근수축 구현 방식에 따른 레그프레스 트레이닝이 하지근력에 미치는 영향

전태원 ( Tae Won Jun ),신현정 ( Hyun Jung Sin ),김용운 ( Yong Woon Kim ),박성태 ( Sung Tae Park ) 한국운동생리학회(구 한국운동과학회) 2011 운동과학 Vol.20 No.4

전태원, 신현정, 김용운, 박성태. 근수축 구현 방식에 따른 레그프레스 트레이닝이 하지근력에 미치는 영향. 운동과학, 제20권 제4호. 397-404, 2011. 본 연구는 12주간의 레그프레스 동작을 통한 등장성 트레이닝과 등속성 트레이닝이 하지근력에 미치는 효과 차이를 분석하는 것이다. 연구대상자는 20대 젊은 성인 남성으로 규칙적인 운동 트레이닝의 경험이 없는 60명을 선정하였다. 이들을 20명씩 세 그룹으로 무선배정하여 등장성 트레이닝 집단(IT), 등속성 트레이닝 집단(IK) 그리고 통제집단(Con)으로 나누었다. 각 집단은 사전에 등장성 및 등속성 근력측정을 시행하였고, 12주 트레이닝 기간 후에 같은 측정을 시행하였다. 두 트레이닝 집단은 등장성 및 등속성 측정과 트레이닝이 동시에 가능한 장비를 이용하였으며, 통제집단은 12주간 일상생활을 유지하도록 하였다. 본 연구의 결과는 다음과 같다. 첫째, 등장성 근력측정 결과, 등장성 트레이닝집단과 등속성 트레이닝집단은 양측, 우측, 좌측 근력측정 모두에서 트레이닝 전에 비해 트레이닝 후에 최대근력의 증가를 나타내었고, 통제집단은 트레이닝 전후에 유의한 차이가 없었으며. 두 트레이닝집단 간의 유의한 차이는 나타나지 않았다. 둘째, 등속성 근력측정 결과에서도 등장성 트레이닝집단과 등속성 트레이닝집단은 모든 측정 모드와 저속, 고속측정에서 트레이닝 후에 최대근력의 증가를 나타내었고, 통제집단은 트레이닝 전후에 유의한 차이가 없었으며. 두 트레이닝집단 간의 유의한 차이는 나타나지 않았다. 결론적으로 등장성 및 등속성 레그프레스 트레이닝은 하지근력의 향상을 위한 트레이닝 방법으로 적합한 것으로 제안될 수 있다. Jun, T. W., Sin, H. J., Kim, Y. W., Park, S. T. Effect of leg press training on low-extremity muscle strength to muscle contraction modes. Exercise Science. 20(4): 397-404, 2011. The purpose of this study was to investigate the difference of low-extremity muscle strength to isotonic and isokinetic leg press training. For this purpose, sixty healthy male participants were randomly assigned to the isotonic (IT: n=20), the isokinetic (IK: n=20) and the control (Con: n=20) group. Both IT and IK groups trained their bilateral (UI), unilateral right (ULR), unilateral left (ULL) leg 3 sessions/week for 12 weeks on dynamometer with isotonic or isokinetic method, respectively. Isotonic and isokinetic tests were performed on a dynamometer before and after strength training. Significant strength increases in both two test conditions were noticed for IT and IK groups without any significant difference between the two trained groups. And there is no change in control group. In conclusion, both isotonic and isokinetic training methods could be proposed to improve muscle strength in various training fields.

