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      • KCI등재후보

        비화재보를 위한 X-ray tube 내 열 유동해석에 관한 연구

        윤동민,전용한,Yun, Dong-Min,Jeon, Yong-Han 한국금형공학회 2022 한국금형공학회지 Vol.16 No.2

        Currently, Korea is an aging society, and it is expected to enter a super-aging society in about 4 years. Accordingly, many X-ray technologies are being developed. In X-rays, 99% of X-rays are converted into heat energy and 1% into light energy (X-rays). 99% of the thermal energy raises the temperature of the anode and its surroundings, and the cooling system is an important factor as overheating can affect the deterioration of X-ray quality and shortened lifespan. There is a method of forced air cooling using natural convection. Therefore, in this study, when X-rays were taken 5 times, Flow analysis was performed on heat removal according to temperature rise and cooling time for the heat generated at the anode of the X-ray tube (input power 60kW, 75kW, 90kW). Based on one-shot, the most rapid temperature rise section increased by more than 57% to 0.03 seconds, A constant temperature rises from 0.03 seconds to 0.1 seconds, It is judged that the temperature rises by about 8.2% or more at one time. After one-shot cooling, the cooling drops sharply from about 60% to 0.03 seconds, It is judged that the temperature has cooled by more than 86% compared to the temperature before shooting. One-shot is cooled by more than 86% with cooling time after 0.1 seconds, As the input power of the anode increases, the cooling temperature gradually increases. Since the tungsten of the anode target inside the X-ray tube may be damaged by thermal shock caused by a rapid temperature rise, an improvement method for removing thermal energy is required when using a high-input power supply.

      • KCI등재

        아우구스티누스를 보는 바티모의 이중적 시선

        윤동민 한국현상학회 2022 철학과 현상학 연구 Vol.95 No.-

        This paper examines Gianni Vattimo’s philosophy of religion, which is characterized by weak thought (il pensiero debole), forcusing on his dual perspective of Augustine. Although Augustine’s ideas are not a fundamental source of Vattimo’s philosophy, his view of Augustine plays a role of Archimedes’ point of view, which clearly reveals Vattimo’s own idea. This is because Vattimo regards Augustine as not only an origin of metaphysical thought but also the historical starting point where the weak thought begins. He thus unfolds his weak thought based on the latter aspect. Explaining these, I attempt to identify Augustine’s position in Vattimo’s thought and further to reveal the main framework of weak thought by comparing it with metaphysical thought. In doing so, we will consequently have an approach to Vattimo’s weak thought and post-metaphysical aspects of his project in a more sophisticated way. 본 논고는 약한 사고(il pensiero debole)로 잘 알려져 있는 지안니 바티모의 종교철학적 사상을 특별히 아우구스티누스에 대한 그의 이중적 시선을 통해 살펴본다. 아우구스티누스와 그의 사상은 바티모에게 철학적 통찰의 원천이 아니다. 하지만 바티모가 아우구스티누스를 바라보는 시선은 흥미롭게도 바티모의 사상 전체를 명확하게 드러내 보여주는 하나의 아르키메데스의 점이다. 왜냐하면 바티모는 아우구스티누스와 그의 사상을 한편으로는 형이상학적 사고로, 다른 한편으로는 그러한 사고의 약화가 시작되는 역사적 지점으로 사유하기 때문이다. 게다가 그는 후자의 측면에서 그와 같은 약화의 역사가 자신의 약한 사고로 이어진다고 생각하기도 한다. 이런 점에서 본 논고는 바티모의 사상에서 아우구스티누스의 위치를 확인하고 나아가 형이상학적인 사고와의 비교를 통해 약한 사고의 주요한 뼈대를 이루는 내용들을 노정해보고자 한다. 이를 통해 우리는 바티모의 약한 사고와 그의 기획이 가진 탈-형이상학적인 면모를 자세히 들여다볼 수 있을 것이다.

