An attack-resistant hybrid data-privatization method with low information loss

We examine a recent proposal for data-privatization by testing it against well-known attacks, we show that all of these attacks successfully retrieve a relatively large (and unacceptable) portion of the original data. We then indicate how the data-privatization method examined can be modified to assist it to withstand these attacks and compare the performance of the two approaches. We also show that the new method has better privacy and lower information loss than the former method.

Polynomial based key predistribution scheme in wireless mesh networks

Wireless mesh networks (WMNs) have the ability to integrate with other networks while providing a fast and cost-saving deployment. The network security is one of important challenge problems in this kind of networks. This paper is focused on key management between mesh and sensor networks. We propose an efficient key pre-distribution scheme based on two polynomials in wireless mesh networks by employing the nature of heterogeneity. Our scheme realizes the property of bloom filters, i.e., neighbor nodes can discover their shared keys but have no knowledge on the different keys possessed by the other node, without the probability of false positive. The analysis presented in this paper shows that our scheme has the ability to establish three different security level keys and achieves the property of self adaptive security for sensor networks with acceptable computation and communication consumption.

In vivo chromatic aberration in eyes implanted with intraocular lenses

Purpose. To measure in vivo and objectively the monochromatic aberrations at different wavelengths, and the chromatic difference of focus between green and infrared wavelengths in eyes implanted with two models of intraocular lenses (IOL).


Methods. Eighteen eyes participated in this study: nine implanted with Tecnis ZB99 1-Piece acrylic IOL and nine implanted with AcrySof SN60WF IOL. A custom-developed laser ray tracing (LRT) aberrometer was used to measure the optical aberrations, at 532 nm and 785 nm wavelengths. The monochromatic wave aberrations were described using a fifth-order Zernike polynomial expansion. The chromatic difference of focus was estimated as the difference between the equivalent spherical errors corresponding to each wavelength.


Results. Wave aberration measurements were highly reproducible. Except for the defocus term, no significant differences in high order aberrations (HOA) were found between wavelengths. The average chromatic difference of focus was 0.46 ± 0.15 diopters (D) in the Tecnis group, and 0.75 ± 0.12 D in the AcrySof group, and the difference was statistically significant (P < 0.05). Chromatic difference of focus in the AcrySof group was not statistically significantly different from the Longitudinal chromatic aberration (LCA) previously reported in a phakic population (0.78 ± 0.16 D). The impact of LCA on retinal image quality (measured in terms of Strehl ratio) was drastically reduced when considering HOA and astigmatism in comparison with a diffraction-limited eye, yielding the differences in retinal image quality between Tecnis and AcrySof IOLs not significant.


Conclusions. LRT aberrometry at different wavelengths is a reproducible technique to evaluate the chromatic difference of focus objectively in eyes implanted with IOLs. Replacement of the crystalline lens by the IOL did not increase chromatic difference of focus above that of phakic eyes in any of the groups. The AcrySof group showed chromatic difference of focus values very similar to physiological values in young eyes.

Love and leadership: constructing follower narrative identities of charismatic leadership

Most extant research on charismatic leadership has an essentialist orientation that characterises it as leader behaviour, leader communication or follower dependency. Our approach is more discursively oriented. To research charismatic leadership, we used aesthetic narrative positivism, which undertook utilitarian as well as critical method. We examined followers' implicit narratives of their lived experiences of charismatic leadership in organisational settings. We examined metaphors for this experience. Most respondents identified with positive affect, a form of love story; a minority experienced negative affect, especially anger; and some experienced both positive and negative emotions. We posit that if one adopts a certain identity within the context of a dramatic narrative, one might be attributed with charismatic qualities by followers. In this way, we suggest that charismatic leadership might be less a gift from God and more a 'gift from followers'. © The Author(s) 2013.

Ethics of teaching with social media

This paper goes beyond the commonly held concerns of Internet safety, such as cyberbullying. Instead, it explores the ethical dilemmas we face as teachers when using social media, in particular social networks, in the classroom. We believe old ideas of respect and culture of care for children and young people need to be reconstructed around new media. This paper draws on the authors’ experience in teaching with, and researching students’ use of, social media in the classroom. In this paper we explore the ethical issues of consent, traceability, and public/private boundaries. We tackle the complex issue of the rights around virtual identities of the students followed by a discussion on the ethics of engaging students in public performance of curriculum and their lives. Finally we discuss the ethical dilemma involved in recognising and responding to illicit activity. While we reflect on our own response to these dilemmas and propose a dialogic process as the way forward, we also return to the argument that the e ethical choices are dilemmas in which most, if not all, options are unpalatable or impracticable.

Bloods, crips and southern cross soldiers: gang identities in Australia

Drawing on contemporary critical social theories and diverse methodologies, A Critical Youth Studies for the 21st Century explores the educational, employment, cultural and embodied issues that confront young people, and those who work with ...

