Superposition of a static perfect fluid and a radial elecric field

We obtain a two-parameter set of solutions, which represents a spherically symmetric space-time with a superposition of a neutral fluid and an electric field. The electromagnetic four-potential of this Einstein-Maxwell space-time is taken in the form A=(q/n)(r^n)dt, when n=/0 and A=q*ln(r)dt, when n=0 (where q and n are arbitrary constants)Comment: 12 pages, RevTeX, no figure

THE GASTRIC FUNDUS

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Learning therapy : some reflections on the constraints and dilemmas involved : a case study

Bibliography: leaves 55-57.This dissertation reviews the process of learning psychotherapy. It focuses on the second year of a two-year course work degree at the University of Cape Town, the M.A. in Clinical Psychology. In problematizing the method of teaching psychotherapy, Steiner's (1984) three essential elements for training psychotherapists are introduced (i.e. a personal therapy, abundant clinical experience with supervision and a study of theory). These are used as a structure in which to consider the training programme outlined. A suggestion is made that the learning process necessitates a difficult intellectual and emotional rite of passage, a theme referred to throughout the study. The personal process of 'growing' into a Kleinian I Object Relations orientation is described. Some theoretical concepts central to this framework are introduced. Clinical case material (derived from therapy notes collected over a period of 47 weeks) is used to demonstrate a developing understanding of these concepts. Some of the dilemmas of a trainee therapist grappling with the process are described. The constraints of learning therapy within the context described, i.e. within a course which is not focussed exclusively on therapy training are highlighted. In concluding that trainers are ambivalent about the psychotherapy component of the programme described. the study offers some useful insights for trainers, supervisors and trainees

What Constitutes Covered Employment Within the Contemplation of the Ohio Workmen\u27s Compensation Act

Workmen\u27s compensation acts have been generally interpreted in three ways: first, as the substitution of a statutory tort for a common law tort; second, as the regulation of the relationship between employer and employee, which is primarily contractual in character; third, as the creation of a new statutory relation between master and servant, the chief incident of which is to impose upon the master financial responsibility for certain risks of service. While these represent the underlying legal philosophies in the enactment of workmen\u27s compensation laws, the desiderata in enactment of workmen\u27s compensation laws vary from state to state, and for that reason the acts of the various states are as varied in their provisions and coverage as is the imagination of man. This article, therefore, is limited to the coverage contemplated by the Ohio Workmen\u27s Compensation Law

A parallel portfolio SAT solver with lockless physical clause sharing

Since multi-core architectures have become well-established the enquiry for parallel SAT solvers has drastically increased. Meanwhile, several successful SAT solvers have been presented that can be run in parallel mode. However, there are only a few solvers that use the shared memory architectures for physical clause sharing. In this paper we present a parallel SAT solver that allows for sharing clauses between several threads logically and physically. Yet any thread is still able to keep its own set of clauses. We show how physical clause sharing can be used to propagate one thread's improvements on the clause database to all solving threads. Despite the extensive sharing of data our solver does not require any operating system lock

Cultural issues in the psychiatric assessment of Xhosa children and adolescents

Traditional healers living in Guguletu, Cape Town, were interviewed about their practices in order to ascertain whether or not there are cultural/indigenous expressions of psychological distress or dysfunction in black children and adolescents. Besides bedwetting, fits and school anxiety, five other 'syndrOInes' were described: ukupharnbana, ukuphaphazela, arnafufunyane, urnoya and ukuthwasa. Although detailed case studies are required to establish the internal validity and exact nature of these 'syndromes', it is clear that any systematic study of psychiatric disorders in Xhosa children and adolescents needs to take them into account

An electric charge has no screw sense--a comment on the twistfree formulation of electrodynamics by da Rocha & Rodrigues

Da Rocha and Rodigues (RR) claim (i) that in classical electrodynamics in vector calculus the distinction between polar and axial vectors and in exterior calculus between twisted and untwisted forms is inappropriate and superfluous, and (ii) that they can derive the Lorentz force equation from Maxwell's equations. As to (i), we point out that the distinction of polar/axial and twisted/untwisted derives from the property of the electric charge of being a pure scalar, that is, not carrying any screw sense. Therefore, the mentioned distinctions are necessary ingredients in any fundamental theory of electrodynamics. If one restricted the allowed coordinate transformations to those with positive Jacobian determinants (or prescribed an equivalent constraint), then the RR scheme could be accommodated; however, such a restriction is illegal since electrodynamics is, in fact, also covariant under transformations with negative Jacobians. As to (ii), the "derivation" of the Lorentz force from Maxwell's equations, we point out that RR forgot to give the symbol F (the field strength) in Maxwell's equations an operational meaning in the first place. Thus, their proof is empty. Summing up: the approach of RR does not bring in any new insight into the structure of electrodynamics.Comment: Added answer to da Rocha & Rodrigues arXiv:0912.212

Prescriptive Travel and Adventure-Based Activities as Adjuncts to Counselling

One of the greatest challenges for counsellors is finding ways to promote constructive client actions outside sessions (Shelton & Levy, 1981). Often, clients perform well during therapeutic encounters but have difficulty applying what they have learned to real life situations (Stokes & Baer, 1977). In fact, inability to generalize learning is one of the most frequent problems encountered in our field (Rose, 1989). Some of our most difficult and resistant clients are those who appear compliant, cooperative, eager, and solicitous in sessions but don\u27t translate insights into action in their lives (Kottler, 1992), and don\u27t continue their progress after treatment ends (Davison, 1997). Yet they will have achieved little for their efforts if they cannot apply what they have learned in other settings and at other times

Theories of Crying

It was dark outside, and cold, so cold the man’s eyes stung from the moisture on his lids. He was hunched over, trying to make himself as small a target as possible against the frigid wind. He shuffled along at an unsteady gait, trying to keep his balance on the slick sidewalk. Occasionally, he would stop, peek out from under his hood to reorient himself in the blowing snow, and then step cautiously but purposefully onward toward his destination

Dark Energy and the mass of galaxy clusters

Up to now, Dark Energy evidences are based on the dynamics of the universe on very large scales, above 1 Gpc. Assuming it continues to behave like a cosmological constant $\Lambda$ on much smaller scales, I discuss its effects on the motion of non-relativistic test-particles in a weak gravitational field and I propose a way to detect evidences of $\Lambda \neq 0$ at the scale of about 1 Mpc: the main ingredient is the measurement of galaxy cluster masses.Comment: 5 pages, no figures, references adde