• 제목/요약/키워드: Korean population.

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스마트카드 자료를 활용한 서울시 대중교통 서비스 형평성 분석 - 취약계층 유형별 이동성을 중심으로 - (An Analysis on the Equity of Public Transit Service using Smart Card Data in Seoul, Korea - Focused on the Mobility of the Disadvantaged Population Groups -)

  • 이호준;하재현;이수기
    • 지역연구
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    • 제33권3호
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    • pp.101-113
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    • 2017
  • 본 연구는 2014년 스마트카드 데이터를 활용하여 장거리 통행에서 대중교통 의존도가 높은 교통 취약계층의 대중교통 이동성을 평가하는 것에 목적이 있다. 특히, 신체적인 문제나 제도적으로 대중교통수단을 선택하게 되는 교통약자(노인, 청소년)와, 경제적 여건으로 대중교통을 이용하여 통근통행을 하는 저소득층 인구를 중심으로 대중교통 이동성을 평가하였다. 또한, 서울시의 노인, 청소년, 기초생활수급자의 분포와 각 취약계층의 대중교통 이동성 수준을 함께 고려하여 각 취약계층의 대중교통 이동성 취약지를 식별하고, 이를 종합하여 대중교통 이동성 개선 우선 지역을 선정하였다. 분석 결과, 대중교통 이동성이 낮으며, 교통취약계층 인구가 많이 거주하고 있는 15개의 대중교통 우선 개선지역을 도출하였다. 본 연구는 개인의 실제 통행 데이터인 스마트카드 데이터를 이용하여 대중교통의 이동성을 평가한 점과 교통 취약계층의 기본적인 이동성을 위해 대중교통 서비스가 개선되어야할 대중교통 이동성 취약지를 식별하였다는 점에서 의의를 가진다.

격자크기가 밀도구분적 인구추정의 정확성에 미치는 영향 (Effect of Grid Cell Size on the Accuracy of Dasymetric Population Estimation)

  • 전병운
    • 한국지리정보학회지
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    • 제19권3호
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    • pp.127-143
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    • 2016
  • 본 연구는 상이한 셀 크기에 따라 밀도구분적 인구추정의 정확성이 어떻게 변화하는지를 탐색하였다. 미국 조지아주 풀턴 카운티를 사례로 한 밀도구분적 인구 지도가 지능적인 밀도구분적 지도제작기법, 인구자료, 원본 및 모의된 토지이용 및 피복 자료를 이용하여 30m에서 420m의 해상도까지 매 30m 간격으로 생성되었다. 밀도구분적 인구 지도의 정확성은 RMSE 및 수정 RMSE 통계치를 이용하여 평가되었다. 프랙털 차원 값은 TPSA 방법을 사용하면서 30m에서 420m의 해상도까지 생성된 밀도구분적 인구 지도에 대해 각각 계산되었다. 연구결과에 따르면, 속성의 정확성 측면에서 인구를 보다 정확하게 추정하기 위해서 210m 이하의 격자 셀 크기가 적절하였나, 사례지역에서 밀도구분적 인구추정의 허용가능한 공간적 정확성을 충족시키기 위해 30m의 격자 셀 크기가 적절하였다. 또한, 프랙털 분석은 120m의 격자 셀 크기가 사례지역에서 밀도구분적 인구추정을 위한 최적의 해상도 이다는 것을 보여준다.

Euclidean Genetic Distances of Four Manila Clam (Ruditapes philippinarum) Populations analyzed by PCR Research

  • Yoon, Jong-Man
    • 한국발생생물학회지:발생과생식
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    • 제21권3호
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    • pp.269-274
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    • 2017
  • The PCR analysis was performed on DNA samples extracted from a total of 20 individuals using six oligonucleotides primers. The author accomplished clustering analyses to reveal the Euclidean genetic distances among four clam populations from Gochang, Seocheon, Taean and Anmyeon of the Korean peninsula. The oligonucleotides primer OPA-08 generated 5 unique loci to each population, approximately 550 bp and 600 bp, respectively, in the MCS population. Especially, the primer OPA-20 generated 15 unique loci to each population, which were identifying each population, approximately 400 bp, 750 bp and 800 bp, in the MCT population. Individuals from MCG clam population ($0.637{\pm}0.227$) exhibited higher band-sharing values than did individuals from MCG clam population ($0.402{\pm}0.115$) (P<0.05). The dendrogram obtained by the six oligonucleotides primers indicates four genetic clusters: cluster 1 (MCG 01, 02, 04 and 05), cluster 2 (MCS 06, 07, 08, 09 and 10), cluster 3 (MCT 11, 12, 13, 14 and 15) and cluster 4 (MCA 16, 17, 18, 19, 20 and MCG 03). Among the twenty clam individuals, the shortest genetic distance that displayed significant molecular differences was between individuals 14 and 15 from the MCT population (genetic distance = 0.094), while the longest genetic distance among the twenty individuals that displayed significant molecular differences was between individuals MCG no. 01 and MCG no. 02 (genetic distance = 0.687). Comparatively, individuals of MCS clam population were fairly closely related to that of MCT clam population, as shown in the hierarchical dendrogram of Euclidean genetic distances.