“And yet we are still excluded”: reclaiming multicultural queer histories and engaging with contemporary multicultural queer realities

In this chapter, we contend that reclaiming multiculturalism entails engaging with and including sexual and gender diverse histories, heritages and contemporary realities. We explore the ongoing dilemmas, concerns and strategies in placing “multisexuality” and “multigender” on the “multicultural” agenda in Australia, particularly in relation to policy development and research. We discuss how “reclaiming multiculturalism” and the promotion of “global citizenship” requires a reclaiming of multicultural queer histories and heritages, achieved through decolonising research projects, postcolonising socio-political activist networks, and publications that engage with multiplicity in identities and communities, or “multiple lifeworlds”.

Power, regulation and physically active identities : the experiences of rural and regional living adolescent girls

Drawing on interpretations of Foucault's techniques of power, we explored the discourses and power relations operative between groups of girls that appeared to influence their participation in Physical Education (PE) and outside of school in sport and physical activity (PA) in rural and regional communities. Interviews and focus groups were conducted in eight secondary schools with female students from Year 9 (n = 22) and 10 (n = 116). Dominant gendered and performance discourses were active in shaping girls’ construction of what it means to be active or ‘sporty’, and these identity positions were normalised and valued. The perceived and real threat of their peer's gaze as a form of surveillance acted to further perpetuate the power of performance discourses; whereby girls measured and (self) regulated their participation. Community settings were normalised as being exclusively for skilled performers and girls self-regulated their non-participation according to judgements made about their own physical abilities. These findings raise questions about the ways in which power relations, as forged in broader sociocultural and institutional discourse–power relations, can infiltrate the level of the PE classroom to regulate and normalise practices in relation to their, and others, PA participation.

Peer research with young Muslims and the politics of knowledge production

Purpose – The purpose of this paper is to draw on the authors’ experiences as a team made up of both “insiders” and “outsiders” in order to investigate how an insider-outsider peer research method facilitates productive forms of research into the lives of young Muslims, and to contribute to debates about ways of knowing youth. The authors aim to shift focus from a common claim that peer research methods simply improve research about youth to more deeply investigate how they enable, as well as limit, the production of particular kinds of knowledge, in this case, about Muslim youth in Australia. Design/methodology/approach – The research aimed to explore how “ordinary” young Australian Muslims engage in civic life. Yet the authors were faced with the challenge of accessing and recruiting “ordinary” youth in times of Islamophobia, wherein Muslim communities expressed serious concerns about their voices being misinterpreted, misused and misappropriated. Therefore, the authors sought to utilise an approach of outsider-designed and guided research that was then shaped and executed by insider peer researchers. It is this research design and its execution that the authors interrogate in this paper. Findings – As well as affording the authors access and the elicitation of rich, complex and high-quality data, the approach also fostered more complex stories about young Muslim identities and experiences, and enabled the authors to contest some common and homogenising representations. It also allowed opportunities for fundamental issues inherent in these kinds of qualitative research methods to be made explicit. These include the politics of performativity and issues of positionality in the peer research process. The authors suggest that the “insider” and “outsider” approach succeeded not so much because it got the authors closer to the “truth” about young Muslims’ civic lives, but because it revealed some of the mechanics of the ways stories are constructed and represented in youth research. Originality/value – The originality and value of this paper lie in its contribution to a debate about the politics of knowledge production about young people and Muslims in particular, and in its effort to move forward a discussion about how to be accountable in youth research to the various communities and to one another in insider-outsider research teams.

Students' understandings of religious identities and relations: issues of social cohesion and citizenship

The focus in this article is on issues of social cohesion and citizenship as they relate to students' understandings of religion and religious identity. The article draws on data gathered from a study conducted at a highly diverse English comprehensive school and is set amid broader anxieties about religion, community disharmony and national identity in the United Kingdom. The high levels of religious diversity at the school were seen as supporting social cohesion - enabled in this context through students' understandings of religion and religious identities as socially contingent and supportive of a sense of agency. These understandings are aligned with a sophisticated and inclusive citizenship - one that is productive of democratic alliances and political agency and necessary in disrupting the narrow and problematic understandings of religion that can lead to social disharmony and conflict.

Children of the market : performativity, neoliberal responsibilisation and the construction of student identities

This paper draws on interview data gathered from a broader studyconcerned with examining issues of social justice, cultural diversityand schooling. The focus is on five students in Years 5 and 6 whoattend a primary school located on the edge of a class-privilegedarea in outer London. The children are all high achievers who are veryinvested in doing well in school and in life within the parametersof neoliberalism. The paper examines the ways in which neoliberaldiscourses of performativity and individual responsibilisationpermeate the children’s talk in relation to their understandings ofeducation and their future, and their worth and value as students.Such examination enriches the findings of important research in thisarea that draws attention to the ways in which neoliberal discourseshave become naturalised and taken-for-granted in what counts asbeing a good student and a good citizen. The paper problematisesthe individualism, competitiveness and anxiety produced by thesediscourses and provides further warrant for supporting students toidentify, challenge and think beyond them.

Sexual orientation and gender-identity in high functioning individuals with autism spectrum disorder.

When compared to typically-developing individuals, individuals with Autism Spectrum Disorder(ASD) demonstrated significantly higher sexual diversity, with higher rates of non-heterosexuality, and reported more gender non-conforming identities. The ASD group reported poorer mental health than typically-developing individuals and belonging to a sexual or gender-diverse group worsened this effect.