986 resultados para not odontogenic cyst
Resumo:
The precise rationale for, and timing of, the Northern Ireland peace process of the 1990s and beyond, which developed after more than two decades of conflict, has yet to be fully explained. It has been a common assumption that it arose from a stalemate involving the Irish Republican Army (IRA), the 'regular' pro-state forces of the British Army and Royal Ulster Constabulary and the 'irregular/ultra' pro-state loyalist paramilitary groups of the Ulster Volunteer Force (UVF) and Ulster Defence Association (UDA). Under this interpretation, military/paramilitary deadlock led to ripeness for peace, amid reappraisals by all parties to the conflict of the utility of violence accompanied by reinterpretations of earlier political orthodoxies. The IRA could not remove the British sovereign claim to Northern Ireland; British forces could not militarily defeat the IRA and loyalists and republicans were engaged in a futile inter-communal sectarian war. This stalemate thesis has obvious attraction in explaining why a seemingly intractable war finally subsided, but is less convincing when subject to empirical testing among republican and loyalist participants in the conflict. This article moves away from 'top-down' generalist narratives of the onset of peace, which tend to argue the stalemate thesis, to assess 'bottom-up' interpretations from the actual combatants as to why they ceased fighting. It suggests an asymmetry, rather than mutuality, of perception that there was 'military' cessation by the armed non-state groups, with neither republican nor loyalist interpretations grounded in notions of stalemate. The article concludes by urging a wider consideration of the important and persistent interplay of the military and political in conflicts such as Northern Ireland.
Pulsating or not? A search for hidden pulsations below the red edge of the ZZ Ceti instability strip
Resumo:
The location of the red edge of the ZZ Ceti instability strip is defined observationally as being the lowest temperature for which a white dwarf with a H-rich atmosphere (DA) is known to exhibit periodic brightness variations. Whether this cut-off in flux variations is actually due to a cessation of pulsation or merely due to the attenuation of any variations by the convection zone, rendering them invisible, is not clear. The latter is a theoretical possibility because with decreasing effective temperature, the emergent flux variations become an ever smaller fraction of the amplitude of the flux variations in the interior. In contrast to the flux variations, the visibility of the velocity variations associated with the pulsations is not thought to be similarly affected. Thus, models imply that were it still pulsating, a white dwarf just below the observed red edge should show velocity variations. In order to test this possibility, we used time-resolved spectra of three DA white dwarfs that do not show photometric variability, but which have derived temperatures only slightly lower than the coolest ZZ Ceti variables. We find that none of our three targets show significant periodic velocity variations, and set 95% confidence limits on amplitudes of 3.0, 5.2, and 8.8 km s(-1). Thus, for two out of our three objects, we can rule out velocity variations as large as 5.4 km s(-1) observed for the strongest mode in the cool white dwarf pulsator ZZ Psc. In order to verify our procedures, we also examined similar data of a known ZZ Ceti, HL Tau 76. Applying external information from the light curve, we detect significant velocity variations for this object with amplitudes of up to 4 km s(-1). Our results suggest that substantial numbers of pulsators having large velocity amplitudes do not exist below the observed photometric red edge and that the latter probably reflects a real termination of pulsations.
Resumo:
Purpose: This paper aims to examine the accountability practices of large United Kingdom (UK) charities through public discourse.
Design/methodology/approach: Based on the ethical model of stakeholder theory, the paper develops a framework for classifying not-for-profit (NFP) accountability and analyzes the content of the annual reports and annual reviews of a sample of large UK charities using this framework.
Findings: The results suggest that contrary to the ethical model of stakeholder theory, the sample charities’ accountability practices are motivated by a desire to legitimize their activities and present their organizations’ activities in a positive light. These results contradict the raison d’eˆ tre of NFP organizations (NFPOs) and the values that they espouse. Research limitations/implications: Understanding the nature of accountability reporting in NFPOs has important implications for preparers and policy makers involved in furthering the NFP agenda. New research needs to examine shifts in accountability practices over time and assess the impact of the recent self-regulation developed to enhance sector accountability.
Originality/value: This paper contributes to the NFP accountability literature by: first, developing a framework of NFP accountability through public discourse using the ethical model of stakeholder theory; and second, advancing the understanding of the accountability practices of large UK charities.
Resumo:
This article draws on a range of models from language studies, particularly from linguistic pragmatics, in order to elucidate patterns in the production and reception of irony in its social and cultural context. An expanded view of the concept of irony, it is suggested, allows for better modelling of the creative mechanisms which underpin it, and in doing so can open the way for a fuller understanding of humour production and reception. A consequence of this broader (five-fold) typology of irony is that it can help shed light on the cultural dynamic of irony. The article uses a range of examples from different media and the lay definitions and interpretations that ordinary (non-academic) users of the language use in the comprehension of irony. Insofar as it seeks to develop an overarching model of irony, this paper draws on a variety of textual examples from a variety of sources, ranging from corpus evidence, through a stand-up comedy routine, to political wall murals and their discursive re-conformation as humour in present-day Northern Ireland. Although the central discussion is supported by insights from other linguistic, cognitive and socio-cultural approaches, the theoretical framework which emerges, with its focus on language and communication in context, is situated squarely within contemporary linguistic pragmatics.