Hybrid capillary-inserted microfluidic device for sheathless particle focusing and separation in viscoelastic flow     

Jeonghun Nam  Justin Kok Soon Tan  Bee Luan Khoo  Bumseok Namgung  Hwa Liang Leo  Chwee Teck Lim  Sangho Kim 《Biomicrofluidics》2015,9(6)

A novel microfluidic device which consists of two stages for particle focusing and separation using a viscoelastic fluid has been developed. A circular capillary tube was used for three-dimensional particle pre-alignment before the separation process, which was inserted in a polydimethylsiloxane microchannel. Particles with diameters of 5 and 10 μm were focused at the centerline in the capillary tube, and the location of particles was initialized at the first bifurcation. Then, 5 and 10 μm particles were successfully separated in the expansion region based on size-dependent lateral migration, with ∼99% separation efficiency. The proposed device was further applied to separation of MCF-7 cells from leukocytes. Based on the cell size distribution, an approximate size cutoff for separation was determined to be 16 μm. At 200 μl/min, 94% of MCF-7 cells were separated with the purity of ∼97%. According to the trypan blue exclusion assay, high viability (∼90%) could be achieved for the separated MCF-7 cells. The use of a commercially available capillary tube enables the device to be highly versatile in dealing with particles in a wide size range by using capillary tubes with different inner diameters.  相似文献   

Behavioral Intention to Adopt Digital Library by the Undergraduates     

Krishna Moorthy  Loh Chun T'ing  Kiing Siew Ming  Chiong Chui Ping  Ler Yu Ping  Lim Qiao Joe 《International Information and Library Review》2019,51(2):128-144

The purpose of this research is to investigate the factors that affect undergraduates' behavioral intention to use digital library among the private universities in Malaysia. The target respondents are undergraduates from Malaysian private universities. Questionnaires were distributed among 500 undergraduates through either online or face-to-face method. Reliability test, normality test, Pearson Correlation Coefficient analysis, and Multiple Linear Regression (MLR) were carried out for data analysis. Performance expectancy, social influence, facilitating conditions, hedonic motivation, habit, and information quality had a positive and significant association with behavioral intention to adopt a digital library except for effort expectancy. This research successfully reinforced that the inspiration to ameliorate Unified Theory of Acceptance and Use of Technology 2 (UTAUT 2) by synthesis of Information Systems Success Model (ISSM). This proposed framework with a combination of ISSM and UTAUT 2 has enhanced the fitness of UTAUT 2. Universities that have yet to implement digital library can comprehend undergraduates' needs better by considering all the significant factors to develop a digital library. The universities with the digital library may also notice the important features of the existing digital library that should be maintained and upgraded constantly so that they can fulfil undergraduates' requirements.  相似文献   

Instruction Via Web-Based Modules in Early Childhood Personnel Preparation: A Mixed-Methods Study of Effectiveness and Learner Perspectives     

Heidi L. Hollingsworth  Chih-Ing Lim 《Early Childhood Education Journal》2015,43(2):77-88

  相似文献   

Assessing the Efficacy of Contextualized Group Counseling Education in Asia: A Mixed Methods Study     

Sing-Kiat Ting  Rachel  Jian-Ai Thong  Justine  Lim  Joy Yung-Re  Jones  Elizabeth 《International journal for the advancement of counseling》2022,44(3):550-568

International Journal for the Advancement of Counselling - Many experiential learning teaching models are developed in Western cultures, with their efficacy not tested in non-Western cultures,...  相似文献   

The History of Modern Organized Badminton and the Men’s Team Thomas Cup Tournaments, 1948–1979     

Peng Han Lim  Mohd Salleh Aman 《国际体育史杂志》2017,34(7-8):676-696

Modern organized international badminton began with the founding of the International Badminton Federation (IBF) in 1934, consisting of nine founding member associations. The inaugural men’s Thomas Cup tournament began in 1948 when 10 countries took part. Malaya won the Cup four times in 1949, 1952, 1955, and 1967. When Indonesia took part in the tournament for the first time in 1957, there were 19 competing teams. Indonesia won the triannual tournament seven times from 1957 to 1979. Throughout the 11 Thomas Cup tournaments, only two Asian countries have won the Cup. The only European country, Denmark, qualified to play in the finals five times without a single win. Malaya (later known as Malaysia), Indonesia, and Denmark became leading Thomas Cup teams because they produced singles and doubles players that won many All-England Badminton Championship titles. The winners of these titles were generally considered the world champions. The key sources of information for this research consisted of the IBF annual statutes for listing of participating nations, tournament programmes, and rare specialized books on badminton and the Thomas Cup competition. English language newspapers such as the Singapore Free Press and the Straits Times published historical match results for checking the secondary data collected.  相似文献   

