• Title/Summary/Keyword: Economic Scale

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Gravity Survey of the Tertiary Basin in the Southern Part of Korean Peninsula (한반도 동남부에 분포하는 제3기 퇴적분지에 대한 중력탐사)

  • Min, Kyung Duck;Bang, Sung Soo;Hyun, Yong Ho
    • Economic and Environmental Geology
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    • v.25 no.2
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    • pp.167-177
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    • 1992
  • The gravity measurement has been conducted at 53 and 34 stations with an interval of 1~1.5 km along the national roads of about 47 km and 34 km running from Duksungri to Yangpori and from Angangri to Byungpori, Kyungsangbookdo, respectively. The subsurface geology and geologic structure of Tertiary Pohang and Janggi basins along two survey lines are interpreted quantitatively by applying Fourier series and Talwani methods for Bouguer gravity anomaly. The depths of Conrad discontinuity vary from 11.8 to 12.5 km and 11.5 to 13.2 km along the survey lines between Duksungri and Yangpori, and Angangri and Byungpori, respectively. The depths of pre-Cambrian Gneiss complex underneath Kyungsang Supergroup vary from 3.8 to 4.2 km and 3.8 to 4.6 km along the survey lines between Duksungri and Yangpori, and Angangri and Byungpori, respectively. Massive granite bodies which are not exposed along the survey line between Duksungri and Yangpori are distributed on a large scale at the subsurface between Duksungri and Ochun, and Daegokri and Yangpori. Along the survey line between Angangri and Byungpori, it is exposed at Angangri, and extends underneath Chungrimdong, Pohang city. Andesite is distributed on a small scale underneath Pohang city and Ochun. The thicknesses of Tertiary Yonil and Janggi Groups are 0.2~0.9 km and 0.1~0.5 km, respectively. The Tuffaceous rocks which are the lowest formation of Tertiary sedimentary rocks are distributed with the thickness of 0.2 km at the surface and between Kyungsang Supergroup and Yonil or Janggi Groups. The Yonil and Janggi Groups are in fault contact by a fault running through Ochun and Chungrimdong, Pohang city. Two other faults are newly found near Heunghae-eup and Hyungsan river.

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A Field Study on the Application of Pilot-scale Vertical Flow Reactor System into the Removal of Fe, As and Mn in Mine Drainage (현장 파일럿 실험을 통한 광산배수 내 Fe, As, Mn 자연정화처리 효율평가)

  • Kwon, Oh-Hun;Park, Hyun-Sung;Lee, JinSoo;Ji, Won Hyun
    • Economic and Environmental Geology
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    • v.53 no.6
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    • pp.695-701
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    • 2020
  • This study aimed to monitor a pilot-scale vertical flow reactor (VFR) system being operated in long-term for water quality control of pH-neutral mine drainage containing Fe, Mn and As, discharged in D mine site. The treatment systems of VFR and zero manganese reactor (ZMR) consisted of sand/limestone, and steel slag/limestone, respectively. The systems were operated during about six months in order to evaluate their long-term treatment efficiency It was observed that both pH and alkalinity of mine drainage were remarkably increased and more than 98% of Fe, As and Mn ions was continuously removed during the tested period of time. In conclusion, the field results of this work demonstrated that the vertical flow reactor system can effectively treat mine drainage contaminated by Fe, As and Mn.

Feasibility Study on Small-scale A/R CDM Pilot Project in Mongolia (몽골 소규모 A/R CDM 시범사업 타당성 평가연구)

  • Cha, Junhee;Park, DongKyun;Lee, Jong-Hak;YOUN, Yeo-Chang;Choi, Jun-Seok
    • Journal of Korean Society of Forest Science
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    • v.100 no.4
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    • pp.698-707
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    • 2011
  • Over the past 10 years, South Korea has implemented various plantation projects including the Pine Restoration Project in Tujiin Nars and the desertification prevention forestation in Lun soum. This study has evaluated the implementation feasibility on the small-scale A/R CDM projects in Mongolia through which carbon emission credits can be secured. Characteristics, pros and cons, economic feasibility, and project execution feasibility were compared among three possible sites, Khyalganat, Tujiin Nars, and Lun soum. Among the three evaluated sites, Tujiin Nars has the better condition in tree growth, economic feasibility, and the applicability of experience than the other two sites. A/R CDM project in Mongolia, which has a great environmental benefit of combating desertification, is expected to have some effectiveness such as lowering costs from credit benefit, sustainable management by villagers, contribution to communities, investor's contribution to society and achievement of green image, and strengthening forestry cooperation between Korea and Mongolia.

