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Article
Publication date: 1 June 2015

Maria Indrawan-Santiago, Matthias Steinbauer and Gabriele Anderst-Kotsis

Abstract

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 6 April 2010

Sabine Bachmayer, Artur Lugmayr and Gabriele Kotsis

TV changes in several disciplines concurrently: from analogue to digital, from scheduled broadcasts to on‐demand TV on the internet, from a lean‐back (passive) to a…

Abstract

Purpose

TV changes in several disciplines concurrently: from analogue to digital, from scheduled broadcasts to on‐demand TV on the internet, from a lean‐back (passive) to a lean‐forward (active) media, from straight watching to the consumption of content connected to additional services, from the sole TV viewer to the viewer being part in social networks and communities regarding to the TV content, etc. The purpose of this paper is to demonstrate the adaptation of design and realization of TV program formats to the changes that happen to television. In addition, the paper would like find out how to support the design of interactions, dynamic narrations and content types as well as the role of the internet within these processes and this application area.

Design/methodology/approach

Currently, there exist many approaches towards the development of social, collaborative, and interactive TV program formats and systems. Within the scope of this paper, the authors present latest case studies and example program formats for each case. The paper examines them concerning their interaction possibilities and architecture as well as the influence and utilization of the web. Finally, the paper provides a simple categorization according to the narration character, content, and interactivity types of the listed TV program formats.

Findings

Caused by the collaborative and interactive characteristic of the web, a big influence of the web concerning the hardware‐ and content‐sided development of TV is discovered. Nevertheless, the web's potential is absolutely not exploited in this area, neither to give more dynamic to the narration, nor to appreciate the content type or the interactivity. Finally, the paper identifies a high effort, occurrence and development in the interactivity, in contrary to the narration characteristic and content types.

Research limitations/implications

Only one representative, example TV program format enabling interactions by the viewer for each case in the paper, has been chosen. The authors make no claim to be complete, in covering all genres, possibilities of interaction or TV program formats existing for the field of interactive/social/collaborative TV.

Originality/value

This paper presents an extension of a previous paper presented at the MoMM2009.

Details

International Journal of Web Information Systems, vol. 6 no. 1
Type: Research Article
ISSN: 1744-0084

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Article
Publication date: 27 May 2014

Sylva Girtelschmid, Matthias Steinbauer, Vikash Kumar, Anna Fensel and Gabriele Kotsis

The purpose of this article is to propose and evaluate a novel system architecture for Smart City applications which uses ontology reasoning and a distributed stream…

Abstract

Purpose

The purpose of this article is to propose and evaluate a novel system architecture for Smart City applications which uses ontology reasoning and a distributed stream processing framework on the cloud. In the domain of Smart City, often methodologies of semantic modeling and automated inference are applied. However, semantic models often face performance problems when applied in large scale.

Design/methodology/approach

The problem domain is addressed by using methods from Big Data processing in combination with semantic models. The architecture is designed in a way that for the Smart City model still traditional semantic models and rule engines can be used. However, sensor data occurring at such Smart Cities are pre-processed by a Big Data streaming platform to lower the workload to be processed by the rule engine.

Findings

By creating a real-world implementation of the proposed architecture and running simulations of Smart Cities of different sizes, on top of this implementation, the authors found that the combination of Big Data streaming platforms with semantic reasoning is a valid approach to the problem.

Research limitations/implications

In this article, real-world sensor data from only two buildings were extrapolated for the simulations. Obviously, real-world scenarios will have a more complex set of sensor input values, which needs to be addressed in future work.

Originality/value

The simulations show that merely using a streaming platform as a buffer for sensor input values already increases the sensor data throughput and that by applying intelligent filtering in the streaming platform, the actual number of rule executions can be limited to a minimum.

Details

International Journal of Pervasive Computing and Communications, vol. 10 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Quang-Minh Nguyen and Tuan-Dung Cao

The purpose of this paper is to propose an automatic method to generate semantic annotations of football transfer in the news. The current automatic news integration…

Abstract

Purpose

The purpose of this paper is to propose an automatic method to generate semantic annotations of football transfer in the news. The current automatic news integration systems on the Web are constantly faced with the challenge of diversity, heterogeneity of sources. The approaches for information representation and storage based on syntax have some certain limitations in news searching, sorting, organizing and linking it appropriately. The models of semantic representation are promising to be the key to solving these problems.

