Statistical Models for Monolingual and Bilingual Information Retrieval

This work reviews information retrieval systems developed at ITC-irst which were evaluated through several tracks of CLEF, during the last three years. The presentation tries to follow the progress made over time in developing new statistical models first for monolingual information retrieval, then for cross-language information retrieval. Besides describing the underlying theory, performance of monolingual and bilingual information retrieval models are reported, respectively, on Italian monolingual tracks and Italian-English bilingual tracks of CLEF. Monolingual systems by ITC-irst performed consistently well in all the official evaluations, while the bilingual system ranked in CLEF 2002 just behind competitors using commercial machine translation engines. However, by experimentally comparing our statistical topic translation model against a state-of-the-art commercial system, no statistically significant difference in retrieval performance could be measured on a larger set of queries.     

A case study of the development of WebPA: An online peer-moderated marking tool

Peer moderation of group work in higher education is rapidly advancing through the use of technological developments and is increasingly being informed by pedagogical research. The highly successful WebPA online assessment system has gone through a number of development phases over its 15-year history and has now evolved into a relatively mature and flexible tool for facilitating group work. This paper presents a case study of the approaches that have been used in the system's development from the technical perspective, and describes how the scope of the project has massively expanded and that the development has been continually backed by a sound and wide-ranging pedagogy. The benefits of using the online system are shown to be underpinned throughout by examples of good practice in the supervision of academic group work. A critical evaluation of the tool and surrounding pedagogical practices highlight future areas for technical expansion.     

我们时代的教育

教育是当今世界的一个主要问题。尽管许多问题最先是从西方国家表现出来的,不过现在几乎已是人类普遍的问题:为什么孩子去倾听如此困难,--特别是男孩们?为什么许多孩子被赶出学校?为什么青少年自杀和吸毒率如此之高?是什么导致了学校暴力?我们能对上述问题一言蔽之:教育是否与我们时代的真正需求相匹配?比起以前,我们更需要发现一种新的与自     

‘Defnyddiwch y Gymraeg’1: community sport as a vehicle for encouraging the use of the Welsh language

Abstract

Despite cultural and statutory changes, including significant investment in Welsh medium education, latest census data show a drop in the percentage of Welsh speakers. Moreover there is a concern that many of those who are able to speak Welsh are not using it – the language is not ‘alive’. The Welsh Language Commissioner has identified sport as a space where Welsh can be used, encouraged and promoted. The aim of this study was to investigate whether community sport clubs can provide a space to encourage the use of Welsh. Using qualitative methods we found that strategies to promote Welsh in sports clubs are potentially divisive. The dominant and ‘operational’ language of many community sport clubs is English. Increasing the use of Welsh in these clubs risks excluding non-Welsh speakers, but ignoring the language denies Welsh speakers the opportunity to participate in Welsh.     

Playing to Draw [for Design]

There is a disconnect for a number of applied design students who utilise drawing from online, published and photographic sources, in the development of design collections. In practice they are engaged with a subject that physically demands the direct use of hands in the making of artefacts, particularly within textile fields. Drawing is at the core of the development of ideas but it is often seen as being different or awkward and can cause anxiety amongst students who may be more focused on the end [designed] result. This article reflects upon the teaching of a drawing class with year two undergraduates on a textiles degree course at a UK university. Rather than relying on that which is readily available (from museums, online content, galleries, archives or trend forecasting sites), students make their own 2D and 3D primary sources from which they develop drawn proposals for textile and surface samples. Does this approach allow fresh visuals, new languages and translations for design to emerge? Will it provide a further level of engagement for those students who already love drawing as well as those who don't (yet)? Data has been drawn from key texts, questionnaires, journals and observations of the work carried out by participating students.     

Practice, instruction and skill acquisition in soccer: challenging tradition

The acquisition of soccer skills is fundamental to our enjoyment of the game and is essential to the attainment of expertise. Players spend most of their time in practice with the intention of improving technical skills. However, there is a lack of scientific research relating to the effective acquisition of soccer skills, especially when compared with the extensive research base on physiological aspects of performance. Current coaching practice is therefore based on tradition, intuition and emulation rather than empirical evidence. The aim of this review is to question some of the popular beliefs that guide current practice and instruction in soccer. Empirical evidence is presented to dispel many of these beliefs as myths, thereby challenging coaches to self-reflect and critically evaluate contemporary doctrine. The review should inform sports scientists and practitioners as to the important role that those interested in skill acquisition can play in enhancing performance at all levels of the game.     

Modelling coaching practice: the role of instruction and demonstration

In this paper, we review the empirical literature pertaining to the effectiveness of instructions and movement demonstrations. Initially, we examine existing theories and approaches that try to explain the process of skill acquisition so as to determine implications of these theories for instructional provision. This is followed by an evaluation of studies in the motor learning literature in which pre-practice information has been manipulated. Explicit learning strategies are contrasted to implicit and discovery learning methods, and current explanations for instructional effects are discussed in terms of such mechanisms as effects-related attentional focus and movement variability. In the final sections, we review data from our own laboratory where pre-practice information has been manipulated during the learning of a novel bimanual coordination task. From these studies, proposals are made to try and explain how pre-practice information works to effect the process of skill acquisition, including the selection and execution of a response and the processing of associated feedback. An important role is given to the existing skills of the learner in understanding the instructions and performing the desired movement. Finally, we suggest some practical implications of this empirical evidence for the teaching of motor skills.