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Agent based Simulation of Hot Strip Rolling Mills with Controllers
Keita Ohe,Koichi Nakano,Yoshihiro Abe,Masami Konishi 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Currently, operators try to improve their operating situation under the changing production circumstances. Their operations are some kinds of empirical fruits of manufacturing experiences. It is an important problem in the future to maintain and to extend their technologies having been built up. For the purpose, methods and systems for technical inheritance of advanced techniques like the skilled engineers are needed which can train the unskilled operators and also assist skilled operators. In this research, simulation technology for hot strip rolling mills based on distributed agents is presented aimed to the diagnosis of hot strip rolling mills with controllers. In the operation of hot strip mills, human operators try to maintain rolling conditions in an appropriate situation. To help the operators, it is needed to build an intelligent rolling simulator which can check the whole rolling performances including control apparatus. To help human experts, it is necessary to simulate rolling phenomenon considering operating conditions in detail. It is also required to simulate results by changing control parameters. Visualization of three-dimensional rolling process, and simulation of defects in rolling mills that scarcely occur are studied. In the paper, development of agent based rolling simulator is presented.
Wireless sensor networks for underground railway applications: case studies in Prague and London
Peter J. Bennett,Kenichi Soga,Ian Wassell,Paul Fidler,Keita Abe,Yusuke Kobayashi,Martin Vanicek 국제구조공학회 2010 Smart Structures and Systems, An International Jou Vol.6 No.6
There is increasing interest in using structural monitoring as a cost effective way of managing risks once an area of concern has been identified. However, it is challenging to deploy an effective, reliable, large-scale, long-term and real-time monitoring system in an underground railway environment (subway / metro). The use of wireless sensor technology allows for rapid deployment of a monitoring scheme and thus has significant potential benefits as the time available for access is often severely limited. This paper identifies the critical factors that should be considered in the design of a wireless sensor network, including the availability of electrical power and communications networks. Various issues facing underground deployment of wireless sensor networks will also be discussed, in particular for two field case studies involving networks deployed for structural monitoring in the Prague Metro and the London Underground. The paper describes the network design, the radio propagation, the network topology as well as the practical issues involved in deploying a wireless sensor network in these two tunnels.
Wireless sensor networks for underground railway applications: case studies in Prague and London
Bennett, Peter J.,Soga, Kenichi,Wassell, Ian,Fidler, Paul,Abe, Keita,Kobayashi, Yusuke,Vanicek, Martin Techno-Press 2010 Smart Structures and Systems, An International Jou Vol.6 No.5
There is increasing interest in using structural monitoring as a cost effective way of managing risks once an area of concern has been identified. However, it is challenging to deploy an effective, reliable, large-scale, long-term and real-time monitoring system in an underground railway environment (subway / metro). The use of wireless sensor technology allows for rapid deployment of a monitoring scheme and thus has significant potential benefits as the time available for access is often severely limited. This paper identifies the critical factors that should be considered in the design of a wireless sensor network, including the availability of electrical power and communications networks. Various issues facing underground deployment of wireless sensor networks will also be discussed, in particular for two field case studies involving networks deployed for structural monitoring in the Prague Metro and the London Underground. The paper describes the network design, the radio propagation, the network topology as well as the practical issues involved in deploying a wireless sensor network in these two tunnels.
Shun Igarashi,Yuji Kasukawa,Koji Nozaka,Hiroyuki Tsuchie,Kazunobu Abe,Hikaru Saito,Ryo Shoji,Fumihito Kasama,Shuntaro Harata,Kento Okamoto,Keita Oya,Naohisa Miyakoshi 대한골다공증학회 2023 Osteoporosis and Sarcopenia Vol.9 No.4
Objectives: Chronic kidney disease (CKD) complicated by secondary hyperparathyroidism (SHPT) is associated with an increased risk of fragility fractures. Etelcalcetide (EC) is a treatment for SHPT that reduces serum parathyroid hormone (PTH) levels. However, the effects of combined treatment with osteoporosis drugs such as teriparatide (TPTD) remain unclear. This study investigates the combined effects of EC and TPTD on bone in CKD model rats. Methods: The CKD model was established in 8-week-old male Wistar rats by feeding them a 0.75% adenine diet for 4 weeks. At 20 weeks of age, the rats were divided into 4 groups (n = 9–10 in each group): CKD group (vehicle administration), TPTD group (30 μg/kg, 3 times/week), EC group (0.6 mg/kg, daily), and Comb group (TPTD and EC combined). EC was injected for 12 weeks starting at 20 weeks of age, and TPTD was injected for 8 weeks starting at 24 weeks of age. After treatment, the followings were evaluated: bone mineral density, bone strength, biochemical tests, bone and fat histomorphometry, and micro-computed tomography. Results: In CKD model rats, the combination of EC and TPTD was more effective in increasing cortical bone thickness and bone strength and inhibiting porosity. In addition, the combined treatment decreased bone marrow adiposity and fibrosis, and it increased bone mass and improved bone microstructure in trabecular bone. Conclusions: With the observed benefits such as improved bone mass, bone strength, structural properties, and bone marrow adiposity, combination therapy may be a potential way to improve bone fragility in CKD.