소나무-참나무 천연혼효림에 있어서의 수분 경쟁에 관한 연구

정동준,전상근,김영채 경희대학교 생명자원과학연구원 2000 硏究論文集 Vol.21 No.-

This study is to rationalize the forest management practice based upon the growth and water competition of pine-oak natural mixed forest stands in central part of South Korea. Average volume is 259.3 m^(3)/ha for pine stands and 150 m^(3)/ha for mixed pine stands, whereas 206.5 m^(3)/ha for pure oak stands, and 71.7 m^(3)/ha for mixed oak stands. Quadratic mean diameter and quadratic mean height, basal area, and volume decrease as the direction moves from north to south, whereas the values peak at south slope and hit the lowest at the north for oak stands. The maximum water potentials measured between 12 and 14 oclock was analyzed by stand and altitude, and by direction in case of mixed stand. Water potential of pine showed higher in both pure stands and mixed stands than oak. Especially the water potential of oak in muted stands was 3 MPa, which was lower than that of pines, -2.7 MPa. The value of two species increased as the altitude gets lower. Pine has 3.2 MPa at higher altitude, -2.4 MPa at lower altitude, which are much higher than those of oak, 3.4 MPa and 2.9 MPa at higher and lower altitudes. Soil water content was high m oak pure stands than pine pure stands or mixed stands Soil water content for each direction in mixed stands tended to decrease as slope goes from north to south. Interspecific water potential and the soil moisture content turned out to be highly correlated. Under the same soil moisture content, water potential of oak was lower that that of pine. Therefore, it seems that both pine and oak have high moisture requirement in the highly competitive southern slope and oak has higher moisture requirement than pine. It is concluded that, oak is in much competitive position than pine in terms of water competition.

남성성기능장애 환자의 우울, 불안, 스트레스 지각 및 대응전략

정헌구,정상근,황익근,박종관 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.3

남성성기능장애 환자와 정상대조군을 비교한 우울, 불안, 스트레스 지각과 남성성기능 장애 환자의 스트레스 대응전략에서 다음과 같은 결과를 얻었다. 1) 남성성기능장애 환자에서 우울과 불안의 수준이 유의하게 더 높았다. 2) 남성성기능장애 환자에서 전반적 생활에서 느끼는 스트레스에 대한 지각이 유의하게 더 높았고 특히 일과 직업, 대인관계에서 스트레스를 더 많이 지각하고 있었으며 최근 1년간의 부정적 생활 사건의 빈도가 유의하게 더 높았다. 3) 남성성기능장애 환자의 대응전략으로는 지적추구, 재정립과 순응이 많았고 대부분이 취약성을 부정하는 경향을 보였다. 배우자가 없는 남성성기능장애 환자에 비해 배우자가 있는 남성성기능장애 환자자 적극적으로 대응하며 정서적 불안정성, 불안 및 두려움이 적었다. 남성성기능장애 환자의 가장 큰 지지원은 의사였다. Thirty-one male sexual dysfunctional patients were selected to investigate their depression, anxiety, stress perception, and coping strategy. Then were examined by Beck's Depression Inventory, State-Trait Anxiety Inventory, Symptom Checklist-90-Revised, Global Assessment of Recent Stress Scale an Coping Strategy. Twenty-seven healthy normal adults were selected as control group. The results were as follows: 1) Depression and anxiety scores were significantly higher in the patients. 2) Stress perception of usual life, especially work job and change in relationships, was significantly higher in the patients. Frequency of negative life events was significantly higher in the patients. 3) As coping strategy, intellectualisation, redefinition and compliance were most frequently used by the patients. Most of the patients showed tendency to deny their vulnerabilities. Patients who lived with spouse showed more active confrontation and less emotional turmoil, anxiety and fear than patients who lived without spouse.

