Objective metrics are widely used to estimate the perceived quality of audio and video content in consumer electronics applications. Although a number of such metrics exist, they have all been developed for the unimod...
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The growth of communication and information technology pushes for changes on how information is obtained or sent, and brings new interaction models. Convergence and elasticity provided by the cloud may foster changes ...
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The growth of communication and information technology pushes for changes on how information is obtained or sent, and brings new interaction models. Convergence and elasticity provided by the cloud may foster changes in how people interact with computers. Despite cloud computing is revamping research in many computing areas, few studies are found about the social implications of this new computational model and how the human-cloud interaction will be. This paper intends to present some interaction concerns inherent to human-cloud interaction.
In this paper, we investigate the effects of viewing conditions and rotation methods on different types of collaborative tasks in a tabletop AR environment in which two users are co-located. The viewing condition mean...
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ISBN:
(纸本)9781424462582
In this paper, we investigate the effects of viewing conditions and rotation methods on different types of collaborative tasks in a tabletop AR environment in which two users are co-located. The viewing condition means how the manipulation of a tabletop world by one user is shown in the other users' view and the rotation method means what type of input devices is used to rotate the tabletop world for alternative orientations. Our experiment considered two different viewing conditions-consistent view and inconsistent view and two different rotation methods-direct turn and indirect turn. In the experiment, a 3D display environment called "Stereoscopic Collaboration in Augmented and Projective Environments (SCAPE)" was utilized as a test environment, and two tasks were considered: Lego-like block building task and text label selection task. The former was designed for synchronous and referring-strong type, and the latter was designed for asynchronous and orientation-strong type. As dependent variables, various objective and subjective measurements including task completion time, quality of task result, turn angle, and questionnaire were measured. According to the results, the viewing conditions had significant effects on several objective and subjective measurements. On task completion time, their effect for the synchronous task was opposite to that for the asynchronous task. On the other hand, the rotation methods had significant effects only on turn angle.
Despite the advances of computer systems, there are still few alternatives of help systems. New paradigms are needed because the possibilities of help systems are still poorly explored both by end users and by the des...
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Despite the advances of computer systems, there are still few alternatives of help systems. New paradigms are needed because the possibilities of help systems are still poorly explored both by end users and by the designers. This paper explores research on help systems, based on a new paradigm: the dialogue between the user and the system. From this research emerged an approach to reduce their communication gaps and transform that communication into something closer to a natural dialogue.
In this paper we present the SMART tool. SMART allows designers of collaborative systems to describe the proposed users' communicative model for the system being designed. It analyzes this model and provides quali...
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In this paper we present the SMART tool. SMART allows designers of collaborative systems to describe the proposed users' communicative model for the system being designed. It analyzes this model and provides qualitative indicators of potential social impacts the system may bring to its users. SMART is based on the architecture model proposed by Manas and Semiotic Engineering theory.
One approach for suiting the diverse and mutable interaction requirements is to tailor interfaces according to the users' preferences or needs. Although literature regarding tailoring presents results with diverse...
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One approach for suiting the diverse and mutable interaction requirements is to tailor interfaces according to the users' preferences or needs. Although literature regarding tailoring presents results with diverse foci, there has been a lack of works considering methods and techniques to support designers in their practice. This paper presents a practical approach to elicit and formalize the tailorable behavior making interactive systems more flexible. The elicitation of the different possible interfaces is performed with users' participation and the tailorable behavior is formalized with a norm-based structure. A case study is described as well as the evaluation with final users.
This research is a study related to the application of Information Architecture (IA) principles to the interface of e-book readers. The four basic Information Architecture principles proposed by Morville and Rosenfeld...
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This research is a study related to the application of Information Architecture (IA) principles to the interface of e-book readers. The four basic Information Architecture principles proposed by Morville and Rosenfeld (2006) and the methodology developed by Camargo and Vidotti (2010) are applied. The work is based on case studies and experimental research. The literature review will include research in scientific journals on the field of Information Science and Computer Science, and other information resources such as books, Websites, and scientific events.
The Semiotic Engineering theory of human-Computer Interaction defines epistemic tools as those that allow the designer to reflect about the problem space and available solutions when designing an interactive system. T...
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The Semiotic Engineering theory of human-Computer Interaction defines epistemic tools as those that allow the designer to reflect about the problem space and available solutions when designing an interactive system. Thus, Semiotic Engineering points out to the importance of offering designers such tools. In this context, Manas was proposed as an epistemic tool that can support designers' of collaborative systems in identifying and reflecting (at design time) about potential social impacts the system may have on a group of users. In this paper we present the first evaluation of Manas' use at design time. The results of this evaluation illustrate how Manas can support designers reflection about the system's social impact on user, and its contribution. It also indicates the costs involved in learning and using the proposed model.
For many people television is still the main form of entertainment. It is a kind of entertainment which is becoming less passive, to the extent that new technology is being applied to the area, especially with digital...
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For many people television is still the main form of entertainment. It is a kind of entertainment which is becoming less passive, to the extent that new technology is being applied to the area, especially with digital TV and viewers are changing the way they watch TV. In this new scenario, a new TV, digital, interactive, lets the viewers shop, take part in surveys, send emails, among other facilities, through the remote control. These possibilities bring new challenges, including the provision of interfaces that enable users to enjoy the offered features. The digital interactive TV must minimize barriers and promote accessibility to different types of audiences, including the users who have some trouble to understand the broadcast content. In this paper, through a pilot case study, it was possible to analyze a group of users and the existence of difficulties to understand the transmitted content. These difficulties are presented in different levels and depend on several factors, including cultural and educational factors. Suggestions for this public accessibility may be provided using additional content to television programs. The use of such content lets users to take advantage of the programs as they become more enjoyable and profitable.
Health risk analysis to the contaminated water involves the use of mechanistic models that include many uncertain and variable parameters. Currently, the uncertainties of risk analysis models are treated using statist...
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ISBN:
(纸本)9788890357411
Health risk analysis to the contaminated water involves the use of mechanistic models that include many uncertain and variable parameters. Currently, the uncertainties of risk analysis models are treated using statistical theories considering the randomness in data distribution. However, not all uncertainties in data or model parameters are due to randomness. Other sources of imprecision that may lead to uncertainty include scarce or incomplete data, measurement error or subjective interpretation of available information. These kinds of uncertainties cannot be treated solely by statistical methods. This paper uses fuzzy set theory (FST) together with probability theory (PT) to incorporate uncertainties into risk analysis model. Based on the form of available information, FST, PT, or a combination of both is used to incorporate parameter uncertainty and variability into risk assessment models. The pollutants concentration, cancer and non-cancer risk potency factors are highly uncertain parameters in risk analysis model and treated as fuzzy variables while the remaining model parameters are treated as random or constant function. Triangular fuzzy function (TFN) is integrated with random variables at different alpha-cut levels to produced cumulative distribution function (CDF) of individual's risk. The methodology is explained through a case study related to the human health risk posed by produced water discharge from petroleum industries.
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