Gap distribution of Farey fractions under some divisibility constraints

For a fixed positive integer d, we show the existence of the limiting gap distribution measure for the sets of Farey fractions a/q of order Q with a not divisible by d, and respectively with q relatively prime with d, as Q tends to infinity.Comment: 15 pages, revised versio

Young people and sexting in Australia: ethics, representation and the law

The Young People and Sexting in Australia report presents the findings of a qualitative study of young people’s understandings of, and responses to, current Australian laws, media and educational resources that address sexting. The project, led by Dr Kath Albury involved a review of both international local and academic research as well as popular media addressing sexting, and a review of educational resources for young people. Three focus groups were conducted with young people aged 16 and 17 in 2012, and a working paper based on those findings was then distributed to adult stakeholders in the fields of law enforcement, youth and children’s legal support, education, criminology, media and communications, youth work, youth health care, counseling and youth health promotion

The ingenuity of common workmen: and the invention of the computer

Since World War II, state support for scientific research has been assumed crucial to technological and economic progress. Governments accordingly spent tremendous sums to that end. Nothing epitomizes the alleged fruits of that involvement better than the electronic digital computer. The first such computer has been widely reputed to be the ENIAC, financed by the U.S. Army for the war but finished afterwards. Vastly improved computers followed, initially paid for in good share by the Federal Government of the United States, but with the private sector then dominating, both in development and use, and computers are of major significance.;Despite the supposed success of public-supported science, evidence is that computers would have evolved much the same without it but at less expense. Indeed, the foundations of modern computer theory and technology were articulated before World War II, both as a tool of applied mathematics and for information processing, and the computer was itself on the cusp of reality. Contrary to popular understanding, the ENIAC actually represented a movement backwards and a dead end.;Rather, modern computation derived more directly, for example, from the prewar work of John Vincent Atanasoff and Clifford Berry, a physics professor and graduate student, respectively, at Iowa State College (now University) in Ames, Iowa. They built the Atanasoff Berry Computer (ABC), which, although special purpose and inexpensive, heralded the efficient and elegant design of modern computers. Moreover, while no one foresaw commercialization of computers based on the ungainly and costly ENIAC, the commercial possibilities of the ABC were immediately evident, although unrealized due to war. Evidence indicates, furthermore, that the private sector was willing and able to develop computers beyond the ABC and could have done so more effectively than government, to the most sophisticated machines.;A full and inclusive history of computers suggests that Adam Smith, the eighteenth century Scottish philosopher, had it right. He believed that minimal and aloof government best served society, and that the inherent genius of citizens was itself enough to ensure the general prosperity

Flirting and friendship at the periphery of hook-up app research

&#x0D; &#x0D; &#x0D; The everyday intimacies of friendship and flirting are not typically exploredin hook-up app research, nor is there much reflection on the intimacies of researching these media. This paper considers flirting and friendship as practices and methods that broaden the scope of current hook-up app research. We ask what these intimacies can produce to expand research approaches (and thus knowledge) of hook-up apps. As users and researchers of these apps, we consider negotiations of flirting and friendship between researchers and research partici- pants by exploring what it means to research with intimacy. Attention is given to the connections, conversations, and intimate encounters within hook-up research that are mostly absent from existing presentations of research findings. We sug- gest that greater attention to peripheral and intimate communication between researchers and participants can offer valuable methods for queering otherwise stabilised ways of knowing, using, and researching these platforms. Adding to the queer ethnographic tradition, we demonstrate how a processual and affective approach to hook-up app use encourages researchers to make visible our connec- tions to the media we research, and how these connections relate to the intima- cies that hook-up apps foster.&#x0D; &#x0D; &#x0D; </jats:p

Spatial distribution of energy deposited in nitrogen by electrons

The spatial distribution of the energy deposited by kilovolt electrons moving through gaseous molecular nitrogen was measured. The range of electrons of initial energy 300 eV to 5 keV was obtained and can be expressed by the formula R=K1+K2EA1−K3EA2, where R is the range, E is the initial energy of the electrons, and Ki,Ai are constants. The range, in this energy interval, is greater than that determined by previous measurements. A source of error, not previously discussed, is considered. The energy region (above 1 keV) where the simpler expression R=KEA holds is discussed. It is shown that this is the energy region where the energy and range dependence of the energy deposition curve can be removed and a normalized, characteristic energy deposition curve λ can be obtained. The efficiency of conversion of electron energy at 1 keV and 280 μ pressure to energy of photons at 3914 Å was measured to be (0.28±0.03) %.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69995/2/JCPSA6-64-2-743-1.pd

Practicing sexual health: young people, sexual knowingness, and everyday intimacies

This thesis presents a discursive analysis of young people’s sexual health in contemporary Australia, engaging with data from health promotion, social sciences, and interviews with young people. Data comprises: Australian sexual health websites for young people (N=3); research papers on young people and chlamydia in Australia, published from 2005-2009 (N=18); and interviews with young people aged 18-25, from Sydney (N=12). Using Michel de Certeau’s theory of everyday practice (1988), I explore young people’s experiences and knowledges of sexual health and how these exceed formal health understandings. I demonstrate how risk-based approaches typically deny young people’s sexual health competencies and dismiss the value of friendship and social networks. I propose revision of this deficit understanding of young people through an everyday practice based approach to sexual health. This differs from behavioural science approaches that can abstract young people’s sex practices from the context of their socio-sexual relations. Considering young people’s competencies and tactics in negotiating sex, I argue that these can inform health promotion strategies, making them more relevant and useful to young people. Early chapters analyse discourses of young people’s experience, risk and knowledge in these data, as key terms that justify young people’s inclusion in Australian sexual health policy. Later chapters explore discourses of pleasure and intimacies, including friendship intimacies. These commonly feature in interview data where participants’ stories highlight the spatial aspects of sex practices and negotiations. These often extend beyond sexual scenarios and into friendships. My thesis demonstrates how young people’s negotiations of safety encompass and exceed formal notions of ‘safe sex’, and draws a parallel between negotiations of safety and pleasure. I argue that a focus on safety is more useful than risk-based approaches, as it incorporates shared values of young people, health promotion, and sexual health research. Young people do not share a deficit understanding of their skills and practices, but are invested in sexual safeties, with common interview discussions of intimacy and its affordances. Finally, a case study of young people’s social media practices is presented, further highlighting friendship’s value to young people’s sexual health negotiations

Young people, social media, social network sites and sexual health communication in Australia: ‘this is funny, you should watch it

Social media and social network sites (SNS) are an evolving area for sexual health communication with young people. They present opportunities and challenges for sexual health professionals and young people alike, such as learning through interactivity and addressing concerns about privacy. In this article, we present and discuss the findings from six rural and urban focus groups with young people in Australia about the use of social media and SNS for sexual health communication. We discuss a number of issues related to the use of social media and SNS for sexual health communication, such as concerns about bullying, privacy, and the stigma attached to sexual health