3㎾ 멀티스트링 태양광 인버터 설계 및 시뮬레이션

이종인(Lee Jong-In),유병규(Yu Beyng-Gyu),유권종(Yu Gwen-Jong),김흥근(Kim Heung-Geun) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월

The Power Conditioning System is Power Transfer System which make array DC current to the Grid sinusoidal current. These are Low Frequency Transformer Inverter Type, High Frequency Transformer Inverter Type and Transformer-less Type. Low Frequency Transformer Type has a Excellent Isolation property, but doesn't have competitiveness in Size and Cost. Also High Frequency Transformer Type has a good Isolation property but there are many steps in Power transfer Switching. Nowadays, Transformer-less Type inverter change a transformer to DC/DC Converter which is small and cost effective. In this paper shown the DC/DC Converter Transformer-less Type multi-string inverter design and simulation. The Control Algorithm will be introduced and Simulation was accomplished.

농업 경영,정보분야의 미래유망기술 및 전략기술에 관한 우선순위 재설정 연구

이종인 ( Jong In Lee ),정윤필 ( Yun Pil Jung ),신동철 ( Dong Cheol Shin ),노성훈 ( Sung Hoon Ro ),조근태 ( Keun Tae Cho ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2009 강원 농업생명환경연구 Vol.21 No.-

The study was focused on setting priority for future core technologies in agricultural Management & Information using AHP. 20 technologies were derived by specialists meetings. Evaluation criteria for the priority setting were decided as `technology`, `market oriented`, and `public concerns`. 10 specialists in agricultural processing answered the questionnaire for AHP. As the results, `market oriented` was decided as the most important evaluation criterion. `Technology realization` in `technology` criterion, `investment profit` in `market oriented` criterion, and `spillover effects on industry` in `public concerns` criterion were decided as sub-criteria in each criterion. The most important technology was construction of effective qualify certification system for friendly-environmental Agricultural Products.

낙석방지시설 적용을 위한 팽창메탈의 특성 연구

이종인(Lee Jong-In),정춘교(Jung Chun-Gyo),김성호(Kim Sung-Ho),황영철(Hwang Yeong-Cheol),이승호(Lee Seung-Ho) 한국지반환경공학회 2011 한국지반환경공학회논문집 Vol.12 No.9

산지가 많은 우리나라는 도로 및 철도건설을 위해 사면을 형성하는 구간이 많고, 사계절의 뚜렷한 차이로 인해 해빙기에 암블록의 이완현상 발생과 연평균 강우량의 2/3 정도가 여름철에 집중 발생되는 기후특성이 있으며, 최근 기상이변에 따른 집중호우 등으로 낙석 및 산사태와 같은 도로절개면 붕괴사고가 잦은 편이며, 해마다 장마철이 되면 이와 관련된 사고소식을 매스컴을 통해 쉽게 접할 수 있다. 낙석 발생 시 인명과 재산 피해를 최소화하기 위하여 절개지에 대한 보강공법의 개발 및 현장 적용성에 대한 연구 등이 활발히 이루어지고 있지 않는 실정으로 이에 대한 연구의 필요성이 부각되고 있다. 특히 낙석방지망의 부분적 취약점(일체화가 되지 못함)으로 인해 낙석방지망이 충분한 지지능력을 발휘하지 못하는 문제가 발생됨에 따라 국내에서도 보다 높은 낙석에너지를 지지할 수 있는 낙석방지망에 대한 연구가 필요할 것으로 판단된다. 이에 본 연구에서는 낙석방지망의 대체재료로서 팽창메탈의 적용성을 실험적으로 검증하고, 그 특성에 관해 연구해 보고자 하였다. 시험결과 팽창메탈은 우수한 강도와 일체화된 재료특성으로 기존 PVC망에 비해 최대지지하중이 높게 나타났으며, 현장시험의 흡수가능에너지 또한 높게 나타나 낙석방지망의 대체재료로서 활용이 가능한 것으로 판단된다. There are many mountains in Korean Peninsula, and those used for the construction of roads and railways sectors are forming slopes. Slope collapse occurs with falling rocks and landslide because of the relaxation of the thawing rocks. The heavy rain in summer can also significantly contribute to the process, and abnormal climate change is much more influential than before. Therefore, rockfall-related accidents in rainy season are easily accessible in media every year. There has been a lot of research on application of strengthening compensation of the sections in order to minimize casualties and property damage. Rockfall Protection Net, however, has not been focused on much in the field yet. This study highlights the need of Rockfall Protection Net, since it can segregate the falling rocks inside the net relatively safely. Although there has been a little doubt about the effectiveness of rockfall protection facilities, it is obvious that relevant studies dealing with the solidity of the net are necessary for the rockfall protection net to be capable of supporting rockfall energies. As a result, Expanded metal strength is much more durable compared to the PVC coating net, and it is regarded as an excellent alternative material for the Rockfall Protection Net. In this study, the applicability of Expanded Metal as the alternative of Rockfall Protection Net is verified experimentally.

