Water-filled heat pipe useful at moderate temperatures

Heat pipe is used in the primary heat exchanger for nuclear power plants, as a heat sink for high-power electronic devices, and in a closed-cycle heat rejection mechanism for cryogenic storage tanks. It serves simultaneously as a heat transfer device and as a structural member

Experimental Research on 4-Duct Tandem VTOL Aircraft Configurations

This paper presents a brief summary of several wind-tunnel investigations conducted at the Langley Research Center of the NASA to study the aerodynamic and stability and control characteristics of several VTOL aircraft configurations powered by four tilting ducted propellers arranged in tandem pairs. Specifically the two rear ducts could be mounted close alongside the upper rear portion of the fuselage with small wing panels attached to the outboard side of the ducts or could be mounted outboard on the tips of a small wing located high on the rear portion of the fuselage. The two front ducts were always mounted close inboard on the forward part of the fuselage and could be mounted either in a high or low position on the fuselage. The results of the investigation indicated that aircraft of this type could have acceptable aerodynamic and static longitudinal and lateral stability and control characteristics in both transition and normal cruise flight except for the possible qualification that the lateral force due to sideslip is abnormally high and might cause the aircraft to be too sensitive to side gusts

EXPERIMENTAL PANEL FLUTTER RESULTS FOR SOME FLAT AND CURVED TITANIUM SKIN PANELS AT SUPERSONIC SPEEDS

Panel flutter results for flat and curved titanium skin panels at supersonic spee

Reliable, self-calibrating vibration transducer

Transducer system measures the uniaxial vibration amplitudes /deflections/ and frequency of a body subjected to mechanical vibration. The basic system is self-calibrating and provides an output which unambiguously indicates the direction as well as the magnitude of the uniaxial deflections

Low-speed static wind-tunnel investigation of a half-span fuselage and variable sweep pressure wing model

Low speed static wind tunnel tests of half-span fuselage and variable sweep pressure wing mode

Life test, 8000-hour, of an electron bombardment mercury ion thruster system for SERT 2 Final report

Operational performance of electron bombardment mercury ion thruster system during life testing in space simulation for SERT

Inducer dynamics full-flow, full-admission hydraulic turbine drive Interim report for tasks 1, 2, and 3

Hydrodynamical and mechanical design layout for two-speed hydraulic turbine inducer, computer simulation of pumping system and test facility performance, and study of demonstration uni

COVID-19 Pandemic and Disability: Essential Considerations

People with disabilities have greater healthcare needs and are more likely to experience poor health, however, their access to healthcare remains compromised compared to people without disabilities. Despite this well recognised need, people with disabilities often face  barriers to accessing healthcare and they face additional risks to their well-being, because of the ongoing COVID-19 pandemic. In this paper, we posit that people with disabilities are vulnerable in the context of the COVID-19 pandemic. We demonstrate this vulnerability through briefly highlighting eight key considerations, as they relate to disability and COVID-19. We conclude that both inaccessible healthcare systems and the presence of underlying health conditions put people with disabilities at additional risk. Further, vulnerability to severe illness and death, post-contracting COVID-19, is exacerbated by the interaction between impairments and personal and environmental barriers existing at different levels, resulting in a disproportionately negative impact for people with disabilities. It is thus not sufficient to look only at underlying medical conditions as an indicator of risk for contracting COVID-19. Additionally, the challenge posed by not routinely collecting data on disability renders potential difficulties in linking disability to COVID-19 deaths/infections. More research is needed on disability and COVID-19 to inform disability-inclusive pandemic responses