David Gibbon,Zhu Liu: Introduction to video search engines     

Colum Foley 《Information Retrieval》2010,13(4):398-402

  相似文献   

Entity ranking in Wikipedia: utilising categories,links and topic difficulty prediction     

Jovan Pehcevski  James A. Thom  Anne-Marie Vercoustre  Vladimir Naumovski 《Information Retrieval》2010,13(5):568-600

Entity ranking has recently emerged as a research field that aims at retrieving entities as answers to a query. Unlike entity extraction where the goal is to tag names of entities in documents, entity ranking is primarily focused on returning a ranked list of relevant entity names for the query. Many approaches to entity ranking have been proposed, and most of them were evaluated on the INEX Wikipedia test collection. In this paper, we describe a system we developed for ranking Wikipedia entities in answer to a query. The entity ranking approach implemented in our system utilises the known categories, the link structure of Wikipedia, as well as the link co-occurrences with the entity examples (when provided) to retrieve relevant entities as answers to the query. We also extend our entity ranking approach by utilising the knowledge of predicted classes of topic difficulty. To predict the topic difficulty, we generate a classifier that uses features extracted from an INEX topic definition to classify the topic into an experimentally pre-determined class. This knowledge is then utilised to dynamically set the optimal values for the retrieval parameters of our entity ranking system. Our experiments demonstrate that the use of categories and the link structure of Wikipedia can significantly improve entity ranking effectiveness, and that topic difficulty prediction is a promising approach that could also be exploited to further improve the entity ranking performance.  相似文献   

A Look at Global Expansion for e-Books     

Andrew Weinstein 《Publishing Research Quarterly》2010,26(1):11-15

Forecasts indicate a growing demand for digital content around the world. Converting to digital content can open up countless new revenue possibilities. Adding alternate channels may be worth consideration, but what are the options and what does it take to utilize them effectively? This article explores the opportunities that potentially exist for publishers with content that may be digitized and distributed to global markets. A brief review of the current marketplace is also incorporated, including current players and trends. Finally, an analysis of some of the potential issues, challenges and pitfalls is presented in context of delving into a new international digital content distribution strategy.  相似文献   

Learning to rank with (a lot of) word features     

Bing Bai  Jason Weston  David Grangier  Ronan Collobert  Kunihiko Sadamasa  Yanjun Qi  Olivier Chapelle  Kilian Weinberger 《Information Retrieval》2010,13(3):291-314

In this article we present Supervised Semantic Indexing which defines a class of nonlinear (quadratic) models that are discriminatively trained to directly map from the word content in a query-document or document-document pair to a ranking score. Like Latent Semantic Indexing (LSI), our models take account of correlations between words (synonymy, polysemy). However, unlike LSI our models are trained from a supervised signal directly on the ranking task of interest, which we argue is the reason for our superior results. As the query and target texts are modeled separately, our approach is easily generalized to different retrieval tasks, such as cross-language retrieval or online advertising placement. Dealing with models on all pairs of words features is computationally challenging. We propose several improvements to our basic model for addressing this issue, including low rank (but diagonal preserving) representations, correlated feature hashing and sparsification. We provide an empirical study of all these methods on retrieval tasks based on Wikipedia documents as well as an Internet advertisement task. We obtain state-of-the-art performance while providing realistically scalable methods.  相似文献   

Evaluating teaching effectiveness and teaching improvement: A language for institutional policies and academic development practices     

Lynn McAlpine  Ralph Harris 《International Journal for Academic Development》2013,18(1):7-17

Demands for institutional accountability in higher education have been increasing and have led to greater attention to the evaluation of teaching, the assumption being that improved teaching will result in enhanced learning. In our work as academic developers, we are increasingly helping academic managers make explicit teaching policies and practices that seem fair and equitable. To help us in this work, we have developed a framework for evaluating the practice of teaching. What is unique about this framework is the language it provides to differentiate aspects of teaching. For instance, it provides a basis for differentiating and linking criteria to standards, i.e. the level of achievement desired or expected. Standards are critical if the evaluation of teaching is to be seen as fair and equitable, yet they are often unexamined in other representations of the evaluation of teaching. Although the original intent of our efforts was to provide a framework for academic managers, we have come to find it useful in our own work as university teachers and as academic developers. Examples of all three uses are provided in the paper.  相似文献   

