불규칙파의 굴절에 관한 연구

김재중,김철현,김영의 동아대학교 건설기술연구소 1996 硏究報告 Vol.20 No.1

The concept of wave spectrum which represents the random characteristics of waves is introduced and analyzed in this study. Also time series analyses are done by using numerical model that computes the random wave transformation in the nearshore region. The characteristics of shoaling and refraction of random waves which is incident on the straight shorelines with parellel bottom contours are studied using the stecturm analysis. JONSWAP spectum in the deep water depth was converted into TMA specturn in the shallow water detph. TMA spectrum computes the spectrum of wind waves in finite water depth as a funtion of frectrum. This study way be helpful to determining the representative wave height and period for the random deseign waves of coastal structures in the shallow water.

좌심방 석회화와 관련된 반복된 좌심방 혈전 1예

김성훈,우성용,오유경,정우백,임철현,신재원,박철수,윤호중,정욱성,홍순조 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.3

代理費用과 企業의 財務政策

金喆中 홍익대학교 경영연구소 1993 경영연구 Vol.17 No.-

정신분열병 환자의 주 보호자와 형제 자매에서의 부담에 대한 연구

김철권,김진원,서지민,이길자,김길중,변원탄 大韓神經精神醫學會 2000 신경정신의학 Vol.39 No.1

연구목적: 정신분열병 환자의 가족 부담에 영향을 미치는 요인들을 알아보기 위함이다. 방 법: 92명의 정신분열병 환자의 주 보호자 92명과 그들의 형제 자매 68명을 대상으로 자가보고 척도를 사용하여 가족부담, 환자의 문제행동, 가족의 죄책감 정도를 평가하였다. 그리고 환자의 양성증상 행동과 음성증상 행동, 환자의 임상적·사회인구학적 변인, 주 보호자의 사회인구학적 변인, 그리고 가족의 죄책감 등이 주 보호자 및 형제 자매의 주관적·객관적 부담에 어떤 영향을 미치는지를 조사하였다. 결 과: 1) 객관적 부담과 주관적 부담에서 주 보호자군이 형제 자매군에 비해 약간 높은 경향을 보였지만 양군간에 유의한 차이가 없었다. 2) 정신분열병 환자의 임상적·사회인구학적 변인들 중에서는 환자의 연령, 유병기간, 총 입원기간이 주 보호자 또는 형제 자매의 부담에 유의한 영향을 주었다. 그리고 주 보호자의 사회 인구학적 변인들 중에서는 매달 수입 정도와 가족교육 여부가 주 보호자의 부담에 유의한 영향을 주었다. 3) 문제행동들을 양성증상, 음성증상, 기타증상으로 분류한 후 주 보호자 및 형제 자매의 객관적 부담과 주관적 부담과의 상관성을 검증한 결과, 양군 모두에서 3가지 증상 행동이 객관적 및 주관적 부담과 각각 유의한 상관성을 보였다. 그리고 양군에서 양성증상 행동과 음성증상 행동이 객관적 부담보다는 주관적 부담과의 상관성이 상대적으로 더 높은 양상을 보였다. 또 형제 자매의 경우에는 양성증상 행동이 음성증상 행동에 비해 객관적 및 주관적 부담과의 상관성이 더 높았다. 4) 죄책감과 부담간의 상관성에서는 주 보호자에서만 유의한 상관성을 보였다. 결 론: 본 연구 결과는 정신분열병 환자의 가족 부담을 줄일 수 있는 보다 효과적인 가족중재 기법을 개발하는데 있어 유용한 자료가 될 것으로 생각된다. In order to investigate the factors associated with family burdens of schizophrenics, 92 primary caregivers and 68 siblings of 92 persons with schizophrenia were examined by means of self-report scales about the effect of positive and negative symptom behaviors, clinical and sociodemographic variables, and guilty feelings toward patient on the objective and subjective burden. The results were as follows. 1) There was no difference in the objective and subjective burden scores between the primary caregivers and siblings, even though the former showed a higher scores compared to the latter. 2) Burden scores were significantly affected by the factors such as age of patients, duration of illness, total duration of hospitalizations, monthly family income, and the experience of family education in the primary caregivers or siblings of schizophrenics. 3) Objective and subjective burden were related to both the severity of positive, negative, and the other symptom behaviors in the primary caregivers and siblings. The positive and negative symptom behaviors were more related to subjective burdens compared to objective burdens in the primary caregivers and siblings. The positive symptom behaviors were more related to perceived objective and subjective burdens compared to negative symptom behaviors in the siblings. 4) The correlations between guilty feelings toward patient and burden scores was significant only in the primary caregivers. These results could be used as useful datas to develop the more effective family intervention for reducing family burden.