5, 18 광주민주화운동 관련인물의 미국에 대한 인식: 윤한봉과 윤상원을 중심으로

이종인 ( Jong In Lee ) 전북대학교 사회과학연구소 2012 지역과 세계 Vol.36 No.2

중국군의 베트남 침공(79.2.17)을 시작으로 소련의 아프가니스탄 침공 (79.12.24)으로 마무리 되었던 1979년 세계사의 흐름 속에서, 대한민국은 ``10·26 사건``이라는 중요한 역사적 사건을 맞이하게 된다. 그 후 박정희 정권 시절부터 군대내의 핵심 세력으로 성장한 ``신군부``주도의 ``12·12사태``와 ``5·17쿠데타``를 거쳐서 ``5·18 광주민주화운동``이라는 한국 민주화 운동 사상(史上) 중요한 사건들 중 하나로 평가되는 시기에 이르게 된다. 그리고 1982년 3월 ``부산 미문화원 방화사건``등의 일련의 사건은 80년대 반 미(反美)운동의 도화선이 됨과 동시에 1980년 5월 광주학살에서의 미국의 역할 때문에 한국민의 미국에 대한 인식이 결정적으로 변화하게 된 실체를 보여 준 사건이었다. 이처럼 1980년 5월 광주에서 일어났던 ``역사적 기억``들은 ``신군 부``, ``민중항쟁`` 등으로 기억되는 요소들 이외에 ``미국``이라는 대한민국의 현대 사에서 결코 간과할 수 없는 독립변수를 내포하고 있는 것이다. 그런데 이러한 ``논의의 주체``에 대해 살펴보던 중, 5·18 광주민주화운동과 관련하여 비슷한 것 같으면서도 아주 상반된 삶을 살았던 두 인물에 대한 학문적 호기심(Scholastic Curiosity)을 발견할 수 있었다. ``5·18 최후의 수배자`` 윤한봉(Yoon Han Bong)과``시민군대변인`` 윤상원(Yoon Sang Won)이 바로 그들이다. 이에 본 연구는 5·18 민주화운동과 밀접한 관련을 맺고 있는 이 두 사람이 ``5·18`` 이라는 사건을 통해 느꼈을 법한 지정학적 인식(Geopolitical Perception) 을 바탕으로 미국이라는 존재에 대해 고민해 보는 것을 주 목적으로 한다. 항쟁의 적극적 주체로서 활동했던 윤상원이 그 당시에는 자유민주주의를 외 쳤으나, 자신의 죽음을 통해 진정한 의미를 찾게 되었음과 동시에, 80년5월광 주의 공간에 있지 못한 죄책감으로 힘들어 했던 윤한봉의 사회운동으로 이어졌다는 역설적 상황은 5·18 광주민주화운동 관련인물에 대한 평가의 다양성이라 는 측면에서 접근하고자 했던 필자의 문제제기와 연관성을 가질 수 있다. The year of 1979, the world politics were undergoing upheavals with a series of historic events. The Chinese invasion into Vietnam came on the morning of 17 February 1979 and the Soviet Union attack on Afghanistan took place in the very same year. Korea was no exception. On October 26th, 1979, the President of South Korea, Park Chung Hee and five others including the president`s bodyguard were shot dead by the chief of his intelligence service, Kim Jea Kyu. The Yushin regime was overthrown following President Park`s assassination. After this tragic incident, with rise of the "New Military Regime", a series of historic events such as the 12.12 Military Insurrection, the military coup in 1980 and the May 18 Gwangju Democratic Movement took place in Korea. The Gwangju Democratic Movement, which was first disregarded, is now seen as one of the most important pro-democracy movements. On March, 1982, Korean college students set a fire in the U.S. Culture Center. This served as a catalyst in fueling anti-Americanism among Koreans. It also clearly showed dramatic changes in Koreans` attitude toward the U.S. after America took part in the genocide in Gwangju, a Southern Korean city, in 1980. What happened in the city was not just a reminder of the "New Military Regime" or the uprising against the military government but also the U.S.`s role in the tragic event. While reading books on the subject of the Gwangju democratic movement, I found two different persons who excited my scholastic curiosity. The two, Yoon Han Bong,"the last wanted man involved in the Gwangju democratic movement" and Yoon Sang Won, "a citizen soldier of the movement", led very different lives but shared something in common. The purpose of this paper is to shed new light on the role of the U.S. in the Gwangju democratic movement, based on the two important figures` geopolitical perception in line with the movement. The true meaning of liberal democracy could be found in the death of Yoon Sang Won who dedicated his life to liberal democracy. After all, his strong commitment toward democracy was later carried out by Yoon Han Bong who suffered from the guilt conscience for not participating in the Gwangju democratic movement. The paradoxical link between the two important figures needs to be reexamined in terms of academic diversity.

