전력증폭기 비선형 보상 기술을 고려한 PSA-QAM의 성능분석

이병로,임영희,이광석 진주산업대학교 1997 論文集 Vol.36 No.-

In land mobile communication, very extensive studies on pilot symbol assisted modulation(PSAM) have been made on fading compensation. This paper analyzes the effect of power amplifier nonlinearity on PSA-QAM with maximal ratio combining space diversity. First, to investigate performance limitation of PSAM, we analyze theoritical performance of QAM with MRC dirversity in given perfect information an fading. In practical PSAM, information for fading is obtained through interpolation of the pilot symbols. We employed the interpolation filter which could minimize the average power of error and analyzed effects on the system performance of the number of filter taps, period of the pilot symbol frame, and the Doppler frequency. Nonlinear power amplifiers of class AB, B, and C were incorporated in the system models and their AM / AM and AM / PM characteristics were taken into account in the performance analysis. We showed the performance variations according to the types of the nonlinear power amplifiers in the AWGN and Rayleigh fading channels using nonlinear compensation technique.

학교체육 활성화 방안에 대한 연구(Ⅰ) : 강원대학교 교양체육 운영방법의 개선을 중심으로

이광재,문병용,노성규,박기동,홍관이,한상준,유옥재,엄기진,정청자,오수일,김윤래,박장평,부기원 江原大學校附設 體育科學硏究所 1986 江原大學校附設體育科學硏究所論文集 Vol.- No.11

Try to find a scheme for activation to College Physical Education, this Report informs the various kinds of Survey and process those were projected for improvement of management methods on Cultural Physical Education in Kang Weon National University. From experimentally carried out "Sports events Choosing System" not as usual be inforced "Total practical Skill System", Following Positive effects and sujestions were Presented; 1. "Sports events choosing system" gave birth to more students' interesting and more voluntary participation to the sports events they chose, and sports skill and instruction level was elevated due to charge of expert according to each sports events. This system would be managed continuously hereafter for it related to life sports. 2. This System needs to closed cooperations between College and Community, for the facilities of community are utilized by college. 3. To complete the plan for activation of college Physical Education, additionally, the successional study ; namely "autonomous extracurricular sports activity" should be excuted hereafter.

성인 여성의 자궁경부암 및 유방암 조기검진 수검행위에 영향을 미치는 요인

노윤녕,김영복,박용문,이원철,맹광호 韓國保健敎育.健康增進學會 2000 보건교육건강증진학회지 Vol.17 No.1

This study was aimed at preparing basic dada required for establishment of a cancer screening program by examining the status of cancer screenings performed by women in a city and the factors that had an influence on cervical and breast cancers screening behavior of women. In order to find out the status of cervical and breast cancers screening and the factors having an influence on cervical and breast cancers screening behavior, 1,113 women were selected as study area and subjects by a random cluster sampling method, and the subjects were answered by questionnaires. The major results were as follows. 1.In the cases of the breast and the cervical cancers, 16.7% and 55.7% of the subjects turned out to have had one or more screenings respectively in their life-time. Also the rate of screening group of cervical and breast cancers was 16.7%, the rate of screening group of only cervical cancer was 38.9%, and the rate of non-screening group was 44.4%. 2.As to the screening pattern of cervical and breast cancer, there were significantly for age, income, occupation, married status, spouse, the factors associated with health promotion (doctor visiting, exercising), married age, number of children, and breast feeding(p〈0.05). 3.The factors associated with screening behaviors for cervical and breast cancers were age, income, occupation, married status, doctor visiting, exercising, married age, number of children, and breast feeding(p〈0.05). Based on the above-mentioned results obtained by this study, it was anticipated that this study may be play a vital role as basic data for the development and execution of cervical and breast cancers screening program for women in a community. And the analysis, done on the basis of the status of the cancer screening, of the influence factors on cervical and breast cancers screening behavior showed that for the development of a cancer screening program, the factors like age, social-economic class, married status, health promotion behavior, and reproductive characteristics should be considered.

