CVM모형에서의 영의 응답자료 처리 : 혼합모형을 이용하여

조승국,곽승준,유승훈 한국환경경제학회 한국자원경제학회 2003 자원·환경경제연구 Vol.12 No.3

CVM 연구에서 설문자료로부터 WTP 분포를 근사화하는 작업은 표본내에 포함된 0의 응답 때문에 문제가 발생할 수 있다. 이 때 WTP의 이중적 분포를 무시하면, 즉 연속적인 분포를 가정하면 후생치 도출에 있어 왜곡이 있을 수 있다. 본 연구는 이런 문제를 해결하기 위해 혼합모형을 제안하고 적용한다. 혼합모형은 영에서 점질량으로 이루어진 분포와 양의 연속적 분포를 혼합하는 특징을 갖고 있다. 이 경우 지불의사가 전혀 없는 확률은 모수 ρ로 표현되고, 별도로 식별가능하며, 최우추정법을 이용하면 일치추정량을 얻을 수 있다. 본 연구에서는 한려해상국립공원을 대상으로 혼합모형의 적합성에 관한 실증연구를 수행하였는데 그 결과 혼합모형의 적용이 바람직한 것으로 나타났다. Approximating a WTP distribution of the conservation for Hallyue Marine National Park is complicated by zero observations in the sample. To deal with the zero observations, a mixture model is considered to allow a point mass at zero. The model is empirically verified for the data. The conventional model and a spike model are also considered for comparison. Our results portrays the usefulness of the mixture model to analyze SBDC data with zero observations.

유아유심 개인주의

김성국(Seung Kuk Kim) 한국사회학회 2018 韓國社會學 Vol.52 No.2

탈물질주의 가치의 확산과 동아시아시대의 도래라는 문명전환기 현상을 배경으로 마음에 관한 사회학적 관심이 대두한다. 이 글의 목적은 나의 유아유심 개인주의를 김홍중의 마음의 사회학과 유승무·신종화·박수호의 마음사회학과 각각 대비시키면서 마음사회학의 발전에 기여하는 것이다. 그들과의 상이한 이론적 지향점도 제시하지만, 현세적 신비주의라는 관점에서 사회학적 파상력이나 깨달음의 문제가 서로 합류할 수 있는 가능성도 모색한다. 이 글은 개인의 마음이 지닌 무한한 능력(대상조형성과 의미생산성)을 강조하면서 허구적인 외재적 집합체(국가, 사회, 체계, 인간 등)에 대한 개인화 혹은 개인적 해체를 시도한다. 뒤르케임의 사회중심적 시각을 비판하고 루만의 체계이론과 벡의 개인화 이론을 재구성/재해석하면서 사회의 개인화나 체계의 개인화를 통해 개인적 자유와 사회적 해방의 지평을 확장해 보고자 한다. 이 글의 의미는 한국 사회학자들이 창의적으로 수립한 이론과 해석을 기반으로 동아시아(유교, 불교, 도교 그리고 천부경의) 개인주의 및 천지인합일이라는 관점에서 마음사회학의 한 형태로서 유아유심 개인주의라는 동아시아/한국형 이론을 모색하는 데 있다. Recent rise of sociological concern with ‘mind’ reflects both the coming of East Asian Era and global diffusion of post-materialist culture inherent in the ongoing civilizational transformation from modern to post-modern society. This study, with its view of an individualism of unique self/mind, aims to contribute to the development of Mind Sociology, explored by Hong Jung Kim and Seung-Mu Lew﹡Jong-Wha Shin﹡Su-Ho Park. Their studies based on Durkheimian(Kim) and Buddhist(Lew et al.) scholarships respectively are first contrasted to mine, but then their sociological conception of undulation and spiritual enlightenment is connected with my framework of secular mysticism. Individualism of unique self/mind attempts to deconstruct the collective myth of the state, society, system, and human being in terms of the infinite capacity of individual mind to construct and signify everything within its world or universe. Through this critique or reinterpretation of both Durkheimian socio-centrism/sociologism and Luhmann’s system theory as well as Beck’s individualization, it is expected to expand the sociological horizon for individual freedom and social liberation that will be encouraged by individualization of society or system. The sociological significance of this study may be found in its explorative efforts to build an East Asian and/or Korean theory of Mind Sociology, based mainly on Korean sociologists’ theories and explanations as well as East Asian (Confucian, Buddhist and Taoist) individualism and the oneness of heaven, earth, and human being.

