Symmetric Synchronous Collaborative Navigation

Synchronous collaborative navigation is a form of social navigation where users virtually share a web browser. In this paper, we present a symmetric, proxy-based architecture where each user can take the lead and guide others in visiting web sites, without the need for a special browser or other software. We show how we have applied this scheme to a problem-solving-oriented e-learning system

A Framework for Supporting User-Centric Collaborative Information Seeking

Collaboration is often required or encouraged for activities that are too complex or difficult to deal with for an individual. Many situations involving information seeking also call for people working together. Despite its natural appeal and situational necessity, collaboration in information seeking is an understudied domain. The nature of the available information and its role in our lives have changed significantly, but the methods and tools that are used to access and share that information in collaboration have remained largely unaltered. This dissertation is an attempt to develop a new framework for collaborative information seeking (CIS) with a focus on user-centric system designs. To develop this framework, existing practices for doing collaboration, along with motivations and methods, are studied. This initial investigation and a review of literature are followed by a series of carefully created design studies, helping us develop a prototype CIS system, Coagmento. This system is then used for a large scale laboratory experiment with a focus on studying the role and the impact of awareness in CIS projects. Through this study, it is shown that appropriate support for group awareness can help collaborators be more productive, engaged, and aware in collaboration without burdening them with additional load. Using the lessons derived from the literature as well as the set of studies presented in this dissertation, a novel framework for CIS is proposed. Such a framework could help us develop, study, and evaluate CIS systems with a more comprehensive understanding of various CIS processes, and the users of these systems.Doctor of Philosoph

CHORUS Deliverable 2.2: Second report - identification of multi-disciplinary key issues for gap analysis toward EU multimedia search engines roadmap

After addressing the state-of-the-art during the first year of Chorus and establishing the existing landscape in multimedia search engines, we have identified and analyzed gaps within European research effort during our second year. In this period we focused on three directions, notably technological issues, user-centred issues and use-cases and socio- economic and legal aspects. These were assessed by two central studies: firstly, a concerted vision of functional breakdown of generic multimedia search engine, and secondly, a representative use-cases descriptions with the related discussion on requirement for technological challenges. Both studies have been carried out in cooperation and consultation with the community at large through EC concertation meetings (multimedia search engines cluster), several meetings with our Think-Tank, presentations in international conferences, and surveys addressed to EU projects coordinators as well as National initiatives coordinators. Based on the obtained feedback we identified two types of gaps, namely core technological gaps that involve research challenges, and “enablers”, which are not necessarily technical research challenges, but have impact on innovation progress. New socio-economic trends are presented as well as emerging legal challenges

CHORUS Deliverable 2.1: State of the Art on Multimedia Search Engines

Based on the information provided by European projects and national initiatives related to multimedia search as well as domains experts that participated in the CHORUS Think-thanks and workshops, this document reports on the state of the art related to multimedia content search from, a technical, and socio-economic perspective. The technical perspective includes an up to date view on content based indexing and retrieval technologies, multimedia search in the context of mobile devices and peer-to-peer networks, and an overview of current evaluation and benchmark inititiatives to measure the performance of multimedia search engines. From a socio-economic perspective we inventorize the impact and legal consequences of these technical advances and point out future directions of research

Intuitive interaction: Steps towards an integral understanding of the user experience in interaction design

