• 한국경영과학회지
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• 제8권1호
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• pp.5-10
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• 1983

Foreign direct investment is considered to be one of the important technology transfer channels from advanced countries to less developed countries. The purpose of the study is to find the answers for the problems: if there is any difference of technology absorption level between the foreign affiliate companies, and what are the major factors which explain the difference. It is shown that the technology absorption level of foreign affiliate company is negatively related to the management control level by foreigners, to the rate of exportation, but positively related to the number of competing company and to the nature of generality of the technology.

• 한국음향학회지
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• 제7권4호
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• pp.22-30
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• 1988

이 논문에서는 무한 격리벽내의 가장자리가 고정된 원형평판으로부터의 음압복사를 FFT 기법을 이용하여 계산하였다. 음장은 컴퓨터 계산시간을 절약하기 위해 Rayleigh integral 을 직접 수치해석적으로 구하는 대신에 공간영역에서 2차원 FFT 방법을 이용하였다. 그 결과 1/200의 시간을 절약할 수 있었다. FET방법은 원형평판형상 뿐만아니라 어떤 형상에도 적용 가능하며 복잡한 형상의 근거리 및 원거리 음장을 예측하는데 상당히 유효하다.

• 한국통신학회논문지
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• 제35권7A호
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• pp.731-742
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• 2010

We propose an incremental relaying protocol in conjunction with opportunistic communication for differential modulation with an aim to make efficient use of the degrees of freedom of the channels by exploiting a imited feedback signal from the destination. In particular, whenever the direct link from the source to the destination is not favorable to decoding, the destination will request the help from the opportunistic relay (if any). The performance of the proposed system is derived in terms of average bit error probability and achievable spectral efficiency. The analytic results show that the system assisted by the opportunistic relaying can achieve full diversity at low SNR regime and exhibits a 30㏈ gain relative to direct transmission, assuming single-antenna terminals. We also determine the effect of power allocation on the bit error probability BEP) performance of our relaying scheme. We conclude with a discussion on the relationship between the given thresholds and channel resource savings. Monte-Carlo simulations are performed to verify the analysis.

• Journal of the Korean Data and Information Science Society
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• 제26권3호
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• pp.755-762
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• 2015

One of the main objectives of the U.S. Census Bureau is the proper estimation of median household income for small areas. These estimates have an important role in the formulation of various governmental decisions and policies. Since direct survey estimates are available annually for each state or county, it is desirable to exploit the longitudinal trend in income observations in the estimation procedure. In this study, we consider Fay-Herriot type small area models which include time-specific random effect to accommodate any unspecified time varying income pattern. Analysis is carried out in a hierarchical Bayesian framework using Markov chain Monte Carlo methodology. We have evaluated our estimates by comparing those with the corresponding census estimates of 1999 using some commonly used comparison measures. It turns out that among three types of time-specific random effects the small area model with a time series random walk component provides estimates which are superior to both direct estimates and the Census Bureau estimates.

• 아동학회지
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• 제14권2호
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• pp.149-168
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• 1993

The purpose of this study was to develop a theoretical model from which to test the influence of family background and work experience on the level of rural high school students' (N=381) occupational aspirations. In the basic model, mother's occupation directly influenced occupational aspirations. Father's education influenced occupational aspirations directly and also indirectly through students' academic achievement. The number of working hours per week had a direct and negative influence on academic achievement. In a different path, working hours had an indirect positive influence on academic achievement through parents' different treatment which especially focused on the fact that parents gave students more freedom compared to the relationship they shared before the students began to work. Enjoying school, studying homework, and extra reading were influenced by students' number of working hours. Two variables, extra reading and job characteristics, predict the social acceptance work attitudes which are a direct predictor of occupational aspirations. Academic achievement had a greater total effect on the level of occupational aspirations than any other variables.

• 한국조경학회지
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• 제33권3호
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• pp.105-113
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• 2005

Human desire is required to be changed variously as time flows. A theme park which is planned to male a good memory including a variety of story, drama, and experience with one of themes is increasingly and currently broaden to be a good economic value of cultural tourism for the local autonomy institution or individual business. The plan for a theme park should be developed to give the tourist satisfaction at studious and ecology educational needs in conformity with our country's distinctive four seasons, its surrounding environment, facilities, and its contents. This design which is called 'Bear theme park' has only one theme focused on a combined effort with a landscape designer and a sculptor. It is estimated that the park must be our country's unique model of a theme park The purpose of this study is to request the designer's direct construction to participate in it by themselves, to solve any problems on the design side, to experience the real construction procedure, and to take the designer's techniques, and skills as soon as the design completed.

• Journal of Chest Surgery
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• 제24권1호
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• pp.106-112
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• 1991

A 37-year old man was admitted due to the left subauricular mass of 6 month duration which was 3 x 4cm sized, pulsatile and slowly growing He was suffered from the intermittent left facial and auricular pain radiating to the occipital area. The carotid angiography revealed 3x4cm sized saccular aneurysm of the left internal carotid artery just above the carotid bifurcation, extending to the mandibular angle level. He was planned to be operated under the direct clamp of internal carotid artery or shunting procedure. But, the back pressure of the internal carotid was 35mmHg, which suggested adequate cerebral collateral. Thereby, aneurysmectomy and restoration of cerebral blood flow with saphenous vein graft was done under the direct clamp of internal carotid artery for 25 minutes. Although mild transient neurologic sequelae such as mydriasis, tongue deviation for 10 days, he recovered completely without any complication. The aneurysmal sac had no thrombus and pathologic finding was compatible with congenital origin.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.413-416
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• 2009

Since the solar radiation is main input for sizing any solar photovoltaic system and solar thermal power system, it will be necessary to understand and evaluate the insolation data. The Korea Institute of Energy Research(KIER) has begun collecting horizontal global insolation data since May, 1982 and direct normal insolation data since December 1992 at 16 different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by solar energy system users as well as by research institutes. Among some significant results, the yearly averaged horizontal global insolation was turned out 3.61 kWh/$m^2$/day and the yearly mean 5.38 kWh/$m^2$/day of the direct normal insolation was evaluated for clear days.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.1043-1047
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• 2003

Most of the measurement and the evaluation of hand-transmitted vibration have been performed by using a small size single axis accelerometer between the handle and the hand palm or a three axis accelerometer attached on an adapter outside the hand(indirect measurement). It is most desirable for the correct evaluation of hand-transmitted vibration form the power tool handle to measure the acceleration between the handle surface and the hand palm in the three axis(direct measurement) as recommended in ISO 5349-1. In the study three axes acceleration measurement device was developed of which the thickness was less than 7mm so that it can be placed between the handle and the palm without any inconvenience during the measurement. To verify the performance of the developed device, measured acceleration by the two methods, direct and indirect, were compared in the study.

• 한국의류산업학회지
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• 제9권5호
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• pp.553-562
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• 2007

This study intends to examine the influencing factors in conformity and individuality of make up. For the study, a questionnaire survey was conducted of 436 women in between their twenties to fifties residing in the Kyeongnam region. Obtained data were analyzed pearson's correlation coefficient and multiple regression analysis. The result is summarized as follows.; The influence on conformity and individuality of make up can be described into 4 factors that are included in the decision making process of conformity and individuality, in other words, the demographical characteristic, the body cathexis, the need and the clothing value. The demographic characteristics, the marriage status and the education had a direct influence on conformity, however the body cathexis did not have a direct influence on any subordinate factors of conformity and individuality, but had indirect influence having the need as a parameter or had no influence having the clothing value as a parameter.