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- 저자 : Takashi Oguchi (검색결과 7 건)
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An evaluation study on advanced public transport priority system using traffic simulation
Takashi Oguchi,Akira Mitsuyasu,Daisuke Oshima,Takane Imagawa 서울시립대학교 도시과학연구원 2017 도시과학국제저널 Vol.21 No.2
For the reasons of environmental issues, congestion mitigation, and vulnerable road users, the surface mass public transport (PT) system in urban area should be improved and promoted in Japan. This paper provides an overview of the current state of public transport priority system (PTPS) and the possibility of advanced PTPS. The effects of advanced PTPS by microscopic traffic simulation are estimated. As a result, it is found that advanced PTPS improves time reliability and transportability of buses, even if a congestion around an intersection occurs. The introduction of combination of bus lane and advanced PTPS improves time reliability and the transportability more. On the other hand, the introduction of bus lane reduces the acceptable volume of other vehicles because of reduction in the number of lanes for them. It is considered that the other users are also expected to shift to PT along with the PT level of service improvement.
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Real-time Monitoring System for Container Networks in the Era of Microservices
Naoki Oguchi,Yosuke Takano,Reiko Kondo,Masaaki Noro,Takashi Shiraishi 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09
Large-scale web services are increasingly adopting the microservice architecture that mainly utilizes container technologies. Microservices are operated on complex configured infrastructures, such as containers, virtual machines, and physical machines. To ensure service quality of microservices, it is important to monitor not only the quality of services but also the quality of the infrastructures utilized by the services. Therefore, the metrics of the infrastructure related with the services should be traced. An extended Berkeley Packet Filter (eBPF) is a relatively new Linux’s function, which is effectively used as a sensor of container-network metrics. There are two key challenges in realizing the service-linked monitoring system. One challenge is making the full-stack topology between microservices, containers, and machines visible to set the sensor related with the services. Another challenge is dynamic sensor management that can relocate the sensor quickly after the topology’s change. In this paper, we propose a real-time monitoring system that creates a full-stack topology and relocates the sensor in conjunction with events from a container orchestrator. The system enables a dynamic deployment of the sensors related with the monitored services.
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Sergey V. Mikhailenko,Yusuke Oguchi,Togo Shimozawa,Takashi Ohki,Adrian O. Olivares,Enrique M. De La Cruz,Shinichi Ishiwata 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.3
The interaction between actin and myosin V has been probed by measuring the unbinding force of individual actomyosin complexes using optical tweezers. Surprisingly, we found that in both the nucleotide-free and ADP-bound states single- and double-headed binding occurs with approximately the same probability. Estimation of the spring constant of individual actomyosin complexes confirmed that in each of the nucleotide states two distinct populations exist. These results confirm that optical nanometry can be used to reliably study the mechanism of how cytoskeleton molecular motors interact with their associated polymer lattices under solution conditions more closely resembling the intracellular environment.
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윤순옥(Soon-Ock Yoon),사이토 쿄지(Kyoji Saito),황상일(Sang-Ill Hwang),다나카 유키야(Yukiya Tanaka),오구치 다카시(Takashi Oguchi) 대한지리학회 2005 대한지리학회지 Vol.40 No.3
산록에 있는 선형의 완사면이 페디멘트인지 선상지인지에 대한 주제는 한국 지형학사를 통하여 오랜 기간 논의되어 왔다. 결국 페디멘트 연구자들에 의해 그동안 선상지의 존재가 부정되면서 선상지 용어사용 및 선상지 연구에 걸림돌이 되어 왔다. 이러한 논의를 정리하기 위해서는 지형형성기구 및 프로세스에 대한 종합적인 인식을 기초로, 구체적이고 논리적인 이론 정립이 요구된다. 본 연구는 지금까지 선상지가 부정되었던 쟁점들을 논의하고, 검토하여 한반도 선상지 연구에 보다 정확한 이론적 지표를 제시하고자 하였다. 또한 세계적인 선상지와 비교하기 위하여 한반도 남부에서 13개의 선상지를 선정하고 지형면의 분포특성을 고찰하였다. The question of whether fan type surface developed at the foot of mountains is pediment or alluvial fan has been discussed consistently through the Korean geomorphic history. Unfortunately the term, ‘alluvial fan’ was scarcely used, also even the existence of alluvial fan has been denied throughly for a long time in Korea. The negation of alluvial fan brought some difficulties in the development of the related Geomorphology. In order to resolve such a problem, more logical and exquisite theory by examination of geomorphic process must be systematically presented on the basis of overall problem recognition. The objective of this study is to represent the theoretical indicator based on the investigation of the points at issue that the existence of alluvial fan in Korea was denied. Moreover, we selected 13 alluvial fans in southern part of Korean Peninsula to compare with the worldwide alluvial fans according to theoretical indicator, and analysed their geomorphic distributional characteristics.
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한반도 남부 선상지의 계량적 지형 특성과 일본, 타이완, 필리핀 선상지와의 비교 연구
윤순옥(Soon-Ock Yoon),사이토 쿄지(Kyoji Saito),황상일(Sangill Hwang),오구치 다카시(Takashi Oguchi),다나카 유키야(Yukiya Tanaka) 대한지리학회 2010 대한지리학회지 Vol.45 No.4
한반도 남부 13개 선상지를 일본, 대만, 필리핀의 690개 선상지와 비교, 분석하였다. 선상지 경사와 함양역 면적, 선상지 경사와 함양역 기복비, 선상지 면적과 함양역 면적, 그리고 함양역 면적과 함양역 기복비와의 관계를 정량적으로 검토한 결과, 한반도 남부의 선상지는 아시아의 선상지 특성과 잘 부합되지만, 선상지 빈도와 밀도가 낮다. 또한 선상지 하천의 함양역 규모가 작고, 기복비가 커서 선상지 규모가 작고 경사가 급하다. 36개 주요 하천 곡구부에서 선상지가 형성되지 않는 것은 상대적으로 낮은 산지고도와 함양역의 기복비 때문이다. 한국의 선상지에서는 Blair and McPherson이 주장한 지형면 경사의 공백을 확인할 수 없으며, 경주 선상지는 경사가 완만한 하성 선상지의 가능성이 높다. The morphometric characteristics of 13 alluvial fans in the southern parts of the Korean Peninsula are studied and relationships between their distributions and causes are discussed by comparing them with 690 alluvial fans in Japan, Taiwan and the Philippines. The relationships between the surface gradient of alluvial fans and source basin area, the surface gradient and the relief ratio of the source basin, and the source basin area and the relief ratio were investigated. The alluvial fans in South Korea have typical characteristics of the Asian fans, although their frequency and density are relatively low, and the size and the relief ratio of their source basins are relatively small and steep, respectively. Moreover 36 major Korean river basins without alluvial fans tend to have lower altitude and relief ratios. Contrary to the argument by Blair and McPherson, the natural depositional gaps on the gradient of alluvial fans were not found. The Gyeongju alluvial fan is probably a fluvial fan with gentle gradient, whereas the other Korean fans seem to be debris-flow related on the base of their gradients.
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