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- 저자 : Masao Hijikata (검색결과 4 건)
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Masao Hijikata,Akiyoshi Takagi 서울시립대학교 도시과학연구원 2010 도시과학국제저널 Vol.14 No.2
This paper analyzes the present state and problems of the modern Japanese city planning system from a social information theory perspective, and proposes a theoretical framework for a new city planning system for a culture adapted to information society. First, “communication-based” means taking account of human behaviors to express thoughts, feelings, or information as resources for city planning. All of these together, in addition to values chosen with respect to the future, can be considered the source of the city’s dynamism. Furthermore, while the nature of active social communication has an effect on behavioral patterns in a modern information society, it also has a large effect on the city planning method itself, due to the pervasion of communication systems. This paper considers changes in both directions in order to extract the issues in modern city planning. In order to survey these broad trends in city planning, this study summarizes the main values that city planning around the world has focused on in each era, and investigate and summarize current issues in and the state of modern city planning in an information society. Additionally, we discuss the use of an information support system as a new method in city planning. Using the approach taken by Yamato City in Kanagawa Prefecture in Japan as an advanced example, the development of a paradigm shift in city planning is discussed. In conclusion, this research presents a model of the communication process in collaborative city planning based on an open information system, and propose a plan-making support model based on communication and participation. This paper analyzes the present state and problems of the modern Japanese city planning system from a social information theory perspective, and proposes a theoretical framework for a new city planning system for a culture adapted to information society. First, “communication-based” means taking account of human behaviors to express thoughts, feelings, or information as resources for city planning. All of these together, in addition to values chosen with respect to the future, can be considered the source of the city’s dynamism. Furthermore, while the nature of active social communication has an effect on behavioral patterns in a modern information society, it also has a large effect on the city planning method itself, due to the pervasion of communication systems. This paper considers changes in both directions in order to extract the issues in modern city planning. In order to survey these broad trends in city planning, this study summarizes the main values that city planning around the world has focused on in each era, and investigate and summarize current issues in and the state of modern city planning in an information society. Additionally, we discuss the use of an information support system as a new method in city planning. Using the approach taken by Yamato City in Kanagawa Prefecture in Japan as an advanced example, the development of a paradigm shift in city planning is discussed. In conclusion, this research presents a model of the communication process in collaborative city planning based on an open information system, and propose a plan-making support model based on communication and participation.
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Vertebral Endplate Cyst Formation in Relation to Properties of Interbody Cages
Manabu Sasaki,Masao Umegaki,Takanori Fukunaga,Yasukazu Hijikata,Yohei Banba,Katsumi Matsumoto,Yasuyoshi Miyao 대한척추신경외과학회 2021 Neurospine Vol.18 No.1
Objective: This retrospective study aimed to compare vertebral endplate cyst formation (VECF), an early predictor for pseudoarthrosis, in different types of interbody cages. Methods: We reviewed 84 cases treated with single-level posterior/transforaminal lumbar interbody fusion. We utilized a polyetheretherketone cage in 20 cases (group P), a titanium cage in 16 cases (group Ti), a titanium-coating polyetheretherketone cage in 13 cases (group TiP) and a porous tantalum cage in 35 cases (group Tn). VECF was evaluated comparing the computed tomography scans taken at day 0 and 6-month postoperation. We defined VECF (+) as enlargement of a pre-existing cyst or de novo formation of a cyst with the diameter over 2 mm. We calculated the adjusted odds ratio (OR) and 95% confidence intervals (CIs) as an indicator of association between different types of cages and VECF using a logistic regression model. Results: VECF was observed in 13 (65%), 7 (44%), 9 (69%), and 8 (23%) cases in groups P, Ti, TiP and Tn, respectively. VECF correlated with the type of cage (p=0.04). In comparison with group P, the proportion of VECF (+) cases was lower in group Tn (OR, 0.16; 95% CI, 0.04–0.60) but not different in group Ti (OR, 0.47; 95% CI, 0.10–2.20) and group TiP (OR, 1.06; 95% CI, 0.21–5.28). No patient underwent additional surgery for the fused spinal level during the follow-up periods (average, 37.9 months; range, 6–76 months). Conclusion: VECF was the least in the porous Tn cage, suggesting its potential superiority for initial stability.
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