Beyond the average: Detecting global singular nodes from local features in complex networks

Deviations from the average can provide valuable insights about the organization of natural systems. The present article extends this important principle to the systematic identification and analysis of singular motifs in complex networks. Six measurements quantifying different and complementary features of the connectivity around each node of a network were calculated, and multivariate statistical methods applied to identify singular nodes. The potential of the presented concepts and methodology was illustrated with respect to different types of complex real-world networks, namely the US air transportation network, the protein-protein interactions of the yeast Saccharomyces cerevisiae and the Roget thesaurus networks. The obtained singular motifs possessed unique functional roles in the networks. Three classic theoretical network models were also investigated, with the Barabasi-Albert model resulting in singular motifs corresponding to hubs, confirming the potential of the approach. Interestingly, the number of different types of singular node motifs as well as the number of their instances were found to be considerably higher in the real-world networks than in any of the benchmark networks. Copyright (C) EPLA, 2009

Continuous GRASP with a local active-set method for bound-constrained global optimization

Global optimization seeks a minimum or maximum of a multimodal function over a discrete or continuous domain. In this paper, we propose a hybrid heuristic-based on the CGRASP and GENCAN methods-for finding approximate solutions for continuous global optimization problems subject to box constraints. Experimental results illustrate the relative effectiveness of CGRASP-GENCAN on a set of benchmark multimodal test functions.

CONTINUITY OF GLOBAL ATTRACTORS FOR A CLASS OF NON LOCAL EVOLUTION EQUATIONS

In this work we prove that the global attractors for the flow of the equation partial derivative m(r, t)/partial derivative t = -m(r, t) + g(beta J * m(r, t) + beta h), h, beta >= 0, are continuous with respect to the parameters h and beta if one assumes a property implying normal hyperbolicity for its (families of) equilibria.

The role of local grouping and global orientation contrast in perception of orientation-modulated textures

We explored the contribution to perception of orientation-modulated textures of visual processes selective either for orientation contrast or orientation grouping. To distinguish between these two processes we manipulated the axis of local grouping of texture elements independently of the direction of global orientation modulation. The general question posed was whether visibility of texture structure (measured as threshold for discriminating spatial-frequency of texture structure) is dependent on the magnitude of orientation contrast, strength and direction of local grouping, or some combination of the two. We demonstrated that the factor of primary importance is the amplitude of global orientation contrast rather than the presence of local grouping content. Using orientation-interleaved textures (containing two superimposed textures modulated around orthogonal orientations), we further showed that orientation single-opponent processes are a more likely candidate for detecting orientation contrast than double-opponent processes.

Defining diversity and its relation to the local and global: a question of methodology

This paper emerges from research to define the dimensions of diversity and difference within a local Melbourne, Australian school and the requirement to understand these changes in times of increasing globalisation.

Think global, act local: from naive comparison to critical participation in the teaching of strategic international human resource management

In this paper, we examine the implications of ethnocentrism and paternalism in teaching approaches for the field of strategic international human resource management (SIHRM), as an example of management studies. We argue that the teaching of SIHRM has been approached in a colonizing fashion, joining and extending the territories of human resource management and organizational strategy through the definition and teaching of a new language and conceptual vocabulary. We explore philosophical approaches and processes involved in teaching SIHRM, and consider implications of pedagogical developments in this field of management education.

Valuing local built heritage in a global setting : identity & visual perceptions of cultural built heritage in Northern Ireland

‘In these troubled times with the world in search of its bearings and way ward minds using the terms “culture” and “civilization” in an attempt to turn human beings against one another, there is an urgent need to remember how fundamental cultural diversity is to humanity itself’ (UNESCO 2002). The progressive idea of culture can be used in regressive ways by extremists who used it occasionally to pursue the politics of xenophobia and exclusion. The hypothesis that different communities can share the same culture but have different visual perception of their built environment might seems contradictory. It is essential to describe what is meant by the ‘same culture’. The ever evolving changes of definition and re-definition of the word has not yet settled. This paper adopts the descriptive definition of culture while challenging its interpretation. The descriptive definition refers to ‘all the characteristics activities by a people’. While this description is generally accepted, the interpretation of what ‘a people’ means is divisive. It is not clear how Eliot defines ‘a people’. Is the term genetically prescribed or is ‘a people’ place related? And what about the moral and religious orientation? This paper argues that culture is basically place related and the forces that shape a culture of a ‘people’ are deeply embedded in the environmental forces that also shape other aspects of the place making and its identity. The paper addresses the questions of conflicts, value systems, and culture definitions and the inseparable links with architecture aesthetics.

