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

Yanfang Wu 《Journalism Practice》2019,13(5):537-557

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.  相似文献   

美国公共部门信息再利用的实践经验及对我国的启示——基于新公共管理视角的分析     

由兴波  宋艳 《图书馆学研究》2011,(10):73-76

美国非常重视公共部门信息的再利用。文章在对目前国内相关的研究文献进行综述的基础上,总结了美国推动公共部门信息再利用的主要经验,主要包括：制定严密的法律、实施开放的商业化运作、利用先进的信息技术以及大力倡导开放存取,以便推进公共部门信息再利用。文章以新公共管理为视角,揭示美国公共部门信息再利用对我国的有益启示。  相似文献   

消费者知识对我国信用卡创新扩散的影响研究   总被引：1，自引：0，他引：1  

付晓蓉  赵冬阳  李永强  韩佩浚 《中国软科学》2011,(2)

近年来,我国信用卡的发卡量增长迅速。但据资料显示,我国目前信用卡的使用率相当低。文章从消费者知识的角度,结合产品创新扩散属性,对不断创新的信用卡进行研究,讨论消费者对信用卡的认识程度与熟悉程度,即消费者知识对信用卡的创新属性感知与消费者创新信用卡的使用意愿间关系的影响,更深入地剖析消费者信用卡使用的根本原因,为提升我国信用卡的使用率,提高消费者信用卡使用的效率提供一定的理论思路,并期望能对现有消费者创新行为研究的理论框架有所贡献。  相似文献   

生态创新对长三角地区生态经济的影响     

杜立民  王如琦  肖赵华 《资源科学》2021,43(10):1961-1975

面对长三角地区区域一体化的经济建设及绿色发展新需求,生态创新如何影响该区域生态经济发展水平,学术界尚未形成共识。本文基于2010—2018年长三角地区41个地级及以上城市面板数据,首先,研究了生态创新对生态经济发展的线性影响;然后,运用中介效应模型考察了生态创新对长三角地区生态经济发展的影响途径;最后,使用面板门槛模型,探索了异质性收入水平下,生态创新与生态经济之间的非线性关系。研究结果表明：①生态创新促进了长三角地区生态经济的发展;生态创新通过提升绿色技术扩散,而非绿色技术进步来推动长三角地区生态经济发展;②生态创新在不同收入水平下存在双门槛效应,即随着收入水平的上升,生态创新对生态经济发展的影响显著为正,而且其影响程度呈现出先递增后递减的非线性规律。本文建议应从提升生态技术创新能力、防止“一刀切”政策以及加强区域合作等方面来促进长三角地区生态创新一体化,从而助力该区域经济高质量发展。  相似文献   

The extended Unified Theory of Acceptance and Use of Technology (UTAUT2): A systematic literature review and theory evaluation     

《International Journal of Information Management》2021

The extended unified theory of acceptance and use of technology (UTAUT2) is less than ten years old and has already garnered more than 6000 citations with extensive usage in information systems and beyond. This research employed cited reference search to systematically review studies that cited UTAUT2 originating article. Based on UTAUT2 usage, the downloaded articles were classified into four categories such as: 1) General citation, 2) UTAUT2 application, 3) UTAUT2 integration, and 4) UTAUT2 extensions. Weber's (2012) theory evaluation framework revealed UTAUT2 as a robust theory on most dimensions except for parsimony arising from the complex model. UTAUT2 extensions emerged as popular UTAUT2 utilization category as researchers extended the model with context specific variables. Finally, UTAUT2 extensions were mapped to Johns' (2006) context dimensions to identify various limitations of the existing technology adoption research and to provide multi-level framework for future researchers with libraries of context dimensions.  相似文献   

拉力视角的苏浙沪皖产业转移与承接分析     

刘宗普  江三良 《合肥教育学院学报》2014,(2):70-75,87

区域产业转移有利于转出地的产业结构升级,转入地经济的快速发展和产业结构调整。经过改革开放以来30多年的发展,苏浙沪地区出现大量产业对外转移现象,这对如安徽一样的中部地区是一个难得的发展机会。基于企业、产业、空间三个角度,根据苏浙沪和安徽经济发展现状和实际情况,对比分析了安徽在此次承接苏浙沪产业转移过程中所具有的拉力因素,阐明安徽将成为苏浙沪产业转移的首选地。  相似文献   

