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11.
A biomechanical study of the human vertebral artery with implications for fatal arterial injury 总被引:8,自引:0,他引:8
We studied the biomechanical behaviour of ring and strip specimens from along the length of 18 vertebral arteries taken from 16 subjects aged 28-90 years, in order to consider some of the factors which may play a role in vertebral artery rupture. The method was chosen to allow a comparison between circumferential distension (ring samples) and longitudinal extension, (strip samples). The samples were extended between the jaws of a tensile testing apparatus until the specimen broke and a number of biomechanical parameters were derived. These were the percentage extension to break, the tensile strength, Young's modulus and the peak load. There were a number of important findings. The vertebral artery was shown to be susceptible to longitudinal stretching with a number of strip samples breaking when extended by as little as 16-20%. The tensile strength and load at peak of the strip specimens were correspondingly lower than for the ring samples. Marked intersubject variations were shown for all these parameters and prominent changes in behaviour occurred along the vertebral artery. This study indicates that the artery may be susceptible to head and neck movements which cause the vessel to stretch, and intersubject variations in behaviour may be one important explanation for the marked differences in outcome which appear to exist in subjects who suffer broadly similar head and neck insults. 相似文献
12.
Gene Stephens 《American Journal of Criminal Justice》1980,5(2):74-86
To a large, extent criminal justice agencies arereactive in nature and thus are at the mercy of evants beyond their control. The author suggest that use of futures research and forecasting
methods, followed by development of policy alternatives through futures planning techniques, will aid agencies in becomingproactive —being able to anticipate future trends and develop and choose among alternative policies demed most beneficial to achievement
of the goals and objectives of the agency. Some techniques of futures research are discussed as is the efficacy of presentation
of findings in the form of scenarios. 相似文献
13.
Burns FR 《International journal of law and psychiatry》2005,28(3):300-319
Australia, like other western nations, is facing the prospect that in the decades ahead the overall population will age dramatically. This article considers legal issues associated with the aged and intergenerationally transmitted debt. It will be argued that the present legal regulation of guarantees is a complex amalgam of case law, statute and finance industry self-regulatory codes which does not necessarily or adequately take into account the particular vulnerabilities of the aged and the very old or the intergenerational pressures which they may confront. It may be necessary to take significant steps to protect vulnerable elders while still recognizing their rights to exercise personal autonomy. Some proposals for reform are made. 相似文献
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John P. Burns 《当代中国》1999,8(20):67-87
As a result of its autonomy from society and institutional integrity, both legacies of British colonialism, the transition of the Hong Kong civil service to Chinese rule has been smooth. To accommodate continuing changes to state‐society relations, however, the civil service must begin sharing power with society to ensure stability. This paper examines changes in the state‐society and inter‐state sectors since the 1 July 1997 handover. 相似文献
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This article conceptualizes and analyses a type of complex social organization consisting of heterogeneous organizing modes and social relationships, combining, for instance, relationships making up markets and hierarchies as well as various types of informal networks. Each mode is constituted and regulated on the basis of a system of social rules making up a particular normative order and operates in terms of its own particular rationality or social logic. When modes are combined or integrated into multi-institutional complexes or organizations, the resultant structure entails zones of incongruence and tension at the junctures or interfaces of the different organizing modes and social relationships. The article identifies a number of such incongruent organizing modes that are common in complex social organizations or inter- institutional complexes. It goes on to identify several of the institutional strategies and arrangements including rituals, non-task-oriented discourses, and mediating roles that actors develop and institutionalize in dealing effectively with incongruences and potential conflicts in complex, heterogeneous organizations. The article suggests that problems of structural incongruence - and the tensions and conflicts that arise in connection with it as well as responses to these - are major features of complex organizational and inter-institutional arrangements. Moreover, it suggests that social order - the shaping of congruent, meaningful experiences - in these complex organizations as in most social life builds on non-rational foundations such as rituals and non-instrumental discourses. These contribute to maintaining social order and to providing a stable context, even for rational decision-making and action. 相似文献
19.
George Burns 《European Journal on Criminal Policy and Research》1998,6(2):171-183
Concentrations of unemployment and crime are promoting a slow crisis in the lives of unskilled young men, and obstruct the successful re-integration and resettlement of offenders. At the same time, criminal justice system programmes for offenders are seeking a new balance between treatment approaches and the creation of opportunities. In this article the author reflects on the policy frameworks which give rise to these approaches, and considers the danger that criminal justice systems may place emphasis on diverting people from crime without directing them towards opportunities for re-integration. The author considers the needs of offenders in relation to housing and employment in particular. 相似文献
20.
AbstractDeinstitutionalisation movements of the mid-1900s led to changes in policy and practice in the management of people with special needs (defined for this article as people with severe and persistent mental illness, intellectual disabilities and high levels of personality factors that interfere with treatment participation). Although the majority of clients with special needs receive care in community settings and interact more with family, friends and others in the community, some such clients require more rigorous case management. For clients who have offended, especially sexually, community-based services are scarce, and concerns regarding reoffence potential often supersede traditional understandings of diminished capacity. Recent reports suggest that jails and prisons have replaced hospitals as the institutions-of-choice for clients with special needs who engage in inappropriate conduct. This paper examines policies and practices regarding community risk management of people with special needs who have sexually offended. Vignettes are provided to illustrate how some clients and agencies have been affected, and suggestions are made to ensure best practices in risk management and public safety. 相似文献