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This article presents the design and a user experimentation of a multimodal service based on an experimental multimodal platform. It describes the technical realization of the platform and the development of a multimodal service. Lastly, it presents the results of an experimentation with users applying this service. These results show that users prefer multimodal interactions and are more efficient...
We explore some of the characteristics of multimodal input interaction spaces for notification systems within a multi-tasking environment like a command and control center using two promising interaction methods: gestures and touch based input through a laboratory experiment comparing both techniques. Results of our study suggest that gestures are better suited for multi-tasking situations because...
Device-assisted navigation is rapidly becoming a major topic in computer science. PDAs and other small devices are enabling the introduction of navigational assistants to many different spaces. These areas are generally filled with points of interest with which users may choose to interact with. The natural behavior of users in such a space is to explore, interacting with objects the user deems worthy...
The main problem for generating an extractive automatic text summary is to detect the most relevant information in the source document. For such purpose, recently some approaches have successfully employed the word sequence information from the self-text for detecting the candidate text fragments for composing the summary. In this paper, we employ the so-called n-grams and maximal frequent word sequences...
An important issue when evaluating a search tool is the satisfaction that is expressed by its users. While there are many factors that affect satisfaction, we believe that users' expectations affect their evaluation of a query's response, and in turn, their satisfaction. We validate this perspective by measuring individuals' expectation, judgement of response quality, and overall satisfaction for...
As a consequence of various situational and personal factors, programmers use a variety of styles when performing software development and maintenance tasks. In this paper, we develop a contextual framework that links situational, task-oriented, and individual factors to a set of traits. These traits are expressed as behavioural modifiers, and thus, influence one's performance of tasks such as computer...
Designing CSCW systems that support the widely varying needs of targeted users is difficult. There is no silver bullet technology that enables users to effectively collaborate with one another in different contexts. We propose a method of collaborative systems evaluation that enables novice evaluators to make insightful observations about the systems they evaluate at a level comparable to experts...
This paper describes the new concepts of collaborative systems quality evaluation. There are identified structures of collaborative systems. The paper defines the quality characteristics of collaborative systems. There are proposed a metric to estimate the quality level of collaborative systems. There are performed measurements of collaborative systems quality using a specially designed software.
Research on social robots is mainly comprised of research into algorithmic problems in order to expand a robot's capabilities to improve communication with human beings. Also, a large body of research concentrates on the appearance, i.e. aesthetic form of social robots. However, only little reference to their definition is made. In this paper we argue that form, function, and context have to be taken...
This paper presents five exploratory trials investigating scenarios likely to occur when a personal robot shares a home with a person. The scenarios are: a human and robot working on a collaborative task, a human and robot sharing a physical space in a domestic setting, a robot recording and revealing personal information, a robot interrupting a human in order to serve them, and finally, a robot seeking...
The model human cochlea (MHC) is a sensory substitution technique for presenting music as multiple discrete channels of vibrotactile stimuli. The MHC prototype was introduced to a group of deaf senior citizens at a community centre, where they could try the chair, and provide us with feedback about their experience. Preliminary results from this work suggest that the MHC can potentially offer a more...
Theoretical computer science has been occupied with formal methods since the beginning. It has had its share of challenges, though. Often, excessive additional work is required to re-specify applications precisely in a new formalism, so that they can be analyzed algorithmically. With more model-based software engineering, this may have changed. In many instances, specifications are now complete and...
There is an increasing interest in computer-based visualizations to provide insights and ease understandings of complex information. However, many of the proposed visualization tools/techniques seldom find real use in practice. The main reason is that they do not adequately address the issue of easing comprehensibility of underlying information. Through a case study with two static software visualization...
Some authors argue that it can be complicated to build systems with both usability and security, but the reality is that there is no real conflict between these two properties. Certainly, it takes more work to build systems that have the properties of usability and security, but in many cases it is a matter of doing just a good job not miracles. The purpose of this paper is to establish patterns that...
Nowadays, when the evolution of IT tools is faster than ever, the user's needs are evolving even faster. For a software company such a context is difficult to be handled because, within a classical development cycle, the development of an application takes several months or years delivery. A rapid software prototyping could be very useful in those cases helping the user to rethink its needs in terms...
A control methodology for the operation of a hydraulic excavator using a haptic operating device is developed. The main idea is to use position controllers for both the excavator and the operating device where both control loops output the reference position to the other, i.e., two position controlled systems are placed in a feedback loop with each other. The human operator acts as an input disturbance...
This paper proposes improving the usability of HTA (hierarchical task analysis) chart through redefinition. The plans in the existing HTA chart (HTAe) are replaced with symbols giving a proposed representation of HTA chart (HTAs). An empirical experiment was done on both types of chart, the HTAe and the HTAs, to see whether there is an improvement on the usability of HTA chart. An analysis was done...
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