Information Systems Architecture Research Division
The Information Systems Architecture Science Research Division deals with the research issues in software/hardware architectures of computers and networks, and their system implementation.
Exploring more efficient and securer communication networks ABE Shunji
My research activity aims to facilitate, in the telecommunication network society, exchanges of information in a quick, smooth, accurate and compact form. One subject of my study is the development and evaluation of performance of systems for controlling the traffic of communications that run through the next generation of optical, mobile IP and other networks. I also work on research for making networks securely and safely available. For example, I study procedures for quickly detecting DoS/DDoS attacks that occur from intentional transmission of an enormous amount of data to the server, causing system failure. I also study procedures for server operation.
Elucidating the intriguing behaviors exhibited by the Internet FUKUDA Kensuke
The Internet is connected with countless information processing devices, including personal computers. However, only a set of simple rules is specified for using the Internet for the transmission and reception of information. Hence, there is no system that allows anyone to directly control the entire Internet. Each element constituting the Internet communicates with others individually. In fact, the Internet is an autonomous distributed system formed by many such devices. It is now known that, when individual devices perform their own operations on the Internet independently of one another, the Internet exhibits very interesting behaviors as a whole. I was intrigued by such phenomena and began research into them.
Basic research for ultra-high-speed and extra-large-volume academic networks URUSHIDANI Shigeo
To sophisticate its research and education environment, the National Institute of Informatics operates SINET, the latest academic information network connecting related institutes. My research activity is focused on basic technologies for reliably and economically creating a backbone for ultra-high-speed and extra-large-volume networks. I have also been involved in the design and structuring of SINET. I will continue creating technologies more advanced than the latest networks, and then reflecting them in networks on a regular basis. This will lead to innovative networks for practical use.
Quality of service provisioning in advanced communication networks JI Yusheng
Communication networks are used for exchanging information between people and computers which are located at physically distant points. To enable rapid and accurate transmission of information in a network, it is important to ensure quality-of-service aspects such as transmission delay, delay differences, and loss of information. My research is focused on finding efficient ways to ensure quality of service in advanced communication networks.
Remote lecture system for enabling any student to take courses irrespective of distance NAKAMURA Motonori
Quality lectures should be made accessible to all students irrespective of where they live. Based on this wish, I have been involved in development of a remote lecture system to connect remote classrooms with one another on a real-time basis. My challenge for the future is ensuring that remote lectures function as opportunities for students and teachers to interact more closely with each other. For that purpose, I study infrastructure for improving lecture rooms and network environments and concerning safety and security.
Investigating services to make high-performance computation quickly available to anyone AIDA Kento
Computers have progressed remarkably. Performance-wise, those we use today surpass those used at computer technology centers 20 years ago, and this is accompanied by progress in computer science. My dream is to develop this area of research and make the resultant powerful technology of high-performance computation quickly accessible to computer scientists and anyone else.
My biggest dream is to design a network of the world's greatest supercomputers and to make the services established by this network available from Japan. My current research believes that "lossless" networks are as essential as any local physical component of a supercomputer required to process huge amounts of information.
My research activity aims at improving the usability of man-machine interfaces in order to make it easier for humans to work using computers. My goal is to build a closer relationship between people and machinery. I will also seek theoretical evidence.
Mobile agents are considered a next-generation software technology. The active software executes processing by moving among different computers at will. Realization of this software requires that a device be installed so that the mobile agent temporarily stops processing and moves on the network, as if "frozen" before being automatically "unfrozen" and beginning to operate as soon as arriving at the next computer. Apart from basic software, my research is focused on new network technologies and applications using mobile agents.
The software used today is at a huge scale and highly complex. Rewriting all possible elements to make a program run faster would have significant benefits. But doing so raises certain issues. For example, will making individual elements faster make the overall program run faster? Could the work done to prepare for automatic rewriting affect program speed? Right now, automatic program conversion is possible in a limited scale. I'm hoping to resolve various issues to build a practical automatic program conversion system.
Heightening efficiency and reliability through scientific programming HU Zhenjiang
Simply stated, my research focuses on scientific programming. In the past, programming relied on experience. I develop theories for operating programs from, for example, numerical structures that lie behind them. Anyone that masters the theories will be capable of efficiently making reliable and safe programs with ease.
Forming verification technology for boosting software reliability NAKAJIMA Shin
In the past, the use of large computers was limited to specialized operators. These days, software of an equivalent level is installed in cell phones and common people use it casually. So-called embedded software for use in household appliances, etc. has spread at an extraordinary rate. Defects in such software can trigger huge impacts. My research is aimed at creating reliable software.
My research thus far has been based on awareness of the needs of society of the near future. For many years I have studied Smartive, which is designed to add agent functions (software) to products such as images uploaded to the Internet (content) and ensure safety in content distribution. Today I strongly feel the need to train software engineers for the next generation. I have launched activities for that purpose.
I intend to create a mechanism for software to learn a variety of information and to improve. This enables Smartive to act precisely as the sole agent for its owner by sensing his/her intent and thinking and acting accordingly. It will also be feasible to create software to more appropriately choose means of security based on comprehensive knowledge of weaknesses and habits. I will continue studying in pursuit of an amazing world in which software works as our partner, enriches lives and elevates our activities.
Development of next-generation CAD tools for asynchronous circuits YONEDA Tomohiro
Today's computers incorporate a synchronous circuit embedded with the clock function. The use of a clock signal makes controls easier because of greater ease in terms of timing. Many problems have arisen as transistors have been made smaller. In an attempt to solve the problem, I focused on asynchronous circuits that were used in the first years after the development of computers. Starting from assembling the algorithm for design, I perform programming to develop CAD tools dedicated to these circuits. I study numerous elemental technologies for that purpose.
Developing systems that apply state-of-the-art technologies to everyday life TEI Kenji
Wireless sensor networks advance sensor technologies still further to provide even more sophisticated functions. These networks collect information about the real world from a network of multiple sensor nodes—small computers with built-in sensors—installed across wide areas. My research addresses the resource efficiency problem and is tackling several themes: optimal routes for transmitting gathered data between sensor nodes; ways to communicate externally from sensor nodes; and minimizing transmitted data volumes without sacrificing accuracy. In short, how to achieve the most ecological and highly reliable systems in the wireless sensor networks subject to these various constraints.