Excess zinc uptake in Paronychiurus kimi(Collembola) induces toxic effects at the individual and population levels

  • Son, Jino;Lee, Yun-Sik;Kim, Yongeun;Wee, June;Ko, Euna;Cho, Kijong
    • 환경생물
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    • 제37권3호
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    • pp.335-342
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    • 2019
  • The purpose of this study was to investigate the toxic effects of zinc in collembolan Paronychiurus kimi at the individual (survival and juvenile production) and population (population growth and age structure) levels after 28 days of exposure in artificially spiked soil. These toxic effects were interpreted in conjunction with the internal zinc concentrations in P. kimi. The EC50 value for juvenile production based on the total zinc concentration was 457 mg Zn kg-1 dry soil, while the LC50 value for adult survival and ri=0 value for population growth were within the same order of magnitude (2,623 and 1,637 mg Zn kg-1 dry soil, respectively). Significant differences in adult survival, juvenile production, and population growth compared with the control group were found at concentrations of 1,500, 375, and 375 mg Zn kg-1 dry or higher, respectively, whereas significant differences in the age structure, determined by the proportion of each age group in the population, were observed in all treatment groups. It appeared that the internal zinc level in P. kimi was regulated to some extent at soil zinc concentrations of ≤375 mg Zn kg-1 dry soil, but not at high soil zinc concentrations. These results indicate that, despite zinc being regulated by P. kimi, excess zinc exceeding the regulatory capacity of P. kimi can trigger changes in the responses at the individual and population levels. Given that population dynamics are affected not only by individual level but also by population level endpoints, it is concluded that the toxic effects of pollutants should be assessed at various levels.

한국의 사회 . 인구지리학의 발달과정과 전망 (Progress and prospect of social and population geography in Korea)

  • 최병두
    • 대한지리학회지
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    • 제31권2호
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    • pp.268-294
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    • 1996
  • 우리나라에서 사회.인구지리학은 다른 전공분야들에 비해 상대적으로 늦게 발달했 다고 할 수 있지만 최근 연구자들의 많은 관심을 끌면서 상당한 연구업적을 누적시키게 되 었으며, 앞으로 지리학의 학문적 발전을 선도할 뿐만 아니라 우리 사회가 당면한 사회공간 적 문제들의 해결에도 크게 기여할 것으로 전망된다. 이러한 점에서 본 연구는 우리나라에 서 1950년대 현대 지리학의 성립이후 사회.인구지리학 발달과정을 살펴보고 앞으로의 발전 전망과 과제를 모색해 보고자 한다. 이러한 연구목적에 따라 본 연구에서는 먼저 사회.인 구지리학의 일반적 개념 및 주요 주제들과 그 발달과정을 개관하고 다음으로 그동안의 연구 성과와 연구동향을 몇 가지 주요 주제, 즉 연구방법론, 도시화와 도시인구현상, 인구이동과 농촌사회생활의 변화, 거주지분화와 도시재개발, 도시사회생활과 지역사회복지 등으로 나누 어서 살펴 보고자 한다. 끝으로 사회.인구지리학의 발전전망과 과제를 간략히 논의하고 있 다.

