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PDF Ebook A beginners guide to e-business in construction

Submitted by antoq on Sat, 05/23/2009 - 07:15

With nearly a billion people online and more connecting every month,the Internet is changing the way we do business. As with any new application in an age of rapid technological change, people and companies are embracing the possibilities in different ways and to different timetables.

Some construction companies are confidently using the Internet as an efficient and effective business too while others are less comfortable with the concept of e-business - the term itself is an example of the jargon which can act as a deterrent for the many individuals and organisations not yet immersed in this new technology.

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Ebook International Politics Victorian Certificate of Education Study Desig

Submitted by antoq on Thu, 01/01/2009 - 06:45

In the twenty-first century, political decisions and actions taken by individuals, groups, organisations and governments are increasingly global in their impact. International Politics will enable students to understand and reflect on contemporary national and international political issues, problems and events, and the forces that shape them. The study offers students the opportunity to engage with key political, social and economic issues, to become more informed citizens, voters and participants in their local, national and international communities. The study includes the development of a conceptual framework within which students develop an understanding of the exercise of

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Aeronautics Ebook: Mixing in gas phase turbulent jets

Submitted by acrobat on Sun, 10/19/2008 - 07:35

This free ebooks is an experimental investigation of the mixing of the nozzle fluid of a round, turbulent jet with the entrained reservoir fluid, using laser-Rayleigh scattering methods. The measurements, at Reynolds numbers of 5,000 and 16,000, cover the axial range from 20 to 90 jet exit diameters and resolve the full range of temporal and spatial concentration scales. The measured mean and rms values of the concentration, and the mean scalar dissipation rate, when estimated from the time derivative of concentration, are consistent with jet similarity laws. Concentration fluctuation power spectra are found to be self-similar along rays emanating from the virtual origin of the jet, and are consistent with the universal form of scalar spectra proposed by Gibson (1968 II). The probability density functions for the concentration, the time derivative of concentration, and the square of the time derivative of concentration, are compiled and are also found to be self-similar along rays. Features of the measured distributions and spectra are consistent with the existence of large-scale structures within the flow that span the local diameter of the jet's turbulent cone. On the centerline of the jet, the scaled probability density function of jet gas concentration is found to be almost independent of the Reynolds number while the local mixing rate in the inner part of jet is not. The usual assumptions concerning isotropy and correlation of derivatives are found to lead to erroneous results for the probablility density function of the scalar dissipation rate.

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