scholarly journals Personalized information retrieval based on context and ontological knowledge

2008 ◽  
Vol 23 (1) ◽  
pp. 73-100 ◽  
Author(s):  
PH. MYLONAS ◽  
D. VALLET ◽  
P. CASTELLS ◽  
M. FERNÁNDEZ ◽  
Y. AVRITHIS
Keyword(s):  
Information Retrieval ◽  
Ad Hoc ◽  
Effective Means ◽  
User Preferences ◽  
Context Modeling ◽  
User Interests ◽  
Automatic Interpretation ◽  
User Context ◽  
Definition Of ◽  
Key Aspects

AbstractContext modeling has long been acknowledged as a key aspect in a wide variety of problem domains. In this paper we focus on the combination of contextualization and personalization methods to improve the performance of personalized information retrieval. The key aspects in our proposed approach are (1) the explicit distinction between historic user context and live user context, (2) the use of ontology-driven representations of the domain of discourse, as a common, enriched representational ground for content meaning, user interests, and contextual conditions, enabling the definition of effective means to relate the three of them, and (3) the introduction of fuzzy representations as an instrument to properly handle the uncertainty and imprecision involved in the automatic interpretation of meanings, user attention, and user wishes. Based on a formal grounding at the representational level, we propose methods for the automatic extraction of persistent semantic user preferences, and live, ad-hoc user interests, which are combined in order to improve the accuracy and reliability of personalization for retrieval.

From Finding to Explaining

2018 ◽  
pp. 1535-1551
Author(s):  
Valentina Dragos
Keyword(s):  
Information Retrieval ◽  
Semantic Integration ◽  
Challenging Problem ◽  
Domain Experts ◽  
User Interests ◽  
Maritime Surveillance ◽  
Novel Approach ◽  
Basic Facts ◽  
Anomaly Analysis ◽  
Definition Of

Supporting anomaly analysis in the maritime field is a challenging problem because of the dynamic nature of the task: the definition of abnormal or suspicious behaviour is subject to change and depends on user interests. This paper provides a novel approach to support anomaly analysis in the maritime domain through the exploration of large collections of interpretation reports. Based on observables or more sophisticated patterns, the approach provides information retrieval strategies going from basic facts retrieval that guide short-term corrective actions to more complex networks of related concepts that help domain experts to understand or to explain abnormal vessel behaviours. Semantic integration is used to link various information sources, by using a commonly adopted standard. The paper seeks to explore different aspects of using information retrieval to support the analysis and interpretation of abnormal vessel behaviours for maritime surveillance.

Location-Aware Caching for Semantic-Based Image Queries in Mobile AD HOC Networks

2012 ◽  
Vol 3 (1) ◽  
pp. 17-35
Author(s):  
Bo Yang ◽  
Manohar Mareboyana
Keyword(s):  
Information Retrieval ◽  
Ad Hoc ◽  
Effective Means ◽  
Image Data ◽  
Research Attention ◽  
Mobile Data ◽  
Location Aware ◽  
Technological Advances ◽  
Proposed Model ◽  
Hoc Networks

Mobile image information retrieval, i.e., the processing of mobile image queries, has attracted research attention due to the recent technological advances in mobile and ubiquitous computing, network infrastructures, and multimedia streaming. The previous research focuses on data delivery, while few works have reported on content-based mobile information retrieval. Therefore, it is important to devise effective means to describe the semantics as well as content distribution of mobile data. Caching is an attractive solution that helps reveal semantic relationships among mobile data sources. However, traditional caching techniques rely on exact match of fixed values and are not efficient in dealing with imprecisely described image data. To address these issues, the authors propose a location-aware caching model which reflects the distribution of images based on the analysis of earlier queries. Through extensive simulations, the authors show that the proposed model can perform search with less cost for voluminous data.

