Experimental and Numerical Seismic Response of a 65 kW Wind Turbine

A full-scale shake table test is conducted to assess the seismic response characteristics of a 23 m high wind turbine. Details of the experimental setup and the recorded dynamic response are presented. Based on the test results, two calibrated beam-column finite element models are developed and their characteristics compared. The first model consists of a vertical column of elements with a lumped mass at the top that accounts for the nacelle and the rotor. Additional beam-column elements are included in the second model to explicitly represent the geometric configuration of the nacelle and the rotor. For the tested turbine, the experimental and numerical results show that the beam-column models provide useful insights. Using this approach, the effect of first-mode viscous damping on seismic response is studied, with observed experimental values in the range of 0.5–1.0% and widely varying literature counterparts of 0.5–5.0%. Depending on the employed base seismic excitation, damping may have a significant influence, reinforcing the importance of more accurate assessments of this parameter in future studies. The experimental and modeling results also support earlier observations related to the significance of higher modes, particularly for the current generation of taller turbines. Finally, based on the outcomes of this study, a number of additional experimental research directions are discussed.     

Monitoring and Management Options in the Preservation of Urban Waterlogged Deposits,Nantwich, UK

A baseline survey in 2007 characterized the physical and chemical conditions for preservation within waterlogged remains at Nantwich. Installation of eighteen dipwells has allowed a five-year monitoring programme to be conducted from 2011. Two add-on projects supplemented this monitoring programme by examining the different methods for redox measurement, and for soil moisture measurement using Time Domain Reflectometry (TDR).

Initial results show two main zones of preservation, with reducing conditions attributed to location of the deposits in the floodplain, and a second zone uphill with more variable conditions for preservation. This study shows that sediment-coring programmes combined with dipwell installations can provide useful data to assess and monitor in situ preservation conditions, which can help to formulate management strategies for conservation of waterlogged archaeological deposits. This paper focuses on the efficacy of the methodology, referencing in particular comparative monitoring techniques and lists a series of recommendations for future studies.     

How to Carefully Construct a Hospital over a Roman Boat in Central London,UK

This paper examines the Roman boat, buried beneath Guys Hospital in London, UK. A small part was discovered in 1958, and has been carefully left free of disturbance since that date. In 2009, a proposal was made to construct a 14-storey building above the boat; clearly raising challenges for preservation, not to mention the philosophy of burying or excavating and entire ancient monument. A trial pit was opened to see if any remains of the boat survived and uncovered well-preserved timber planks and nails preserved five metres below ground level. Consequently, archaeologists worked closely with the entire design team, determined that more was required than the usual scheme of preserving and monitoring the boat. A legal agreement was secured, making this one of the few projects in the world to have a clearly structured and enforceable plan, if the monitoring data show demonstrable deterioration.     

AN APPRAISAL OF THE SOVIET CONCEPT OF THE TERRITORIAL PRODUCTION COMPLEX

The paper, contributing to one of the research goals of the Commission on Industrial Systems, International Geographical Union, provides an appraisal of the Soviet approach to spatial organization of the economy known as the territorial production complex. The authors review the genesis of the concept, definitional criteria, and its practical formation and operation, making occasional comparison with Western approaches to spatial economic organization. An unresolved problem for Soviet planners is the provision of a coordinating administrative authority for each territorial complex that would integrate the activities of individual industrial ministries involved in the creation of the complex; the current thinking of Soviet planners is illuminated by a recent statement appended to the paper. (For a previous Western view of Soviet regional development models, see G. A. Huzinec in Soviet Geography, October 1976.)     

Eselsohren: the Journal of History of Art,Architecture and Urbanism, 1/1, 2013

Abstract

This article first describes the prime movers surviving in three Irish distilleries, and shows how steam and water power were used in conjunction at two of them. The second section describes surviving stationary steam engines in other industries, and these are described in order of technological development, so giving an indication of the evolution of the stationary steam engine between about 1895 and 1940.     

Winda Lingo Parugoneit1 or Why Set the Bush [On] Fire? Fire and Victorian Aboriginal People on the Colonial Frontier

There is an ethnographic and historical record that, despite its paucity, can offer specific insight into various contextual matters (purpose, motivations, acknowledgement) relating to how and why fire was being used by Victorian Aboriginal people in the nineteenth century. This insight is essential to developing cross-culturally appropriate land and fire management strategies in the present and into the future. This article demonstrates the need for further research into historical accounts of Aboriginal burning in Victoria.