Allen Davis – författare

Nondestructive Testing involves the use of methods such as wave propagation, electromagnetism, electrical conductivity, and thermal conductivity to test structural integrity and thereby allow nondestructive assessment of structures and the possibility of structural failures before they occur.Nondestructive Testing of Deep Foundations covers different techniques designed to provide information about the integrity and quality of the material that makes up a deep foundation.Nondestructive Testing methods are used at all stages of a structure's life - from new construction quality control to residual lifetime prediction, and even during the monitoring of demolition. In addition, Nondestructive Testing is being increasingly specified in deep foundation projects, though often without a good understanding of its limitations and with the result that methods are often misused. In order to be able to specify an appropriate method, or to recognize an inappropriate specification, it is necessary for the engineer, specifier and/or contractor to understand the capabilities and limitations of each of the methods currently in use.Nondestructive Testing of Deep Foundations: Describes the most commonly used deep foundation construction techniques, including typical use of materialProvides a brief history of the development of commercially available nondestructive methodsSummarises each method's capabilities and limitationsActs as a one stop reference drawing together resources only previously available in conference proceedings and journal papersThis manual will prove to be a welcome addition to the bookshelf of all practitioners in civil/structural and geotechnical engineering and architecture. It will also provide a valuable insight into this highly technical field for university researchers, lecturers and postgraduate students in civil/structural and geotechnical engineering.

Allen Davis looks at the influence of settlement-house workers on the reform movement of the progressive era in Chicago, New York, and Boston. These workers were idealists in the way they approached the future, but they were also realists who knew how to organize and use the American political system to initiate change. They lobbied for a wide range of legislation and conducted statistical surveys that documented the need for reform. After World War I, settlement workers were replaced gradually by social workers who viewed their job as a profession, not a calling, and who did not always share the crusading zeal of their forerunners. Nevertheless, the settlement workers who were active from the 1880s to the 1920s left an important legacy: they steered public opinion and official attitudes toward the recognition that poverty was more likely caused by the social environment than by individual weakness,