Eliciting and mapping tacit knowledge on teamwork success of Six Sigma teams     

Tracy X P?ZouEmail author  W B?Lee 《知识管理研究与实践》2016,14(3):246-255

This study aims to elicit and map tacit knowledge on teamwork success as a lens to examine variations in team performance. A new approach based on narrative simulations and the traditional similarity ratings were adopted with Six Sigma teams in an international manufacturing company. Convergence in the knowledge maps among team members and that between teams and the management of the company have been examined. Both approaches revealed differences in high performance teams and average teams. The narrative simulations elicited richer knowledge, provided a second layer with contexts to a better understanding of team knowledge, and generated more actionable suggestions for team development. Misconceptions in some Six Sigma teams were also identified, which provide insights for team training and development. The study demonstrates the application of narratives and sensemaking theories to the elicitation of team knowledge in rich contexts and multiple layers.  相似文献   

The learning of response patterns in choice situations     

Armando Machado  Richard Keen 《Learning & behavior》1999,27(3):251-271

This study presents a theory by which to understand how pigeons learn response patterns in simple choice situations. The theory assumes that, in a choice situation, patterns of responses compete for the final common path; that the competition is governed by two variables, the overall reinforcement probability obtained by emitting the patterns,T, and the differences in reinforcement probabilities among the patterns,D; and that the ratioD/T determines the final strength of specific response patterns. To test these predictions, three experiments were run in which pigeons were more likely to receive food when they pecked the momentarily least-preferred of three response keys. On the basis of previous research, it was predicted that the birds would be indifferent among the keys (molar aspect) and would also acquire a response pattern that consisted of pecking each key once during three consecutive trials (molecular aspect). The present theory went further and predicted that the strength of that pattern would increase with the ratioD/T. In the first two experiments,D was manipulated whileT remained constant, and in the third,T was manipulated whileD remained constant. The results agreed with the theory, for the strength of the response pattern increased withD and decreased withT, whereas overall choice proportions were always close to the matching equilibrium.  相似文献   

Optofluidic planar reactors for photocatalytic water treatment using solar energy     

Lei L  Wang N  Zhang XM  Tai Q  Tsai DP  Chan HL 《Biomicrofluidics》2010,4(4):43004

Optofluidics may hold the key to greater success of photocatalytic water treatment. This is evidenced by our findings in this paper that the planar microfluidic reactor can overcome the limitations of mass transfer and photon transfer in the previous photocatalytic reactors and improve the photoreaction efficiency by more than 100 times. The microreactor has a planar chamber (5 cm×1.8 cm×100 μm) enclosed by two TiO(2)-coated glass slides as the top cover and bottom substrate and a microstructured UV-cured NOA81 layer as the sealant and flow input∕output. In experiment, the microreactor achieves 30% degradation of 3 ml 3×10(-5)M methylene blue within 5 min and shows a reaction rate constant two orders higher than the bulk reactor. Under optimized conditions, a reaction rate of 8% s(-1) is achieved under solar irradiation. The average apparent quantum efficiency is found to be only 0.25%, but the effective apparent quantum efficiency reaches as high as 25%. Optofluidic reactors inherit the merits of microfluidics, such as large surface∕volume ratio, easy flow control, and rapid fabrication and offer a promising prospect for large-volume photocatalytic water treatment.  相似文献   

Necessary Educational Reform for the 2lst Century: The Future of Public Schools in our Democracy     

Armando Laguardia  Arthur Pearl 《The Urban Review》2009,41(4):352-368

We offer a theoretical and ecological argument for the preparation of citizens in U.S. public schools. This democratic education draws legitimacy from the concern of the nations founders for a populace educated to govern itself. We also emphasize the need for new democratic skills and knowledge in the face of today’s challenges, and our responsibility to prepare the young for the 21st century. A critique of the current school reform movement is provided because of its undemocratic nature. We issue a call for the transformation to democratic schools. We specifically argue that current efforts at reform are maintaining historical inequities, while also depriving those that enjoy social and economic advantages of the education needed to meet the challenges of a rapidly changing world. The democratic education proposed is based on three goals: citizenship preparation, inclusion, and an optimum learning environment. Seven well established principles of democracy and their relationship to schooling are presented. These include; the nature of authority, inclusiveness, equal availability of the understanding required for deliberating the most serious challenges to democracy and livability, equal access to centers of political decision-making, guaranteed inalienable rights, equality, and universal access to an optimum learning environment. We offer a fundamentally different approach to educational reform: calling for a reassessment of the role of public schools in a democracy that recognizes the importance of citizenship preparation, and a “bottom up” reform model that starts in the classroom and can be implemented by individual teachers.  相似文献   

Concept Mapping Assessment of Media Assisted Learning in Interdisciplinary Science Education     

Steffen Schaal  Franz X. Bogner  Raimund Girwidz 《Research in Science Education》2010,40(3):339-352

Acquisition of conceptual knowledge is a central aim in science education. In this study we monitored an interdisciplinary hypermedia assisted learning unit on hibernation and thermodynamics based on cooperative learning. We used concept mapping for the assessment, applying a pre-test/post-test design. In our study, 106 9th graders cooperated by working in pairs (n = 53) for six lessons. As an interdisciplinary learning activity in such complex knowledge domains has to combine many different aspects, we focused on long-term knowledge. Learners working cooperatively in dyads constructed computer-supported concept maps which were analysed by specific software. The data analysis encompassed structural aspects of the knowledge corresponding to a target reference map. After the learning unit, the results showed the acquisition of higher-order domain-specific knowledge structures which indicates successful interdisciplinary learning through the hypermedia learning environment. The benefit of using a computer-assisted concept mapping assessment for research in science education, and in science classrooms is considered.  相似文献   

Implementation of concept mapping to novices: reasons for errors,a matter of technique or content?     

