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Current Search:
All of 'Information' and 'retrieval' in all fields;
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Displaying Results 226 - 250 of 597 on page 10 of 24
Marked
Mark
Supporting different search strategies in a video query interface
(2000)
Dunlop, Mark D.; McDonald, Kieran
Supporting different search strategies in a video query interface
(2000)
Dunlop, Mark D.; McDonald, Kieran
Abstract:
This paper reports the design and development of the Diceman Query Application. This is the end-user query application for a video indexing and retrieval project based on the Diceman architecture for distributed internet content exchange using MPEG-7 and agent negotiation. The query application was developed to support different search strategies of users accessing large video archives that have been indexed with a complex indexing language. The paper describes the interface, its design, the strategies supported, and initial results from user tests of building complex queries using the query interface (including a discussion of end-users ability to formulate meaningful semantic queries using low-level indexing features). Finally the paper discusses the implications of the interface on the underlying search engine.
http://doras.dcu.ie/362/
Marked
Mark
An empirical study of inter-concept similarities in multimedia ontologies
(2007)
Koskela, Markus; Smeaton, Alan F.
An empirical study of inter-concept similarities in multimedia ontologies
(2007)
Koskela, Markus; Smeaton, Alan F.
Abstract:
Generic concept detection has been a widely studied topic in recent research on multimedia analysis and retrieval, but the issue of how to exploit the structure of a multimedia ontology as well as different inter-concept relations, has not received similar attention. In this paper, we present results from our empirical analysis of different types of similarity among semantic concepts in two multimedia ontologies, LSCOM-Lite and CDVP-206. The results show promise that the proposed methods may be helpful in providing insight into the existing inter-concept relations within an ontology and selecting the most facilitating set of concepts and hierarchical relations. Such an analysis as this can be utilized in various tasks such as building more reliable concept detectors and designing large-scale ontologies.
http://doras.dcu.ie/370/
Marked
Mark
Text based approaches for content-based image retrieval on large image collections
(2005)
Wilkins, Peter; Ferguson, Paul; Smeaton, Alan F.; Gurrin, Cathal
Text based approaches for content-based image retrieval on large image collections
(2005)
Wilkins, Peter; Ferguson, Paul; Smeaton, Alan F.; Gurrin, Cathal
Abstract:
As the growth of digital image collections continues so does the need for efficient content based searching of images capable of providing quality results within a search time that is acceptable to users who have grown used text search engine performance. Some existing techniques, whilst being capable of providing relevant results to a user's query will not scale up to very large image collections, the order of which will be in the millions. In this paper we propose a technique that uses text based IR methods for indexing MPEG- 7 visual features (from the MPEG-7 XM) to perform rapid subset selection within large image collections. Our test collection consists of 750,000 images crawled from the SPIRIT collection (discussed in section 3) and a separate set of 1000 query images also from the SPIRIT collection. An initial experiment is presented to measure the accuracy of the subset generated for each query image by taking the top 100 results of the subset, and comparing those to t...
http://doras.dcu.ie/393/
Marked
Mark
Query independent measures of annotation and annotator impact
(2009)
Lanagan, James; Smeaton, Alan F.
Query independent measures of annotation and annotator impact
(2009)
Lanagan, James; Smeaton, Alan F.
Abstract:
The modern-day web-user plays a far more active role in the creation of content for the web as a whole. In this paper we present Annoby, a free-text annotation system built to give users a more interactive experience of the events of the Rugby World Cup 2007. Annotations can be used for query-independent ranking of both the annotations and the original recorded video footage (or documents) which has been annotated, based on the social interactions of a community of users. We present two algorithms, AuthorRank and MessageRank, designed to take advantage of these interactions so as to provide a means of ranking documents by their social impact.
http://doras.dcu.ie/2399/
Marked
Mark
Utilising contextual memory retrieval cues and the ubiquity of the cell phone to review lifelogged physiological activities
(2009)
Doherty, Aiden R.; Tolle, Kristin M.; Smeaton, Alan F.
Utilising contextual memory retrieval cues and the ubiquity of the cell phone to review lifelogged physiological activities
(2009)
Doherty, Aiden R.; Tolle, Kristin M.; Smeaton, Alan F.
