Shape memory behavior of SMPU knitted fabric   总被引：5，自引：0，他引：5  

LIU Yan CHUNG Aggie HU JinLian LV Jing 《浙江大学学报(A卷英文版)》2007,8(5):830-834

A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knitting fabric is presented in this paper. Three SMPU knitted fabrics series with different content of SMPU fibers: 100% SMPU, 50% SMPU and 50% cotton, 16% SMPU and 84% cotton are designed and manufactured in our lab. Their shape memory behaviors at different temperatures are characterized in terms of bagging. Our experimental results showed that shape memory effect can be improved with increasing content of SMPU fibers. A comparison between Lycra and SMPU knitted fabrics was also made to validate the shape memory effects of SMPU knitted fabrics.  相似文献   

Cognitive-linguistic profiles of Chinese typical-functioning adolescent dyslexics and high-functioning dyslexics     

Kevin Kien Hoa Chung  Jason C. M. Lo  Catherine McBride 《Annals of dyslexia》2018,68(3):229-250

Dyslexia is a developmental disability affecting the acquisition of reading and writing skills, and its developmental nature makes longitudinal research of great importance. This study therefore investigated the cognitive-linguistic profiles of the typical-functioning dyslexics and high-functioning dyslexics with longitudinal cohorts of Chinese-speaking adolescents diagnosed with childhood dyslexia. These two dyslexic groups of fifty students (with 25 typical-functioning dyslexics) were assessed in Grade 2 (Time 1) and in Grade 8 (Time 2), whereas 25 typically developing controls were assessed at Time 2. Students were administered measures of phonological awareness, morphological skills, visual-orthographic knowledge, rapid naming, verbal working memory, and literacy skills. Results showed that, at Time 2, both dyslexic groups performed less well than the control group on most of the measures. Deficits in rapid naming were particularly salient in both dyslexic groups. Comparing the two dyslexic groups, the typical-functioning dyslexics had more multiple deficits than the high-functioning dyslexics. Findings highlight the importance of rapid naming deficits as potential universal causes of dyslexia and the utility of targeting visual-orthographic knowledge and morphological skills in supporting the development of dyslexic adolescents.  相似文献   

Presentation Factors in the Learning of Chinese Characters: The order and position of Hanyu pinyin and English translations     

Kevin K. H. Chung 《教育心理学》2007,27(1):1-20

The influence of different instructional presentations upon meaning and pronunciation acquisition in character learning was examined. High school students learned to identify a series of characters in terms of their associated pinyin and English translation prompts. Acquisition was shown to proceed more rapidly when the Chinese character was presented before rather than after the prompts. The addition of colour‐coded prompts led to superior learning. Retention over two weeks was greater in the case of characters presented before prompts with colour‐coding. These data are interpreted in terms of split attention, which arises when learners attend to multiple inputs simultaneously, and the beneficial effects of attending to a character prior to its prompts. The presentation of the Chinese character first and then its pinyin and colour‐coded English translation is recommended.  相似文献   

Audience Motivations for Using Interactive Features: Distinguishing Use of Different Types of Interactivity on an Online Newspaper     

Deborah S. Chung  Chan Yun Yoo 《Mass Communication and Society》2013,16(4):375-397

This study examines audience uses of three types of interactivity, user motivations for visiting an online newspaper, and the relationship between user motivations and use of the different types of interactive features. There are three types of interactivity on a continuum: medium, human/medium, and human interactivity. In an online survey of 542 respondents, results indicate that medium interactive features were used most frequently and human interactive features used the least. Three motivations for using online newspapers emerged—information seeking/surveillance, socialization, and entertainment. In addition, further analysis found that although all three motivations were predictors of use of medium interactive features, the information seeking/surveillance motivation was not a significant predictor of use of human/medium and human interactive features.  相似文献   

Food and Beverage Advertising on U.S. Television: A Comparison of Child-Targeted Versus General Audience Commercials     

Ron Warren Ph.D.  Robert H. Wicks Ph.D.  Jan LeBlanc Wicks Ph.D.  Ignatius Fosu Ph.D.  Donghung Chung Ph.D. 《广播与电子媒介杂志》2013,57(2):231-246

Major advertisers and children's television networks have announced marketing policies designed to combat childhood obesity. A content analysis of food advertising was conducted on programming from broadcast and cable networks most likely to be viewed by children. Unlike previous content analyses, the results show that nutrition appeals are among the most frequently used. However, as in past research, unhealthy foods are most frequently advertised. Further, child-targeted commercials employ production techniques and persuasive appeals that children have found difficult to evaluate critically. The potential impacts of this advertising landscape are discussed on both the individual and social level.  相似文献   

