美国在网络主权问题上的立场变化及启示     

余建川 《情报杂志》2021,40(2):102-110

[目的/意义]在网络空间这个新颖而又无处不在的领域中,主权原则如何运作一直是国家实践和学界理论研究中的硬核问题。厘清美国在该问题上的立场变化对我国参与网络空间国际治理具有积极意义。[方法/过程]利用历史分析法、文献研究法和对比分析法对美国《情报活动中的国际法律问题评估》(1999年)、《网络行动国际法塔林手册2.0》和《在军事行动中使用网络能力的国际法框架》(2017年)进行法律考察。[结果/结论]研究表明,为应对美国在网络主权问题上的立场转变,我国应坚持领土主权原则的拘束力,平等地尊重各国网络主权,并积极参与网络空间国际规则制定的实践,推动网络空间命运共同体理念的国际法构建。  相似文献   

广西巴马盘阳河沿岸长寿资源的游憩价值评价——基于修正的区域旅行费用法     

刘亚萍  廖蓓  金建湘 《资源科学》2012,34(5):964-972

本文基于修正的区域旅行费用法对巴马盘阳河沿岸长寿资源的游憩价值进行了评价。论文的主要贡献在于：一方面,一是采用调查样本中询问获知的直接花费和旅游天数作为划分费用区间的基础,可以消除按地理区域划分游客圈所带来的平均价格偏差;二是对于长期滞留者即30天以上游客,改变计算机会成本为计算他们在当地的平均食宿费用,可消除长期滞留游客机会成本计算的偏差;三是在汇总游憩价值时,只统计专程到巴马游览或休闲的游客,可以解决由于计入多目的地游客所带来高估评估价值的问题。另一方面,依据所建立对数函数模型评价结果为：2009年巴马长寿资源的游憩价值至少是18．54亿元人民币;同时,根据消费者剩余估算模型以及旅行费用与滞留天数和年龄的相关性分析,可以推断本文中所建立的函数模型符合现阶段巴马游客构成的客观实际,并可表明巴马长寿资源的经济价值更符合于休闲疗养旅游业的发展。  相似文献   

蓬溪县赤城湖水库指示藻类的组成与水质的生物学评价   总被引：1，自引：0，他引：1  

李仁全 《四川职业技术学院学报》2007,17(2):110-112

经调查初步鉴定出蓬溪县赤城湖水库有指示藻类44种,隶属于6门、25属．其中极常出现在多污带水体的指示藻类2种,极常出现于α-中污带水体中的指示藻类15种,β-中污带极常出现的种类20种,微污带水体中极常出现的种类为7种．利用指示藻类和Margalef多样性指数分析表明,目前赤城湖水库的水质受到了一定的影响,通过严格管理和自来水厂的消毒、灭菌,从而保证居民生活的安全用水．  相似文献   

AHKC儿童青少年体力活动评估体系研究     

岳建军 《成都体育学院学报》2016,(5):33-39

全民健身关系人民群众身体健康和生活幸福,儿童青少年是全民健身工作的重点。本文通过对加拿大儿童青少年体力活动评估体系研究,为我国儿童青少年体力活动促进工作提供借鉴。研究认为：加拿大儿童青少年体力活动评估体系注重多学科研究成果的实践转化,评估指标围绕儿童青少年体力活动生态系统进行构建,评估标准采用标准参照与常模参照相结合的方式,以百分数的形式将评估结果分成若干差别明显的等级水平,评估主体采用第三方评估团队,借用逻辑模型理念进行实施。在此基础上,提出我国构建儿童青少年体力活动评估体系的理由和路径。  相似文献   

体育市场中的灰色综合评估分析——以李宁公司销售网络评估为例     

刘嘉津  阮美飞 《体育函授通讯》2008,24(1):39-40

依据我国体育市场的特殊性,借助对李宁公司主要销售网络城市的评估分析,介绍了灰色综合方法在体育市场分析中的具体应用,为当前变化发展中的体育市场分析评估工作提供有针对性的实用量化方法。  相似文献   

Swedish PE teachers’ understandings of legitimate movement in a criterion-referenced grading system     

