Real-time simulation of the TF30-P-3 turbofan engine using a hybrid computer

A real-time, hybrid-computer simulation of the TF30-P-3 turbofan engine was developed. The simulation was primarily analog in nature but used the digital portion of the hybrid computer to perform bivariate function generation associated with the performance of the engine's rotating components. FORTRAN listings and analog patching diagrams are provided. The hybrid simulation was controlled by a digital computer programmed to simulate the engine's standard hydromechanical control. Both steady-state and dynamic data obtained from the digitally controlled engine simulation are presented. Hybrid simulation data are compared with data obtained from a digital simulation provided by the engine manufacturer. The comparisons indicate that the real-time hybrid simulation adequately matches the baseline digital simulation

The British and German Presses in the Age of Empire

This is an exploration of the effects of the press on British and German foreign policy between 1876 and 1906. The dissertation considers the growing influence of the press on Anglo-German relations. Historians have provided discussions of how domestic presses can affect their home governments. This dissertation adds to that by analyzing the consequences of the debates between the British and German presses on their governments’ foreign policy. The possibility for Anglo-German cooperation during the late nineteenth and early twentieth centuries receives significant interest due to debates regarding the origins of World War I. The reasons put forth by historians for the inability to conclude an Anglo-German agreement despite similar interests during this period include the volatility of Wilhelm II’s personality, the growth of the German navy, and the expansion of the German empire. I add to this discussion by analyzing how the British and German presses’ opinions increasingly inhibited Anglo-German diplomacy. In this analysis, I use six journals, representing the ‘official’ (London Times, Kölnische Zeitung), ‘semi-official’ (Pall Mall Gazette, Norddeutsche Allgemeine Zeitung), and satirical (Punch, Kladderadatsch) segments of the British and German presses. I begin with a discussion of the two presses during the Near East Crisis (1876- 1878). During this period, the presses expressed growing interest in international affairs, prompting more concerns with how their governments dealt with other Great Powers. Following this discussion, I consider the effects of colonial competition in Africa between 1878 and 1896 on the diplomatic relations of Great Britain, France, and Germany. This is necessary to establish the background for the final section of the dissertation. The last part of the dissertation explores the British and German presses’ responses to each other between the Jameson Raid and the Algeciras Conference. It is during this later period, when British and German imperial interests conflicted, and when the Russian threat dissolved for Great Britain, that the final efforts for rapprochement between the two governments failed, leading to permanent estrangement. The British and German presses had a significant role in causing this separation, by using their articles to expand the distrust already existent between their governments

Study of turbojet combustor dynamics using sweep-frequency data

Sweep frequency nozzle pressure oscillation effects on turbojet combustor dynamic

A lumped parameter mathematical model for simulation of subsonic wind tunnels

Equations for a lumped parameter mathematical model of a subsonic wind tunnel circuit are presented. The equation state variables are internal energy, density, and mass flow rate. The circuit model is structured to allow for integration and analysis of tunnel subsystem models which provide functions such as control of altitude pressure and temperature. Thus the model provides a useful tool for investigating the transient behavior of the tunnel and control requirements. The model was applied to the proposed NASA Lewis Altitude Wind Tunnel (AWT) circuit and included transfer function representations of the tunnel supply/exhaust air and refrigeration subsystems. Both steady state and frequency response data are presented for the circuit model indicating the type of results and accuracy that can be expected from the model. Transient data for closed loop control of the tunnel and its subsystems are also presented, demonstrating the model's use as a control analysis tool

The Consumer Price Index and Different Household Expenditure Patterns. Quarterly Economic Commentary Special Article, October 1975

The Consumer Price Index ( CPI) is now used increasingly as the major reference point in adjusting pay and social benefits to "compensate" for inflation. This raises many interesting questions about the precise meaning of compensation, its feasibility and its effects as well as the suitability of the CPI for the purpose. This paper, which is part of work in progress on these issues, examines how price changes affect different types of household by virtue of differences in their expenditure patterns

Algebraic-eikonal approach to medium energy proton scattering from odd-mass nuclei

We extend the algebraic-eikonal approach to medium energy proton scattering from odd-mass nuclei by combining the eikonal approximation for the scattering with a description of odd-mass nuclei in terms of the interacting boson-fermion model. We derive closed expressions for the transition matrix elements for one of the dynamical symmetries and discuss the interplay between collective and single-particle degrees of freedom in an application to elastic and inelastic proton scattering from $^{195}$Pt.Comment: latex, 14 pages, 4 figures uuencoded, to be published in Physical Review

Giving hope, ticking boxes or securing services? A qualitative study of respiratory physiotherapists' views on goal-setting with people with chronic obstructive pulmonary disease.

OBJECTIVE: To explore respiratory physiotherapists' views and experiences of using goal-setting with people with chronic obstructive pulmonary disease in rehabilitation settings. PARTICIPANTS: A total of 17 respiratory physiotherapists with ⩾12 months current or previous experience of working with patients with chronic obstructive pulmonary disease in a non-acute setting. Participants were diverse in relation to age (25-49 years), sex (13 women), experience (Agenda for Change bands 6-8) and geographic location. METHOD: Data were collected via face-to-face qualitative in-depth interviews (40-70 minutes) using a semi-structured interview guide. Interview locations were selected by participants (included participants' homes, public places and University). Interviews followed an interview guide, were audio-recorded and transcribed verbatim. DATA ANALYSIS: Data were analysed using thematic analysis; constant comparison was made within and between accounts, and negative case analysis was used. RESULTS: Three themes emerged through the process of analysis: (1) 'Explaining goal-setting'; (2) 'Working with goals'; and (3) 'Influences on collaborative goal-setting'. Goal-setting practices among respiratory physiotherapists varied considerably. Collaborative goal-setting was described as challenging and was sometimes driven by service need rather than patient values. Lack of training in collaborative goal-setting at both undergraduate and postgraduate level was also seen as an issue. CONCLUSION: Respiratory physiotherapists reflected uncertainties around the use of goal-setting in their practice, and conflict between patients' goals and organisational demands. This work highlights a need for wider discussion to clarify the purpose and implementation of goal-setting in respiratory rehabilitation