1,721,016 research outputs found
Resource-Based Models of Visual Interaction: Learning from Errors
No full textWe propose a resource-based model of human-computer interaction, and discuss how WIPPOG, a rule-based language for multiset transformations, can support such a model. WIPPOG is here adopted as an enactment mechanism for task models expressed by a visual notation. We exploit this resource-based perspective to model some common interaction errors and suggest possible prevention and mitigation strategies
Proceedings of the Working Conference on Advanced Visual Interfaces AVI 08
No full textThe 9th edition of the Working Conference on Advanced Visual Interfaces, (Naples on May 29--31 2008), follows in the tradition of previous editions, in hosting an impressive collection of contributions on the most diverse topics related to interaction, from design of interactive environments to new multi-touch interaction, from information visualization to presentation layout, from exploration of virtual spaces, to provision of services based on localisation in the real world, to name just a few.
The main categories proposed for this edition of AVI were Interaction models and techniques, Interactive visualization, Interactive systems, and User interaction studies, and we were most pleased with a very good response from the interaction community on all of these subjects. We received 117 full papers, 36 poster papers and 18 demo papers.
Each paper, independently of the category, was reviewed by 3 members of the Programme Committee, and in cases of controversy, discussions among the reviewers and with the Program Chairs ensued. In particular, the Demo Chair Phil Cox was instrumental in promoting and setting up the demo programme. The Programme Committee members were particularly attentive on evaluating both experimental and conceptual support for the statements in the papers and in many cases proposed effective ways to revise the papers In the end, 32 submissions were accepted as oral presentations, 42 as poster presentations, and 12 as demo presentations. All these contributions are included in these Proceedings.
We think that this collection of works is a good representative of both the state of the art and of the vitality of the community interested in interaction at large, and we are proud to see many returning authors, who see AVI as the natural venue for disseminating their new ideas, as well as many new researchers, who test their achievements in a harsh competition. We hope to see more and more of these categories of authors in future AVIs.
The scientific programme of AVI 2008 is completed by 3 excellent invited speeches, two tutorials and two workshops. This is the right place to acknowledge the contribution of all those who helped make AVI a successful event once again
Evaluating web sites: exploiting user's expectations
No full textA new goal-based approach to measure usability of web sites is presented, strongly taking into account the customers' expectations, which are often hardly foreseeable as a whole. After a general discussion on web site design issues, we present a short survey of evaluation methods currently used for web sites. We next introduce a new taxonomy of site categories in a three-dimensional space, derived from Aristotle's rhetorical triangle, including different aspects of the site designer's goals. In our approach, we use this taxonomy to identify a number of sites belonging to the same category, in order to carry out a comparative analysis of their features. This analysis is the basis for a two-shot generation of a form for the evaluation of that category of sites. In the first shot, the users fill a generic evaluation form, acquainting them with sites characteristics. They are next asked to perform specific tasks of their choice, according to what they expect from a site of the given category. They note their impressions and list those features they found useful, the analysis of their comments is exploited to formulate statements specific to the given category, to be added to the initial form (second shot). We found that the responses to the second, expanded form, provide more comprehensive criteria for site evaluation, and turn helpful to precisely locate flaws in site functionalities. After testing, our methodology has proved very promising and may be applied for the evaluation of any other site category, most of all those providing a set of special services. (C) 2003 Elsevier Ltd. All rights reserved
Languages, tasks and roles: modeling interaction through resources
No full textVisual interaction involves different types of resources, both at the computational and at the human end of the interaction loop. The roles played by resources, with respect to the development of interactive tasks, are also discussed
CoOL-Room – Collaboration Oriented Learning Room
No full textWe present a system supporting synchronous
distance multimedia collaboration. Such systems
require a number of tools to communicate, enforce
collaboration awareness and maintain consistency of
shared objects. We introduce the main requirements to
provide virtual room facilities, and present our
implementation comparing it to other systems
Proceedings of the Working Conference on Advanced Visual Interfaces - AVI 2002
No full textWe are faced everyday with an enormous amount of information: from television, from the newspapers, from the web, at the same time we also own a number of personal gadgets: cellular phone, personal and portable computers, personal assistants...yet we have difficulties in filtering, highlighting and using the information we really need.
When users search specific information on the web, very often they run into difficulties and find other types of data (perhaps even interesting) but different from the ones they were searching. In a world where communication is one of the most important issues for succeeding in life (sitting for exams, undergoing a hiring interview, writing reports and, above all, interacting with others) we all need good interfaces - not only between humans and programs, but more often than not, between different kinds of humans. The Mid-East crisis is a very good example, unfortunately.
We have been organizing the AVI International Workshops having - at the back of our minds - the idea that no application program may be really successful if its corresponding interface is not geared towards human capabilities. Usability studies have proved, in a number of cases, that if the user does not participate in the design process of a system (and of its interface) it is very unlikely that such system will meet the user's needs. Due to such experience in the design and evaluation of interfaces, we feel that there are important issues to be discussed like the relevance of the cultural background of users, the different information interaction strategies, the conditions and constraints of attention focusing, the design and evaluation of visual tools for improving understandability, learnability and plain usage.
The invited speakers of the AVI '02 edition in Trento are well known in the area of interface design and will provide us with their insight and forecasting of what is round the corner in the next years pertaining to the above subject. The accepted papers (less than one out of three) report on very recent work using a variety of technologies like virtual reality, information visualization, icon design...whilst the system papers that will be demonstrated give us a glance at potentially new applications for improving human computer interaction, for increasing multimodality and even pioneering musical interfaces
Successful Visual Human-Computer Interaction is Undecidable
No full textWe propose a model of visual interactive computing and define a family of visual languages which abstract some of its features. We prove that the problem whether or not successful communications exist is not decidable. (A human-computer communication by means of a visual language is successful when all human commands, in the form of pictures composed of icons, are correctly interpreted and answered by the computer.) The proof makes use of a codification of the Post Correspondence Problem by means of icons and pictures. This result warns about possible limitations of a purely algorithmic treatment of interactive computing via visual language
Image retrieval using resegmentation driven by query rectangles
No full textImage retrieval using pictorial attributes such as color, position, and shape is a topic of vigorous research. We address two key issues in image retrieval: the use of rectangles in queries to express properties of regions in the desired target images, and the use of oversegmentation to build the index of images in the database. In our method, the rectangles in the user's query are used to control a partial resegmentation of each candidate image. These query-driven, partial resegmentations provide the features needed for determining the distance between the query and each candidate, so that the closest candidates can be determined and retrieved. This method enables the construction of image retrieval systems with completely automatic indexing and relatively fast querying time. We show results of both qualitative and performance tests. (C) 2003 Published by Elsevier B.V
Working Conference on Advanced Visual Interfaces - AVI 2012 - In cooperation with ACM-SIGCHI, ACM-SIGMM, SIGCHI Italy.
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