Noriki Uchida

Research on Never Die Network for Disaster Prevention Based on OpenFlow and Cognitive Wireless Technology

By large tsunami damage due to the Great East Japan Earthquake, many existing network system stopped functioning in various factors. Even under such circumstances, some of the information communication method that including satellite communications, it was able to recover the Network Connectivity, actually quickly and effectively. Although there are some valid information communicating method in disaster, however the information communication method has a strong and weak points, when using each a single unit, it is not possible to follow the disaster area of the situations to be constantly changing. In addition, the emergency information communication system there may not be available in the battery out and do not know how to use in case of emergency. Therefore, it is important to design a systems available without a disaster by providing enough Network Capability. We develop a Never Die Network (NDN) system that is a new network system to achieve both the Network Capability in the normal and Network Connectivity in disaster based on the experience of Great East Japan Earthquake. In this paper, we propose a method for the system to autonomously derive the optimum packet flow by measuring the communication state such as throughput and packet loss in a system such as to considering multiple different access networks. We prepared a test bed that implements a prototype system, and evaluated based on a disaster scenario.

IEEE802.11 Based Vehicle-to-Vehicle Delay Tolerant Networks for Road Surveillance System in Local Areas

In northern areas, the road conditions during the winter especially in mountain areas are one of the significant safety subjects for the residences and the tourists. In addition, there are some areas that the network services such as LTE or 3G are unavailable to use in mountain areas. For this reason, this paper proposed the Vehicle-to-vehicle (V2V) communication methods with the Delay Tolerant Networks (DTN) for the road surveillance system. In the proposed network system, IEEE802.11b/g/p is supposed for introducing the wireless V2V system, and the observed road conditions data is transmitted with the DTN routings. For the efficiency of the proposed network system, the GIS road maps of Takizawa in Japan are introduced for the computational simulations. Also, various DTN routings such as the Epidemic, the Spray and Wait, and the Maxprop routing are held for the future studies of the V2V based DTN routings of the road surveillance system in local areas during the winter.

Performance Evaluation of a Learning Logger System for Active Learning Using Smartphone

In our previous work, we presented an interactive learning process, which use the students’ study records in order to improve the students’ learning motivation and the self-learning time. To improve the progress speed of a lecture and the efficiency of the Self-learning, we proposed an Active Learning System (ALS) using smartphone. In addition, we suggested the group discussion system of ALS. However, the previous interfaces for interactive learning had limited adequacy in maintaining participants’ concentration when their skill levels vary. To solve this problem, we proposed the interface of smartphone on our ALS to improve the learning concentration. In this paper, we show the performance evaluation of ALS that use improved human interface on the mobile devices. The evaluation results show that the interactive lecture using ALS increases the students’ concentration.

Performance Evaluation of an Active Learning System Using Smartphone: A Case Study for High Level Class

In our previous work, it was presented an interactive learning process in order to increase the students learning motivation and the self-learning time. We proposed an Active Learning System (ALS) for student’s self-learning. For low and middle level class, we showed that the students could keep high concentration by using traditional ALS. However, for high level class, many student could not keep their concentration, because of they have a lot of question that they did not understand. In this paper, to solve this problem, we propose a method of group discussion to deal with students’ questions for high level class. We also present the performance evaluation of ALS for high level class. The evaluation results show that when the lecture use proposed ALS for high level class, the average dropping out was half compared with the conventional ALS. Also, the method of group discussion increases the students’ concentration for high level class.

Proposal of a Common Infrastructure System for Real-Time Disaster Information Transmission

In this research, we propose a Common Infrastructure System for the disaster countermeasures headquarters to transmit disaster information to residents speedily at the time of large-scale natural disaster. A Common Infrastructure System realizes digitization of the disaster information concentrated in the disaster countermeasures headquarters. And, this system extracts only the information, which should be transmitted to residents automatically from digitized disaster information. Moreover, this system simultaneous transmits disaster information to various disaster communication tools such as a cable TV, an emergency mail and a municipal disaster management radio communication network.

