Particle acceleration and magnetic field structure in PKS 2155-304: optical polarimetric observations

In this paper, we present multiband optical polarimetric observations of the very-high energy blazar PKS 2155-304 made simultaneously with a HESS/Fermi high-energy campaign in 2008, when the source was found to be in a low state. The intense daily coverage of the data set allowed us to study in detail the temporal evolution of the emission, and we found that the particle acceleration time-scales are decoupled from the changes in the polarimetric properties of the source. We present a model in which the optical polarimetric emission originates at the polarized mm-wave core and propose an explanation for the lack of correlation between the photometric and polarimetric fluxes. The optical emission is consistent with an inhomogeneous synchrotron source in which the large-scale field is locally organized by a shock in which particle acceleration takes place. Finally, we use these optical polarimetric observations of PKS 2155-304 at a low state to propose an origin for the quiescent gamma-ray flux of the object, in an attempt to provide clues for the source of its recently established persistent TeV emission.

New Relativistic Atomic Natural Orbital Basis Sets for Lanthanide Atoms with Applications to the Ce Diatom and LuF3

New basis sets of the atomic natural orbital (ANO) type have been developed for the lanthanide atoms La-Lu. The ANOs have been obtained from the average density matrix of the ground and lowest excited states of the atom, the positive ions, and the atom in an electric field. Scalar relativistic effects are included through the use of a Douglas-Kroll-Hess Hamiltonian. Multiconfigurational wave functions have been used with dynamic correlation included using second-order perturbation theory (CASSCF/CASPT2). The basis sets are applied in calculations of ionization energies and some excitation energies. Computed ionization energies have an accuracy better than 0.1 eV in most cases. Two molecular applications are inluded as illustration: the cerium diatom and the LuF3 molecule. In both cases it is shown that 4f orbitals are not involved in the chemical bond in contrast to an earlier claim for the latter molecule.

Att skapa en trovärdig ljudupplevelse : Intentioner och genomförande av ljudläggningar i dokumentärfilm

Denna uppsats är en hermeneutiskt inspirerad studie som undersöker hur dokumentärfilmskapare ljudlägger sina filmer och vilka intentioner som ligger bakom deras ljudläggningar.Genom kvalitativa intervjuer med tre dokumentärfilmskapare som är väletablerade i den svenska filmbranschen ska läsaren få inblick och ökad förståelse för ljudläggningsarbete i dokumentära filmer. Det empiriska materialet som samlas in genom intervjuerna analyseras med hjälp av två filmljudanlysmodeller som är tagna ur långfilmssammanhang. Dessa modeller möjliggör en tolkning och värdering av intervjusvaren ur ett vetenskapligt perspektiv. Resultat av studien visar likheter och variationer i de intervjuade respondenternas tanke- och arbetssätt. Det är möjligt att applicerar nästan all empiriskt material på teorierna som syftar på ljudläggningar för spelfilms- och biografproduktioner trots att respondenterna inte alls är medvetna om det. Alla tre intervjupersoner ljudlägger utifrån ett självlärd och ibland ganska intuitivt arbetssätt.

Differences in the Effects of Social Context on Emotional Responding

This study compares the effects of social cues on emotional experiences of men and women. Literature suggests that emotional responses are influenced by the presence and expressiveness of other individuals (Hess, Banse, & Kappas, 1995; Jacobs, Manstead, & Fischer, 2001; Fridlund, 1991). We examined whether social cues influence the experience of emotions differently for men and women. Research on gender differences in self-construal (Cross & Madson, 1997) led us to expect that women’s own emotional reactions would be more sensitive to emotional cues from other individuals than men’s.

Straight to the source : an exploratory study of Australia's regional newspaper journalists' checks on validity and accuracy of sources

This paper reports on an exploratory study that examined whether journalists
undertake the vital role of checking the validity and accuracy of information
supplied to them in media releases. It also monitored how much information
journalists used from press releases in their published work. The study followed Gandy's information subsidy theory by surveying 10 local government media relations officers who regularly issued media releases via
electronic mail or facsimile to a sample of 14 rural/regional newspapers. The data analysed found that rural/regional journalists were not adequately verifying information supplied in media releases and using a significant amount of this information verbatim.

