著者

星 卓志 飯島 侑希子 丸岡 努 金井 寛樹 吉田 薫平

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.85, no.767, pp.89-99, 2020 (Released:2020-01-30)

参考文献数

11

被引用文献数

1

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The city to create a location optimization plan (LOP) is increasing, with the aim of forming a compact city. LOP should set the Dwelling Attraction Area (DAA) of the residential induction zone, induce residency there, and maintain the population density within the same area as the population of the entire city is reduced. As result of attracting residents and maintaining population density in DAA, outside of the residential induction zone, it becomes an area aimed at reducing the population, and there is a concern about the deterioration of the living environment. In many local medium-sized cities, suburbanization is still underway today. Moreover, there are a lot of cities where suburbs are progressing even if the total population decreases. On the other hand, in suburban areas, which were systematically developed during the rapid population growth period, there is a concern about the rapid increase in the number of vacant lots and vacant houses due to the progression of population decline and aging. Areas urbanized by sprawl, the "circulation of land use" is difficult to generate. In recent years, the occurrence of vacant houses due to the population decline in cities is an urgent issue. Therefore, it is important to understand the status of housing updates in order to consider the planning goals in suburban areas. The purpose of this study is to analyze the changes in urban areas of cities where the population of suburban areas has already be declining, and to obtain knowledge to examine urban area planning goals. As a result, the following points were clarified. In the medium-sized city of 200 to 500 thousand people, there is no city where the population is consolidating between 1995 and 2015. The change in the direction of non-consolidation is a general trend. The difference in the population density of the area where have already urbanized and the suburban area is almost a decreasing trend, and non-consolidation is progressing from this respect. Of these, in Hakodate city where the population decrease in suburban area is the most preceding, the so-called sponge making progresses in the area where have already urbanized. On the other hand, in the suburban area of Hakodate city, the renewal of urban areas and the decrease of vacant lots are progressing even if the population decline continues. In addition, in the four representative districts of the urban area type, the renewal of the house has occurred under the population decrease. At the same time, the vacant house rate has increased significantly over the last 20 years. If there is a re-tenant in the vacant house, the vacant period is about two years. From the above, the following was obtained as a finding to the planning goals of the suburban urban area in the population decrease phase in the medium-sized city. It can be said that it is difficult consolidation to reverse this direction in the tendency of the population distribution change in the urbanization promotion areas is in the suburbanization and leveling. Moreover, the renewal of the urban area in the suburban area is continued even under the population declining from the actual situation of the urban area change in Hakodate city. Even if the house does not change, the resident's replacement continues. Therefore, the sustainability as the residential area is secured without the one-sided vacant lot making and the vacant house progress.

著者

金井 寛

出版者

一般社団法人 日本生体医工学会

雑誌

BME (ISSN:09137556)

巻号頁・発行日

vol.1, no.10, pp.806-811, 1987-10-10 (Released:2011-09-21)

参考文献数

6

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本年5月, 関係者の努力が実って「臨床工学技士法」が成立した. これはクリニカルエンジニアリング (CE) 担当者の国家資格制度を定めたもので, 世界最初の制度として注目される. ここでは本法の概要と, その周辺における問題点について解説したが, 関係者各位の理解を深める一助となれば幸いである.

著者

藤井 麻美子 戸田 康永 根岸 聡 酒本 勝之 金井 寛

出版者

Japanese Society for Thermal Medicine

雑誌

日本ハイパーサーミア学会誌 (ISSN:09112529)

巻号頁・発行日

vol.13, no.1, pp.18-27, 1997-03-01 (Released:2010-01-28)

参考文献数

3

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超音波ハイパーサーミアの大きな問題点として, 音響インピーダンスの著しく異なる境界面 (肺や骨など) での発熱があげられる.この発熱は患者に激痛を与え, その結果, 目的部位を十分に加温できなくなる.そして多くの場合, 治療を中断せざるを得なくなる.そこで本研究ではこの問題を筋肉-骨境界面に限定し, その発熱の原因を数値計算とモデル実験により解析した.超音波の伝搬において, 境界面における反射・透過率, さらには伝搬の圧縮波からずり波へのモード変換などは超音波の入射角度に大きく依存するので, 特に温度分布の角度依存性に注目して検討を進めた.

