Family Effects on Student Achievement in Hong Kong

We examine the effects of family structures and processes on student achievement in Hong Kong. Specifically, we show that the negative effects of single parenthood in past studies are not universal. In Hong Kong, 4,405 15-year-old students completed a questionnaire, and tests in reading, mathematics and science. We analysed the data using multilevel models of Rasch test scores and Warm estimated indices of questionnaire items. In all subjects, the scores of children living with single parents did not differ significantly from those of children living with two parents. Moreover, students living with no parents had lower reading and science scores than other students, and this effect was mediated by lower family investment and involvement.     

Developing a professional vision of classroom practices of a mathematics teacher: views from a researcher and a teacher

The term professional vision points to the many nuanced ways professionals see. This paper traces the development of a professional vision of a researcher and a teacher looking at classroom practices. The researcher’s interest was to capture and study notable aspects of the teacher’s practice. Through a coding scheme, disparate classroom events were organized and analyzed to yield a researcher’s professional vision of the teacher’s practices. For the teacher, through reviewing the video records of his own classroom practices, his professional vision provided a basis for him to reflect and develop professionally. Leveraging on the work of the researcher, he initiated and transformed his own practices. Their collaboration yielded a mutually informed development of professional vision of classroom practices. In juxtaposing the two developments, the researcher and the teacher’s views can be contrasted, their distinctive interests highlighted and common grounds explored. Some implications for developing professional vision are drawn, and it is in the common grounds of the teacher’s professional development and seeing with a goal of enhancing of student learning that hold some promise of a mutual interest in developing a professional vision of classroom practices.     

Enhancing and Upgrading Records for Video Recordings in OCLC's WorldCat Database: One Participant's Experience at Texas A&M University

ABSTRACT

In 2002, Texas A&M University (TAMU) Libraries obtained a National Level Enhance authorization for the OCLC visual materials format, allowing TAMU catalogers to upgrade records for video recordings in OCLC's WorldCat database at all encoding levels. This article presents examples of typical changes made by one cataloger to video recording records that were either enhanced or upgraded to full-level at TAMU during the last five years. Common changes included: correcting information in the title and statement of responsibility, correcting date information, adding or correcting information in notes, and creating access points. Issues encountered relating to enhancing and upgrading records in this format are also discussed.     

The spiral of silence: examining how cultural predispositions,news attention,and opinion congruency relate to opinion expression

This study examines new explanatory predictors behind the spiral of silence theory, using the issue of legalization of same-sex marriage in Singapore as the context of study. Our results show that fear of isolation and saving face were negatively associated with individuals' willingness to express their opinion on the issue, whereas news attention and issue salience were positively associated. Also, fear of isolation was negatively associated with individuals' willingness to offer a rationale for their opinion, whereas news attention and issue salience were positively associated. Power distance had no effects on outspokenness. Notably, news attention moderated the influence of fear of isolation and saving face on public outspokenness.     

All-aqueous multiphase microfluidics

Immiscible aqueous phases, formed by dissolving incompatible solutes in water, have been used in green chemical synthesis, molecular extraction and mimicking of cellular cytoplasm. Recently, a microfluidic approach has been introduced to generate all-aqueous emulsions and jets based on these immiscible aqueous phases; due to their biocompatibility, these all-aqueous structures have shown great promises as templates for fabricating biomaterials. The physico-chemical nature of interfaces between two immiscible aqueous phases leads to unique interfacial properties, such as an ultra-low interfacial tension. Strategies to manipulate components and direct their assembly at these interfaces needs to be explored. In this paper, we review progress on the topic over the past few years, with a focus on the fabrication and stabilization of all-aqueous structures in a multiphase microfluidic platform. We also discuss future efforts needed from the perspectives of fluidic physics, materials engineering, and biology for fulfilling potential applications ranging from materials fabrication to biomedical engineering.     

