Analytical and experimental study of the ''gas buffer'' concept Final report, 23 Jun. 1967 - 22 Jan. 1968

Gas buffer concept for continuous piston gun used to launch intact projectil

Feasibility study of an explosive gun

Feasibility of high performance, explosively driven device, and calculations for deformable piston light gas gu

Concerted reductive coupling of an alkyl chloride at Pt(IV)

Oxidation of a doubly cyclometallated platinum(II) complex results in two isomeric platinum(IV) complexes. Whereas the trans isomer is robust, being manipulable in air at room temperature, the cis isomer decomposes at −20 °C and above. Reductive coupling of an alkyl chloride at the cis isomer gives a new species which can be reoxidised. The independence of this coupling on additional halide rules out the reverse of an SN2 reaction, leaving a concerted process as the only sensible reaction pathway

Studies in a transonic rotor aerodynamics and noise facility

The design, construction and testing of a transonic rotor aerodynamics and noise facility was undertaken, using a rotating arm blade element support technique. This approach provides a research capability intermediate between that of a stationary element in a moving flow and that of a complete rotating blade system, and permits the acoustic properties of blade tip elements to be studied in isolation. This approach is an inexpensive means of obtaining data at high subsonic and transonic tip speeds on the effect of variations in tip geometry. The facility may be suitable for research on broad band noise and discrete noise in addition to high-speed noise. Initial tests were conducted over the Mach number range 0.3 to 0.93 and confirmed the adequacy of the acoustic treatment used in the facility to avoid reflection from the enclosure

Understanding Health Risks for Adolescents in Protective Custody

Children in child welfare protective custody (e.g., foster care) are known to have increased health concerns compared to children not in protective custody. The poor health documented for children in protective custody persists well into adulthood; young adults who emancipate from protective custody report poorer health, lower quality of life, and increased health risk behaviors compared to young adults in the general population. This includes increased mental health concerns, substance use, sexually transmitted infections, unintended pregnancy, and HIV diagnosis. Identifying youth in protective custody with mental health concerns, chronic medical conditions, and increased health risk behaviors while they remain in custody would provide the opportunity to target prevention and intervention efforts to curtail poor health outcomes while youth are still connected to health and social services. This study leveraged linked electronic health records and child welfare administrative records for 351 youth ages 15 and older to identify young people in custody who were experiencing mental health conditions, chronic medical conditions, and health risk behaviors (e.g., substance use, sexual risk). Results indicate that 41.6% of youth have a mental health diagnosis, with depression and behavior disorders most common. Additionally, 41.3% of youth experience chronic medical conditions, primarily allergies, obesity, and vision and hearing concerns. Finally, 39.6% of youth use substances and 37.0% engage in risky sexual behaviors. Predictors of health risks were examined. Those findings indicate that women, those with longer lengths of stay and more times in custody, and those in independent living and conjugate care settings are at greatest risk for mental health conditions, chronic medical conditions, and health risk behaviors. Results suggest a need to ensure that youth remain connected to health and mental health safety nets, with particular attention needed for adolescents in care for longer and/or those placed in non-family style settings. Understanding who is at risk is critical for developing interventions and policies to target youth who are most vulnerable for increased health concerns that can be implemented while they are in custody and are available to receive services

“Arrows Fletched From Our Own Wings”: The Early Church Fathers and the “Delphi of the Mind”

Delphi, one of the most important sanctuaries of the classical world, presented the Early Church Fathers with an interesting challenge. Although it continued to be an institution of local importance, by their time, the Oracle had long since been a provincial backwater, requiring Imperial patronage, at times, which revived the sanctuary temporarily, but not to its former glory and importance. It was not the actual institution that presented hindrance to the advancement of Christianity, nevertheless the Early Church Fathers attacked it with arguments ranging from the irreverent to the obscene. The interesting fact is that none of these indictments were original to the Early Church Fathers: they were already found in the pagan (reverent or skeptical) literary tradition about the Delphic Oracle. The Early Church Fathers, then, assaulted the Delphic Oracle using the literary tradition that had developed around it (“the Delphi of the Mind”) rather than merely calling for the destruction of the physical site or institution of the Oracle (“the Delphi of Fact”), which they knew had fallen into obsolescence. To them, the Delphic literary tradition of the Classical and Hellenistic periods was a lever with which to extirpate a the deep roots of the Greco-Roman religion that had grown into minds of many of the ancients and had outlasted the seed from which they had grown, “the Delphi of Fact,” by several centuries. Their struggle was truly “not against flesh and blood”; it was against a tradition that was as real and living to the ancients