Accessing public health information: a preliminary comparison of CABI's global health database and medline

Background: Access to a comprehensive public health index or database has been identified as problematic for health professionals. Public health literature contains many varied sources including reports, journal articles, and grey literature. Traditional biomedical databases such as medline often do not meet the needs of public health workers and researchers. Aim/Methods: The aim of the study was to examine the unique content of the global health database, by comparing it to the medline database. Pre‐determined terms were used as baseline comparators where controlled vocabulary definitions in each database were sufficiently matched. Retrieved results were stored and compared using EndNote libraries. Results: Results obtained from the terms used in the comparison study protocol suggest that the global health database holds a high proportion of unique records in comparison to medline . The largest overlap of duplicates from the global health database perspective came from the coccidiomycosis results set which contained 70.5% of references retrieved from both databases. Analyzing the results from a medline perspective, the subject with the largest overlap was dengue, with a 43% overlap. Conclusion: The results of this study show that the global health database is complimentary to medline in the subject areas of public health and global health.     

Introduction

Shortly after midnight every Thursday morning, a list server in Massachusetts delivers an electronic table of contents message to the Kostoris Medical Library at the Paterson Institute for Cancer Research in Manchester, UK. The messageins details of the latest edition of the New England Journal of Medicine, complete with hyperlinks to the full text of the content online. Publishers’ electronic current awareness services have been integrated into the dissemination process of the Library service to enhance the speed of communication and access to full text content. As a means of promoting electronic journal use, a system of e‐mail delivery coupled with fast Internet access has allowed a migration from paper‐based current awareness alerting to a seamless online product.     

School leadership models: what do we know?

The growth in the importance of school leadership has been accompanied by theory development, with new models emerging and established approaches being redefined and further developed. The purpose of this paper is to review current and recent writing on leadership models. The paper examines theoretical literature, to see how leadership is conceptualised, and empirical literature, to demonstrate whether and how the research evidence supports these concepts. The paper shows that leadership models are subject to fashion but often serve to reflect, and to inform, changes in school leadership practice.     

Validity and reliability of GPS for measuring distance travelled in field-based team sports

Abstract

The aim of the present study was to examine the effects of movement intensity and path linearity on global positioning system (GPS) distance validity and reliability. One participant wore eight 1-Hz GPS receivers while walking, jogging, running, and sprinting over linear and non-linear 200-m courses. Five trials were performed at each intensity of movement on each 200-m course. One receiver was excluded from analysis due to errors during data collection. The results from seven GPS receivers showed the mean (±s) and percent bias of the GPS distance values on the 200-m linear course were 205.8 ± 2.4 m (2.8%), 201.8 ± 2.8 m (0.8%), 203.1 ± 2.2 m (1.5%), and 205.2 ± 4 m (2.5%) for the walk, jog, run, and sprint trial respectively. Walk and sprint distances were significantly different from jogging and running distances (P < 0.05). The GPS distance values on the 200-m non-linear course were 198.9 ± 3.5 m (?0.5%), 188.3 ± 2 m (?5.8%), 184.6 ± 2.9 m (?7.7%), and 180.4 ± 5.7 m (?9.8%) for the walk, jog, run, and sprint trial respectively; these were significantly lower than those for the corresponding values on the linear course (P < 0.05). Differences between all non-linear movement intensities were significant (P < 0.05). The overall coefficient of variation within and between receivers was 2.6% and 2.8% respectively. Path linearity and movement intensity appear to affect GPS distance accuracy via inherent positioning errors, update rate, and conditions of use; reliability decreases with movement intensity.     

Event duration memory: The effects of delay-interval illumination and instructional cuing

The effect of interference treatments on pigeons’ working memory for event duration was investigated, using a successive matching-to-sample procedure. In three experiments, birds were trained to match different keylight durations (2 or 6 sec) to different comparison colors (red or green) following delays of 0 to 12 sec. The interfering effect of delay-interval illumination and illumination change was assessed in Experiments 1 and 2. It was found that the absolute levels of houselight illumination influenced delayed matching accuracy. Birds trained with houselight illumination showed larger decrements in matching accuracy with increasing delays than did birds trained with darkened delay intervals. In addition, increases in delay-interval illumination relative to baseline produced greater interference with delayed matching accuracy than did decreases in houselight illumination relative to baseline. In Experiment 3, the effect of interpolated instructional cues to remember or forget was examined. As in other directed forgetting experiments employing conventional modality characteristics as the samples to be remembered, it was found that instructional cues to forget, presented during the delay interval, reduced matching accuracy compared to instructional cues to remember. It was concluded that these findings support models of temporal memory that assume temporal information is coded into categorical information onto some nontime dimension over models that assume temporal information is remembered amodally as specific time durations.