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인구변화가 쓰레기배출량에 미치는 영향 -부산시를 사례로- (Effect of Population Change on Waste Emission: The Case of Busan City)

  • 성신제;이희열
    • 한국지역지리학회지
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    • 제11권6호
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    • pp.559-570
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    • 2005
  • 본 연구는 부산시를 사례로 하여 인구변화가 쓰레기배출량에 미치는 영향을 파악하는데 목적이 있다. 연구결과는 다음과 같이 요약된다. 첫째, 부산시는 1995년 이후 인구수와 쓰레기배출량이 전반적으로 감소하는 경향을 보였다. 구별로 인구수와 쓰레기배출량의 증가와 감소에 따라 5개 유형으로 구분되었으며, 1995년과 2003년의 구별 인구수와 쓰레기배출량의 상대적 평가를 위한 Z값을 분석한 결과, 1995년은 5개 유형으로, 2003년 6개 유형으로 구분되었다. 둘째, 쓰레기배출량과 인구수, 용도지역(주거지역, 상업지역, 공업지역)별 면적 및 광공업생산액 간의 상관관계를 각각 파악한 결과, 인구수, 주거지역 면적의 순으로 매우 강한 정적 상관관계가 있는 것으로 나타났다. 또한, 인구수와 주거지역 면적간에 공선성이 존재하여 인구수가 쓰레기배출량 해석을 위한 중요한 요인임은 물론 주거지역 면적의 특성까지 포함하여 설명할 수 있다. 셋째, 인구수가 쓰레기배출량에 미치는 영향 정도를 분석한 결과, 인구수는 쓰레기배출량을 92%이상 예측할 수 있는 것으로 나타났다.

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가정학교육 영역에서의 인구교육문제에 관한 조사연구 -선임가정학자들을 대상으로- (A Study of the Attitude of/and Problems Encountered by Senjor Home Economist Toward the Integration of Family Planning Education in the Korean Formal School System)