Abstract:
In today's healthcare world where we react to conditions that have already developed, lifelogging technologies may offer a glimpse into a future world of proactive healthcare where symptoms of conditions are detected at much earlier stages. At the end of last year it was estimated that there were 4 billion cell phones in the world, in comparison to just over 1 billon PCs. In this paper we discuss a framework, which leverages the ubiquity of the cell phone, to aggregate data from multiple wearable biological sensors. This physiological lifelogged data can then be queried via an interface which utilises contextual memory retrieval cues to assist people remember what type of activity they were doing at a particular time. This may be helpful in the diagnosis of potential medical conditions or encourage wellness behaviours.
http://doras.dcu.ie/4723/
Marked
Mark
Evaluating Ground Truth for ADRess as a Preprocess for Automatic Musical Instrument Identification
(2009)
McKay, Joey; Gainza, Mikel; Barry, Dan
Evaluating Ground Truth for ADRess as a Preprocess for Automatic Musical Instrument Identification
(2009)
McKay, Joey; Gainza, Mikel; Barry, Dan
Abstract:
<p>Most research in musical instrument identification has focused on labeling isolated samples or solo phrases. A robust instrument identification system capable of dealing with polytimbral recordings of instruments remains a necessity in music information retrieval. Experiments are described which evaluate the ground truth of ADRess as a sound source separation technique used as a preprocess to automatic musical instrument identification. The ground truth experiments are based on a number of basic acoustic features, while using a Gaussian Mixture Model as the classification algorithm. Using all 44 acoustic feature dimensions, successful identification rates are achieved.</p>
http://arrow.dit.ie/argcon/41
Marked
Mark
The annotation of traditional Irish dance music using MATT2 and TANSEY
(2008)
Duggan, Bryan; O'Shea, Brendan; Gainza, Mikel
The annotation of traditional Irish dance music using MATT2 and TANSEY
(2008)
Duggan, Bryan; O'Shea, Brendan; Gainza, Mikel
Abstract:
Currents estimates put the canon of traditional Irish dance tunes at least 7,000 compositions. Given this diversity, a common problem faced by musicians and ethnomusicologists is identifying tunes from recordings. This is evident even in the number of commercial recordings whose title is gan ainm (without name). This work attempts to solve this problem by developing a Content Based Music Information Retrieval (CBMIR) System adapted to the characteristics of traditional Irish music. A system is presented called MATT2 (Machine Annotation of Traditional Tunes) whose primary goal is to annotate recordings of traditional Irish dance music with useful meta-data including tune names. MATT2 incorporates a number of novel algorithms for transcription of traditional music and for adapting melodic similarity measures to the creativity and style present in the playing of traditional music. It incorporates a new algorithm for filtering ornamentation notes and accommodating "the long note&qu...
http://arrow.dit.ie/scschcomcon/14
Marked
Mark
Annotation and Navigation in Semantic Wikis
(2006)
Oren, Eyal; Delbru, Renaud; Möller, Knud; Handschuh, Siegfried
Annotation and Navigation in Semantic Wikis
(2006)
Oren, Eyal; Delbru, Renaud; Möller, Knud; Handschuh, Siegfried
Abstract:
Semantic Wikis allow users to semantically annotate their Wiki content. The particular annotations can differ in expressive power, simplicity, and meaning. We present an elaborate conceptual model for semantic annotations, introduce a unique and rich Wiki syntax for these annotations, and discuss how to best formally represent the augmented Wiki content. We improve existing navigation techniques to automatically construct faceted browsing for semistructured data. By utilising the Wiki annotations we provide greatly enhanced information retrieval. Further we report on our ongoing development of these techniques in our prototype SemperWiki.
http://hdl.handle.net/10379/574
Marked
Mark
Crowdsourced real-world sensing: sentiment analysis and the real-time web
(2010)
Bermingham, Adam; Smeaton, Alan F.
Crowdsourced real-world sensing: sentiment analysis and the real-time web
(2010)
Bermingham, Adam; Smeaton, Alan F.
