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排序方式: 共有441条查询结果,搜索用时 234 毫秒
121.
Andreas Reinstaller 《Research Policy》2005,34(9):1366-1384
This paper uses the concept of policy entrepreneurship to explain the social processes underlying sustainable technical change in the pulp and paper industry in the 1990s. It presents a detailed case study on the differences in the transition to and diffusion of totally chlorine free (TCF) pulp bleaching methods in Sweden and the USA. This change was sustained in the former, while it was almost absent in the latter. The paper studies the causes for this difference. It looks at the complex coevolution of technology, institutions, and consumer preferences that has taken place in both countries and draws conclusions on how transitions to sustainable paths in production and consumption may be supported by economic and social policy. 相似文献
122.
123.
Andreas Hirschi Damian Läge 《International Journal for Educational and Vocational Guidance》2008,8(2):95-110
A career workshop that applies models of the Cognitive Information Processing Approach (Sampson, Reardon, Peterson, &; Lenz, 2004) and incorporates critical ingredients (Brown and Ryan Krane, 2000) to promote the career choice readiness of young adolescents was developed and evaluated with 334 Swiss students in seventh grade applying a Solomon four group design with a three-month follow-up. Participants significantly increased their performance in terms of career decidedness, career planning, career exploration, and vocational identity. Implications for evaluation research and counselling practice are presented. 相似文献
124.
Anne Gaml-Sørensen Nis Brix Andreas Ernst Lea Lykke Harrits Lunddorf Cecilia Høst Ramlau-Hansen 《Child development》2021,92(4):1494-1508
This cohort study, including 15,810 children born 2000–2003 in Denmark, aimed to investigate the association between father absence in pregnancy or during childhood and pubertal development in girls and boys. The children were followed from 11 years of age and throughout pubertal development. Mean age differences according to exposure groups were estimated for each pubertal marker separately and for a combined pubertal marker. The results suggested that father absence in pregnancy and during childhood was associated with earlier pubertal development in girls, and father absence from late childhood was associated with earlier pubertal development in boys. The paternal investment theory, the psychosocial acceleration theory and the energetics theory were explored, and did not seem to explain the observed associations. 相似文献
125.
Reading and Writing - Morphologically marked case is in Arabic a feature exclusive to the variety of Standard Arabic, with no parallel in the spoken varieties, and it is orthographically marked... 相似文献
126.
Anna Mavroudi Thanasis Hadzilacos Dimitris Kalles Andreas Gregoriades 《Interactive Learning Environments》2016,24(8):1996-2010
This paper discusses a requirements engineering process that exemplifies teacher-led design in the case of an envisioned system for adaptive learning. Such a design poses various challenges and still remains an open research issue in the field of adaptive learning. Starting from a scenario-based elicitation method, the whole process was highly participatory, with requirements validation in iterative cycles. The contribution of the paper is twofold: (a) it exposes the design of an environment which addresses the related challenges mentioned by the participants and the literature and (b) it suggests a methodology of framing key requirements into a set of critical success factors for meeting the end-users’ expectations. The latter could be crucial in cases where the available resources are limited, but the quality of the product must not be sacrificed. 相似文献
127.
Andreas Ryve 《Educational Studies in Mathematics》2004,56(2-3):157-177
Four groups (three engineering students in each group)were videotaped while constructing concept maps in Linear Algebra. There are two aims of this study. The first is to characterize the discourse in the groups by addressing the following research questions: Do the students communicate in an effective way?Do the students' communications contain the elements typical for amathematically productive discourse? The analysis indicates that the communication among the students is effective and contains the elements that are characteristic for a mathematically productive interaction. The two types of methods used to analyze the data were focal and preoccupational analysis. The mathematical content and the coherence of the conversations were examined through focal analysis. The participants' engagement in the discourse was examined by preoccupational analysis, carried out by means of interactive flow chart. The second aim of this study is to evaluate the newly developed methodological framework used to characterize the discourses. The study shows that several aspects of the methodological framework need to be developed. 相似文献
128.
Dynamic adaptation of multimedia content is seen as an important feature of next generation networks and pervasive systems enabling terminals and applications to adapt to changes in e.g. context, access network, and available Quality-of-Service (QoS) due to mobility of users, devices or sessions. We present the architecture of a multimedia stream adaptation service which enables communication between terminals having heterogeneous hardware and software capabilities and served by heterogeneous networks. The service runs on special content adaptation nodes which can be placed at any location within the network. The flexible structure of our architecture allows using a variety of different adaptation engines. A generic transcoding engine is used to change the codec of streams. An MPEG-21 Digital Item Adaptation (DIA) based transformation engine allows adjusting the data rate of scalable media streams. An intelligent decision-taking engine implements adaptive flow control which takes into account current network QoS parameters and congestion information. Measurements demonstrate the quality gains achieved through adaptive congestion control mechanisms under conditions typical for a heterogeneous network. 相似文献
129.
Knowledge Management Research & Practice - Decision makers process and combine manifold types of data, information and knowledge, available in various forms in the organisation. The aim of... 相似文献
130.
Quality Assurance in UK Higher Education: Issues of Trust, Control, Professional Autonomy and Accountability 总被引:5,自引:0,他引:5
Andreas Hoecht 《Higher Education》2006,51(4):541-563
This article explores the issues of trust, control, professional autonomy and accountability in higher education quality assurance
in the UK. The main part of this article is conceptual, but it includes results from semi-structured interviews with academic
staff that were conducted at two “new university” business schools. Both institutions are broadly similar in their key characteristics
and have experienced a transformation to university status in the early 1990s. The article argues that there has been a change
from informal “light-touch” quality control systems based on local practices and a significant amount of trust and professional
autonomy in the early 1990s to a highly prescribed process of audit-based quality control today. The article argues that accountability
and transparency are important principles that academics should wholeheartedly embrace, but that the audit format adopted
in the UK introduces a one-way accountability and provides “rituals of verification” (Power 1997) instead of fostering trust,
has high opportunity costs and may well be detrimental to innovative teaching and learning. 相似文献