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우카이 사토시(Ukai Satoshi) 부산대학교 인문학연구소 2012 코기토 Vol.- No.71
후쿠시마 핵발전소의 처참한 사고 이후 일본인들은 전력이 제한적으로 공급되는 상태에서 살고 있으며 일본 도시의 밤거리는 눈에 띄게 어두워졌다. 이 예기치 못한 변화는 일본인들에게 다니자키 준이치로가 1933년 예찬한 바 있는 ‘어둠의 문화’를 다시 생각하게 하는 효과를 가져왔다. 모로코 출신인 압델케비르 카티비는 1988년 준이치로에 대한 글을 쓴 바 있다. 필자는 카티비의 이 놀라운 글에 영감을 받아 서로 상이한 문화 간의 대화가 가능할 수 있는 조건에 대해 탐문해 보고자 한다. 상이한 문화 속에 탄생한 고전들이 머무는 장소 역시 바로 이곳일 터인데, 필자는 다니자키가 언급한 기술과 인종주의, 여성의 조건이라는 측면에서 살펴보고자 한다. Since the catastrophic accident of the nuclear plant in Fukushima, Japan lives under the electricity conservation and the streets in the city got strikingly darker. This unpredictable change gives us an occasion of remembering a whole culture of darkness praised by Tannizaki junichiro in 1933. Guided by Moroccan critic Abdelkebir Kharibi, who dedicated a brilliant essay to this Japanese writer in 1988, we tty to reflect upon the conditions of possibility of a dialogue between different cultures, the place of Classics in it, with reference to Tanakizaki’s remarks on technology, racism and female conditions.
Sekizaki, Shinya,Aoki, Mutsumi,Ukai, Hiroyuki,Sasaki, Shunsuke,Shigetou, Takaya,Wang, Weihua,Belanger, Jean 대한전기학회 2013 The Journal of International Council on Electrical Vol.3 No.4
With the increasing the number of Photovoltaic generators (PV) connected to distribution system (DS), several concerns such as rise and sudden change of voltage on distribution line are growing in Japan. Step Voltage Regulator (SVR) is well known as the one of voltage control equipment used in current DS. Meanwhile, SVR cannot regulate rapid voltage change because SVR has time delay against variation of voltage. In contrast, Static Var Compensator (SVC) is the effective device to control voltage changed rapidly. However, since the cost of SVC with large capacity is expensive, it is important to reduce the capacity of SVC in order to increase the introduction of SVC into power system. From this background, the novel control method of SVR using solar radiation information to reduce the capacity of SVC is proposed in this paper. The effectiveness of the proposed method is confirmed by numerical simulation with real time simulator.
The Effect of Leukotriene D₄on the Patency of Nasal Passage in Guinea Pigs
조중생,차장일,Kotaro Ukai,Yasuo Sakakura 대한비과학회 1995 Journal of rhinology Vol.2 No.2
Acoustic reflections have been used in adult human to determine nasal cavity dimension in terms of cross sectional area as a function of the distance from nostril. In order to measure nasal cavity dimensions in guinea pigs, we modified equipment for use in human by decreasing sound tube dimension, increasing sampling frequency, and applying a special nosepiece. The percent change of volume (VOL) from the nostril to 2cm into the nasal cavity showed significant reduction at 30 minutes and 6 hours after instillation of LTD₄ in guinea pigs. However the guinea pig instilled saline did not show any change in VOL. This result indicated that leukotriene was an potent mediator to induce nasal obstruction of late reaction in guinea pig.
Screening Test Robot for Functional Decline of Shoulder Joint
Keita Kamada,Noritaka Sato,Yoshifumi Morita,Hiroyuki Ukai,Kenji Komori,Shinya Taguchi 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
In this paper, we propose a screening test robot for prevention and early detection of functional decline of the shoulder joint. For this purpose, we used a three-dimensional reaction force display robot (3D robot) that executed a method for quantitatively evaluating shoulder joint functions. We focused on two shoulder joint functions: one is flexibility/stability, and the other is cooperativeness. In the screening test for functional decline of flexibility/stability, the 3D robot measured the maximum isometric force exerted on the brace of the 3D robot by a subject. In the screening test for functional decline in cooperativeness, the 3D robot measured the maximum isokinetic force exerted on the brace by the subject and the rotational angle of the upper limb during the testing motion. We propose procedures for implementing the two kinds of screening tests using the 3D robot, and we developed a control method. We verified the effectiveness of the proposed screening robot in executing these procedures, the control method, and the quantitative evaluation method.
Power Factor Control for Hybrid Type Power Quality Conditioner
Yamagiwa, Kyohei,Kobayashi, Yuta,Aoki, Mutsumi,Ukai, Hiroyuki,Ueda, Fukashi,Kobayashi, Hiroshi The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.4
In recent years, power quality in distribution system becomes to be greatly concerned. There are two power quality problems greatly. One is the voltage rise, the other is harmonics voltage. The voltage rise in distribution system is caused by leading current from Static Capacitors (SCs) which are widely installed at receiving points by consumers to improve power factor. Especially, the voltage rise is caused in light-load time, because of the excessive amount of SCs. On the other hand, the harmonic voltages are caused by nonlinear loads such as power electronics devices. Since harmonic currents from nonlinear loads flow through the line and transformers, the voltage is distorted. To improve those problems of power quality, Hybrid type Power Quality Conditioner (HyPQC) is proposed. HyPQC is consist of the power electronics converter and LC circuit, it could compensate the reactive current and harmonic currents from loads. In order to use for practical application, the experimental test should be performed. From this background, this paper presents the control algorithm to compensate the reactive current and harmonic currents in case of changing the loads. The simulation and experimental results are also presented using the proto type model.