토끼 동종골이식에서 이식골편의 동결법, 동결건조법, 탈지 후 동결법 처리에 따른 신생골 형성능력 비교

이종일,송하나,김남수,최인혁,Lee, Jong-Il,Song, Ha-Na,Kim, Nam-soo,Choi, In-hyuk 대한수의학회 2007 大韓獸醫學會誌 Vol.47 No.2

Bone allograft had been increased the need because autogenous bone graft is associated with donor site morbidity and is restricted in quantity. The bone allograft implants have to prepare properly for increasing osteoinductive ability and decreasing immune responses before providing to graft. The purpose of this study was to investigate the efficacy on new bone formation in bone allografts by treatment of implants. Cortical bone allografts were transplanted to experimental defects on midshaft of diaphyseal fibulae in 15 rabbits, which were divided to 3 experimental groups according to the preparation methods-freezing, freeze-drying, defat-freezing. The grafted regions of fibulae of all groups had been radiographed biweekly for 16 weeks to observe new bone formation and union between implant and recipient bone. Bone Alkaline Phosphatase (BALP) in all groups was evaluated biweekly till the end of the experiment to determine osteoblast activities. Unions between implant and recipient bone were observed at 30% (3 of 10 cases) of freezing, 50% (5 of 10 cases) of freeze-drying and 80% (8 of 10 cases) of defat-freezing. BALP was increased over 100% from before graft at 2 weeks of graft procedures in all union cases of freezing and defat-freezing group, then gradually decreased till 16th week. In non-union cases, there is no significant variation in BALP value. Defat-freezing method for allograft implants might be more effective for osteoinductive efficacy of implants than freezing and freeze-drying method.