Abstract:
The advent of the real-time web is proving both challeng- ing and at the same time disruptive for a number of areas of research, notably information retrieval and web data mining. As an area of research reaching maturity, sentiment analysis oers a promising direction for modelling the text content available in real-time streams. This paper reviews the real-time web as a new area of focus for sentiment analysis and discusses the motivations and challenges behind such a direction.
http://doras.dcu.ie/15585/
Marked
Mark
When to cross Over? Cross-language linking using Wikipedia for VideoCLEF 2009
(2010)
Gyarmati, Agnes; Jones, Gareth J.F.
When to cross Over? Cross-language linking using Wikipedia for VideoCLEF 2009
(2010)
Gyarmati, Agnes; Jones, Gareth J.F.
Abstract:
We describe Dublin City University (DCU)'s participation in the VideoCLEF 2009 Linking Task. Two approaches were implemented using the Lemur information retrieval toolkit. Both approaches rst extracted a search query from the transcriptions of the Dutch TV broadcasts. One method rst performed search on a Dutch Wikipedia archive, then followed links to corresponding pages in the English Wikipedia. The other method rst translated the extracted query using machine translation and then searched the English Wikipedia collection directly. We found that using the original Dutch transcription query for searching the Dutch Wikipedia yielded better results.
http://doras.dcu.ie/15365/
Marked
Mark
HITS and misses: combining BM25 with HITS for expert search
(2010)
Leveling, Johannes; Jones, Gareth J.F.
HITS and misses: combining BM25 with HITS for expert search
(2010)
Leveling, Johannes; Jones, Gareth J.F.
Abstract:
This paper describes the participation of Dublin City University in the CriES (Cross-Lingual Expert Search) pilot challenge. To realize expert search, we combine traditional information retrieval (IR)using the BM25 model with reranking of results using the HITS algorithm. The experiments were performed on two indexes, one containing all questions and one containing all answers. Two runs were submitted. The first one contains the combination of results from IR on the questions with authority values from HITS; the second contains the reranked results from IR on answers with authority values. To investigate the impact of multilinguality, additional experiments were conducted on the English topic subset and on all topics translated into English with Google Translate. The overall performance is moderate and leaves much room for improvement. However, reranking results with authority values from HITS typically improved results and more than doubled the number of relevant and retrieved resu...
http://doras.dcu.ie/15832/
Marked
Mark
Towards 'Cranfield' test collections for personal data search evaluation
(2011)
Kelly, Liadh; Jones, Gareth J.F.
Towards 'Cranfield' test collections for personal data search evaluation
(2011)
Kelly, Liadh; Jones, Gareth J.F.
Abstract:
Desktop archives are distinct from sources for which shared “Cranfield” information retrieval test collections1have been created to date. Differences associated with desktop collections include: they are personal to the archive owner, the owner has personal memories about the items contained within them, and only the collection owner can rate the relevance of items retrieved in response to their query. In this paper we discuss these unique attributes of desktop collections and search, and the resulting challenges associated with creating test collections for desktop search. We also outline a proposed strategy for creating test collections for this space.
http://doras.dcu.ie/16331/
Marked
Mark
Overview of VideoCLEF 2008: Automatic generation of topic-based feeds for dual language audio-visual content
(2009)
Larson, Martha ; Newman, Eamonn; Jones, Gareth J.F.
Overview of VideoCLEF 2008: Automatic generation of topic-based feeds for dual language audio-visual content
(2009)
Larson, Martha ; Newman, Eamonn; Jones, Gareth J.F.