From Finding to Explaining

2016 ◽  
Vol 7 (1) ◽  
pp. 40-55 ◽  
Author(s):  
Valentina Dragos
Keyword(s):  
Information Retrieval ◽  
Semantic Integration ◽  
Short Term ◽  
Domain Experts ◽  
User Interests ◽  
Maritime Surveillance ◽  
Novel Approach ◽  
Basic Facts ◽  
Anomaly Analysis ◽  
Definition Of

Supporting anomaly analysis in the maritime field is a challenging problem because of the dynamic nature of the task: the definition of abnormal or suspicious behaviour is subject to change and depends on user interests. This paper provides a novel approach to support anomaly analysis in the maritime domain through the exploration of large collections of interpretation reports. Based on observables or more sophisticated patterns, the approach provides information retrieval strategies going from basic facts retrieval that guide short-term corrective actions to more complex networks of related concepts that help domain experts to understand or to explain abnormal vessel behaviours. Semantic integration is used to link various information sources, by using a commonly adopted standard. The paper seeks to explore different aspects of using information retrieval to support the analysis and interpretation of abnormal vessel behaviours for maritime surveillance.

A Comparative Exploration of the Spiritual Authority of the Awliyā’ in the Shi‘i and Sufi Traditions

2015 ◽  
Vol 32 (1) ◽  
pp. 49-74
Author(s):  
Rebecca Masterton
Keyword(s):  
Twentieth Century ◽  
Critical Comparison ◽  
Spiritual Authority ◽  
Central Tenet ◽  
Definition Of ◽  
Key Aspects ◽  
Islamic Belief

This paper aims to engage in a critical comparison of the spiritual authority of the awliyā’ in the Shi‘i and Sufi traditions in order to examine an area of Islamic belief that remains unclearly defined. Similarities between Shi‘i and Sufi doctrine have long been noted, but little research has been conducted on how and why they developed. Taking a central tenet of both, walāyah, the paper discusses several of its key aspects as they appear recorded in Shi‘i ḥadīth collections and as they appear later in one of the earliest Sunni Sufi treatises. By extention, it seeks to explore the identity of the awliyā’ and their role in relation to the Twelve Imams. It also traces the reabsorption into Shi‘i culture of the Sufi definition of walāyah via two examples: the works of one branch of the Dhahabi order and those of Allamah Tabataba’i, a popular twentieth-century Iranian mystic and scholar.

Peacebuilding Functions of International Environmental Governance

2021 ◽  
pp. 1-5
Author(s):  
Ole Kristian Fauchald
Keyword(s):  
Disaster Management ◽  
Environmental Governance ◽  
Ad Hoc ◽  
International Environmental Governance ◽  
Post Conflict ◽  
Sustainable Peace ◽  
Conflict Situations ◽  
Institutional Structures ◽  
Subject Specific ◽  
Key Aspects

This chapter seeks to focus on ‘peacebuilding’ as a construct of peace among groups that have previously been in conflict. This calls for moving beyond peacemaking and conflict resolution to consider the longer-term efforts at establishing sustainable peace. Notwithstanding the longstanding efforts of UNEP’s Post-Conflict and Disaster Management Branch, there has been very limited development of international normative and institutional structures targeting the process of post-conflict sustainable peacebuilding. How far the current international environmental governance (IEG) regimes are responsive to the specific challenges to post-conflict situations? It seeks to briefly consider four key aspects of IEG regimes: (i) Ad- hoc and subject specific (ii) Incremental and facilitative (iii) Degree of reciprocity and (iv) Science-based.

The Use of Photogrammetry in Piping Design

1983 ◽  
Vol 197 (2) ◽  
pp. 125-138 ◽  
Author(s):  
P A Bracewell ◽  
U R Klement
Keyword(s):  
Information Retrieval ◽  
Mathematical Formulation ◽  
Three Dimensional ◽  
Cost Effective ◽  
Process Industry ◽  
Process Plant ◽  
Definition Of ◽  
High Degree ◽  
Positional Data

Piping design for ‘revamp’ projects in the process industry requires the retrieval of large amounts of ‘as-built’ data from existing process plant installations. Positional data with a high degree of accuracy are required. Photogrammetry, the science of measurement from photographs, was identified in Imperial Chemical Industries plc (ICI) as a suitable tool for information retrieval. The mathematical formulation enabling the definition of three-dimensional positions from photographic information is described. The process of using ICI's photogrammetric system for the definition of complete objects such as structures and pipes is illustrated. The need for specialized photogrammetric software for design purposes is explained. A case study describing how the photogrammetric system has been applied is described and graphical outputs from this exercise are shown. It is concluded that this particular photogrammetric system has proved to be a cost effective and accurate tool for the retrieval of ‘as-built’ information.

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