著者

酒本 勝之 金子 和真 江崎 光裕 藤井 麻美子 金井 寛 浅野 次義

出版者

一般社団法人 日本生体医工学会

雑誌

医用電子と生体工学 (ISSN:00213292)

巻号頁・発行日

vol.33, no.3, pp.184-191, 1995 (Released:2011-10-14)

参考文献数

14

被引用文献数

2

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A new method (BIM) by bioelectrical impedance for the estimation of human whole body or local part fat volume is described. This method is based upon that the resistivity of adipose tissue is much greater than that of fat-free mass of which frequency characteristics shows β dispersion phenomenon. It is well known that the admittance locus of fat-free mass provides the semicircle. Because the impedance value of trunk is only 10 or 20% of the whole body impedance (Zall) between arm and leg used by the commercialized impedance fat meter, if the fat volume in the trunk increase, the estimation error in the fat volume estimated from Zall would increase. Therefore, instead of Zall, BIM adopts the impedances measured at 5 local parts which are antebrachium, brachium, trunk, femoral part and cruralis. We measured the impedance of each parts for the frequency range from 3kHz to 300kHz and calculate the admittance locus in order to obtain the conductance at much lower frequency (Ge) and much higher frequency (Ginf) than β dispersion frequency. Arms, trunk and legs are represented by parallel models which are cone shape and consists of fat layer and fat-free mass layer. And then we calculate the equivalent conductivity σ of parallel models from Ge or Ginf. From σ, fat volumes of local parts which are arm, trunk and leg and whole body are estimated. When we estimate the fat volume of trunk, in order to take into consideration the adipose tissue which distributes around organs in trunk like liver, stomach, and etc., the weighting function K which is statistically given is multiplied to the equivalent conductivity of trunk. The reference fat volume can be measured by hydrometry. We can conclude that (1) the impedance at the trunk must be measured to consider the fat volume in the trunk, (2) Ge or Ginf must be used instead of impedance at about 50kHz to estimate the fat volume, and (3) correlation coefficients between the whole fat volume measured by hydrometry and that by BIM with Ge and Ginf are about 0.77 and 0.94, respectively.

著者

晴山 典彦 藤井 麻美子 酒本 勝之 金井 寛

出版者

一般社団法人 日本生体医工学会

雑誌

医用電子と生体工学 (ISSN:00213292)

巻号頁・発行日

vol.34, no.3, pp.230-237, 1996 (Released:2011-10-14)

参考文献数

6

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It is very difficult to heat deep seated tumor surrounded by low conductivity tissues, such as bone and fat. We proposed a new RF magnetically induced method for this deep regional hyperthermia. To get high density of induced current in deep tissues, we arranged 4 coils around the sphere agar phantom. The frequency of exciting current is 13.56MHz. In this paper, we will show the calculation method of SAR distribution and temperature distribution in 3D inhomogeneous model. We also discuss the possibility of this heating method from both experiment and calculated results. In the phantom experiment we examined two types of the coils. The calculated results and experimental results show a good agreement, these therefore, the reliability of this calculation method was confirmed. The heating pattern of these coils were not very effective for deep regional hyperthermia. We also calculated temperature distribution in the brain model which was constructed from CT images. We assumed tumor in the brain with half of the blood flow compare to normal tissue. Deep seated tumor was heated by the effect of inhomogeneity and blood flow, except there were hot spots near the coil. In the case of shallow region heating, we can get effective localized heating pattern. From these results, we cannot surely say that this heating method is quite sufficient for deep regional hyperthermia. But since there is no other method to successfully heat the brain non-invasively, this kind of examination with other coil patterns must be continued.

著者

金井 寛

出版者

公益社団法人 計測自動制御学会

雑誌

計測と制御 (ISSN:04534662)

巻号頁・発行日

vol.22, no.10, pp.859-867, 1983-10-10 (Released:2009-11-26)

参考文献数

44

被引用文献数

1

著者

金井 寛

出版者

一般社団法人 日本生体医工学会

雑誌

医用電子と生体工学 (ISSN:00213292)

巻号頁・発行日

vol.20, no.3, pp.140-146, 1982-06-30 (Released:2011-03-09)

参考文献数

41

被引用文献数

1