댐퍼붙이 거위목바이트를 使用하는 切削系의 動的 安定性에 關한 硏究

李炯植,鄭準基,盧光春 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.2

The effect of the damped goose-neck tool upon the dynamic stability of machine tool was investigated. The dynamic stability of machine tool is directly related to the chatter in the metal cutting process. By the test of the dynamic characteristics for the damped goose-neck tool, theoretical approach of dynamic stability of machine tool is identified. It's results are compared with the results of actual cutting test. And the dynamic stability of machine tool is improved by the higher elasticity and the increase of damping coefficient for the damped goose-neck tool.

初期引張力을 받는 보의 分數調波 振動에 關한 硏究

노광춘,이규섭,박영필 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1

Subharmonic vibration of order 1/2 of a simply supported uniform beam subjected to initial tention is studied for a concentrated lateral harmonic excitation force. Theoretical analysis is carried out by assumming the deflection as a superposition of linear eigenfunctions. Harmonic balance method is used for the steady state solution. The steady state solutions are obtained by using Newton-Raphson method. Experiments are carried out and show good agreement with the theoretical results.

블루투스를 이용한 무선 헤드셋 개발

이병로,탁한호,이광석 진주산업대학교 산업과학기술연구소 2003 산업과학기술연구소보 Vol.- No.10

One of the most popular bluetooth profiles being puresd by many companies is the headset profile. The audio gateway resides on a cellular phone and the actual headset rests in the human ear. Incoming calls can be answered by the headset, either automatically or the human ear. Incoming calls can be answered by the headset, either automatically or by using manual intervention. In this paper, we present the bluetooth protocol stack and headset profile, and then develop wireless headset using MSP430, not real time operating system for bluetooth cimmunication.

裁定價格決定模型에 관한 實證

李光露 건국대학교 1987 論文集 Vol.25 No.1

The purpose of this study is to test whole validity of APM. APM is an alternative model which overcome the critical point of the CAPM, APM is based on the k-factor return generating model, and requires no utility assumption beyond monotonocity and concavity The market portfolio plays no role in this model. To test the validity of APM model itself and application in the Korean Stock Market established the following hypothesis. Hypothesis I : The variation of security returns is explained by common factors more than one. Hypothesis II : The factor structure of security returns is identical across various asset groups for the same time period. Hypothesis III : Theres is no own variance effect. Hypothesis IV : There is no firm size effect. The sample consists of 104 common stocks which listed on Korea Stock Exchange from Jan. 1981 to Dec. 1986 (72 months). The empirical result of test reveals as follows. 1) From the result of factor analysis by method of maximum liklihood factor analysis(MLFA), there were five common factors which influenced the rate of stock return. 2) As the size of sample stocks increases, the number of relevant factors increases, but the ge-neral and important common factors don't increase from the 30-factor model. 3) The size of test period did not influence factor estimation. 4) The factor structure of stock return is identical across various assets groups for the same time period. 5) There was no own variance effect by the regression of the factor loading and the standard de-viation of the average returns. 6) There is no difference in the average excessive return rate of APM for each portfolio by market value of enteprise. Therefore it did not deny the validity of APM itself. Though it contains some limitation in this study, it can be said that there is the validity of APM in Korean Stock Market.

裁定價格決定模型에 관한 理論的 硏究

李光露 건국대학교 1986 論文集 Vol.23 No.1

The objective of this study is focused on the derivation of APT model, and the comparison of CAPM and APM, its empirical tests of many savants as the preparatory step for my empirical tests about Korean capital asset market in the near future. The first chapter of this study is composed of the purpose of this study. In chapter II, it is illustrated on the derivation of arbitrage pricing model (APM), and then it is studied that APM is more general and reasonable than CAPM on the ground that CAPM is a single factor pricing model of multi-factors pricing model, APM. In chaptor III, it is analyzed about the comparison of CAPM and APM APM is similar to the CAPM in that it is also an equilibrium asset pricing model, and one factor APM is same with CAPM, in analyzing one factor such as variance of risk. But APM is the appropriate and special alternatives of CAPM because APM is not only easily extended to multi-period framework on account of contending numerous factors, butt also it allows numerous factors to explain the equilibrium return on a risky asset. In chapter IV, it was investigated into many empirical tests on APM. Results of many tests found that in determining asset return by many factors, multi factor generating model, APM was confronted with the difficult problem such as factor loadings and its analysis. And it was found also that APM was a more reasonable model for explaining the cross-sectional variation in asset returns and determining factors, and the appropriate measure of risk was the sensitivity of asset returns to changes of the factor, and while, the sensitivity was analogous to the beta of the CAPM for normally distributed returns. In the last chapter V, I conclude APT will be a most important contribution in understanding the nature of asset prices. This theory has already given us a great deal of insight into asset prices, as stated above. But empirical work on implementing APT is just the early stage. As this study is a my pre-study step on APT, I think its empirical research on the Korean capital asset market is my next subject.

