Are the popular users always important for information dissemination in online social networks?

This article verifies the importance of popular users in OSNs. The results are counter-intuitive. First, for dissemination speed, a large amount of users can swiftly distribute information to the masses, but they are not highly-connected users. Second, for dissemination scale, many powerful forwarders in OSNs cannot be identified by the degree measure. Furthermore, to control dissemination, popular users cannot capture most bridges of social communities.

Bayesian nonparametric multilevel clustering with group-level contexts

We present a Bayesian nonparametric framework for multilevel clustering which utilizes group- level context information to simultaneously discover low-dimensional structures of the group contents and partitions groups into clusters. Using the Dirichlet process as the building block, our model constructs a product base-measure with a nested structure to accommodate content and context observations at multiple levels. The proposed model possesses properties that link the nested Dinchiet processes (nDP) and the Dirichlet process mixture models (DPM) in an interesting way: integrating out all contents results in the DPM over contexts, whereas integrating out group-specific contexts results in the nDP mixture over content variables. We provide a Polyaurn view of the model and an efficient collapsed Gibbs inference procedure. Extensive experiments on real-world datasets demonstrate the advantage of utilizing context information via our model in both text and image domains.

Can music therapy in medical contexts ever be evidence-based?

This essay seeks to consider some of the issues around evidencethat provide an ongoing challenge to the profession of music therapyto be vigilant and critical with regards the undertaking, butalso the appropriation or application, of research in our alliedhealth discipline. It is written in response to the statement that“medical music therapists need to continue to discuss and debateour views as to what constitutes knowledge, expertise and ‘evidence’in our profession.” (Edwards, 2002, p. 33). A critical perspectiveto current demands for evidence is provided, and the useof quantitative method as the basis for trustworthy research inmusic therapy is discussed. The paediatric medical context is themain site of professional research of the author, however, some ofthe points made will have relevance for other fields of clinicalservice.

Investigating the efficacy of an intelligent operation planning and support tool for acute healthcare contexts

Nurses are the largest group of healthcare professionals in hospitals providing 24-hour care to patients. Hence, nurses are pivotal in coordinating and communicating patient care information in the complex network of healthcare professionals, services and other care processes. Yet, despite nurses' central role in health care delivery, intelligent systems have historically rarely been designed around nurses' operational needs. This could explain the poor integration of technologies into nursing work processes and consequent rejection by nursing professionals. The complex nature of acute care delivery in hospitals and the frequently interrupted patterns of nursing work suggest that nurses require flexible intelligent systems that can support and adapt to their variable workflow patterns. This study is designed to explore nurses' initial reactions to a new intelligent operational planning and support tool (IOPST) for acute healthcare. The following reports on the first stage of a longitudinal project to use an innovative approach involving nurses in the development of the IOPST; from conceptualization to implementation.

Improving online communication for students in higher education contexts

The study reported here sought to identify Higher Education students’ preferred modes of online communication whilst studying a wholly online research subject at University. The teacher education student participants from an Australian university were required to collaboratively conduct inquiry research projects in groups whilst relying upon computer-mediated communication. How do students communicate as a collaborative research group whilst only meeting online? The data were collected via the use of online pre-test and post-test surveys conducted ‘prior to’ and ‘post’ involvement in the unit of study and descriptive statistical analysis was applied. The findings revealed that important influences affecting students’ choice of communication mode included their own views on the capacity of online communication, their prior experience and the availability and accessibility of the modes. Furthermore, it was found that when given a choice, students preferred the use of asynchronous forms of digital communication to synchronous forms. Recommendations for improving online teaching, learning and research contexts in Universities are provided and the importance of considering blended mode delivery for wholly online units is argued.

Digital shimmer: popular music and the intimate nexus between fan and star

Conception of ‘star performance’ through popular music is stratified which generates diverse and often contradictory forms of thought. For example, stars and celebrities plausibly act as a ‘culture medium’ in which, through imagination, one’s identity is assembled, realised or constructed. What to become and how to be are questions we individually and collectively contend with throughout our lives to varying degrees (Maslow, 1954; 1968). Predominant use of digital technologies has seen the delivery of sound much altered. Music, be it Giuseppe Verdi’s La Traviata or Iron Maiden’s The Number of the Beast, once sourced via analogue legacy devices such as ‘old-school’ tape cassette or vinyl record is now a series of zero and one digits. Advocates argue that the key benefit of digitalisation is the ability to compress data because sound generates large files of information. The discourse of digitalisation begs the question of how a series of ones and zeros, albeit in a plethora of configurations, registers with listening bodies and affects ‘the sublime’. It is without doubt that some musical experiences afford indescribable, unlocatable sensation—even enchantment (as defined by Bennett, 2001: 5 and called forth by Redmond: 2014: 126). Such musical experiences might be in the presence of the performer or in their absence such as in the case of recorded music. In this context, any sense of ’real’ space and place is less definitive allowing for ‘special encounters’ to be imagined and felt. For these reasons, music and all that the use of the word might convey, the proposed notion of phaino-ken here, acts as the lens through which to examine the meaning and value of celebrity and star embodiment.

