A study of shock impacts and vibration dose values onboard highspeed marine craft

The shocks and impacts encountered on small high-speed craft exceed the limits set for safe working practice according to current standards. European legislation regarding the exposure to vibration will have far reaching effects on the operators of such craft with respect to the safety of their employees. This paper sets out to highlight the vibration dose values that can be expected during typical transits onboard high-speed craft and attempts to clarify some of the controversy currently surrounding vibration dose measurement in such circumstances. In order to relate vibration dosage to the impacts encountered and to boat motion, an algorithm was developed that identifies the timing and magnitude of impacts

Waveforms for Gravitational Radiation from Cosmic String Loops

We obtain general formulae for the plus- and cross- polarized waveforms of gravitational radiation emitted by a cosmic string loop in transverse, traceless (synchronous, harmonic) gauge. These equations are then specialized to the case of piecewise linear loops, and it is shown that the general waveform for such a loop is a piecewise linear function. We give several simple examples of the waveforms from such loops. We also discuss the relation between the gravitational radiation by a smooth loop and by a piecewise linear approximation to it.Comment: 16 pages, 6 figures, Revte

Hauerwas and Willimon\u27s Resident aliens: Life in the Christian colony (Book Review)

A review of Hauerwas, S., & Willimon, W.H. (2014). Resident aliens: Life in the Christian colony (25th Anniversary ed.). Nashville, TN: Abingdon Press. 172 pp. $19.99. ISBN 978142678190

Evaluation by Foster Parents of Services Received from The Children’s Aid Society of Metropolitan Toronto

The problem area is evaluation of service by foster parents. My concern with this problem stems first from a general concern for what recipients of service value or devalue in that service. There is sparse available data in this area. John E. Mayer and Noel Timms state that “For many years caseworkers have experimented with different ways of helping people. Curiously, the resultant innovations have stemmed not from the client’s perception of what is helpful, but from the practitioner’s. Moreover, with few exceptions, the effectiveness of help has been judged by the persons offering, not receiving, help. In a word the client has rarely been asked what kind of help he wants or what he thinks of the help that has been given.” (Mayer, p. 32). Secondly, my concern stems from the fact that of many foster homes recruited and licensed, many are soon lost without clear reason from the agency’s point of view. It is hoped that if foster parents are encouraged to evaluate the service they expect or receive, new ideas for service and/or its differential use in foster homes might result in better maintenance of foster care for all concerned