Design/methodology/approach

The approach of the author leverages Semantic Web technologies to improve the performance of detection of hidden annotations in the news. The paper proposes an automatic method to generate semantic annotations based on named entity recognition and rule-based information extraction. The authors have built a domain ontology and knowledge base integrated with the knowledge and information management (KIM) platform to implement the former task (named entity recognition). The semantic extraction rules are constructed based on defined language models and the developed ontology.

Findings

The proposed method is implemented as a part of the sport news semantic annotations-generating prototype BKAnnotation. This component is a part of the sport integration system based on Web Semantics BKSport. The semantic annotations generated are used for improving features of news searching – sorting – association. The experiments on the news data from SkySport (2014) channel showed positive results. The precisions achieved in both cases, with and without integration of the pronoun recognition method, are both over 80 per cent. In particular, the latter helps increase the recall value to around 10 per cent.

Originality/value

This is one of the initial proposals in automatic creation of semantic data about news, football news in particular and sport news in general. The combination of ontology, knowledge base and patterns of language model allows detection of not only entities with corresponding types but also semantic triples. At the same time, the authors propose a pronoun recognition method using extraction rules to improve the relation recognition process.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Trung Tran and Dang Tuan Nguyen

The purpose of this paper is to enhance the quality of new reducing sentence in sentence-generation-based summarizing method by establishing consequence relationship…

Abstract

Purpose

The purpose of this paper is to enhance the quality of new reducing sentence in sentence-generation-based summarizing method by establishing consequence relationship between two action, state or process Vietnamese sentences.

Design/methodology/approach

First, types of pairs of Vietnamese sentences based on presupposition about the consequence relationship is classified: the verb indicating action or state at the first sentence is considered as the consequence of the verb indicating action, state or process at the second sentence. Then main predicates in Discourse Representation Structure – a logical form which represents the semantic of a given pair of sentences – is analyzed and inner- and inter-sentential relationships are determined. The next step is to generate the syntactic structure of the new reducing sentence. Finally, a combination with the built set of lexicons is done to complete the new meaning-summarizing Vietnamese sentence.

Findings

This method makes the new meaning-summarizing Vietnamese sentence satisfy two requirements: summarize the semantic of the given pair of Vietnamese sentences and have naturalism in common Vietnamese communication. In addition, it is possible to extend the method and apply for the purpose of summarizing the more complex Vietnamese paragraphs as well as paragraphs in other languages.

Research limitations/implications

At the first step, only inter-sentential consequence relationship is considered and this is applied to the limit types of pairs of Vietnamese sentences which have a simple structure.

Originality/value

This study presents improvements in sentence-generation-based summarization method to enhance the quality of new meaning-summarizing Vietnamese sentences. This method proves effective in summarizing the considered pairs of sentences.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Wilson Abel Alberto Torres, Nandita Bhattacharjee and Bala Srinivasan

The purpose of this paper is to determine the effectiveness of using fully homomorphic encryption (FHE) to preserve the privacy of biometric data in an authentication…

Abstract

Purpose

The purpose of this paper is to determine the effectiveness of using fully homomorphic encryption (FHE) to preserve the privacy of biometric data in an authentication system. Biometrics offers higher accuracy for personal recognition than traditional methods because of its properties. Biometric data are permanently linked with an individual and cannot be revoked or cancelled, especially when biometric data are compromised, leading to privacy issues.

Design/methodology/approach

By reviewing current approaches, FHE is considered as a promising solution for the privacy issue because of its ability to perform computations in the encrypted domain. The authors studied the effectiveness of FHE in biometric authentication systems. In doing so, the authors undertake the study by implementing a protocol for biometric authentication system using iris.

Findings

The security analysis of the implementation scheme demonstrates the effectiveness of FHE to protect the privacy of biometric data, as unlimited operations can be performed in the encrypted domain, and the FHE secret key is not shared with any other party during the authentication protocol.

