消除神经信号采样中噪声的数字滤波技术及其比较

针对多种噪声的干扰,采用自适应平滑技术、自适应滤波技术、普通数字滤波器和一种用于消除50Hz市电干扰的方法在Compaq 286e微机上对人体正中神经束内诱发的单一传入电位的波形特征进行处理,发现自适应滤波及快速算法可以很好地消除市电干扰,但电位波形发生严重畸变而自适应平滑的效果比较理想;后者适应范围较广,对降低神经电位的各种干扰有明显效果;快速算法可用于生物信号的实时处理.     

Spirit of the game: Empowering students as designers in schools?

The aim of this paper and the one which follows is to explore how the potential of computer games may be taken up in schools to support learning engagement among students. It is not the intention of the papers to dismiss existing classroom practices or overlook accounts of innovative practices in schools; the papers' aim is to provide educators who are interested in exploring the use of computer games in schools with information and ideas about how these games may be effectively used to engage students in their learning. This paper questions whether the empowerment of students to create games for one another based on the school curriculum may address the insignificance of computer games in the sociocultural setting of the school. Both papers have been commissioned by Microsoft (Asia‐Pacific) under the Partners‐In‐Learning Initiative. Under this initiative, Microsoft establishes partnerships with ministries of education, national and local government bodies, and other stakeholders to empower students and teachers to realize their full potential, mediated by information and communication technologies.     

Learning Styles Relevant to Identified Personality Types of Secondary Level Students

This study investigated the inter-relationships between learning styles as measured by Kolb's Learning Style Inventory 1985 (LSI) and personality types as measured by Myers-Briggs Type Indicator (MBTI). The two instruments were administered to tenth grade students in Singapore. The canonical correlation analysis revealed two significant canonical correlation coefficients, indicating moderate relationships between the variables of the LSI and MBTI. The canonical variates represented abstract thinking and reflective thinking, factors associated by the students with academic achievement. The LSI types and the MBTI learning profiles of the sample were also examined.     

Auxetic polymers: a new range of materials

Materials with a negative Poisson's ratio (auxetic materials) have the fascinating property of becoming fatter when stretched. This article describes some of the consequences of this phenomenon and some of the routes for making polymers with this property. Potential applications for these materials are reviewed.     

Entry and competitive dynamics in the mobile telecommunications market

We propose an extension of the Gans-Stern [Gans, J.S., Stern, S., 2003. The product market and the market for “ideas”: commercialization strategies for technology entrepreneurs. Research Policy 32 (2), 333-350] framework that includes entry by existing firms. An incumbent firm possessing complementary assets and strong appropriability is in a formidable position [Teece, D.J., 1986. Profiting from technological innovation: implications for integration, collaboration, licensing, and public policy. Research Policy 15 (6), 285-305]. However, a de alio entrant can leverage complementary assets to enter along a new technological trajectory, and then develop appropriability. We illustrate how several mobile telecommunications firms (Ericsson, Nokia and Samsung) pursued this strategy to catch up with the market leader (Motorola). We also identify several shortcomings in Motorola's approach: it was too inward-looking in developing technologies, but ironically not inward-looking enough in exploiting its most valuable patents.     

Domesticating algorithms: An exploratory study of Facebook users in Myanmar

Abstract

This exploratory study investigates the encounters and everyday experiences with the Facebook algorithm of 18 informants in Yangon, Myanmar. It draws on domestication theory and research on algorithms to understand how users come to use and respond to Facebook. Findings showed that their particular perception of Facebook algorithm—Friends funnel information—informs their domestication process, wherein they add strangers as Friends to draw more information flows to their News Feeds.     

Nurturing Giftedness Through the Mentor‐Link Programme

Recognising that gifted students need to interact with mentors to achieve their potential, the Chinese High School (CHS) in Singapore launched the Mentor‐Link (M‐L) programme to guide its gifted students in their projects. Gifted students are given the opportunity to interact and share mutual interests and passions with scientists in professional and tertiary institutions. The M‐L programme is structured by guidelines on the roles of students, teacher advisors, mentors and evaluation of projects. Over the last two years, students have done some good projects in the areas of Applied Science, Biology, Innovation, Defence Science, Robotics and Mathematics. Mentoring has provided the CHS gifted programme with an opportunity to deal with the heterogeneity of talents in gifted students and enhance their potential.     

Explicating factual and subjective science knowledge: knowledge as a mediator of news attention and attitudes

Communication scholars have conflicting views on the relationship between exposure to science news and knowledge, and its subsequent influence on attitudes. Such mixed sentiments could arise from the vague definition of knowledge. Therefore, this paper explicates science knowledge into factual knowledge and subjective knowledge. It also compares the mediating roles of both types of knowledge between news attention and public support for science and technology (S&T). A survey of 967 Singaporeans showed that news attention was positively related to both factual and subjective knowledge. The findings revealed a stronger relationship between subjective knowledge and news attention than factual knowledge and news attention. Additionally, factual knowledge was positively related to public support for S&T, but subjective knowledge was negatively related to public support for S&T. The contrasting directions of these associations demonstrate that factual and subjective knowledge are two distinct dimensions of knowledge. Practically, the findings can inform policymakers and communication practitioners about effective public education and engagement initiatives. This study also provided guidelines for newsmakers in news reporting about S&T.