On-line transformer condition monitoring through diagnostics and anomaly detection

This paper describes the end-to-end components of an on-line system for diagnostics and anomaly detection. The system provides condition monitoring capabilities for two in- service transmission transformers in the UK. These transformers are nearing the end of their design life, and it is hoped that intensive monitoring will enable them to stay in service for longer. The paper discusses the requirements on a system for interpreting data from the sensors installed on site, as well as describing the operation of specific diagnostic and anomaly detection techniques employed. The system is deployed on a substation computer, collecting and interpreting site data on-line

The Metalinguistic Protocol: Making Disciplinary Literacies Visible in Secondary Teaching and Learning

Concerns about adolescent literacy continue to be highlighted in regards to the challenges of reading and learning from academic text. Recent efforts to address these concerns have led to an examination of the disciplines and their specialized ways of thinking and using language. In this article I discusses a metalinguistic protocol in a think-aloud process as a framework to use in university content area literacy courses with secondary preservice teachers to examine the language and thinking as it is used in the disciplines of knowledge and to address the implications of disciplinary literacies for teaching and learning in secondary schooling

The Metalinguistic Protocol: Making Disciplinary Literacies Visible in Secondary Teaching and Learning

Concerns about adolescent literacy continue to be highlighted in regards to the challenges of reading and learning from academic text. Recent efforts to address these concerns have led to an examination of the disciplines and their specialized ways of thinking and using language. In this article I discusses a metalinguistic protocol in a think-aloud process as a framework to use in university content area literacy courses with secondary preservice teachers to examine the language and thinking as it is used in the disciplines of knowledge and to address the implications of disciplinary literacies for teaching and learning in secondary schooling

Hubble Space Telescope Fine Guidance Sensor Parallaxes For Four Classical Novae

We have used data obtained with the Fine Guidance Sensors on the Hubble Space Telescope to derive precise astrometric parallaxes for four classical novae: V603 Aql, DQ Her, GK Per, and RR Pic. All four objects exceeded the Eddington limit at visual maximum. Re-examination of the original light curve data for V603 Aql and GK Per has led us to conclude that their visual maxima were slightly brighter than commonly assumed. With known distances, we examine the various maximum magnitude-rate of decline relationships that have been established for classical novae. We find that these four objects show a similar level of scatter about these relationships as seen in larger samples of novae whose distances were determined using indirect techniques. We also examine the nebular expansion parallax method and find that it fails for three of the four objects. In each case it was possible to find an explanation for the failure of that technique to give precise distance estimates. DQ Her appears to suffer from an anomalously high extinction when compared to field stars on its sight line. We suggest that this is likely due to local material, which may also be the source of the IRAS detections of this object.NASA from the Space Telescope Science Institute AR12617NASA NAS 5-26555McDonald Observator