P-M与TV模型在加性高斯白噪声去噪中的比较研究     

杨巧  李五强  韩国栋 《渭南师范学院学报》2014,(15):5-10

噪声是图像获取、传输和储存过程中不可避免的现象。去噪作为图像处理的首要步骤与基本问题是后续的高层次图像处理的基础。以加性高斯白噪声为例,综述了P-M扩散方程及TV模型的原理,并从视觉与定量指标两个方面比较了去噪效果。最后,在热扩散方程模型预处理条件下比较了两种模型的去噪效果。  相似文献   

一类双重退化的奇异扩散方程     

詹华税  ;汤林冰 《鹭江职业大学学报》2014,(5):88-92

根据YIN和WANG的方法,结合Fichera-Oleinik理论,研究奇异扩散方程：φ（ u）/t =div（ραu p-2u）,（x,t）∈QT =Ωx（0,T）,其中Ω是RN 中的有界区域,边界Ω充分光滑,ρ（x）=dist（x,Ω）, p 〉1,α〉0,φ满足：φ∈C2,且存在δ〉0使得φ′（s）〉δ〉0.证明了α≥p -1时,不需要任何边值条件,方程最多有一个满足初值条件的解;而0〈α〈 p -1时,方程存在唯一满足初边值条件弱解.  相似文献   

基于信息扩散理论的洞庭湖区农业旱灾风险评估     

何晴亲  刘培亮  杨霞  詹婷 《衡阳师范学院学报》2014,35(6):105-108

以洞庭湖区2000~2009年的农业旱灾灾情统计数据为样本,运用基于信息扩散理论的模糊数学模型建立其在一定的论域上的模糊关系,然后据此得出旱灾指标的概率分布,继而得到旱灾指标的超越概率,最后分析洞庭湖区干旱的历史重现概率。结果表明:洞庭湖区几乎年年发生干旱;每5.2年就要发生1次受灾面积超过50%的中度干旱;约每20年就发生1次80%的严重干旱。  相似文献   

Combining fiber dissection,plastination, and tractography for neuroanatomical education: Revealing the cerebellar nuclei and their white matter connections          下载免费PDF全文

Hisse Arnts  Michiel Kleinnijenhuis  Jan G.M. Kooloos  Annelieke N. Schepens‐Franke  Anne‐Marie van Cappellen van Walsum 《Anatomical sciences education》2014,7(1):47-55

In recent years, there has been a growing interest in white matter anatomy of the human brain. With advances in brain imaging techniques, the significance of white matter integrity for brain function has been demonstrated in various neurological and psychiatric disorders. As the demand for interpretation of clinical and imaging data on white matter increases, the needs for white matter anatomy education are changing. Because cross‐sectional images and formalin‐fixed brain specimens are often insufficient in visualizing the complexity of three‐dimensional (3D) white matter anatomy, obtaining a comprehensible conception of fiber tract morphology can be difficult. Fiber dissection is a technique that allows isolation of whole fiber pathways, revealing 3D structural and functional relationships of white matter in the human brain. In this study, we describe the use of fiber dissection in combination with plastination to obtain durable and easy to use 3D white matter specimens that do not require special care or conditions. The specimens can be used as a tool in teaching white matter anatomy and structural connectivity. We included four human brains and show a series of white matter specimens of both cerebrum and cerebellum focusing on the cerebellar nuclei and associated white matter tracts, as these are especially difficult to visualize in two‐dimensional specimens and demonstrate preservation of detailed human anatomy. Finally, we describe how the integration of white matter specimens with radiological information of new brain imaging techniques such as diffusion tensor imaging tractography can be used in teaching modern neuroanatomy with emphasis on structural connectivity. Anat Sci Educ. 7: 47–55. © 2013 American Association of Anatomists.  相似文献