Diffusion bonding of IN 718 to VM 350 grade maraging steel

Diffusion bonding studies have been conducted on IN 718, VM 350 and the dissimilar alloy couple, IN 718 to maraging steel. The experimental processing parameters critical to obtaining consistently good diffusion bonds between IN 718 and VM 350 were determined. Interrelationships between temperature, pressure and surface preparation were explored for short bending intervals under vacuum conditions. Successful joining was achieved for a range of bonding cycle temperatures, pressures and surface preparations. The strength of the weaker parent material was used as a criterion for a successful tensile test of the heat treated bond. Studies of VM-350/VM-350 couples in the as-bonded condition showed a greater yielding and failure outside the bond region

The turntable as a musical instrument and the emergence of the concert turntablist

The turntable played a significant role in the evolution of 20th century Western music, both as a recording/playback device, and as a musical instrument in its own right. The focus of this thesis is my original compositions that feature the turntable and the history of the turntable as a musical instrument. The 20th century delivered significant progress in turntable technology, but produced limited innovation for the turntable in new music composition. Except for a few outliers, the same techniques for the turntable have been recycled among experimental composers, sound artists and pop music producers since the 1930’s. This thesis embraces those techniques from the past, and moves forward to explore new potential for the turntable. My original folio of work featuring the turntable is informed by my research into: (1) conceptual barriers to understanding the turntable as an instrument (2) turntable notation (3) amplification options (4) public opinion of the turntable in the concert hall (5) original turntable techniques as well as my adaptation of existing techniques (6) composers who embraced the turntable-as-instrument

The turntable as a musical instrument and the emergence of the concert turntablist

The turntable played a significant role in the evolution of 20th century Western music, both as a recording/playback device, and as a musical instrument in its own right. The focus of this thesis is my original compositions that feature the turntable and the history of the turntable as a musical instrument. The 20th century delivered significant progress in turntable technology, but produced limited innovation for the turntable in new music composition. Except for a few outliers, the same techniques for the turntable have been recycled among experimental composers, sound artists and pop music producers since the 1930’s. This thesis embraces those techniques from the past, and moves forward to explore new potential for the turntable. My original folio of work featuring the turntable is informed by my research into: (1) conceptual barriers to understanding the turntable as an instrument (2) turntable notation (3) amplification options (4) public opinion of the turntable in the concert hall (5) original turntable techniques as well as my adaptation of existing techniques (6) composers who embraced the turntable-as-instrument

Airspace Technology Demonstration 3 (ATD-3): Dynamic Routes for Arrivals in Weather (DRAW) Technology Transfer Document Summary Version 2.0

Airspace Technology Demonstration 3 (ATD-3) is part of NASAs Airspace Operations and Safety Program (AOSP) specifically, its Airspace Technology Demonstrations (ATD) Project. ATD-3 is a multi-year research and development effort which proposes to develop and demonstrate automation technologies and operating concepts that enable air navigation service providers and airspace users to continuously assess weather, winds, traffic, and other information to identify, evaluate, and implement workable opportunities for flight plan route corrections that can result in significant flight time and fuel savings in en route airspace. In order to ensure that the products of this tech-transfer are relevant and useful, NASA has created strong partnerships with the FAA and key industry stakeholders. This summary document and accompanying technology artifacts satisfy the third Research Transition Product (RTP) defined in the Applied Traffic Flow Management (ATFM) Research Transition Team (RTT) Plan, which is Dynamic Routes for Arrivals in Weather (DRAW). This technology transfer consists of artifacts for DRAW Arrival Metering (AM) Operations delivered in June 2018, DRAW AM updates, and DRAW Extended Metering (XM) Operations. Blue highlighting indicates the new or modified deliverables. Some of the artifacts in this technology transfer have distribution restrictions that need to be followed. Distribution information is noted in each section. DRAW is a trajectory-based system that combines the legacy Dynamic Weather Routes (DWR) weather avoidance technology with an arrival-specific rerouting algorithm and arrival scheduler to improve traffic flows on weather-impacted arrival routes into major airports. First, DRAW identifies flights that could be rerouted to more efficient Standard Terminal Arrival Routes (STARs) that may have previously been impacted by weather. Second, when weather is impacting the arrival routing, DRAW proposes simple arrival route corrections that enable aircraft to stay on their flight plan while avoiding weather. The DRAW system proposes reroutes early enough to allow Time Based Flow Management (TBFM) to make the necessary schedule adjustments. As a result, metering operations can be sustained longer and more consistently in the presence of weather because the arrival schedule accounts for the dynamic routing intent of arrival flights to deviate around weather. The first DRAW tech transfer in June 2018 focused on arrival metering operations with the DRAW algorithm implemented in the NASA Center TRACON Automation System (CTAS) automation software. This tech transfer delivery includes updates for DRAW implemented in FAAs TBFM 4.7 automation software and preliminary research into DRAW for XM operations

The question of authorship of Christine de Pisan\u27s war manual, Le livre des fais d\u27armes et de chevalerie

The works of Christine de Pizan and their treatment over the centuries since her death serve as an excellent example of the changing nature of criticism and how critical approaches to literature are adapted to suit the needs of different ages. This appears to have been the case in the critical history of Christine\u27s war manual, Le livre des fais d\u27armes et de chevalerie or, in Caxton\u27s English, The Book of the Faytes of Armes and Chivalrye

Fear information and the development of fears during childhood: effects on implicit fear responses and behavioural avoidance

Field, Argyris and Knowles (Behav Res Ther 39 (2001) 1259), and Field, Hamilton, Knowles and Plews (Behav Res Thera 41 (2003) 113) have developed a prospective paradigm for testing Rachman’s (Behav Res Ther 15 (1977) 375) proposition that fear information is important in the development of fears and phobias in children. Despite this paradigm being an advance on retrospective reports, the research so far has been restricted to self-reported fear beliefs measured after the information is given. This gives rise to two possible shortcomings: (1) the effects could simply reflect demand characteristics resulting from children conforming to the experimental demands, and (2) although fear information changes beliefs, this might not translate into the behavioural change that would be expected if this information has a powerful effect relevant to the development of pathological fear. This paper describes an experiment that attempts to address these concerns by improving Field et al.’s (2001, 2003) basic paradigm but with the addition of two measures: (1) a behavioural measure of avoidance, and (2) an implicit attitude task that should not be susceptible to deliberate attempts to conform to experimental demands. The result showed that negative and positive information have dramatic, and opposite, effects on self-reported fear beliefs, behavioural avoidance and implicit attitudes. There were no effects of gender on any of these results. This study fully supports Rachman’s model and suggests that past work does not merely reflect demand characteristics and that fear information increases behavioural avoidance as well as fear beliefs

Shuttle/TDRSS modelling and link simulation study

A Shuttle/TDRSS S-band and Ku-band link simulation package called LinCsim was developed for the evaluation of link performance for specific Shuttle signal designs. The link models were described in detail and the transmitter distortion parameters or user constraints were carefully defined. The overall link degradation (excluding hardware degradations) relative to an ideal BPSK channel were given for various sets of user constraint values. The performance sensitivity to each individual user constraint was then illustrated. The effect of excessive Spacelab clock jitter on the return link BER performance was also investigated as was the problem of subcarrier recovery for the K-band Shuttle return link signal