Editorial     

Edward F. Reidy  Jr.  Walter M. Haney 《Educational Measurement》1986,5(4):4-4

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Editorial. Keeping the politics of liberation alive     

William C. Kyle Jr. 《科学教学研究杂志》1995,32(1):1-2

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A collaborative filtering similarity measure based on singularities     

Jesús Bobadilla  Fernando OrtegaAntonio Hernando 《Information processing & management》2012

Recommender systems play an important role in reducing the negative impact of information overload on those websites where users have the possibility of voting for their preferences on items. The most normal technique for dealing with the recommendation mechanism is to use collaborative filtering, in which it is essential to discover the most similar users to whom you desire to make recommendations. The hypothesis of this paper is that the results obtained by applying traditional similarities measures can be improved by taking contextual information, drawn from the entire body of users, and using it to calculate the singularity which exists, for each item, in the votes cast by each pair of users that you wish to compare. As such, the greater the measure of singularity result between the votes cast by two given users, the greater the impact this will have on the similarity. The results, tested on the Movielens, Netflix and FilmAffinity databases, corroborate the excellent behaviour of the singularity measure proposed.  相似文献   

Raman mapping analysis of pigments from Proas Iluminadas by Quinquela Martín     

Emilia B. Halac  María Reinoso  Marcelo Luda  Fernando Marte 《Journal of Cultural Heritage》2012,13(4):469-473

The painting Proas Iluminadas (Illuminated Bows) by Benito Quinquela Martín is studied by Raman spectroscopy in order to analyse the technique and the pigments employed by the artist: ultramarine blue, carbon black, cadmium-sulphure based compounds for the hue of yellow, orange and red; also zinc white, barium yellow, massicot yellow and viridian were observed. The importance of using different excitation laser lines in the analysis of mixtures of pigments is highlighted. The Raman mapping analysis of cross section samples shows the way the artist composed the ground layer: a lead white stratum over a calcite one. It also allows distinguishing between a mixture of components and strata superposition, both presenting the same appearance under an optical microscope. This paper provides information about the materials and techniques used in a period of Argentine art not studied before from this point of view.  相似文献   

Managing Uncertainty During Collaborative Problem Solving in Elementary School Teams: The Role of Peer Influence in Robotics Engineering Activity     

Michelle E. Jordan  Reuben R. McDaniel Jr. 《学习科学杂志》2013,22(4):490-536

This study investigated how interaction with peers influenced the ways students managed uncertainty during collaborative problem solving in a 5th-grade class. The analysis focused on peer responses to individuals’ attempts to manage uncertainty they experienced while engaged in collaborative efforts to design, build, and program robots and achieve assignment objectives. Patterns of peer response were established through discourse analysis of work sessions for 5 teams engaged in 2 collaborative projects. Three socially supportive peer responses and 2 unsupportive peer responses were identified. Peer interaction was influential because students relied on supportive social response to enact most of their uncertainty management strategies. This study provides a useful theoretical contribution to understanding the roles of peer interaction in collaborative problem solving. Conceptualizing collaborative problem solving as a process of negotiating uncertainties can help instructional designers shape tasks and relational contexts to facilitate learning.  相似文献   

MAGIS: mobile augmented-reality games for instructional support     

Eric Cesar E. Vidal Jr.  Jayzon F. Ty  Nicko R. Caluya  Ma. Mercedes T. Rodrigo 《Interactive Learning Environments》2013,21(7):895-907

ABSTRACT

We present Mobile Augmented-Reality Games for Instructional Support (MAGIS), a framework for the development of mobile augmented-reality (AR) games for education. The framework supports off-the-shelf, state-of-the-art technologies that enable AR tracking and rendering on consumer-level mobile devices, and integrates these technologies with content-generation tools that simplify the development of educational AR games, especially those that extensively use narrative-based game design and player-location tracking such as location-based historical or museum adventure games. We use Igpaw: Intramuros, a proof-of-concept game developed using MAGIS, to help describe the current state of the framework and to show its efficacy for implementing outdoor location-based educational games, and we briefly outline future development plans to improve MAGIS’ AR support (especially those involving indoor scenarios) as well as to improve the instructional design and authoring phases of AR applications written using this framework.  相似文献   

Adolescent Perceptions of Three Important Aspects of School     

Anne F. Geisser  W.C. Wolf Jr. 《Equity & Excellence in Education》2013,46(1-6):215-218

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Multicultural Education for Preservice Teachers     

Roger G. Olstad  Clifford D. Foster  Richard M. Wyman Jr. 《Equity & Excellence in Education》2013,46(1-6):137-139

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THE NEGRO IN AMERICAN HISTORY TEXTBOOKS     

Kenneth M. Stampp  Winthrop D. Jordan  Lawrence W. Levine  Robert L. Middlekauff  Charles G. Sellers  George W. Stocking Jr. 《Equity & Excellence in Education》2013,46(5):9-26

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THE TRACK SYSTEM IN WASHINGTON,D.C.     

Elias Blake Jr. 《Equity & Excellence in Education》2013,46(2):27-35

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