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关键词： Personalized Recommender Systems   Social Presence   Self-referencing   Apps   Perceived Accuracy   Perceived Novelty   ELABORATION LIKELIHOOD MODEL   E-COMMERCE   BUSINESS INTELLIGENCE   WEB PERSONALIZATION   VARIABLE IMPORTANCE   ONLINE   PERSUASION   ADOPTION   TECHNOLOGY   BEHAVIOR  

摘要： Personalized recommendations are generated by considering the preferences of a target user and similar users. Although explanations of recommendations affect the evaluations of personalized recommender systems (PRS), PRS evaluations have focused primarily on the perceived accuracy and novelty of the recommending algorithms. The goal of this study is to examine the effectiveness of using social interaction factors (self-referencing and social presence) to explain PRS. We developed six PRS for applications (apps) on smartphones by varying the level of social presence and self-referencing. We conducted Web-based experiments using these six types of PRS, and we then obtained participant evaluations of their social interactions and PRS. Our research model is designed to determine how social interactions, such as social presence and self-referencing, affect perceived accuracy and novelty, and in turn, how these affect satisfaction and intent to purchase. The results obtained demonstrate that the social context significantly increases the perceived accuracy and novelty of PRS. The results explain that perceived accuracy and novelty positively influence user satisfaction, and how satisfaction and perceived novelty affect purchase intention. In addition, we verify the effect of mediation on perceived accuracy, perceived novelty, and satisfaction. Thus, by integrating PRS performance and social interaction, this research contributes to improving our understanding of the social cognitive process related to user evaluation of PRS.

关键词： Odontogenic tumors   Odontogenic cysts   Odontogenic keratocyst   Keratocyst odontogenic tumor   GENOMIC ANCESTRY   POPULATION   COLOR  

摘要： Purpose: The aim of this study was to evaluate the impact of the reclassification of odontogenic keratocyst (OK) as a tumor on the prevalence profile of odontogenic cysts (OCs) and odontogenic tumors (OTs). Study design: Two referral Oral and Maxillofacial Pathology services in Brazil were evaluated. All cases diagnosed as OCs or OTs were selected and classified according to the 1992 WHO-classification (cases before 2005 WHO classification of tumors excluding OKC) and the 2005 WHO classification of tumors, going forward including cases of odontogenic keratocyst tumor (KCOT). The frequency and prevalence of OCs and OTs were compared before and after the reclassification. Results: Among 27,854 oral biopsies, 4920 (17.66%) were OCs and 992 (3.56%) were OTs. The prevalence of OTs before 2005 WHO classification of tumors was 2.04%, while the prevalence after 2005 WHO classification was 11.51% (p < 0.0001). Before 2006, the most frequent tumor diagnosed was odontoma with 194 cases (39.67%), and after 2005 WHO classification of tumors the KCOT was the most frequent with 207 cases (41.07%). Conclusions: The increase in the prevalence of OTs after 2005 WHO is related to the improvement of pathology services and to the inclusion of KCOT in the OTs group. (C) 2016 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

关键词： 土地开发   土地资产化   城市经济增长   公共服务设施   结构方程模型  

摘要： 已有文献对土地开发、土地收入与城市经济增长间的关系进行了大量探讨,但未能揭示土地开发对城市经济增长的作用机制和传导路径,尤其是没有区分土地开发对城市经济增长的直接和间接影响,直接影响主要是土地开发收入用于城市基础设施建设带来的投资效应,间接影响包括土地开发收入通过改善城市基础设施和公共服务、增强对产业和人口的吸引力对城市经济增长的促进作用。本文构建了反映土地收入对城市经济增长的作用机制和传导路径的结构方程模型,利用285个城市2000—2010年以及2011—2013年的差分数据进行了实证检验。结果表明:土地开发收入显著促进了城市经济增长。2000—2010年间,土地出让收入每增长1个标准单位,城区GDP将增长3.09标准单位,其中土地开发收入的直接影响为0.35标准单位,间接影响为2.74标准单位。土地开发通过改善城市基础设施和公共服务、增强对产业集聚和常住人口吸引力的间接效应远大于用于城市基础设施建设投资的直接效应,在间接效应中,吸引产业集聚的影响大于吸引常住人口的影响。不同类型城市土地开发收入对城市GDP的直接影响和间接影响的程度不同。

关键词： 血清C肽   糖化血红蛋白   糖尿病诊断  

摘要： 探究血清C肽与糖化血红蛋白联合检验对糖尿病的诊断作用。方法 选取2015年8月至2016年7月我院收治的85例糖尿病患者作为研究对象,视为观察组,并选取85例同期健康体检者,视为对照组,观察分析两组患者的空腹血糖值、糖化血红蛋白、餐后 2h 血糖值以及血清C肽值。结果 观察组的平均空腹血糖值、糖化血红蛋白、餐后 2h 血糖值以及血清C肽值等方面要明显优于对照组,P<0.05,具有统计学意义。结论 血清C肽与糖化血红蛋白联合对糖尿病患者检测后,能够对患者的身体情况了解透彻,对糖尿病患者的治疗具有非常高的参考价值,值得广泛推广。

关键词： 第三方检验机构   临床医学   服务模式  

摘要： 结合我国国情,从第三方医学检验机构的产生背景入手,对第三方检验机构的市场作用及发展前景进行分析,旨在推动第三方医学检验机构进一步发展和壮大。

关键词： 尿糖   尿微量白蛋白   联合检验   糖尿病   肾损伤   诊断价值  

摘要： 目的:探讨尿糖与尿微量白蛋白(mAlb)联合检验对糖尿病早期肾损伤的诊断价值。方法:糖尿病早期肾损伤患者40例纳入观察组,健康志愿者40例设为对照,分别测定尿糖、mAlb水平,并分析其对糖尿病早期肾损伤的诊断价值。结果:观察组尿糖(3.05±1.42)mmol/L、mAlb(37.56±5.22)mg/L较对照组高(P<0.05);尿糖及mAlb联合检验对糖尿病早期肾损伤的诊断灵敏度为94.3%,特异度为80.0%,准确度为92.5%。结论:尿糖与mAlb联合检验对糖尿病早期肾损伤具有较高诊断价值,值得临床推广应用。

关键词： 卫生理化检验   疾病预防控制   食品   饮用水  

摘要： 对当前卫生理化检验面临的严峻形势进行分析,并对卫生理化检验在保证食品安全、饮用水安全及突发公共卫生事件中的作用进行探究,指出新时期新发展背景下卫生理化检验工作的新方向,旨在为相关研究提供一定思路。