자가골 이식에서 이식골편의 처리방법에 따른 골형성능력 비교

이종일,송하나,김남수,최인혁,Lee, Jong-Il,Song, Ha-Na,Kim, Nam-soo,Choi, In-hyuk 대한수의학회 2007 大韓獸醫學會誌 Vol.47 No.1

Bone graft had been investigated previously to restore bone defects in orthopedics. The purpose of this study was to investigate the efficacy on new bone formation in bone autografts by treatment of implants. Cortical bone autografts were transplanted to midshaft of diaphyseal fibulae of 9 rabbits which were divided in 3 groups according to the treatment method of implants. Cortical bone implants for graft were treated with 3 different methods; freezing, freeze-drying, defat-freezing. Autografts were achieved by cross-transplantation method to bilateral fibulae of the presented rabbits after implant treatment procedures. The grafted regions of fibulae of all groups had been radiographed biweekly for 16 weeks to observe new bone formation and union between donor and recipient bone in the grafted region. Bone alkaline phosphatase (BALP) in all groups was evaluated biweekly till the end of the experiment to determine osteoblast activities. Unions of the experimental grafted regions were observed at 83% (5 of 6 cases) of freezing, 17% (1 of 6 cases) of freeze-drying and 67% (4 of 6 cases) of defat-freezing autografts, respectively. BALP was increased over 100% after 2 weeks of graft procedures in all union cases (all cases in freezing group and in defat-freezing group, and 1 of 3 in freeze-drying group, respectively), then gradually decreased from 4 th week of graft to 16 th week. In non-union cases, there is no significant variation in BALP value until the end of experiment. It is speculated that defat-freezing method of treatments of implants is more safe to preserve the osteogenic ability in autograft than freeze-drying method.

상관관계기법을 이용한 주파수 변이의 단독운전 검출기법

이종인(Lee Jong-In),유병규(Yu Beyng-Gyu),유권종(Yu Gwen-Jong),김흥근(Kim Heung-Geun) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11

Grid-connected systems operating in conjunction with a commercial system because the system protection coordination, power quality, harmonic current generation, control and islanding detection of problems and challenges are raised. Islanding detection among other things, as required by the necessity to guarantee the reliability of detection techniques has been steadily on research. In this paper, the phenomenon itself actively driving the change in frequency from the frequency variation technique and the change in cf using the correlation of the frequency change detection method is proposed and a new single operation through simulation verified the validity and effectiveness.

인공수정시술주기에서 내인성 LH, GnRH Agonist 및 hCG를 이용한 배란유발후 임신율의 비교연구

이종인,허영문,전은숙,윤정임,정구성,홍기언,유승환,이현숙,홍정의,이지삼,Lee, Jong-In,Hur, Young-Mun,Jeon, Eun-Suk,Yoon, Jeong-Im,Jung, Goo-Sung,Hong, Ki-Eon,You, Seung-Hwan,Lee, Hyeon-Sook,Hong, Jeong-Eui,Lee, Ji-Sam 대한생식의학회 1999 Clinical and Experimental Reproductive Medicine Vol.26 No.3

Objective: This study was designed to evaluate the effects of endogenous LH surge, GnRH agonist (GnRH-a) or human chorionic gonadotropin (hCG) as ovulation trigger on pregnancy rate by intrauterine insemination (IUI). Method: Patients received daily 100 mg of clomiphene citrate (CC) for 5 days starting on the third day of the menstrual cycle followed by human menopausal gonadotropin (hMG) for ovulation induction. Follicles larger than >16 mm in diameter were present in the ovary, frequent LH tests in urine were introduced to detect an endogenous LH surge. Final follicular maturation and ovulation were induced by GnRH-a 0.1 mg (s.c.) or hCG $5,000{\sim}10,000$ IU (i.m.) administration except natural ovulation. Pregnancy was classified as clinical if a gestational sac or fetal cardiac activity was seen on ultrasound. Results: There were no differences in age, duration of infertility and follicle size, but more ampules of hMG were used in GnRH-a group compared to hCG 10,000 IU treated group (p<0.05). Lower level of estradiol ($E_2$) on the day of hCG or GnRH-a injection was observed in hCG 10,000 IU group than other treatment groups (p<0.01). The overall clinical pregnancy rate was 19.8% per cycle (32/162) and 22.2% per patient (32/144). Pregnancy rate was higher in natural-endogenous LH surge group (37.5%, 9/24) than GnRH-a (18.8%) or hCG treated group (20.9% & 13.9%), but this difference was not statistically significant. No patient developed ovarian hyperstimulation. Abortion rate was 22.2% (2/9) in hCG 5,000 IU group. Delivery or ongoing pregnancy rate was 37.5% (9/24), 18.8% (3/16), 16.3% (7/43) and 13.9% (11/79) in endogenous LH surge, GnRH-a, hCG 5,000 IU and hCG 10,000 IU treatment groups, respectively. Conclusion: These results support the concept that use of natural-endogenous LH surge in stimulated cycles may be more effective to obtain pregnancies by IUI than GnRH-a or hCG administration.