고체산화물연료전지 연결재용 La_0.7Ca_0.3Cr_0.9Co_0.1O_3-_δ 조성계에 Ca Source 변화에 따른 소결 및 전기적 특성에 관한 연구

박성태,최병현,지미정,안용태,최헌진,Park, Sung-Tae,Choi, Byung-Hyun,Ji, Mi-Jung,An, Yong-Tae,Choi, Heon-Jin 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.3

Effects on sintering and electrical properties of $La_{0.7}Ca_{0.3}Cr_{0.9}Co_{0.1}O_{3-{\delta}}$ system, a interconnect material for cylindrical and flat tubular solid oxide fuel cells (SOFC), have been investigated by Ca-source when using $CaCO_3$ and $CaF_2$. When using $CaCO_3$ and $CaF_2$ was mixing as Ca-source, single phased perovskite solid solution was observed for each sample. The sintering temperature was decreased by $CaF_2$ contents was increased. When using 0.1 mole $CaF_2$ was densely sintered at $1400^{\circ}C$ and relative density was 93.8%. Also, electrical conductivity in oxidation and reducing atmosphere was 47, 4.3 S/cm, respectively, due to $F^-$ ion enhance the electrical conductivity in reducing atmosphere.

Au-conjugate 면역화학 진단용 금 나노입자 제조

박성태,이광민,Park, Sung-Tae,Lee, Kwang-Min 한국재료학회 2003 한국재료학회지 Vol.13 No.8

Current nanogold cluster synthesized by chemical routine with 11 or 55 atoms of gold has been widely used for immuno chemistry probe as a form of nanocluster conjugated with biomolecules. It would be an undeveloped region that the 1 nm size of nanogold could be made by materials engineering processing. Therefore, objective of this study is to minimize the size of gold nanocluster as a function of operating temperature and chamber pressure in inert gas condensation (IGC) processing. Evaporation temperature was controlled by input current from 50 A to 65 A. Chamber pressure was controlled by argon gas with a range of 0.05 to 2 torr. The gold nanocluster by IGC was evaluated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The gold nanocluster for TEM analysis was directly sampled with special in-situ method during the processing. Atomic force microscopy (AFM) was used to observe 3-D nanogold layer surfaces on a slide glass for the following biomolecule conjugation step. The size of gold nanoclusters had a close relationship with the processing condition such as evaporation temperature and chamber pressure. The approximately 1 nm size of nanogold was obtained at the processing condition for 1 torr at $1124 ^{\circ}C$.

정관문합술후 임신율에 영향을 미치는 인자에 관한 연구

박성태,이정구,김제종,조재흥,Park, Sung-Tae,Lee, Jeong-Gu,Kim, Je-Jong,Cho, Jae-Heug 대한생식의학회 1996 Clinical and Experimental Reproductive Medicine Vol.23 No.1

Vasectomy has become a popular method for male sterilization and this, in tum, has been followed by an increase in the number of patients requiring vasectomy reversal. Recently, many authors have reported a high success rate of vasovasostomy using microsurgical techniques. However, a significant discrepancy exist between the anatomical patency rate and pregnancy rate despite improvements in surgical techniques. Number of 420 patients who underwent vasovasostomy by a modified one layer reanastomosis from January 1986 to December 1994 were reviewed. Of the total, Complete follow up were possible in 115 patients. Of the 115 patients, 74 patients were treated by macroscopic reanastomosis, and microscopic technique were applied in 41 patients. Duration of vasal obstruction, gross apperance of vasal fluid, operative method, presence or absence of sperm and sperm granuloma, and results of postoperative semen analysis were analyzed as factors influencing the pregnancy rate. Success rates for patency and for pregnancy were 81% and, 42% respectively. Rate of pregnancy were increased if there were shorter periods of obstruction(<10years), bilateral observation of watery vasal fluid, presence of sperm bilaterally, bilateral presence of sperm granuloma at the vasectomy site, and normal results on postoperative semenalysis. With these results, we can conclude that all factors mentioned may affect the success rate of pregnancy following vasovasostomy.