Biomechanical analysis of dragon boat paddling: A comparison of elite and sub-elite paddlers

Abstract

In this study, video and force analysis techniques were used to distinguish between dragon boat paddlers of different ability. Six elite paddlers (three males, three females) and six sub-elite paddlers (two males, four females) were compared during high-intensity paddling (80–90 strokes · min^?1). Video filming was conducted for two-dimensional kinematic analysis and an instrumented paddle was used to collect force data. Paddling efficiency, paddle force characteristics, and paddler kinematic variables were measured. Elite paddlers achieved higher paddling efficiency than sub-elite paddlers (elite: 76 ± 4%; sub-elite: 67 ± 10%; P = 0.080). Elite paddlers also showed higher peak force (elite: 16.3 ± 4.8 N · kg^?2/3; sub-elite: 11.4 ± 2.6 N · kg^?2/3; P = 0.052), average force (elite: 7.9 ± 2.8 N · kg^?2/3; sub-elite: 5.5 ± 1.4 N · kg^?2/3; P = 0.084), and impulse (elite: 3.0 ± 0.9 (N · s) · kg^?2/3; sub-elite: 1.9 ± 0.4 (N · s) · kg^?2/3; P = 0.026) than sub-elite paddlers, but these three results should be viewed with caution due to the small sample size and the unequal number of males and females in the two groups. Superior technique and greater strength enable the elite paddlers to achieve higher paddling efficiency. Paddlers use different joint movement patterns to develop propulsion, which are reflected in variations in the force–time curve.     

Consensus or dissensus? Stakeholders’ views on the role of play in learning

Across cultures and eras, children have engaged in play as part of the process of growing and maturing into adulthood. Play has been recognized as an effective form of pedagogy to promote learning in the early years. However, beliefs about what play is and how it should be practiced vary across Hong Kong and in other countries. Because Chinese culture places a heavy emphasis on academic achievement, a play-based curriculum has not been widely implemented in the region. Through classroom observations and interviews with key stakeholders in early childhood education, namely parents, teachers, and principals, this study reveals the complexity of views on this matter and uncovers the root cause of the difficulties in supporting play in the Hong Kong kindergartens. These findings may help promote the play-based curriculum in Hong Kong and other countries where play is in crisis.     

Contribution of discourse and morphosyntax skills to reading comprehension in Chinese dyslexic and typically developing children

This study aimed at identifying important skills for reading comprehension in Chinese dyslexic children and their typically developing counterparts matched on age (CA controls) or reading level (RL controls). The children were assessed on Chinese reading comprehension, cognitive, and reading-related skills. Results showed that the dyslexic children performed significantly less well than the CA controls but similarly to RL controls in most measures. Results of multiple regression analyses showed that word-level reading-related skills like oral vocabulary and word semantics were found to be strong predictors of reading comprehension among typically developing junior graders and dyslexic readers of senior grades, whereas morphosyntax, a text-level skill, was most predictive for typically developing senior graders. It was concluded that discourse and morphosyntax skills are particularly important for reading comprehension in the non-inflectional and topic-prominent Chinese system.     

Event-based discrete-time multi-agent consensus over signed digraphs with communication delays

The ability to ensure the desired performance of the cooperative-antagonistic multi-agent networks (MANs) in the presence of communication constraints is an important task in many applications of real systems. In this paper, under the proposed event-triggered condition (ETC), different types of consensus are obtained under different network topology. We concentrates on the event-based bipartite consensus. It is shown that under the proposed ETC (i) the addressed cooperative-antagonistic network with arbitrary communication delays reaches bipartite consensus provided that the network is balanced; (ii) the network model reaches zero if the network is unbalanced. Further, to avoid the continuously verifying the triggering condition, a self-triggered algorithm is proposed for realizing the bipartite consensus of the network model. A numerical example is given to illustrate the effectiveness of the theoretical results.     

Massification of higher education and youth transition: skills mismatch,informal sector jobs and implications for China

This study adopts a nationwide survey data set between 2005 and 2013 (Chinese General Social Survey) to explore the influence of the massification of higher education on the transition of Chinese youth into the labour market. Data analysis reveals two major findings. First, the economic returns to college education of recent cohorts of university graduates (those who have graduated from universities not more than 3 years ago) are lower than the cohorts who graduated in 2005 and 2006. Second, recent cohorts of college graduates are likely to work in the urban informal sector, unlike their senior counterparts. These findings could partially be explained by skills mismatch in the labour market but a comprehensive understanding of graduate unemployment in China could be obtained by bringing the broader political economy perspective into the analysis.