Ripple structure-generated hybrid electrokinetics for on-chip mixing and separating of functionalized beads     

I-Fang Cheng  Sheng-Chuan Chiang  Cheng-Che Chung  Trai-Ming Yeh  Hsien-Chang Chang 《Biomicrofluidics》2014,8(6)

We present an electrokinetics-based microfluidic platform that is capable of on-chip manipulating, mixing, and separating microparticles through adjusting the interrelated magnitudes of dielectrophoresis and AC electroosmosis. Hybrid electrokinetic phenomenon is generated from an electric field-induced micro-ripple structure made of ultraviolet-curable glue. Size-dependent particle separation and selective removal over the ripple structure is demonstrated successfully. Varying the waveform from sine-wave to square-wave allows generating a fluid convection at specific positions to mix the antibody-functionalized beads and antigen. Potential application in the bead-based immunoassay was also demonstrated for immuno-reaction and subsequently separating the bead-bead aggregate and non-binding beads on-chip.  相似文献   

An economic valuation study of public libraries in Korea     

Young Man Ko  Wonsik Shim  Soon-Hee Pyo  Ji Sang Chang  Hye Kyung Chung 《Library & information science research》2012

The economic value of public libraries for local residents in Korea was measured. An economic-value measurement model that enables the estimation of diverse types of public library services was designed, using a conditional-value measurement method. Benefits were taken as the value of the main services provided by public libraries, such as accessibility to informational materials, facilities, and programs. Costs included the total amount of expenses at libraries such as personnel expenses, materials purchasing expenses, and other operational costs. Data were collected from 1220 users from 22 public libraries in the province of Seoul/Gyeonggi-do and the other seven Korean provinces. The return on investment (ROI) was calculated to be 3.66.  相似文献   

To work or to continue to higher education? The choice of senior secondary students in Shenzhen, China     

Fan-Sing Hung  Yue-Ping Chung  Esther Sui-Chu Ho 《Higher Education》2000,39(4):455-467

In the planning and development of highereducation, it is necessary to understand the majorfactors affecting senior secondary students' decisionson whether to continue to higher education or to enterinto labor force. This is particularly important incountries shifting from a centrally-planned economy toa market-oriented economy where individuals areallowed free choice. This study in 1997 surveyed theeducational intentions of 1,513 senior secondarystudents in Shenzhen, the first and largest SpecialEconomic Zone (SEZ) in China which has adopted amarket-oriented economy and an open door policy for thelast two decades. Ninety percent of students in thestudy opted to continue into higher education oncompletion of senior secondary education. Theyexpected a much higher rate of return to highereducation than the remaining ten percent of studentswho opted to work after completing senior secondaryeducation. The analysis of logistic regression usedin this study reveals that students' expected rate ofreturn to higher education has a positive andsignificant effect on their intention to pursue highereducation, after controlling for the effects of thestudents' gender, family background and ability. Itis evident that students in this study acted inaccordance with predictions in the human capitaltheory in making their choice of higher education orwork in the market-oriented economy sector of China. This pattern of educational choice has importantbearing on the development of higher education indeveloping countries.  相似文献   

Thoughts on education for an age of synthesis     

Bom Mo Chung 《Asia Pacific Education Review》2000,1(1):5-11

The predicaments which the industrial age of the twentieth century has left with us are briefly discussed, namely nature in peril, man in crisis and nation at risk. It is argued that these predicaments are brought upon us by the predominantly analytic thinking of the past century represented in the various forms of dichotomize such as mind and matter, man and nature, East and West, etc. It is, then, asserted that the twenty-first century should an age of synthesis, which the education for synthesis are specifically highlighted and discussed: the philosophy of the whole person, the building of sequentially broader self-identities, and strategies of conflict solution. Editor’s note Address presented at the First International Conference Editor’s note Address presented at the First International Conference Editor’s note Address presented at the First International Conference Editor’s note Address presented at the First International Conference Editor’s note Address presented at the First International Conference  相似文献   

Ethnic Differences in Career,Academic, and Social Self-Appraisals Among Incoming College Freshmen     

Y. Barry Chung  William E. Sedlacek 《Journal of College Counseling》1999,2(1):14-24

Ethnic differences in self-appraisals among 2,743 incoming college freshmen were examined in this study. Results showed that (a) Asian and Black students reported lower academic and social self-appraisals than did White students, and (b) Asian students reported lower career and social self-appraisals than did Black students. Practical and research implications are discussed in the article.  相似文献   

Internationalisation and distance education: a Hong Kong case study     

Maurice Craft  Ronnie Carr  Yvonne Fung 《International Journal of Educational Development》1998,18(6):467-472

The accelerating globalisation of world economic relations has been paralleled by a progressive internationalisation of higher education, including the use of distance education. But the modification of distance education materials and the provision of local tutorial support are only rarely undertaken, despite the fact that in social science and the humanities such materials are culturally saturated. This Hong Kong case study in teacher education examines the issues, describes the opportunities and difficulties involved, and argues that cultural adaptation merits a higher priority than at present.  相似文献   

Children can represent complex social status hierarchies: Evidence from Indonesia     

Jamie Amemiya  Kiara Widjanarko  Irene Chung  Lin Bian  Gail D. Heyman 《Child development》2023,94(6):1730-1744

Children's ethnicity-status associations are often studied in societies where one ethnic group possesses status across multiple dimensions, such as political influence and wealth. This study examined children's (6–12 years) and adults' representations of more complex hierarchies in Indonesia (N = 341; 38% Native Indonesian, 33% Chinese Indonesian, and 27% other ethnicities; 55% female, 36% male; 2021–2022), a society where ethnic groups hold distinct forms of status (on average, Native Indonesians have political influence; Chinese Indonesians have wealth). By 6.5 years, children associated Native Indonesians with political influence and Chinese Indonesians with wealth. Intersectional analyses indicated that ethnicity-status associations were stronger for male than female targets. Children of all ethnicities preferred Chinese Indonesians and preferences were predicted by wealth judgments.  相似文献