0000000001150646
AUTHOR
Robert Phillips
Ultrasonic Guided Waves-Based Monitoring of Rail Head: Laboratory and Field Tests
Recent train accidents have reaffirmed the need for developing a rail defect detection system more effective than that currently used. One of the most promising techniques in rail inspection is the use of ultrasonic guided waves and noncontact probes. A rail inspection prototype based on these concepts and devoted to the automatic damage detection of defects in rail head is the focus of this paper. The prototype includes an algorithm based on wavelet transform and outlier analysis. The discrete wavelet transform is utilized to denoise ultrasonic signals and to generate a set of relevant damage sensitive data. These data are combined into a damage index vector fed to an unsupervised learning…
The Past, History, and Corporate Social Responsibility
An emerging body of research recognizes the importance of the past and history for corporate social responsibility (CSR) scholarship and practice. However, the meanings that scholars and practitioners can ascribe to the past and history differ fundamentally, posing challenges to the integration of history and CSR thinking. This essay reviews diverse approaches and proposes a broad conceptualization of the relationship between the past, history, and CSR. We suggest historical CSR as an umbrella term that comprises three distinct theoretical perspectives. The “past-of-CSR” perspective is concerned with the history of CSR and business ethics as a set of concepts and practices. The “past-in-CSR…