George Giaglis

University of Nicosia · Institute For the Future

This concluding report signifies the end of the third contractual round of the EU Blockchain Observatory and Forum (EUBOF), an initiative by the European Commission. It provides a comprehensive overview of EUBOF's activities, achievements, and impact over the past four years, while also proving insights into future trends and policy actions for blo...

The concept of appropriation is of paramount importance for the lasting use of an Information Technology (IT) artefact following its initial adoption, and therefore its success. However, quite often, users' original expectations are negatively disconfirmed, and instead of appropriating the IT artefact, they discontinue its use. In this study we exa...

Purpose The purpose of this paper is to argue for the role of the blockchain, i.e., distributed ledger technology, in building innovative business models, including machine money, autonomous economic agents and decentralised organisations. Design/methodology/approach The paper is conceptual/argumentative. As such, it draws on research on (e-)comme...

This paper suggests a modeling framework to investigate the optimal strategy followed by a monopolistic firm aiming to manipulate the process of opinion formation in a social network. The monopolist and a set of consumers communicate to form their beliefs about the underlying product quality. Since the firm’s associated optimization problem can be...

This paper develops a discrete-time, non-linear, and time-variant model of opinion formation in a social network with global interactions to investigate the relationship between the final consensus belief and the set of agents’ initial opinions. The model uses a novel and considerably intuitive updating rule, according to which the weight placed by...

The proliferation of Big Data & Analytics in recent years has compelled marketing practitioners to search for new methods when faced with assessing brand performance during brand equity appraisal. One of the challenges of current practices is that these methods rely heavily on traditional data collection and analysis methods such as questionnaires,...

This paper uses time-series analysis to study the relationship between Bitcoin prices and fundamental economic variables, technological factors and measurements of collective mood derived from Twitter feeds. Sentiment analysis has been performed on a daily basis through the utilization of a state-of-the-art machine learning algorithm, namely Suppor...

This is paper addresses the problem of tracking the time evolution of communities within co-authorship networks. We consider an evolutionary clustering approach which adapts the statistical framework of shrinkage estimation to obtain a smoothed version of the overall affinity matrix as the optimal weighted average between the matrices of past and c...

This volume contains papers presented at the 19th Pan-Hellenic Conference on Informatics (PCI 2015), which was held form October 1st until October 3rd 2015 in Technological Educational Institute (TEI) of Athens, Greece. PCI is an event established by the Greek Computer Society since 1984. It is organized in co-operation with Greek academic institut...

This paper develops a discrete-time, non-linear and time-variant model of opinion formation in a social network with global interactions to investigate the relationship between the final consensus belief and the set of agents' initial opinions. The model uses a novel and considerably intuitive updating rule, according to which the weight placed by...

This paper addresses the problem of tracking the time evolution of communities within co-authorship networks. We consider an evolutionary clustering approach which adapts the statistical framework of shrinkage estimation to obtain a smoothed version of the overall affinity matrix as the optimal weighted average between the matrices of past and curr...

Online social media has shifted the balance of power from businesses to consumers, with consumers now being able to share information almost unrestrictedly in real-time. As a result, an effort to suppress what may be considered as harmful information can easily backfire, causing the information to instantly spread through user ties. However, what i...

Inspired by the new technological advancements and the groundbreaking technology at the foundation of cryptocurrencies, organizational structures are expected to evolve and new corporate structures to emerge, based on full decentralization. We posit that the blockchain, i.e., the technology, system and protocol behind and beyond the most popular di...

While research in mobile advertising is abundant, limited attention has been paid to date to how consumers respond to mobile advertisements for different product categories and in which way impulsivity affects intentions to purchase. In this paper, we study the dimensionality of the product involvement construct and its effects on consumers’ purcha...

Analyzing the public sentiment over social media streams constitutes an extremely demanding task mainly due to the difficulties that are imposed by the wide spectrum of discussion topics that underlie a given collection of posts. This paper addresses the problem of determining the underlying semantic factors that influence the social sentiment pola...