  • 김지화
    • 대한가정학회지
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    • 제19권3호
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    • pp.83-101
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    • 1981
  • Under the full consideration of the growing need and importance of population education in the field of home economics in Korea, the study was carried out to verify and assess the following facts on the current issues of population education of home economists who are presently engaging in teaching professions as the teachers of middle and high school and professors of college and universities by setting its primary objectives of the study as followings; 1) to assess the degree of general knowledge and attitudes of home economists toward population education in the field of home economics, 2) to verify the problems encountered in implementing population education by home economists in its field, 3) to find an existing status of previous trainings received and other activities of population education of home economists aimed at utilizing these findings as a part of reference materials when the population education is conducted in the field of home economics. In order to attain these objectives described above, the questionnaire was carefully designed to house a total of 40 questions with good combination of multiple-choice and the simple answer questions. The mail questionnaire survey was conducted by establishing teachers of home economics at middle/high schools and college/universities as Senior Home Economists(SHE) who are from public, private liberal arts and vocational schools. The rate of response observed during the survey was 45.6 percent and the findings of the survey research are as follows: 1) Examining the status of the respondents by residence and religion, it was found that 45 percent of middle & high school teachers ar.d 59. 1 percent of college professors are residing in Seoul city area and that the largest percent of them are christian in their religion. Analyzing respondents by their ages, 56 percent of middle/high school teachers are in their 30s, 45 percent of college professors are in their 40s, and 37 percent of college teachers are in their 30s. In addition, 13 percent of the total respondents are found to be unmarried. The study also revealed that 71 percent of the college professors finished Master Degree course and 82 percent of middle/high school teachers are graduated from college level lasting 4 years. Looking over the status cf major fields of respondents, 68.4 percent of middle/high school teachers are specialized in home economic education and the college professors, on the other hand, show relatively even prortion by specializing in the order of food & nutrition science, clothes & textile science and home managerial science. As far as the length of teaching experience is concerned, a relatively longer period of teaching experience is observed in the college professors in comparison with that of middle/high school teachers. In other words, 33.3 percent of middle/high school teachers are experienced in teaching from 6 to 10 years on average while 43.9 percent of college professors show more than 16 years of experience. 2) Examining the status of existing number of children cf the respondents, one boy and one daughter pattern is predominant, showing 28.5 percent in middle/high school teachers and 21.1 percent in college professors. As for the desired number of children of unmarried respondents, it is observed that 43.8 percent of middle/high school teachers desire to have one boy and one girl, and 31.3 percent of college professors want to have one child regardless of the sex. By assessing the degree of awareness of the population education through their students, it is observed that 53 percent of middle/high school teachers and 50 percent of college professors are aware of population education in some extent and that a majority of respondents took the positive attitudes toward an inclusion of family planning components into the formal school education. Another noteworthy to observe is that a total of 84.8 percent out of middle/high school teachers pointed that the population education currently conducted at schools as a part of home economics are less sufficient than it should be. 3) Analyzing the tendency as to whether the respondents were experienced in receiving population education during the time when they were students, 75 percent of college professors and 59 percent of middle/high school teachers responded negative answers in the survey. In the mean time, a total of 50 percent of the respondents replied that they began to acknowledge the importance of population education mainly through the participation of some sort of population-education orientend seminars, experienced by 40 percent of college professors and 80 percent of middle/high school teachers. 4) What it calls attention in this study was to find that 96.5 percent of middle/high school teachers and 72 percent of college professors conduct population education to some extent during their lecture hours and that more than 80 percent of them are never experienced in teaching population and family planning contents in their regular classes. It is, on the other hand, found that no more than once was the response of those who believe themselves that they are experienced in teaching these relevant components to their students. Analyzing the contents of the subjects being taught in the class, a large percent of them are found to be consisted of population and family planning contents. According to this study, the current population education through the formal school is quite inactive. Analyzing the facts, 44.9 percent of the college professors responded that the population and family planning components are quite apart from their specialization which eventually generates lack of interest in the field. 5) It is also noticed through the study that the degree of frequency of commenting on population and family planning contents during the classes was depending significantly on their specializations which means that the degree of frequency varies from a major to another. Those who majored in home managerial science was the first one, as compared to others who majored in different specializations. Glancing over the status of correlations between ages of the respondents and numbers of seminar paticipation, it is quite clear that the aged group participated more than the younger group did, and that the most highest number of participations made by college professors were those who are in 50s. In addition, it is also found that those who are aged 20s and 60s of the respondents were the group who comments least on the contents of population and family planning at their classes. The suggestions and recommendation made through this survey research are as follows. 1) No one denies that the rapid increase of population, as compared to the limited size of land and resources, will certainly affect adversly to an enhancement of individual life quality which will, eventually, bring forth the poverty of the nation. This is the reasson why we are insisting that the world population be controlled up to an optimum level with a matter of global concerns. It is our understading that the primary aim for reducing number of population is believed to be attained only by conducting the systematic and comprehensive population education through the formal schools. Therefore, the role of home economists in the field of population/family planning education is considered very importment due to the fact that an ultimate goal of population education is placed in elevating the quality of family life by having optimum number of children through family planning program. 2) It is quite clear that home economists as teachers of formal school in all level are invited to pay their attention on redefining the ultimate goal of education and that of population education. We also understant that the primary objective of population education is to change the norm and value of the clients by replenishing the students with pertinent knowledge and attitudes on population and its related problems through a sort of education in order to attain the ultimate goal for enhancing the quality of life. There is no exception in the theory of home economics. An altimate goal of home economics is to elevate the general quality of life through an establishment of value existed in daily life. Considering the relations between population education and home economics, it is quite indespensable to bandle population components as an integral part in the field of home economics. We believe, therefore, that the senior home economists positive participation in the effort population control is more needed than it has been. 3) It is also strongly urged that population education should be a part of instructor training course for home economics. In other words, the teacher of home economics should be well aware of population and its problems by teaching interrelationship between population education and home economics, needs, contents and methods of population education during the instructor training courese for home economics. In addition, the senior home economists should be encouraged through positive participation on the short term training by types of domestic and international seminar, workshop, etc. 4) We certainly believe that the population education can not sustain itself without any backing-up of information and findings' of various and comprehensive researches of natural and social sciences. Accordingly, every senior home economist is invited to exert their maximum effort to conduct systematic study with an aim to utilize these findings and information at best in population education in the field of home economics. Therefore, we consider that the development of training material is imminent in order to provide effective and efficient population education through the for training of home economies. It should be noted that these training materials must be carefully designed, tailored and developed to meet the different classes of trainees under the considerations as to whether it is easily adaptable and infusable into the curricula of every field of home economics, and it is acceptable in the degree of difficulty and quality in its contents. 5) It is true that there are many domestic and international research rapers, reports and findings in the field of population education and family planning. However, there is a tendency that the most of research papers are heavily relying on the authors intension and preferences in its expression and publication. Under these circumstances, it is urged that the home economists should aware of the growing need of the technical training in order to keep these available information and research findings reprocessed and redesigned to insure the practical application into the population education in the field of home economics in Korea.

