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1 – 3 of 3Hirokazu Iemura, Yoshikazu Takahashi, Mulyo Harris Pradono, Pariatmono Sukamdo and Rudi Kurniawan
The paper aims to study the effects of the tsunami that affected Banda Aceh in 2004.
Abstract
Purpose
The paper aims to study the effects of the tsunami that affected Banda Aceh in 2004.
Design/methodology/approach
During a survey by Japanese researchers in Banda Aceh and surrounding areas in Indonesia after the great Sumatra earthquake, questionnaires were distributed to the people affected by the earthquake and tsunami. The purpose of the questionnaires was to collect information of what happened and what were expected by the affected people to be safe against future earthquake and tsunami. The questionnaires consisted of questions asking their experience during and after the earthquake and tsunami.
Findings
One important result of the questionnaires shows that even if people had started running away just after the big earthquake, the percentage of expected survivors would have been less than 100 percent.
Originality/value
The paper shows that education, socialization (software) and escape structures, warning system, wave resisting structures (hardware) are important factors for people to be safer against future earthquake and tsunami attacks.
Details
Keywords
Hideyuki Takahashi, Kazuhiro Yamanaka, Satoru Izumi, Yoshikazu Tokairin, Takuo Suganuma and Norio Shiratori
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…
Abstract
Purpose
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.
Design/methodology/approach
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.
Findings
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.
Originality/value
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.
Details
Keywords
Kaiyu Dai, Fangwei Xie, Qingsong Gao, Desheng Zhang, Erming Ding and Xinjian Guo
The purpose of this paper is to study the pressure response characteristics of the cartridge electromagnetic relief valve, which offers the problems caused by low pressure…
Abstract
Purpose
The purpose of this paper is to study the pressure response characteristics of the cartridge electromagnetic relief valve, which offers the problems caused by low pressure response and low efficiency in hydraulic plate shearing machines.
Design/methodology/approach
First of all the mathematical model of the cartridge electromagnetic relief valve is deduced to analyze the influence of the relevant parameters on the system pressure response. Then experiments are conducted to research the dynamic characteristics on building and relieving pressure. Through comparison of theoretical and experimental research, the results are found.
Findings
The results show that the input flow, working pressure, diameter of adjacent damping hole, and spring stiffness of the main valve have great influence on building pressure of the system, and have no influence on relieving pressure, while diameter of damping hole of control cover plate has influence on the building and relieving pressure of the system.
Originality/value
The research results provide powerful theoretical support for the parametric design of the cartridge electromagnetic relief valve in the hydraulic system of plate shearing machine.
Details