Keita Matsuo

A comparison study for two fuzzy-based systems: improving reliability and security of JXTA-overlay P2P platform

The reliability of peers is very important for safe communication in peer-to-peer (P2P) systems. The reliability of a peer can be evaluated based on the reputation and interactions with other peers to provide different services. However, for deciding the peer reliability there are needed many parameters, which make the problem NP-hard. In this paper, we present two fuzzy-based systems (called FBRS1 and FBRS2) to improve the reliability of JXTA-overlay P2P platform. In FBRS1, we considered three input parameters: number of interactions (NI), security (S), packet loss (PL) to decide the peer reliability (PR). In FBRS2, we considered four input parameters: NI, S, PL and local score to decide the PR. We compare the proposed systems by computer simulations. Comparing the complexity of FBRS1 and FBRS2, the FBRS2 is more complex than FBRS1. However, it also considers the local score, which makes it more reliable than FBRS1.

A multi-modal simulation system for wireless sensor networks: a comparison study considering stationary and mobile sink and event

The wireless sensor networks (WSNs) are a sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment and in our physical and cyber infrastructure. In order to simulate WSNs, we implemented a simulation system. We implement our system as a multi-model system considering different topologies, radio models, routing protocols and number of nodes. In this work, we consider the goodput, depletion and delay metrics to evaluate the performance of WSNs for AODV and DSR routing protocols considering TwoRayGround and Shadowing radio models, lattice and random topologies, and different number of nodes. We investigate the performance of WSNs for stationary and mobile sink, and stationary and mobile event. The simulation results have shown that for both stationary and mobile sinks, the goodput decreases with the increase of number of sensor nodes. In the case of mobile sink, the goodput is stable and better than in case of stationary sink, especially when the number of nodes is increased. In case of mobile sink, the consumed energy is better than stationary sink (about half of stationary sink). In case of mobile sink, the consumed energy of lattice topology is better than random topology for large number of nodes. In the case of mobile event, the goodput of AODV is better than DSR and it is stable. For large number of nodes, the goodput of DSR is low and unstable. In the case of mobile event, the depletion of Shadowing is lower than TwoRayGround. For low transmission rate, the delay of Shadowing is lower than TwoRayGround. However, for large transmission rate, the delay of Shadowing is higher than TwoRayGround.

Implementation of SmartBox End-Device for a P2P System and Its Evaluation for E-Learning and Medical Applications

In this paper, we present the experimental results and evaluation of the Smart Box stimulation device for elearning and medical applications in a P2P system which is based on JXTA-Overlay. The Smart Box is integrated with our P2P system as a useful tool for monitoring and controlling learners or patients activities. We found by experimental results that by Smart Box we can increase the learner’s concentration and check the patient’s situation. We also investigated the relation between learner’s body movement, concentration, and amount of study. Furthermore, we carried out experiments with a patient in the bed. From the experimental results, we conclude that the use of Smart Box is an effective way for e-learning and medical applications.

Improving reliability of JXTA-Overlay P2P platform: A comparison study for two fuzzy-based systems

The final publication is available at IOS Press through http://dx.doi.org/10.3233/JHS-150506

A new system for supporting children with autism spectrum disorder based on IoT and P2P technology

In this paper, we implement and evaluate the performance of a new system based on internet of things (IoT) and P2P technology for supporting learning and improving the quality of life for children with autism spectrum disorder (ASD). Many children with autism are highly interested and motivated by smart devices such as computers and touch screen tablets. These types of assistive technology devices get children with autism to interact, make choices, respond, and tell parents what they are interested, need, think, and maybe even feel. Our proposed system uses JXTA-Overlay platform and SmartBox device to monitor the children and create P2P communication between children, caregivers and therapists. Various visual systems, such as objects, photographs, realistic drawings, line drawings, and written words, can be used with assorted modes of technology, as long as the child can readily comprehend the visual representation. Vocabulary skills, mathematics skills and other life skills can be taught through our proposed system. We evaluated the effect of our system during study sessions of children diagnosed with ASD. The experimental results show that our system supports engaged learning and the SmartBox increases and maintains the concentration of children with ASD during studying.

