Domination and total domination in complementary prisms

Let G be a graph and be the complement of G. The complementary prism of G is the graph formed from the disjoint union of G and by adding the edges of a perfect matching between the corresponding vertices of G and . For example, if G is a 5-cycle, then is the Petersen graph. In this paper we consider domination and total domination numbers of complementary prisms. For any graph G, and , where γ(G) and γ _t (G) denote the domination and total domination numbers of G, respectively. Among other results, we characterize the graphs G attaining these lower bounds. Research supported in part by the South African National Research Foundation and the University of KwaZulu-Natal.     

Who is bullying whom in ethnically diverse primary schools? Exploring links between bullying,ethnicity, and ethnic diversity in Dutch primary schools

This study investigated associations between ethnicity, ethnic diversity, and bullying among 739 pupils enrolled in their last year of primary school. Hypotheses derived from social misfit and inter-ethnic relations theories were tested using the multilevel p₂ model. Our key findings were: (1) inter- and intra-ethnic bullying are just as common in ethnically heterogeneous as in homogeneous classes; (2) pupils belonging to the Turkish and Moroccan minority groups bully significantly more than native Dutch (in particular according to victims); the chance to be victimized does not depend on the ethnic background of the pupil; (3) the prevalence of inter- and intra-ethnic bullying depends on the level of ethnic diversity in the class; inter-ethnic and intra-ethnic bullying increase with increasing levels of ethnic diversity.     

Policies for older volunteers: A study of Germany and Italy, 1990–2008

Older people increase their well-being and contribute to the community when they volunteer. Therefore, policy-makers sometimes consider supporting older volunteers. However, they reach different conclusions on whether they should introduce policies for older volunteers, and on what policy would be the most suitable. This article studies how policies for older volunteers emerged in Germany and Italy, both countries having one of the oldest populations in the world. It explores the political discourse on older volunteers, and how this discourse translates into policies. To do this, the article presents data collected in expert interviews and document analysis. Findings show that German policy-makers stress the contribution of volunteering to older people's well-being and have introduced policies for older volunteers. Italian policy-makers, in contrast, frame older volunteers as social service providers and have decided not to single out specific age groups in their policies for volunteers. Moreover, the policies are influenced by the policy-makers' perceptions and path-dependencies, meaning policies and institutions that were introduced in the past. These findings suggest that whether or not policies for older volunteers emerge depends less on the characteristics of the older population and more on the society and its political traditions.     

Non-Abstinence-Based Supportive Housing for Persons with Co-Occurring Disorders: A Human Rights Perspective

Surveys of providers of social services in Portland, Oregon, in 2003 and 2007 revealed a significant policy shift in meeting the housing needs of chronically mentally ill, homeless persons with ongoing substance-abuse problems. The shift in policy, taking place in Portland, Seattle, Washington, Minneapolis, and other U.S. cities, from a sobriety-first requirement to a housing-first philosophy has occurred largely because of cost-effectiveness. Only when such housing is provided as a human right can we say that a true paradigm shift has occurred.     

Parental Speech at 6 Months Predicts Joint Attention at 12 Months

In a prospective longitudinal study of a representative community sample (N = 264), mothers' references to infants' mental states were coded during a topic‐sharing task in the home at 6 months. Joint attention behaviour was assessed in the laboratory at 12 months. Individual joint attention skills (gaze following, gaze alternating, and declarative pointing) were significantly inter‐correlated, with a single factor accounting for 68% of the variance. Mothers' references to infants' mental states at 6 months predicted infants' joint attention at 12 months. The association was not explained by sociodemographic characteristics of the family, the mother's mental state, or by the quantity or acoustic properties of her speech. However, variability in pitch of maternal speech was an independent predictor of the infants' later joint attention skills. Taken together, these findings suggest that mothers' infant‐directed speech fosters infants' attentive participation in topic‐sharing interactions, which in turn provide an important arena in which joint attention skills develop over the first year of life.     

Beyond the Certainty of Security: On Dominant and Latent Conceptions of “Security” in Modern Societies

While other political programs have a relatively short history, the programatic logic of “security” is rather long-standing. This article argues that “security as a product” is a conception of modernity which came to its limits. The question arises, which kind of conception could he beyond those limits.     

New forms of writing,new visual competencies

This article discusses two crucial issues in the social semiotics of visual communication. The first is the move from accounts of specific semiotic modes towards an integrated multimodal approach to visual communication in which the analysis of images becomes less central than the analysis of semiotic resources such as composition, movement and colour, which are common to a range of semiotic modes including images, graphics, typography, fashion, product design, exhibition design and architecture. The second is a new emphasis on the discourses, practices and technologies that regulate the use of semiotic resources, and on studying the take‐up of semiotic resources by users in relation to these regulatory discourses, practices and technology. Here, the article will discuss a number of semiotic ‘regimes’, including codification, tradition, expertise, best practice or role modelling, and technological control. The article ends with a discussion of the way normative discourses are built into the latest visual communication technologies (e.g. PowerPoint, HTML, Photoshop, Illustrator) and an affirmation of the need for a critical and well‐contextualised semiotics of visual technology.     

Body Satisfaction and Sexual Health in Dutch Female University Students

Studies in the field of body image have primarily addressed its negative aspects, such as body dissatisfaction. The present study focused instead on women who are satisfied with their bodies and on how body satisfaction relates to sexual health. A sample of 319 Dutch female university students completed an online survey that included items about body image evaluation, body image investment, overweight preoccupation, body image affect during sexual activity, sexual frequency, sexual functioning, and sexual self-esteem. We found that the level of body dissatisfaction was minimal in our sample. The majority reported neutral or mildly positive body evaluations, and in 30% of the sample these evaluations were clearly positive. Comparisons between women who reported positive versus neutral body evaluations showed that the body-satisfied women had lower body mass indexes (BMIs) and reported less body image investment, less overweight preoccupation, and less body self-consciousness during sexual activity. With regard to sexual health, they reported higher sexual self-esteem and better sexual functioning. Furthermore, we found that body image self-consciousness was negatively associated with sexual functioning, sexual self-esteem, and frequency of sexual activity with a partner. Body satisfaction did not account for a portion of the relationship of body self-consciousness during sexual activity with sexual health.     

Ethical injunctions: the University of the Western Cape in the face of the ‘here and now’

This essay poses the question of the ethical in relation to the work of memorialising the University of the Western Cape (UWC) after apartheid. Drawing on Gilles Deleuze’s statement on the ethical in The Logic of Sense and reading its implications through Walter Benjamin’s ‘Theses on the Philosophy of History’ and Jeremy Cronin’s ‘Even the Dead’, I argue that the ethical entails becoming adequate to the fracturing of event, leading to an understanding of the subject effect prior to its stamping by race, gender and identity. The ethical, in this formulation, reckons with the materiality of the past as its weight orders the present. It is this possibility of becoming adequate, of ‘not being unworthy of what happens to us’, which is offered in Ingrid Masondo’s photo-essay on UWC. I read Masondo as offering an encounter with images of the Leibnizian world as they appear at UWC, an encounter that registers alternate trajectories as they are expressed in ‘point of view’. Becoming adequate, here, involves registering the role of UWC (both conscious and unconscious) in the subjectification of persons during and after apartheid. This essay punctuates the rhythm of the memorialisation of UWC, by asking that this weight of the past be reckoned with while articulating alternate trajectories for both the university (and particularly the disciplines of the humanities) and for the understandings of subjectivity that attend to it, a demand that cannot be settled cheaply.