tDCS를 결합한 고강도 인터벌 훈련이 축구선수의 유산소 운동능력에 미치는 영향

양대중 ( Dae-jung Yang ),엄요한 ( Yo-han Uhm ) 대한통합의학회 2021 대한통합의학회지 Vol.9 No.4

Purpose : This study examined the effect of transcranial direct current stimulation (tDCS) combined high intensity interval training (HIIT) on the aerobic exercise capacity of college soccer players. Methods : The subjects of this study were 30 college soccer players. They were divided into a high intensity interval training group combining transcranial direct current stimulation (Group I) and a high intensity interval training group (Group II). Each group had 15 subjects randomly assigned. After receiving general soccer training, each group additionally received high intensity interval training combined with transcranial direct current stimulation and high intensity interval training for 30 minutes 5 times a week for 8 weeks. Their VO2max and 20 meter shuttle run test, Yo-Yo intermittent recovery test were analyzed before the intervention. After 8 weeks of intervention, the above items were re-measured and an intergroup analysis was performed. Results : As a result of comparative analysis of VO2max intake between groups, 20 meter shuttle run test and Yo-Yo intermittent recovery test, a statistically significant difference was found. The high intensity interval training group (Group I) combined with transcranial direct current stimulation showed a significant difference in aerobic exercise capacity compared to the high intensity interval training group (Group II). Conclusion : These results showed that high intensity interval training group combined with transcranial direct current stimulation was more effective for aerobic exercise. Based on this study, this study proposes an effective program for patients as well as elite athletes. In the future, it is necessary to develop an effective transcranial direct current stimulation program and to study how to apply it for various patients.

플라즈마 용사법에 의한 지르코니아 5층 열장벽 피막의 고온마모 물성 및 접착강도에 관한 연구

한주철,송요승,이구현 한국항공대학교 1997 論文集 Vol.35 No.-

항공기나 자동차 에진의 내열 보호피막으로써 주목받아온 Thermal Barrier Coating(TBC)은 그 사용 영역이 디젤 엔진의 실린더 헤드나 피스톤 크라운 등으로 확대됨에 따라 고온에서의 내마모성능 또한 중요성이 커지고 있는 실정이다. 따라서 본 연구에서는 경사기능성 5층 지르코니아 열장벽의 미세구조를 비롯 고온 내마모성능, 부착강도를 시험하여 비교 평가하였다. TBC는 최상단에 100%세라믹의 단열층, 그 이하 75:25, 50:50, 25:75의 비율로 세라믹과 결합금속이 혼합된 3개의 경사기능성 중간층, 그리고 모재 직상에 피막과 모재와의 결합을 도모하기위한 100% 금속의 결합층 등, 총 5개층으로 구성하여 고온에서 발생할 수 있는 열응력을 최소화하고자 하였다. 세라믹 단열재로는 YSZ, MSZ 분말을, 결합금속으로는 NiCrAlY, Inconel 625 SUS 316을 사용하였다. 고온마모시험 결과, YSZ/NiCrAlY TBC가 600℃와 800℃에서 가장 우수한 내마모성능을 보여주었고, 400℃에서는 YSZ/Inconel TBC가 가장 적은 마모량을 나타내었다. 특히, YSZ/ NiCrAlY와 MSZ/NiCrAlY TBC의 경우, 600℃와 800℃의 마모량보다 400℃에서의 마모량이 적었으며, 이는 지르코니아의 저온열화현상에 의한 결과라 사료된다. The Thermal Barrier Coating(TBC) has been used to improve the heat barrier and wear resistant properties of the aircraft engine and the automobile engine in high temperature. Especially, the high temperature tribological properties of the cylinder head and the piston crown of diesel engine was emphasized. Therefore, the purpose of this work was to evaluate the micro structure, tribological property in high temperature and bonding strength of five layers functional gradient TBC for the application of TBC. The five layers were composed with 100% ceramic insulating layer, 75(ceramic):25(metal) layer, 50:50 layer, 25:75 layer and 100% metal bonding layer to reduce the thermal stress. The YSZ and MSZ powders were the insulation ceramics powders. The NiCrAlY, Inconel and SUS powders were the bonding and mixing powders for plasma spra process. According to the result of high temperature wear test, the wear resistance of YSZ/NiCrAlY system was most outstanding at 600 and 800℃. At 400℃, the wear resistance of YSZ/Inconel system was better than others. The amount of wear volume loss of YSZ/ NiCrAlY and MSZ/NiCrAlY TBC at 400℃ were much more than the amount of wear volume loss at other temperature because of the low temperature degradation. The bonding strength of TSZ/ NiCRAlY and YSZ/Inconel 5 layers system is better than others.

