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RISS 인기검색어
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- 저자 : 김형진 ( Wan Soo Kim (검색결과 6 건)
- 무료
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- 유료
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전립선암 환자에서 Leuprolide Acetate Depot (루피어<SUP>Ⓡ</SUP> 데포주 3.75mg)의 유효성과 안전성 평가를 위한 다기관 임상시험
김형진(Hyung-Jin Kim),유정현(Chong-Hyon Ryu),이영구(Yong-Goo Lee),김청수(Choung-Soo Kim),류수방(Soo-Bang Ryu),김법완(Bup-Wan Kim),장성구(Sung-Goo Chang),김세중(Se-Joong Kim),이현무(Hyun-Moo Lee),최한용(Han-Yong Choi),홍성준(Sung-Joon 대한비뇨기종양학회 2009 대한비뇨기종양학회지 Vol.7 No.1
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회전수 및 자기장강도 변화에 따른 이중원관내 자성유체의 자연대류 열전달 특성에 관한 실험적 연구
김형진(Hyung-Jin Kim),서재형(Jae-Hyeong Seo),김대완(Dae-Wan Kim),이무연(Moo-Yeon Lee),서이수(Lee-Soo Seo) 한국자기학회 2013 韓國磁氣學會誌 Vol.23 No.2
The objective of this study is experimentally to investigate natural convective heat transfer characteristics of the ferrofluid for a concentric annuli under rotating magnetic field with variations of the revolution and the magnetic field strength. The rotating magnetic field was provided by induction motor with 6 poles and 3 phases and the revolution and the magnetic field strength were controlled by an inverter driver and a voltage meter, respectively. Temperatures of the inner pipe and the outer pipe in the tested concentric annuli were maintained at 30℃ and 25℃, respectively, during the test and the direction of the rotating magnetic field was a counterclockwise. As a result, the natural convective heat transfer characteristics of the ferrofluid for a concentric annuli were increased with the rise of the revolution and magnetic field strength due to the increased heat dissipation between hot side and cold side of the concentric annuli.
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가시화기법을 이용한 고정자장에서 이중원관내 자성유체의 열유동 특성에 관한 연구
김형진(Hyung-Jin Kim),서재형(Jae-Hyeong Seo),김대완(Dae-Wan Kim),이무연(Moo-Yeon Lee),서이수(Lee-Soo Seo) 한국자기학회 2013 韓國磁氣學會誌 Vol.23 No.1
This article is experimentally to investigate thermal-flow characteristics of the magnetic fluid for concentric annuli under externally fixed magnetic fields using visualization technique. Temperatures of the inner tube and outer tube in the tested concentric annuli were constantly maintained at both 30℃ and 25℃ and the middle tube was filled with the magnetic fluid. Magnetic field was uniformly applied using 4 permanent magnets at 4 directions of the concentric annuli. As a result, the thermal-flow characteristics of the magnetic fluid for concentric annuli could be controlled by directions of the external magnetic fields.
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체력단련(體力鍛練)이 심전도파고(心電圖波高)와 QRS벡타에 미치는 효과(效果)
유완식(Yu, Wan-Sik),황수관(Hwang, Soo-Kwan),김형진(Kim, Hyeong-Jin),주영은(Choo, Young-Eun) 대한생리학회 1984 대한생리학회지 Vol.18 No.1
장기간(長期間) 체력단련(體力鍛鍊)이 심전도파고(心電圖波高) 및 심전도(心電圖) vector에 미치는 효과(效果)를 구명(究明)하고자 10명(名)의 운동선수군(運動選手群)과 13명(名)의 비운동선수군(非運動選手群)에서 rebounder운동전후(運動前後)의 심전도파고(心電圖波高)와 QRS vector의 길이를 측정(測定)하여 분절(分折)한 결과(結果)는 다음과 같다. 심전도파고(心電圖波高)에서 R파고(波高)는 선수군(選手群)이 23.38±1.14 mm로서 비선수군(非選手群)의 17.91±2.00 mm에 비(比)해 유의(有意)하게 높았고, 운동후(運動後)에도 선수군(選手群)이 계속(繼續) 유의(有意)하게 높았다. S파고(波高)는 양군(兩群) 모두 운동후(運動後)는 안정시(安靜時)에 비(比)해 유의(有意)하게 높았으며, T파고(波高)는 운동후(運動後) 감소(減少)하였다. P파고(波高)는 양군(兩群) 모두 운동후(運動後) 증가(增加)하였으며 선수군(選手群)이 다소 낮았다. PQ분절(分節)의 파고(波高)는 선수군(選手群)은 0인데 비(比)해 비선수군(非選手群)은 negative를 나타냈으며 운동후(運動後)에 유의(有意)하게 감소(減少)하였다. J점(點)은 양군(兩群) 모두 안정시(安靜時) positive에서 운동후(運動後) 유의(有意)하게 감소(減少)하여 negative를 나타냈고, J+0.08초(秒)도 운동후(運動後) 양군(兩群) 모두 감소(減少)하였으며 선수군(選手群)이 다소 높았다. 그러므로 ST분절(分節)은 운동후(運動後) 감소(減少)함을 알 수 있다. Rv<sub>5</sub>와 Sv<sub>1</sub>의 합(合)은 선수군(選手群)이 38.74±2.71 mm로서 비선수군(非選手群)의 32.28±2.90 mm에 비(比)해 높았으며 운동후(運動後)에도 선수군(選手群)이 유의(有意)하게 높았다. QRS vector 각도(角度)에서 Frontal plane에서 선수군(選手群)이 62.7±7.36˚로서 비선수군(非選手群)과 별(別) 차이(差異)가 없었고, horizontalplane에서는 선수군(選手群)이 -23.5±7.2˚로서 비선수군(非選手群)의 -38.8±8.2˚에 비(比)해 유의(有意)하게 높았으며 운동후(運動後) 양군(兩群) 모두 유의(有意)하게 높았다. QRS vector 길이에서 Frontal plane에서 선수군(選手群)이 13.86±1.44 mm로서 비선수군(非選手群)의 9.62±0.97 mm에 비(比)해 유의(有意)하게 높았으며 운동후(運動後)에도 유의(有意)하게 높았다. Horizontal plane에서도 선수군(選手群)이 19.82±2.10 mm로서 비선수군(非選手群)의 16.90±1.39 mm에 비(比)해 유의(有意)하게 높았고 운동후(運動後)에도 선수군(選手群)이 유의(有意)하게 높았다. 