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.
Active matrix organic light-emitting diode (AMOLED) displays are being adopted in increasing number of smartphones. Most applications are now based on consistent user interfaces, such as games and instant messaging, and it is therefore crucial to efficiently manage the power consumption of the AMOLED display. To this end, an accurate power model for this type of display is needed. The prior work available...
Mobile cloud computing has dual benefits that includes cloud computing and mobile computing. In mobile cloud computing data storage and data processing take place outside the mobile device. As a result, there is a high chance of security attack. The security even becomes more critical when mobile phone is initiating the handoff during handover management process. Thus, the attacker may easily get...
An Android application (app), called Real Time Range Tracker, was developed as part of a Naval Innovation Science and Engineering program and provides near real-time “line of sight” range between mobile smart devices. In order to properly design tests and analyze test results, the accuracy of the data generated by the app must be fully understood along with any associated measurement uncertainties...
UWB (Ultra Wideband) TOF (Time of Flight) location system is a high accuracy real time indoor location system. It includes many anchors and positioning tags. GDOP (geometric dilution of precision) is an index that used to measures the accuracy of GPS (Global positioning system). In this paper we will study GDOP from the GPS and use GDOP into indoor location system. Researching whether GDOP is a big...
In this paper, we propose a novel range-free localization algorithm tailored for mobile wireless sensor networks (MWSN)s. In contrast to the most existing range- free algorithms, the nodes mobility is taken into accounts when designing our algorithm. We show that nodes are able to estimate their positions using solely their locally-available information, thereby avoiding any unnecessary overhead and...
Positioning in radio networks is a well established research area. The dominating approach has been that positioning algorithms are implemented in the higher levels of the communication system based on position related information derived in the lowest (physical) layer. Examples of measurement include received signal strength (RSS), time of arrival (TOA), angle of arrival (AOA), and fusion and filtering...
This work presents the architecture, modelling, simulation, and physical implementation of a versatile, scalable system for use in common-type waste-bins that can perform and transmit accurate fill-level estimates while consuming minimal power and consisting of low-cost embedded components. The sensing units are based on ultrasonic sensors that provide ranging information which is translated to fill-level...
On validating the performance of small-sized, multi-functionalized and complicated mobile antenna on motherboard efficiently, an improved scheme with combination of the Method of Momentum (MOM) and the Fast Multipole (FMM) is proposed in this paper. The essence of this newly forwarded scheme is apt to categorize the engaged base functions into one near field group and one far field group, the MoM...
Pedestrian position tracking is essential in implementing many of the new location based services in cellular networks. The ability for positioning in non-line of sight (NLOS) environments has made cellular network based positioning highly popular. However, the position estimation fine-tuning step in the current cellular network based positioning algorithm is not utilizing the available information...
It is important for network operators to know how users use the network to plan and design network facilities. In this paper, we propose flow classification method using binned time-series data in consideration of practicality. In this paper, we evaluate the proposed method by using mobile data traffic and show the method can maintain classification accuracy as compared with method using the whole...
The current traditional system of paper documents adopted by Fire Department had lead to the inability of the fire fighters to locate usable and functioning hydrants in an efficient and effective manner which can jeopardize any rescue mission. Hence, there is a need to revised the Fire Department current system and develop a new system that is much more easier, portable and also time and cost effective...
The location of a mobile user is used to deliver context sensitive information like advertisements and deals. Predicting the future possible locations of a mobile user can help target specific services. Nokia provided researchers with data collected from around 200 mobile users over a period of about 2 years for the purpose of research. Previous efforts have attempted either to predict the location...
With the rapid development of the mobile computing and wireless network technology, the mobile telehealth system has been used more and more widely. An important issue of the telehealth system is that too many network traffics are generated while transferring data from the sensors to servers. To solve this problem, we propose a differential algorithm for reducing the network traffics of the telehealth...
This paper studies the Non-Line-Of-Sight condition mitigation issue in mobile subscriber positioning systems by weighting Time-Of-Arrival measures and applying geometrical restrictions. Particularly, this work departs from a more exact characterization of the signal statistics to achieve weighting factors able to reach a more effective mitigation, and consequently a more accurate mobile subscriber...
The comprehensive analysis on historical and real-time big data delivers huge business value, explores business intelligence, and assists in developing marketing strategies. This talk uses traffic information cloud as an example to show how big data is used to improve the accuracy and coverage of traffic information. Taiwan government is investing Traffic Info. cloud services to bring new business...
Three RFID reader based network deployment algorithms (grid-covering, diagonal and mixed) were evaluated in this paper. Experimental results show that the grid-covering method can be used to minimize hardware costs, but it leads to many indeterminate positions. The diagonal method can be used to solve the indeterminate problem, however increases the number of readers, especially in a large tracking...
Recognizing emotions of a user while interacting with smart devices like tablets and mobile phones is a prospective computer vision problem. They are used in a variety of applications like web browsing, multimedia content playing, gaming, etc., involving human interactions. We present an emotion recognition framework that analyze the facial expressions of a mobile phone user, under various real-world...
Convolutional Neural Network (CNN) is efficient in learning hierarchical features from large image datasets, but its model complexity and large memory foot prints are preventing it from being deployed to devices without a server back-end support. Modern CNNs are always trained on GPUs or even GPU clusters with high speed computation capability due to the immense size of the network. A device based...
In recent years, the prevalence of voice disorders has been increasing dramatically, mainly due to unhealthy lifestyles and voice abuse. An impairment in the ability to produce the sound of the voice is indicated by the medical term Dysphonia. This disorder impacts on the quality of life of the population in general, but especially of professional voice users, like teachers or singers, for whom dysphonia...
During the last decade, we have witnessed the prosperity of the Internet-based social platforms and mobile social applications such as Facebook, Twitter, etc. Meanwhile, due to the popularity of mobile terminals such as smart phones and variety of PADs, it is feasible to obtain relatively accurate tempo-spatial data from mobile terminal holders when they visit and upload geo-tagged messages or pictures...
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.