The purpose of this paper is twofold. First, we seek to discuss and highlight the disruptive innovation that is currently under way in the evolving field of digital currencies and Bitcoin. Second, drawing on theories and frameworks in the Information Systems (IS) discipline, we highlight possible paths for research that will shed light to some of t...

Mobile websites are increasingly gaining popularity and studying their usability has become an intriguing endeavour considering the ergonomic constraints posed by the mobile devices. Mobile application usability studies are mainly focused on the effects of the mobile device employed, the application's design and the user, but less on the conditions...

Although touch computing has become an everyday occurrence, there has been little research into the subjective meanings people may assign to touch-focused IT artifacts. Following an interpretive case study with tablets, we examine blogposts, aiming to document user interpretations of the tablet, and to investigate the role of touch and that of cogn...

Although touch computing has become an everyday occurrence, there has been little research into the subjective meanings people may assign to touch-focused IT artifacts. Following an interpretive case study with tablets, we examine blogposts, aiming to document user interpretations of the tablet, and to investigate the role of touch and that of cogn...

This study attempts to investigate the potential differences among individual adoption patterns between mobile portal and mobile internet services usage. A theoretical model that reflects six unique predominant factors of IS usage is developed and is empirically tested using data collected from mobile data services (MDSs) users (116 mobile internet...

Mobile phone advertisements, in the form of text messages (SMS, or short message service), have been recognized as an important form of product promotion. The purpose of this paper is to investigate factors that influence the effectiveness of SMS advertising by using a hierarchy of effects approach. We employ a simulated experiment with 736 respond...

The urban freight distribution is highly susceptible to unexpected events that often occur during delivery, such as delays at customer locations or due to traffic conditions. Such events may lead to inferior customer service, or higher costs, areas in which intelligent real-time fleet management may prove beneficial. In this paper, the authors pres...

This paper addresses the problem of semantically meaningful group detection within a sub-community of twitter micro-bloggers by utilizing a topic modeling, multi-objective clustering approach. The proposed group detection method is anchored on the Latent Dirichlet Allocation (LDA) topic modeling technique, aiming at identifying clusters of twitter...

This paper addresses the problem of semantically meaningful group detection within a sub-community of twitter micro-bloggers by utilizing a topic modeling, multi-objective clustering approach. The proposed group detection method is anchored on the Latent Dirichlet Allocation (LDA) topic modeling technique, aiming at identifying clusters of twitter...

Technology continuously revolutionizes the way people interact with information technology (IT). In this article we argue that, while extant literature has certainly provided rich insights into meaning making with IT artifacts, the tablet's proliferation calls for reassigning the significance these may hold for users. Approaching user experience as...

National and regional public authorities need to align their planned introduction of mobile/wireless innovation with the maturity levels of both their workforce (who will manage and maintain the new applications) and their citizens (who will use them). We draw on the experience of working with local authorities in three Mediterranean countries (Gre...

As mobile devices permeate daily life, several studies investigate how users react when technology falls short of their expectations. In this paper, we deploy a data/frame model to examine sensemaking processes through which users approach their interaction with the tablet under conditions of discomfort. We show that users eventually handle such pr...

Research on mobile commerce has attracted the interest of e-commerce scholars ever since mobile and portable devices became a widespread and effective means of commercial transactions and business practices. In the present editorial of this special issue of IJEC, we first revisit the past of m-commerce practice and research through an analysis of m...

Technology acceptance theories predict user intentions to use services tailored for organisational needs. However, in this paper, we postulate that the aforementioned theories do not apply when investigating intentions towards the use of mobile data services (MDS), as the latter encompasses supplementary characteristics, such as fun and enjoyment,...

This paper examines the interplay between meaning and emotion of tablet users during the interaction with these artifacts. Following an interpretive case study approach, we examine users’ meaning making as the context of use changes from the business context to the personal environment, trailing users’ interpretation of the tablet and their overall...

Research in virtual teams and distributed work argues that the lack of collocation places an overhead on the performance potential of large, globally distributed teams. In this paper, we revisit this tenet through a case study of Free/Libre Open Source Software (FLOSS) development to demonstrate how globally dispersed FLOSS communities manage to ov...

