4,074 research outputs found
Morone chrysops (Rafinesque): the White Bass in Lake Superior
On August 18, 1975, a young-of-the-year white bass, Morone chrysops was beach seined from Lake Superior at Marquette, Michigan. This is the first reported occurrence of the species in Lake Superior or its tributaries since an unverifiable sighting about 1880. Most likely the species has been recently introduced or has migrated through the St. Mary\u27s River from Lake Huron or Lake Michigan
An Empirical Examination of Symptom Substitution Associated with Behavior Therapy for Tourette\u27s Disorder
Over the past six decades, behavior therapy has been a major contributor to the development of evidence-based psychotherapy treatments. However, a long-standing concern with behavior therapy among many nonbehavioral clinicians has been the potential risk for symptom substitution. Few studies have been conducted to evaluate symptom substitution in response to behavioral treatments, largely due to measurement and definitional challenges associated with treated psychiatric symptoms. Given the overt motor and vocal tics associated with Tourette’s disorder, it presents an excellent opportunity to empirically evaluate the potential risk for symptom substitution associated with behavior therapy. The present study examined the possible presence of symptom substitution using four methods: (a) the onset of new tic symptoms, (b) the occurrence of adverse events, (c) change in tic medications, and (d) worsening of co-occurring psychiatric symptoms. Two hundred twenty-eight participants with Tourette’s disorder or persistent motor or vocal tic disorders were randomly assigned to receive behavioral therapy or supportive therapy for tics. Both therapies consisted of eight sessions over 10 weeks. Results indicated that participants treated with behavior therapy were not more likely to have an onset of new tic symptoms, experience adverse events, increase tic medications, or have an exacerbation in co-occurring psychiatric symptoms relative to participants treated with supportive therapy. Further analysis suggested that the emergence of new tics was attributed with the normal waxing and waning nature of Tourette’s disorder. Findings provide empirical support to counter the long-standing concern of symptom substitution in response to behavior therapy for individuals with Tourette\u27s disorder
Electromagnetic stabilization of tokamak microturbulence in a high- regime
The impact of electromagnetic stabilization and flow shear stabilization on
ITG turbulence is investigated. Analysis of a low- JET L-mode discharge
illustrates the relation between ITG stabilization, and proximity to the
electromagnetic instability threshold. This threshold is reduced by
suprathermal pressure gradients, highlighting the effectiveness of fast ions in
ITG stabilization. Extensive linear and nonlinear gyrokinetic simulations are
then carried out for the high- JET hybrid discharge 75225, at two
separate locations at inner and outer radii. It is found that at the inner
radius, nonlinear electromagnetic stabilization is dominant, and is critical
for achieving simulated heat fluxes in agreement with the experiment. The
enhancement of this effect by suprathermal pressure also remains significant.
It is also found that flow shear stabilization is not effective at the inner
radii. However, at outer radii the situation is reversed. Electromagnetic
stabilization is negligible while the flow shear stabilization is significant.
These results constitute the high- generalization of comparable
observations found at low- at JET. This is encouraging for the
extrapolation of electromagnetic ITG stabilization to future devices. An
estimation of the impact of this effect on the ITER hybrid scenario leads to a
20% fusion power improvement.Comment: 10 pages, 13 figures. Paper coupled to invited talk at the 41st EPS
conference, Berlin, 201
- …