신생아 외과환아에서 말초혈관을 통한 전비경구적 영양요법에 대한 고찰

이종인,정풍만,Lee, Jong-In,Jung, Poong-Man 대한소아외과학회 1998 소아외과 Vol.4 No.1

Parenteral nutrition has been an essential part of postoperative care of neonates requiring major surgery who are unable to tolerate enteral feeding for long periods during the postoperative period. However, TPN via central venous catheters(central TPN), used in increasing trend, still presents significant morbidity. To find out whether TPN via peripheral veins(peripheral TPN) could be used as a viable alternative for postoperative parenteral nutrition in neonates, a clinical study was carried out by a retrospective analysis of 53 neonates subjected to peripheral TPN for more than 7 days after surgery. Operations consisted of procedures for esophageal atresia with tracheoesophageal fistula, gastroschisis and omphalocele. Surgery was performed at the Division of Pediatric Surgery, Department of Surgery, Hanyang University Hospitall, from 1983 to 1994. The mean total duration of TPN was 13.3 days (range; 7-58 days), the average daily total fluid intake was 117.6 ml/kg during TPN and 158.6 ml/kg during subsequent oral feeding. The average daily total calorie intake was 57.7 kcal/kg during full strength TPN and 101.3 kcal/kg during subsequent oral feeding. The mean urine output was maintained at 3.5 ml/kg/ hour during TPN and at 3.6 ml/kg/hour during subsequent oral feeding. The increment of body weight observed during TPN was 132 g in TEF, 53 g in gastroschisis and 3 g in omphalocele patients, while loss of body weight was not observed. The mortality rate was 5.7 %(3/53) and was related to the underlying congenital anomalies, not the TPN. The most common complication of peripheral TPN observed was laboratory findings suggestive of liver dysfunction in 23 cases(43.4 %) with no significant clinical symptom or signs in any case, transient pulmonary edema in one case, and generalized edema in one case. None of the major complications usually expected associated with central TPN were observed. The result of this study suggest that peripheral TPN can be used for adeguate postoperative nutritional support in neonates requiring 2 to 3 weeks of TPN.

축산환경 : 고도 및 수송거리별 출하 한우의 도체특성 및 표면육색의 변화

이종인 ( Jong In Lee ),이정우 ( Jeong Woo Lee ),박병기 ( Byung Ki Park ),장용설 ( Yong Seol Jang ),최장근 ( Chang Kun Choi ),곽돈규 ( Don Kyu Kwak ),성철완 ( Cheol Wan Sung ),안준상 ( Jun Sang An ),신종서 ( Jong Suh Shin ) 한국동물자원과학회 ( 구 한국축산학회 ) 2012 한국축산학회지 Vol.54 No.1

