对我国掷标枪后备人才最后用力投掷技术的探讨

对中国优秀青少年标枪运动员的技术进行分析,分析我国的青少年标枪运动员的掷标枪技术不十分理想。主要表现在:最后用力时的右脚着地发力不积极;左膝关节弯曲过大,并在出手时没有充分伸展;投掷手臂没有明显的延迟动作。     

掷标枪技术教法研究

为探索现代标枪技术新教法的可行性，进行了该教学实验。对两个班72名男生进行配对分组，并采用新旧两种教法教学。结果表明，在技评、达标与成绩提高的幅度等方面，实验组均优于对照组，并存在显著性差异。因此，新教法具有可行性。     

论剪报在网络环境下的可持续发展

章阐述了剪报作为快捷灵活、内涵丰富的信息产品，在公共图书馆与高校图书馆的服务形式上的异同点及其所发挥的特有价值、作用及意义。指出了阻碍剪报发展的主要问题．并提出了剪报在网络环境下可持续发展的几个条件。     

第14届世界男篮锦标赛与亚运会中国男篮外围队员进攻与防守技、战术研究

尽管王治郅缺阵，但拥有NBA状元秀姚明及掘金队巴特尔的中国男篮竟然在第14届世界男篮锦标赛上1胜7负。1个多月后又在亚运会男篮决赛中输给了韩国队。具备世界级身体条件的中国队的表现与国内外期望值形成强烈反差。该文通过对中国男篮在世锦赛上的7场比赛及亚运会决赛录像的统计分析，发现了我外围队员在个人进攻与防守能力、各种进攻方法比率、参与全队防守战术的质量、抢篮板球等方面与国外强队存在较大差距。提出更新理念，改革竞赛与训练体制，引进外籍教练、球员和裁判员，选派教练员赴NBA进修，增加与世界强队的比赛，借鉴NBA训练方法等建议。     

提高投掷运动员专项投掷能力的强力方法

通过文献综述和理论分析,对提高投掷运动员专项投掷能力的肌肉的强力训练法和肌肉训练以外的内源性强力法进行综述,并分析各种强力方法对提高投掷运动员专项投掷能力的作用效果,为广大投掷教练员和运动员的训练提供参考.     

Press Credentials and Hybrid Boundary Zones: The Case of WorldNetDaily and the Standing Committee of Correspondents

ABSTRACT

Press credentialing practices are a vital, yet understudied site of scholarly research on journalistic norms and practices. Press credentialing not only structures internal professional hierarchies, but they also signify the boundaries of the journalistic field itself. This paper explores the legal and theoretical implications of press credentialing to cover the United States Congress, drawing on the concepts of boundary work and journalistic authority to demonstrate the material impact of the space between fields on professional legitimation in journalism. Using WorldNetDaily (WND) as a case study, I argue that the Standing Committee of Correspondents (SCC) occupies a hybrid boundary zone between the journalistic and political fields, generating a unique tension in First Amendment jurisprudence that places journalists in a paradoxical role as both the professional embodiments of free speech and its constitutional steward. The resulting jurisdictional conflict between the SCC and WND extends the relational model of journalistic authority by articulating how journalist-state relations can fundamentally augment the process of legitimation at its fuzzy boundaries. The relevance and implications for press credentialing practices in the digital age are discussed.     

How to respond to journalists’ questions? A new perspective on Chinese premiers’ aggressiveness at press conferences (1993–2015)

This study extends the framework describing journalists’ aggressiveness at politicians’ press conference and develops five dimensions to measure politicians’ aggressiveness in response to journalists’ questions (initiative, directness, assertiveness, adversarialness, and accountability). Using the records from Chinese premiers’ press conferences (1993–2015), this research investigates five factors which might affect premiers’ aggressiveness: the administrative life cycle, economic conditions, journalists’ country of origin, the topic of questions, and number of questions. The results show that premiers exhibit less assertiveness during honeymoon periods and more assertiveness in other years. Premiers are more adversarial amid good economic growth but less adversarial during poor economic growth. They are more assertive and adversarial in response to questions related to politics and the military and less so in response to questions related to other areas. Premiers display more initiative and accountability toward journalists who ask more questions and less toward those who ask fewer questions. Premiers are more assertive and adversarial toward journalists from developed countries but less so toward those from developing countries. Over the past 23 years, premiers’ initiative, directness, and adversarialness have decreased while their accountability has gradually increased. The theoretical contributions of this research are discussed.     

大学出版社学术期刊集群化运营模式研究——以清华大学出版社期刊中心为例

针对出版单位的学术期刊集群模式发展特点,根据清华大学出版社的期刊集群化建设实践,总结出学术期刊集群建设具有的普遍优势,包括办刊资源共享、人员共用、集中管理、统一制度建设、统一宣传发布平台建设等,分析大学出版社开展学术期刊集群化建设的特殊优势,包括兼具学科优势和管理优势、书刊互动、“产学研”一体化等.提出了清华大学出版社学术期刊集群的未来发展建议.     

The influence of heterogeneous exposure and pre-deliberation queries on pretrial publicity effects

Prior research on pretrial publicity has produced mixed results and a roughly equal number of studies show an effect, show no effect, or show mixed results. We explored the effects of (a) homogenous vs. heterogeneous exposure (whether deliberating jurors were all exposed to the same publicity or not) and (b) pre-deliberation queries as potential contributors to mixed results. We found an effect for positive but not negative publicity on conviction rates but not evidence ratings. Exposure heterogeneity appears to explain these differences and pre-deliberation queries did appear to play some role in the obtained outcomes. Overall these findings do not replicate a robust publicity effect and future research should consider how homogeneous exposure and pre-deliberation opinion queries influence results.     

Neuromuscular and technical abilities related to age in water-polo players

Testing is one of the important tasks in any multi-step sport programme. In most ball games, coaches assess motor, physical and technical skills on a regular basis in early stages of talent identification in order to further athletes’ development. The purpose of the study was to investigate anthropometric variables and vertical jump heights as a free throw effectiveness predictor in water-polo players of different age groups. Two hundred and thirty-six young (10–18 years) male water-polo players partitioned into three age groups underwent anthropometric variables’ measures and squat- and countermovement-jump tests, and performed water-polo free throws. Anthropometric variables, vertical jump heights and throw speed – as a proxy for free throw effectiveness – resulted different over age groups. Particularly, throw speed changed from 9.28 to 13.70 m · s^?1 (+48%) from younger to older players. A multiple-regression model indicated that body height, squat-jump height and throw time together explain 52% of variance of throw speed. In conclusion, tall height, high lower limb power and throwing quickness appeared to be relevant determinants for effective free throws. Such indications can help coaches during talent identification and development processes, even by means of novel training strategies. Further research is needed over different maturity statuses.