MEASUREMENT OF YARN VELOCITY IN TEXTILE MACHINES USING A NON-CONTACT TRACER METHOD

The presented measurement method uses a tracer for measuring the transit time between two fixed points of known distance. For the marking static electric charge is used, which can be impressed by a corona discharge and detected with a capacitive detector. Since the yarn is an insulator, the charge does not move on its surface; therefore the tracer signal is not changed during the transit time. This means that the system is a pure dead-time system, and the transit time can be calculated by measuring the phase-shift between the two detectors. This phase shift is determined by a simplified Fourier-transform done by a microcomputer. This microcomputer is also used for generating all needed signals, input-output and averaging

Climate Fluctuation and Agricultural Change in Southern and Central New England, 1765-1880

This article discusses the theory that previous discussions of the decline of Maine population in the period 1765-1880 failed the address the impact of weather fluctuations on the society of Maine

Managing Water in an Urban Land. A New History of Rijnland

Managing Water in an Urban Land. A New History of RijnlandWaterstad in stedenland, a history of the Hoogheemraadschap Rijnland before 1857, is a fine example of the ‘new hydraulic history.’ By drawing information from a broad range of sources, employing an explicitly ecological approach, and imbedding their work in the social, economic, and political history of the period they cover, Milja van Tielhof and Petra J. E. M. van Dam have produced a well-researched, clearly-written, and attractive volume that is a worthy successor to Fockema Andreae’s classic study of nearly 75 years ago

Campaigning online : the internet, elections and democracy in Canada

As political engagement declines in Western democracies, the Internet has been held up as a promising site for citizen participation and engagement. This optimism has been fuelled by recent political events that seem to confirm the Internet's democratic potential. Barack Obama channelled the Internet's power for fundraising and voter mobilization in the 2009 U.S. election. Likewise, Iranian voters successfully used social media such as Twitter to organize protests of the country's 2009 presidential election. This paper presents a first look at how Canadian political parties are using and responding to online communication tools during elections campaigns. Specifically it examines the role of online communications tools in building and developing a campaign platform. Moreover, it discusses whether these activities represent a shift towards a strengthened democracy or are simply reflective of current political culture. The findings are based on data gathered through semi-structured interviews with political strategists involved in the 2008-09 federal, British Columbia provincial and Vancouver municipal elections. This study found that online communication during election campaigns has little influence on the shape of the policy platform. However, political parties have been quick to adopt new online communications platforms allowing them to market their candidates and policies. Moreover, the Internet has shaped traditional campaign functions allowing parties to recruit funds, voter information and volunteers online. Rather than fundamentally shifting the character of democracy in Canada, the current use of online communication tools seems to be defined by the existing political culture.Arts, Faculty ofJournalism, School ofGraduat

Temperature as a parameter in HPLC optimisation

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