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.     

基于TMS320F2812事件管理器的一种测频方法

本文设计了一套以TI公司TMS320F2812芯片为控制核心的频率测量装置。文章利用其片内外设事件管理器的捕获功能,给出了一种简单的测频方法,其硬件电路大为简化,测频装置的可靠性极大提高,而且测频精度较高,提高了发电机励磁调节的可靠性和控制精度。     

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.     

射频识别技术在图书档案馆中的应用研究

对射频识别技术的系统组成及工作原理进行概述,并比较射频识别技术与条形码技术的不同。对射频识别技术在国内外图书档案馆中应用的实例进行分析,对使用射频识别技术的利弊进行比较,得出应在图书档案馆中推广使用射频识别技术的结论,并指出射频识别技术在图书档案馆中的应用前景。     

同步录音录像制度的功能、问题与期待

同步录音录像具有规范侦查取证、保障公民权利、证明取证合法以及增强办案能力的制度功能,但新刑事诉讼法中有关同步录音录像的规定比较笼统,实践中选择性录音录像成最大难题。现阶段有必要鼓励对所有刑事案件进行录音录像、对“全程录制”进行严格界定与执行,同时规范同步录音录像的相关操作程序,并在实践中探索同步录音录像实施的制度性保障。     

李沙育图形在电子测量中的应用浅析

李沙育图形不仅能真实的反应了电子示波器测量的原理,还能测量交流信号的频率与相位．在该文中通过举例列出了如何快速的测量任意交流信号的频率与相位．     

FFH/MFSK系统抗干扰性能研究

针对FFH/MFSK通信系统的特点,推导了在赖斯衰落信道下,多音干扰产生的虚警检测概率和漏检概率数学表达式,并研究了不同参数对系统BER性能的影响. 仿真结果表明,在多音干扰功率大于一定值时,多音干扰数量是造成系统BER性能下降的主要因素.     

越溪河春季底栖动物的群落结构及水质评价

2009年4月中、下旬对岷江支流越溪河底栖动物群落结构进行了调查,并应用生物指数对河水水质进行了综合评估.结果表明：越溪河春季共采集到底栖动物46种,其中节肢动物22种,软体动物19种,环节动物4种,扁形动物1种.不同微生境底栖动物种类组成、平均生物量和各类群平均密度差异较大,体现了植被较丰富、工业相对不发达而水电开发较早的丘陵地区河流底栖无脊椎动物群落结构的典型特征.生物指数评价结果显示小井沟河段水质清洁,符合饮用水标准.     

单相逆变器电源的研制

介绍了单相正弦脉宽调制逆变器的工作原理和利用集成脉宽调制器SG3525产生SPWM波的方法，给出了样机实验的结果。