排序方式： 共有39条查询结果，搜索用时 15 毫秒
1.
2.
传媒经济学研究的历史、方法与范例 总被引：3，自引：0，他引：3
本文主要回顾了传媒经济学在西方的发展历程、研究方法以及不同时期的研究议题。传媒经济学是构建于不同的经济学理论和分析方法之上的应用性学科,它致力于研究经济和金融力量如何影响传媒体系和传媒组织。西方传媒经济学创建于20世纪50年代,至今已发展成为一个活跃的和跨学科研究领域。文章认为,西方传媒经济学的主要研究范例包括理论型、应用型和批评型范例;其研究方法可分为行业市场研究、公司研究和影响力研究。在介绍西方传媒经济学研究的同时,本文还简要回顾了传媒经济学在中国的兴起与发展。 相似文献
3.
B. G. C. Maisonneuve T. Honegger J. Cordeiro O. Lecarme T. Thiry D. Fuard K. Berton E. Picard M. Zelsmann D. Peyrade 《Biomicrofluidics》2016,10(2)
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks. 相似文献
4.
Giavana Jones Dragana Ostojic Jessica Menard Erin Picard 《The Journal of educational research》2017,110(2):171-176
Reading is typically considered a survival skill in our technology- and literacy-bound culture. Individuals who struggle with learning to read are at significantly elevated risk for a number of negative outcomes, including school failure, under- and unemployment, and special education placement. Thus, those who do not learn to read fluently will likely be a greater drain on society's resources. The authors examined the effects of a universal (school district-wide) implementation of a well-validated peer-tutoring reading intervention as a system-wide prevention measure in kindergarten through Grade 3 in a small metropolitan area in Canada. Results suggest that nearly all children demonstrated improved reading fluency over time. Yet those at highest-risk for poor outcomes, including those living in poverty and those who face learning challenges due to English as a second-language status or special education enrollment, did not make parallel gains to same-age peers in more affluent schools. Implications for educational policy are discussed. 相似文献
5.
6.
Barbara Houbre Cyril Tarquinio Isabelle Thuillier Emmanuelle Hergott 《European Journal of Psychology of Education - EJPE》2006,21(2):183-208
Violence among students at school is an ever-growing problem. Bullying can be defined as all forms of repeated physical or
mental violence performed by an individual on another person who is not capable of defending him/herself (Roland & Idsoe,
2001). The three studies conducted here reveal some of the characteristics and implications of this type of aggression. Whether
the attacker (s) or the attacked, all protagonists in a bullying episode suffer the consequences of this behavior. Study 1
showed that students who were both victims and bullies had the lowest self-concepts in all areas studied. Victims exhibited
inferior self-concepts to bullies, who in turn obtained lower scores than students not involved in bullying at all. Study
2 showed, as expected, that the group of bully/victims reported more psychosomatic problems than all other groups. In addition,
there was a positive link between behavioral problems and the onset of psychosomatic disorders. Study 3, which was mainly
exploratory, looked at the traumatic impact of bullying and the emergence of addictive behavior. Children who had vivid memories
of being the victim of an aggressive act manifested a high level of post-traumatic stress, although no link was observed between
post-traumatic stress and the type of aggression (physical, verbal, or relational). A dependency relationship was found between
post-traumatic stress and substance use. The results of these studies suggest that the many complexities of the different
protagonists of bullying should be taken into account in view of developing servicing that is geared to each individual. 相似文献
7.
Robert G. Picard 《Journal of Media Economics》2013,26(1):61-74
The author argues that the amount of circulation controlled by, and number of papers owned by, major newspaper firms does not provide adequate measures of economic concentration. The study measures the national newspaper market and thirty local markets using various concentration ratios and finds that all markets surpass the levels of concentration normally associated with monopoly. 相似文献
8.
Robert G. Picard 《Journal of Media Economics》2013,26(2):19-34
The complexities of cost allocation in predatory pricing lawsuits involving pricing of free circulation subsidiaries are examined in this article. The author discusses three methods for allocating costs to find evidence of below‐cost sales and argues that proportional cost allocation provides the most balanced treatment of the interests of plaintiffs and defendants. 相似文献
9.
10.
The present experiments were aimed at testing Karmiloff-Smith's (1992) assumption that representational flexibility in drawing behavior requires the relaxation of a sequential constraint. A total of two hundred and forty 5- to 9-year-old children produced cross-category drawings (e.g., a house with wings) in 4 conditions. The results indicated that procedural rigidity declined as representational change improved. The decline in procedural rigidity occurred before representational change attained its highest level. This decline was related to a greater ability to manage early interruptions of the procedures, not to a greater ability to modify the usual feature sequencing. It was concluded that rigidity in routine development could act as a sequential constraint on interrepresentational change. 相似文献