본 연구는 고도 차이 혹은 수송 거리의 차이가 한우(거세우 및 암소)의 도체특성, 표면육색 및 혈중 cortisol 농도 변화에 미치는 영향을 검토하기 위해 실시되었다. 공시동물은 총 190두로 이중 거세한우는 118두 암소는 72두였다. 자료는 사육 고도(100, 200, 300, 400 및 500m) 혹은 수송 거리(50, 100, 150, 200 및 250 km)에 따라 분석하였다. 사육 고도의 차이가 거세한우 및 암소의 육량 및 육질 형질 변화에 미치는 영향은 적었으며, 수송 거리의 차이가 거세한우 및 암소의 육량 형질에 미치는 영향은 없는 것으로 나타났다. 또한 수송 거리의 차이가 거세한우 및 암소의 근내지방도, 육색 및 지방색에 미치는 영향과 사육 고도 혹은 수송 거리의 차이가 거세한우 및 암소 등심의 명도, 적색도, 황색도, 선명도 및 색상색에 미치는 영향은 낮은 것으로 나타났다. 암소의 경우 사육고도 100m에서 200m에 비해 등심의 명도가 증가되었으며(p<0.05), 거세한우의 경우 수송 거리 250km 그리고 암소의 경우에는 200km에서 등심의 명도가 낮아지는 경향을 보였다. 한편, 혈중 cortisol 농도는 낮은 사육 고도에 비해 높은 사육 고도에서 낮아지는 경향을 보였으나, 통계적인 유의차는 없었다. 수송 거리가 거세한우 및 암소의 cortisol 농도에 미치는 영향은 없었다. 따라서 본 연구의 결과에서 사육 고도 혹은 수송 거리가 한우의 생산성에 미치는 영향은 적은 것으로 판단된다. The purposes of the study were to examine the changes in carcass traits and surface meat color, and cortisol concentration by different altitudes and shipping distances for steer and cow. The experimental animals were shipped from Kangwondo, Kyunggido, Choongchungdo, and Kyungsangdo to Wonju LPC. The animals were examined for yield traits, quality traits, carcass grade, lightness, redness, yellowness, croma value, and cortisol concentration by different altitudes and shipping distances. The results showed that the carcass traits of steer like back fat thickness were not different by shipping distances of 100km, 150km, and 200km. However, the fat thickness was higher in steers shipped from 250km than 100km, 150km, and 200km distance. Rib- eye area was reduced significantly in 200km and 250km than 50km. Yield index and yield grade were significantly low in 250 km than 50-200km. However, meat color, fat color, texture, mature, and quality grade had no differences between shipping distances. Marbling score was not different in 50-200km. However, the marbling score in 250 km was significantly lower than that of 50 km. In case of surface meat color by shipping distance, redness, yellowness, chroma value, and hue-angle were not different in shipping distance of 250km. The lightness had similar result in 50-200 km. However, in case of 250 km the lightness was significantly low. The REA of cow carcass by shipping distance had no differences by shipping distance. The BET had similar results in 50-150km. However, it had significantly thick in 200km. The yield index and yield grade had no differences in 50-150km. However, yield index and grade were significantly low in 200km. The carcass trait of cow had no differences in all items by shipping distance. Although the carcass traits and the BET for steer by altitude had no differences between 100, 200, 300 and 500m, but those were significantly thick in 400m. And the yield index and the yield grade at altitude 400 m were lower than that of other altitudes. The quality traits and the quality grade had no differences between 100, 200, 300, 400, and 500m altitudes. The yield traits, quality traits, yield grade, and quality grade had no significant differences by altitudes. In case of yield index of cow for 300m was low than the cases of 100m and 200m. The surface meat color for steer and cow had no differences by altitudes. However, the lightness of cow had positive result in 100m than 200m and 300m. In case of steer and cow the cortisol concentration by shipping distance was high as the shipping distances were longer. However, the cortisol concentrations of steer and cow by altitudes were decreased as the altitudes were increased. From the above results carcass traits and carcass grade were decreased and the cortisol concentration was increased as the altitudes were decreased for steer and cow.