The classification accuracy of four problem gambling assessment instruments in population research

Improved methodology was used to re-examine the weak correspondence between problem and pathological gamblers identified in population surveys and subsequent classification of these individuals in clinical interviews. The SOGS-R, the CPGI, the NODS and the Problem and Pathological Gambling Measure (PPGM), as well as questions about gambling participation and expenditures, were administered to a total of 7272 adults. Two clinicians then assessed each person's status, based on comprehensive written profiles derived from these questionnaire responses. Instrument classification was then compared to clinical classification. All four instruments correctly classified most non-problem gamblers (i.e. had good to excellent sensitivity, specificity and negative predictive power). However, the PPGM was the only instrument with good classification of problem gamblers (i.e. excellent sensitivity and positive predictive power). The CPGI and SOGS-R had weak positive predictive power and the NODS had only adequate sensitivity and positive predictive power. Improvement in the classification accuracy of the CPGI occurred when a 5+ cut-off was used and when a 4+ cut-off was used with the SOGS. In general, the classification accuracy of the NODS, SOGS and CPGI is better than prior research suggested but overall accuracy is still modest. With adjusted cut-offs, all three instruments are reasonably congruent with clinical ratings.     

Reflections on Changes in the Library and Serials Literature

Abstract

Johnson describes changes in library journal literature topics over the past one hundred years, with a focus on the period between her first Balance Point column in 2003 and this one, her last. She reminisces on her experience as a Balance Point column editor.     

多氢酸酸化技术及其应用

砂岩储层酸化的常规土酸体系存在与矿物反应速度快、酸化液的有效距离短和容易产生二次沉淀等问题。现存的缓速酸酸液体系不能克服粘土和石英界面反应速率的巨大反差，新的深度酸化工艺可以在一定程度上增加酸液的穿透距离，但工艺繁琐，且仍然不能解决沉淀、堵塞问题。多氢酸体系与现存的HF酸体系相比，其反应速度慢，溶解能力强，且具有良好的防垢性能和分散性能，可以抑制井眼附近的地层伤害，有效控制二次沉淀等优点。本研究对多氢酸的酸度特性、溶蚀性能、润湿性、静态腐蚀性以及多氢酸的分散和防垢性能进行了室内测试，并对土酸、氟硼酸及多氢酸进行了酸化效果实验评价。室内实验及现场应用表明，多氢酸性能优越，可明显提高酸化效果。     

聚合物/表面活性剂二元复合驱研究进展

从聚合物/表面活性剂二元体系的特点出发，综述了聚/表聚/表二元复合体系的实验室研究现状以及在胜利油田孤东七区54-61进行的矿场试验情况。聚/表二元复合驱是在聚/表/碱三元复合驱的基础上去掉碱所形成的低浓度的驱油体系，可以最大限度地发挥聚合物的粘度和弹性，减少乳化液处理带来的负面影响，减弱由于碱的存在引起的地层以及井筒结垢的现象。通过国内外研究结果分析表明，聚/表二元复合体系提高原油采收率幅度在20%左右；矿场试验取得了较好的效果。聚/表二元复合体系可以克服三元体系的缺点，作为一项新的驱油方法具有宽阔的发展空间。     

浅论位移电流

位移电流是普通物理中一个较重要的概念,也是教学中的一个难点.本文从位移电流概念的提出及实验验证,位移电流的物理意义及其与传导电流异同等几方面对其加以阐述,以求对位移电流的教学有所帮助.     

论德育场与德育新思维观

“德育场”作为自然场的派生物 ,其本质特征是重视德育系统与过程中各要素的能量、信息辐射、吸引力以及相互作用 ,与传统德目主义、整体主义德育模式的“控制”、“强化”教育相比 ,场思维的德育模式更重视对德育对象的民主诱导和德育过程的双向互动。德育场的核心要素是吸引子 ,吸引子按其价值取向可分为主导吸引子、辅助吸引子、异构吸引子 ,它们彼此按照耦合原理、役使原理、涨落原理与自发对称破缺原理进行运作。     

中国上市公司终极控制权及其与东亚、西欧上市公司的比较分析

本文运用终极产权论对上市公司的控股主体进行分类,通过追踪上市公司终极控制股东,发现在1260家样本公司中,终极控制股东拥有的控制权平均为43.67%,而其投入的现金流平均只有39.33%,就是说控制股东投入的现金流显著小于其获得的控制权,有4.34%的差异,两者的比值为0.890。在三种终极控制股东中,家族企业投入了相对较少的现金流量,却取得了相对较多的控制权,控制权和现金流量权的偏离达到了49.16%。同时,通过对中国上市公司和东亚、西欧国家的上市公司进行比较分析,得出了许多有意义的结论。     

Old Structures,New Relations: How Community Development Credit Unions Define Organizational Boundaries

Studies of organizational dynamics examine the manner in which an organization's immediate environment defines the rules and requirements to which individual organizations must conform in order to receive legitimacy and support (Scott, 1992:132). In this paper we consider the question of how an organization can achieve legitimacy and support without necessarily compromising its organizational forms or practices to isomorphic pressures. We frame the question in terms of the boundaries between organizations and their environments. Where the population ecology studies show the survival value of adopting known organizational forms and practices, and neoinstitutionalism addresses the need to display compliance with accepted forms, our case study demonstrates the possibility of removing an organization or set of organizations from the familiar interaction by naming it as a subfield of the organizational field, sharing the environment, but out of the way of predefined norms and practices.     

从革命话语到建设话语的转变--中国政治话语的语义分析

建国50年来,中国政治话语体系经历了从革命话语体系向建设话语体系的转变.本文分析了这两套政治话语体系的建构过程,并对其特征进行了探讨.本文认为,革命话语是毛泽东时代的政治交流方式,这套话语体系最显著的特征就是保证社会、个人与国家权力话语的高度一致,以适应国家在经济上的高度集权管理和在思想文化上的严格控制.改革开放后中国的政治话语是围绕"建设"或"现代化"而建构起来的,它包括"国家建设"、"经济建设"、"制度建设"和"文化建设"的四个语义场.     

铁环型周期磁场摇摆器的实验研究

设计了一种铁环型周期磁场摇摆器。对此摇摆器的磁场做了细致测试。结果表明,实验与理论设计很好相符。当螺旋线管电流为133A 时,摇摆器可产生0.055T 的远轴径向磁场强度。该磁场强度能满足低能束自由电子激光的要求。本实验可作为其它摇摆器设计时的参考。