This thesis deals with the use of sound in interactions in the context of participatory systems and data sonification. We investigate an interactive environment where participants perceive... Show moreThis thesis deals with the use of sound in interactions in the context of participatory systems and data sonification. We investigate an interactive environment where participants perceive information of the data through sound elements. To define the interactive process, we employ the dialogue model, breaking it down into three components: subject, verbal, and adjective. This supports the purpose of having a better understanding of the topics addressed in this thesis: i.e., interaction models, data sonification, interaction & design, and evaluation of data sonification. Moreover, it contributes new findings and perspectives to these topics. Show less
In recent years, several deep learning models have been proposed to accurately quantify and diagnose cardiac pathologies. These automated tools heavily rely on the accurate segmentation of cardiac... Show moreIn recent years, several deep learning models have been proposed to accurately quantify and diagnose cardiac pathologies. These automated tools heavily rely on the accurate segmentation of cardiac structures in MRI images. However, segmentation of the right ventricle is challenging due to its highly complex shape and ill-defined borders. Hence, there is a need for new methods to handle such structure's geometrical and textural complexities, notably in the presence of pathologies such as Dilated Right Ventricle, Tricuspid Regurgitation, Arrhythmogenesis, Tetralogy of Fallot, and Inter-atrial Communication. The last MICCAI challenge on right ventricle segmentation was held in 2012 and included only 48 cases from a single clinical center. As part of the 12th Workshop on Statistical Atlases and Computational Models of the Heart (STACOM 2021), the M&Ms-2 challenge was organized to promote the interest of the research community around right ventricle segmentation in multi-disease, multi-view, and multi-center cardiac MRI. Three hundred sixty CMR cases, including short-axis and long-axis 4-chamber views, were collected from three Spanish hospitals using nine different scanners from three different vendors, and included a diverse set of right and left ventricle pathologies. The solutions provided by the participants show that nnU-Net achieved the best results overall. However, multi-view approaches were able to capture additional information, highlighting the need to integrate multiple cardiac diseases, views, scanners, and acquisition protocols to produce reliable automatic cardiac segmentation algorithms. Show less
We have designed an interactive form of sonification in which the listener navigates through the molecular structures of amino acids over the network of carbon atoms. We use pitch and density as... Show moreWe have designed an interactive form of sonification in which the listener navigates through the molecular structures of amino acids over the network of carbon atoms. We use pitch and density as the two main features for the sound design of the four common chemical elements (H, C, N, O). We use multiple concurrently sounding sources to spatially sonify the atoms around a certain carbon atom of the amino acids. The main goal of this paper is to evaluate this sonification approach. We cover the design, execution and evaluation of two separate cycles of experiments that aim to evaluate our sonification approach and get insight in factors that may influence the individual performance of the concurrently sounding source identification and localization. Show less
We are interested in sonifying the molecular structures of amino acids. This paper describes the context and the first design choices for our approach. So far, we believe an amino acid molecule is... Show moreWe are interested in sonifying the molecular structures of amino acids. This paper describes the context and the first design choices for our approach. So far, we believe an amino acid molecule is too complex to be perceived at once. Therefore, we have designed an interactive form of sonification in which the listener navigates through the molecule over the network of carbon atoms. We describe our different approaches and discuss the topic of immediacy: the time it takes to recognize the structure surrounding the listenerメs position while navigating. Furthermore, we touch upon the question how many atoms we can sonify simultaneously and the role auditory masking plays in this context. To overcome auditory masking, we propose to use irregular but easy to recognize sounds. We conclude with an interest in a three-dimensional navigation environment using general molecular structures for further research and development. Show less
In this paper, we study the scheduling problem of the imprecise mixed-criticality model (IMC) under earliest deadline first with virtual deadline (EDF-VD) scheduling upon uniprocessor systems. Two... Show moreIn this paper, we study the scheduling problem of the imprecise mixed-criticality model (IMC) under earliest deadline first with virtual deadline (EDF-VD) scheduling upon uniprocessor systems. Two schedulability tests are presented. The first test is a concise utilization-based test which can be applied to the implicit deadline IMC task set. The suboptimality of the proposed utilization-based test is evaluated via a widely-used scheduling metric, speedup factors. The second test is a more effective test but with higher complexity which is based on the concept of demand bound function (DBF). The proposed DBF-based test is more generic and can apply to constrained deadline IMC task set. Moreover, in order to address the high time cost of the existing deadline tuning algorithm, we propose a novel algorithm which significantly improve the efficiency of the deadline tuning procedure. Experimental results show the effectiveness of our proposed schedulability tests, confirm the theoretical suboptimality results with respect to speedup factor, and demonstrate the efficiency of our proposed algorithm over the existing deadline tunning algorithm. In addition, issues related to the implementation of the IMC model under EDF-VD are discussed. Show less
Zhang, Z.; Ivison, R.J.; George, R.D.; Zhao, Y.; Dunne, L.; Herrera-Camus, R.; ... ; Werf, P.P. van der 2018