Improvement of JXTA-Overlay P2P Platform: Evaluation for Medical Application and Reliability

JXTA-Overlay is a middleware built on top of the JXTA specification, which defines a set of protocols that standardize how different devices may communicate and collaborate among them. JXTA-Overlay provides a set of basic functionalities, primitives, intended to be as complete as possible to satisfy the needs of most JXTA-based applications. In this paper, the authors improve the reliability of our JXTA-Overlay P2P platform by implementing a new fuzzy-based Peer Reliability (PR) system. In the system, the authors considered three input parameters: Local Score (LS), Security (S) and Number of Interactions (NI). They evaluate JXTA-Overlay platform for medical applications and reliability. The experimental results show that by using JXTA-Overlay is possible to decide the situation of the patients. The simulation results have shown that the proposed system has a good performance and can choose reliable peers to connect in JXTA-Overlay platform.

Secure Communication Setup for a P2P-Based JXTA-Overlay Platform

At present, the maturity of the peer-to-peer (P2P) research field has pushed through new problems such as those related with security. For that reason, it is important to provide security mechanisms to P2P systems since security is one of the key issues when evaluating them. The JXTA-Overlay project is an effort to use JXTA technology to cater to a generic set of functionalities that can be used by developers to deploy P2P applications. However, since its design focused on issues such as scalability or overall performance, it did not take security into account. This paper proposes a security framework specifically suited to JXTA-Overlays idiosyncrasies. The main features of the proposal presented in this paper include a completely modular approach which may cater to a broad set of scenarios, an effective secure key distribution method, and a hybrid key-authenticity scheme which balances the need for meaningful information at the end-user level and simplicity at the lower middleware layers.

Experimental Results and Evaluation of SmartBox Stimulation Device in a P2P E-learning System

In this paper, we present the experimental results and evaluation of the SmartBox stimulation device in P2P e-learning system which is based on JXTA-Overlay. We also show the design and implementation of the SmartBox environment that is used for stimulating the learners motivation to increase the learning efficiency. The SmartBox is integrated with our P2P system as a useful tool for monitoring and controlling learners’ activity. We found by experimental results that the SmartBox is an effective way to increase the learner’s concentration. We also investigated the relation between learner’s body movement, concentration, and amount of study. From the experimental results, we conclude that the use of SmartBox is an effective way to stimulate the learners in order to continue studying while maintaining the concentration.

Implementation of an E-learning System Using P2P, Web and Sensor Technologies

This work is motivated by the need to developdecentralized P2P approaches to supportlearning and teaching activity in virtualuniversities. In this paper, we present theimplementation of the JXTA-based e-LearningP2P system. We also show the design andimplementation of a smart box environment thatwill be used for stimulating the learners toincrease the learning efficiency. The proposede-learning P2P system is a useful tool formonitoring and controlling learners’ activity. Weevaluate the proposed system by experimentalresults and show that proposed system has a goodperformance. In the future, we aim to use it inreal virtual campus environments.

Design and Implementation of an Omnidirectional Wheelchair: Control System and Its Applications

With the accelerating development of aged tendency of population and rapid growth in the number of the disabled caused by diseases or injuries, the wheelchair with good performance for the aged and disabled is attracting the attention from the society. A wheelchair can provide the user with many benefits, such as maintaining mobility, continuing or broadening community and social activities, conserving strength and energy, and enhancing quality of life. The wheelchair body must be compact enough to go through narrow doorways. The wheelchair must be wide enough to prevent the patient from falling on the floor. A large footprint is therefore desirable for stability and safety, while wheelchairs must conform to dimensional constraints. For this reason, in this paper, we present the design and implementation of an omni directional wheelchair, which has a small size and can move easily in narrow spaces. We present the design of the proposed omni directional wheelchair and discuss some implementation and application issues.