벤처기업의 法理

鄭相根 동아대학교 법학연구소 1998 東亞法學 Vol.- No.24

임신과 수면

정상근 大韓睡眠-精神生理學會 2002 수면·정신생리 Vol.9 No.2

척추 유합술에서 자가 이식골과 동종 이식골의 비교 : 증례보고 A Case Report

정필현,김태훈,채동주,문상호,박윤근,배호균,이재학 東國大學校 1999 東國論叢 Vol.38 No.-

척추 유합술에 있어서 자가 골 이식이 가장 좋은 방법으로 알려져 있지만 수술 시간과 실혈량이 늘어나고 공여부의 통증 및 감염의 위험등 단점으로 동종 골 이식도 많이 사용되어지고 있다. 이러한 동종 이식골의 효용성에 대해서 많은 논란이 있어온 것은 사실이나 여러 변수들, 즉 나이, 성별, 흡연력, 수술의 종류등에 따른 영향을 완전히 배제시키지 못하여 순전히 동종 이식골과 자가 이식골간의 비교가 어려웠다. 저자들은 척추관 협착증으로 후방 감압술 및 후방 기기 고정술, 후외방 골 이식술을 받은 환자에게서 우측은 자가 이식골, 좌측은 동종이식골로 골 이식을 시행한 후 4년 추시에서 자가 골 이식한 부위는 견고한 골유합 소견을 보였으나 동종골 이식 부위는 이식 골이 모두 흡수되는 소견을 체험하여 같은 조건하에서 자가 이식골이 동종 이식골보다 골유합체의 형성에 있어서 더 우수하다고 생각한다. Posterior decompression, spinal instrumentation and bone grafting are the standard operative treatment method of spinal stenosis and other low back disorders. Although autograft bone is considered the standard in performing fusion of the bone, allografts are recommended as an alternative bone graft agent becaue of the lack of complications at the donor site such as infection, increased blood loss and prolonged operative time Autografts have the other limitations because of inadequate quality and quantity. Many investigators have compared autografts and allografts in posterior spinal fusion, and there are proponents as well as opponents of allograft use. Numerous factors are thought to affect fusion, including age, sex, nutritional status, associated disease, type of fusion, length of fusion, types of instrumentation and smoking status. The validity of comparison studies between allografts and autografts is questionable when these variables are not controlled. We describe a man who had a spinal stenosis at the level of L4-5 and L5-S1. He was operated with posterior decompression, spinal instrumentation and underwent a posterolateral bone graft, comparing autografts and allografts in the same patient. At 4-year follow up, autografts have a solid union but allografts are resorbed completely.

派生商品去來의 法理論 : 先物去來를 중심으로

정상근 한국기업법학회 2003 企業法硏究 Vol.13 No.-

1) In the spot contract, buyers and sellers agree on agreement and delivery at the time. But in the forward or future contract, both determined in another time. There are time-lapse between the dates of agreement and delivery in the latter. This structure naturally expose both buyers and sellers to default risks. As a rule, futures differs from forward in that physical delivery hardly takes place, whereas actual delivery does take place in forward transactions. 2) Farmers and merchants who in the grain trade that called battaigi in Korea wish to fix the risk of price fluctuation, namely, to hedge. There are also people who are not in the grain trade are willing to assume the risk, but are not willing to take actual delivery. These are speculators who are only interesting in a possible gain from the price movement of the underlying commodities. 3) A future contract is an agreement to buy or sell a specific amount of a commodities at a particular price on a stipulated future trade. But the parties does not negotiate the terms of agreement as these are all standardised. 4) Futures and insurance are all an important tools for risk management. Futures contract is eventually zero-sum game. The loss in one is likely to offset by a gain in the other. But insurance contracts are based on statistics. The other insured in here are helpful to one. 5) Options are also like futures a way of managing and reducing risk. That are more versatile and strategic to the investor. Option purchaser is granted the privilege of buying(cal1 option) or selling(put option) a underlying commodity. If the price fluctuates, he is, as a result, more attractive than the option writer. The buyers pay the seller a fee for granting the privilege. This fee is called the premium. An option may be defined as the right, but not an obligation to buy or sell a particular item. But we must not conclude that option trade is an unequal contract. 6) Even though futures are an zero-sum game, derivatives are harmful to the parties with its complexity, market manipulation and fraud. Therefore we need an authority to supervise derivatives market. In Korea, FSS(Financial Supervisory Service) practices this function as CFTC does in the United States.

사람 末梢血液 淋巴球의 分離와 그 LDH Isoenzyme에 關하여

鄭弘根,朴壽根,崔榮,金英國,金昇元 中央醫學社 1972 中央醫學 Vol.23 No.5

The present paper describes the result obtained with lymphocytes separated from the peri - pheral humam blood by the method of Kim et. al(1970) and the LDH isoenzyme pattern of lymphocytes after sonicating the cells, which showed binomial distribution of LDH1 through LDH5, showing 11, 26, 44, 14, and 5% of activities respectively, with 56.0% of the H-subunit.