Play it again, Sam : How journalists cashed in on Youtube's favourite koala

The world was captivated when footage of a badly burnt koala drinking water from a Victorian firefighter's bottle was uploaded to You Tube in February 2009. When the story of "Sam the Koala" was adopted by the mainstream media, recombinant themes were used to construct her story - from heroism and patriotism to villain vs victim and romance. While scholars have examined the changing role of the journalist in a converged world and the rise of "soft" news, this paper focuses on the way journalists create disjointed narratives around You Tube footage to extend a story s lifespan. We call these new narrative forms "fractured fairy tale news" to describe this emerging phenomenon of convergence culture. Further, we suggest that news media exploit the YouTube community for their own commercial gain and conclude that the fractured fairy tale style is a poor vehicle for the future of news.

Diverse approaches : a study of Australian journalism educators' use of web-based curriculum modules for reporting cultural difference

The Reporting Diversity website provides four curriculum modules to assist journalism educators to teach students about the issues and practice of reporting on cultural difference. The researchers co-ordinated the second round of trials of these resources in 2009, which involved the participation of academics and students from five Australian universities. A further 30 academics were surveyed to gauge their level of awareness of the materials. This paper reports on the educators’ evaluation of the resources and reveals the innovative ways in which the modules are being used and adapted in different classroom settings. The researchers argue that sharing different teaching approaches to the materials through the Reporting Diversity website would assist other academics to adapt the resources for their own use.

In the tracks of Blinky Bill : How Sam the koala led news journalists into an Australian literary tradition

The world was captivated when footage of a badly burnt koala taking water from a Victorian Country Fire Authority volunteer was taken with a mobile phone and broadcast to the world on YouTube in February 2009. When the story of ‘Sam the Koala’ was subsequently adopted by traditional broadcast and print media, recombinant themes were used to construct her story – from heroism, patriotism, villain v victim - even romance was incorporated to entertain and create audience appeal. This paper explores how ‘Sam the Koala’ became a defining news story in the coverage of Victoria’s Black Saturday bushfires and examines the power of narrative when cross pollination occurs between new and traditional media in the production of news. It is argued that Sam’s story is evidence of journalists adopting new approaches to storytelling in a bid to retain their legitimacy as the authoritative voice of news and information in an increasingly technologically driven society.

A complex connection : community newspapers and tiers of social capital

At a time when newspaper circulations across the globe are plummeting, there is increasing interest in the concept of `local over global' and research linking small newspapers with the `strength of community'. There has been a myriad of definitions on social capital including Coleman, Bourdieu and Putnam which focus on the value of the strength of relationships formed by individuals and groups within communities. While newspaper circulation has been linked to community social capital, little attention has been paid to the way social capital works within the news organisation from those who produce news and information to those who read it. Given the complexity and multiplicity of the sociology of news production, this paper examines the role of organisational social capital in this process and argues Ronald Burt's theory of 'structural holes' (1997) may be an appropriate theoretical lens through which to consider this.

Teaching journalism students and regional reporters how to work with cultural diversity

This paper examines the effectiveness of a set of curriculum materials developed for a Reporting Diversity and Integration Project tailored for Australian journalists and journalism students. The materials take a problem-based learning (PBL) approach to a hypothetical case study that involves Muslim netballers being banned from competition because they want to wear headscarves during play. Deferring to ideas developed by Russian psychologist, Leo Vygotsky, we proposed a few ‘scaffolding’ strategies to support student learning. The material was trialed with 30 first-year Deakin University journalism students and 30 regional journalists. The responses showed that both groups felt the materials we added to the curriculum resources, which provided information on Muslim women and the headscarf, affected how they would write the story. They also thought it was important to provide this kind of information for readers. This paper argues that providing cultural information in an accessible format for students and journalists in newsrooms should be integral to education and training materials designed to improve media coverage of cultural diversity issues.

Blockbusters for the youtube generation : a new product of convergence culture

While scholars have paid much attention to YouTube in a Web 2.0 environment, the YouTube blockbuster is yet to be discussed as part of this convergence culture. It differs from transmedia storytelling in that no single company owns or controls the characters or concepts. Once users have elevated videos with rich narrative qualities to the heights of fame within YouTube and other virtual social networks, they are taken from the YouTube archive by global commercial media and given new exchange values in traditional media forms such as books, films, television shows and ancillary products, using fragmented classical narrative techniques to do so. This paper traces the history of the blockbuster as a way of large commercial media adapting to social and technological change after World War II, to its refinements in the 1970s to cater for younger audiences and changes in the media landscape, to its most recent incarnation in YouTube. We argue that the economic and cultural values of the blockbuster are being transformed and refigured by the new form it has begun to take within convergence culture.