26,329 research outputs found
Variability of flyover noise measures for repeated flights of turbojet and piston engine transport aircraft
Measurement of variability of aircraft noise during level flight flyover
New space research frequency band proposals in the 20- to 40.5-GHz range
Future space research communications systems may require spectra above 20 GHz. Frequency bands above 20 GHz are identified that are suitable for space research. The selection of the proper bands depends on consideration of interference with other radio services, adequate bandwidths, link performance, and technical requirements for practical implementation
Innovation, the diesel engine and vehicle markets: Evidence from OECD engine patents
This paper uses a patent data set to identify factors fostering innovation of diesel engines between 1974 and 2010 in the OECD region. The propensity of engine producers to innovate grew by 1.9 standard deviations after the expansion of the car market, by 0.7 standard deviations following a shift in the EU fuel economy standard, and by 0.23 standard deviations. The propensity to develop emissions control techniques was positively influenced by pollution control laws introduced in Japan, in the US, and in the EU, but not with the expansion of the car market. Furthermore, a decline in loan rates stimulated the propensity to develop emissions control techniques, which were simultaneously crowded out by increases in publicly-funded transport research and development. Innovation activities in engine efficiency are explained by market size, loan rates and by (Organisation for Economic Cooperation and Development) diesel prices, inclusive of taxes. Price effects on innovation, outweigh that of the US corporate average fuel economy standards. Innovation is also positively influenced by past transport research and development. © 2014 Elsevier Ltd
Combined pyrolysis and radiochemical gas chromatography for studying the thermal degradation of polymers
Pyrolysis gas chromatography and radioactive tracer techniques have
been used independently to study the thermal degradation of polymers. In
these laboratories the two techniques have been combined to elucidate
some of the mechanisms of the thermal degradation of epoxy resins and
polyimides. This paper describes the apparatus developed for this work
Opportunities and Challenges: The Caribbean Involvement in Free Trade Area ofthe Americas
This Article will examine the region\u27s participation in the process leading to the establishment of the FTAA, and the benefits and challenges associated with its involvement in this hemispheric undertaking. Part One of the Article sets out the rationale for the establishment of the FTAA and the structure of the negotiations. The section also identifies some elements of the unique nature of the proposed grouping. Part Two discusses the challenges facing Caribbean countries as they participate in multilateral trade negotiations, including the FTAA. In Part Three, the Article critically reviews the early stages of the integration process in the Caribbean and examines the most recent developments in the process, particularly in the context of the process of globalization and liberalization. This is followed by Part Four, which discusses the Caribbean\u27s participation in the FTAA
Opportunities and Challenges: The Caribbean Involvement in the Free Trade Area of the Americas
This Article will examine the region\u27s participation in the process leading to the establishment of the FTAA, and the benefits and challenges associated with its involvement in this hemispheric undertaking. Part One of the Article sets out the rationale for the establishment of the FTAA and the structure of the negotiations. The section also identifies some elements of the unique nature of the proposed grouping. Part Two discusses the challenges facing Caribbean countries as they participate in multilateral trade negotiations, including the FTAA. In Part Three, the Article critically reviews the early stages of the integration process in the Caribbean and examines the most recent developments in the process, particularly in the context of the process of globalization and liberalization. This is followed by Part Four, which discusses the Caribbean\u27s participation in the FTAA
Experimental atmospheric absorption values from aircraft flyover noise signals
Analysis of aircraft noise recordings to determine experimental values of atmospheric sound absorptio
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