Reflections on the First International iPED Conference,Coventry TechnoCentre,UK, 10–11 September 2006     

Virginia King  Lynn Clouder  Mary Deane  Frances Deepwell  Lisa Ganobcsik-Williams 《Teaching in Higher Education》2013,18(3):425-433

Through reflection on the First International iPED Conference 2006, and its overarching theme of ‘Pedagogical Research and Academic Identities’, this paper considers the achievement of the wider aims of the conference, which were to facilitate dialogue between researchers in order to explore the conference themes collaboratively, and to provide networking opportunities which would enable participants to build alliances. The abstracts for all papers mentioned are available via the conference website www.coventry.ac.uk/iped2006.  相似文献   

Peer relations and emotion regulation of children with emotional and behavioural difficulties with and without a developmental disorder     

Sasha Lynn  Stephen Houghton  Vanessa Cobham 《Emotional and Behavioural Difficulties》2013,18(3):297-309

Children with emotional and behavioural difficulties (EBD) and those who also have developmental disorders, such as attention deficit hyperactivity disorder (ADHD) or autism spectrum disorder (ASD), can experience the same adverse consequences in their peer interactions and relationships. This present study compared the emotion regulation and peer relationships of children aged 8–12 years (M = 9.86 years, SD = 1.49) with EBD (N = 33) and children with EBD plus a diagnosed developmental disorder (N = 28). Multivariate analysis of variance (MANOVA) with Bonferroni adjusted alpha levels revealed no significant main effect for emotion regulation according to EBD status. There was, however, a multivariate main effect for sex, with females presenting with higher levels of negative emotional intensity (e.g., frustration, anger, aggression) than males. A second MANOVA revealed no significant main effect for peer relationships according to EBD status and sex. Significant correlations revealed that the EBD-only group experienced greater adverse peer interactions than the EBD-plus-developmental disorder group. These findings are important for educators and researchers involved in the development and evaluation of prevention and intervention programms for children with EBD.  相似文献   

Event-Konzepte     

Ronald Hitzler  Babette Kirchner  Jessica Pahl 《Zeitschrift für Erziehungswissenschaft》2013,16(3):143-158

In view of processes of individualization and pluralization, the requirements for living in modern societies result in significantly increased complexity of social constructions of reality. Especially for individualized juvenile people new forms of communities are a constitutive feature of social lifestyle progression and rearrangement. Within events a specific type of these juvenile communalities emerges. Based on two different cases, a music festival and an improvisational theater performance, this paper emphasizes a crucial similarity of events: the use of (physical) staging as a social mechanism for integration and distinction. The process of ‘eventization’ (i.e., spectacularization) provides a framework for action, in which emotional as well as mental affiliations constitute.  相似文献   

Editorial: Kompetenzmodelle zur Erfassung individueller Lernergebnisse und zur Bilanzierung von Bildungsprozessen     

Detlev Leutner  Eckhard Klieme  Jens Fleischer  Harm Kuper 《Zeitschrift für Erziehungswissenschaft》2013,16(1):1-2

This special issue comprises eleven articles from the DFG priority program “Competence Models for Assessing Individual Learning Outcomes and Evaluating Educational Processes”. The special issue aims at showing the priority program’s present state of discussion concerning essential concepts and questions related to the modeling of competencies. The first article describes the structure and research areas of the program and gives an overview on the current state of research. The short articles two to eleven discuss questions and problems which proved to be of particular importance during the work of the priority program in the last years. These articles constitute the result of a workshop of the participating scientists of the priority program in terms of position papers.  相似文献   

Transferwirkungen künstlerischer Tätigkeiten. Ihre kritische Kommentierung durch eine umfassende Theorie ästhetischer Bildung     

Christian Rittelmeyer 《Zeitschrift für Erziehungswissenschaft》2013,16(3):217-231

Transfer research examines how artistic activities can have an impact outside of the realm of art itself. The article concludes that this research can be carried out in a meaningful way, only within the framework of a comprehensive theory of aesthetic education. This theory would encompass the structural analysis of artistic activity, as well as biographical reports about artistic experiences. The elucidation of the concepts or themes relevant to the theory would include the notion of aesthetic experience, the understanding of immediate, aesthetic experiences, the analysis of artistic processes, and the outcomes of scientifically evaluated applications of aesthetic education.  相似文献