816 research outputs found
Validation of the Scale for the Assessment of Illness Behavior (SAIB) in a community sample of elderly people.
The aim of this study was to evaluate the construct validity of the SAIB in a community sample of elderly people. The SAIB was administered to a large community sample representative of the German population aged 60-85 years (n=1593). The original model was assessed and then refined through confirmatory and exploratory factor analyses. Criterion validity was evaluated by comparing SAIB scores with external criteria in 3 categories: subjective health, chronic illness and health care utilization. The originally suggested five factor structure of the SAIB yielded a comparative fit index (CFI) of 0.70 and the weighted root mean square residual (WRMR) was 3.68. A shortened questionnaire with 13 items and four factors resulted in better model fit (CFI 0.97 and WRMR 1.3). Correlations between subjective health and the new scales ranged from 0.06 to 0.33. Effect sizes (Cohens d) of mean differences in factor scores between those with and without healthcare system contact varied by healthcare type, ranging from 0.05 to 0.94; effect sizes were largest in relation to contact with psychotherapy and alternative medicine practitioners. We propose a shortened version of the SAIB with a different scale structure, which resulted in better model fit with our data. Neither the original nor revised SAIB appeared to discriminate well in terms of health care use, suggesting that the illness behavior as currently conceptualized may not fully explain the increased use of healthcare in the elderly
New problems, new challenges: embracing innovative approaches to sport research
New problems, new challenges: embracing innovative approaches to sport researc
Doping in sport: Whose problem is it?
In the last few years there has been a significant increase in the number and scope of social science research into doping in sport. However, despite this apparent progress, the field remains a disparate body of work and lacks both direction and leadership. Whilst sport management is a discipline that is well suited to provide such leadership, scholarly research into this controversial topic has not been published widely in sport management
journals. This special issue redresses this gap by bringing together a range of scholarly
articles that represent a variety of perspectives by authors from North America, Europe and Australia. The issues and challenges covered are varied, but each paper brings a common theme: the implications for the management of doping in sport. The six papers in this Special Issue of Sport Management Review are a significant addition to the slowly growing body of sport management scholarly work on doping in sport. It is hoped that future research will be prompted with this Special Issue and the discipline of sport management will recognize and respond to the challenges presented by doping
Rotation Prevents Finite-Time Breakdown
We consider a two-dimensional convection model augmented with the rotational
Coriolis forcing, , with a fixed
being the inverse Rossby number. We ask whether the action of dispersive
rotational forcing alone, , prevents the generic finite time breakdown
of the free nonlinear convection. The answer provided in this work is a
conditional yes. Namely, we show that the rotating Euler equations admit global
smooth solutions for a subset of generic initial configurations. With other
configurations, however, finite time breakdown of solutions may and actually
does occur. Thus, global regularity depends on whether the initial
configuration crosses an intrinsic, critical threshold, which
is quantified in terms of the initial vorticity, ,
and the initial spectral gap associated with the initial velocity
gradient, . Specifically, global regularity of the rotational Euler equation is
ensured if and only if . We also prove that the velocity field remains smooth if and
only if it is periodic. We observe yet another remarkable periodic behavior
exhibited by the {\em gradient} of the velocity field. The spectral dynamics of
the Eulerian formulation reveals that the vorticity and the eigenvalues (and
hence the divergence) of the flow evolve with their own path-dependent period.
We conclude with a kinetic formulation of the rotating Euler equation
The final frontier of anti-doping: a study of athletes who have committed doping violations
Although the use of banned drugs in sport is not a new phenomenon, little is known about
the experiences and perceptions of athletes who have committed anti-doping rule
violations. This study qualitatively explored the experiences of 18 athletes (from the
sports of bodybuilding, powerlifting, cricket, sprint kayak, rugby league, and swimming)
who had committed anti-doping violations. Themes explored included motivations for
initiating and maintaining doping, the psychology of doping, deterrents to doping, and
views on current anti-doping policy. In most cases doping had started early in their
careers. The perceived culture of the sport was considered central to the ‘normalization’ of
doping, particularly in bodybuilding. When explaining their decision to dope, athletes
engaged in processes or moral disengagement (including advantageous comparison,
minimizing consequences and diffusion of responsibility). Ironically, moral arguments
were perceived as the most effective deterrents to doping. Findings are discussed in
relation to the difficulties in establishing credible deterrents and suggestions for the future
development of anti-doping policy
Sidelined: employment relations in professional sports
Sidelined: employment relations in professional sport
Corruption in sport: understanding the complexity of corruption
Corruption in sport: understanding the complexity of corruptio
Escherichia coli MazF Leads to the Simultaneous Selective Synthesis of Both “Death Proteins” and “Survival Proteins”
The Escherichia coli mazEF module is one of the most thoroughly studied toxin–antitoxin systems. mazF encodes a stable toxin, MazF, and mazE encodes a labile antitoxin, MazE, which prevents the lethal effect of MazF. MazF is an endoribonuclease that leads to the inhibition of protein synthesis by cleaving mRNAs at ACA sequences. Here, using 2D-gels, we show that in E. coli, although MazF induction leads to the inhibition of the synthesis of most proteins, the synthesis of an exclusive group of proteins, mostly smaller than about 20 kDa, is still permitted. We identified some of those small proteins by mass spectrometry. By deleting the genes encoding those proteins from the E. coli chromosome, we showed that they were required for the death of most of the cellular population. Under the same experimental conditions, which induce mazEF-mediated cell death, other such proteins were found to be required for the survival of a small sub-population of cells. Thus, MazF appears to be a regulator that induces downstream pathways leading to death of most of the population and the continued survival of a small sub-population, which will likely become the nucleus of a new population when growth conditions become less stressful
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