J2EE/EJB 환경에서 컴포넌트 테스트 방법 개관

국승학,김현수 충남대학교 산업기술연구소 2005 산업기술연구논문집 Vol.20 No.1

컴포넌트 기술은 소프트웨어를 신속하고, 효과적으로 개발할 수 있는 대안으로 90년대 초반부터 각광을 받기 시작하였다. 이러한 컴포넌트 기술을 활용하는 컴포넌트 기반 개발 방법론이 현재까지 소프트웨어 산업에서의 새로운 대안으로 인식되고 있다. 현재 산업계에서는 컴포넌트 기반 개발 프레임워크 중의 하나인 J2EE를 적용한 개발이 많아지고 있다. 이는 J2EE가 단순히 컴포넌트 기반의 어플리케이션을 구현할 수 있는 수단이 될 뿐만 아니라 어플리케이션 개발 시 제공해야 하는 많은 서비스들을 J2EE 플랫폼을 통해 제공하기 때문이다. 그러나 J2EE 컴포넌트를 테스트하는 것은 기존의 자바 클래스의 테스트보다 더 많은 노력이 필요하고, 어려운 작업이기 때문에 많은 경우에 충분한 테스트를 수행하지 않는다. 많은 개발자들이 J2EE/EJB 컴포넌트를 개발할 때 고려해야 할 사항과 채택해야 하는 테스트 전략에 관해서 알지 못하기 때문이다. 이에 본 논문에서는 기존의 J2EE/EJB 컴포넌트 개발 시 고려해야 할 사항과 테스트 전략에 대해 살펴본다. Component technologies which enable quickly and effectively to develop softwares have begun to come into the spotlight since early 1990s. Nowadays a component-based development methodology using the component technologies is recognized as a new alternative to improve productivity in the software industries. Currently, a number of software development works are performed on a J2EE environment, one of component-based development frameworks. This phenomena arises from J2EE's versatility. A J2EE framework provides plentiful services required to develop component-based softwares. Thus the developers only concentrate on the implementations of business logics. But component testing is a very difficult task since it requires more efforts than the previous Java class testing. So many developers do not perform enough testing works. In fact, many developers do not know about considerations needed to implement EJB components and testing strategies used to verify the components. This paper introduces systematically testing strategies for EJB component test.

대장게실질환의 수술적 치료에 대한 임상적 고찰

민승기,박재갑,최국진,김진복 대한대장항문학회 1994 Annals of Coloproctolgy Vol.10 No.3

가변 신호시간을 갖는 개선된 신호등 시스템 설계에 관한 연구

정용국,용승일,원충상 한국교통대학교 2015 한국교통대학교 논문집 Vol.50 No.-

Current of a simple traffic light system varies in a certain direction.Standby regardless of whether a certain order to change the signal or increase the vehicle's system is inefficient.This paper tries to design and implement the system of the vehicle according to the amount of variable signal and the presence of vehicle standby.Series of logic circuits using PLD and 74 to control the order of the length of the signal, the signal circuit design.Signal was verified using a breadboard circuit is variable, depending on the amount of atmospheric presence of the vehicle and the vehicle system was implemented.

유럽인 외래관광객 유치 촉진방안에 관한 연구

최승국 한국관광정책학회 1999 觀光政策學硏究 Vol.5 No.2

In recent years just after IMF economic crisis, inbound market in Korea has recorded in a plus comparing to before ME crisis. However, inbound from Europe showed no development and rather in a decreased trend in these years. The purpose of this article is studying the reason why the inbound tourists volume show decrease and how the tourists from Europe can be increasable by any points of promotional strategy. For this purpose, an Empirical investigation has made during September 1999 for the European visitors selected by 5 majors of inbound travel agencies in Seoul. On this investigation, Four steps of Tourist Behavior's theory by which has applied, Clawson are adopted in examining the determinant sectors of traveling other countries. The major results are as follows. 1. Tour items suitable to European tourists should be developed soon because tour items advertised by Korean travel agencies are not so enough to decide easily for traveling to Korea. Also developing the symbols of Korea be required. 2. Strategical advertisement for Korea are required from the tour planning stage to the time of return for tourist. 3. Major complaints like medium priced hotel, unkindness of taxi drivers, toilets facilities, short of travel sign board and others factors have to be considerable in policy. 4. Task-force team for having the effective market policy should be carried out between goverment, travel agencies and KNTO. 5. We need to broaden the ideas of Europe to Middle East and Africa as most of Africans' and Middle East countries had been under the colonization of European countries. Accordingly, developing these countries which are, so-called, sun-rising market in tourism are much helpful if we devlope the European tourists strategically. Finally, somebody say that this coming New-Millenium is the age of tourism. In order to greet the New-Millenium with the hopeful tourism vision, promotional strategy in tourism is to be performed soon.

