基于单片机控制的噪声实时监测

外界噪声信号通过传声器转换成音频信号，经过放大和V／F变换输入到单片机进行处理，并转换成相应的DB值通过LED显示，从而实现噪声的实时监测。其实现简单，精确度高，可用于实际进行噪声的实时监测。     

SiO2负载纳米级SO42-/TiO2固体超强酸的制备及其催化合成乙酸丁酯的研究

制备了SiO2负载纳米级SO4^2-/TiO2固体超强酸，对其催化活性、重复使用效果、失活原因及再生方法进行了研究。     

Effects of witness characteristics on the perception and reportage of child abuse

Vignettes depicting the physical mistreatment, psychological mistreatment and neglect of children were used in an experimental design to test for bias in perception and reportage of child abuse. Subjects were 160 jurors and 176 child protective service (CPS) and police personnel. Jurors born before 1945 were less critical of such mistreatment than those born later. Female jurors pledged to report mistreatment more often than did male jurors, and they pledged to report the abuse of a female victim more often than a male victim. The other groups did not show this bias in reporting. Findings might explain discrepancies between studies of the incidence of child abuse and reportage of it.     

Development of shared vision: Lessons from a science education community collaborative

This is a qualitative case study of a collaboration among multiple stakeholders in science education who came together in order to create environmental field trips and the surrounding classroom curriculum. The collaboration involves 4 major facets of science education: formal education at the elementary and university levels, informal education, and educational research. The data were collected by means of observation, semi‐structured interviews, and written document review. This study examines how shared vision developed within the collaboration, the roles the participants played in its evolution, and how this process benefited both the collaboration and each individual collaborator. Several factors significantly affected the progress towards a shared vision and a successful collaboration including time, communication, understanding others' perspectives, dedication and ownership, as well as the collaborative environment. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 681–705, 2007     

Science achievement of english language learners in urban elementary schools: Results of a first‐year professional development intervention

This study is part of a 5‐year professional development intervention aimed at improving science and literacy achievement of English language learners (or ELL students) in urban elementary schools within an environment increasingly driven by high‐stakes testing and accountability. Specifically, the study examined science achievement at the end of the first‐year implementation of the professional development intervention that consisted of curriculum units and teacher workshops. The study involved 1,134 third‐grade students at seven treatment schools and 966 third‐grade students at eight comparison schools. The results led to three main findings. First, treatment students displayed a statistically significant increase in science achievement. Second, there was no statistically significant difference in achievement gains between students at English to Speakers of Other Language (ESOL) levels 1 to 4 and students who had exited from ESOL or never been in ESOL. Similarly, there was no significant difference in achievement gains between students who had been retained on the basis of statewide reading test scores and students who had never been retained. Third, treatment students showed a higher score on a statewide mathematics test, particularly on the measurement strand emphasized in the intervention, than comparison students. The results indicate that through our professional development intervention, ELL students and others in the intervention learned to think and reason scientifically while also performing well on high‐stakes testing. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 31–52, 2008     

Measuring need for closure in classroom learners

Need for closure, as formulated by Kruglanski and colleagues [Kruglanski, A. W. (1990). Lay epistemic theory in social-cognitive psychology. Psychological Inquiry, 1(3), 181–197; Kruglanski, A. W., & Webster, D. M. (1996). Motivated closing of the mind: Seizing and freezing. Psychological Review, 103, 263–283; Webster, D. M., & Kruglanski, A. W. (1994). Individual differences in need for cognitive closure. Journal of Personality and Social Psychology, 76(6), 1049–1062], refers to the motivated tendency to seek structure, simplify complex information, and avoid ambiguity. In this article, we argue that this motive may impact classroom learning in important ways and introduce a self-report measure of need for closure situated in the classroom learning environment. Psychometric properties of the new measure are assessed in multiple samples using exploratory and confirmatory factor analysis. Correlations between the new measure and existing indicators of cognitive closure, as well as variables known to influence motivation and academic achievement, support our assertions regarding the association between need for closure and academic functioning while also providing evidence for the construct validity of the measure. Finally, internal consistency and test–retest reliability suggest that the new measure functions as a reliable measure of need for closure within the classroom.     

A mixed-method study of EFL teachers’ Internet use in language instruction

Information and communication technology has affected language instruction in Taiwanese higher education. Varieties of assorted Internet tools are incorporated in educational settings to engage students in learning. To facilitate the improvement of teacher preparation for Internet use, it is important to study the factors influencing teachers in integrating the Internet into their instruction. A concurrent mixed-method approach is employed in this study. Both quantitative and qualitative results show that teacher training is crucial for Internet-integration instruction by the teachers of English as a foreign language (EFL) in Northern Taiwanese higher education institutions. Continuous professional development focused on technology application in language instruction is imperative.     

Disciplinary regimes of ‘care’ and complementary alternative education

In schools, the notion of ‘care is often synonymous with welfare and disciplinary regimes. Drawing on Foucault, and a study of alternative education (AE) across the UK, and looking in depth at two cases of complementary AE, we identify three types of disciplinary regimes at work in schools: (1) dominant performative reward and punishment, (2) team-building and (3) therapeutic. We argue that while all three regimes aim to steer identified students back to the norm, the two complementary approaches that we saw avoided the narrow instrumental behaviourist approaches of the dominant pattern. In so doing, they also opened up wider horizons of possibility and ways to be and become.