The purpose of this chapter is to illustrate and reflect upon the extant literature on mobile marketing with a view of identifying contributions, gaps and avenues for future research. The review is based on more than two hundred articles published in leading journals and conference proceedings. We first discuss key areas that have already attracted...

Business process modelling (BPM) is an emerging field of simulation application. Simulation of business processes is increasingly being recognised as an extremely useful tool for assessing the feasibility, efficiency, and effectiveness of process re-engineering decisions. However, almost all of the reported experience is confined to re-engineering...

EDI is expected to be the dominant form of business communication between organisations moving to the Electronic Commerce era of 2000. The emergence of world-wide EDI standards (like EDIFACT) is a key driver towards this direction. However, the design of new EDIFACT messages is a tedious and complicated task, due to the strict restrictions imposed...

Purpose – The purpose of this paper is to study the impact of managerial perceptions regarding the competitive environment and organizational capabilities on the way firms respond to their rivals' competitive actions. Design/methodology/approach – The authors draw on competitive dynamics theory to develop a model that is empirically tested in 174...

The proliferation of technological advances have made possible the development of mobile applications that can effectively support organizers and attendees, mobile applications are easily accessible through a smart phone and the user can effortlessly upload or retrieve any pertinent information. This paper presents CoMMA, a web-based mobile applica...

Excessive taxation in the telecoms services sector is rarely found in developed economies as it hinders high technology investments, confines innovation and eventually impedes economic growth. Recession eventually complicates this process. In this paper the repercussions of multi-layer service taxation on the Greek mobile sector during the last fiv...

The purpose of this study is to identify the relationship between mobile consumers' attitude and their demographic characteristics. New variables such as Personal Technological Innovativeness and Mobile Phone Design are constructed and their association with some demographic attributes is examined. Further, the research explores to what degree mobi...

Managing a conference can be a frustrating process for both organizers and attendees. However, technological advances have made possible the development of mobile applications that can effectively support both parties; mobile applications are easily accessible through a smartphone and the user can effortlessly upload or retrieve any pertinent infor...

Work on how consumers evaluate electronic service quality is both topical and important due to the well accepted criticality of electronic channels in selling products and services. However, the extant research on electronic research quality is preoccupied with the web site internet context and most of the studies are single-country studies, inhibi...

Pervasive Information Systems (IS) exemplify a paradigm where Information Technology is embedded in the physical environment, capable of accommodating user needs and wants when desired. Pervasive IS differ from IS that are based on the desktop paradigm in that they encompass a complex, dynamic environment composed of multiple artifacts, capable of...

The present study proposes a new approach for the examination of the individual user’s acceptance of technology and Information Systems. In particular, it examines the mediating role of Emotional State toward the individual acceptance of Pervasive Information Systems. The proposed research model was tested with data collected through an exploratory...

The quality of interaction with a mobile website is arguably influenced by the prevailing conditions of use. The characteristics of the latter have not been sufficiently addressed in HCI literature yet, partly because they cannot be easily controlled in a usability study. Drawing on multidisciplinary theories, we propose a model hypothesizing on th...

This study aims at investigating the adoption behavior of mobile Internet users in Greece. An integrated model comprising of seven factors was developed and tested through the execution of a national telephone survey (N=139). The results of the survey suggest that the emotional state of individuals while using mobile Internet, social influence from...

We study the extent to which regulatory and market-related conditions in Finland, Greece and the Netherlands explain the uptake of advanced mobile data services in these countries. By comparing data from a common survey, models are tested through structural equation modelling. We find significant differences and communalities in the factors affecti...

Mobile phone advertisements, in the form of text messages (SMS), are becoming increasingly recognized as an important form of product promotion. The purpose of this paper is to investigate factors influencing the effectiveness of SMS advertisements by using a hierarchy of effects approach. We employ a field experiment with 736 respondents to examin...

