Editorial     

J��r?me Rossier 《International Journal for Educational and Vocational Guidance》2011,11(1):1-2

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BOOKS THAT MEDICAL LIBRARIANS SHOULD KNOW ABOUT Printing Types,Their History,Form and Use     

Ruhräh J 《Bulletin of the Medical Library Association》1924,13(3-4):37-38

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Experimental verification of Faradaic charging in ac electrokinetics     

Wee Yang Ng  Yee Cheong Lam    Isabel Rodr��guez 《Biomicrofluidics》2009,3(2)

This paper investigates the phenomenon of Faradaic charging in ac electrokinetics. Faradaic reactions were suggested as a key effect responsible for the reversal of pumping direction in ac micropumps. However, this hypothesis has yet to be proven convincingly and directly. Here we present an ion detection strategy to determine the production of ions through Faradaic hydrolytic reactions originating from direct application of voltage to electrolytic solutions during ac electrokinetics. Experiments were performed with symmetrical planar electrodes aligned along a microfluidic channel. Fluorescein, a pH-dependent dye, was employed as the pH indicator for the detection of ion production. Images were captured for analysis at various voltage levels. From analyzing the fluorescence intensity and its distribution, it can be concluded that the production of ions from hydrolytic reactions takes place and increases with the ac voltage. The coefficient of deviation indicates a significant enhancement at ac voltage above 11 V_pp. Lastly, we demonstrate a strategy using dc-biased ac electrokinetics to achieve controllability in direction and magnitude of the net fluid flow in pumping application.  相似文献   

Reply     

Wiel?VeugelersEmail author 《Journal of Educational Change》2005,6(3):284-291

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Renaissance Man.     

g. h. r.  parkinson 《Philosophical Books》1981,22(2):109-111

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Analysis of Network Traffic with Extreme Value Theory   总被引：1，自引：0，他引：1  

舒炎泰  汪广洪  高德云  刘嘉焜  王旭 《天津大学学报(英文版)》2003,9(2)

Withincreasingdemandofwidebandwidthservicesuchasmultimediaandvideo ,itisverydesirabletore searchondifferenttransporttechniquesforhigh speednetworks.Congestioncontrol,bandwidthassignment ,networkmanagementand performanceevaluationaresomeexamplesthathavebeenresearchedwidely .Asthefoundationoftheseresearchfields ,itisthemostessentialtobuildamodelthatcanaccuratelycharacterizerealnet worktraffic .Hence ,itisalsonecessarytounderstandandanalyzestatisticalpropertiesofthenetworktrafficbecauseitcanindic…  相似文献   

Working toward integrated practice: Understanding the interaction among formative assessment strategies     

Christine J. Lyon  Leslie Nabors Oláh  E. Caroline Wylie 《The Journal of educational research》2019,112(3):301-314

The purpose of this study was to directly observe and investigate the factors that support or hinder the implementation of an integrated approach to formative assessment and to understand how the implementation of formative assessment strategies interact. The authors present findings from a collective case study that included the observation of six teachers (three mathematics and three English language arts) who were purposefully sampled from a large, public, suburban high school in the northeast United States. The analysis of the case studies resulted in the identification of different patterns in teachers’ formative assessment practice. These patterns illustrate how the complex interaction between formative assessment practices can either support or hinder the implementation of an integrated approach to formative assessment and suggests classroom observations as a potential mechanism for identifying challenges and informing just-in-time professional development.  相似文献   

Everlasting Friends and Enemies? Finnish University Personnel’s Perceptions of Internal Quality Assurance in 2010 and 2017     

Jasmin Overberg  Timo Ala-Vähälä 《Scandinavian Journal of Educational Research》2020,64(5):744-767

ABSTRACT

Even though quality assurance has played a role in European higher education for decades by now, it is still a topic of great discord. While several studies have focused on the initiation phase of quality assurance, little attention has been paid to the question on how attitudes towards quality assurance in higher education change over time. This study compares the attitudes of Finnish university personnel using data from 2010 and 2017. The results show that personnel experience quality assurance as slightly better in 2017 than in 2010, while differences concerning gender, personnel group and type of university persist. The findings underline the importance of implementing quality assurance in a stakeholder-specific way.  相似文献   

Reception of the quality assurance commitments of the Bologna process in Finnish higher education institutions     

Timo Ala-Vähälä 《Quality in Higher Education》2016,22(2):103-116

This article analyses Finnish higher education institutions’ reception of the implementation of the new quality assurance systems that governments participating in the Bologna Process have committed to establishing in the Berlin Communiqué of 2003. The data were collected using a web survey and the respondents were classified with a cluster analysis. The reception was more positive in the polytechnics than in the research universities and women were more positive than men. People working in managerial positions were most positive about, and committed to, quality assurance. Most critical were young researchers in research universities working in temporary jobs. Some opinions were so strongly shared that respondents with short work experience expressed their opinions, even though they could not have personal experience of the topic in question. For some topics, respondents without personal experience, but having a critical attitude, tended to give their opinion whereas those with neutral attitude abstained from commenting.  相似文献   

Teachers’ Professional Identity Negotiations in Two Different Work Organisations   总被引：1，自引：0，他引：1  

Katja Vähäsantanen  Päivi Hökkä  Anneli Eteläpelto  Helena Rasku-Puttonen  Karen Littleton 《Vocations and Learning》2008,1(2):131-148

Recent studies have described professional identity as the interplay between individual agency and social context. However, we need to understand how these are intertwined in different kinds of work settings. This paper focuses on teachers’ professional identity negotiations as involving the work organisation, the professional community and individual agency. The data were gathered from two work organisations representing different management cultures and sources of control over teachers’ work. Open-ended narrative interviews were used, focusing on teachers’ own experiences and perceptions. A data-driven qualitative analysis was applied. Our findings indicated that different work organisations provided differing resources for teachers’ professional identity negotiations. Teachers were more committed to their work organisation if they had enough agency, if they had opportunities to practise their own orientations towards the profession, and if major changes were not imposed on their working practices from outside.  相似文献