Problems and possible solutions     

Hubert Unterbrunner 《Prospects》1974,4(1):100-104

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TournaRank: When retrieval becomes document competition     

Gilles Hubert  Yoann Pitarch  Karen Pinel-Sauvagnat  Ronan Tournier  Léa Laporte 《Information processing & management》2018,54(2):252-272

Numerous feature-based models have been recently proposed by the information retrieval community. The capability of features to express different relevance facets (query- or document-dependent) can explain such a success story. Such models are most of the time supervised, thus requiring a learning phase. To leverage the advantages of feature-based representations of documents, we propose TournaRank, an unsupervised approach inspired by real-life game and sport competition principles. Documents compete against each other in tournaments using features as evidences of relevance. Tournaments are modeled as a sequence of matches, which involve pairs of documents playing in turn their features. Once a tournament is ended, documents are ranked according to their number of won matches during the tournament. This principle is generic since it can be applied to any collection type. It also provides great flexibility since different alternatives can be considered by changing the tournament type, the match rules, the feature set, or the strategies adopted by documents during matches. TournaRank was experimented on several collections to evaluate our model in different contexts and to compare it with related approaches such as Learning To Rank and fusion ones: the TREC Robust2004 collection for homogeneous documents, the TREC Web2014 (ClueWeb12) collection for heterogeneous web documents, and the LETOR3.0 collection for comparison with supervised feature-based models.  相似文献   

Disciplinary traditions and the dissemination of knowledge. An international comparison of publication patterns in journals of education     

Hubert Ertl  Klaus Zierer  David Phillips  Rudolf Tippelt 《牛津教育评论》2013,39(1):64-88

This paper presents findings from two studies of publication patterns in leading English, German, European and US journals of education. The studies were funded by the German Research Association and conducted by an international team of researchers. All papers published in 14 selected journals between 2001 and 2010 were analysed in terms of their author profile, their methodological approach and their thematic focus. The analyses resulted in publication patterns for the selected journals and at an aggregated level for the four geographic areas in which journals are published, highlighting many similarities, but also distinct differences. As far as the differences are concerned, the lower share of female authors and the relative low proportion of papers drawing on empirical research in German journals are noteworthy. For US journals, the comparatively low importance of papers drawing on the international research discourse seems to be particularly important. Based on an analysis of related studies in this field the paper demonstrates a degree of alignment of publication patterns with disciplinary traditions and formation processes in the field of education. However, the trend analysis provided also shows that some of the traditional boundaries of education as an academic discipline are in a state of flux.  相似文献   

Effect of physiological harvest stages on the composition of bioactive compounds in Cavendish bananas   总被引：1，自引：0，他引：1  

Christelle Bruno Bonnet  Olivier Hubert  Didier Mbeguie-A-Mbeguie  Dominique Pallet  Abel Hiol  Max Reynes  Patrick Poucheret 《Journal of Zhejiang University. Science. B》2013,14(4):270-278

The combined influence of maturation, ripening, and climate on the profile of bioactive compounds was studied in banana (Musa acuminata, AAA, Cavendish, cv. Grande Naine). Their bioactive compounds were determined by the Folin-Ciocalteu assay and high-performance thin layer chromatographic (HPTLC) method. The polyphenol content of bananas harvested after 400 degree days remained unchanged during ripening, while bananas harvested after 600 and 900 degree days exhibited a significant polyphenol increase. Although dopamine was the polyphenol with the highest concentration in banana peels during the green developmental stage and ripening, its kinetics differed from the total polyphenol profile. Our results showed that this matrix of choice (maturation, ripening, and climate) may allow selection of the banana (M. acuminata, AAA, Cavendish, cv. Grande Naine) status that will produce optimal concentrations of identified compounds with human health relevance.  相似文献   

Epistemic and social scripts in computer–supported collaborative learning     

Armin?WeinbergerEmail author  Bernhard?Ertl  Frank?Fischer  Heinz?Mandl 《Instructional Science》2005,33(1):1-30

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职业教育和培训与创新     

Hubert Ertl　Peter Sloane 《科研管理》2004,25(Z1):93-105

本文主要论述了职业教育和培训与创新过程的关系,认为创新需与教育结合,而教育本身也在经理创新的过程,指出了导致后现代科学现代化压力的发展趋势及其对教育和培训体系的挑战.针对这种现状,文章重点考察了德国职业教育和培训体系,分析了德国体系的特点和结构以及近三十年来的主要危机与改革的措施.文章指出每次危机的发生都带动了创新和改革的发展,特别介绍了今年来最重要的改革发展步骤,即所谓的"实地学习概念",文中详细介绍了教学模块创新的基本思想和原则.  相似文献   

Triggered lightning in France and New Mexico     

Pierre Hubert 《Endeavour》1984,8(2):85-89

The possibility of triggering lightning by a rocket carrying a thin wire was demonstrated on a ship by M. M. Newman in 1965. Since 1973, this technique has been developed in France for operation above land. The same equipment was used successfully in New Mexico in 1981 and 1982. Triggered lightning is very attractive for many studies on lightning physics and for testing various kinds of equipment and protection devices. This explains the initiation of similar programmes in several other places.  相似文献   

Validity of student evaluation of instruction     

Hubert M. F. De Neve  Piet J. Janssen 《Higher Education》1982,11(5):543-552

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Undergraduate teaching of ideal and real fluid flows: the value of real-world experimental projects     

Tom E. Baldock  Hubert Chanson 《European Journal of Engineering Education》2006,31(6):729-739

This paper describes the pedagogical impact of real-world experimental projects undertaken as part of an advanced undergraduate fluid mechanics subject at an Australian university. The projects have been organized to complement traditional lectures and introduce students to the challenges of professional design, physical modelling, data collection and analysis. An overview of two projects is presented: wind tunnel testing of buildings and wave loading on piles. Both studies are undertaken as group work within the undergraduate subject. The pedagogy of the projects is discussed in terms of the classical educational psychology literature concerning project-based learning, collaborative and guided learning and reflection. In terms of learning outcomes, the primary aim is to enable students to deliver a professional report as the final product, where physical model data are compared to ideal-fluid flow calculations and real-fluid flow analyses. Thus the students are exposed to a professional design approach involving a high level of expertise in fluid mechanics, with sufficient academic guidance to achieve carefully defined learning goals, while retaining sufficient flexibility for students to construct their own learning goals. The overall pedagogy is a blend of problem-based and project-based learning, which reflects academic research and professional practice. The assessment is a mix of peer-assessed oral presentations and written reports that aims to maximize student reflection and development. Student feedback indicated a strong motivation for courses that include a well-designed project component.  相似文献   

The Sunday‐School Hymn Tune     

Charles Hubert Farnsworth 《Religious education (Chicago, Ill.)》2013,108(4):129-134

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