Search results for "User"
showing 10 items of 1060 documents
Evaluation of touchscreen assistive technology for visually disabled users
2017
Touchscreen assistive technology is designed to support speech interaction between visually disabled people and mobile devices, allowing the use of a choreography of gestures to interact with a touch user interface. This paper presents the evaluation of VoiceOver, a screen reader in Apple Inc. products, made in the research project Visually impaired users touching the screen- A user evaluation of assistive technology together with six visually disabled test participants. The aim was to identify challenges related to the performance of the gestures for screen interaction and evaluate the system response to the gestures. The main results showed that most of the hand gestures were easy to perf…
Development of a Hybrid Method to Generate Gravito-Inertial Cues for Motion Platforms in Highly Immersive Environments
2021
Motion platforms have been widely used in Virtual Reality (VR) systems for decades to simulate motion in virtual environments, and they have several applications in emerging fields such as driving assistance systems, vehicle automation and road risk management. Currently, the development of new VR immersive systems faces unique challenges to respond to the user’s requirements, such as introducing high-resolution 360° panoramic images and videos. With this type of visual information, it is much more complicated to apply the traditional methods of generating motion cues, since it is generally not possible to calculate the necessary corresponding motion properties that are needed to …
Studying the feasibility of a recommender in a citizen web portal based on user modeling and clustering algorithms
2006
This paper presents a methodology to estimate the future success of a collaborative recommender in a citizen web portal. This methodology consists of four stages, three of them are developed in this study. First of all, a user model, which takes into account some usual characteristics of web data, is developed to produce artificial data sets. These data sets are used to carry out a clustering algorithm comparison in the second stage of our approach. This comparison provides information about the suitability of each algorithm in different scenarios. The benchmarked clustering algorithms are the ones that are most commonly used in the literature: c-Means, Fuzzy c-Means, a set of hierarchical …
Fostering Teacher-Student Interaction and Learner Autonomy by the I-TUTOR Maps
2014
The paper analyses the use of an automatically generated map as a mediator; that map visually represents the study domain of a university course and fosters the co-activity between teachers and stu- dents. In our approach the role of the teacher is meant as a media- tor between the student and knowledge. The mediation (and not the transmission) highlights a process in which theres no deterministic rela- tion between teaching and learning. Learning is affected by the students previous experiences, their own modalities of acquisition and by the in- puts coming from the environment. The learning path develops when the teachers and the students visions approach and, partly, overlap. In this cas…
SYMBOLIC INTERACTIONS:TOWARDS A COGNITIVE SCIENTIFIC THEORY OF MEANING IN HUMAN TECHNOLOGY INTERACTION
2015
Information technology has perpetuated the role of symbolism in everyday life practice, through its reliance on sign systems for its creation and operation. Increasingly attention has been placed on applying semiotic techniques to analyze user interface design and usability. Surprisingly, although the move towards symbolic interaction has been one of the most striking components of the digital shift, it has proven difficult to build bridges between semiotics and HTI-design thinking. In this article we argue that the problems in linking semiotic analysis of human technology interaction with modern HTI-design paradigms such as usability or user experience arise from a theoretical gap between …
Generación de fractales a partir del método de Newton
2013
[EN] A large number of fractals known, as Julia fractals and Mandelbrot, can be generated from an iterative method. In this paper we present a virtual laboratory developed as a Graphical User Interface (GUI) of Matlab that allows us to study and visualize in real time the relationship between Newton iterative methods of two variables and the generation of fractals. The main objective is to allow Technical School students in Numerical Computation subjects to acquire the skills to generate fractals and interpret their plots in terms of the convergence or divergence speed of the sequence of iterated.
Memorable tourist experiences versus ordinary tourist experiences analysed through user-generated content
2020
Abstract This study aims to test some previously proposed MTE (memorable tourist experience) scales by using UGC (user-generated content) posted in social media sites, through script theory and thematic analysis. In addition, MTEs and OTEs (ordinary tourist experiences) are compared to identify any significant differences between their dimensions. The results suggest that some dimensions of the MTE scale (hedonism, novelty, meaningfulness, involvement, knowledge and serendipity) are significantly more frequently reported in MTEs than in OTEs, but are not exclusive to MTEs. Despite this, the MTE scale dimensions are able with some accuracy to classify tourist experiences as MTEs or OTEs. Thu…
A game for emotional regulation in adolescents: The (body) interface device matters
2016
The aim of this study is to evaluate the role of the type of interface device in the efficacy of a serious game that teaches emotional regulation (ER) strategies in a non-clinical sample of adolescents. We conducted a between-participants experiment in which participants (N = 61) played a frustration induction game, and then an ER game (a breathing strategy game), using one of three types of devices (computer, smartphone, and RGB-D camera). Frustration mood and perceived arousal were the main variables measured. Results revealed a significant interaction between moment (pre-induction phase, post-induction phase, and regulation phase) and the type of interface device used in the frustration …
A Cloud Federation Architecture
2015
Cloud Computing is the state of the art computation paradigm enabling providers to offer computing resources to customers in a pay-per-use fashion. Nowadays public Cloud providers offer similar services within few service models, mainly IaaS and PaaS. Cloud providers give to the user the feeling to dispose of infinite resources, thus having to predict the user requirements in order to provide services with minimal costs, maintaining at the same time high levels of SLAs. In order to achieve this goal, Cloud providers can cooperate together to bring new business opportunities, such as expanding available resources, achieving cost effective asset optimization and adopting power saving policies…
Investigating Customer Satisfaction in a Health Club Context by an Application of the Tetraclasse Model
2006
International audience; Although customer satisfaction is recognised as a key driver for positive organisational outcomes, the nature and the role of the service attributes contributing to satisfaction are still misunderstood, and are most often evaluated by service quality dimensions. This study attempts to explore these attributes and their contribution to satisfaction in a sport service context using Llosa's Tetraclasse model which hypothesises that some service attribute weights are performance related whereas others are not. This application on a sample composed of 184 customers from five French health clubs indicated four satisfaction contribution types. The results suggest that the q…