알루미늄 고압주조품의 결함종류와 기계적성질에 대한 영향

한요섭 한국주조공학회 2002 한국주조공학회지 Vol.22 No.5

질소산화물 제거를 위한 V₂O_5/TiO₂촉매 코팅된 다공성 실리카 필터의 제조 및 특성

한요섭,고재철,박영구,김승호,박재구 三陟大學校 2005 論文集 Vol.38 No.-

The prepared porous support from silica coated with TiO₂ and V₂O_(5) catalysts were studied by selective catalytic reduction of NOx with NH₃ The effects of V₂O_(5) loading, reaction temperature, space velocity and filter-type(disk and sphere) on the characteristics of NOx reduction with NH₃ were mainly investigated. At space velocity 6000h^(-1), reaction temp rature 350℃, V₂O_(5) loading 6.Owt.% and oxygen content 5%, the NOx reduction was higher to about 91%. The efficiency of porous silica on V₂O_(5)/TiO₂ catalytic disk-filter was higher than that of the V₂O_(5)/TiO₂ catalytic sphere-filter. It has been experimentally observed that the V₂O_(5)/TiO₂ catalytic disk-filter has strong resistance of gas flow.

북미에서 다이케스팅산업과 그 연구개발 동향

한요섭,이호인 한국주조공학회 2001 한국주조공학회지 Vol.21 No.6

장애학생과의 생활경험이 장애학생에 대한 일반학생의 태도에 미치는 영향

권요한,정문자 창원대학교 학생생활연구소 2001 학생생활연구 Vol.14 No.-

쥐에서 Phenobarbital Sodium 및 3-Methylcholanthrene이 ^14C-carbofuran의 대사에 미치는 영향

임요섭,한성수 한국환경농학회 2002 한국환경농학회지 Vol.21 No.1

쥐에서 carbofuran 대사에 미치는 phenobarbital sodium (PB) 또는 3-methylcholanthrene (3-MC)의 영향을 조사하기 위하여 쥐에 이들을 단독 또는 조합으로 경구투여한 후 일정 간격으로 쥐의 주요 장기, 대변, 소변 및 혈액 중 대사산물의 종류와 생성율을 조사하였다. Carbofuran 단독투여와 carbofuran과 PB 또는3-MC 조합투여 모두 경구투여 후 48시간 이내에 빠르게 배설되어 ^14C-carbofuran 총 투여량의 79.9∼81.1%가 소변으로, 5.7∼6.5%가 대변으로 배설되었는데, 배설속도는 carbofuran 단독투여보다 carbofuran과 PB 또는 3-MC 조합투여에서 빨랐다. 쥐의 주요 장기, 대소변 및 혈액 중의 carbofuran의 대사산물은 공통적으로 3-hydroxycarbofurun, 3-ketocarbofuran, 3-hydroxycarbofuran phenol, 3-ketocarbofuran phenol과 carbofuran phenol이었고, 주요 대사산물은 3-hyoxycarbofuran과 3-ketocarbofuran이었는데, 주요 대사산물의 경우 carbofuran만의 투여에서는3-hydroxycarbofuran이었으나 carbofuran과 PB 또는 3-MC 조합투여는 3-ketocarbofuran이었다. 소변 중 carbofuran의 2가지 주 대사산물의 생성율은 carbofuran 단독투여시 3-hydioxycarbofuran 17.4%와 3-ketocarbofuran 12.8%이었고, carbofuran과 PB 또는 3-MC 조합투여시 3-hydroxycarbofuran 8.6%와 3-ketocarbofuran 23.5%로서, carbofuran단독투여와 carbofuran과 PB 또는 3-MC 투여사이에 대사산물의종류는 같았으나 생성율에는 큰 차이가 있었다. 이와 같은 결과는 쥐에 carbofuran 투여 후 PB나 3-MC를 투여함으로써 carbofuran의 대사가 빠르게 이루어지고, 주 대사산물 중3-hydroxycarbofuran보다 독성이 낮은 3-ketocarbofuran으로의 대사가 빠르게 이루어지기 때문에 carbohran의 독성이 경감되어 쥐가 생존할 수 있는 것으로 판단된다. In order to elucidate the effect of phenobarbital sodium (PB) and 3-methylcholanthrene (3-MC) on metabolism of insecticide carbofuran in rat. Carbofuran metabolites and its formation rates were determined when orally administered ^(14)C-carbofuran alone and its combination with PB or 3-MC to rat. ^(14)C-carbofuran administered orally, alone or in combination with PB or 3-MC, was secreted rapidly within 48 hrs. That is, 79.9 to 81.1% of the original radioactivity was secreted into the urine and 5.7 to 6.5% into the feces. The secretion rate was faster in the combined administration than that in carbofuran alone. Metabolites of carbofuran in main organs, urine, feces and blood of rat were largely 3-hydroxycarbofuran, 3-ketocarbofuran, 3-hydroxycarbofuran phenol, 3-ketocarbofuran phenol, and carbofuran phenol, the major ones being 3-hydroxycarbofuran and 3-ketocarbofuran, respectively, in all administrations of carbofuran alone, carbofuran+PB and carbofuran+3-MC. In addition, formation rate of the two major metabolites detected in the urine was 17.4% and 12.8%, respectively, when carbofuran alone was administered. Meanwhile, when carbofuran was administered with PB or 3-MC, they were 8.6% and 23.5, repectively. These results indicate that the oral administration of PB or 3-MC can reduce carbofuran toxicity by fastening and stimulating the carbofuran metabolism in rat.

