Kinematics of cycling in relation to anterior knee pain and patellar tendinitis

The coronal and sagittal plane leg movements of 24 experienced male cyclists were assessed using video analysis while cycling on a Kingcycle windload simulator. The cyclists were grouped into those with a history of injury and an asymptomatic group on the basis of self-reported injury status. The ages, cycling experience, competition distances and competition speeds of the two groups were compared using Student's t-test. No significant differences (P?<0.05) were found for any of these variables. The maximum and minimum shank adduction, shank adduction velocities, knee flexion and ankle dorsiflexion values were also compared using Student's t-test. Significant differences were found at the point of maximum adduction (1.9°; P?=?0.019) and minimum dorsiflexion (4.9°; P?=?0.014). These differences indicated more dorsiflexion and greater abduction on the part of the symptomatic cyclists, supporting previous research that found that cyclists with a history of injury differ from those without a history of injury in the coronal plane leg movement patterns they adopt. Also, the most extreme medial position of the knee relative to the ankle occurred during knee extension. This supports the potential injury mechanism proposed by Francis (1986), which had previously only been examined using coronal plane kinematics.     

基于MPEG-4的视频点播系统(VOD)的设计

新一代的音视频压缩标准MPEG-4不断走向成熟,成为视频应用的不可或缺的一个基础标准,具有的高压缩率、强交互能力和灵活分级能力,使之在网络媒体特别是视频点播中拥有广阔的应用前景。本文针对视频点播系统的应用,提出了MPEG-4视频点播系统的结构,实现了MPEG-4视频点播服务器的构建。     

谈网络视频流媒体技术

多媒体信息在网上的传输越来越重要,流式技术以其边下载边播放的特性深受教育、娱乐等行业的喜爱,本文主要描述流媒体系统及主要的流式技术,提出了流式技术的主要解决方案.     

Internet Fantasy Violence: A Test of Aggression in an Online Game

Research on violent video games suggests that play leads to aggressive behavior. A longitudinal study of an online violent video game with a control group tested for changes in aggressive cognitions and behaviors. The findings did not support the assertion that a violent game will cause substantial increases in real-world aggression. The findings are presented and discussed, along with their implications for research and policy.     

中小城市公交视频的发展研究

经过多年的发展,公交视频已然成为城市生活的一部分。在公交车的封闭性空间里,公交视频的强迫传播受到了广告主的认可和青睐。然而,当大城市公交视频转身为公交电视的时候,中小城市的公交视频仍然在固步自封,徘徊不前,在他们那里赢利与服务仿佛是＂鱼和熊掌＂不可兼得。     

高职影视鉴赏选修课程学生创新能力培养研究与实践

高职影视鉴赏选修课程为学生想象力、创造力、艺术感悟力、综合分析与表达能力的发展提供了实践平台。力求在明确学生创新能力和创新能力培养原则的基础上,探讨影视鉴赏选修课程学生创新能力培养的实施路径。从"习、赏、感、研、作"联动培养模式入手,坚持知识、能力、素质的辩证统一,在课堂教学、课外鉴赏、社团辅助、鉴赏批评、创作实践这五方面全面提升课程教学与实践,进而实现提升学生创新能力培养的目的。     

“You Don't Play,You Volunteer”: Narrative Public Memory Construction in Medal of Honor: Rising Sun

Narrative and ludological analysis suggests that Electronic Arts’ Medal of Honor: Rising Sun constructs a narrative of World War II that selectively retells history and constructs an Orientalist representation of the Japanese Empire. The gaming environment exists as an interactive museum that immerses gamers into history so that they experience warfare in their homes. Combining newsreels, fictional letters from home, and interviews with veterans of the “Good War,” Medal of Honor: Rising Sun retells a history that omits details of Japanese internment or atomic weapons. The intertwined themes of personal revenge for the loss of a family member and historical revenge for the attack on Pearl Harbor guide gamers through an “educational” experience of the war. Finally, its failure to simulate violence means that Medal of Honor: Rising Sun invites a critical blindness to commemorating war.     

Priming Stereotypical Associations: Violent Video Games and African American Depictions

The following study examines the influence of racial representations in violent video games upon stereotype associations. Participants were assigned to play either a violent video game with a stereotypical African American avatar or a Caucasian avatar. Following game play, participants completed several measures related to aggression and an implicit association task. The results showed significant differences between the conditions for IAT response times. African American participants showed faster response times to stereotype associations of African Americans than participants who played as a Caucasian avatar. The results also showed a significant interaction effect between participant race and avatar race for aggressive affect.     

Challenges and Support When Teaching Science Through an Integrated Inquiry and Literacy Approach

In the Budding Science and Literacy project, we explored how working with an integrated inquiry-based science and literacy approach may challenge and support the teaching and learning of science at the classroom level. By studying the inter-relationship between multiple learning modalities and phases of inquiry, we wished to illuminate possible dynamics between science inquiry and literacy in an integrated science approach. Six teachers and their students were recruited from a professional development course for the current classroom study. The teachers were to try out the Budding Science teaching model. This paper presents an overall video analysis of our material demonstrating variations and patterns of inquiry-based science and literacy activities. Our analysis revealed that multiple learning modalities (read it, write it, do it, and talk it) are used in the integrated approach; oral activities dominate. The inquiry phases shifted throughout the students' investigations, but the consolidating phases of discussion and communication were given less space. The data phase of inquiry seems essential as a driving force for engaging in science learning in consolidating situations. The multiple learning modalities were integrated in all inquiry phases, but to a greater extent in preparation and data. Our results indicate that literacy activities embedded in science inquiry provide support for teaching and learning science; however, the greatest challenge for teachers is to find the time and courage to exploit the discussion and communication phases to consolidate the students' conceptual learning.     

Web search engine multimedia functionality

Web search engines are beginning to offer access to multimedia searching, including audio, video and image searching. In this paper we report findings from a study examining the state of multimedia search functionality on major general and specialized Web search engines. We investigated 102 Web search engines to examine: (1) how many Web search engines offer multimedia searching, (2) the type of multimedia search functionality and methods offered, such as “query by example”, and (3) the supports for personalization or customization which are accessible as advanced search. Findings include: (1) few major Web search engines offer multimedia searching and (2) multimedia Web search functionality is generally limited. Our findings show that despite the increasing level of interest in multimedia Web search, those few Web search engines offering multimedia Web search, provide limited multimedia search functionality. Keywords are still the only means of multimedia retrieval, while other methods such as “query by example” are offered by less than 1% of Web search engines examined.