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SAE 5155강의 컴퓨터부식피로 균열에 미치는 압축잔류응력의 영향
박성모(Sung-Mo Park),문광석(Kwang-Seok Moon),박경동(Kyung-Dong Park) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.2
Antifatigue failure technology take an important part of current industries. Currently, the shot peening is used for removing the defect from the surface of steel and improving the fatigue strength on surface. Therefore, this paper the effect of compressive residual stress and corrosion of spring steel(SAE 5155)by shot-peening on fatigue crack growth characteristics in stress ratio(R=0.05)was investigated with considering fracture mechanics. By using the methods mentioned above, We arrived at the following conclusions. The fatigue crack growth rate(da/dN) of the shot-peening material was lower than that of the un-peening material. And in stage Ⅰ, △Kth, the threshold stress intensity factor, of the shot-peen processed material is high in critical parts unlike the un-peening material. Also m, fatigue crack growth exponent and number of cycle of the shot-peening material was higher than that of the un-peening material. That is concluded from effect of da/dN. Finally fracture of shot-peening material and un-peening material was identified and discussed in this study.
박성모(Park, Sung Mo) 경성대학교 사회과학연구소 2015 社會科學硏究 Vol.31 No.1
현재 한국에서는 연예기획사가 기획 육성하는 아이돌 그룹이 꾸준히 증가하고 있다. 그들은 음악뿐만아니라 예능이나 연기 등 여러 방송분야에서 활동하고 있다. 그 결과 아이돌 그룹은 대중에 대한 접근성이 용이해져 인기를 누릴 수 있고, 기획사는 그들의 인기에 힘입어 부를 축적한다. 기획사의 연습생과정을 거쳐서 데뷔한 아이돌 그룹은 프리랜서로 등록되지만 계약관계에 의한 고용인이다. 기획사는 이 계약을 통해서 아이돌 그룹을 자신들에게 고용된 연예인으로 통제한다. 하지만 문화적 인지도와 아이돌 그룹소수가 획득한 부 때문에 기획사와의 고용관계에서 오는 문제는 크게 부각되지 않는다. 또 아이돌 그룹은 자신들의 목표 달성에만 관심을 가져 그들이 처한 상황을 바르게 인지하지 못하고 있다. 이는 마르크스가 논의한 자본주의에서 노동자가 겪는 소외의 과정과 다를 바 없다. 따라서 본 연구는 아이돌 그룹의 사회적 인기 때문에 은폐된 문제들을 임금노동자의 소외 개념으로 파악하려고 한다. 아이돌 그룹은 마르크스가 말한 여러 차원의 소외, 즉 생산물로부터의 소외, 활동으로부터의 소외, 유적 존재로부터의 소외, 인간관계에서의 소외를 당한다. 인기있는 소수 아이돌 그룹의 화려함 뒤에 감추어진 대다수 아이돌 그룹이 겪는 조건은 다른 산업 부문에 속한 임금노동자의 열악한 조건보다 조금도 덜하지 않다. 즉, 아이돌그룹은 인기있는 연예인의 외양을 가진 소외된 문화노동자이다. Nowadays, the number of Idol Group that Entertainment Management Company, hereinafter called as EMC or Companies, is increasing constantly in Korea. Idol Group members cover not only the music sages but also the TV programs, films and etc. In accordance with this situation, Companies accumulate capital by Idol group`s popularity because Idol Groups can reach out to the public more easily so that they can easily get public interest as well. Idol Groups that have been trained by Companies sign on the contract as a freelancer and they actually became an employee. With this contract, Companies control and regulate Idol Group as an employed entertainer. However, low awareness of culture and capital that a few group took make this relation problem between Idol Group and Companies not stand out to the public. Idol Groups themselves concentrate on their own goal so that they cannot recognize the situation they are facing. There are no differences between Alienation Process that Marx discussed and the situation Idol Groups are having problems with. Therefore, this research will consider the Idol Groups`problems concealed by the social popularity as the idea of Labour alienation. Idol Groups suffer several types of alienations which are alienation from products, production behaviors or activity, and existence of remains, human relationship. Heinous condition hidden back of a few popular Idol Groups`splendor that many of Idol Groups suffer is not better than the one that. In other words, Idol Groups are cultural workers only with a good appearance.
박성모(Park Sung-Mo),임홍철(Rhim Hong-Chul),임병호(Rhim Byung-Ho),이규동(Lee Kyu-Dong) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
Detecting the size, cover depth and arrangement of rebar in concrete structure is very principle element for structural analysis. Magnetic method is generally used for structural maintenance inspection but the criterion about the location and the count for in-situ detection is ambiguous. The result of detection is also unreliable since it depends on the ability of analyst. The purpose of the research is to suggest the standard location and count for rebar detection and increase the reliability of detection result. The experiment took place at the reconstruction site since we standardize rebar detection about deteriorating structure. Testing performed with destructive method for the comparison with actual measurement.
