Search results

Considers the question: if a system is recognized as a network and networks face an informational risk, which sort of networks should be employed to reduce the risk? Shows that if infection type is strong, then the worst infected groups are subnetworks with the strong number of the network. If infection type is weak, then the worst infected groups are pivotal sets with the pivotal number of the network. Also shows that under the restriction of process capacity if n ≤ (3/2) × k + 1, then a strong and weak infection proof network exists. If n > (3/2) × k + 1, then finds a weak infection proof network with the smallest strong number such that 2 × q ‐ 1, if r = 0, 2 × q if 1 ≤ r ≤ ^k‐₂ and 2 × q + 1 if ^k‐₂ < r ≤ k ‐ 1.

Much current Japanese popular discussion centres around the sudden death, at an early age, of Japan′s hard‐working white‐collar workers: karoshi – death from overwork – or Salaryman′s Sudden Death Syndrome. Officially it does not exist as the Government and big business are hesitant to legitimatize the phenomenon because of the response which, both local and international, it would evoke. Nonetheless, it is a common phenomenon. Describes karoshi, defines the extent of the phenomenon, and analyses its future impact on Japan and the world.

The purpose of this exploratory study was to develop Global Lesson Study (GLS) defined as an international collaborative lesson study through international exchange of teachers using ICT. Its purpose is to nurture teachers from different countries with intercultural competence to conduct lesson study.

We developed an initial program for GLS in the subject of mathematics education between elementary school teachers in Japan and Singapore. The qualitative analysis of activities at each stage of the Pilot GLS was conducted from two perspectives: (1) intercultural competence for lesson study and (2) teacher's competency for subject instruction.

Through GLS, a new lesson was created that was only possible with discussions from teachers from different locations. It was clarified that GLS was not only useful for training teachers with intercultural competence for lesson study but also has led to the improvement of teacher's competency for subject instruction in mathematics.

The GLS is a new attempt in the sense of developing a high-quality lesson study method for creating new lessons as well as improving qualities and abilities of teachers through international exchange.

Real‐time multimedia supervisory systems generally include a distributed system that delivers live video input captured with cameras at the watched person's site, using a PC or hand‐held device at the distant supervisor's site. The system comprises many entities such as cameras for image capture, transmission software, network connections, receiver software, a display device, multimedia processing software and hardware, control software, etc. The purpose of this paper is to realize a safe and convenient supervisory system that autonomously provides users with services that fulfill users' requirements related to quality and privacy in a ubiquitous information environment.

A system is designed by integrating environmental information acquired from the real world and knowledge related to human social activities. A real space understanding mechanism is proposed to infer the situations and relationships of users by combining sensing information and social knowledge. Social knowledge related to human relationships, the life style of the watched person, home structure, etc. is used with ontology to infer the situations of users.

An early prototype was implemented for supervising elderly people and some experiments were performed based on several scenarios. Results obtained from some experiments confirmed that this supervisory system can provide real‐time multimedia supervisory services for elderly people, with reasonable quality‐of‐service and privacy that meet the users' requirements.

The system described in this paper assesses the situation of users and surrounding environmental information to provide appropriate supervisory services. This paper provides insight into the design and development of ubiquitous application systems to realize comfortable and safe services using a combination of environmental information and social knowledge.