Abstract:
The VideoCLEF track, introduced in 2008, aims to develop and evaluate tasks related to analysis of and access to multilingual multimedia content. In its first year, VideoCLEF piloted the Vid2RSS task, whose main subtask was the classification of dual language video (Dutchlanguage television content featuring English-speaking experts and studio guests). The task offered two additional discretionary subtasks: feed translation and automatic keyframe extraction. Task participants were supplied with Dutch archival metadata, Dutch speech transcripts, English speech transcripts and 10 thematic category labels, which they were required to assign to the test set videos. The videos were grouped by class label into topic-based RSS-feeds, displaying title, description and keyframe for each video. Five groups participated in the 2008 VideoCLEF track. Participants were required to collect their own training data; both Wikipedia and general web content were used. Groups deployed various classifier...
http://doras.dcu.ie/16187/
Marked
Mark
Structural term extraction for expansion of template-based genomic queries
(2005)
Camous, Fabrice ; Blott, Stephen ; Gurrin, Cathal ; Jones, Gareth J.F.; F. Smeaton, Alan
Structural term extraction for expansion of template-based genomic queries
(2005)
Camous, Fabrice ; Blott, Stephen ; Gurrin, Cathal ; Jones, Gareth J.F.; F. Smeaton, Alan
Abstract:
This paper describes our experiments run to address the ad hoc task of the TREC 2005 Genomics track. The task topics were expressed with 5 different structures called Generic Topic Templates (GTTs). We hypothesized the presence of GTT-specific structural terms in the free-text fields of documents relevant to a topic instantiated from that same GTT. Our experiments aimed at extracting and selecting candidate structural terms for each GTT. Selected terms were used to expand initial queries and the quality of the term selection was measured by the impact of the expansion on initial search results. The evaluation used the task training topics and the associated relevance information. This paper describes the two term extraction methods used in the experiments and the resulting two runs sent to NIST for evaluation.
http://doras.dcu.ie/16200/
Marked
Mark
Multilingual log analysis: LogCLEF
(2011)
Nunzio, Giorgio Maria Di; Leveling, Johannes; Mandl, Thomas
Multilingual log analysis: LogCLEF
(2011)
Nunzio, Giorgio Maria Di; Leveling, Johannes; Mandl, Thomas
Abstract:
The current lack of recent and long-term query logs makes the verifiability and repeatability of log analysis experiments very limited. A first attempt in this direction has been made within the Cross-Language Evaluation Forum in 2009 in a track named LogCLEF which aims to stimulate research on user behaviour in multilingual environments and promote standard evaluation collections of log data. We report on similarities and differences of the most recent activities for LogCLEF.
http://doras.dcu.ie/16438/
Marked
Mark
DCU and ISI@INEX 2010: Ad-hoc and data-centric tracks
(2010)
Ganguly, Debasis; Leveling, Johannes; Jones, Gareth J.F.
DCU and ISI@INEX 2010: Ad-hoc and data-centric tracks
(2010)
Ganguly, Debasis; Leveling, Johannes; Jones, Gareth J.F.
Abstract:
We describe the participation of Dublin City University (DCU)and the Indian Statistical Institute (ISI) in INEX 2010. The main contributions of this paper are: i) a simplified version of Hierarchical Language Model (HLM) which involves scoring XML elements with a combined probability of generating the given query from itself and the top level article node, is shown to outperform the baselines of Language Model (LM) and Vector Space Model (VSM) scoring of XML elements; ii) the Expectation Maximization (EM) feedback in LM is shown to be the most effective on the domain specic collection of IMDB; iii) automated removal of sentences indicating aspects of irrelevance from the narratives of INEX ad-hoc topics is shown to improve retrieval eectiveness.
http://doras.dcu.ie/16418/
Marked
Mark
Unnamed locations, underspecified regions, and other linguistic phenomena in geographic annotation of water-based locations
(2010)
Leveling, Johannes
Unnamed locations, underspecified regions, and other linguistic phenomena in geographic annotation of water-based locations
(2010)
Leveling, Johannes
Abstract:
This short paper investigates how locations in or close to water masses in topics and documents (e.g. rivers, seas, oceans) are referred to. For this study, 13 topics from the GeoCLEF topics 2005-2008 aiming at documents on rivers, oceans, or sea names were selected and the corresponding relevant documents retrieved and manually annotated. Results of the geographic annotation indicate that i) topics aiming at locations close to water contain a wide variety of spatial relations (indicated by dierent prepositions), ii) unnamed locations can be generated on-the-fly by referring to movable objects (e.g. ships, planes) travelling along a path, iii) underspecied regions are referenced by proximity or distance or directional relations. In addition, several generic expressions (e.g. "in international waters") are frequently used, but refer to different underspecified regions.
http://doras.dcu.ie/16445/
Marked
Mark
Building user interest profiles from wikipedia clusters
(2011)
Min, Jinming; Jones, Gareth J.F.