Mechanisms underpinning use of new walking and cycling infrastructure in different contexts: mixed-method analysis

BACKGROUND: Few studies have evaluated the effects of infrastructural improvements to promote walking and cycling. Even fewer have explored how the context and mechanisms of such interventions may interact to produce their outcomes. METHODS: This mixed-method analysis forms part of the UK iConnect study, which aims to evaluate new walking and cycling routes at three sites - Cardiff, Kenilworth and Southampton. Applying a complementary follow-up approach, we first identified differences in awareness and patterns of use of the infrastructure in survey data from a cohort of adult residents at baseline in spring 2010 (n = 3516) and again one (n = 1849) and two (n = 1510) years later following completion of the infrastructural projects (Analysis 1). We subsequently analysed data from 17 semi-structured interviews with key informants to understand how the new schemes might influence walking and cycling (Analysis 2a). In parallel, we analysed cohort survey data on environmental perceptions (Analysis 2b). We integrated these two datasets to interpret differences across the sites consistent with a theoretical framework that hypothesised that the schemes would improve connectivity and the social environment. RESULTS: After two years, 52% of Cardiff respondents reported using the infrastructure compared with 37% in Kenilworth and 22% in Southampton. Patterns of use did not vary substantially between sites. 17% reported using the new infrastructure for transport, compared with 39% for recreation. Environmental perceptions at baseline were generally unfavourable, with the greatest improvements in Cardiff. Qualitative data revealed that all schemes had a recreational focus to varying extents, that the visibility of schemes to local people might be an important mechanism driving use and that the scale and design of the schemes and the contrast they presented with existing infrastructure may have influenced their use. CONCLUSIONS: The dominance of recreational uses may have reflected the specific local goals of some of the projects and the discontinuity of the new infrastructure from a satisfactory network of feeder routes. Greater use in Cardiff may have been driven by the mechanisms of greater visibility and superior design features within the context of an existing environment that was conducive neither to walking or cycling nor to car travel.

Popular imperialism, Scottish identity, and William Wallace in an Australian colonial city

The narrative of William Wallace holds a prominent position in the current conception of England as a negative referent for Scotland’s national identity—its binary “Other”, against which Wallace valiantly fought. This article considers a contrasting understanding of Scottish national identity from the late-nineteenth century, and explores the events surrounding the unveiling of a statue of William Wallace in Australia during the year of 1889. It illuminates how settlers interpreted this national hero in such a way that demonstrated loyalty to the Union and Empire, and accommodated a convergence of English, Scottish, Irish, and Welsh migrants in a British colonial city. The article highlights how statues, the ceremonies surrounding them, and their public reception help us to investigate the symbolic, ritualistic, and performative dimensions of identity formulation. It considers how public monuments, providing a sense of authority to particular groups, can marginalise others by acting to settle cultural competition, and will reflect on competing interpretations of the statue at its unveiling.

Tim Winton: the literary and the popular

An exploration of the fiction of Australian author Tim Winton, investigating his popular and literary appeal.

Impact of sport context and support on the use of a self-report measure for athlete monitoring

Athlete self-report measures (ASRM) are a popular method of athlete monitoring in high-performance sports. With increasing recognition and accessibility, ASRM may potentially be utilized by athletes from diverse sport contexts. The purpose of the present study was to improve understanding of ASRM implementation across different sport contexts by observing uptake and compliance of a newly implemented ASRM over 16 weeks, and investigating the perceived roles and factors influencing implementation. Athletes (n=131) completed an electronic survey at baseline and week 16 on their perceptions and experiences with ASRM implementation respectively. Despite initial interest, only 70 athletes attempted to use the ASRM. Of these athletes, team sport athletes who were supported by their coach or sports program to use the ASRM were most compliant (p < 0.001) with a mean compliance of 84 ± 21 %. Compliance for self-directed individual and team sport athletes was 28 ± 40 % and 8 ± 18 % respectively. Self-directed athletes were motivated to monitor themselves, and rated desired content and minimal burden as key factors for initial and ongoing compliance. Supported athletes were primarily motivated to comply for the benefit of their coach or sports program rather than themselves, however rated data output as a key factor for their continued use. Factors of the measure outweighed those of the social environment regardless of sport context, however the influence of social environmental factors should not be discounted. The findings of the present study demonstrate the impact of sport context on the implementation of an ASRM and the need to tailor implementation strategies accordingly. Key pointsAthletes perceive ASRM and the factors influencing implementation differently. Therefore, to encourage compliance, it is important to tailor implementation strategies to the athlete and their sport context to increase appeal and minimize unappealing factors.Athletes using an ASRM on their own accord typically favor a measure which meets their needs and interests, with minimal burden.Athletes using an ASRM under the direction and support of their coach or sports program typically favor feedback and a positive social environment.

Continuous discovery of co-location contexts from Bluetooth data

The discovery of contexts is important for context-aware applications in pervasive computing. This is a challenging problem because of the stream nature of data, the complexity and changing nature of contexts. We propose a Bayesian nonparametric model for the detection of co-location contexts from Bluetooth signals. By using an Indian buffet process as the prior distribution, the model can discover the number of contexts automatically. We introduce a novel fixed-lag particle filter that processes data incrementally. This sampling scheme is especially suitable for pervasive computing as the computational requirements remain constant in spite of growing data. We examine our model on a synthetic dataset and two real world datasets. To verify the discovered contexts, we compare them to the communities detected by the Louvain method, showing a strong correlation between the results of the two methods. Fixed-lag particle filter is compared with Gibbs sampling in terms of the normalized factorization error that shows a close performance between the two inference methods. As fixed-lag particle filter processes a small chunk of data when it comes and does not need to be restarted, its execution time is significantly shorter than that of Gibbs sampling.