Efficiency and its Determinants of Malaysian Banks: by DEA Model and SEA Model (DEA와 SEA를 이용한 말레이시아 은행산업의 효율성에 관한 연구)

  • Park, Seok-Gang
    • International Area Studies Review
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    • v.16 no.1
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    • pp.101-122
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    • 2012
  • This present paper examines stochastic cost functions of Malaysian commercial bank from 1991 to 1997 periods catches the changes un their management structure and technical efficiency. Then we also discuss policy implications for bank integration and competition policy which is the part of current financial reform that reinforces the banking sector. The present paper contributes to the expansion of their study in two respects. Firstly, we have estimated the cost function, availing ourselves of SEA based on a parametric approach. Secondly, our model also includes as a factor the existence of bad debts. According to our results, we observed economies of scale clearly, but economies of scope and technological progress were not observed. Regarding the policy implications, the result of our analysis suggests strongly that the current policy is appropriate.

Determinants of Sense of Control in Later Life (노년기 자기 통제감에 영향을 주는 요인)

  • Jang, Yuri;Lee, Jeongnam;Yoon, Hyunsook;Kim, Soo-Young
    • 한국노년학
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    • v.28 no.4
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    • pp.1055-1068
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    • 2008
  • Given the central role of sense of control in physical and emotional well-being, the present study examined the determinants of sense of control among Korean elders. We considered sociodemographic characteristics (age, gender, marital status, education, and self-perceived economic status), health-related factors (chronic conditions, functional disability, and sensory impairment), stressful life events, and network-related resources (network of relatives, network of friends, and filial satisfaction) as potential predictors. Sense of control was measured with Pearlin and Schooler's (1978) Mastery Scale. Hierarchical regression analyses with 291 Korean elders aged 60 or older (M age = 69.9) identified lower self-perceived economic status, more chronic conditions, greater functional disability, greater vision impairment, more stressful life events, and lower filial satisfaction as significant risk factors for a diminished sense of control. Because most of the identified risks represent normative experiences during later life, the results underscored the importance of preserving or promoting sense of control for older adults. Implications of the findings and recommendations for future studies are discussed.

The Evaluation Research of Weihai Fishery Production Efficiency Based on DEA Model (基于DEA模型的威海渔业生产效率评价研究)

  • Wu, Yinuo
    • Journal of East Asia Management
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    • v.3 no.1
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    • pp.11-23
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    • 2022
  • Under the circumstances of China's slower economic growth, the first document ofthe central committee of the CPC continue to focus on "three agricultures" problems, agriculture play a basic role on China's economic. Since 2007, the first document directly stresses the important role of agricultural and fisheries every year. Central Government Working Report of 2015 also stresses that under the new normal of economy, it is important to improve quality and efficiency of agriculture. Agricultural focus going forward will be on improving capacity of competitiveness, innovation and sustainable development.The fishery as an important part of agriculture plays a vital role in the protection of national food security, the prosperity of the rural economy and the optimization of national food structure. However, the situation faced on accelerating the speed of Chinese fisheries is still grim. As an important fishery breeding city in my country, Weihai has achieved remarkable results in the development of fisheries. Based on the input-output indicators of Weihai City from 2010 to 2020, this article uses the DEA model method to conduct a comprehensive analysis of the factors affecting the fishery production efficiency in Weihai City. This paper calculates the two stages of comprehensive efficiency, pure technical efficiency and scale efficiency, and comprehensive compares the two stages. The research results show that: From 2010 to 2020, the average comprehensive technical efficiency of Weihai fishery was 0.928, the average scale efficiency was 0.963, and the average pure technical efficiency was 0.963. The comprehensive technical efficiency of Weihai fishery production showed an upward and downward trend, the pure technical efficiency showed a downward and then upward trend, and the pure technical efficiency showed a fluctuating trend.

