Thermal/structural analyses of several hydrogen-cooled leading-edge concepts for hypersonic flight vehicles

The aerodynamic heating at high flight Mach numbers, when shock interference heating is included, can be extremely high and can exceed the capability of most conventional metallic and potential ceramic materials available. Numerical analyses of the heat transfer and thermal stresses are performed on three actively cooled leading-edge geometries (models) made of three different materials to address the issue of survivability in a hostile environment. These analyses show a mixture of results from one configuration to the next. Results for each configuration are presented and discussed. Combinations of enhanced internal film coefficients and high material thermal conductivity of copper and tungsten are predicted to maintain the maximum wall temperature for each concept within acceptable operating limits. The exception is the TD nickel material which is predicted to melt for most cases. The wide range of internal impingement film coefficients (based on correlations) for these conditions can lead to a significant uncertainty in expected leading-edge wall temperatures. The equivalent plastic strain, inherent in each configuration which results from the high thermal gradients, indicates a need for further cyclic analysis to determine component life

Remarks of Gillian E. Metzger

Thanks for having me, I\u27m glad to be here. I\u27m going to take for granted the principle that candor and transparency in judicial reasoning is a very good thing. The process of judicial decision making is a process of giving reasoned explanations, of holding up reasons and arguments for refutation. Whether adjudication turns mainly on such reason giving or instead on judicial policy preferences is of course a matter of some dispute, but I think it is relatively noncontentious to say that reason giving is both an important constituent of, and an important constraint on, the process of adjudication – particularly constitutional adjudication. And it follows that candor about these reasons – about what\u27s really driving a judicial decision – is important. Such candor is particularly important in regard to precedent, because another important constraint in the area of constitutional adjudication is the need to take seriously decisions that courts, both yours and others, have previously issued

Vanessa Naisha v. Dana Metzger

USDC for the District of Delawar

Humanism in the Age of COVID-19: Renewing Focus on Communication and Compassion

The global COVID-19 pandemic has become one of the largest clinical and operational challenges faced by emergency medicine, and our EDs continue to see increased volumes of infected patients, many of whom are not only ill, but acutely aware and fearful of their circumstances and potential mortality. Given this, there may be no more important time to focus on staff-patient communication and expression of compassion.However, many of the techniques usually employed by emergency clinicians to provide comfort to patients and their families are made more challenging or impossible by the current circumstances. Geriatric ED patients, who are at increased risk of severe disease, are particularly vulnerable to the effects of isolation.Despite many challenges, emergency clinicians have at their disposal a myriad of tools that can still be used to express compassion and empathy to their patients. Placing emphasis on using these techniques to maximize humanism in the care of COVID-19 patients during this crisis has the potential to bring improvements to ED patient care well after this pandemic has passed

Vol. 12, No. 6, March 16, 1962

•Jones-McBride - Brooks-Metzger Gain Campbell Finals •G.C. of Federal Power Commission and Labor Bill Author Will be Speakers •Fresh News???? - Of Moot Court Team •Photo Book Underway •Lounge Shaping Up •Fraternity Flashes •At the Flick

Vol. 12, No. 6, March 16, 1962

•Jones-McBride - Brooks-Metzger Gain Campbell Finals •G.C. of Federal Power Commission and Labor Bill Author Will be Speakers •Fresh News???? - Of Moot Court Team •Photo Book Underway •Lounge Shaping Up •Fraternity Flashes •At the Flick