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항해 및 동지나해에 있어서 기선저인망어업 대상 참조기의 자원량 해석 (Stock Assessment of Yellow Croacker for Korean Trawlers in The Yellow Sea and East China Sea)

  • 신상택
    • 수산해양기술연구
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    • 제8권1호
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    • pp.1-13
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    • 1972
  • Yellow croacker, Tseudociaena manchurica Jordan et Thompson in the Yellow Sea and East China Sea are subjected to be caught by trawl nets throughout the year. First indices of population size in every period 8re calculated. Considering present status of the yellow croacker fishery and ecology of the fish, mathematical models must have been established in order to determine catchability coefficient, natural m ortali ty, fishing mortality, recrui ting coefficient of the fish ing ground, and dispersion coefficienl from the fishing ground. The results an, summmarized as follows: Catchabil i ty coefficient $(C) = 2. 2628 {\times} 10^{-5}$ Natural mortality (M)=0.3293 Population for lhe first half season(July 1st to the following January 3lst) Initial population = 14, 621 $/\frac{M}{T}$ Recruitment =45, 597 $/\frac{M}{T}$ Natural mortality = 8, 660 $/\frac{M}{T}$ Final population =42, 970 $/\frac{M}{T}$ Population for the latter 1131f scason(February 1st to June 30th) Initial population = 69, 170 $/\frac{M}{T}$ Dispersion =51, 688 $/\frac{M}{T}$ Natural mortality = 6, 082 $/\frac{M}{T}$ Final population = 1, 802 $/\frac{M}{T}$.

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성인의 비만과 치주질환의 관련성 (Relationship between obesity and periodontal diseases in adults)

  • 김수경
    • 한국치위생학회지
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    • 제16권6호
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    • pp.815-824
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    • 2016
  • Objectives: The purpose of the study is to investigate the relationship between obesity and periodontal diseases in adults. Methods: The subjects were 6,762 adults over 19 years old selected from the 6th Korean National Health and Nutrition Examination Survey (2013). The study instruments included periodontal status of periodontal diseases, body mass index (BMI), and waist circumference (WC). Periodontal status was evaluated by community periodontal index (CPI). Data were analyzed using SPSS 18.0 program. Results: The prevalence of periodontal diseases was higher in male, older aged people, undereducated people, current smokers, and those having poor cognition for toothbrushing (p<0.001). The rate of obesity by BMI and WC was higher in male, older aged people and current smokers. The rate of obesity was lower in well-educated people and good practice of toothbrushing (p<0.001). The prevalence of periodontal diseases by BMI showed 0.565 times lower in underweight population, 1.302 times higher in overweight population, and 1.311 times higher in highly obese population than normal population. The prevalence of periodontal diseases by waist circumferences showed 1.404 times higher in obese population than the normal population (p<0.05). Conclusions: It is very important to promote periodontal disease prevention and education for obese population in Korea. The risk of periodontal diseases can be preventable by decrease of BMI and WC.

농어업인과 비농어업인의 손상, 중독 유병률 비교 연구 (The Comparative Study on the Prevalence of Injury/Poisoning in the Agricultural and Fishery Population and the General Population)

  • 임형준;권영준;임준;주영수;이경숙;김경란
    • 농촌의학ㆍ지역보건
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    • 제33권1호
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    • pp.82-89
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    • 2008
  • 농촌의 고령화, 기계화 및 농약 사용량의 증가는 농어업인의 손상 및 중독의 증가에 영향을 미치고 있다. 본 연구에서는 농어민 자격자료와 건강보험수진자료 등 2차 자료원을 이용하여 농어업인과 비농어업인에서 손상질환의 유병률을 비교하였다.구체적으로 농어업인과 비농어업인 사이의 전체손상질환 유병률의 차이를 비교하였고 농어업인에서 많은 5대 다빈도 손상질환과 농약에 의한 중독 상병에 대해 비교하였다. 유병률 비교는 남녀 각각에서 비농어업인을 표준 인구로 간접 표준화법을 이용하여 연령보정 표준화 이환비와 95% 신뢰구간을 구하였다.연구결과 농어업인의 전체손상질환 연령보정 표준화이환비는 남자에서 137.6(95% 신뢰구간 137.1 - 138.1) 이었으며 여자에서는 123.3(95% 신뢰구간 122.9 - 123.8)로 유의하게 높았다. 세부질환별로는 요추/골반, 어깨, 목의 염좌, 흉골, 갈비뼈, 흉추의 골절과 살충제 중독에서 연령보정 표준화이환비가 유의하게 높았다.향후 농어업인 손상질환과 관련된 다양한 형태의 연구가 필요하며, 농어업으로 인한 손상의 지역별 또는 경시적 비교가 가능하도록 전체 손상과 작업관련성 손상의 정의를 표준화하는 것이 필요하다.