편측과 양측 저항 트레이닝이 고령 여성의 하지 근력, 파워 및 비대칭지수에 미치는 영향

박성태(Sung-Tae Park) 한국생활환경학회 2014 한국생활환경학회지 Vol.21 No.5

As a training strategy for prevention of falling of the elderly, this study compared effect of unilateral resistance training with bilateral resistance training on muscle force, power and leg asymmetry during leg press movement. Twenty-three untrained elderly women(65-85 years) were participated in this study. They were randomly assigned to 3 groups: unilateral training group(UTG, n=8), bilateral training group(BTG, n=7), control(CG, n=8). Subjects in training groups followed elastic band protocol(10 exercises, 2-3 sets/exercise, 3 day/week) for 12 weeks. UTG exercised additionally more 1-2 sets in weaker leg than in stronger leg. Leg muscle force, power and leg asymmetry were measured at baseline and after training. Muscle force was increased significantly in BTG and UTG compared to CG in weaker side and bilateral side of low speed test. In high speed test, muscle force was increased significantly in BTG and UTG in weaker side. In power, UTG showed significantly increase in weaker side of low speed and stronger side of high speed. Both BTG and UTG significantly showed increase in bilateral side of low speed and weaker side of high speed. Force asymmetry was significantly decreased in UTG and BTG compared to CG in low speed and in only UTG of high speed. In conclusively, unilateral and bilateral resistance training increased muscle force and power in weaker leg. And force asymmetry was improved in both unilateral and bilateral training groups of low speed test and in only unilateral training group of high speed test.

FDR수분센서 센서간 간격에 따른 수분함량 측정값의 변화 특징

박성태(Sung Tae Park),정금향(Geum Hyang Jung),최기영(Ki Young Choi),이용범(Yong-Beom Lee),오정심(Jeong Sim Oh),유형주(Hyung Joo Yoo) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.10

벼 乾畓直播栽培時 早期湛水에 따른 벼 生育 및 雜草發生 影響

朴成泰(Sung Tae Park),黃正東(Chung Dong Hwang),黃東容(Dong Yong Hwang),孫洋(Yang Son),金純哲(Soon Chul Kim),吳潤眞(Yun Jin Oh) 韓國雜草學會 1996 Weed&Turfgrass Science Vol.16 No.3

유가증권시장과 코스닥시장 간 신규상장기업의 이익조정의 차이에 관한 연구

박성태(Sung-Tae Park),송치승(Chi-Seung Song) 한국산업경제학회 2017 산업경제연구 Vol.30 No.3

본 연구는 우리나라 유가증권시장과 코스닥시장에 각각 신규 상장한 기업들에 대한 재량적 발생액을 측정하고 이들 재량적 발생액에 영향을 미치는 제 요인들을 통제한 회귀분석모형을 설정하여 시장간 신규상장기업의 재량적 이익의 차이를 분석하였다. 분석결과, 유가증권시장과 코스닥시장 신규상장기업들은 모두 상장이전과 상장년도에 상향의 이익조정을 보이고 있고 상장이후에는 다른 형태를 보이고 있다. 유가증권시장 신규상장기업은 상장직후 1년까지도 상향의 이익조정을 보이고 있고, 이후 하향의 이익조정을 하고 있다. 반면 코스닥시장 신규상장기업은 상장이후 하향의 이익조정을 보이고 있다. 우리나라 유가증권시장은 코스닥시장보다 엄격한 상장조건을 적용하고 있다. 그럼에도 불구하고 상장직전은 물론 상장직후 유가증권시장 신규상장기업의 이익조정가능성은 코스닥시장보다 크게 나타나고 있다. 이는 재량적 발생액에 영향을 미치는 제 요인들에 대한 통제 후 분석한 회귀분석모형에서도 일관되게 나타나고 있다. 시장규제 강도가 높은 시장에의 신규상장기업이 규제강도가 낮은 시장에의 신규상장기업보다 이익조정의 정도가 높다는 사실은 매우 놀랍다. 한 국가를 대상으로 상이한 규제체계가 존재하는 시장에서 시장 간 이익조정 차이가 존재한다는 본 연구결과는 처음으로 제시된 것으로서 커다란 의미가 있다하겠다. This study is to investigate initially at home and abroad whether there are differences of earnings management around the time of IPO between KSE Market_listed and Kosdaq Market_listed firms. For the purpose of the study, this paper measures several discretionary accruals by employing accrual estimation methodology and adds to regression model which controls to the effect of several variables on earnings management. Results from the measured value and regression of earnings management on the difference between KSE Market_listed and Kosdaq Market_listed firms as follows; First, KSE Market_listed Firms have higher earnings management than Kosdaq Market_listed firms have to the previous year of IPO. Considering the fact that KSE Market has stronger regulation than Kosdaq Market has, this finding is very surprising. Second, KSE listed firms have done upward earnings management to next year of IPO(t= +1), while Kosdaq Market_listed firms have done upward earnings management at the time of IPO (t = 0) and downward earnings management since then. Third, after controlling other variables which influence discretionary earnings, MKT_dummy has a positively insignificant coefficient for (t=-1, t=+1) and VC_dummy has a negatively significant coefficient at the same time of IPO. These results from regression are consistent with those from earnings management for KSE and Kosdaq Market_listed firms. Although venture capital doesn’t have enough monitoring power for invested firms in Korea, this has an implication that there is a little difference of monitoring power between VC_backed and non-VC_ backed firms. This finding becomes contribution of this paper as a first analysis executed at home and abroad.