A critical review of traditional practices and methodologies demonstrates an underplaying of firstly the role of emotions and secondly aspects of exploration in interaction behaviour in favour of a goal orientated focus in the user experience (UX). Consequently, the UX is a commodity that can be designed, measured, and predicted. An integral understanding of the UX attempts to overcome the rationalistic and instrumental mindset of traditional Human-Computer Interaction (HCI) on several levels. Firstly, the thesis seeks to complement a functional view of interaction with a qualitative one that considers the complexity of emotions. Emotions are at the heart of engagement and connect action irreversibly to the moment it occurs; they are intettwined with cognition, and decision making. Furthermore, they introduce the vague and ambiguous aspects of experience and open it up to potentiality of creation. Secondly, the thesis examines the relationship between purposive and non-purposive user behaviour such as exploration, play and discovery. The integral position proposed here stresses the procedurally relational nature and complexity of interaction experience. This requires revisiting and augmenting key themes of HCI practice such as interactivity and intuitive design. Intuition is investigated as an early and unconscious form of learning, and unstructured browsing discussed as random interaction mechanisms as forms of implicit learning. Interactivity here is the space for user's actions, contributions and creativity, not only in the design process but also during interaction as co-authors of their experiences. Finally, I envisage integral forms of usability methods to embrace the vague and the ambiguous, in order to enrich HCI's vocabulary and design potential. Key readings that inform this position cut across contemporary philosophy, media and interaction studies and professional HCI literature. On a practical level, a series of experimental interaction designs for web-browsing aim to augment the user's experience, and create space for user's intuition

Interaction history for digital objects

Thesis (Ph.D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts & Sciences, 1999.Includes bibliographical references (p. 139-143) and index.Digital information has no history. When we interact with physical objects, we are able to read the traces left by past interactions with the object. These traces, sometimes called "wear," form a basis for the interaction history of the object. In the physical world, we make use of interaction history to help come up with solutions and guidance. This is not possible in the digital realm, because the traces are missing. This dissertation describes a theoretical framework for talking about interaction history. This framework is related to work in anthropology, ethnomethodology, architecture, and urban planning. The framework describes a space of possible history-rich digital systems and gives properties which can be used to analyze existing systems. The space consists of six properties: proxemic/distemic, active/passive, rate/form of change, degree of permeation, personal/social, and kind of information. We also present an implementation of these ideas in a system called Footprints, a toolset for aiding information foraging on the World Wide Web. Our tools assume that users know what they want but that they need help finding it and help understanding - putting in context - what they have found. Footprints is a social navigation system, designed to show that information from past users can help direct present problem-solvers. We present results from informal use of the tools over the last two years, and from formal surveys and experiments on a controlled task. These experiments showed that people could achieve the same or better results with significantly less effort by using our tools.by Alan Daniel Wexelblat.Ph.D

Direct and indirect effects of post-fire conditions on successional pathways and ecological processes in black spruce-Kalmia forests

The goal of this thesis was to estimate the relative importance of the mechanisms by which forest stands of east-central Newfoundland are replaced by unproductive dwarf-shrub communities following wildfire. Sheep laurel (Kalmia angustifolia L.) is the dominant species of these heath communities and its proliferation after forest fires may initiate a retrogressive pathway rather than forest stand replacement. This problem is addressed in four chapters that evaluate the roles o f differential plant establishment success (Chapters I & II), availability o f limiting resources (Chapter III) and the availability o f canopy cover (Chapter IV) as factors affecting vegetation dynamics following catastrophic fire. The main findings of the research are (1) that at least part of the inhibition pathway is caused by physical limitations on regeneration niches for black spruce and that the biotic process of competition from Kalmia is a less proximate cause o f forest regeneration failure; (2) plant functional diversity and black spruce productivity are restricted spatially and physiologically by patterns in fire severity; (3) burned habitats dominated by Kalmia have suppressed species richness and functional diversity irrespective o f low and high concentrations o f limiting resources; (4) failure o f black spruce to re-colonize these sites and provide cover to Kalmia is associated with measurable reductions in soil microbial activity and herb abundance. A recurring theme among these chapters is the inconsistency between the pattern o f stand retrogression observed in eastern Newfoundland and general theoretical models of succession as they have developed in the ecological literature. As a result of these comparisons, this thesis supports the view that the prevailing models of succession fail to be generalizable across geographic and environmental gradients. In the eastern boreal forest, the factors of fire severity and restriction o f regeneration niches for successional species are the critical aspects of disturbance ecology which are not explicitly accounted for in existing successional models. Until general theories account for forces other than competition that potentially affect community structure, a unified theory of plant succession will remain elusive