Lena Svennberg 《Physical Education & Sport Pedagogy》2017,22(3):257-269

Background: Physical Education (PE) has been associated with a multi-activity model in which movement is related to sport discourses and sport techniques. However, as in many international contexts, the Swedish national PE syllabus calls for a wider and more inclusive concept of movement. Complex movement adapted to different settings is valued, and in the national grading criteria qualitative measures of movement are used. This research seeks to examine how the wider concept of movement is interpreted and graded. Drawing on Bernstein’s concept of the pedagogic device, the paper explores teachers’ roles as active mediators in the transformation of national grading criteria for movement and the kinds of movement that are valued in teachers’ grading practices. Purpose: The purpose of this study is to investigate what PE teachers consider legitimate movement in a criterion-referenced grading system and the factors that influence their grading practice. The Repertory Grid (RG) technique was employed in order to access their tacit knowledge. Methodology: Seven Swedish PE teachers were interviewed, all of whom teach and grade years seven to nine in different compulsory schools. Using the RG technique, the teachers were asked to reflect on the aspects they considered important for achieving a high grade. The national grading criteria for years seven to nine were then presented one at a time and the teachers were asked to describe how they assessed and graded each requirement. The teachers were also asked whether any specific factors had influenced their grading. In the content analysis, the second part of the interview was attended to first and the results were interpreted in light of Bernsteins’ concept of the pedagogic device. Findings: Sport techniques and competitive sports influenced the teachers’ interpretations of what constitutes complex movement. The aspect of fitness also appeared to be valued by the teachers in that it facilitates the valued movement. In some cases the difficulty of describing movement qualities in words could reduce the concept of movement to something measurable and quantifiable. The teachers’ concerns about students’ unequal opportunities to develop and demonstrate their skills also influenced the teachers’ interpretation of complex movement. Conclusions: In the transformation of national grading criteria to grading practice, the pedagogic actions taken inform and limit the way in which legitimate movement in PE is conceptualised. Adopting a concept of movement that is wider than competitive sports allows the structures of inequality to be addressed and enables the movements performed by students with other moving experiences than competitive sports to be valued. The tension between the demands of transparency in a high stakes grading system and the inability to articulate the quality of complex movements is problematic. There is a need to verbalise teachers’ conceptions about physical education knowledge to be able to discuss and develop the concept of movement. In this process, the RG technique is a potentially useful tool. Having the language to discuss movement qualities also enables us to strengthen the interrelation between curriculum, pedagogy and assessment.  相似文献   

Combined individual scrummaging kinetics and muscular power predict competitive team scrum success     

Andrew Green  Chloe Dafkin  Samantha Kerr  Warrick McKinon 《European Journal of Sport Science》2017,17(8):994-1003

Scrummaging is a major component of Rugby Union gameplay. Successful scrummaging is dependent on the coordination of the forward players and the strength of the eight individuals. The study aim was to determine whether individual scrummaging kinetics and other candidate factors associated with scrummaging performance discriminate team scrum performances. Sixteen club-level forwards (stature: 1.80?±?0.1?m; mass: 99.0?±?18.2?kg) were initially divided into two scrummaging packs. A total of 10 various scrum permutations were tested, where players were randomly swapped between the two packs. Winning scrums were determined by two observers on opposite sides of the scrum. Fatigue (100?mm visual analogue scale (VAS)) and scrummaging effort (6–20 rating of perceived exertion (RPE)) were assessed following each scrum contest. Individual scrummaging kinetics were acquired through an instrumented scrum ergometer and muscular power indicated through vertical jump heights. Student’s t-tests were used to differentiate between winning and losing scrum packs. VAS and RPE were assessed using repeated measures ANOVAs. Winning scrum packs had significantly larger combined force magnitudes (p?<?.002), regardless of the player contribution calculations. Additionally, winning packs had less individual movement (p?=?.033) and higher combined vertical jump heights (p?<?.001) but were not significantly heavier (p?=?.759) than losing scrum packs. While perceived VAS and RPE values progressively increased (p?<?.001), no differences in the individual scrum magnitudes were observed between the 1st and 10th scrum (p?=?.418). The results indicated that the combination of individual forces, variation in movement and factors related to scrummaging performance, such as vertical jump height, were associated with team scrummaging success.  相似文献   