Local built heritage in Northern Ireland is taken as a case study. Unlike many parts of the world, visual perceptions in Northern Ireland is well recognised with iconic as well as formal representations. The population is well aware of the signified as well as the signifiers. The boundaries between iconology and formalism theories are very blurred in the Northern Ireland context. This paper examines how the two communities visually perceive their shared built heritage and the extent of overlapping between the understanding of iconic and formalist visual representations in the built environment. The paper takes the buildings of the successful economic ventures of the shirt industry in the 19th century as a case study. The case study provides an insight of how a signified value of a successful economic regeneration initiative that is deeply imbedded in the social structure and within the urban fabric can overcome divisive visual perception. The paper examines the possibility of building upon the historical success of the shirt industry to promote architectural cultural dialogue in which cultural built heritage in Derry is able to facilitate knowledge creation and social capital in different arenas.

Transcultural literacy : between the global and the local

In this paper the authors draw on a larger project related to diasporic identification in order to explore the concept of transcultural literacy. They argue that transcultural literacy grows out of border-crossing dynamics that extend beyond the binaries of 'us' and 'them' as these are lived within and between nations. In this way it is responsive to, and reflects, the various shifts between the local and the global; between place and space. Transcultural literacy is inseparable from social and cultural practices of meaning- and identity-making on the fault-line between various and often competing cultures. This model of transcultural literacy uses theorisations of space to connect textual practices to the construction of hybrid identities. In so doing, it offers an alternative to models of literacy premised on liberal or neo-conservative understandings of cultural difference. In this paper, we explore transcultural literacy in relation to current literacy debates.

Performing Pedagogy and the re(construction) of global/local selves

The eighth chapter, written by Gayle Morris, is entitled “Performing pedagogy and the re (construction) of global/local selves.” Morris tackles a unique perspective with regard to globalization and education. A major characteristic of today’s globalized world is the diversity of people living within societies and communities. Classrooms in public schools and universities in the United States, Canada, Australia, and Britain are comprised of students from all parts of the world, a reality which is increasing the challenges faced by teachers and policy makers. Morris particularly discusses second language teaching and learning and the inadequacy of second language educators who are mostly approaching from “White/mainstream” positivist models and approaches to language teaching (p. 137). Morris highlights the “fixing” of immigrants and ethnic minority identity, and how the inefficient training of ESL teachers is affecting the global/ local selves of students. This chapter is invaluable contribution in this volume given the number of immigrants to western countries is on the rise.

Glonacalling doctorates?: The international and global connectedness of Australian PhD graduates

Simon Marginson and Gary Rhoades coined the term ‘glonacal’ the express the interconnectedness of global, national and local social relations, especially in terms educational systems and experiences. This paper presents some selected data from a recent ARC Discovery Project entitled Research capacity-building: the development of the Australian PhD programs in national and emerging global contexts. Some of selected data show the extent Australian PhD theses have addressed topics in South and East Asia as an illustration of how research capacity-building may be created in/for Australia through topics which address problems or ideas located in other (in this case East and South Asia) national and local contexts. Other data relate to the international movements of—particularly astronomy and chemistry—PhD graduates out of Australia, some of whom return to Australia. The paper discusses these movements in terms of PhD culture being ‘glonacal’ in nature from its programs and postdoctoral relations.

Children's literature in a global age : transnational and local identities

This essay explores the concept of transnationalism, defi ning this term in relation both to the lived experience of transnational subjects, and to transnational texts for children. It argues that rhetorics of globalization have over-emphasized the impact and signifi cance of global cultural and economic fl ows, although the production of children’s books is to some extent shaped by the internationalization of publishing houses and markets. The concept of transnationalism provides a way of thinking about how children’s texts address and are informed by diverse, complex infl uences, sometimes from a variety of cultures and languages. Transnationalism is not a new phenomenon but is visible in colonial texts which are shaped both by the particular, local ideologies of colonial nations, and also by the common concerns and interests of such nations. The essay draws on two contemporary texts to illustrate the workings of transnationalism: the fi lm Howl’s Moving Castle, and Shaun Tan’s picture book The Arrival. It concludes by considering the concept of transnational literacy as a way of approaching scholarship and teaching in children’s literature.

Damage identification of steel beams using local and global methods

Structural condition monitoring methods can be generally classified as local and global. While the global method needs only a small number of sensors to measure the low-frequency structural vibration properties, the acquired information is often not sufficiently sensitive to minor damages in a structure. Local methods, on the other hand, could be very sensitive to minor damages but their detection range is usually small. To overcome the drawbacks and take advantage of both methods, an integrated condition monitoring system has been recently developed for structural damage detection, which combines guided wave and structural vibration tests. This study aims at finding a viable damage identification method for steel structures by using this system. First, a spectral element modelling method is developed, which can simulate both wave propagation and structural vibration properties. Then the model is used in updating analysis to identify crack damage. Extensive numerical simulations and model updating works are conducted. The experimental and numerical results suggest that simply combining the objective functions cannot provide better structural damage identification. A two-stage damage identification scheme is more suitable for identifying damage in steel beams.