53,500 research outputs found
Content Based Image Retrieval System Using NOHIS-tree
Content-based image retrieval (CBIR) has been one of the most important
research areas in computer vision. It is a widely used method for searching
images in huge databases. In this paper we present a CBIR system called
NOHIS-Search. The system is based on the indexing technique NOHIS-tree. The two
phases of the system are described and the performance of the system is
illustrated with the image database ImagEval. NOHIS-Search system was compared
to other two CBIR systems; the first that using PDDP indexing algorithm and the
second system is that using the sequential search. Results show that
NOHIS-Search system outperforms the two other systems.Comment: 6 pages, 10th International Conference on Advances in Mobile
Computing & Multimedia (MoMM2012
Mobile Apps to improve therapy: the health practitioner in your pocket knows you
Comunicação apresentada no 15th International Conference on Advances in Mobile Computing & Multimedia (MoMM2017), 04-06 December 2017, Salzburg, AustriaThere 1 is an emerging consumer-driven demand for a more
personalised health system and, there is no question, the rapid
evolution of the mobile apps market became an important driver
for personalisation in the health field. The MAiThE (Mobile Apps
to improve ThErapy) project focuses on the deployment and study
of personalised mHealth apps to provide patients and carers with
self-management capabilities to help them feel empowered in
their ability to find strategies in a more informed and collaborative
way, and to optimise therapy outside the clinical context, with
remote support from health practitioners. The insight gathered
with the development and assessment of the apps tailored to the
end-users’ needs will result in a conceptual model to guide in the
development of future mHealth apps. The project will produce an
impact study based on thorough apps evaluations conducted on
the field with participants from different contexts.N/
Effect of oil palm empty fruit bunches (OPEFB) fibers to the compressive strength and water absorption of concrete
Growing popularity based on environmentally-friendly, low cost and lightweight building materials in the construction industry has led to a need to examine how these characteristics can be achieved and at the same time giving the benefit to the environment and maintain the material requirements based on the standards required. Recycling of waste generated from industrial and agricultural activities as measures of building materials is not only a viable solution to the problem of pollution but also to produce an economic design of building
Understanding user experience of mobile video: Framework, measurement, and optimization
Since users have become the focus of product/service design in last decade, the term User eXperience (UX) has been frequently used in the field of Human-Computer-Interaction (HCI). Research on UX facilitates a better understanding of the various aspects of the user’s interaction with the product or service. Mobile video, as a new and promising service and research field, has attracted great attention. Due to the significance of UX in the success of mobile video (Jordan, 2002), many researchers have centered on this area, examining users’ expectations, motivations, requirements, and usage context. As a result, many influencing factors have been explored (Buchinger, Kriglstein, Brandt & Hlavacs, 2011; Buchinger, Kriglstein & Hlavacs, 2009). However, a general framework for specific mobile video service is lacking for structuring such a great number of factors. To measure user experience of multimedia services such as mobile video, quality of experience (QoE) has recently become a prominent concept. In contrast to the traditionally used concept quality of service (QoS), QoE not only involves objectively measuring the delivered service but also takes into account user’s needs and desires when using the service, emphasizing the user’s overall acceptability on the service. Many QoE metrics are able to estimate the user perceived quality or acceptability of mobile video, but may be not enough accurate for the overall UX prediction due to the complexity of UX. Only a few frameworks of QoE have addressed more aspects of UX for mobile multimedia applications but need be transformed into practical measures. The challenge of optimizing UX remains adaptations to the resource constrains (e.g., network conditions, mobile device capabilities, and heterogeneous usage contexts) as well as meeting complicated user requirements (e.g., usage purposes and personal preferences). In this chapter, we investigate the existing important UX frameworks, compare their similarities and discuss some important features that fit in the mobile video service. Based on the previous research, we propose a simple UX framework for mobile video application by mapping a variety of influencing factors of UX upon a typical mobile video delivery system. Each component and its factors are explored with comprehensive literature reviews. The proposed framework may benefit in user-centred design of mobile video through taking a complete consideration of UX influences and in improvement of mobile videoservice quality by adjusting the values of certain factors to produce a positive user experience. It may also facilitate relative research in the way of locating important issues to study, clarifying research scopes, and setting up proper study procedures. We then review a great deal of research on UX measurement, including QoE metrics and QoE frameworks of mobile multimedia. Finally, we discuss how to achieve an optimal quality of user experience by focusing on the issues of various aspects of UX of mobile video. In the conclusion, we suggest some open issues for future study
A software-defined architecture for next-generation cellular networks
In the recent years, mobile cellular networks are undergoing fundamental changes and many established concepts are being revisited. New emerging paradigms, such as Software-Defined Networking (SDN), Mobile Cloud Computing (MCC), Network Function Virtualization (NFV), Internet of Things (IoT),and Mobile Social Networking (MSN), bring challenges in the design of cellular networks architectures. Current Long-Term Evolution (LTE) networks are not able to accommodate these new trends in a scalable and efficient way. In this paper, first we discuss the limitations of the current LTE architecture. Second, driven by the new communication needs and by the advances in aforementioned areas, we propose a new architecture for next generation cellular networks. Some of its characteristics include support for distributed content routing, Heterogeneous Networks(HetNets) and multiple Radio Access Technologies (RATs). Finally, we present simulation results which show that significant backhaul traffic savings can be achieved by implementing caching and routing functions at the network edge
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