Proposal of the Disaster Information Transmission Common Infrastructure System Intended to Rapid Sharing of Information in a Time of Mega Disaster

This paper proposes the Disaster Information Transmission Common Infrastructure System (DITCIS) intended to rapid sharing of information in a time of mega disaster. This Disaster Information Transmission Common Infrastructure System consists of the Relief Supplies Distribution Management System, the IC Card Authorization Safety Confirmation System, the Web-GIS Disaster Management System, the Disaster Information Registration System, the Disaster Information Sharing System, and the Disaster Information Transmission Platform. In this paper, we introduce the Disaster Information Registration System, the Disaster Information Sharing System, and the Disaster Information Transmission Platform. The Disaster Information Registration System enables to register disaster information provided by the related institutions. And, the Disaster Information Sharing System enables to share exact disaster information in the disaster countermeasure headquarters. Moreover, the Disaster Information Transmission Platform enables to automatic upload or automatic delivery disaster information to various communication tool.

DTN Based MANET for Disaster Information Transport by Smart Devices

In Japan, large scale earthquakes frequently occur. At the occurrence of disaster, network infrastructure is often seriously damaged and traffic congestion occurs. Particularly since the network communication environments of mountain areas are not well developed, it is difficulty to normally use the communication means once the disaster happened. We have investigated the network communication method which can use in the case disasters, and developed Never Die Network (NDN) [1] based on Software Defined Network (SDN) to realize as a disaster network. In NDN, each SDN switch monitors network performance from the network module. If NDN switch detects network failure or performance degradation, then the NDN Controller switches to the other network. NDN is valid as a network communication infrastructure at part of disaster area. Conversely, Delay / Disruptions Tolerant Network (DTN) can realize mobile devices communication without constructing infrastructure. DTN is effective at the time of disaster as mobile adhoc network (MANET), but more efficient routing and battery utilization have to be considered. In this paper, we propose a DTN based mobile adhoc network for temporal network in the case of disaster and considered transfer disruption and transfer delay. We constructed an experimental prototype by smart devices and evaluated its performance to verify the advantages of our suggested system.

Dynamic Group Formation for an Active Learning System Using Smartphone to Improve Learning Motivation

In our previous work, we presented an interactive learning process in order to increase the students learning motivation and the self-learning time. We proposed an Active Learning System (ALS) for student’s self-learning. For each level (low, middle and high level) class, we showed that the students could keep concentration using our proposed ALS. However, in the group discussion, some students who understood the lecture could teach other students who did not understand “study points”. But, many students complained that they did not feel like a lecture style. In this paper, to solve this problem, we propose a new method for dynamic group formation. After the system decides the level of lecture understanding, the students who did not understand the lecture make the presentation and show the points that they did not understood. Also, the students who understood the lecture explain by presentation the questions or the points that other students did not understand. So, in the group discussion, each group member presents the points that they understood or did not understand. Thus, most of students can study considering their understanding level using above group discussion and they can keep their learning motivation.

A Collaborative Safety Flight Control System for Multiple Drones

There are a rapid growth of the Drones market, and so it is expects us various applications such as for a military use, a surveillance system, a delivery services, and a pesticide spraying for harvests. However, with the wide spread of drones, the accidents or crimes by them are rapidly increasing. Therefore, in this paper, the collaborative safety flight control system for multiple drones is proposed. The proposed methods mainly consist of the pattern recognition from the camera images, collaborative drone controls by multiple drones, and emergent controls in uncontrollable situations. Then, the prototype of the proposed methods is introduced, the experimental reports are discussed for the future works.

Proposal of Collaborative Object Tracking Methods by Multi-Drones for Flight Surveillance Systems

Although there are rapid growth the drone’s applications such as surveillance systems and delivery systems in recent years, the problems of the accidents are also increasing conversely. Therefore, this paper discusses the collaborative object tracking methods by multi-drones. The proposed methods consist of the function of the motion tracking and the WiFi detections for each drone, and choose a proper level of emergent procedures in order to avoid the drone’s accident in various circumstances. Then, the prototype system of the proposed methods is introduced and discussed for the future works.