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In all the countries in the world, emergency calls are made via verbal communication through fixed or mobile telephone networks. This paper describes a new emergency communication system which would enable persons with hearing and speaking disabilities to communicate their emergency situation via smart phones or traditional mobile phones via text and/or pictorial diagrams. This paper proposes also...
In E-learning it is one of available evaluation methods that students in the learning community evaluate each other (peer assessment). We consider methods to support assessments between learners that have not actually met. In such a context, it is important that trust exist between learners. In this paper, we describe the concept of peer assessments support system for dependable evaluation.
This paper proposes a new strategy which makes modern electric power systems more resilient against large disasters, and shows new analysis methods for the optimum operation of the resilient power systems. The strategy is based on islanding operation of healthy distribution networks by using a lot of small distributed generators (DGs) such as photovoltaic generators (PVs), fuel cells, batteries and...
The carbon-hydride energy storage system stores hydrogen, which is difficult to handle, in the form of the stable liquid methylcyclohexane, thereby making it easy to transport and keep hydrogen in long-term storage as an energy medium. Since this makes it easy to convert energy into hydrogen for storage and reuse, it can contribute to the stable supply of renewable energy such as wind power, which...
In the Great East Japan Earthquake people could not use the telephone service of a cellular phone because the huge voice traffic pour into mobile network and cellular carriers took the measure of the originator regulation. Although the Internet was useful in the less affected areas, the delivery of the cellular phone e-mails delayed in the less affected regions like Tokyo. This paper derives the delivery...
Demonstration tests of Japanese-format terrestrial “one-seg” digital broadcasting (in combination with autonomous solar-power generators set-up in an Indonesian rural area without its own power generation) were performed, the results of the tests were analyzed, and the application of this broadcasting format in the public sector was investigated. The results of the investigation and analysis confirmed...
Smart grid has attracted attentions and expresses a view for the future power systems in the world. Demand Side Management(DSM) is a significant method in smart grid that helps the energy providers to shift behind the peak load. Some methods to reduce peak load have been studied in dynamic pricing. One of the purposes is to delay the demand to periods of low electricity price. The conventional scheduling...
Collecting sharing, and delivering information in disaster situations is crucially important. Mass media such as TV, radio, and newspapers have played important roles in information distribution in past disasters and crises. Recently, social media have received much attention for their use as an information sharing tool. Especially, it is said that people used Twitter to collect and share information...
This paper presents the development of information services for preserving the vegetation information in a campus area. Conservation and sustainable use of biodiversity is one of the major humanitarian technology concerns. This paper presents the development of Biological Diversity Information system at the University of Indonesia's campus, particularly to record all information on plants around the...
To assist busy people such as working persons, students, and nurturing families to have economical and healthy lives with homemade cooking, we have proposed a Web-based HOmemade Cooking Assistance System (HOCAS). Previously, we implemented the menu planning function and the cooking-step scheduling function at the server using JSP/Servlet, so that a user can plan a menu for the whole week and make...
Estimation of motivation and learning strategy of students is crucial for a teacher to engage them in programming. Let us consider a persona, which is a virtual student representing a student group similar in motivation and learning strategy to learn programming. Personas enable the teacher to predict student behavior during the programming education course. The paper proposes a method to figure out...
When the great disaster strikes, it is most important for victims to receive and transmit appropriate information in order to evacuate immediately and to request for assistance and rescue. The Great East Japan Earthquake teaches us the importance of information communication technology (ICT) using wireless communication technology, e.g., television (TV), radio, the community wireless system for disaster,...
We demonstrate dynamic optical transport connectivity to various lengths and types of fiber (SMF, DSF, GI-62.5/125 fiber) with a 100 Gbit/s digital coherent optical transponder. The outage time associated with connection was only ~70 ms (potentially as fast as 20 ms) in all configurations. This feature provides great simplicity and flexibility as regards immediate broadband connection to the backbone...
We have developed a mobile testing system using adaptive testing for assessing learning at museums, parks, and other sites in the field. Adaptive testing is a form of computer-based testing that progressively estimates an examinee's ability from his/her answer history and uses that ability to present test items making ability estimation even more accurate. Field-testing, however, requires activities...
Although much of the work has been done until today to realize the Internet of Things (IoT) into practice, most of the work focuses on resource-constrained nodes, rather than linking the existing embedded systems to the IoT network. In this paper, we propose the uID-CoAP architecture, a new architecture designed to host IoT services on common embedded systems, like usual consumer appliances. As they...
Wireless sensor networks generate big-data which leads to overwhelming traffic in the networks. Compressed sensing (CS) can exploit signal sparsity to reduce the amount of traffic. We evaluate the performance of 1-bit CS with a circulant random bipolar measurement matrix. The results show that 1-bit CS can decrease traffic at higher degree in wireless sensor networks compared to the conventional CS...
A wireless body area network is a radio-frequency-based wireless networking technology that interconnects tiny nodes with sensor or actuator capabilities in, on, or around a human body. WBANs provide promising applications in medical monitoring systems to measure specified physiological data and also provide location-based information, if required. This paper we propose the preliminary investigation...
In this paper, we report development and performance verification of a wireless body area network prototype compliant with the MAC protocol of the IEEE802.15.6 BAN. The relaying functionality which utilizes a relay between a hub and a node is confirmed when a direct path between them is not available due to shadowing effects. The delay due to switching to the relay topology is less than one second...
East Japan Great Earthquake on March 11 in 2011 caused severe damages over the wide area of Northern Japan, and there are many remained problems even now. Information network systems were also severely damaged by the East Japan Great Earthquake, and a robust network has become one of the significant subjects. Compared with the previous major earthquake in Japan such as the Hanshin-Awaji Great Earthquake,...
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