Mean field baryon magnetic moments and sumrules

New developments have spurred interest in magnetic moments ($\mu$-s) of baryons. The measurement of some of the decuplet $\mu$-s and the findings of new sumrules from various methods are partly responsible for this renewed interest. Our model, inspired by large colour approximation, is a relativistic self consistent mean field description with a modified Richardson potential and is used to describe the $\mu$-s and masses of all baryons with up (u), down (d) and strange (s) quarks. We have also checked the validity of the Franklin sumrule (referred to as CGSR in the literature) and sumrules of Luty, March-Russell and White. We found that our result for sumrules matches better with experiment than the non-relativistic quark model prediction. We have also seen that quark magnetic moments depend on the baryon in which they belong while the naive quark model expects them to be constant.Comment: 7 pages, no figure, uses epl.cl

Human computer interaction with a PIM application: Merging activity, location and social setting into context

This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2009 Springer VerlagPersonal Information Managers exploit the ubiquitous paradigm in mobile computing technology to integrate services and programs for business and leisure. Recognizing that every situation is constituted by information and events, this context will vary depending on the situation users are in, and the tasks they are about to commit. The value of context as a source of information is highly recognized and for individual dimensions context has been both conceptually described and prototypes implemented. The novelty in this paper is a new implementation of context by integrating three dimensions of context: social information, activity information and geographical position. Based on an application developed for Microsoft Window Mobile these three dimensions of context are explored and implemented in an application for mobile telephone users. Experiment conducted show the viability of tailoring contextual information in three dimensions to provide user with timely and relevant information

Registering ideology in the creation of social entrepreneurs: intermediary organizations, 'ideal subject' and the promise of enjoyment

Research on social entrepreneurship has taken an increasing interest in issues pertaining to ideology. In contrast to existing research which tends to couch ‘ideology’ in pejorative terms (i.e. something which needs to be overcome), this paper conceives of ideology as a key mechanism for rendering social entrepreneurship an object with which people can identify. Specifically, drawing on qualitative research of one of the most prolific social entrepreneurship intermediaries, the Impact Hub, we investigate how social entrepreneurship is narrated as an ‘ideal subject’ which signals toward others what it takes to lead a meaningful (working) life. Taking its theoretical cues from Luc Boltanski’s theory of justification and from recent affect-based theorizing on ideology, our findings indicate that becoming a social entrepreneur gets framed less as a matter of struggle, hardship and perseverance than of ‘having fun’. We caution that the promise of enjoyment which pervades portrayals of the social entrepreneur might cultivate a passive attitude of empty ‘pleasure’ which effectively forecloses the properly political. The paper concludes by discussing the broader implications this hedonistic rendition of social entrepreneurship has, thus suggesting a re-politicization of social entrepreneurship through a confronting with the ‘impossible’