave molding three-quarter scale YF-12 wing panels

Leaving Home Care: Decision Making, Risk Scenarios & Services Gaps in the Home Care System

Home and community-based services (HCBS) enable older and disabled adults to age-in-place in their homes and communities by helping them function independently for as long as possible (Grabowski et al., 2010; Wong & Silverstein, 2011). Previous studies well document that older adults prefer receiving HCBS rather than institutional care at a nursing home (e.g., Walker, 2010; Fox-Grage, Coleman, & Freiman, 2006). Medicaid is a major source of funding for long-term care. Currently, a large proportion of Medicaid funds in most states has been spent on institutional care (National Conference of State Legislatures & AARP, 2009), and older adults and their families have relied on nursing homes to be the provider of long-term care (Miller, Allen, & Mor, 2009). The purpose of this research is to provide additional insights to policy decision makers on the need to rebalance long-term care spending in Massachusetts by further exploring the reasons elder clients are terminated from home- and community-based care. Care managers are key personnel in providing HCBS to elder clients and have unique insights regarding HCBS. This study builds on qualitative research conducted by Wong and Silverstein (2011) by further exploring the themes that emerged from the previous study related to termination triggers, gaps in HCBS, and the identification and roles of key decision makers in the termination process. In addition, this study examined risk scenarios that may trigger discharge from home- and community-based care programs into institutional settings

Variable iron-line emission near the black hole of Markarian 766

We investigate the link between ionised Fe X-ray line emission and continuum emission in the bright nearby AGN, Mrk 766. A new long (433 ks) XMM-Newton observation is analysed, together with archival data from 2000 and 2001. The contribution from ionised line emission is measured and its time variations on short (5-20 ks) timescales are correlated with the continuum emission. The ionised line flux is found to be highly variable and to be strongly correlated with the continuum flux, demonstrating an origin for the ionised line emission that is co-located with the continuum emission. Most likely the emission is ionised reflection from the accretion disc within a few A.U. of the central black hole, and its detection marks the first time that such an origin has been identified other than by fitting to spectral line profiles. Future observations may be able to measure a time lag and hence achieve reverberation mapping of AGN at X-ray energies.Comment: Accepted for publication, Astronomy and Astrophysics letter