如何行成关系数据模型到面向对象数据模型的映射

关系数据模型是基于记录的基本数据模型;面向对象数据模型是基于对象的基本数据模型;两种数据模型在某种程度上应存在相互映射和相互转变的可能性,它们的相互映射和相互转变将使关系数据库和面向对象数据库之间的转变成为可能。     

Can we remember differently? A case study of the new culture of memory in voluntary organisations

This article analyses the positive contribution that Slovenian voluntary, non–governmental organisations, users' organisations and community–based services in the field of mental health have made to the 'new culture of memory' of helpers and users. The conceptual differences between Slovenian psychiatric (institutional) treatment and voluntary community care are presented through the case study of Clare, a young woman who was diagnosed as a chronic schizophrenic. This example shows the importance of community care in voluntary organisations for the reduction of disability associated with mental disorders. The development of the new culture of memory in voluntary organisations and community–based services is not only the 'narrative turn' within social welfare, but also symbolises the 'implicit turn' in the relationship between the helper and the user. The real challenge of the new culture of memory in the process of help to disabled people (in respect of individuals working through traumatic memories) is that the helper can bear and support the user on a daily basis. During the process of their relationship, the deep implicit relational memories of both become activated and influence the change within the user as well as the helper.     

职场孤独感对员工帮助行为的影响 ——基于资源保存理论视角

基于资源保存理论视角,构建了一个有调节的中介模型,实证研究了职场孤独感对员工帮助行为的影响。结果显示：职场孤独感对员工帮助行为具有负向影响,关系认同在职场孤独感与员工帮助行为之间起中介作用,自我控制资源损耗负向调节了关系认同与员工帮助行为之间的关系,自我控制资源损耗调节了关系认同在职场孤独感和员工帮助行为之间发挥的中介作用。基于此,企业应重视员工的职场孤独感并加强管理,采取相应激励措施鼓励员工提高关系认同感,补充自我控制资源,从而降低职场孤独感对企业组织的不利影响。     

关系化用工:农业规模经营的社会基础

农业规模经营是中国乡村振兴进程中的关键议题。农业规模经营在快速发展的同时也呈现出用工效益的差异,从而使一些规模农业经营主体陷入困境。采用嵌入性视角探讨农业规模经营中用工模式嵌入社会关系的逻辑及其影响。研究发现,农业规模经营陷入困境的主要原因在于市场化用工无法有效解决农业规模经营中的劳动监督问题。而将市场规则嵌入关系规则的关系化用工使得雇佣双方产生了利他倾向,进而在很大程度上调动了工人内在的劳动积极性,从而使农业规模经营主体摆脱经营失败困境。关系化用工的实现依赖于农业规模经营主体在用工选择、生产管理和日常生活中充分发挥社会关系的积极作用,但社会关系范围和程度都是有限度的。因此,农业规模经营的健康发展不仅需要处理好经济关系,而且需要处理好社会关系。     

Sampling from spatial databases

This paper deals with techniques for obtaining random point samples from spatial databases. We seek random points from a continuous domain (usually ²) which satisfy a spatial predicate that is represented in the database as a collection of polygons. Several applications of spatial sampling (e.g. environmental monitoring, agronomy, forestry, etc) are described. Sampling problems are characterized in terms of two key parameters: coverage (selectivity), and expected stabbing number (overlap). We discuss two fundamental approaches to sampling with spatial predicates, depending on whether we sample first or evaluate the predicate first. The approaches are described in the context of both quadtrees and R-trees, detailing the sample first, acceptance/rejection tree, and partial area tree algorithms. A sequential algorithm, the one-pass spatial reservoir algorithm is also described. The relative performance of the various sampling algorithms is compared and choice of preferred algorithms is suggested. We conclude with a short discussion of possible extensions.     

Understanding Popularity and Relational Aggression in Adolescence: The Role of Social Dominance Orientation

This study investigated a potential moderator of the association between popularity and relational aggression: social dominance orientation (SDO), the degree to which an individual endorses the importance of social hierarchy. One hundred eighty‐five ninth graders completed a sociometric assessment of RA and popularity, and a self‐report SDO measure. SDO was positively associated with popularity for both boys and girls, and with RA for girls. Popularity and RA were positively correlated for both genders. Regression analyses showed that SDO moderated the association between popularity and RA for girls, but not for boys. Girls who were both popular and who were social dominance‐oriented were particularly high in peer‐nominated RA. SDO may provide a useful framework for understanding the role of popularity in adolescent peer groups.     

Enacting reflective and deliberative practices in action research

ABSTRACT

We consider action research as a form of deliberative policy analysis. This analysis explores a “reconstruction clinic” in which stakeholders and public officials engaged memories, hopes and obligations as they sought to resolve controversies over details of policy implementation. We ask how institutional design shaped participants’ reflective and deliberative progress. Reflection in action can prompt not only changes in cognitive frames, but new behavioural capacities for action. Deliberative practices can shape new relationships between parties through the work of apology, recognition, appreciation, and emergent collaboration.     

Decency and the Liberal International (Dis)Order: Moral Limits and the Possibilities of a Global Pluralist Politics

This article analyzes the tension between the liberal ideals of freedom and equality and cultural difference. It argues that decency has become intertwined with the fragility of the liberal international order by providing a problematic threshold of international justice. The idea is that as global pressures mount for protecting the human dignity of persons/peoples, they also congeal or harden decency’s political and social constraints (impartiality, neutrality, and basic rights enforcement) on engaging others. Decency as a moral threshold of international justice, the article claims, has become static or a self-reinforcing limitation. This contradictory decency/dignity dynamic of the liberal international order not only explains how states have aggressively asserted their interests by absorbing these constraints, but also how politics can limit the pragmatic potential to bridge the various social gaps in values and belief systems. This article seeks to conceptualize a pluralist ethos that shows how such constraints can be reimagined as, or turned into, the conditions of possibility/freedom that transition us to a global pluralist politics. It concludes with a discussion of the refugee crisis and Islamism, showing how both cases resonate the felt stigmatization and alienation within the liberal international order.     

Towards a Model of Working Groups

No abstract available for this article.