A Study on the Aging Anxiety and Self-Efficacy of the Elderly (노인의 노화불안과 자기효능감에 관한 연구)

  • Park, Gyeong-A;Kim, Jeong-Ja;Oh, Myung-Hwa
    • Journal of Korea Entertainment Industry Association
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    • v.14 no.6
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    • pp.251-258
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    • 2020
  • This study was conducted to find out the difference between aging anxiety and self-efficacy according to the general characteristics of the elderly in the community and to find out the correlation between aging anxiety and self-efficacy. From April 2019 to August 2019, 284 responses were used in the final analysis, focusing on senior citizens' health centers, welfare centers for senior citizens, health centers, and senior citizen centers in Gwangju and South Jeolla Province, and the survey was conducted using an aging anxiety scale and a self-efficacy scale. Studies have shown that aging anxiety has shown statistically significant differences in age, economic level, health condition, and present concern, and self-efficacy has shown statistically significant differences in age, academic background, religion, economic level and health status. The higher the age anxiety, the lower the self-efficacy. It is thought that it can be used to establish specific strategic measures for successful aging that can keep healthy for a long time and maintain a safe life.

Groundwater and Soil Pollution Caused by Forest Fires, and Its Effects on the Distribution and Transport of Radionuclides in Subsurface Environments: Review (산불에 의한 지하수 토양 환경오염과 방사성 물질 분포 및 거동 영향 고찰)

  • Hyojin Bae;Sungwook Choung;Jungsun Oh;Jina Jeong
    • Economic and Environmental Geology
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    • v.56 no.5
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    • pp.501-514
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    • 2023
  • Forest fires can generate numerous pollutants through the combustion of vegetation and cause serious environmental problems. The global warming and climate change will increase the frequency and scale of forest fires across the world. In Korea, many nuclear power plants (NPPs) are located in the East Coast where large-scale forest fires frequently occur. Therefore, understanding the sorption and transport characteristics of radionuclides in the forest fire areas is required against the severe accidents in NPPs. This article reviewed the physiochemical changes and contamination of groundwater and soil environments after forest fires, and discussed sorption and transport of radionuclides in the subsurface environment of burned forest area. We considered the geochemical factors of subsurface environment changed by forest fire. Moreover, we highlighted the need for studies on changes and contamination of subsurface environments caused by forest fires to understand more specific mechanisms.

A Study on the Relationship between Women's Values and Preference in Clothing Design (한국여성의 가치관과 의복디자인 선호도와의 상관성 연구)

