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Automatic prediction of continuous level emotional state requires selection of suitable affective features to develop a regression system based on supervised machine learning. This paper investigates the performance of low-level dynamic features for predicting two common dimensions of emotional state, namely, valence and arousal instantaneously. Low-complexity features are extracted from audio and...
We examined the behavior of teachers in the visualized environment by synchronous CSCL in Active Learning. The following points were considered. •The use of edutab decreased the total amount of teacher speaking by the visualization of the learning state as well as the learning environment. It was found that speaking about objectives decreased, about visualization increased, and about time did not...
Smart boards enable students to learn and explore new concepts using technology to create a more dynamic learning experience. Students become more excited about learning when the smart boards are incorporated into the lesson. Many educators encourage the use of smart boards in teaching and learning. This paper presents a conceptual framework for the use of smart boards among students and teachers...
This paper presents a low cost eye based Human Computer Interface (HCI) developed for amputees and paralyzed persons. The system is a computer interface that provides the functionality of an input device like mouse based on eye actions such as eye blink, eye-gaze and gaze control. For initialization, the subject just holds his/her head still for a few seconds: using involuntary blinks that would naturally...
Proved the superluminal propagation of light pulses is possible in theory and computer stimulation, and discussed the contradiction between the superluminal phenomena and the Special Relativity from three aspects: 1. defects of SR; 2. Special character of SR; 3, Epistemology. Pointed out that superluminal is a natural phenomenon; superluminal transmission of information is certainly possible, in future...
Recently, computer-aided celiac disease diagnosis has been promoted to provide an objective opinion besides histological examination of biopsies and visual assessment of macroscopic mucosal tissue. State-of-the-art techniques, however, are not accurate enough to provide incentive for clinical deployment. In this work, we answer two questions: Do computers and human experts make similar classification...
Historically, eye tracking systems have been a very useful tool for finding salient regions in interfaces that naturally attract the visual attention of users. Scan paths are created as the eye moves from one salient region to another. Research has shown that a relationship exists between scan path direction and cognitive load when navigating a user interface. The analysis of scan paths during interface...
A process graph is a graph designed to visually explain the action of programs which make use of the fork and wait system calls. We outline a tool that automatically generates process graphs for a class of C programs. The key idea behind our tool is to use a program's control flow graph (CFG) to determine its process graph.
In the last two decades the use of technology in art projects has proliferated, as is the case of the interactive projections based on movement used in artistic performances and installations. However, the artists responsible for creating this work typically have to rely on computer experts to implement this type of interactive systems. The tool herein presented, MotionDesigner, intends to assist...
The state-of-the-art image classification methods require an intensive learning stage and a considerable amount of training images. Recently, with the introduction of these models (and in particular convolutional neural network (CNN)), it is believed that the best solution to achieve a system with high performance on scene classification is to learn deep scene features using CNN. While this can be...
Due to advancement in minimization and mass-production, cameras are ubiquitously embedded in most of current mobile devices including phones, vehicles, robots, and augmentedreality displays. These mobile cameras are cheap and can gather in real-time large amounts of streaming data about the surrounding environment. Using an information-theoretic model of a streaming video captured by a mobile camera,...
Programming capabilities are important to the new professionals. Although several initiatives all over the world haves been proposed for teaching programming to people at all levels. Many undergraduate students still fail in the programming courses. Proposed strategies have included visual programming and automatic evaluation of exercises. Nevertheless, there is still a lack of knowledge about students'...
A mobile flying projector is hard to build due to the limited size and payload capability of a micro aerial vehicle. Few flying projector designs have been studied in recent research. However, to date, no practical solution has been presented. We propose a versatile laser projection system enabling in-flight projection with feedforward correction for stabilization of projected images. We present a...
The different strategies for feature extraction and synthesis employed by humans and computers are often complementary, hence combining the two into an integrated object recognition system may considerably improve performance over either used in isolation. Rapid Serial Visual Presentation (RSVP) is one well-established technique that has shown promise integrating human perception into a machine perception...
This paper builds on the authors' previous work with Augmented Reality (AR) technology as a tool to enhance traditional visualizations and facilitate the understanding of complex information. In this paper, we expand our previous work with AR technology by focusing on the process of creating custom content. Based on users' feedback, we describe and compare various strategies to create 3D models from...
Program visualizations help students understand the runtime behavior of other programs. They are educational tools to complement lectures or replace inefficient static drawings. A recent survey found 46 program visualizations developed from 1979 to 2012 reported that their effectiveness is unclear. They also evaluated learner engagement strategies implemented by visualization systems, but other learning...
One of the main difficulties of the literacy process is the question of the spelling of the Portuguese language, which has no regularity in relation to issue of letter-sound conversion. The advancement of technology in the educational environment has become the most dynamic and engaging lessons for students and teachers. The use of natural interfaces makes it the simplest and easiest applications...
To improve the learning process in mathematics, new approaches are needed. Yachay Math is visual and interactive software that has been developed to use on desktop computers, tablets and mobile devices. It is a tool for spatio-temporal reasoning, designed for students to learn mathematical concepts dynamically. Yachay Math provides to teachers a visual approach for mathematics teaching and for the...
This article aims to improve the math learning process in students of rural schools. For this purpose, an educational serious game was developed for use on the web and mobile technologies. The tool was designed using a visual approach so that students reinforce their learning developed in class. The tool was tested and validated by thirty four students and four teachers of two rural schools in Apurímac-Perú...
The traffic between computer networks must be controlled to prevent unauthorized access. Firewall is responsible for filtering data packets between networks, applying rules to select data packets that can get in/out to access the network. The firewall must be configured accordingly network access policy. Therefore, the students have to be trained to acquire skills not only to understand network access...
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