Bacillus thuringiensis var. darmstadiensis 와 var. sotto의 내독소와 Bacillus thuringiensis var. kurstaki가 생산하는 아밀라제의 연구

이형환,김삼찬,황광현,임창로,조용칠,정인명 건국대학교 교육대학원 1991 敎育論叢 Vol.15 No.-

Endotoxin crystals produced by B.thuringiensis var. darmstadiensis cultured in modified GYS medium over 72 h were ovoidal in shape and separated using Renografin gradient centrifugation. The crystal protein bands were observed. When B.thuringiensis var sotto was grown in the modified GYS broth, it entered stationary phase at 8-9 h after inoculation. Proteinaceous crystals were banded at the position in 40% of Renografin gradient. The solubilized crystal proteins were formed by two bands, 130 Kd and 68 Kd in the SDS-PAGE. One plasmid was observed in B.thuringiensis var darmstadiensis and no plasmid in var. sotto in this study. Enzyme activity of amylase produced B.thuringiensis var kurstaki strain in the basal medium was 0.4 units per ml, and was enhanced to 0.6 units per ml in the basal medium contained soluble starch, Ca^++, Mg^++ and Mn^++ ions. Amylase production medium containing soluble starch was suitable for the amylase production and the highest activity appeared at 4-6 h after cultivation at 32℃. The amylase activity obtained by ethanol precipitation was 0.20 units per ml in 0.1 M phosphate buffer. The band of the molecular weight of 50 Kd was observed by SDS-PAGE analysis. Km value of the amylase for the soluble starch was 6.80 mg per ml.

最近 8年間의 精神神經科 入院 外來 및 患者에 對한 統計的 考察(1960年∼1967年)

李哲奎,盧英一,張煥一,金明源,任允明,韓東洙,吳承煥,金光日 大韓神經精神醫學會 1969 신경정신의학 Vol.8 No.1

1) The number of the out-and in-patients had increased year after year (Table Ⅰ & Ⅲ). 2) Schizophrenia was the greatest number of the in-patients and its rate to whole was 49.1 percent, and neurosis was the greatest number of the out-patients and its rate to whole was 41.66 per cent (Table Ⅰ & Ⅶ). 3) In in-patients, hysteria revealed relatively large in percentage as 11.8% than the other groups (Table Ⅰ). 4) The rate of the male hysteria patients to all male patients was 3.5 per cent and the rate of female hysteria was 20.5 per cent (Table Ⅱ). 5) In in-patients, all the patients of general paresis and alcoholism were only males in sex(Table Ⅱ). 6) In in-patients of schizophrenia, the ratio of the male patients to the female patients was 57.0 : 43.0, but the each rate of each total numbers of the all diseases of the both sexes was almost same (Table Ⅲ). 7) The largest age group of the all patients was between 21∼30 years old, and the next was between 31∼40 years in in-patients (Table Ⅲ). 8) The largest age group of schizophrenia patients was between 21∼30 years and that of M.D.R patients was between 31∼40 years in in-patients (Table Ⅲ). 9) In in-patients of hysteria, the largest age group was between 31∼40 years, and the next was between 21∼30 years (Table Ⅲ). 10) The results of treatment in in-patients were as followings; Recovered; 27.6% Much improved; 43.1% Slightly improved and no changed; 28.2% (Table Ⅳ) 11) The results of treatment in schizophrenia of the in-patients were as followings; Recovered; 19.1% Much improved; 48.3% Slightly improved and no changed; 32.1% (Table Ⅴ) 12) The mode of treatment had been somewhat changed during last 8 years from 1960 to 1967 in treatment of the in-patients (Table Ⅵ). (1) The combined therapy of tranquilizers and EST had been increased, but the therapy of tranquilizer alone or EST alone had been decreased, compared to 1960. (2) The therapy of ICT in the treatment of in-patients had been much decreased.