Focused retrieval and result aggregation with political data   总被引：1，自引：0，他引：1  

Rianne Kaptein  Maarten Marx 《Information Retrieval》2010,13(5):412-433

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Realizing joined-up government — Dynamic capabilities and stage models for transformation     

Bram Klievink  Marijn Janssen 《Government Information Quarterly》2009

Joining up remains a high priority on the e-government agenda and requires extensive transformation. Stage models are predictable patterns which exist in the growth of organizations and unfold as discrete time periods that result in discontinuity and can help e-government development towards joined-up government. Although stage models may be conceptually appealing, these models are often not empirically validated, do not transcend the level of individual organizations, and provide little practical support to policymakers. Furthermore, they do not include the dynamic capabilities needed by organizations to transform from one stage to the next stage.  相似文献   

Simulation and animation for adopting shared services: Evaluating and comparing alternative arrangements     

Marijn Janssen  Anton Joha  Arre Zuurmond 《Government Information Quarterly》2009

Although shared service organizations have the potential to improve government operations, the adoption of the organizational arrangements involved has been limited. Their impact may not be clear in advance and stakeholders may have conceptions about shared service arrangements. As such, there is a need for support for the adoption of shared services.  相似文献   

Automatic versus manual indexing     

W.A. van der Meulen  P.J.F.C. Janssen 《Information processing & management》1977,13(1):13-21

A comparative evaluation has been carried out on the Philips “DIRECT” and the British “INSPEC” retrieval system. DIRECT is based on automatic indexing whereas INSPEC uses manual subject indexing.Two queries were submitted to both systems, using the same data base. The results are expressed in terms of recall and precision. Both recall and precision of INSPEC were found to be higher than those of DIRECT by 20%. It is concluded that this is mainly a result of the query formulation. The effectiveness obtained with automatic indexing of documents is equivalent to that of the manual procedure.  相似文献   

Erratum to: Higher Education,Volume 70, Issue (4 & 6)     

Yoka Janssen 《Higher Education》2017,73(4):613-613

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Evaluation of Actical equations and thresholds to predict physical activity intensity in young children     

Xanne Janssen  Dylan Cliff  John Reilly  Trina Hinkley  Rachel Jones  Marijka Batterham 《Journal of sports sciences》2015,33(5):498-506

This study examined the validity of current Actical activity energy expenditure (AEE) equations and intensity cut-points in preschoolers using AEE and direct observation as criterion measures. Forty 4–6-year-olds (5.3 ± 1.0 years) completed a ~150-min room calorimeter protocol involving age-appropriate sedentary behaviours (SBs), light intensity physical activities (LPAs) and moderate-to-vigorous intensity physical activities (MVPAs). AEE and/or physical activity intensity were calculated using Actical equations and cut-points by Adolph, Evenson, Pfeiffer and Puyau. Predictive validity was examined using paired sample t-tests. Classification accuracy was evaluated using weighted kappas, sensitivity, specificity and area under the receiver operating characteristic curve. The Pfeiffer equation significantly overestimated AEE during SB and underestimated AEE during LPA (P < 0.0125 for both). There was no significant difference between measured and predicted AEEs during MVPA. The Adolph cut-point showed significantly higher accuracy for classifying SB, LPA and MVPA than all others. The available Actical equation does not provide accurate estimates of AEE across all intensities in preschoolers. However, the Pfeiffer equation performed reasonably well for MVPA. Using cut-points of ≤6 counts · 15 s^?1, 7–286 counts · 15 s^?1 and ≥ 287 counts · 15 s^?1 when classifying SB, LPA and MVPA, respectively, is recommended.  相似文献   

Digital Learning Material for Model Building in Molecular Biology     

Tinri?Aegerter-Wilmsen  Fred?Janssen  Rob?Hartog  Ton?BisselingEmail author 《Journal of Science Education and Technology》2005,14(1):123-134

Building models to describe processes forms an essential part of molecular biology research. However, in molecular biology curricula little attention is generally being paid to the development of this skill. In order to provide students the opportunity to improve their model building skills, we decided to develop a number of digital cases about developmental biology. In these cases the students are guided to build a model according to a method that is based on expert analysis and historical data; they first build a simplified model based on the wild-type only and then they extend this model step by step based on experimental results. After each extension, the biological implications of the extension are evaluated. The first case was evaluated three times during a regular course at Wageningen University, The Netherlands and once at the University of Zurich, Switzerland. The analysis of audiotapes revealed that students did indeed engage in the reasoning processes, which are typical for model building. Furthermore, exam results seem to suggest that working with the case indeed facilitates model building in analogical situations and the students judged working with the case positively.  相似文献   

Flexible authoring and delivery of online courses using IMS Learning Design     

Henry Hermans  José Janssen  Rob Koper 《Interactive Learning Environments》2016,24(6):1265-1279

Since the publication of the IMS Learning Design (IMS LD) specification in 2003, many initiatives have been undertaken to build authoring tools that are simple enough to be used by non-technical instructors and teachers. IMS LD's technical complexity is believed to be a major burden for the adoption of the specification. We have developed a new approach for course authoring and delivery that hides most of the complexities and is powerful enough to create highly flexible online courses. Key aspects in this approach are (1) integration of IMS LD authoring and delivery tools in order to enable teachers to adapt courses in runtime and (2) the use of templates to standardize aspects of the LD. This article reports on the research and development of this approach, as well as a first implementation by the Open University of the Netherlands as part of an integrated e-learning system.  相似文献   

Pedagogical content knowledge: an integrative component within the knowledge base for teaching.     

Jan H. Van Driel  William R. Veal  Fred J. J. M. Janssen 《Teaching and Teacher Education》2001,17(8)

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Motivation-Achievement Cycles in Learning: a Literature Review and Research Agenda     

Vu  TuongVan  Magis-Weinberg  Luc&#;a  Jansen  Brenda R. J.  van Atteveldt  Nienke  Janssen  Tieme W. P.  Lee  Nikki C.  van der Maas  Han L. J.  Raijmakers  Maartje E. J.  Sachisthal  Maien S. M.  Meeter  Martijn 《Educational Psychology Review》2022,34(1):39-71

Educational Psychology Review - The question of how learners’ motivation influences their academic achievement and vice versa has been the subject of intensive research due to its theoretical...  相似文献