An optofluidic volume refractometer using Fabry�CP��rot resonator with tunable liquid microlenses     

L. K. Chin  A. Q. Liu  C. S. Lim  C. L. Lin  T. C. Ayi    P. H. Yap 《Biomicrofluidics》2010,4(2)

  相似文献   

Time spent on the Internet by multicultural adolescents in Korea     

Yangmi Lim 《Asia Pacific Journal of Education》2017,37(1):55-68

This study analysed The 8th Online Survey of Adolescent Health and Behaviour in 2012, which is a government-approved statistical survey of Internet use and patterns in Korea. We conducted a propensity score matching (PSM) to control for economic status differences between monocultural and multicultural families and an ANOVA to estimate the effects of multicultural family status, adolescents’ gender, school grades, locality, and parents’ academic background on adolescents’ Internet use (for studying and entertainment). The study revealed the following: with regard to Internet use patterns, adolescents from both monocultural and multicultural families selected gaming as their first choice, followed by studying and data searching. Furthermore, main and interaction effects of independent variables on adolescents’ time spent on the Internet for studying were not significant. However, the interaction effects of multicultural family status and mothers’ academic background on adolescents’ time spent on the Internet for entertainment were statistically significant. Specifically, adolescents’ time spent on the Internet for entertainment was higher in multicultural families with mothers whose education level was lower than middle school. Finally, we suggested that the government should provide full support to less educated mothers in multicultural families for effectively and constructively controlling their children’s Internet use and teaching it to them.  相似文献   

Making Space for Place: Mapping Tools and Practices to Teach for Spatial Justice     

Laurie H. Rubel  Maren Hall-Wieckert  Vivian Y. Lim 《学习科学杂志》2017,26(4):643-687

This article presents a set of spatial tools for classroom learning about spatial justice. As part of a larger team, we designed a curriculum that engaged 10 learners with 3 spatial tools: (a) an oversized floor map, (b) interactive geographic information systems (GIS) maps, and (c) participatory mapping. We analyze how these tools supported learning using notions of politicization. The floor map fed conceptual understandings of the map as a representational text and served as the terrain for an embodied activity to support proportional reasoning about inequitable distributions of resources. The data-rich GIS maps and their zoomability allowed for coordinating across multiple variables to connect patterns in inequities to other social processes. The participatory mapping enabled learners to make discoveries about, connect, and share beyond the individual classroom counterstories from people in the lived streets of their neighborhood. In aggregate, this set of spatial tools produced a complex, hybrid view of the city’s space, which contributed to learners’ political formation.  相似文献   

Transformative Professional Learning Within Schools: Relationship to Teachers’ Beliefs, Expertise and Teaching     

Brad W. Kose  EunYoung Lim 《The Urban Review》2011,43(2):196-216

Although scholarship and research have demonstrated the positive impact of professional learning on academic teaching and learning, an inadequate amount of research has examined how professional learning is associated with transformative teaching for equity, diversity and social justice. This survey study explored the relationship between professional learning and teachers’ beliefs about diversity, transformative expertise, and transformative teaching by comparing two models of professional learning in 25 small urban elementary schools. Results indicated that factors in both the process and transformative content models predicted differences in teachers’ reported beliefs, expertise, or teaching. While some factors such as learning to teach for social justice consistently predicted increased transformative practices, other factors failed to predict or were associated with decreased transformative practices. After discussing the findings, implications for practice, theory and research are offered.  相似文献   

How do congressional members appear on the web? Tracking the web visibility of South Korean politicians     

Yon Soo Lim  Han Woo ParkAuthor vitae 《Government Information Quarterly》2011,28(4):514-521

The web visibility of politicians has substantial implications for the internet and politics. In this regard, the present paper examines the web visibility of South Korea's 18th National Assembly members. This study identifies those members with the highest web visibility and determines the factors affecting their web visibility by using a set of socio-demographic variables indicating web visibility. The concept of web visibility is operationally defined as the number of web mentions of each congressional member. Web mentions of the name of each congressional member were collected across many platforms, including blogs, images, news, and websites, by using a Naver search tool based on the API, and relationships between the web visibility of the members and their socio-demographic attributes (their gender, age, term, constituency, and party affiliation) were analyzed using Kruskal–Wallis, Median, and Mann–Whitney U tests. The most visible politicians in the Korean webosphere had highly qualified political careers and prominence, and the difference in politicians' web visibility depended on their political attributes (their term, constituency, and party), not on their demographic attributes (their gender and age). These findings suggest that politicians who build political power and influence through their political career in the offline world are likely to be more visible in the webosphere. Further, an integrated indicator based on politicians' web visibility status can reflect their “ubiquitous presence” in Korea's digitalized society.  相似文献