学校文化认同、组织文化氛围与教师满意度对学校效能的影响效应:基于结构方程模型(SEM)的实证研究

基于结构方程模型的研究在回顾相关文献的基础上建立了学校文化认同、组织文化氛围与教师满意度对学校效能影响效应的假设理论模型,运用结构方程模型对假设模型进行了实证分析,结果发现:第一,学校文化认同、人本导向的组织文化氛围对学校效能具有显著影响效应;第二,学校文化认同、人本导向的组织文化氛围对教师的内在满意度具有显著影响效应;第三,教师满意度在学校文化认同、人本导向的组织文化氛围到学校效能之间未发现起中介作用.这一研究从实证的角度验证了学校文化对于学校效能的影响效应,对提高学校的文化领导力具有较好的参考价值.     

Multilevel Mediation With Small Samples: A Cautionary Note on the Multilevel Structural Equation Modeling Framework

Multilevel structural equation modeling (ML-SEM) for multilevel mediation is noted for its flexibility over a system of multilevel models (MLMs). Sample size requirements are an overlooked limitation of ML-SEM (100 clusters is recommended). We find that 89% of ML-SEM studies have fewer than 100 clusters and the median number is 44. Furthermore, 75% of ML-SEM studies implement 2–1–1 or 1–1–1 models, which can be equivalently fit with MLMs. MLMs theoretically have lower sample size requirements, although studies have yet to assess small sample performance for multilevel mediation. We conduct a simulation to address this pervasive problem. We find that MLMs have more desirable small sample performance and can be trustworthy with 10 clusters. Importantly, many studies lack the sample size and model complexity to necessitate ML-SEM. Although ML-SEM is undeniably more flexible and uniquely positioned for difficult problems, small samples often can be more effectively and simply addressed with MLMs.     

Biodeterioration of Incralac used for the protection of bronze monuments

Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments.     

基于SEM的高校图书馆读者忠诚研究——以江苏省高校为例

在回顾图书馆读者忠诚文献的基础上,通过问卷调查的数据,分析影响图书馆读者忠诚的因素,并利用Lisrel8.70软件构建图书馆读者忠诚结构模型,指出提升图书馆读者忠诚的关注点。     

基于结构方程模型的信息系统开发风险评价研究

信息系统开发过程中的风险可能对开发效果造成不良影响,企业管理者迫切需要系统的评价方法去定量测算各种风险对信息系统开发效果的影响程度。本文将结构方程模型引入到信息系统开发风险评价过程中来,从开发风险的来源和构成出发,构建信息系统开发风险评价结构方程模型,并将该模型应用于实例的求解。应用结果表明,该模型能够区分风险造成影响的显著程度,从而为管理者提供对风险进行事前控制的有力依据。     

鸭绿江茴鱼鳃的扫描电镜观察

用扫描电镜对鸭绿江茴鱼（Thymallus arcticus yaluensis）鳃的表面结构特征进行了详细的观察.结果表明：鳃耙、鳃弓、鳃丝及鳃小片细胞都有不同形状的隆嵴和刻纹等结构;鳃耙上有两种刺状骨质突起;鳃弓上有大小不同的空洞;鳃小片的上皮细胞表面凸凹不平;鳃丝上皮细胞隆起和刻纹较为发达,这些形态结构是与它的生理功能及生活习性密切相关的.     

互联网金融理财产品使用影响因素研究

依据TAM和TPB模型,按照金融的流动性、收益性和安全性三原则,验证用户使用互联网金融理财产品的关键影响因素。以余额宝为例,收集224个量表作为样本,使用PLS方法,验证互联网金融理财产品结构化方程模型。研究发现,自我效能、感知易用、感知有用在用户使用互联网金融理财产品的影响因素中起着关键作用。自我效能对感知易用、感知有用和使用行为的影响显著。社会影响对用户感知风险和行为意向影响显著,但是影响低于自我效能。     

学术博客用户知识共享意愿的影响因素研究--以科学网博客为例

学术博客用户知识共享意愿受到多种因素影响,本文以科学网博客为例,结合基于个体与环境交互的自我概念理论和基于人际交换关系的传统动机理论构建研究模型。通过调查问卷搜集数据和运用结构方程模型进行实证研究,结果表明内部自我概念、外部自我概念、社会关系互惠、形象、自我价值感知和乐于助人对学术博客用户知识共享意愿均具有显著影响。     

中小企业集群的横向合作与技术创新激励研究

中小企业集群内的知识和技术外溢会带来集群内模仿行为,挫伤创新企业技术创新的积极性。通过博弈模型研究发现,若将企业间横向合作与技术创新活动策略性地联结起来,就可能形成一种制度安排,能够有效解决企业创新激励不足问题。以义乌小商品制造集群作为案例,验证上述理论模型。     

How Age Affects Journalists’ Adoption of Social Media as an Innovation

American newsrooms are adopting social media as an innovation for greater engagement. However, several organizational and individual factors may affect the extent to which news outlets adopt social media innovations. In particular, there is assumed to be a divide among different age groups of journalists in embracing social media. Utilizing a structural equation modeling (SEM) analysis, the study seeks to understand how social media culture in newsrooms affects journalists’ strategies of taking social media as an innovation, and how journalists of different age groups differ in the SEM model fit. The analyses indicated Twitter engagement mediates social media culture and journalists’ attitude toward social media. However, that was not the case with Facebook. Additionally, while younger journalists favored Twitter, older journalists embraced Facebook and middle-aged journalists adopted both Facebook and Twitter. The analyses showed the more that middle-aged journalists interacted on Twitter, the more they tended to have a positive attitude toward social media. However, the more that younger and older journalists engaged on Twitter, the more they tended to have a negative attitude toward social media. Journalists from all three age groups tended to hold a negative attitude toward social media if they engaged more on Facebook.