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.
A comparative analysis of classification algorithms of iCub platform humanoid hand tactile sensors is presented. The experimental data were analyzed with different learning supervised classification algorithms: Decision Trees Classifiers, k-Nearest Neighbors Classifiers (kNN), and Support Vector Machines (SVM). The best result was obtained with a Gaussian SVM kernel, which allowed 97.4% accuracy using...
This work describes a top level architecture for a general cryptographic process targeting FPGA. This architecture can be implemented for any crypto system, a symmetric or asymmetric process. The architecture allows pipeline implementation on operations. The results measured with Elliptic Curve Cryptography (ECC) presents that this architecture is efficient in FPGA technology and is an option focusing...
An altered feedback system aims to help people that suffer of stuttering and speech fluency disorder. The basic therapy approach is to modify the original voice and to present it back to his/her ear. By hearing the altered signal, he/she thinks someone else is talking the same words together, which results in a natural fluent speech. Our system modifies the voice pitch frequency and reduces background...
We experimentally investigated the effect of the use of a high-resolution 4K tablet on brain activity and physical and mental stress while engaged in searching tasks. The results showed NIRS, an index of nervous system activity, to be significantly higher during searching tasks with 4K content than with 2K content, whereas LF/HF (level of sympathetic nerve activity) and blinking rates during the first...
Many people use on-vehicle information devices on a daily basis. These devices have many useful functions for route guidance, audio services, and gathering traffic information. In addition, smartphones are being used as on-vehicle information devices because of the ubiquity of low-priced applications that can be used.
The development of a tactile sensor based on optical fiber specklegram analysis is reported. The fibers are interposed by deformer plates and the variations on light intensity due to microbending effect are correlated to the normal displacements, yielding 1.9 mm−1 sensitivity. Moreover, the spatial information about applied loads over a 30 × 30 mm2 frame can be retrieved by analyzing the specklegrams...
An automatic and reliable strategy to estimate crowd counting in events or protests is proposed in this paper. Based on 802.11 MAC layer frames, this methodology can be easily deployed using low cost Wi-Fi devices in a stand-alone installation or associated to gold standard crowd counting methods already in use for this purpose. In an experimental test set, the proposed method reached 83.3% of effectiveness...
Nowadays, interaction between smart devices and users has a fundamental role in digital world. Among those smart devices, the TV is becoming an important one. Hence, developing more advanced functionality in TV sets which take in consideration internet usage and connectivity with different devices is fundamental. Across the globe, hybrid television standards are being developed, which are aiming at...
The Internet of Things is emerging as a network to connect any device and objects. In this paper we propose an architecture and implementation of a wireless sensor network using standard IoT protocols. Using CoAP, 6LoWPAN, RPL and 802.15.4 standard, we show an application of monitoring physical characteristics of an indoor environment.
Wireless Ad-Hoc Networks (WANETs) need algorithms and protocols that may provide higher packet delivery throughput for non-structured networks with a high degree of mobility. Moreover, the possibility of reducing the broadcasting packages that will heavily consume power resources on nodes is extremely important. This paper studies the implementation of a modification in the epidemic algorithm, a direction-biased...
This paper presents a mechanism to provide a real-time assessment of voice quality on mobile handled devices. This solution considers the voice degradations caused by the radio frequency channel and packet losses on the IP network. Furthermore, the network architecture of the proposed solution is introduced and the application is implemented on the user mobile device.
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.