Density functional theory study of Na at Al(111) and O at Ru(0001)

The success of density functional theory for the description of the adsorption of atoms on surfaces is well established, and based on recent calculations using gradient corrections, it has been shown that it also describes well the dissociative adsorption of molecules at surfaces - admittedly however, the data base for reactions at surfaces is still somewhat small. In the present paper the power of density functional theory calculations is demonstrated by investigations for two different adsorption systems, namely, one with a strongly electropositive adsorbate [Na on Al(111)] and one with a strongly electronegative adsorbate [O on Ru(0001)]. In each case, new hitherto not expected adsorbate phases have been predicted by the theory: For Na on Al(111) the stability of a "four-layer" surface alloy was identified while for O on Ru(0001) it was predicted that the formation of a (1 x 1)-O adlayer should be possible which implies that the apparent saturation coverage of 1/2 is due to kinetic hindering.Comment: RevTeX, 24 pages, 6 figures in uufiles for

Ernest Gellner: an intellectual biography

Catherine Hezser finds that John A. Hall’s biography of one of the most prominent social anthropologists of our time provides fascinating reading on issues and debates which are still of utmost importance. Ernest Gellner: An Intellectual Biography. John A. Hall. Verso. 2011. Paperback edition

40 Years of FOIA, 20 Years of Delay: Oldest Pending Freedom of Information Requests Date Back to the 1980s

Presents findings from the Knight Open Government Survey, which surveys government offices and agencies on the status of their public information requests, and finds that extensive backlogs persist

Authentic housing, authentic culture?: transforming a village into a 'tourist site' in Manggarai, eastern Indonesia

Since the publication of MacCannell’s The tourist (1976), the issue of ‘authenticity’ has been at the centre of tourism studies. Whilst early analysts broadly agreed with MacCannell’s thesis that tourism, by turning culture into a commodity, replaced real with ‘staged’ authenticity (ibid, 91-107), more recent work has shown ‘an increased awareness of the social construction and invention of both tradition and authenticity’ (Wood, 1992: 57). That is, authenticity is increasingly seen as a socially constructed concept, with criteria for judgement of ‘the authentic’ varying greatly between different actors. In addition, analysts are moving away from rather naive considerations of the ‘impact’ of tourism on pristine, pre-tourist culture, to an appreciation that not only does tourism create a ‘space for discussion’ of tradition (see both Adams and Picard, this issue), but that its ‘impact’ is always bound up with local cultural politics (Wood, 1992: 67-8). In this paper, I describe an Indonesian tourism project – the ‘discovery’ of an apparently ‘untouched’ village and its remodelling into a ‘tourist site’ – in which issues of ‘authenticity’ played a central part. As I shall show, both concepts of authenticity and perceptions of what objects, practices or other aspects of culture should be the focus of talk about authenticity varied between state officials, ambitious young men, ritual elders and other villagers. Not only does the project I describe have implications for pan-Indonesian discourses on ‘culture’ and ‘ethnicity’, it also raises issues concerning the ways in which local people distinguish between different kinds of visitors, and how ‘tourism’ can have a profound impact on local perceptions of place and identity, even in the absence of large numbers of visitors

Don\u27t Bring a CAD File to a Gun Fight: A Technological Solution to the Legal and Practical Challenges of Enforcing ITAR on the Internet

This Essay begins by outlining Cody Wilson’s motivation to found his organization, Defense Distributed, and the organization’s progress toward its goals. Then, Part II provides a brief overview of the protracted legal battle between Wilson and the State Department over the right to publish Computer-Aided Design (CAD) files on the internet that enable the 3D printing of guns and lower receivers. Part III.A takes a brief look at whether these CAD files are rightly considered speech at all and, if so, what level of protection they might receive. Part III.B then addresses the problem of even asking whether the files are speech subject to regulation. Part III.B also highlights the similarities between regulating internet speech and regulating public-order crimes, focusing on the impact that enforcement problems in both areas can have on government credibility. It ultimately questions whether these legal battles provide any utility to society. In Part IV, this Essay argues that the State Department is utilizing old and incongruent regulations to enforce practically unenforceable laws to little or no effect, ultimately hurting the credibility of the State and martyring people like Wilson. This Essay advocates for a solution that focuses on 3D printer manufacturers as a control point for gun manufacturing. This solution avoids First Amendment issues and makes import and export control a physical reality, rather than an unbounded problem relegated to an open internet. This Essay looks beyond a judicial solution to practical solutions that stem the growth of in-house manufacturing of weapons

Affinity spaces on Facebook: a quantitative discourse analysis towards intercultural dialogue

info:eu-repo/semantics/publishe