Logic programs, iterated function systems, and recurrent radial basis function networks

Graphs of the single-step operator for first-order logic programs—displayed in the real plane—exhibit self-similar structures known from topological dynamics, i.e., they appear to be fractals, or more precisely, attractors of iterated function systems. We show that this observation can be made mathematically precise. In particular, we give conditions which ensure that those graphs coincide with attractors of suitably chosen iterated function systems, and conditions which allow the approximation of such graphs by iterated function systems or by fractal interpolation. Since iterated function systems can easily be encoded using recurrent radial basis function networks, we eventually obtain connectionist systems which approximate logic programs in the presence of function symbols.     

Comparison of different strategies to decrease negative affect and increase positive affect in women with borderline personality disorder

Background

In this study we compared the effect of different emotion regulation strategies on positive and negative emotions in patients with borderline personality disorder.

Methods

Emotion regulation strategies were a distracting task, individual positive memory imagery, individual soothing imagery, and a neutral comparison condition. During two separate sessions, 17 participants watched either neutral or negative movie segments before using these strategies.

Results

All three strategies influenced emotions into a favorable direction as compared to the neutral comparison condition. The positive memory image increased positive emotions significantly stronger than counting colors and distracting.

Discussion

Different strategies seem to have similar effects in decreasing negative emotions. Positive emotions may be affected in particular by positive and soothing imagery techniques.     

Foreign and domestic company attractiveness to host national employees in Japan: A person–organization fit and image theory perspective

This study contributes to research on organizational attractiveness and human resource management (HRM) by drawing on image theory to examine the effect of organizational characteristics (foreign vs. domestic company country‐of‐origin, HRM practices, organizational culture, and work environment) on organizational attractiveness perceptions by host country national (HCN) employees. Drawing on person–organization fit theory, we also examine the moderating effects of HCNs' demographic characters (age and gender), work‐related skills (English proficiency and international experience), and value orientations (individualism and risk aversion) between the relationship of these organizational characteristics and organizational attractiveness. A between‐subject scenario‐based experiment with 800 HCN employees in Japan suggest that not the company country‐of‐origin, but the local adaptation of organizational culture, HRM practices, and work environment influence HCNs' organizational attractiveness perceptions. HCNs' demographic characteristics, work‐related skills, and value orientations had moderating effects between these organizational characteristics and organizational attractiveness perceptions.     

Working memory deficits in transgenic rats overexpressing human adenosine A2A receptors in the brain

Adenosine receptors in the central nervous system have been implicated in the modulation of different behavioural patterns and cognitive functions although the specific role of A(2A) receptor (A(2A)R) subtype in learning and memory is still unclear. In the present work we establish a novel transgenic rat strain, TGR(NSEhA2A), overexpressing adenosine A(2A)Rs mainly in the cerebral cortex, the hippocampal formation, and the cerebellum. Thereafter, we explore the relevance of this A(2A)Rs overexpression for learning and memory function. Animals were behaviourally assessed in several learning and memory tasks (6-arms radial tunnel maze, T-maze, object recognition, and several Morris water maze paradigms) and other tests for spontaneous motor activity (open field, hexagonal tunnel maze) and anxiety (plus maze) as modification of these behaviours may interfere with the assessment of cognitive function. Neither motor performance and emotional/anxious-like behaviours were altered by overexpression of A(2A)Rs. TGR(NSEhA2A) showed normal hippocampal-dependent learning of spatial reference memory. However, they presented working memory deficits as detected by performance of constant errors in the blind arms of the 6 arm radial tunnel maze, reduced recognition of a novel object and a lack of learning improvement over four trials on the same day which was not observed over consecutive days in a repeated acquisition paradigm in the Morris water maze. Given the interdependence between adenosinic and dopaminergic function, the present results render the novel TGR(NSEhA2A) as a putative animal model for the working memory deficits and cognitive disruptions related to overstimulation of cortical A(2A)Rs or to dopaminergic prefrontal dysfunction as seen in schizophrenic or Parkinson's disease patients.     

Doing Field Studies of Religious Movements: An Agenda

Although the social scientific study of religion has seen the accumulation of numerous case studies, comparative work involving substantial numbers of cases is rare. In the absence of an accepted agenda for field research, field studies contain information relevant to the study at hand, but do not add systematically to a cumulative database. By contrast, field studies in anthropology may contain idiosyncratic information relevant to the author's interests, but an existing research agenda defines information researchers are expected to include, which has produced an expanding cross-cultural database. In this paper, we propose elements of a research agenda for the study of religious movements, including information related to movements' organizational history and context, mobilization, organization, governance, and outcomes. While this preliminary agenda is subject to refinement by others, it provides a starting point for the accumulation of comparable cases, and a basis for the comparative study of religious movements.     

Supervenience and infinitary property-forming operations

This paper provides an account of the closure conditions that apply to sets of subvening and supervening properties, showing that the criterion that determines under which property-forming operations a particular family of properties is closed is applicable both to the finitary and to the infinitary case. In particular, it will be established that, contra Glanzberg, infinitary operations do not give rise to any additional difficulties beyond those that arise in the finitary case.     

Situational variables related to aggression in institutional settings

For decades, aggressive behavior among psychiatric inpatients has been identified as disruptive to the therapeutic environment and a workplace hazard. Most previous research has focused on individual patient risk factors with less attention paid to the situational, environmental, or therapeutic milieu factors that could influence violence rates. This review outlines the prominent areas discussed in situational factor research and presents recent theoretical models that integrate these factors. Based on the identified shortcomings in the available literature, suggestions for future research directions are offered.     

Community Social Psychology in Brazil

Des comptes-rendus de deux Conférences organisées en Psychologie Sociale des Communautés, l'une à São-Paulo en 1981 et l'autre en 1988 à Belo Horizonte, nous extrayons une revue de ce qui a été réalisé dans ce champ depuis dix ans. Au début, les buts visaient la santé mentale et l'éducation populaire sans focaliser sur le rôle des psychologues. Dans les rapports de 1988, nous observons une définition plus claire de leur travail en conseil et en dynamique des groupes, à la recherche de la prise de conscience et de l'organisation des individus dans les communautés.
Une recherche participative entreprise dans une favela est présentée en détail, amenant une systématisation de la théorie et de la pratique en Psychologie Sociale des Communautés.
By using the published reports of two conferences on community social psychology, one held in São Paulo in 1981 and the other in Belo Horizonte in 1988, we present an overview of the developments in the field over a 10-year period. In 1981, emphasis was placed on mental health and popular education and not on the role of the psychologist. In 1988, however, the psychologist's role was more clearly defined: using counselling and group dynamics to reach consciousness and the organisation of communities.
Participative research undertaken in a favela is reported in detail, which systematises theory and practice in community social psychology.