  • Lee Sun Jae
    • Journal of the Korean Society of Clothing and Textiles
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    • v.11 no.1
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    • pp.29-42
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    • 1987
  • This study was an attempt to survey, the relationships between women's values and preference in clothing design. For the measurement of values scale was to relect the theoretical, economic aesthetic, social. political and religious values explained by Allport-vernon- Lindzey. The preference rate in clothing design consisted of 50 items and 3 factors including color, form and texture. The questionnaire were administered to a sample of women (between college students and adult) who lined in Seoul, Korea. The date for 910 respondents were analyzed by person's carrelation coefficient, to-test and $x^2$ test. Through this study, the followings were founds; 1. Aesthetic value was the mast important of female college students values and economic value was the most important of adult's values. 2. There were significant relation between values and the preference for clothing form in line and style; 1) In line preference, adult women indicated negative correlation with religious values but positive correlation with aesthetic and political values. 2) In style preference, adult women indicated negative correlation with economic values positive correlation with social values, for female college students indicated positive correlation with aesthetic social and political values. 3. There were significant relation between values and preference for texture in touch, thickness, weight, light and luster; 1) In relationship between texture and values, adult women indicated touchness preference negative correlation with theoretical and religious values, for female college students indicated positive correlation with aesthetic and social values. 2) In thickness preference adult women indicated negative correlation with theoretical values but female college students indicated positive correlation with political values. 3) In weight preference, adult women indicated negative correlation with theoretical values. But female college students indicated positive correlation with religious values. 4) In brightness preference, only adult women indicated positive correlation with social values, negative correlation with economic values. In transparency preference, adult women indicated positive correlation with aesthetic values, negative correlation with religious values. 4. There were significant correlation among color and economic, aesthetic; political and religious values, that is, evacuation and economic political values in adult women there were positive correlation with religious values in female students. 1) In chroma only adult women indicated negative correlation with religious values. In warm and cold, positive correlation with economic values in both of them. 2) In coloration, adult women like a complement color indicated negative correlation with aesthetic values, but positive correlation with political values. 5. There were significant differences in the preference of clothing design between female college students and adult women; correlationship with color variables. Evacuation, both of them indicated negative correlation with chroma positive correlation with warm and cold and coloration. In chroma, adult women indicated negative correlation with coloration and warm and cold, for female students indicated negative correlation with coloration. 6. Comparison with clothing preference: 1) In color preference, adult women liked the most white, brown, blue and black in sequence. Female college students liked the most white, also the next is blue and pink. 2) Clothing design preference, there was significant difference in warm and cold and coloration, adult women more liked than female students. In shape of clothing, both of them indicated significant difference in line and style, female students more liked sporty style. In texture, adult women more liked soft thin light weight and bright. 3) In silhouette preference, the most is H-line, female college students more liked.

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The Study on the Quality of Life for the Mothers of Hospitalized Chronic Pediatric Patients (만성질환아 어머니의 삶의 질에 관한 연구)

  • Choi Myung Ae;Lee Hyun Sook;Kim Dae Hee;Park Myung Hee;Yoon So Young;Cho Yeon Hee;Bang Kyung Sook;Park Yeon Hwan
    • Child Health Nursing Research
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    • v.6 no.2
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    • pp.249-261
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    • 2000
  • The purpose of this study were to identify the quality of life for the mothers of hospitalized chronic pediatric patients, and to explore the factors affecting the QOL of those mothers. The subjects were 201 mothers whose children had hospitalized at one University hospital with chronic diseases. Data were collected from the December, 1997 to December, 1998. We used a revised QOL instrument consisting of 34 items, 5 point likert scale based on the Noh's QOL instrument. The revised QOL consists of six subscales, those are physical status and function, self esteem, emotional status, economic status, relationship with family members, and relationship with neighborhood. Data were analyzed by t-test, ANOVA, Pearson's correlation using SPSS-PC. The results were as follows: 1. The mean score of quality of life for the mothers of chronic pediatric patients was 100.31, and item mean was 2.95. In subscale analysis, item mean of economic status was the lowest, and that of relationship with family members was the highest. 2. Correlations between characteristics of chronic pediatric patients, their mothers and QOL of mothers were as follows; 1) Total QOL of mothers had a significant positive relationship with progressing time relapse after diagnosing and age of mothers. There was a significant negative relationship between the total QOL of mothers and number of hospitalization of their children. 2) QOL on self esteem and economic status had a significant relationship with age of pediatric patients, the time relapse after diagnosis, and age of mothers. Total number of family members and QOL on economic status showed a significant positive relationship. QOL on emotional status, economic status, and relationship with family members of mothers showed negative correlations with the number of hospitalization of their children. 3. Followings were the result of difference in QOL among different demographic cha- racteristics of the subjects. 1) QOL on economic status of mothers was significantly higher when fathers of pediatric patients had jobs. 2) Total QOL score, QOL on emotional status, and QOL on relationship with neighborhood were significantly higher when mothers of pediatric patients had spouses. 3) QOL on self esteem of mothers was significantly higher when mothers had religion. 4. Followings were the result of difference in QOL among different diagnosis of the children. 1) Total QOL score of mothers whose children had congenital heart disease was higher than that of mothers whose children had leukemia and cancer. 2) QOL on emotional status, economic status, and relationship with family members of mothers whose children had congenital heart disease were higher than those of mothers whose children had leukemia, cancer, and epilepsy.

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