지속가능발전지표의 지수화 연구

정영근,강상목,여준호 한국환경경제학회 한국자원경제학회 2004 자원·환경경제연구 Vol.13 No.3

본 연구에서는 사회·환경·경제·제도 4개 부문의 지속가능한 발전지표들을 통합하여 지속가능발전지수 작성을 위한 방법론을 제시하고 한국의 지속가능발전 상태를 종합적으로 평가할 수 있는 지속가능발전지수를 1990~2001년간 실증적으로 계측해 보았다. 한국의 지속가능발전지수는 기준년도인 1995년을 중심으로 완만한 U자형 형태를 보이고 있는 것으로 나타났다. 지속가능발전지수가 1990년대 중반까지 하락한 주된 요인은 경제와 환경 부문의 하락에 기인하고 그 이후 상승은 사회와 제도 부문의 급격한 상승에 기인한 것으로 분석되었다. 지속가능발전지수가 주는 정책적 시사점은 첫째, 한국은 지속가능발전 측면에서 점차 긍정적인 추세를 보인다는 점과, 둘째, 지속가능발전지수의 상승과 하락이 4개 부분에 따라 사이하므로 하락하거나 보합적인 추세를 보이고 있는 부문에 대한 세심한 정책적 고려가 필요하다는 점이다. This paper develops the methodology for the indexation of Sustainable Development Indicators (SDIs) in 4 sectors (social, environmental, economic, and institutional sectors), and provides the empirical results of Sustainable Development Index (SDI) for Korea from 1990 to 2001. Given 1995 as the basic year. the trend of SDI for Korea displays a slowly curving U-shape. The down trend of SDI until mid-90's results from the decline of SDI in economic and environmental sectors, and the uptrend of SDI after mid-90's results from the sharp rising of SDI in social and institutional sectors. The implication of the results is that Korea generally shows a positive trend toward the sustainable development. However, there should be a careful consideration about partly downward trend in individual SDIs, because of the different trend of SDI in each sector.

파킨슨씨병 환자에 있어서 자가부신수질 이식술

정상섭,박상근,오성훈,김선호,윤도흠,박정수,양우익,최인준,안영수,김경환,박창일,김진수,이현철 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

Recent experimental studies and clinical cases have suggested that grafting tissue from the adrenal medulla into the brain may alleviate the symptoms of Parkinson's disease. Autologous adrenal medullary grafts into the striatum was performed stereotactically in two patients with Parkinson's disease. Both patients were bedridden preoperatively, but 4 months after the surgery both became ambulatory and one was even capable of returning to his job. Even though the number of cases was small⑵ and the follow-up period was short, this study shows that adrenal medullary transplantation into the striatum may have some beneficial effects in patient with Parkinson's disease. Further experimental and clinical trials are necessary to see whether this procedure will be a recommendable surgical treatment for patients suffering from Parkinson's disease.

정신과 약물의 부작용 : 여성에서

정상근,최재호 대한생물치료정신의학회 2003 생물치료정신의학 Vol.9 No.1

이상과 같이 임신 및 수유기간, 여성내분비 기능과 관련된 정신과 사용 약물들의 부작용과 일반적인 원칙 또는 관리방법 등에 대해 알아보았다. 무엇보다도 중요한 것은 개개인의 특정한 정신과적 질환의 약물치료와 여성 특유의 특정 상황에 대한 이해득실을 신중하게, 포괄적으로 평가하는 것이다. 정신과 의사들은 이러한 내용들을 충분히 숙지함으로서, 임상 실제 상황에서 임신, 수유, 여성내분비 기능과 관련된 부작용을 최소화하고 예방할 수 있다. The management of psychiatric problems during pregnancy and lactation represents a unique and complex clinical situation. When women take psychotropic medications in these conditions, they and their fetus or neonate may experience unwanted, adverse effects due to these medications. Inthe 1st trimester, teratogenicity is the main drug risk, in the 2-3rd trimester, growth retardation and neurological damage may occur and after birth, drug withdrawal effects may occur. Women may also experience sexual dysfunction or amenorrhea. Therefore, under the these background we reviewed adverse effects, malformations during pregnancy and lactation and female endocrine dysfunction. We also reviewed the principles and management of those situations.