Building user interest profiles from wikipedia clusters
(2011)
Min, Jinming; Jones, Gareth J.F.
Abstract:
Users of search systems are often reluctant to explicitly build profiles to indicate their search interests. Thus automatically building user profiles is an important research area for personalized search. One difficult component of doing this is accessing a knowledge system which provides broad coverage of user search interests. In this work, we describe a method to build category id based user profiles from a user's historical search data. Our approach makes significant use of Wikipedia as an external knowledge resource.
http://doras.dcu.ie/16398/
Marked
Mark
Automatic tagging and geotagging in video collections and communities
(2011)
Larson, Martha ; Soleymani, Mohammad ; Serdyukov, Pavel ; Jones, Gareth J.F.
Automatic tagging and geotagging in video collections and communities
(2011)
Larson, Martha ; Soleymani, Mohammad ; Serdyukov, Pavel ; Jones, Gareth J.F.
Abstract:
Automatically generated tags and geotags hold great promise to improve access to video collections and online communi- ties. We overview three tasks offered in the MediaEval 2010 benchmarking initiative, for each, describing its use scenario, definition and the data set released. For each task, a reference algorithm is presented that was used within MediaEval 2010 and comments are included on lessons learned. The Tagging Task, Professional involves automatically matching episodes in a collection of Dutch television with subject labels drawn from the keyword thesaurus used by the archive staff. The Tagging Task, Wild Wild Web involves automatically predicting the tags that are assigned by users to their online videos. Finally, the Placing Task requires automatically assigning geo-coordinates to videos. The specification of each task admits the use of the full range of available information including user-generated metadata, speech recognition transcripts, audio, and visual features.
http://doras.dcu.ie/16500/
Marked
Mark
Information quality and diverse information systems situations
(2011)
Foley, Owen
Information quality and diverse information systems situations
(2011)
Foley, Owen
Abstract:
Information quality is a recurring problem that many organisations contend with. Despite investment in both technology, and the renement of information systems, the problem persists. Information systems deployment has; in recent years undergone radical change; the traditional deployment where the architecture, user and access device were known at the time of development, have been replaced by more diverse situations. These diverse situations include web interfaces, traditional client server and a mobile devices revolution. The aim of our research is to improve information quality assessment by catering for diverse information systems situations by the design and construction of a method. Several information quality frameworks have been developed to cater for these new and evolving information systems. The expansion of frameworks across a large number of domains presents problems with respect to: framework choice, appropriateness, validity and users perceptions of information quality...
http://doras.dcu.ie/16432/
Marked
Mark
Can future physical assessment continue without support from computer science?
(2011)
Doherty, Aiden R.; Kelly, Paul; Smeaton, Alan F.; Foster, Charlie
Can future physical assessment continue without support from computer science?
(2011)
Doherty, Aiden R.; Kelly, Paul; Smeaton, Alan F.; Foster, Charlie
Abstract:
Purpose: Public health research requires data-intense studies over extended periods. With the advent of new technologies, there has been a resulting explosion in the amount of data generated by wearable sensors that can be used in physical activity research. Unfortunately the advances in hardware (e.g. device size), have not been matched by software to help manage, organise and analyse this data deluge. Public health research will require cross-disciplinary interactions with the computer science community in working towards solutions to automatically recognise human activities from wearable sensor data. Methods: We conducted a meta-review of contemporary computing science and information retrieval approaches such as: 1) the management and indexing of data from wearable accelerometer and image capturing devices; 2) the synchronisation and fusion of data from multiple devices (e.g. GPS, accelerometer, & SenseCam data); and 3) the representation of the meaning of image data Res...