      • KCI등재

        칸트 철학의 후기-세속성에 관한 고찰:신비를 보존하기

        윤동민 광주가톨릭대학교 신학연구소 2023 神學展望 Vol.- No.220

        Immanuel Kant has been known as a representative of the secular movement since modern times until today. In particular, the distinction between knowledge and faith that he showed presented to many people to this day the standard for how to take a position on religion in the public sphere. However, Kant’s distinction can be seen as an interpretation according to the Enlightenment line that reason and knowledge should be distinguished from religion in human life. However, even though he distinguished knowledge and faith, he pursued a state of true reconciliation of reason/knowledge and religion in human life, he thinks that human life is still deeply related to religion, especially in that it presupposes the driving force of religious mystery. In this regard, I would like to examine in what ways Kant’s philosophy has been interpreted as a secular character, and in contrast, I would like to examine his major philosophical works, especially the mystical propositions that appear in religious philosophy. And based on this, I will review Kant’s philosophy in terms of weak theology that is mainly discussed in the Anglo-American world today. Through this, I would like to examine the new understanding of Kant’s philosophy, and the post- secular nature of Kant’s philosophy. 임마누엘 칸트는 근대 이후 오늘에 이르기까지 세속주의 운동의 대표자로 알려져 왔다. 특별히 그가 보여준 지식과 신앙의 구분은 오늘날까지 많은 이들에게 공론장에서의 종교에 대한 입장의 기준으로 여겨졌다. 하지만 칸트의 이와 같은 구분은 철저하게 인간의 삶에서 이성과 지식을 종교적인 것과 구분하고 위계를 설정해야 한다는 계몽주의적 노선에 따른 해석이라 볼 수 있다. 그러나 비록 칸트가 지식과 신앙을 구분했음에도, 그는 여전히 인간의 삶이 종교와 깊은 관련이 있다고 여기며, 특별히 그의 주요한 이상적 삶인 도덕적 삶의 근본에 종교적 신비를 상정한다는 점에서, 칸트는 지식과 종교의 진정한 화해를 추구했다고 볼 수 있다. 본고는 칸트 철학이 어떤 측면에서 세속적인 성격으로 해석되어 왔는지를 살펴보고, 이와는 달리 해석될 수 있는 그의 주요한 철학적 작업들에 놓여 있는 신비성 명제와 신비에 대한 논의를 고찰해 보고자 한다. 그리고 이를 바탕으로 칸트 철학을 오늘날 영미권에서 주요하게 논의되고 있는 ‘약한 신학’의 측면에서 검토할 것이다. 우리는 이 과정을 통해 칸트 철학이 가지고 있는 후기-세속주의적인 성격을 살펴봄으로써, 칸트 철학의 새로운 이해 가능성을 점검해 보고자 한다.

      • KCI등재

        중・고등학교 기초종목 운동선수의 신체조성과 체력에 관한 비교분석

        윤동민,천성욱 한국발육발달학회 2022 한국발육발달학회지 Vol.30 No.2

        This study was to compare and analyze on the body composition and physical fitness of middle and high school basic sports athletes. Middle and High school basic sports athletes who live in B city were recruited for the study. The participants were assigned into 12 groups(n=140); mddle school athletics boy(n=19), middle school athletics girl(n=19), high school athletics boy(n=18), high school athletics girl(n=4), middle school swimming race boy(n=17), middle school swimming race girl(n=14), high school swimming race boy(n=20), high school swimming race girl(n=7), middle school gymnastics boy(n=9), middle school gymnastics girl(n=7), high school gymnastics boy(n=8), high school gymnastics girl(n=7). For the statistical analysis, such as mean(M) and standard deviation(SD) was calculated using SPSS Version 24.0. To verify mean differences between the 12 groups, one-way ANOVA was used. Post hoc tests was analyzed using   . As a result of the study, a comparative analysis of body fat percentage in body composition, there was a significant difference between middle school boy (p<.05) and high school (p<.05). And lean body mass, there was a significant difference between middle school boy (p<.001) and girl (p<.01). And hand grip strength left, there was a significant difference between middle school boy (p<.01), high school girl (p<.01), and hand grip strength right, there was a significant difference between middle school boy (p<.01). And push-up, there was a significant difference between middle school boy (p<.01) and girl (p<.01), high school boy (p<.001). And standing long jump, there was a significant difference between middle school boy (p<.01). And 20 m multi-stages shuttle run, there was a significant difference between middle school girl (p<.05). And there was no significant difference in sit-up and sit and reach test and 10 m multi-staged run. Based on the research results, In order to improve body composition and physical strength that greatly affects performance for athletes, it is necessary to consider the characteristics of differences in basic sports athletes and gender. In addition, adolescence's growth period has a great influence on body composition and physical strength, suggesting the need for overall improvement through training.

      • KCI등재

        천연 복합추출물의 손상모발 개선효과

        윤동민,한상필,전용한 한국응용과학기술학회 2023 한국응용과학기술학회지 Vol.40 No.6

        In this study, NF Complex of 0%, 0.5%, 2.5%, 12.5%, and 100% was prepared by complexing and extracting Indian gooseberry, Rosa multiflora Thunberg roots, and saw palmetto fruit in a ratio of 5:1:1. The manufactured NF Complex was applied to bleached sample hair and then compared and analyzed with damaged hair. To confirm the improvement effect, tensile strength, gloss, absorbance, and brightness were measured. As a result of the measurement, the tensile strength increased. The gloss content decreased by 100%, but the remaining content increased. The change in absorbance was minimal. There was also a change in brightness, but it was minimal. It was confirmed that there is a significant difference in the average value of NF Complex, and it is judged necessary to study various ratios in the future.

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