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Protein crystallization experiments require the inspection and analysis of a large number of crystal images. So, manual inspection of these images is very inefficient and might risk missing successful results. Visual-X2 is a tool developed to aid the user for quick and efficient visualization and analysis of the results of the experiments. In this paper, we discuss various features of Visual-X2 and...
Natural language questions are inherently compositional, and many are most easily answered by reasoning about their decomposition into modular sub-problems. For example, to answer “is there an equal number of balls and boxes?” we can look for balls, look for boxes, count them, and compare the results. The recently proposed Neural Module Network (NMN) architecture [3, 2] implements this approach to...
The profusion of embedded information and communication technologies makes them increasingly used in educational processes. Through convergent media in the digital world and its different approaches, new possibilities for education emerge. It is sought from the qualitative approach and the exploratory and descriptive study, this article present possibilities to incorporate transmedia strategies, into...
Previous works have suggested the role of scene information in directing gaze. The structure of a scene provides global contextual information that complements local object information in saliency prediction. In this study, we explore how scene envelopes such as openness, depth, and perspective affect visual attention in natural outdoor images. To facilitate this study, an eye tracking dataset is...
This work aims to present the planning, development (methodology) and implementation (technologies used) of the learnning object (LO) SegurIdade Virtual, as well as highlighting the learning experiences with the object. The material was built in game format and seeks to develop, in a playful way, the critical thinking of the elderly public for the safe use of the internet. The object was builded based...
The current search task is gradually turning from traditional information retrieval to exploratory search. In view of the space and interactive constraints on the vertical list of search boxes for prompt keywords, this paper designs and implements a visualization method of the spherical tag cloud for prompt keywords list. Firstly, the method of generating the keywords is analyzed, and a simple organization...
It is sometimes a challenge to access to specific skills assessments and training programs for children with special needs. In the case of visual perception, and more specifically eye-motor coordination, methods like the Frostig one are not adapted to all children. In this paper, we present a two steps co-design process with therapists and children in order to come up with an alternative solution...
Modern ASIC and FPGA based embedded products use model based design, in which both hardware and software are developed in parallel. Previously HW was completed first and the information handed over to SW team, typically in the form of register tables. The information was even manually copied to SW code, making any changes error-prone and laborious. IP-XACT is the most feasible standard to model HW...
Packing and layout problems belong to NP-Complete problems theoretically and they occur extensively in many engineering fields in practice. Artificial fish swarm algorithm (AFSA) is a newly proposed promising swarm intelligent optimization algorithm. Therefore we try to apply this novel intelligent algorithm to solving packing and layout problems. But there still exist some defects of this algorithm...
Timeseries line charts are a popular visualization technique but traditionally do not show many lines. We borrow concepts of tiny microtext and path dependent cartographic text to embed labels and additional text directly into lines on line charts, thereby making it easier to identify individual lines in a congested line chart, enabling more lines to be displayed and enabling additional data to be...
This paper presents a novel technique for combining 2D and 2.5D treemaps using multi-perspective views to leverage the advantages of both treemap types. It enables a new form of overview+detail visualization for tree-structured data and contributes new concepts for real-time rendering of and interaction with treemaps. The technique operates by tilting the graphical elements representing inner nodes...
Spatial relationships between objects provide important information for text-based image retrieval. As users are more likely to describe a scene from a real world perspective, using 3D spatial relationships rather than 2D relationships that assume a particular viewing direction, one of the main challenges is to infer the 3D structure that bridges images with users text descriptions. However, direct...
We introduce a novel strategy for learning to extract semantically meaningful features from aerial imagery. Instead of manually labeling the aerial imagery, we propose to predict (noisy) semantic features automatically extracted from co-located ground imagery. Our network architecture takes an aerial image as input, extracts features using a convolutional neural network, and then applies an adaptive...
Trees and graphs are two data structures that are commonly used in representing different kinds of data. They also have many associated algorithms taught in different courses. It is thus beneficial to have a tool that could be used by students, teachers and programmers to visually trace how their algorithms work. The work in this paper presents, CHR-Graph, an easy-to-use platform for animating trees...
Energy based algorithms are powerful techniques for laying out graphs. They tend to generate aesthetically pleasing graph embeddings, exhibiting symmetries and community structures. When dealing with large graphs, an important drawback of these algorithms is to produce embeddings where many nodes overlap, leading to cluttering issues. While several approaches have been proposed for node overlap removal...
Dynamic graphs are typically represented in a time-to-space mapping with the goal to preserve the mental map in order to reduce cognitive efforts for comparison tasks. Such a mapping from time to space has the general drawback that space limitations are sooner reached than in corresponding time-to-time mappings to which graph animation belongs. Consequently, to get an overview about the dynamics in...
A weighted free tree is an undirected connected graph with no cycles whose edges and nodes have weights (positive real numbers). The purpose of our research is to support the comparative analysis of weighted free trees. The fundamental categories of visualization techniques that support comparison are juxtaposition, superposition, and explicit encoding. Juxtaposition is often used for comparison....
The exploration of moderately dense networks is used in various challenges of visual data analysis. Frequently, the solutions lay in graph drawing, based on automatic forcedirected layout, which results in a spontaneous and irreproducible node-link diagram. Currently available approaches to improve its readability are generally oriented to finite rendering without providing to the analyst handy tools...
Partially drawn links are a possibility to reduce visual clutter in node-link visualizations of relational data caused by link crossings. Although partial links have some benefits concerning task performance, they exhibit issues regarding target node ambiguities. In this paper, we provide the results of a user study that investigates the performance in terms of task accuracy when judging target nodes...
We investigate the problem of analyzing word frequencies in multiple text sources with the aim to give an overview of word-based similarities in several texts as a starting point for further analysis. To reach this goal, we designed a visual analytics approach composed of typical stages and processes, combining algorithmic analysis, visualization techniques, the human users with their perceptual abilities,...
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