β係數를 利用한 投資決定方法에 관한 考察

金喆中 弘益大學校 1982 弘大論叢 Vol.14 No.1

The purpose of this paper is to explain the idea of Investment Decision Using β Coefficient. The theoretical framework is briefly summarized first, and then there are some computation examples of this idea. The condition that must hold if the project is to be acceptable is as follows. E(R^o_j)>R_f+[E(R_m)-R_f)β^o_j E(R^o_j) : Return on an individual project. R_f : Risk-free interest rate. E(R_m) : Return on the market. β^o_j : coefficient of an individual project. One great practical advantage of the market price of risk criterion is that all but one of its statistical factors are market constants, applicable to all firms and to all projects. But, because market price data are not available either for individual projects, the problem in this idea is the calculation of the betas for individual projects.

資本豫算 「시스템」의 精巧性과 企業收益性간의 關聯性에 관한 硏究

金喆中 홍익대학교 경영연구소 1989 경영연구 Vol.13 No.-

백서 창상의 피복방법에 따르는 Muofibroblast의 생성 및 소실되는 과정의 실험적인 비교관찰

김한중,최희윤,조철현,이인승 大韓成形外科學會 1985 Archives of Plastic Surgery Vol.12 No.1

The question of how skin coverage affects contracting wounds has long been a significant problem in the study of wound contraction. Myofibroblasts appear to be well established as the cellular cause of wound contraction. Myofibroblasts are found in many types of contracting wounds, including granulating wounds and hypertrophic burn scars. Myofibroblasts in contracting wounds have definitive life cycles, being present when contraction is active and then disappearing when contraction has ceased. In this study, we observated comparatively quantitative changes in the surface area by planimetry and changes of myofibroblasts by electron microscope through 8 weeks according to the types of skin coverage. The purpose of this study was to evaluate the myofibroblast population in skin coveraged wounds in a rat model, which allowed frequent biopsies as well as precise identificaion of the interface of the skin coverage and the wound bed. The results of our experiments are as follows: 1. Granulating wound Contracted rapidly and had long persistence of myofibroblasts. 2. Split-thickness skin graft Contrated less and myofibroblasts were more rapidly decreased and were disappeared at 5 weeks later. 3. Full-thickness skin graft Minimum contracti aondnmyofibroblasts were very rapidly decreased and were disappeared at 4 weeks later. 4. Local flap No contraction and could not find myofibroblast. Slowly increase in size at begining. 5. Contraction was influenced by number and lasting time of myofibroblast.

포오트폴리오의 成果分析에 관한 硏究 : 證券投資信託 分析을 中心으로

金建浩,金炯郁,金喆中 홍익대학교 경영연구소 1984 경영연구 Vol.8 No.-

Ⅰ. Introduction The performance evaluation of portfolio should try to access whether the right assets were chosen at the right time and how well these assets were diversified. The purpose of this paper is to explain the issues about the performance evaluation of portfolio, and to analyze the Security Investment Trust in Korea. For this purpose, first I studied the capital market theory and the theory of portfolio performance evaluation model derived from the CAPM. Second, I selected 16 stock-typed in vestment trust funds and used several models. (Fama, Sharpe, Treynor and jensen's). Ⅱ. Models and sampling. Model 1 : Fama's Excess Return=γ-_p-γ-_f. Model 2 : Sharpe's Index(RVAR)=γ-_p-γ-_f/σ_p Model 3 : Treynor's Index (RVOL)=γ-_p-γ-_f/b_p Model 4 : Jensen's Measure(α) γ-_p-γ-_f=α_i+β_p(γ-_m-γ-_f)+e_i For the empirical test, 16 stock-typed investment trust funds are selected. Time span of each date (γ-_p,γ-_m,γ-_f) is one week from Jan. 1981 to Jun. 1984. Ⅲ. Results From the regression output, Ⅰ found the following results. ①Unsystematic risk of trust funds is more than systematic risk. But fund managers have been diversified better than common investors. ② The abnormal performance results calculated for all funds during the research period indicate that the mutual funds had performance on a gross return basis. ③ Our funds have no significant relations between their performance and betas. But these results may be corrected when we take account of average dividend ratio of market and transaction costs.

IR활동이 거래회전율에 미치는 영향

金喆中 홍익대학교 경영연구소 2001 경영연구 Vol.26 No.-

財務計劃 Model에 관한 小考

金喆中 홍익대학교 경영연구소 1983 경영연구 Vol.7 No.-