2 edition of Measuring technological change: aircraft turbine engines found in the catalog.
Measuring technological change: aircraft turbine engines
Arthur J. Alexander
Prepared for Advanced Research Projects Agency and U.S. Air Force Porject Rand.
|Statement||[by] Arthur J. Alexander and J. R. Nelson.|
|Series||Rand report / Rand Corp -- R-1017-ARPA/PR., R (Rand Corporation) -- R-1017.|
|The Physical Object|
|Number of Pages||37|
COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. Each engine examined represents an important advance in this critical technology. Although every model of aircraft gas turbine ever developed represents some technological change, in the opinion of the author, the engines presented here demonstrate .
The invention relates to a device for determining a measurement of mass flow of fluid for a combustion chamber comprising a fluid metering device and a means of measuring the position of the metering device being measured. This device comprises: a mass flow meter, a hybridisation device for determining an actual mass flow of fluid comprising: a first input comprising a set-point value (WF set Cited by: To correctly measure the price changes of a product it is first necessary to measure the implicit technological change affecting the quality of the product, as only adjusted quality-prices can be directly compared over ng from the first operational American jet fighter and ending with the last one introduced at the beginning of.
The origins of the turbojet revolution. Edward W. Constant Ackeret aero-engine aerodynamic aerofoil aeronautical Air Ministry Aircraft Engines airframe altitude American aviation ratio reaction propulsion rocket Schelp Schneider Trophy scientific specific steam turbine supercharger supersonic technological change technological practice. History of technology - History of technology - The Industrial Revolution (–): The term Industrial Revolution, like similar historical concepts, is more convenient than precise. It is convenient because history requires division into periods for purposes of understanding and instruction and because there were sufficient innovations at the turn of the 18th and 19th centuries to.
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Measuring Technological Change: Aircraft Turbine• Engines Arthur J. Alcxander and J. Nelson A Report prepared for ADVANCED RESEARCH PRO'ECTS AGENCY AND UNITED STATES AIR FORCE PROJECT RAND Rana APPROVED FOR PUBLIC RELEASE, DISTRIBUTION UNLIMITEDFile Size: 2MB.
Get this from a library. Measuring technological change: aircraft turbine engines. [Arthur J Alexander; J R Nelson; Rand Corporation.; United States. Advanced Research Projects Agency.; Project Rand (United States. Air Force)]. Title: Measuring Technological Change: Aircraft Turbine Engines Author: J.
Nelson, Arthur J. Alexander Subject: This paper estimates turbine engine parameter trade-offs over time using multiple regression analysis. Movement of the parameter tradeoff curve is defined as technological advance.
The data base includes the first model of a given turbine engine to pass the model qualification test. The history of turbine engines strongly suggests that single parameter analysis cannot capture the richness of the development process.
Therefore, reduction in the level of such characteristics would increase the value of the device to the user. MEASURING TECHNOLOGICAL CHANGE: AIRCRAFT TURBINE ENGINES to represents the state of technology during the first time period.
As technology progresses, the curve shifts and the minimum weight falls for an engine of given by: Movement of the parameter trade-off curve is defined as technological advance. The database includes the first model of a given turbine engine to pass the Model Qualification Test.
The history of turbine engines strongly suggests that single parameter analysis cannot capture the richness of the development by: 7.
This methodology was first applied for measuring technological change in the development of aircraft turbine engines. The basic idea is to regress the characteristics of a device with time as the dependent variable. Under this approach the technology equation can be defined as: (2) T i = f x 1 x 2 x n where T i is the time in which a new Cited by: 5.
Measuring and forecasting technological change is a crucial issue from various points of view. This is particularly important in the case of weapon systems as this would enable technological performance and operational capabilities to be assessed in relation to potential threats.
5 A. Alexander and R. Nelson, Measuring Technological Change: Aircraft Turbine Engines~ RARPA/PR, May 6 This study has been revised and expanded from the author's disser tation submitted to the Department of Economics, Yale University.
Abstract. Measuring the evolution of microcomputer technology David K. Peterson Lynchburg College, Lynchburg, Virginia, USA Phillip E.
Miller East Tennessee State University, Johnson City, Tennessee, USA People who are interested in which characterizes the performance of that Introduction evaluating and rating micro- technology” (Martino, a). computer technology need a However, the. In Constant's model a "new normal technology" in aeronautics was established in when England and Germany firmly committed to develop the turbojet engine.
A tradition for technological testing was also essential in the evolution of turbine by: requirements to improve gas turbine engine performance, production and life limiting processes had their impacts on gas turbine technologies . In the s, aircraft engine control systems were based on hydromechanical technologies and were complex artifacts.
They encompassed a large number of components and subcomponents, and they were. Abstract. This paper presents methods for collecting and analysing judgements from groups of experts. It addresses issues associated with resolving the procedural and administrative problems involved in selecting a panel of experts, in eliciting informed judgements about the degree of technological advance on relevant projects, Cited by: 3.
Measuring Technological Change: Aircraft Turbine Engines”, (). New industrial product performance: the effect of market characteristics and strategy”, (). Objects and Subjects in Technological Interdependence. Towards a scale for measuring technology in new Author: Mario Coccia.
A.J. Alexander and J.R. Nelson, Measuring Technological Change: Aircraft Turbine Engines, RAND R — ARPA/RP, Santa Monica: RAND Corporation, ; Google Scholar M. Boretsky, in US Congress Joint Economic Committee, New Directions in the Soviet Economy (Washington: US Government Printing Office, ), pp.
–; Google ScholarCited by: 1. “Measuring technological change: Aircraft turbine engines.” Technological Forecasting and Social Change (): Bédier, Christophe, Maxence Vancauwenberghe, and Wolff van Sintern. This report describes the development and testing of such a technique using the technology of aircraft turbine engines as an example.
The measure of technological advance developed in this study Author: Mark Lorell. Each engine examined represents an important advance in this critical technology. Although every model of aircraft gas turbine ever developed represents some technological change, in the opinion of the author, the engines presented here demonstrate Cited by: The first patent on jet engine technology was procured in Britain by Frank Whittle in and the theoretical conception of the jet engine was first successfully applied to a working aircraft in Germany in England and Germany have therefore made significant contributions to the development of jet engine technology.
• Thrust cannot be measured • Changes in ambient condition and aircraft maneuvers cause distortion into the fan/compressor • Harsh operating environment – high temperatures and large vibrations • Safe operation – avoid stall, combustor blow out Size: 1MB.
Measuring technological change: aircraft turbine engines. Brown, KW. Measuring the effectiveness of weapons systems in terms of system attributes. Thesis, The engines of our ingenuity: an engineer looks at technology and culture. Oxford: Oxford University Press, Cited by: 1.
The commercial aviation industry emits million metric tons of carbon dioxide each year. While that represents only about 2 percent of global carbon emissions, there is evidence that the.The objective of this thesis is to investigate previous research performed in the area of cost, schedule, and performance tradeoffs in the acquisition of major weapon systems.
Results of the literature review indicate that several cost-schedule-performance models have been performed in two areas: aircraft airframes and aircraft turbine engines.