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.

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.

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.

북미에서 다이케스팅산업과 그 연구개발 동향

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

알루미늄 고압주조품의 결함종류와 기계적성질에 대한 영향

한요섭 한국주조공학회 2002 한국주조공학회지 Vol.22 No.5

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.

미디어 공신력에 따른 특집 기사와 기사형 광고의 효과 비교

김요한 한국방송광고공사 2007 광고연구 Vol.0 No.75

광고주들은 전통적 광고의 효과를 감소시키는 불안정한 광고 환경에 대처하기 위해, 자신의 마케팅 메시지를 확산시킬 수 있는 새롭고 다양한 방법을 찾고 있다. 그 중에서도 상대적으로 적은 비용을 들이면서 효과적으로 메시지를 전달하는 수단이 전통적 광고와 미디어 편집 콘텐츠를 혼합한 메시지이다. 본 연구에서는 미디어 공신력에 따라 혼합 메시지 유형간 효과 차이가 나타나는지를 살펴보고자 하였다. 연구가설검증을 위해 본 연구에서는 연구방법으로 실험연구를 선정하고, 메시지 평가와 브랜드 태도를 종속변인으로, 혼합메시지 유형(특집 기사 vs 기사형 광고)과 미디어 공신력(고 vs 저)을 독립변인으로 하는 2×2 요인설계방안을 채택하여 연구를 진행하였다. 연구결과를 요약하면 다음과 같다. 첫째, 특집 기사가 기사형 광고보다 높은 메시지 평가와 브랜드 태도를 이끌어 낼 것이라는 <연구가설 1>은 메시지 평가 중 정보성을 제외하고는 모두 채택되었다. 둘째, 혼합 메시지 유형에 따른 피험자들의 메시지 평가와 브랜드 태도는 공신력이 높은 미디어에서 차이가 더 클 것이라고 가정한 <연구가설 2>는 메시지 정보성을 제외하고는 채택되었다. 즉 특집 기사가 기사형 광고보다 메시지 재미와 브랜드 태도가 높았으며, 이 두 유형간 효과 차이는 미디어 공신력이 높을 때 더욱 큰 것으로 나타났다. 이러한 본 연구의 결과는 광고주와 실무자들에게 메시지 및 비히클 선정에 중요한 시사점을 줄 수 있을 것으로 생각한다. This study focuses on reactions toward the mixture of advertising and editorial content by media credibility. Experimental research was performed to test hypotheses. 180 subjects were conveniently sampled and randomly assigned to each four groups. This study adopted 2×2 factorial design by the message type(theme features vs advertorials) and media credibility(high vs low). Results showed that theme features generated more appreciation and higher brand attitude than advertorials. Furthermore, subjects’reactions toward mixture were influenced by the perceived credibility of the media. Specifically, mixture type had more impact on appreciation and brand attitude in a high credibility of the media than a low credibility of the media. Subjects found theme features more amusing and favorable than advertorials in a highly perceived credibility of the media. However, as opposed to a high credibility of the media, in a low credibility context, the appreciation toward the mixture and brand attitude were not significantly influenced by the mixture type.

교육ㆍ심리검사의 편중문항의 추출방법의 관한 고찰

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

반발식 자기베어링의 정적 부하특성에 관한 실험적 연구

류요한,임윤철 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2

In this study, experimental apparatus of repulsive type magnetic bearing has been made and static load characteristics are analyzed. The apparatus consists of aluminium rotor, AC electromagnets, load-cells, and air turbine. The rotational speed of rotor is controlled by compressed air and the forces due to the eddy current induced on an electrically conducting rotor are measured using two load-cells. Results show that levitation force and drag force are found to be strongly dependent with the rotor speed, thickness of the rotor, and input current but slightly influenced by the length of the rotor. Levitation force is almost linearly increased with rotor speed. However, the slope of drag force is found to be decreased as speed increased. Levitation force is proportional to the square of the input current when the rotor speed is zero.

黃龍江中流에 있어서 肝吸蟲症의 疫學的 調査硏究

鄭耀翰,文宰奎 朝鮮大學校 文理科大學 1975 論文集 Vol.2 No.-

Form 1st April to 30th October 1974, the epidemiological studies on Clonorchiasis were carried out on the 3,392 inhabitants who living in the middle area of the Hwang-Yong river. The stool specimens were examined with cellophane thick smear method and Stoll's dilution egg counting technique. The skin reaction with V. B. S. (veronal buffered saline) antigen was employed to the surveyed population. The results obtained are as follows. 1. The ova of C, sinensis was detected from 43.3% (male 47.9%, female 38.2%) of inhabitants by cellophane thick smear method and 44.7% (male 49.3%, female 39.8%) of inhabitants by skin reaction with V.B.S. antigen. 2. The infection rates by both skin reaction and cellophane thick smear method were getting higher with age and they were lower in young age groups. The infection rates were higher in male than in female by skin reaction and cellophane thick smear method. 3. The average E.P.G. was 9,103 (male 10.791 female 7,215). The average E.P.G in male was significanlty higher than in female. The average E.P.G. count of Clonorchis infection in the surveyed area was found higher among the higher age group. 4. The degree of the intensity of Clonorchis infection by E.P.G. count in the surveyed area was evenly distributed to the medium and heavy infection groups in the above 31 years old.