http://doras.dcu.ie/16836/
Marked
Mark
The Evaluation of Adaptive and User-Adaptive Systems: A Review
(2011)
WADE, VINCENT PATRICK; SHARP, MARY; LAWLESS, SEAMUS; MULWA, CATHERINE
The Evaluation of Adaptive and User-Adaptive Systems: A Review
(2011)
WADE, VINCENT PATRICK; SHARP, MARY; LAWLESS, SEAMUS; MULWA, CATHERINE
Abstract:
A current problem with the research of adaptive systems is the inconsistency of evaluation applied to the adaptive systems. However, evaluating an adaptive system is a difficult task due to the complexity of such systems. Evaluators need to ensure correct evaluation methods and measurement metrics are used. This paper reviews a variety of evaluation techniques applied in adaptive and user-adaptive systems. More specifically, it focuses on the user-centred evaluation of adaptive systems such as personalised recommender systems and adaptive information retrieval systems. The review tackles the question of ‘How have user-centred evaluations of adaptive and user-adaptive systems been conducted and how can these evaluation practices be improved?’ Based on the analysed results of the: (a) evaluation approaches, (b) user-centred evaluation techniques, and (c) evaluation metrics, we propose an evaluation framework for end-user experience in evaluating adaptive systems (EFEx).
http://hdl.handle.net/2262/62458
Marked
Mark
A context information service using ontology-based queries
(2004)
CONLAN, OWEN; LEWIS, DAVID; O'SULLIVAN, DECLAN; POWER, RUAIDHRI SEAN; WADE, VINCEN...
A context information service using ontology-based queries
(2004)
CONLAN, OWEN; LEWIS, DAVID; O'SULLIVAN, DECLAN; POWER, RUAIDHRI SEAN; WADE, VINCENT PATRICK
Abstract:
peer-reviewed
Ubiquitous computing environments have the potential to provide rich sources of information about a user and their surroundings. However, the nature of context information means that it must be gathered in an ad-hoc and distributed manner with many devices and sensors storing potentially relevant data. In an ad-hoc ubiquitous computing environment, retrieval of context information cannot rely on a fixed meta-data schema. This works shows how an ontology driven context service architecture may perform distributed open schema queries over heterogeneous context sources in a potentially decentralised manner.
http://hdl.handle.net/2262/22604
Marked
Mark
Segmenting and summarizing general events in a long-term lifelog
(2011)
Chen, Yi; Jones, Gareth J.F.; Ganguly, Debasis
Segmenting and summarizing general events in a long-term lifelog
(2011)
Chen, Yi; Jones, Gareth J.F.; Ganguly, Debasis
Abstract:
Lifelogging aims to capture a person’s life experiences using digital devices. When captured over an extended period of time a lifelog can potentially contain millions of files from various sources in a range of formats. For lifelogs containing such massive numbers of items, we believe it is important to group them into meaningful sets and summarize them, so that users can search and browse their lifelog data efficiently. Existing studies have explored the segmentation of continuously captured images over short periods of at most a few days into small groups of “events” (episodes). Yet, for long-term lifelogs, higher levels of abstraction are desirable due to the very large number of “events” which will occur over an extended period. We aim to segment a long-term lifelog at the level of general events which typically extend beyond a daily boundary, and to select summary information to represent these events. We describe our current work on higher level segmentation and summary in...
http://doras.dcu.ie/16394/
Marked
Mark
Using dempster-shafer theory to fuse multiple information sources in region-based segmentation
(2007)
Adamek, Tomasz; O'Connor, Noel E.
Using dempster-shafer theory to fuse multiple information sources in region-based segmentation
(2007)
Adamek, Tomasz; O'Connor, Noel E.
Abstract:
This paper presents a new method for segmentation of images into large regions that reflect the real world objects present in a scene. It explores the feasibility of utilizing spatial configuration of regions and their geometric properties (the so-called Syntactic Visual Features [1]) for improving the correspondence of segmentation results produced by the well-known Recursive Shortest Spanning Tree (RSST) algorithm [2] to semantic objects present in the scene. The main contribution of this paper is a novel framework for integration of evidence from multiple sources with the region merging process based on the Dempster-Shafer (DS) theory [3] that allows integration of sources providing evidence with different accuracy and reliability. Extensive experiments indicate that the proposed solution limits formation of regions spanning more than one semantic object.
http://doras.dcu.ie/217/
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