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.
Due to the revolutionary developments in computer science and electronics, multiple kinds of new controllers are introduced. Such as eye tracking, voice recognition and hand gesture recognition. But these controller scheme still have their drawbacks. In this paper, we proposed an improved brain-computer interface (BCI) controller based on SSVEP. Our scheme provide good accuracy and comfortable user...
Recent research has illustrated privacy breaches that can be effected on an anonymized dataset by an attacker who has access to auxiliary information about the users. Most of these attack strategies rely on the uniqueness of specific aspects of the users' data - e.g., observing a mobile user at just a few points on the time-location space are sufficient to uniquely identify him/her from an anonymized...
Each node in wireless sensor network has limited energy for communication and computation, so how to reduce the energy consumption efficiently is an important research problem. In this paper, we propose a fully distributed expectation maximization algorithm (FDEM) for acoustic source localization to reduce communication cost significantly. It just requires local data transmission and simple computation...
Wi-Fi-based localization is one of the most promising technologies for indoor location-based services. However, it is still a difficult task to construct a positioning database to provide high accuracy and vast coverage, especially in probabilistic-based algorithms such as fingerprint-based localization. On the other hand, positioning methods that use the location database of the positioning infrastructure,...
In this paper, we present an extension of our concept of the Universal Improvement Scheme (UnIS) investigated in our previous work. The main focus of UnIS is to improve the localization results of unknown wireless nodes, aka mobiles, in the network with prepositioned reference nodes, aka anchors. The UnIS algorithm uses some additional information known a priori about the network. This information...
Localization of wireless ad hoc and sensor networks has gained research attentions for several years. This paper proposes a hybrid localization scheme which exploits Received Signal Strength (RSS)-based ranging and Self Organizing Maps (SOM)-based range free localization methods to obtain the tradeoff between cost, power and location accuracy. By utilizing RSS-based distance estimation and connectivity...
Femtocell is a small sized indoor basestation to increase the coverage and capacity. Femtocell is connected through broadband backhual to the IEEE1588 to synchronize and manage the network. Due to limited/poor connectivity femtocell suffers by frequency misallignment and clock differencs. To overcome this problem MS-Assisted Receiver-Receiver Time Synchronization Strategy has been proposed. But this...
Brain Computer Interface (BCI) research has developed intensively during past years, especially in the assistive technology development for disabled people, e.g. electric wheelchair. This paper will propose our design of the BCI platform for commanding the electric wheelchair simulator. A wireless EEG device is used because of the need for mobile, comfortable, and user-friendly BCI platform. This...
Wireless Sensor Networks (WSNs) have known a tremendous and accentuated development in recent past and in present. Because in almost all applications the sensors must be autonomous, the lifetime of a WSN highly depends on the sensors' energy. The main limitation in designing and developing a WSN is the energy problem since battery replenishment or replacement is difficult or impossible. This paper...
Wavelets have found beneficial applicability in various aspects of wireless communication systems design, including channel modeling, transceiver design, data representation, data compression, source and channel coding, interference mitigation, signal denoising and energy efficient networking. Factorization of compact wavelet matrices into primitive ones has been known for more than 20 years. This...
Brain is the most important part in the human body controlling muscles and nerves; Electroencephalogram (EEG) signals record brain electric activities. EEG signals capture important information pertinent to different physiological brain states. In this paper, we propose an efficient framework for evaluating the power-accuracy trade-off for EEG-based compressive sensing and classification techniques...
Nowadays with the dispersion of wireless networks, smartphones and diverse related services, different localization techniques have been developed. Global Positioning System (GPS) has a high rate of accuracy for outdoor localization but the signal is not available inside of buildings. Also other existing methods for indoor localization have low accuracy. In addition, they use fixed infrastructure...
Routing Protocol for Low Power and Lossy network (RPL) is the underlying routing protocol of 6LoWPAN standard to enable the integration of Wireless Sensor Network on the Internet. Security is an essential requirement for the protocol/standard to be public accepted. One major security issue of RPL is the non-tamper resistant nature of the wireless sensor device, which can make it easy to be compromised...
This paper presents a simple and efficient, fully numerical integration scheme for the accurate evaluation of 4-D reaction integrals in the Method of Moments. The source integral is evaluated by a proper singularity cancellation scheme and the test integral via a quadrature formula specialized for the logarithmic singular behavior of the source integral near source domain boundaries. The proposed...
In factory automation contexts, the localization is an important issue to be considered in order to help industrial monitoring processes, at different layers. This paper shows the study of an innovative localization platform, for industrial environments, based on the IEEE 802.11 technology. The platform can be easily implemented inside an existing communication architecture, introducing several Wi-Fi...
With the ubiquity of WiFi-enabled smartphones, and large-scale access point deployment, WiFi-based localization is one of the most promising indoor localization systems. Existing WiFi localization solutions, however, exhibit high power demand due to the periodic updates required, which raises the barrier for deployment on mobile devices since battery life is a crucial resource. In this paper, we present...
Improvements in underground wireless tracking technology are critical for improved safety and productivity in underground mines. While the recent focus on technology development has been for underground coal mines, improvements are required for block caving operations which have very different characteristics from coal mines. Block caving is characterized by a large number of draw points from which...
Fully mobile and wireless motion capturing is a mandatory requirement for undisturbed and non-reactive analysis of human movements. Therefore, inertial sensor platforms are used in applications like analysis of training sessions in sports or rehabilitation, and allow non-restricted motion capturing. The computation of the required reliable orientation estimation based on the inertial sensor RAW data...
Positioning in wireless environments is crucial for the continuity of rich and mobile multimedia applications. A good position accuracy is particularly difficult to obtain in indoor or mixed indoor-outdoor scenarios. An efficient positioning system must accurately localize any mobile terminal/user in these demanding environments, being at the same time low-cost and easy to deploy. This paper proposes...
Due to high competition in today's business and the need for satisfactory communication with customers, companies understand the inevitable necessity to focus not only on preventing customer churn but also on predicting their needs and providing the best services for them. The purpose of this article is to predict future services needed by wireless users, with data mining techniques. For this purpose,...
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.