Cathérine Conradty  Franz X. Bogner 《Educational studies》2010,36(1):47-58

Concept mapping is discussed as a means to promote meaningful learning and in particular progress in reading comprehension skills. Its increasing implementation necessitates the acquisition of adequate knowledge about frequent errors in order to make available an effective introduction to the new learning method. To analyse causes of errors, 283 A‐level sixth graders produced concept maps about two differently complex subject matter lessons, we implemented in a pre‐lesson. We defined six types of errors and analysed the distribution and contingency tables in both subject matters. Students in general produced more complex concept maps in the context of the easier subject matter (A) than that of the difficult content (B). Whereas in the former errors simply indicated knowledge gaps, in the latter they often reflected technical misconceptions. The occurrence of a content‐dependent technical error in (B) pointed to a cognitive overload, since the more difficult content is hypothesised to cause higher intrinsic load. From this following, concept mapping could provoke an instructional enrichment by additionally revealing specific knowledge gaps.  相似文献   

Discrete-time stochastic impulsive BAM neural networks with leakage and mixed time delays: An exponential stability problem     

C. Sowmiya  R. Raja  Jinde Cao  X. Li  G. Rajchakit 《Journal of The Franklin Institute》2018,355(10):4404-4435

In this paper, the stability analysis of impulsive discrete-time stochastic BAM neural networks with leakage and mixed time delays is investigated via some novel Lyapunov–Krasoviskii functional terms and effective techniques. For the target model, stochastic disturbances are described by Brownian motion. Then the result is further extended to address the problem of robust stability of uncertain discrete-time BAM neural networks. The conditions obtained here are expressed in terms of Linear Matrix Inequalities (LMIs), which can be easily checked by MATLAB LMI control toolbox. Finally, few numerical examples are presented to substantiate the effectiveness of the derived LMI-based stability conditions.  相似文献   

Educational impact on the relationship of environmental knowledge and attitudes     

A. K. Liefländer  F. X. Bogner 《Environmental Education Research》2018,24(4):611-624

This study examines the relationships between the environmental attitudes and environmental knowledge of schoolchildren within the framework of an environmental intervention. We employed questions from the 2-MEV model to monitor students’ environmental attitudes in terms of the model factors Preservation and Utilisation while concurrently monitoring three environmental knowledge dimensions (system, action-related and effectiveness knowledge) at three different test times during the course of a four-day field centre programme for fourth-graders (N = 133, M_age = 9.8 years). Probably due to measurement constraints (e.g. a ceiling effect, social desirability), we found no correlation between environmental knowledge and the attitude Preservation at all test times. The attitude Utilisation correlated negatively with all environmental knowledge dimensions, indicating that students who score higher on Utilisation are more likely, for example, to have and gain more system knowledge through programme participation than the other students or vice versa, as a causal relationship cannot be derived from our analyses: system knowledge may also influence Utilisation. In other words, children who refrain from (ab)using nature also seem to put more effort into improving their environmental knowledge and/or children who engage in learning about the environment will become less exploitative towards the environment.  相似文献   

A fluorescence based method for the quantification of surface functional groups in closed micro- and nanofluidic channels     

Yu Wang  Rachel D. Lowe  Yara X. Mejia  Holger Feindt  Siegfried Steltenkamp  Thomas P. Burg 《Biomicrofluidics》2013,7(2)

Surface analysis is critical for the validation of microfluidic surface modifications for biology, chemistry, and physics applications. However, until now quantitative analytical methods have mostly been focused on open surfaces. Here, we present a new fluorescence imaging method to directly measure the surface coverage of functional groups inside assembled microchannels over a wide dynamic range. A key advance of our work is the elimination of self-quenching to obtain a linear signal even with a high density of functional groups. This method is applied to image the density and monitor the stability of vapor deposited silane layers in bonded silicon/glass micro- and nanochannels.  相似文献   

基于Proteus软件的单片机仿真实例     

刘孝赵  吴振磊  柳承钢 《科技广场》2013,(5):140-143

本文以AT89C51单片机显示汉字点阵系统为例,介绍了仿真软件Proteus的基本功能和特点,研究如何使用仿真软件进行仿真,以及和Keil软件联合仿真的方法,对学生学习Proteus仿真软件具有一定的指导意义,而且提高开发效率,降低开发成本,缩短开发周期。  相似文献