문장 종결형 '-삽'에 대하여 : 19세기 문헌 자료를 중심으로 Focusing on Written Date in 19th

장요한 국어국문학회 2004 국어국문학 Vol.- No.136

Until now, The Korean Honorific System has been discussed laying stress on the Middle Korean, the early Modern Korean and Contemporary Korean. Therefore it is the case that some phenomena of The Honorific System in the 18th and 19th century are unnoticed. This paper aims to clarify the formation of the ending ‘-삽’ and to grasp the Honorific Characteristic of it by investigating various types of ‘-삽’ sitting in the sentence ending position focusing on the literature in 19th that links the Modern Korean to the Contemporary Korean. I demonstrate the fact that ‘-삽’ and ‘하오’ coexist with 하쇼셔 style, 하오 style, and 하게 style is related to the formation of ‘-삽’ and ‘하오’. Furthermore, I explain the case that ‘-삽’ and ‘하오’ show manifold honorific characteristics by dividing the forms ‘하오’ and ‘-삽’ into two groups. The given explanation means that the Honorific System of the 19th is essentially on a stage which constructs the System of Contemporary Korean.

교육ㆍ심리검사의 편중문항의 추출방법의 관한 고찰

권요한,이영만 창원대학교 학생생활연구소 1991 학생생활연구 Vol.4 No.-

농흉 및 합병된 부폐렴성 흉수의 비디오 흉강경 치료

김요한 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Background: Surgical treatment of complicated parapneumonic effusion (PPE) and empyema is controvertial. Video-assisted thoracoscpic surgery in the treatment of complicated PPE and empyema has been demonstrated but has not been well defined. It has not been determined how to choose patients who can be treated with VATS. We report our experience in the thoracoscopic surgical management of complicated PPE and empyema with review of literatures. Material and Method: Between March 1998 and February 2003, 36 patients with complicated PPE and empyema were treated by thoracoscopic surgery. Chest sonography and chest CTscan was performed in all patients before operation. Fibrin clots and fibrinous septation can be detected in early phase of fibrouspurulent stage by chest sonography. Result: Patients consisted of 30 men and 6 women with a mean age of 58.4 years(range 31~78). General anesthesia was used in 26 patients(all double lumen endotracheal tube) and epidural anesthesia in 10 patients. 4 patients were converted to open decortication because the lung could not be mobilized suffiently to reach both the chest wall and the diaphragm. Mean operation time was 81.2±12 minutes. Chest tube was removed after 7.4±1.2 days. There was 1 hospital motality due to sepsis. All the other patients showed good postoperative courses and simple chest film revealed satisfactory lung re-expansion. Conclusion: Thoracoscopic surgery for treatment of complicated PPE and empyema shoud be done as early as possible. And chest sonography was useful in deciding the operation time.