Beneficial effect of enriched air nitrox on bubble formation during scuba diving. An open-water study

Bubble formation during scuba diving might induce decompression sickness.

This prospective randomised and double-blind study included 108 advanced recreational divers (38 females). Fifty-four pairs of divers, 1 breathing air and the other breathing nitrox28 undertook a standardised dive (24 ± 1 msw; 62 ± 5min) in the Red Sea. Venous gas bubbles were counted (Doppler) 30–<45 min (early) and 45–60 min (late) post-dive at jugular, subclavian and femoral sites.

Only 7% (air) vs. 11% (air28®) (n.s.) were bubble-free after a dive. Independent of sampling time and breathing gas, there were more bubbles in the jugular than in the femoral vein. More bubbles were counted in the air-group than in the air28-group (pooled vein: early: 1845 vs. 948; P = 0.047, late: 1817 vs. 953; P = 0.088). The number of bubbles was sex-dependent. Lastly, 29% of female air divers but only 14% of male divers were bubble-free (P = 0.058).

Air28® helps to reduce venous gas emboli in recreational divers. The bubble number depended on the breathing gas, sampling site and sex. Thus, both exact reporting the dive and in particular standardising sampling characteristics seem mandatory to compare results from different studies to further investigate the hitherto incoherent relation between inert gas bubbles and DCS.     

Rethinking academic literacies. A conceptual development based on teaching practice

Academic Literacies, the most influential conceptual framework for writing practitioners at UK universities, is closely related to widening participation. At the same time, writing support is often justified with the argument that written communication is among the most important employability skills for graduates. While these concepts are often used simultaneously, their underlying premises are not necessarily congruent. This paper reflects on a writing intervention that highlighted the difficulties that can arise from a seeming ‘pick and mix’ use of these two frameworks, Academic Literacies and writing as an Employability Skill. Based on this analysis of the practice of teaching writing at a post-92 university, it establishes the need for an expanded, theoretical framework for writing support.     

Developmental Changes in Attention and Comprehension Among Children With Attention Deficit Hyperactivity Disorder

Changes in visual attention and story comprehension for children (N = 132) with attention deficit hyperactivity disorder (ADHD) and comparison peers were examined. Between the ages of 7 and 9 (Phase 1) and approximately 21 months later (Phase 2), children viewed 2 televised stories: 1 in the presence of toys and 1 in their absence. Both groups of children showed developmental increases in visual attention and stable group differences over time. Deficits in comprehension among children with ADHD, however, increased over time. Whereas comparison children’s recall of factual and causal information increased over time in both viewing conditions, children with ADHD showed no developmental improvement in recall of factual information in the toys‐present condition and no improvement in recall of causal relations in either viewing condition.     

Learning from fellow engineering students who have current professional experience

This paper presents an investigation of how experience-led content in an engineering degree can be strengthened by creating opportunities for engineering students to benefit from the knowledge, skills and resources of students with current professional experience. Students who study civil engineering part-time at Coventry University (while also working in the industry) are being used as mentors for full-time students, and careful attention is being paid to the input they can make to group project work. This paper reviews the results of evaluations of these two initiatives. The clearest enhancement to learning provided by the part-time students in these settings is the access they provide for the full-time students to real examples and the provision of actual physical artefacts such as drawings, photos, example documents and templates. Full-time students also gain an awareness of the value of the professional skills. The study confirms the value of these initiatives and points to future improvements.     

The Development of a Community of Practice for Educators Working with Newcomer,Spanish-speaking Students

Drawing on 3 years of observational, survey, and interview data, this article highlights the importance of communities of practice (Lave & Wenger, 1991) for school staff members supporting Spanish-speaking, newcomer students in large, comprehensive high schools that often lack the resources to directly support this population. We highlight how a research project focused on the implementation and development of a bilingual math and science curriculum across 4 schools in urban and rural California provided teachers, counselors and school leaders the necessary space and community to know what and how to best serve immigrant, Spanish-dominant students. The article demonstrates how these school staff people leveraged the research project meetings and check-ins with research assistants to share best practices and common challenges across schools and roles when working with newcomer students.     

Public Libraries and the Internet 2012: Key Findings,Recent Trends,and Future Challenges

Since 1994, 14 reliable national studies have provided longitudinal data revealing and analyzing trends in the public access computing, Internet access, and technology assistance and training that public libraries make available to the communities they serve. This article provides an overview of selected data from the 2012 study; examines major issues that have emerged from the data in the most recent studies; identifies key trends and changes in Internet-enabled services and resources provided by public libraries to their communities over the course of the 18 years of conducting the national surveys; and discusses selected future issues and challenges regarding public library Internet-enabled services.     

The use of correlation coefficients in test validation

Although the Pearson Product Moment Correlation Coefficient, r, is commonly used in student selection, it is argued here, that it is frequently more appropriate to use the Bi-serial Correlation Coefficient r_bis for this purpose.Now working in Clinical Psychology.     

Le diagnostic du potentiel d’apprentissage par LPAD: Une etude de la fidélité

The present study was intended to test some of the psychometric properties of Feuerstein’s Learning Potential Assessment Device (LPAD), in particular the reliability of the Set Variations II, considered to assess modificability or learning capacity. Thirty 10-year-old children were studied: an experimental group (N=20) submitted to two training sessions with Set Variations II and a control group (N=10). Both groups were administered three times the Standard Progressive Matrices (SPM). The experimenter’s interventions during training were semi-standardized, based on an examination guide, and the helps given were classified in four types. Analyses dealt with the number and type of helps provided as well as with errors during training. Correlations between these indices for the two sessions of training were rather low, indicating weak stability, in particular with respect to the helps provided. Correlations were also computed between the gains in SPM for the three administrations, indicating low stability in amount of progression. Further, it was also noted that the experimental group did not progress more than the control group. Conclusions are drawn with respect to reliability and validity of the Set Variations Test, as well as, on a more theoretical level, with respect to the concept of cognitive modifiability.