Electromagnetic Waves in an Antiferromagnetic Waveguide

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The Early Years and the Development of Tolerance

This paper describes some of the issues surrounding the development of tolerance in young children, including the need to recognise that children's moral development is closely tied to their cognitive development. The importance of the family and other adult models is recognised as children make progress in understanding the views and rights of others. Teaching the young child about tolerance should be embedded in an inclusive approach to curriculum and children given opportunities to make decisions and take responsibility for their own actions consistent with their evolving capabilities.     

Diversity,Performance, and Satisfaction in Student Group Projects: An Empirical Study

This paper focuses on the effect that diversity has on the performance and satisfaction of student groups in a computer simulation project. Using structural equation modeling, we find evidence to support the contention of previous research that diversity negatively affects group satisfaction. This finding was strongest for undergraduate groups. While the relationship between diversity and performance is inconclusive, groups that are dominated by one person tend to have below average performance.     

Development of Automated Scoring Algorithms for Complex Performance Assessments: A Comparison of Two Approaches

Performance assessments are typically scored by having experts rate individual performances. The cost associated with using expert raters may represent a serious limitation in many large-scale testing programs. The use of raters may also introduce an additional source of error into the assessment. These limitations have motivated development of automated scoring systems for performance assessments. Preliminary research has shown these systems to have application across a variety of tasks ranging from simple mathematics to architectural problem solving. This study extends research on automated scoring by comparing alternative automated systems for scoring a computer simulation test of physicians'patient management skills; one system uses regression-derived weights for components of the performance, the other uses complex rules to map performances into score levels. The procedures are evaluated by comparing the resulting scores to expert ratings of the same performances.     

Response time variations in an online search system.

The response time characteristics of the National Library of Medicine's (NLM) ELHILL bibliographic search system are examined in this article. Transactions for a five-week period are analyzed and average response times are calculated for typical search commands, by time of day, and by file being searched. Overall, the response time of the system was found to be 2.1 seconds, a very low value. Based on statistical tests of significance applied to the data, it was concluded that response time differences can be explained in terms of the number of users on the system and not the command issued by the user nor the file the user searched.