The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Biopsy of zona pellucida is a necessary step prior to pre-implantation genetic diagnosis (PGD). Besides traversing zona pellucida by applying laser or acidified medium (e.g Tyrode's solution), mechanical means is another safe approach. Traditional mechanical zona cutting requires highly skilled embryologist. It is very difficult to make the process automatic due to its complexity. The process can...
Visual tracking, when regarded as a classification problem, usually need sufficient amount of data for online learning. Current approaches usually employ multiple binary labeled samples to train or update the appearance model at each frame. However, most positive samples collected by perturbation of the target location are equally treated as the estimated target when used for updating. The exact target...
Current legged robots are brittle and fragile when performing a wide range of locomotion tasks. This can be the case during the execution of dynamic locomotion trajectories such as jumping or hopping where impact forces can significantly increase and reach levels of an order of magnitude higher than the gravitational/weight forces of the robot. Legged robots like humanoids with rigid and heavy feet...
In this paper, we present a new image preprocessing method which is based on Wavelet Transform. Before we extract expression texture information, Wavelet transform will be applied to remove partial high frequency information. And then Gabor Transform will be used to extract expression information. At last we chose the Support Vector Machine to classify facial expressions. Experiments on the Japanese...
Map fusion is an essential and challenging issue in multi-robot simultaneous localization and mapping (SLAM), especially for 3D SLAM applications. In this paper, we propose an efficient pose-graph based approach to fuse several 3D maps built by distributed mobile robotic system. Several robots, each equipped with a Kinect sensor, cooperate to map the operated environment; each of them just scans a...
Flying robots have many applications in constrained environments. But they are facing difficulties when they cannot take off again without human intervention if they are not in upright position after a fall. This paper presents a method to design a self-recovery mechanism for the quadrotor to protect itself and recover autonomously after accidental falls. The presented quadrotor with a self-recovery...
This paper concentrates on the gait transition of a quadruped robot. Animals move with different gaits to adapt to the change of terrains or just to save energy. A biomimetic robot should achieve this process in a smooth, continuous and energy efficient way. We propose a gait transition controller that can achieve needed phase difference between every two legs based on the Hopf oscillator. The quadruped...
Unmanned Aerial Vehicles (UAVs) play vital role in a number of application domains including search and rescue, traffic monitoring, border control, to name a few. A robust computer vision system for detecting and tracking moving targets is essential to enable UAVs operate autonomously against challenges such as occlusions and abrupt camera motion. This paper presents a robust system that can handle...
To perform search and rescue missions in multi-terrains after natural disasters, the amphibious robot we designed is equipped with four eccentric paddle modules. The module is based on the epicyclic gear mechanism, and by changing the paddle shaft's location we can achieve various gaits adapting amphibious environment. Regarding experimental results with the first generation prototype, named ePaddle-EGM,...
Snake-like robots are developed for searching and rescuing applications. The digital cameras are commonly installed on the head of the snake-like robots which are used to provide a visual feedback for the operators. However, the swing motion of the head has great impacts on the visual feedback when the snake-like robots perform lateral undulating locomotion. To solve this problem, a control method...
Driver assistance is one of the major tasks on smart wheelchair development. However, human following is also necessary in real application. In this paper, a control system of driver assistance and human following for smart wheelchair is presented. Driver assistance can keep the wheelchair from stairs falling and obstacle collision when the user is driving the wheelchair in complex environments with...
In recent years, a rehabilitation method in which a quadriplegic person can perform training without a therapist has been proposed, and studies that use functional electrical stimulation (FES) have been promoted. However, FES induces muscle contractions that tend to be stronger than voluntary contractions, and hence increases the muscle load too easily. Accordingly, the resultant excessive contractions...
Considering the network restrictions such as multiple time-varying delays, Markov random switching topology, average-consensus sufficient conditions for the multi-agent network systems with time-delay are proposed. Firstly, by using the idea of state decomposition, consensus problem is converted into analysis system stability. And then, by using orthogonal transformation techniques, the original system...
We investigate a model based fault diagnosis method for a four wheel skid steering mobile robot (SSMR). Through this study we use a technique based on structural analysis that allows generating residuals. The research goal is to provide early fault diagnosis. To achieve this we use the kinematic model of the mobile robot that helps to the design of the structural model. The main contribution of this...
Based on the recent research and statistics by Symantec, significant amount of all global web traffic and email traffic is marked as spam. Spambot is basically a robot that maliciously traverses the World Wide Web (WWW), and gathers information, email addresses, etc. For the spammer. The increasing growth of spam bot sophistication advances in the introduction of Spam 2.0, which infiltrate legitimate...
Nowadays, there is a widespread demand for applying the robot system into the various fields. Especially, robot can substitute human and perform the dangerous activity such as search and rescue in the battle field or disaster. We are developing the dual arm robot which can be adapted to the rescue robot with tracked mobile platform. Therefore, it has to be designed to have the protection mechanism...
There is a glaring problem in communication systems when it comes to a decentralized robotic swarm. Since a decentralized swarm would limit the awareness of each agent to its immediate surroundings/neighbors, the exchange of information between agents may now prove to be challenging. An epidemic-based broadcasting technique is then presented to resolve the problem of end-to-end agent communication...
The aim of this paper is to support the idea that not only the robots behaviours, but also development/experience of the participant matters, when teaching a robot. The results presented encourage us to look more closer in the interplay between teacher and learners perspective to create the robots behaviour for a natural interaction. The results, therefore, provide both insights into individual differences...
We all inhabit a continuously changing world where practically neither everything can be known nor can everything be experienced. In order to ultimately survive, diverse ‘context relevant’ chunks of knowledge emerging from one's multiple past experiences have to be ‘connected’ and exploited flexibly in the context of the present to ensure smooth realization of goals. Understanding how the brain achieves...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.