Network Narrative: Prose Narrative Fiction and Participatory Cultural Production in Digital Information and Communication Networks

In this study of prose narrative created explicitly for participatory network communications environments I argue that network narratives constitute an important, born-networked form of literary and cultural expression. In the first half of the study I situate network narratives within a rich, dynamic process of reciprocity and codependence between the technological, material and formal properties of communication media on the one hand, and the uses of these media in cultural practices and forms of expression on the other. I point out how the medial and cultural flows that characterize contemporary network culture promote a codependent relation between narrative and information. This relation supports literary cultural expressions that invoke everyday communication practices increasingly shaped by mobile, networked computing devices. In the second half of this study, I extend theoretical work in the field of electronic literature and digital media to propose a set of four characteristics through which network narratives may be understood as distinct modes of networked, literary cultural expression. Network narratives, I suggest, are multimodal, distributed, participatory, and emergent. These attributes are present in distinct ways, within distinct topological layers of the narratives: in the story, discourse, and character networks of the narrative structure; in the formal and navigational structures; and in the participatory circuits of production, circulation and consumption. Attending to these topological layers and their interrelationships by using concepts derived from graph theory and network analysis offers a methodology that links the particular, closely read attributes and content of network narratives to a more distant understanding of changing patterns in broader, networked cultural production. Finally, I offer readings of five examples of network narratives. These include Kate Pullinger and Chris Joseph’s Flight Paths, Penguin Books and De Montfort University’s collaborative project A Million Penguins, the Apple iOS application The Silent History, Tim Burton’s collaboration with TIFF, BurtonStory, and a project by NFB Interactive, Out My Window. Each of these works incorporates user participation into its production circuits using different strategies, each with different implications for narrative and navigational structures. I conclude by describing these distinct strategies as additive participation – participation that becomes embedded within the work itself – and delineating different approaches that are employed independently or in combination by the authors and producers

The factors driving continuance intention to online shopping (e-loyalty): behaviour differences in the case of Saudi Arabia

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University LondonThis study proposes a model of e-shopping continuance intentions that incorporate the revised technology acceptance model and expectation confirmation theory to measure continuance online shopping intentions within Saudi Arabia. Using structural equation modelling to confirm the model fit, and a 463-person sample, the author finds that perceived usefulness, enjoyment, and subjective norms determine online shopping continuance intentions, across male (30% of the sample) and female (70%) respondents. The structural weights are largely equivalent, yet the regression paths from site quality to perceived usefulness and perceived usefulness to continuation intentions are not invariant across the research sample. This research thus moves beyond consideration of online shopping intentions to include factors that may affect online shopping continuance. The research model is able to explain 61% of the variance in intentions to continue shopping online. Therefore, online strategies cannot ignore either direct or indirect differences in continuance intentions due to behaviour differences among shoppers in Saudi Arabia. With the high percentages of participants from the main populated regions in Saudi Arabia, the research model can be generalized across Saudi Arabia. Thus, the research has added to the limited literature on online repurchase intention or continuance intention by testing the proposed model in a context that has never before been tested. Furthermore, few prior studies use SEM as their methodological approach, and even fewer apply invariance analysis to verify behavioural differences based on gender, regional, education, e-shopping experience, and e-shopping spending with a sample obtained from Saudi Arabia. This study addresses these various knowledge gaps. Moreover, this thesis provides managers with useful and important information they can use to plan their Web sites and marketing strategies. The findings will help e-retailers to identify which web site attributes influence consumers’ e-shopping intentions, and thus improve the effectiveness of their e-shopping sites. A more thorough understanding of e-shopping continuance intention helps e-retailers to entice e-shoppers to shop online more, and entice non-online shoppers to shop online. Keywords: Internet shopping, e-shopping, technology acceptance, behavioural differences, continuance intentions, online shopping, Saudi Arabia.Government of Saudi Arabia represented by the Minister of Higher Educatio