과당음료 투여가 최대운동부하시 운동수행력, 심폐기능, 젖산 및 염증반응에 미치는 영향
박성모(Sung-Mo Park),김병우(Byung-Woo Kim),곽이섭(Yi-Sub Kwak) 한국생명과학회 2015 생명과학회지 Vol.25 No.7
본 연구는 과당 위주의 스포츠음료 투여가 최대운동부하시 심폐기능과 젖산 및 염증반응에 미치는 영향에 대해 비교 분석하기 위해 실시되었다. 연구대상자는 D 대학교 체육학과 학생 8명으로 구성하였으며 실험시기를 2차로 나누어 스포츠 음료 투여 전과 투여 후 시기에 심폐기능과 젖산 및 염증반응 등을 비교 분석하였다. 본 연구의 결과 스포츠 음료 섭취 전과 섭취후 운동시간과 V02max, AT HRmax가 유의하게 증가하였고(p<0.05), 스포츠 음료 투여 후 회복기 20분에서 젖산 농도가 유의하게 감소되었다(p<0.05). 따라서 고강도 최대운동 전 과당위주의 스포츠 음료 투여는 운동지속시간을 늘려주고 VO2max를 높여주며, 운동 후 피로물질인 젖산축적의 빠른 회복에 도움을 줄 수 있는 것으로 사료된다. 비록 본 연구에서 염증 반응에 대한 효과를 완벽하게 규명하지는 못했지만 스포츠 음료 투여시 CRP의 농도가 감소하는 경향이 나타나 염증반응 개선에도 어느 정도 영향을 미칠 수 있을 것이라 생각된다. 추후 과당위주의 스포츠 음료투여시 염증 반응에 대한 다양한 운동 강도와 상황에서의 기전적 연구가 수행되어져야 할 것이다. The use of fructose-containing sports beverage drinks has increased in recent years, especially at sport events, because of their reported ergogenic effects. However, the ingestion of low to moderate doses of caffeinated energy drinks has been associated with adverse side effects such as insomnia or increased nervousness. The purpose of this study was to investigate the effects of fructose beverage supplementation on cardiopulmonary function, blood lactate levels, and inflammatory reactions. We recruited 8 young adult subjects from D university and measured their cardiopulmonary functions before and after supplementation with sports beverage drinks. We also measured blood lactate and inflammatory reactions after a 20 min recovery period. Exercise time, maximal oxygen uptake (V02max), and AT HRmax were significantly increased (p<0.05) in the period of before and after sports beverage supplementation. However, no significant differences were observed in RPE, AT RER, V02max RER, AT V02max, and maximum heart rate (HRmax). Lactate levels also significantly decreased after 20 min recovery with sports beverage supplementation. Sports beverage supplementation therefore may enhance maximal V02max and increase the exercise duration time. These drinks may also be helpful in promoting rapid recovery of fatigue variables and increasing exercise performance time.
콘크리트 시험체와 노후 구조물을 대상으로 한 철근탐사의 정확도 조사
박성모 ( Park Sung-mo ),임홍철 ( Rhim Hong-chul ),임병호 ( Rhim Byung-ho ),이민섭 ( Lee Min-sup ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
Nondestructive testing result usually represent the vague assumption of the position of reinforcement bars inside inhomogeneous- concrete members. Various influential factors, like concrete delamination, steel corrosion, temperature, and humidity, can affect the experimental outcome. Since testing environment of deteriorating structure is inferior, the nondestructive testing result can be differ from the result of laboratory experiment. In this study, nondestructive and partial destructive testing were executed at the deteriorating buildings of reconstruction site, and the testing result was compared with those of laboratory experiment.
박성모(Sung Mo Park) 경상대학교 사회과학연구소 2017 사회과학연구 Vol.35 No.-
At present, cultural products appearing in capitalism are not products from the beginning. If the social production of cultural practices and cultural outcomes has a capitalist form, it becomes a commodity for exchange purposes. So how is culture embedded in capitalism? To know this, we have to look at how it has historically changed since the formation of capitalism. And if we understand how these changes appear as hegemonic, we can understand that cultural products are capitalist goods. To this end, Chapter 2 of this thesis discusses the culture of capitalist formation, the changes of cultural consumption and artists. In the next chapter, we will examine how cultural products have become products of capitalism through these changes, and then identify what their ideologies are. By doing so, artists become more professionalized in the period of capitalism, and by confirming historically how the works created by them became capitalist products, it can be seen that the cultural products are now in the relation of capitalist product production.