职业网球选手如何应用侧旋发球及特点

研究目的：随着网球技术高度发展,要求运动员的各项技术更加全面,就发球而言,目前世界高水平男子单打选手在发球落点、旋转和角度准确性的控制等方面较为突出,而在发球决胜局中,特别是在制胜分上在第一次发失误的情况下,如何在第二发中限制对手并迫使对手进入自己的预设的赢球模式显得尤为重要。研究结果和结论：通过分析发现职业网球选手在处理关键分上发球时偏向采用侧旋,以角度、旋转制胜而不是在速度上寻求制胜。     

Ethical consumption applications as failed market innovations: exploring consumer (non) acceptance of ‘quasi’ market devices

ABSTRACT

In this paper, I conceptualise ethical consumption applications (ECAs) as market innovations inflected in processes of configuring market actors and market (re)framings. The introduction of ECAs through the work of civil society is not only about changing frames of market exchange, but also work in the register of making ‘good consumers’ and consumers as ‘agents of change’ and moralising markets. Thus, a more accurate concept for these devices is suggested: ‘quasi’ market devices. The main aim of this paper is to analyse how consumers attached to and resisted use of ECAs designed to assist in product choices and shape responsible everyday practices. Based on qualitative fieldwork in Sweden, the article applies a methodology grounded in Science and Technology-inspired market studies in combination with Consumer Culture Theory’s (CCT) interest in identity work and sense-making associated with technology consumption. Although available at the time of the empirical data collection period of the study, all three apps were off the market during the analytic work of this paper; a major argument for focusing on barriers to acceptance of the apps and trying to conceptualise how such non-acceptance can be understood.     

Learning from the Learners: Preparing Future Teachers to Leverage the Benefits of Laptop Computers

Technology is changing the teaching and learning landscape. Teacher preparation programs must produce teachers who have new skills and strategies to leverage the benefits of laptop computers in their classrooms. This study used a phenomenological strategy to explain first-year college students' perceptions of the effects of a 1:1 laptop experience on their readiness for college and the uses of technology for instructional purposes by high school teachers. Participants in the study had experienced a 1:1 laptop initiative for two or more years while in high school. The study included interviews with 15 participants from two different countries and five different high schools. Recommendations from student voices in this study call for teacher preparedness beyond the levels of traditional teacher preparation curriculum. Teacher preparation programs and ongoing professional development need to embed curriculum with practical applications of technology integration for teachers so that they are truly classroom ready to leverage the computers that students come to class expecting to use.     

绿色供应商整合对外部知识采用与绿色创新的影响——兼容性的调节效应

基于中国237家制造企业的样本数据,通过层级回归的统计方法探讨绿色供应商整合、外部知识采用与绿色创新的关系以及兼容性的调节效应。实证研究结果表明:绿色供应商整合有助于外部知识的采用,进而有利于企业的绿色产品创新和绿色工艺创新;外部知识采用在绿色供应商整合与绿色产品创新和绿色工艺创新的关系中均具有部分中介效应;此外,知识兼容性在绿色供应商整合与外部知识采用的关系中具有负向调节效应,战略兼容性在绿色供应商整合与外部知识采用的关系中具有正向调节效应。     

论对鉴定结论的采信

文章介绍了英美法系和大陆法系各主要国家的专家证人制度和鉴定人制度,并在总结两大法系国家对鉴定结论的采信规则共性的基础上,结合我国在鉴定结论采信机制中存在的问题,提出了在我国制定一整套关于鉴定结论可采性要素的标准及建立强制鉴定人出庭作证制度的主张,以完善我国的鉴定结论采信机制。     

应用型本科教育质量观的选择与实现

“需求主体参与原则”、“阶段论”和“要素论”对于应用型本科教育质量观的选择与实现有着十分现实的指导意义。教育价值观、人才观和人才培养目标定位都制约着质量观的选择,统一性与多样性的有机结合是质量观选择的基本原则。质量观实现过程是一个复杂的系统工程,并不是简单加减几个环节（课程）与课时就能完成。需求主体参与是实现的关键。     

组织信息技术采纳的影响因素研究述评

对现有信息技术采纳的文献进行研究后认为,随着信息技术的普及和应用层次的提升,对基于网络的信息技术的采纳研究正在成为研究热点。在这类技术的采纳研究中,应该把关注的重点放在组织和环境因素的考察上。此外,在组织复杂信息技术采纳研究中,还应该关注各种因素之间的交互作用。     

Modeling the adoption rates of manufacturing technology innovations by small US manufacturers: a longitudinal investigation

This study provides conclusive evidence to support the view that small plants are slower than larger plants to adopt manufacturing innovations. This empirical study based on over 1000 US manufacturing plants engaged in producing discrete products, studies the adoption of manufacturing technologies in small plants relative to large plants between 1993 and 1997.Under the assumption that small manufacturers are disadvantaged, several federal and state programs have been created to assist small manufacturers in acquiring and adopting manufacturing innovations. Through quantification of technology adoption in small manufacturing firms, this study’s findings reveal which manufacturing innovations are in greater need of governmental assistance programs. While small plants are making progress over time in catching up with larger plants in computerized technology use, they are not making similar progress in adopting manufacturing technology innovations in soft technologies. Several propositions for future research and recommendations for public policy are offered.     

物理高考改革研究

本文对我国现行高考制度作了初步分析与评价,提出了物理高考改革的指导思想与目标、几种可选模式、试题内容改革的方向等问题。     

Agricultural innovation systems and farm technology adoption: findings from a study of the Ghanaian plantain sector

Purpose: We assess farm technology adoption in an integrated analysis of social networks and innovation in plantain production in Ghana. The paper explores the strength of social networks in the agricultural innovation systems (AISs) and the effect of AISs on adoption of improved farm technology.

Methodology/Approach: The paper uses social network analysis (SNA) tools to identify, map and analyze the AISs and the two-stage Heckman selection model. Combining qualitative and quantitative methods allows testing the differential effects of social networks on technology adoption.

Findings: We find weak innovation systems in the study area. Farmers are central in the social networks but have little to no influence in the innovation system perspective. Social network capital plays a critical role in improving adoption of improved farm technology.

Practical implication: Focal farmers are important actors disseminating farm technology. They should be supported by policies to interact more effectively with research and extension agents. Strengthening the role of social networking in the innovation system will enhance adoption of improved farm technology.

Theoretical implications: The inclusion of SNA indicators in the adoption model is a novel approach for quantifying the effect of the innovation system and contributes to understanding the roles of different actors. Further validation of the SNA indicators is needed for a comprehensive analysis of the innovation system.

Originality/value: The innovation system approach is useful for researchers and policy-makers by encouraging them to consider new innovation actors and relationships in technology development and dissemination. Combining quantitative and qualitative methods can help to identify starting points for policies to promote innovations among farmers.