This study attempts to investigate the potential differences among individual adoption patterns between m-portal and m-internet services usage. A theoretical model that reflects a set of unique predominant factors of IS usage was developed. The model was empirically tested using data collected on mobile data services adoption. The results indicate...

Although the inherent interrelationships between Business Processes (BP) and the underlying Information Technology (IT) infrastructure imply that the design of these two organisational facets should be performed in parallel, this doesn't seem to be the case in practice. For example, simulation is being extensively used in both the BP and IT domains...

Technology acceptance theories predict user intentions to use services tailored for organizational needs. However, in this paper we postulate that the aforementioned theories do not apply when investigating intentions towards the use of mobile data services (MDS), as the latter encompass supplementary characteristics, such as fun and enjoyment, whi...

Pervasive Information Systems exemplify a paradigm where Information Technology is embedded in the physical environment, capable of accommodating user needs and wants when desired. Pervasive IS differ from IS that are based on the desktop paradigm in that they encompass a complex, dynamic setting composed of multiple artefacts, capable of perceivin...

Environmental conditions arguably influence mobile website usability, especially as users on the move may be exposed to fluctuating contextual conditions. Since the aspects of context cannot be readily simulated in a mobile usability study, the development of theories and models explaining how the context of use may affect usability has yet to be s...

Abstract Asthe,evolution of e-business,technology,has passed,from,the early phase,of hype,and innovation to the mature phase of adoption and use, the research interest of both the academic,and business,communities,is shifting to investigating opportunities,for market exploitation of e-business technologies. As a result, the debates around establish...

Studying the adoption and acceptance of Mobile Data Services (MDS) has been an intriguing endeavour for quite some time. Much of the related literature is inspired by the technology acceptance model and its heirs. The study presented in this paper adopts an alternative perspective and proposes the study of MDS actual usage patterns under the lens o...

The routing plan of a delivery fleet is usually developed a priori and provides an optimal (or near optimal) way of serving customers by taking into account certain constraints, such as delivery time windows. However, such plans may not cope adequately with the dynamics of a city logistics environment, in which unexpected events (e.g. traffic conge...

The development and availability of new computing and communication devices, and the increased connectivity between these devices, thanks to wired and wireless networks, are enabling new opportunities for people to perform their operations anywhere and anytime. This technological expansion has developed a multitude of challenges that demand further...

Ubiquitous computing enables the development of new innovative applications and services. Particularly influential on future business services will be the connection of the real with the virtual world by embedding computers or smallest processors, memory chips, and sensors into the environment and into physical objects, as well as using natural, mu...

Realisation of the Ubicomp vision in the real world creates significant threats to personal privacy due to constant information collection by numerous tiny sensors, active information exchange over short and long distances, long-term storage of large quantities of data, and reasoning based on collected and stored data. An analysis of more than 100...

Mobile Data Services (MDS) encompass all non-voice value-adding services accessible through mobile networks that are designated to augment end-user experience with mobility and enrich mobile business models. The diffusion path of MDS varies considerably across countries and consumer segments with the Asia Pacific region leading the way and Europe a...

Strategic management research has often emphasised the importance of alliances as efficient structure to develop and commercialise technology-based innovation. The advantage of strategic alliances over the traditional hierarchical and market-like organisational forms has been evident in high-tech markets, featured by high degree of resource specifi...

Pervasive information systems (PIS) constitute an emerging class of information systems (IS) where information technology (IT) is gradually embedded in the physical environment, capable of accommodating user needs and wants when desired. PIS differ from desktop information systems (DIS) in that they provide new means of interaction and can generate...

Studying the adoption and acceptance of mobile data services (MDS) has been an intriguing endeavour for quite some time. Much of the related literature is inspired by the technology acceptance model and its heirs. The study presented in this paper adopts an alternative perspective and proposes the study of MDS actual usage patterns under the lens o...

Mobile broadband internet access and powerful mobile devices make interesting and novel communication applications possible (e.g., recently emerging VoIP applications). Additionally, speech recognition has matured to the point that companies can seriously ...

