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대형 망원경용 FSM(Fast Steering Secondary Mirror)을 위한 팁틸트 액츄에이터의 성능평가
김호상(Ho Sang Kim),이동찬(Dong-Chan Lee),이경돈(Kyoung-Don Lee),김영수(Young-Soo Kim) Korean Society for Precision Engineering 2014 한국정밀공학회지 Vol.31 No.5
For ground-based telescope application, the performance assessment of tip-tilt actuator is important because the optical quality of telescope depends upon the windshake compensation ability of the fast steering secondary mirror. But it is difficult to measure the performance characteristics of the actuators due to the large size mirror and test facilities including the vacuum support and structural frame. In this paper, the full-scale tip-tilt test bed for the large size secondary mirror with diameter of 1m is built and the several tests are performed including the range, resolution and frequency response function. From the measurement results, it is shown that the tip-tilt actuator can successfully compensate the windshake with frequency of maximum 12 Hz and be a candidate for the Giant Magellan Telescope.
김호상 ( Kim Ho Sang ) 대구사학회 2003 대구사학 Vol.72 No.-
It is the very important part of restoring the human life of recent age that we study the Charcoal which was the most important heat energy. But the charcoal kiln of recent age has never studied because of beginning to excavate it only in these days. In this article, I considered what the stricture, location, type of the charcoal kiln was, how many types of charcoal kiln there were and what species of charcoal(wood - before being burned) there are. In this situation, after researching the typical sites which were excavated up to now, I restored its structure and then drew the sketch and arranged terms of each detailed title of the charcoal kiln. According to the types of kilns, I classified the charcoal kilns of recent age into two : a charcoal kiln built on the ground and charcoal kiln built underground. In case of a charcoal kiln built on the ground, I again classified it as 4 types and in case of a charcoal kiln built underground, I classified it as 3 types. The charcoal kiln location is possible to anywhere it has the good conditions; having convenient drainage, the proper wind direction and especially easy to gain wood. From the data that was found from the result of analyzing the charcoal material collected from inside the charcoal kiln, we came to know that wood as the kind from the oak tree was used for producing charcoal.
김호상 ( Ho Sang Kim ),조원호 ( Won Ho Cho ),허병익 ( Byeong Ik Hur ),강동완 ( Dong Wan Kang ),차승헌 ( Seung Heon Cha ),최창화 ( Chang Hwa Choi ) 대한뇌종양학회 2009 대한뇌종양학회지 Vol.8 No.2
Objective:Intracranial hemangioblastomas are benign vascular tumors arising either sporadically or as a manifestation of von Hippel-Lindau(VHL) disease. We analysed a series of patients with intracranial hemangioblastoma to review our strategy of treatment. Materials and Methods:Consecutive patients with intracranial hemangioblastoma who underwent surgery and then adjuvant therapy if needs, at our institute. Eighteen patients(14 female and 4 male patients) underwent 21 operations for removal of 19 intracranial hemangioblastoma(age at surgery 45±9.2 years, follow-up duration 37±8 months). Serial clinical examinations, imaging studies, and operative records were analyzed. Results:Twelve patients(66%) had sporadic hemangioblastomas. And six patients(34%) were von Hippel-Lindau disease. Symptoms and signs included headache(64.7%), dizziness(64.7%), gait disturbance(20%), and hydrocephalus(56%). Total resection rate was 71%(15/21). Six patients whose tumor were partially removed. Adjuvant radiosurgery was performed to 6 patients. Four patients of them were stabilized after radiosurgery. Two cystic hemangioblastoma cases were aggravated in the size of cystic portion, so revision were performed. Preoperative tumor embolization was performed in 2 cases. One VHL patient was expired due to pheochromocytoma. Conclusion:Symptoms and signs caused by intracranial hemangioblastoma can be treated safely and effectively with surgical resection. Radiosurgery may be adequate adjuvant therapy for remnant intracranial hemangioblastoma except cystic hemangioblastomas.
김호상(Ho Sang Kim),권욱동(Wook Dong Kwon),여인성(In Sung Eo),임재구(Jae Goo Lim) 한국체육철학회 2000 움직임의철학 : 한국체육철학회지 Vol.8 No.1
The purpose of this study was to investigate the possibility of application of leisure experience to existential phenomenology. The author wanted to inquire into meanings of leisure experience from the aspect of existential phenomenology. It was founded that Ponty`s body-subject and Marcel`s viewpoint of body concept offered implications in terms of three points to leisure concept. They are as follows : 1. The phenomenological concept of the Ponty`s body-subject needs to be understood as an embodied consciousness in leisure concept. For Merleau-Ponty and Gabriel Marcel, the viewpoint of body-subject means an active subject which indicates the world establishing a meaningful relationship with it. 2. From a subjective and qualitative viewpoint, leisure experience by oneself should be regarded as an important factor in itself. It suggests that unity of body and mind, self absorption and overcome, and peak experience could be obtained from leisure experience. 3. The process of leisure activities can be considered as flow experience of movement and activity which hopefully will enhance this at homeness with the environment rather than being alienated from it. This at homeness comes from a preconscious, prereflective, and intimate knowledge of our body themselves. In conclusion, the author proposes that the existential phenomenology in leisure could be perceived by themselves as embodied consciousness.