Development and Validation of a Multimedia-based Assessment of Scientific Inquiry Abilities     

Che-Yu Kuo  Tsung-Hau Jen  Ying-Shao Hsu 《International Journal of Science Education》2013,35(14):2326-2357

The potential of computer-based assessments for capturing complex learning outcomes has been discussed; however, relatively little is understood about how to leverage such potential for summative and accountability purposes. The aim of this study is to develop and validate a multimedia-based assessment of scientific inquiry abilities (MASIA) to cover a more comprehensive construct of inquiry abilities and target secondary school students in different grades while this potential is leveraged. We implemented five steps derived from the construct modeling approach to design MASIA. During the implementation, multiple sources of evidence were collected in the steps of pilot testing and Rasch modeling to support the validity of MASIA. Particularly, through the participation of 1,066 8th and 11th graders, MASIA showed satisfactory psychometric properties to discriminate students with different levels of inquiry abilities in 101 items in 29 tasks when Rasch models were applied. Additionally, the Wright map indicated that MASIA offered accurate information about students’ inquiry abilities because of the comparability of the distributions of student abilities and item difficulties. The analysis results also suggested that MASIA offered precise measures of inquiry abilities when the components (questioning, experimenting, analyzing, and explaining) were regarded as a coherent construct. Finally, the increased mean difficulty thresholds of item responses along with three performance levels across all sub-abilities supported the alignment between our scoring rubrics and our inquiry framework. Together with other sources of validity in the pilot testing, the results offered evidence to support the validity of MASIA.  相似文献   

Does STES‐Oriented Science Education Promote 10th‐Grade Students’ Decision‐Making Capability?     

Tami Levy Nahum  David Ben‐Chaim  Ibtesam Azaiza  Orit Herskovitz 《International Journal of Science Education》2013,35(10):1315-1336

Today’s society is continuously coping with sustainability‐related complex issues in the Science‐Technology‐Environment‐Society (STES) interfaces. In those contexts, the need and relevance of the development of students’ higher‐order cognitive skills (HOCS) such as question‐asking, critical‐thinking, problem‐solving and decision‐making capabilities within science teaching have been argued by several science educators for decades. Three main objectives guided this study: (1) to establish “base lines” for HOCS capabilities of 10th grade students (n = 264) in the Israeli educational system; (2) to delineate within this population, two different groups with respect to their decision‐making capability, science‐oriented (n = 142) and non‐science (n = 122) students, Groups A and B, respectively; and (3) to assess the pre‐post development/change of students’ decision‐making capabilities via STES‐oriented HOCS‐promoting curricular modules entitled Science, Technology and Environment in Modern Society (STEMS). A specially developed and validated decision‐making questionnaire was used for obtaining a research‐based response to the guiding research questions. Our findings suggest that a long‐term persistent application of purposed decision‐making, promoting teaching strategies, is needed in order to succeed in affecting, positively, high‐school students’ decision‐making ability. The need for science teachers’ involvement in the development of their students’ HOCS capabilities is thus apparent.  相似文献   

Measured lives: the rise of assessment as the engine of change in English schools     

Mary James 《Curriculum Journal》2013,24(3):343-364

The year 2000 marks the end of compulsory education for the first cohort of students to experience the National Curriculum throughout their school careers. This article describes their experience of assessment and compares it with the testing regime that those children who start school in 2000 are likely to experience. Changes in policy from the early Task Group on Assessment and Testing proposals are analysed, especially the increasing priority given to the use of assessment for monitoring and evaluating the performance of teachers, schools and local education authorities. This shift is interpreted in terms of underlying assumptions about effective strategies for change. While Conservative and Labour governments have pursued somewhat different goals, they have used a similar change strategy. This explains why the general thrust of policy has continued in a broadly similar direction - towards ever more testing in schools and the use of results as performance indicators. It is argued, however, that this strategy cannot be pursued indefinitely. After a point, further improvements will only be made if teachers are helped to work ‘smarter’, not just harder. Policy-makers need, therefore, to look again at the contribution that formative assessment - or assessment for learning as part of pedagogy - can make to lifelong learning, in a more coherent, balanced and ‘educational’ system.  相似文献