• Management & Information Systems Review
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• v.32 no.4
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• pp.1-25
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• 2013

The purpose of this study was to test the structural relationships among the related variables of university students' satisfaction. This study utilized nation-wide survey data previously collected from 1400 students distributed across 32 universities in Korea. NCSI model was used as a theoretical framework. Using the AMOS 17.0, the structural relationships among six variables were tested, including students' expectancy level, perceived quality, perceived value, satisfaction, complaint rate, and loyalty. The major findings of the study are as follows: First, students' expectancy level had a positive effect on perceived quality; but had no significant effect either on perceived value or on satisfaction. Second, perceived quality had positive effects on perceived value and satisfaction; and perceived value also had a positive effect on satisfaction. Third, students' satisfaction had a negative effect on complaint rate; but had a positive effect on loyalty. Fourth, students' complaint rate had a negative effect on loyalty. The study results imply that among the related variables of students' satisfaction, perceived quality and value of the products work as critical variables, and complaint rate and loyalty directly relate to students' satisfaction. The study suggested that in order to enhance students' satisfaction, universities employ the total quality system and the students' complaints resolution system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.520-534
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• 2018

This study was conducted to understand the conceptual definition and characteristics of health inequality. To accomplish this, we analyzed data collected from 14 participants as well as from available literature regarding health inequality using the hybrid model introduced by Schwartz-Barcott and Kim. We categorized health inequality into nine attributes in three dimensions. These dimensions included "target", "precede", and "result," corresponding to the target, cause and consequence of health inequality, respectively. Specifically, we define health inequality as individuals, families, communities, socio-economic, or geographically distinct demographic groups that are treated unfairly and result in several problems such as loss of quality of life, reduction of survival rate, or aggravation of a disease due to (i) poor treatment by a hospital (ii) irregular meals, (iii) desperate need for work (for money), (iv) expensive medical care costs, (v) qualitative differences in medical care by regional groups (vi) the lack of knowledge regarding disease (vii) and inadequate health care because of lack of time. As a result of this unfair treatment, human rights violation occurs. The major contribution from this paper is that we provide a guideline for establishing strategies to reduce health inequality by identifying the concept of health inequality. Based on this study, we recommend development of an educational program to reduce health inequalities.

• 대한예방의학회:학술대회논문집
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• 2005.10a
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• pp.414-414
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• 2005

• Proceedings of the KIPE Conference
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• 1999.07a
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• pp.476-479
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• 1999

일반적으로 3상 PWM AC/DC 컨버터는 정상상태 에러 제거 및 빠른 과도응답 특성을 얻기 위해 동기 좌표계상으로 모델링하여 제어한다. 그러나 이와 같은 제어기는 입력전압이 평형일 경우를 전제조건으로 하므로, 입력전원이 불평형인 경우 입력전류와 출력전압에 고조파 성분이 나타나게 된다. 본 논문에서는 전원전압을 동기좌표계상의 정/역상 분으로 분석한 후 두 축(D, Q)의 역기전력 보상성분을 전원전압의 상태에 따라 적절하게 가변하고, 무효 전력과 고조파 전력 성분을 선택적으로 제거함으로써 입출력 시스템의 역률 및 고조파 성분을 효과적으로 보상하기 위한 간단하면서도 효과적인 제어기법을 제안하고, 시뮬레이션과 실험을 통하여 검증하였다.

• 사회경제평론
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• no.38
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• pp.9-49
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• 2012

Our luck is brute if we cannot choose or control it and, thus, we are not responsible for it. Our luck is optional if we can choose or control it and, thus, we are responsible for it. Egalitarian justice at least demands brute luck be fully neutralized. If, however, brute luck is not fully neutralized and possibly accumulated, what will happen to the Gini coefficients as a measure of inequality due to brute luck? By simulating brute luck under various combinations of the rate of accumulation and the level of, what I call, leximin-redistribution, I obtain the Gini coefficients for the distribution of the accumulated and, then, redistributed brute luck. The level of the leximin-redistribution determines the negative or positive relation between the rate of accumulation and the Gini coefficient. The minimum leximin-redistribution level that generates the negative relation between the rate of accumulation and the Gini coefficient, depends on the characteristics of the starting-point distribution of brute luck. The sooner the leximin-redistribution is ushered in, the lower the minimum level becomes. The so-called 'Growth First Redistribution Later' policy may hurt victims of brute bad luck.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.109-109
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• 2021

