An investigation of rotating stall in a single stage axial compressor

May 1955Thesis written jointly by both authors: Thesis (M.S.)--Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1955Includes bibliographical referencesThe rotating stall characteristics of a single stage axial flow compressor were investigated. The number of stall cells and their propagation velocities were found with and without stator blades. The measured velocities were compared with those predicted by Stenning's theory, assuming the downstream pressure fluctuations to be negligible, and correlation within 25% was obtained over a wide range of stall patterns. It was found that the pressure fluctuations caused by rotating stall were less downstream of the rotor than upstream; the minimum reduction across the rotor was 40% with stator blades, and 75% without stator blades. It was also found that, for the compressor tested, the stator blades decreased, the number of stall cells and tended to induce rotating stall at larger mass flow rates.National Advisory Committee for Aeronautics Contract NAw - 6375Project D.I.C. 724

AWAKENING ACTIVISM: THE POLITICAL PSYCHOLOGY OF INTERNATIONAL HUMAN RIGHTS

Individuals are an integral part of international human rights. While central to our leading theories of human rights change and to the efforts of human rights organizations in the real world, empirical scholarship has not systematically investigated how individuals choose to become advocates. Without the mobilization of individuals, human rights institutions and campaigns are deprived of the energy and material that fuel their success. In this dissertation, I closely evaluate the reasons why individuals choose to become engaged in human rights campaigns, what drives them to advocacy, and what this tells us about the relationship between political psychology and international human rights. In Chapter 1, I consider how incidental emotions influence individuals’ support for child hunger relief and refugee assistance, finding that negative emotions like disgust tend to amplify pre-existing views. In Chapter 2, I evaluate the effects of the negativity bias and loss-aversion bias on support for child hunger relief. I find that the combination of negative imagery and gains-focused messaging had a significant and positive effect on individuals’ support for both personal and government action to help feed and house the hungry. In Chapter 3, I discuss the important effects that political ideology had on the relationships I observed in Chapters 1 and 2. I illustrate how those on the political left and right responded in systematically different ways in each of the experiments, and note how these differences reveal the critical importance of targeted messaging with an emphasis on ideology. Finally, I conclude with a discussion of these dissertation findings as theoretically important and practically useful, with an emphasis on a focused and practically-oriented future research agenda