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The smart use of the radio spectrum is viable with the use of Cognitive Radio (CR) techniques and Software Defined Radio (SDR) hardware. With that, this project aims to detect and utilize vacant TV channels for secondary users. The lack of spectrum sensing techniques and methods to identify the state of the TV spectrum in a particular time and location is a problem which is delaying the effective...
Increased dependency of the human society on the Electrical Energy, demands extra provision for sophisticated monitoring and control. The Monitoring of the Electrical System involves observing whether all the electrical parameters like voltage, power, current are within the scheduled limits or not and the Controlling of the Electrical System involves the necessary actions that are to be taken if the...
With the world becoming a more mobile place for everyone through the use of smartphones, tablets and laptop computers, the need to help people to get mobile programming skills has never been greater. If anyone wants to become a mobile applications developer, the best approach might just be to learn how to develop and start doing it, and it's "to learn how to develop", the really important...
Approximately more than eight hundred (800) First Year Students at the University of Namibia in 2010 and 2011 were enrolled in Mathematics class against a few teaching staff. As such this resulted in a challenge to individual students' attention, which yielded low passing rate. To improve that, the students in their spare time tried to make use of computer services to revise and practice their Mathematics...
Physical activities play important role in having better health. However, due to the nature of our jobs, most of us have developed sedentary habits and it is very seldom that we find dedicated time for exercise or other physical activities. Sedentary behavior has been identified as an important factor in preventing good health and there is a need to push adults to carry out physical activities regularly,...
Multi-projector systems for VR applications require complex infrastructure composed of several projectors and computers. Management of this complex structure is a challenge and requires expert personnel to keep it operational. In this paper we propose a flexible, mobile, off-the-shelf computing platform, targeted at the development of multi-projector displays algorithms. The goal is to achieve a fast...
In the last decade, on-board computers were continuously substituted by sophisticated in-car-infotainment systems due to the ever increasing demand for mobile services and entertainment features. As a consequence, the automotive user interfaces became more complex and a driver is now faced with the time and attention-consuming task of traversing a menu structure in order to execute a desired functionality...
This paper presents the results of the first phase in a multi-phase study developing an educational fitness application on mobile devices to help combat the growing levels of obesity among youth age 11 to 17. This first phase studies demographic differences across age and gender with regards to physical activities, computer games and mobile technology usage in order to develop an adaptive mobile fitness...
In this paper, we present our efforts related to the implementation of the prototype that utilizes gesture based interaction for supporting collaborative explorations of visualizations in technology-enhanced learning activities. The prototype enables the visualization of different types of geo-tagged content and sensor data collected using mobile devices. In order to test the novelty and interactivity...
This paper describes the prototype design and development of a tele-operated robotic system. The robotic system consists of a robotic arm operating on top of a mobile base system. The robot is constructed using cheap and easily obtainable materials and serves as a platform to test and investigate control techniques and mechanical designs. The robot is controlled via an onboard computer which communicates...
The paper describes a location-aware travel guide prototype that was implemented into a Nokia Symbian Series 60 phone with Location API (JSR-179) support. It contains relevant travelling information that could assist users while they are travelling or when they arrive at a particular destination. The objectives of the study were to discover user preferences towards fisheye and list style menus in...
In mobile networks a service provider needs access to the user data for providing rich and context-aware service like locating the position of mobile user. Mobile assistant (MA) acts as a user data broker network element. Mobile assistant has a complete access to all static and dynamic user data. The purpose of Mobile assistant is to accept requests for user data, to determine user's context, to extract...
A large number of augmented reality (AR) applications have been developed for handheld platforms built around ultra mobile computers. Unfortunately, these platforms, created for research, are not appropriate for demonstrations and user testing because their ad hoc nature affects the user experience. An AR platform designed for the average user will provide more accurate data on software usability...
In this paper we propose "SoTong" system for enhancing family relationship with relation oriented communication. In the relation oriented communications, we focus on the relationship by representation and promotion of relations together with awareness of other's situation for the connectedness and the coexistence. The system captures and analyzes communication channels among modern families...
Today's mobile devices have inherited many of the characteristics of desktop computing -- including the assumptions that the user's full attention and dexterity can be focused on the interface. Unfortunately, on-the-go users are impaired by their mobility and often find desktop-style Windows Icon Menu and Pointer (WIMP) interfaces difficult, if not impossible, to use while performing their primary...
In this paper, we propose a sensor-based interaction for ubiquitous virtual reality (U-VR) systems that users are able to interact implicitly or explicitly with through a sensor. Due to the advances in sensor technology, we can utilize sensory data as a means of user interactions. To show the feasibility of the proposed method, we extend the Composar augmented reality (AR) authoring tool to add support...
Applications of 3 dimensional (3-D) virtual reality are now possible on current mobile phones due to the advances in mobile 3-D graphics technologies. However, the user-interface to these applications is generally still limited to the basic phone keypad which detracts from the sophisticated experience 3-D worlds can provide. In this paper we present a solution to this problem which utilizes the accelerometers...
As ubiquitous virtual reality (U-VR) systems become more and more popular and several systems coexist all together, sharing events between them in order to improve the user experience and increase their scope and functionality will be mandatory. Since U-VR systems have a dynamic and decoupled nature, and they have their own event model, we propose in this paper a semantic publish/subscribe infrastructure...
In the past few years, many new development toolkits such as the Nebula2 and/or mobile technologies including the WiFi or mobileTV have opened up exciting learning opportunities on mobile devices. On top of it, new technologies continue to fuel the rapid growth of newly merged fields of research like the edutainment for educational entertainment. In a recent teaching development project, we have developed...
In this paper, we introduce and evaluate ScaleMesh, a scalable miniaturized dual-radio wireless mesh testbed based on IEEE 802.11b/g technology- ScaleMesh can emulate large-scale mesh networks within a miniaturized experimentation area by adaptively shrinking the transmission range of mesh nodes by means of variable signal attenuators. To this end, we derive a theoretical formula for approximating...
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