• Journal of Ginseng Research
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• 제20권2호
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• pp.139-148
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• 1996

This study was designed to examine the effects of red ginseng total saponin and extract on spatial working memory in mice using Morris water maze. Two kinds of red ginseng saponin (No. 1 and No. 2) and three kinds of red ginseng extract (No. 1, No. 2 and No. 3) to have different PD/ PT ratio (No. 1=1.24, No.2=1.47 No.3=2.41) were prepared by mixing the different parts of red ginseng In different ratio. In acute administration of total saponin No. 1 or No. 2, escape time to reach to a hidden platform In a fixed location for training trials was significantly decreased as compared with control group and swimming time in the quadrant that had contained the platform was also significantly increased as compared with control group. In acute treatment of extract No. 1 or 1 No. 2, swimming time in the platformless quadrant was increased dose dependently as compared with control group, especially at dose of 200 mg/kg,bw swimming time was significantly Increased. Oral treatment of extract No. 1 (100 mg/kg, bw) for 7 days produced an increase of swimming time In the platformless quadrant but a decrease of swimming time in No.3-treated group (100 mg/kg, bw). These results show that red ginseng may improve spatial discrimination learning and spatial working memory of mice

• 아동학회지
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• 제26권5호
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• pp.73-87
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• 2005

To achieve in-depth understanding of the essence of the process of becoming a father, the Colazzi method for analysis of phenomenological and qualitative research was applied to examination of in-depth interviews of 7 fathers in their early twenties and thirties residing in Gwangju City. Interviews were held individually three times during $Oct{\sim}Dec$. 2004. Subjects were first time parents of babies less than 12 months of age. Results were that these first time parents' experience of fatherhood was understood in 37 themes, 13 theme clusters, and 5 categories: "beginning life treated as a father," "witnessing continuous substance of pain," "escape from family-centered life," "the baby seems to recognize me as a father," and "acquiring insight of a father."

• 한국정밀공학회지
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• 제21권12호
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• pp.21-28
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• 2004

In modem manufacturing industries such as the airplane and automobile, aluminum alloys which are remarkable in durability have been utilized effectively. High-speed machining technology for surface roughness quality of workpiece has been applied in these fields. Higher cutting speed and feedrates lead to a reduction of machining time and increase of surface quality. Furthermore, the reduction of time required for polishing or lapping of machined surfaces improves the production rate. Traditional milling process for high speed cutting can be machined with end mill tool. However, such processes are generally cost-expensive and have low material removal rate. Thus, in this paper, face milling cutter which gives high MRR has developed face milling cutter body for the high speed machining of light alloy to overcome the problems. Also vibration experiment to detect natural frequency in free state and frequency characteristics during machining are performed to escape resonance.

• 한국화재소방학회논문지
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• 제2권2호
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• pp.9-16
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• 1988

This study is intended to suggest some ideal measures available in the course of construction from the viewpoint of an architect to reduce damage of human lives and Properties caused by fire accidents in buildings. For this study, 7 buildings burnt by conflaguration in Seoul during the years of 1985 and 1987 are picked up, and 105 withnesses, who were present in one of them at them at fire, are traced for personal interview and respones to the written questionaire about 5 main issues; their perceptional behaviour, their emotional state at that time, their reactions to avoid danger, their escape routes, and their usual awareness to prevent fire. Some desirable measures suggested here are ;making Provisions to install fire centers in large buildings and underground structures in the fire fighting law, and requlating to compose fire units appropriate to the quantity of combustibles inside, limit the length of a blind corridor, furnish balustrade, and limit the width of the landing of the stairs in building code and regulations. Such measures should be considered from the time of planning to construct a building, and some drill and education in fire prevention is demanded for the occupants of the buildings too.

• KSBB Journal
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• 제17권2호
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• pp.142-147
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• 2002

기포탑 회분식 xanthan 발효에서 xanthan 생성속도와 분자량에 영향을 미치는 산소전달제한을 피하기 위하여 과산화수소수를 산소공금 보조수단으로 사용하였다. 과산화수소수 주 입은 xanthin 생성을 가역적으로 저해하였다. 반면이 직경 8 mm 유리구슬 유동화 입자는 기-액 산소전달속도를 증가시켜서 기-액-고 삼상유동충 생물반응기에서의 xanthan 발효는 기포탑 발효에 비하여 높은 단위균체량 당 xanthan 생성속도 및 점도수윤 그리고 반응기 공간-시간 수윤(space-time yield)을 보였다.