Racism and Asian American Student Leadership     

Jennifer Y. Chung 《Equity & Excellence in Education》2013,46(2):117-132

This article provides a theoretical analysis and ethnographic account of Asian American student leadership in higher education. Existing literature highlights Asian and Asian American leadership styles as cultural differences. I shift the analysis from culture to racism in order to work toward a more socially just conception of Asian American student leadership, grounded in the social and historical realities of racism in the U.S. I bring the issue of racism to the forefront by framing this project in racial formation theory and Orientalism and by looking at Asian American student leadership in the context of anti-racism activism. Participants challenged the notion of “Asian American leadership” in two ways: First, students described how they struggled with the Asian American racial category in their day-to-day lives as student leaders, and second, they discussed the negative consequences of being racialized as Asian American leaders.  相似文献   

Why might relative fit indices differ between estimators?     

Li‐Jen Weng  Chung‐Ping Cheng 《Structural equation modeling》2013,20(2):121-128

Previous research indicates that relative fit indices in structural equation modeling may vary across estimation methods. Sugawara and MacCallum (1993) explained that the discrepancy arises from difference in the function values for the null model with no further derivation given. In this study, we derive explicit solutions for parameters of the null model. The null model specifies the variances of the observed variables as model parameters and fixes all the covariances to be zero. Three methods of estimation are considered: the maximum likelihood (ML) method, the ordinary least squares (OLS) method, and the generalized least squares (GLS) method. Results indicate that ML and LS yield an identical estimator, which is different from GLS. Function values and associated chi‐square statistics of the null model vary across estimation methods. Consequently, relative fit indices using the null model as the reference point in computation may yield different results depending on the estimation method chosen. An illustration example is given and implications of this study are discussed.  相似文献   

Do Cultural Attitudes Matter? The Role of Cultural Orientation on Academic Self‐Concept Among Black/African College Students     

Wendi S. Williams  Y. Barry Chung 《Journal of College Counseling》2013,16(3):228-242

The authors explored the relationship between academic self‐concept and noncognitive variables (i.e., Africentric cultural orientation, academic class level, gender, and involvement in culturally relevant school and community activities) among Black/African college students. Results indicated that Africentric cultural orientation and academic class level were significantly related to academic self‐concept. Female students had higher scores on the Academic Self‐Concept Scale ( Reynolds, Ramirez, Magrina, & Allen, 1980 ) compared with their male peers. Implications for counseling practice and future research are discussed.  相似文献   

Implementation of tetra-poly(ethylene glycol) hydrogel with high mechanical strength into microfluidic device technology     

Hiroaki Takehara  Akira Nagaoka  Jun Noguchi  Takanori Akagi  Takamasa Sakai  Ung-il Chung  Haruo Kasai  Takanori Ichiki 《Biomicrofluidics》2013,7(5)

Hydrogels have several excellent characteristics suitable for biomedical use such as softness, biological inertness and solute permeability. Hence, integrating hydrogels into microfluidic devices is a promising approach for providing additional functions such as biocompatibility and porosity, to microfluidic devices. However, the poor mechanical strength of hydrogels has severely limited device design and fabrication. A tetra-poly(ethylene glycol) (tetra-PEG) hydrogel synthesized recently has high mechanical strength and is expected to overcome such a limitation. In this research, we have comprehensively studied the implementation of tetra-PEG gel into microfluidic device technology. First, the fabrication of tetra-PEG gel/PDMS hybrid microchannels was established by developing a simple and robust bonding technique. Second, some fundamental features of tetra-PEG gel/PDMS hybrid microchannels, particularly fluid flow and mass transfer, were studied. Finally, to demonstrate the unique application of tetra-PEG-gel-integrated microfluidic devices, the generation of patterned chemical modulation with the maximum concentration gradient: 10% per 20 μm in a hydrogel was performed. The techniques developed in this study are expected to provide fundamental and beneficial methods of developing various microfluidic devices for life science and biomedical applications.  相似文献   

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

Pakey Pui-man Chik  Connie Suk-han Ho  Pui-sze Yeung  Yau-kai Wong  David Wai-ock Chan  Kevin Kien-hoa Chung  Lap-yan Lo 《Annals of dyslexia》2012,62(1):1-18

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.  相似文献