Every technology should be geared to improve the quality of users' lives. The important pre-requisite is to measure the contribution of the technology to quality of life reliably and validly. This study provides a theoretical and empirical basis for the development of better measures for the contribution of a mobile data service technology to the q...

Every technology should be geared to improve the quality of users' lives. The important pre-requisite is to measure the contribution of the technology to quality of life reliably and validly. This study provides a theoretical and empirical basis for the development of better measures for the contribution of a mobile data service technology to the q...

Distribution schedules designed a priori may not cope adequately with unexpected events that occur during the plan execution, such as adverse traffic conditions or vehicle failures. This limitation may lead to delays, higher costs, and inferior customer service. This chapter presents the design and implementation of a real-time fleet management sys...

Mobile advertising has become one of the most popular applications in mobile commerce, particularly in the form of text advertising through SMS (Short Messaging Service). However, in the study of mobile advertising little is known regarding the effectiveness of SMS advertising and the factors contributing to its success. This research investigates...

Recommender systems represent a class of personalized systems that aim at predicting a user’s interest on information items available in the application domain, operating upon user-driven ratings on items and/or item features. One of the most widely used recommendation methods is collaborative filtering that exploits the assumption that users who h...

Consideration of cost and resource benefits generated from an alliance have prevailed the theoretical and empirical research about strategic alliances and value networks/ webs. As research in the area advances, strategic and financial theories, such as Game Theory and Real Options Theory, set the groundwork for investigating the anticipated strateg...

Abstract Mobile advertising has emerged as one of the most popular applications in mobile commerce, particularly inthe form of SMS advertising campaigns. However, looking at the process of mobile advertising scientific inquiry, one observes that little is known regarding the effectiveness of an SMS advertisement and the factors contributing to its...

Urban distribution plans are typically designed a priori and are static in nature. Hence, they cannot cope with unexpected events that might occur during the plan execution, such as adverse traffic conditions or vehicle failures, thus leading to delays, higher costs and inferior customer service. This paper discusses the design considerations for a...

Knowledge and Information Management (KIM) has existed as a separate field of scientific research for almost a decade. It is therefore surprising that very few studies to date have been concerned with the identification of the scope and boundaries of the field, as well as the sub-topics and research themes that constitute it. This chapter reports o...

A new organizational form which creates an innovative method for the deployment of a wireless communications infrastructure and promotes end-user collaboration has emerged in metropolitan areas all over the world: community-based WLANs. Insofar, research has focused on comparing the community model with commercial offerings of WLAN access and on pl...

Mobile advertising is one of the most popular applications of mobile commerce, particularly in the form of SMS advertising. However, little is known regarding the effectiveness of such campaigns and the factors contributing to their success. In this paper we aim at identifying factors that influence the effectiveness of a mobile messaging advertisi...

Purpose The paper examines the circumstances of success in telematic use and strategic effects resulting from the implementation and use of such technologies from SMEs in the Greek Market. Design/methodology/approach The analysis is based on a three‐phased triangulated research methodology; that is literature review, interviews from 15 logistics d...

Recommender systems are a special class of personalized systems that aim at predicting a user’s interest on available products and services by relying on previously rated items or item features. Human factors associated with a user’s personality or lifestyle, although potential determinants of user behavior are rarely considered in the personalizat...

This paper discusses the development and trial of a Wireless Exhibition Guide that employs mobile, wireless, and indoor positioning technologies to introduce sophisticated information, communication, and navigation exhibition services, thus, leveraging the value proposition of exhibition stakeholders. Results indicate user acceptance of the system...

Strategic alliances are the primary collaboration form for organizations participating in value webs, the most widely used form of structuring business activities in the digital economy. Such alliances can assume many alternative governance modes, ranging from hierarchy-like alliances (joint ventures) to market-like alliances (contractual agreement...

Pervasive Information Systems (PIS) constitute an emerging class of Information Systems where Information Technology is gradually embedded in the physical environment, capable of accommodating user needs and wants when desired. PIS differ from Desktop Information Systems (DIS) in that they encompass a complex, dynamic environment composed of multip...