• 한국전기전자재료학회논문지
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• 제29권12호
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• pp.759-763
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• 2016

We demonstrate the utilization of ion gel gate dielectrics for operating non-volatile transistor memory devices based on polymer semiconductor thin films. The gating process in typical electrolyte-gated polymer transistors occurs upon the penetration and escape of ionic components into the active channel layer, which dopes and dedopes the polymer film, respectively. Therefore, by controlling doping and dedoping processes, electrical current signals through the polymer film can be memorized and erased over a period of time, which constitutes the transistor-type memory devices. It was found that increasing the thickness of polymer films can enhance the memory performance of device including (i) the current signal ratio between its memorized state and erased state and (ii) the retention time of the signal.

• 대한안전경영과학회지
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• 제8권3호
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• pp.37-50
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• 2006

The trends in building construction these days are moving towards having better work spaces and greater suitability for the use of information technology. Therefore people can work in a more relaxed delightful and pleasant environment. Accident such as like fire could cause the mass destruction of human beings. This paper aims to evaluate the path of the spread of a fire and the suitability of fire fighting appliances for maximum egress time. General advanced phase of compartment. Aswell, we analyzed and verified the path of the flame in compartment fires. Also we conducted an analysis of the adaptation of sprinkler systems concerned with sprinkler RTI. Moreover those evaluation is made more earlier by the development and use of computer simulation program and rapid progress to apply PBFD (Performance Based Fire Design).

• 품질경영학회지
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• 제26권1호
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• pp.126-142
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• 1998

Traditional statistical process control(SPC) assumes that consective observations from a process are independent. In industrial practice, however, observations are ofter serially correlated. A common a, pp.oach to building control charts for autocorrelatd data is to a, pp.y classical SPC to the residuals from a time series model fitted. Unfortunately, one cannot completely escape the effects of autocorrelation by using charts based on residuals of time series model. For the detection of variance change in the process we propose a CUSUM of squares control chart which does not require the model identification. The proposed CUSUM of squares chart and the conventional control charts are compared by a Monte Carlo simulation. It is shown that the CUSUM of squares chart is more effective in the presence of dependency in the processes.

• 한국실내디자인학회논문집
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• 제22권6호
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• pp.68-78
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• 2013

The purpose of this study is to investigate Seonyudo Park and Kkummaru in terms of haptic space. This is an attempt to escape from the limits of optical space that identifies the space with abstract concepts. Haptic perception of the space refers to feeling the space with all the senses through non-hierarchical interactions. Time of the haptic space is revealed by Deleuze's crystalline description and Bergson's pure recollection that is not useful to identify objects. According to two concepts, the running present forks into the past and the future, and the nature of time appears at the point of indiscernibility in which the past, present, and future coexist. Thought on time about the architecture provides a valid point of view to understand the relationship of visitor's sensory experience of space, recollection, and emotion. In this respect, it can be said that Joh sung-yong's two works explored for new areas of architectural experience by building up the potential image of the subject which is placed in the human memory. And then this study shows that two works recover the relationship between the past and the present so that they give an opportunity to consider the meaning of time in the architecture.

• 대한한의학방제학회지
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• 제11권1호
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• pp.161-170
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• 2003

This study was designed to elucidate the analgesic effects of Jakyakgamchotang and Radix paeinia, Radix Glycyrrhiziae which are the component of Jakyakgamchotang in mice. The analgesic effects were measured by the Whittle's method and hot plate method. The results were as follows ; After the administration of Jakyakgamchotang extrace, the frequency of writhing syndrome was significantly inhibited. After the administration of Radix paeinia extract, the frequency of writhing syndrome was significantly inhibited. After the administration of Radix Glycyrrhiziae extract, the frequency of writhing syndrome was significantly inhibited. After the administration of Jakyakgamchotang extrace, paw licking time and escape time were significantly prolonged. After the administration of Radix paeinia extract, paw licking time was significantly prolonged. After the administration of Radix Glycyrrhiziae extract, paw licking time was significantly prolonged. It is concluded that the analgesic effects of Jakyakgamchotang were found to be more effective than Radix paeinia and Radix Glycyrrhiziae.