웨이브렛변환을 이용한 기어결함의 진단

박성태(Park Sung-Tae),김재웅(Gim Jae-Woong),양건국(Jianguo Yang) 한국소음진동공학회 2002 한국소음진동공학회 학술대회논문집 Vol.2002 No.11

사회보험 지원사업에 있어 사용자 인식에 관한 실증적 연구

박성태(Sung-Tae Park),유병남(Byung-Nam Yu) 한국산업경제학회 2014 산업경제연구 Vol.27 No.2

본 연구는 사회보험에 대한 사용자의 인식과 사회보험 가입 확대를 위한 두루누리사업에 대한 사용자의 만족도 사이의 관계성 분석을 통하여 사회보험 활성화 정책에 관한 정보와 제언을 제공하기 위하여 수행되었다. 사용자의 인식에 미치는 독립변수(사회보험에 대한 사용자의 인식, 사회보험의 사회적 위험 대비성, 사회보험 본인부담비율 등)의 효과를 분석하기 위하여 구조방정식 모델을 적용하였다. 실증분석을 통하여 응답자들은 사회보험의 효과성과 본인부담비율에 대하여 비교적 부정적 인식을 가지고 있는 것으로 조사되었다. 또한 사회보험에 대한 만족도에서는 보통수준의 인식을 가지고 있는 것으로 분석되었다. 그러나 본 조사에 참여한 사용자들은 사회적 보험 자체의 필요성에 대해서는 긍정적인 인식을 가지고 있는 것으로 조사되었다. 또한 정부가 사회보험 가입에 있어 추가적인 제도개선에 나선다면 두루누리사업에 적극적으로 참여할 의지를 가지고 있는 것으로 분석되었다. 결론적으로 사용자들은 사회보험 시스템 자체에 대하여는 긍정적 인식을 가지고 있으나 가입확대를 위해서는 좀 더 많은 지원과 위험대비 실효성이 강화되어야할 것으로 인식하고 있다. This study was conducted to provide the information on the facilitation policy of social insurance through analyzing the relationship between employer’s cognition on the social insurance and satisfaction degree of DURUNURI project. In order to analyze the effect of independent variables(employee’s cognition on the social insurance, social risk-prevent effect of social insurance, self-sharing ratio of the social insurance) on the employer’s cognition, this study applied the LISREL. By means of empirical study, samples are recognized as the relatively negative response on the effectiveness of social insurance and self-sharing ratio of the social insurance. recognized an intermediate-point response on the degree of satisfaction to the function of social insurance. However, many employers who participated in this research recognized a positive perspectives on the necessities of the social insurance system itself. Also, if the government try to develop the additional inducement of the policy, they would have a active will on the DURUNURI project. In conclusion, they have a positive philosophy on the social insurance system. However, they also have a desire for additional incentives for social insurance system.