Research limitations/implications

The use of malicious model in the design of the authentication protocol to improve the privacy, packing methods and use of low-level programming language to enhance performance of the system needs to be further investigated.

Originality/value

The main contributions of this paper are the implementation of a privacy-preserving iris biometric authentication protocol adapted to lattice-based FHE and a sound security analysis of authentication and privacy.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Yuki Yamamoto, Tadahiko Kumamoto and Akiyo Nadamoto

– The purpose of this paper is to propose a method of calculating the sentiment value of a tweet based on the emoticon role.

Abstract

Purpose

The purpose of this paper is to propose a method of calculating the sentiment value of a tweet based on the emoticon role.

Design/methodology/approach

Classification of emoticon roles as four types showing “emphasis”, “assuagement”, “conversion” and “addition”, with roles determined based on the respective relations to sentiment of sentences and emoticons.

Findings

Clustering of users of four types based on emoticon sentiment.

Originality/value

Formalization, using regression analysis, of the relation of sentiment between sentences and emoticons in all roles.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Tadahiko Kumamoto, Hitomi Wada and Tomoya Suzuki

The purpose of this paper is to propose a Web application system for visualizing Twitter users based on temporal changes in the impressions received from the tweets posted…

Abstract

Purpose

The purpose of this paper is to propose a Web application system for visualizing Twitter users based on temporal changes in the impressions received from the tweets posted by the users on Twitter.

Design/methodology/approach

The system collects a specified user’s tweets posted during a specified period using Twitter API, rates each tweet based on three distinct impressions using an impression mining system, and then generates pie and line charts to visualize results of the previous processing using Google Chart API.

Findings

Because there are more news articles featuring somber topics than those featuring cheerful topics, the impression mining system, which uses impression lexicons created from a newspaper database, is considered to be more effective for analyzing negative tweets.

Research limitations/implications

The system uses Twitter API to collect tweets from Twitter. This suggests that the system cannot collect tweets of the users who maintain private timelines. According to our questionnaire, about 30 per cent of Twitter users’ timelines are private. This is one of the limitations to using the system.

Originality/value

The system enables people to grasp the personality of Twitter users by visualizing the impressions received from tweets the users normally post on Twitter. The target impressions are limited to those represented by three bipolar scales of impressions: “Happy/Sad”, “Glad/Angry” and “Peaceful/Strained”. The system also enables people to grasp the context in which keywords are used by visualizing the impressions from tweets in which the keywords were found.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 1 June 2015

Robin Mueller, Sebastian Schrittwieser, Peter Fruehwirt, Peter Kieseberg and Edgar Weippl

This paper aims to give an overview on a number of selected applications in comparison to a previous evaluation conducted two years ago, as well as performing an analysis…

Abstract

Purpose

This paper aims to give an overview on a number of selected applications in comparison to a previous evaluation conducted two years ago, as well as performing an analysis on several new applications. Mobile messaging and VoIP applications for smartphones have seen a massive surge in popularity, which has also sparked the interest in research related to their security and privacy protection, leading to in-depth analyses of specific applications or vulnerabilities.

Design/methodology/approach

The evaluation methods mostly focus on known vulnerabilities in connection with authentication and validation mechanisms but also describe some newly identified attack vectors.

Findings

The results show a positive trend for new applications, which are mostly being developed with security and privacy features, whereas some of the older applications have shown little progress or have even introduced new vulnerabilities. In addition, this paper shows privacy implications of smartphone messaging that are not even solved by today’s most sophisticated “secure” smartphone messaging applications, as well as discusses methods for protecting user privacy during the creation of the user network.

Research limitations/implications

Currently, there is no perfect solution available; thus, further research on this topic needs to be conducted.

Originality/value

In addition to conducting a security evaluation of existing applications together with newly designed messengers that were designed with a security background in mind, several methods for protecting user privacy were discussed. Furthermore, some new attack vectors were discussed.

Details

International Journal of Pervasive Computing and Communications, vol. 11 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

Content available
Article
Publication date: 6 April 2010

Ismail Khalil

Abstract

Details

International Journal of Web Information Systems, vol. 6 no. 1
Type: Research Article
ISSN: 1744-0084

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