1,123 research outputs found
The Performance of Psychopaths on the Wechsler-Bellevue Test
A problem of persistent interest to the clinical psychologist is the discovery of characteristics of performance on psychological tests that will serve to differentiate various clinical groups. Such signs, if they can be found, would be of considerable assistance in determining diagnosis in borderline cases and would greatly enhance the value of clinical psychometrics differentiate these groups. In the course of a study of cases of psychopathic personality, initiated at the University Psychopathic Hospital by Dr. Gottlieb and Dr. Knott, we became interested in an analysis of the psychometric performance of the psychopath and in the relationships between psychometric performance, the electroencephalogram, and certain clinical characteristics. The present paper, however, will be limited to an analysis of the Wechsler-Bellevue scores of a group of adolescent psychopaths
On Chiral Symmetry Restoration at Finite Density in Large N_c QCD
At large N_c, cold nuclear matter is expected to form a crystal and thus
spontaneously break translational symmetry. The description of chiral symmetry
breaking and translational symmetry breaking can become intertwined. Here, the
focus is on aspects of chiral symmetry breaking and its possible restoration
that are by construction independent of the nature of translational symmetry
breaking---namely spatial averages of chiral order parameters. A system will be
considered to be chirally restored provided all spatially-averaged chiral order
parameters are zero. A critical question is whether chiral restoration in this
sense is possible for phases in which chiral order parameters are locally
non-zero but whose spatial averages all vanish. We show that this is not
possible unless all chirally-invariant observables are spatially uniform. This
result is first derived for Skyrme-type models, which are based on a nonlinear
sigma model and by construction break chiral symmetry on a point-by-point
basis. A no-go theorem for chiral restoration (in the average sense) for all
models of this type is obtained by showing that in these models there exist
chirally symmetric order parameters which cannot be spatially uniform. Next we
show that the no-go theorem applies to large N_c QCD in any phase which has a
non-zero but spatially varying chiral condensate. The theorem is demonstrated
by showing that in a putative chirally-restored phase, the field configuration
can be reduced to that of a nonlinear sigma model.Comment: 12 pages, 1 tabl
The Effect of Interpolation of Performance Test Items on Stanford-Binet Scores
The clinical psychologist frequently wishes to obtain both performance and verbal I.Q.\u27s on a child at a single session. To maintain interest and rapport, examiners have sometimes adopted the practice of interpolating the performance sub-tests between the verbal test levels. Since this constitutes a deviation from the conditions under which the Binet test has been standardized, the question has arisen as to whether this practice affects the scores obtained on the two tests. The present experiment was designed to provide an answer to this question
Effect of Variation of Chord and Span of Ailerons on Rolling and Yawing Moments in Level Flight
This report presents the results of an investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wing sections. Some attention is devoted to a study of the effect of scale on rolling and yawing moments and to the effect of slightly rounding the wing tips. The results apply to level flight with the wing chord set at an angle of attack of +4 degrees and to conditions of zero pitch, zero yaw, and zero roll of the airplane. It is planned later to extend the investigation to other attitudes for monoplane and biplane combinations. The work was conducted in the 10 foot wind tunnel of the Bureau of Standards on models of 60-inch span and 10-inch chord. (author
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NON-MIGRAINE RELATED PAIN BEHAVIOURS IN A TRANSGENIC "MIGRAINE MOUSE" WITH CIRCADIAN DISRUPTION
Effect of Variation of Chord and Span of Ailerons on Rolling and Yawing Moments at Several Angles of Pitch
This report presents the results of an extension to higher angles of attack of the investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wings. The measurements were made at various angles of pitch but at zero angle of roll and yaw, the wing chord being set at an angle of +4 degrees to the fuselage axis. In the case of the Clark Y airfoil the measurements have been extended to a pitch angle of 40 degrees, using ailerons of span equal to 67 per cent of the wing semispan and chord equal to 20 and 30 per cent of the wing chord. The work was conducted on wing models of 60-inch span and 10-inch chord
Perspectives for Positron Emission Tomography with RPCs
In this study we address the feasibility and main properties of a positron
emission tomograph (PET) based on RPCs. The concept, making use of the
converter-plate principle, takes advantage of the intrinsic layered structure
of RPCs and its simple and economic construction. The extremely good time and
position resolutions of RPCs also allow the TOF-PET imaging technique to be
considered. Monte-Carlo simulations, supported by experimental data, are
presented and the main advantages and drawbacks for applications of potential
interest are discussed.Comment: Presented at "RPC2001-VI Workshop on Resistive Plate Chambers and
Related Detectors", Coimbra, Portugal, 26-27 November 2001 (5 pages
Assessment of the face validity of two pain scales in Kenya: a validation study using cognitive interviewing
Background: Patients in sub-Saharan Africa commonly experience pain, which often is un-assessed and undertreated. One hindrance to routine pain assessment in these settings is the lack of a single-item pain rating scale validated for the particular context. The goal of this study was to examine the face validity and cultural acceptability of two single-item pain scales, the Numerical Rating Scale (NRS) and the Faces Pain Scale-Revised (FPS-R), in a population of patients on the medical, surgical, and pediatric wards of Moi Teaching and Referral Hospital in Kenya. Methods: Swahili versions of the NRS and FPS-R were developed by standard translation and back-translation. Cognitive interviews were performed with 15 patients at Moi Teaching and Referral Hospital in Eldoret, Kenya. Interview transcripts were analyzed on a question-by-question basis to identify major themes revealed through the cognitive interviewing process and to uncover any significant problems participants encountered with understanding and using the pain scales. Results: Cognitive interview analysis demonstrated that participants had good comprehension of both the NRS and the FPS-R and showed rational decision-making processes in choosing their responses. Participants felt that both scales were easy to use. The FPS-R was preferred almost unanimously to the NRS. Conclusions: The face validity and acceptability of the Swahili versions of the NRS and FPS-R has been demonstrated for use in Kenyan patients. The broader application of these scales should be evaluated and may benefit patients who currently suffer from pain
Parallelization of Kinetic Theory Simulations
Numerical studies of shock waves in large scale systems via kinetic
simulations with millions of particles are too computationally demanding to be
processed in serial. In this work we focus on optimizing the parallel
performance of a kinetic Monte Carlo code for astrophysical simulations such as
core-collapse supernovae. Our goal is to attain a flexible program that scales
well with the architecture of modern supercomputers. This approach requires a
hybrid model of programming that combines a message passing interface (MPI)
with a multithreading model (OpenMP) in C++. We report on our approach to
implement the hybrid design into the kinetic code and show first results which
demonstrate a significant gain in performance when many processors are applied.Comment: 10 pages, 3 figures, conference proceeding
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