우리나라의 수자원 정책은 1960~80년대까지 성장 중심으로 추진되어 왔으나 환경오염, 소득 양극화 등의 여러 한계(the Limit to Growth)에 부딪히면서 성장과 함께 환경과 복지를 고려한 정책이 대두되기 시작하였다. 물분야는 수량과 수질 인프라에 지속적 투자를 통해 상수도 보급률은 97%, 하수도 보급률은 94%까지 향상되었으나, 물 서비스에 대한 계층·지역·세대 간 격차와 불평 등은 여전히 존재하고 있다. 따라서 증거기반에 입각한 전국민의 보편적 물복지 정책 실현을 위해서는 정량적 평가에 의한 물복지 수준 진단이 필요하다. 본 연구는 우리나라의 물복지 수준진단을 위한 지표와 지수체계의 개발 및 분석을 통하여 지자체의 물복지 상황을 진단하고, 이에 따른 물복지 정책을 진단하고자 한다.

• Journal of Digital Convergence
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• v.11 no.10
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• pp.459-467
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• 2013

The purpose of this study was to identify the differences in medical care utilization by regional economic status using the National Hospital Discharge Patients Injury Survey. In order to determine economic status of each region, 234 cities and counties were categorized 5 quintiles according to their financial self-reliance ratio. The main results are as follows. First, low economic region has high age-standardized admission rate and standardized mortality rate. Second, of 16 major diseases, cerebrovascular and heart diseases, lung cancer, and stomach cancer reported greater changes in standardized mortality rate by regional economic status. Third, the rate of admission via emergency room in low economic region is higher than that of high economic region. Lastly, in the major illnesses, lower economic status led to an increase in average length of stay. Therefore, In order to bridge the gap in health inequality across regions, a regional medical policy tailored for each region and characteristics of the economic status should be established.

• The Korean Journal of Applied Statistics
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• v.30 no.3
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• pp.475-486
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• 2017

This paper estimates the health life expectancies for Korean people based on a sample cohort database collected through objective measurements by the National Health Insurance Service. Health life expectancy is estimated using the single-state approach of Sullivan (1971). The 9-order correction factor method of Greville (1945) and Brass-logit model of Brass (1971) are also adopted for unobserved or incompletely observed age-specific morbidity and mortality. Based on the mortality and morbidity estimated from sample cohort DB, men and women in Korea are expected to live a 'healthy life' for 61 and 60 years in 2013, respectively, whereas life expectancies of men and women are 80 and 87, respectively. We also estimate certain disease-free life expectancies for each of genders, income levels, and types of insurance from 2003 to 2013 in Korea. We found that there exists an inequality of healthy life expectancy in Korea for different genders, income levels, and types of insurance.

• The Transactions of the Korean Institute of Power Electronics
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• v.14 no.2
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• pp.142-149
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• 2009

This paper investigates operating characteristics of three-phase matrix converter with unity input power factor by direct duty-ratio pulse-width modulation in the case of balanced and unbalanced load. It can be found from the system analysis that (1) The control algorithm for unity power factor is not related to the variables of load sides but the input voltages, (2) With the balanced three-phase load except for the pure reactive load, the unity input power factor can be achieved, (3) In the case of the unbalanced linear load, the equivalent input characteristics of the matrix converter can be seen like the nonlinear resister, (4) When the input frequency and the output frequency have the specific relationship, each input phases have the same sharing of the average power. The feasibility and validity of the analysis were verified by simulation and experimental results.

• The Transactions of the Korean Institute of Power Electronics
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• v.6 no.1
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• pp.34-42
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• 2001

A battery is the device that transforms the chemical energy into the direct-current electrical energy directly without a mechanical process. Unit cells are connected in series to obtain the required voltage, while being connected in parallel to organize capacity for load current and to decrease the internal resistance for corresponding the sudden shift of the load current. Because the voltage droop down in one set of battery is faster than in tow one, it amy result in the low efficiency of power converter with the voltage drop and cause the system shutdown. However, when the system being driven in parallel, a circular-current can be generated. The changing current differs in each set of battery because the system including batteries, rectifiers and loads is connected in parallel and it makes the charge voltage constant. It is shown that, as a result the new batteries are heated by over-charge and over-discharge, and the over charge current increases rust of the positive grid and consequently shortens the lifetime of the new batteries. The difference between the new batteries and old ones is the amount of internal resistance. In this paper, we can detect the unbalance current using the micro-processor and achieve the balance current by adjusting resistance of each set. The internal resistance of each set becomes constant and the current of charge and discharge comes to be balanced by inserting the external resistance into the system and calculating the change of internal resistance.