大學生의 不適應에 관한 社會學的 考察

金成國,黃甲鎭 부산대학교 학생생활연구소 1984 硏究報 Vol.20 No.1

Although prior studies analyze student's adjustment to college exclusively in psychological terms, the adjustment process consists of a range of dimensions. This study develops a sociological approach to the adjustment problem. More specifically, the present study identifies three types of maladjustment (related with learning problems, difficulty in campus life, and student activism, respectively). It also specifies major sources of maladjustment such as individual characteristics (including personality, family background, the organization of university, social structural environment). Empirically, correlation and regression analysis (using a simple recursive path model) show several interesting results: ① The pattern of causal relationship differs according to the types of the maladjustment. ② Self-esteem plays a very important role in explaining the maladjustment. Regardless of maladjustment types, its causal effects are consistently shown. ③ Students' evaluation of politic-economic situation is the most important predictor of their attitude about the student movement. ④ Our measure of the maladjustment is moderately correlated with social psychological measures such as alienation scale and symptom check List-90. In conclusion, it is suggested that future student guidance should be specified to correspond to different types of maladjustment.

산업용 로봇의 일정한 방향성 생성

이승황,양승한,박용국 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.2

In general, there are many degrees of freedom(DOFs) in industrial robot. So they have many poses of several special end-effector's positions and orientations. For that reason, industrial robots are used in a wide scope of industrial applica-tions such as welding, spray painting, deburring, and so on. In this research, an off-line continuous path planning method based on linear interpolation with parabolic blend is developed. The method safely maintains the constant orientation for base frame and end-effector's path within allowable error and minimizes the number of segments in path. This algorithm may apply to welding and painting in which the orientation is particularly significant. The simulation study of cartesian curve is carried out to show the performance of this algorithm.

최대운동부하시 단련자와 비단련자의 호흡순환기능 비교연구

유승희,김복현,송종국,윤형기,박찬호 경희대학교 체육과학연구소 1996 體育學論文集 Vol.24 No.-

We studied the differences of cardiorespiratory function of the untrained group and the trained group. The findings are following: 1.In ventilation, trained group was higher than untrained group. In addition, there was significant difference(p〈.001) at 60% and 85% exercise levels and All-out time. 2.In respiratory rate, tranined group was higher than untrained group. In addition, there was significant difference(p〈.01)at 85% exercise level and All-out time. 3.In respiratory gas exchange, trained group was lower than untrained group. In addition, there was significant difference(p〈.01) at All-out time. 4.In oxygen intake per weight, trained group was higher than untrained group. In addition, there was significant difference(p〈.001) at 40%, 60%, and 85% excercise levels and All-out time. 5.In heart rate, trained group was lower than untrained group. In addition, there was remarkable difference(p〈.0901) at rest.

중량 운반시 잡기 변화에 따른 지면 반력 분석

서국웅,이중숙,정미라,이훈식,윤양진,박승범 釜山大學校 附設 體育科學硏究所 1999 體育科學硏究所 論文集 Vol.15 No.-

The purpose of this study was to examine ground reaction force pattern changes of the body according to various weight loads and the holding during lifting and carrying object. The experiments were conducted with utilizing GRF analyses for five male and five female adults as subjects. The results were as followed. 1) In carrying 5kg objects, there was no significant difference between female and male subjects. The equal anti-force against the ground was shown in between their left and right feet because of the lightness of the objects. But in 10kg objects, the significant differences were shown in both side feet between female and male subjects. Male subjects showed more powerful anti-force, that is, more loads were imposed on male subjects. 2) In carrying 15kg objects, no significant difference was shown in right feet between male and female subjects, but in left feet, was shown. In 15kg objects male subjects had more road than female subjects like in 10kg objects. In carrying 20kg objects, also no significant difference was shown in right feet between male and female subjects, but in left feet, was shown. This was caused by the flexibility of the center of their bodies. 3) In carrying 25kg objects, no significant difference was shown in left feet between male and female subjects, but, a significant difference was shown in the right feet. There was no consistency of the difference in left and right feet between male and female subjects in each weight. It is caused from different dynamic structure of body center movement between male and female and the result was different according a weight of load. 4) In carrying 25kg objects, female and male subjects didn't t keep COG, tended to fall down because of excessive load on their muscles and joints and then not have appropriate supports of their bodies. They showed much supportive anti-force and the possibility that can cause hurts of coxal articulation, knee joints, foot joints and other muscles.