이상(以上)을 종합(綜合)해 보면 선수군(選手群)의 R파고(波高)가 비선수군(非選手群)에 비(比)해 운동후(運動後) 계속(繼續) 유의(有意)하게 높았고, Rv<sub>5</sub>와 Sv<sub>1</sub>파고(波高)의 합(合)이 38.74mm정도(程度)로 좌심실(左心室)이 비대(肥大)함을 알 수 있으며, 선수군(選手群)의 PQ분절파고(分節波高)와 ST분절(分節) 파고(波高)가 비선수군(非選手群)에 비(比)해 높고 운동후(運動後)에 양군(兩群) 모두 감소(減少)한 점(點)은 주목(注目)할만한 사실(事實)이며, 특(特)히 선수군(選手群)의 QRS vector의 길이가 모두 비선수군(非選手群)에 비(比)해 유의(有意)하게 긴점등(點等)으로 좌심실기능(左心室機能)이 우수(優秀)한 스포츠심장(心臟)임을 알 수 있으며, 선수군(選手群)과 비선수군(非選手群)을 평가(評價)할 수 있는 중요(重要)한 지표(指標)가 될 것으로 사료(思料)되는 바이다. In an effort to elucidate the effect of physical training on the electrocardiographic amplitudes, QRS vector, axis and QRS vector amplitude, electrocardiograms were recorded before and 1, 5 and 10 minutes after 3 minute rebounder exercise in 23 healthy male students aged between 18 and 21 years in two groups of athletes and non-athletes. ECG amplitudes were measured from lead I, V<sub>1</sub> and V<sub>5</sub> and axis and amplitudes of QRS vectors were measured from lead I and III in frontal plane, from lead V<sub>2</sub> and lead V<sub>6</sub> in horizontal plane. The results obtained are summarized as follows. ECG amplitudes: The R wave amplitude was 23.38±1.14 mm in athletes which was higher than 17.91±2.00 mm in non-athletes. After exercise, the difference in two groups remained significant throughout the recovery period. The S wave amplitude was increased significantly, and the T wave amplitude was decreased in both groups after exercise. The P wave amplitude was increased in both groups after exercise, and it was lower in athletes than in non-athletes. The PQ segment amplitude was zero in athletes but negative in non-athletes than in the resting state. The J point amplitude was positive in resting state and was negative after exercise in both groups. J+0.08 sec point amplitude was also lowered after exercise, and it was higher in athletes than in non-athletes. Therefore the whole ST segment was proved to be decreased after exercise. The summated amplitude of R in V<sub>5</sub> plus S in V<sub>1</sub> was 38.74±2.71 mm in athletes which was higher than 32.82±2.90 mm in non-athletes. After exercise, it was also significantly higher in athletes than in non-athletes. Axis of QRS vector: In frontal plane, axis of QRS vector was 62.7±7.36˚ in athletes, it showed no significant difference between the two groups. In horizontal plane, axis of QRS vector was -23.5±7.2˚ in athletes which was significantly higher than -38.8±8.2˚ in non-athletes. After exercise, it was significantly higher than the resting state in both groups. Amplitude of QRS vector : In frontal plane, amplitude of QRS vector was 13.86±1.44 mm in athletes which was significantly higher than 9.62±0.97 mm in non-athletes. After exercise, it was also significantly higher in athletes than in non-athletes. In horizontal plane, amplitude of QRS vector was 19.82±2.10 mm in athletes which was significantly higher than 16.90±1.39 mm in non-athletes. After exercise, it was also significantly higher in athletes than in non-athletes. From the above, these results indicate that R wave amplitude in athletes was significantly higher than in non-athletes before and after exercise, and that the summated amplitude of R in V<sub>5</sub> plus S in V<sub>1</sub> in athletes was also 38.74±2.71 mm suggesting a left ventricular hypertrophy We should note that the PQ segment and ST segment amplitude were higher in athletes than in non-athletes, and they were decreased with exercise in both groups. In particular, the fact that amplitudes of QRS vector in frontal plane or in horizontal plane were significantly greater in athletes than in non-athletes may be an index in evaluating athletes.
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