• Ocean Science Journal
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• 제43권1호
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• pp.49-59
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• 2008

To examine the population development of the dinoflagellates, Ceratium furca and Ceratium fusus, daily field monitoring was conducted between April and July 2003 in the temperate coastal water of Sagami Bay, Japan. During the study period, the concentrations of C. furca were always lower than those of C. fusus. A sharp increase in the densities of both species was recorded on 5 May showing the maximum cell concentrations (C. furca = $14,800\;cells\;L^{-1}$, C. fusus = $49,600\;cells\;L^{-1}$). In the 7 days prior to the May bloom of the Ceratium species (29 April to 1 May), the highest density of the heterotrophic dinoflagellate Noctiluca scintillans was observed. Additionally, a second bloom of C. fusus occurred on 22 July. Here, two causes of the significant increases in the Ceratium populations during the two blooming periods (first time; 1 to 8 May, second time; 15 to 22 July) are presented. First, an increase in the nutrients of the surface layer regenerated by the breakdown of blooms by N.scintillans could be considered as a major cause of the population increase of the two Ceratium species. Second, a decrease in salinity (to 27 psu) was correlated with the later bloom of C. fusus. These results suggest that the population development of the two Ceratium species requires nutrients regenerated after the reduction of the diatom population by N. scintillans and, for C. fusus, continuous low salinity conditions, compared to other environmental factors during the rainy season.

• 대한공간정보학회지
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• 제17권4호
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• pp.53-60
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• 2009

2008년 9월 기반시설부담구역 지정과 관련한 조항이 국토계획법에 신설되면서 정부는 관련연구를 통해 격자분석에 기초한 인구증가율 기반의 기반시설부담구역 지정기준을 예시한 바 있다. 본 연구는 현재 신도시 조성 등으로 인구증가가 활발한 화성시 동탄동을 사례대상지로 하여 인구증가율에 기초한 격자분석에 의한 구역지정방안에 대해 실무적 차원의 적용방법을 모색해 보았다. 이를 위해 우선 격자 공간분석을 통하여 동 단위의 공간규모에서 법정 인구증가율 상회 격자 셀들을 선별하고 다시 이들에 대한 버퍼공간 중첩의 단계별 시나리오를 통해 인구밀집이 예상되는 구역을 연동 집단화하여 기반시설부담구역 검토경계를 설정하는 방법에 대해 실험해 보았다. 이와 같이 선별한 동탄동 관내 가상 지정구역을 동탄동 토지이용계획도와 중첩하여 검토한 결과 실제 인구집중 구역들이 적절히 연동 집단화된 것으로 판단되었다.

• Journal of Preventive Medicine and Public Health
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• 제27권2호
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• pp.175-185
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• 1994

In order to anticipate disease pattern and health problems of Koreans in the 1st part of 21st century (by the year 2020), transition of population characteristics, mortality and morbidity data during the last 30 years Koreans have experienced were reviewed. On the actual basis of epidemiologic transition process that has undergone during last 30 years since 1960 along with socioeconomic development and successful implementation of selective national health policies (family planning, medical insurance and etc.), following changes can be expected in the 21st century in Korea, under the assumption that the current rate of progress is maintained. The population of South Korea alone will be doubled the population of 1960 by the year 2013 : aged Population older than 65 years will be increased from 3.3% in 1960 to 11.4% in 2020 with increased average age of the population from 23.6 year in 1970 to 39.2 year in 2020; urban population from 28% in 1960 to 83% in 2005. GNP/capita has increased tremendously from U.S. $120 in 1970 to $6,749 in 1992, and the government estimated it would be 519,350 in 2010 and $29,460 in 2020. Growth and developmental indices of children, educational achievement and social status of women also showed a remarkable improvement and anticipated to make futher progress. Leading causes of mortality and morbidity have shown a striking change during the last 30 years, from infectious diseases to chronic degenerative diseases and man-made injuries. Occurrence of communicable diseases may become minimal although viral hepatitis, venereal diseases Including AIDS, and well adapted herpes virus infections will maintain their endemic level. Newly evolving infectious agents, however, should be carefully monitored because of rapidly changing environments and human behaviours. Tuberculosis may increase up to the epidemic level when AIDS prevails. Ischemic heart diseases may increase steadily with increasing occurrence of hypertension and diabetes mellitus whereas cerebrovascular diseases may be decreased slowly. Musculaskeletal diseases which contribute a lot to the disability of aged people may be a major health problems due to increased aged population. Mental diseases, particularly that caused by alcohol and drug abuse, and senile dementia may become a prominent health problem. On the other hand injuries caused by traffic and industrial accidents that have shown most striking increase till now may be decreased considerably by intensive intervention. The health policies in the 21st century will be oriented to the health promotion for good quality life rather than life-savings.

• 한국산학기술학회논문지
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• 제17권9호
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• pp.737-744
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• 2016

본 연구는 지역간 인구이동보다는 내부 인구이동이 증가하고 있는 수도권을 대상으로 전출입 인구현황을 파악하고, 도시유형을 분석한 후 유형별 인구이동 영향요인을 분석하였다. 수도권 시 군 구별 전출입 인구를 분석한 결과, 서울시는 송파구, 인천시는 서구, 남동구, 경기도는 용인시, 화성시 등으로 인구가 집중하였다. 수도권 시 군 구간 전출입 현황에서는 수원시에서 화성시, 성남시에서 용인시로 이동하는 인구가 많았다. 고용밀도와 인구밀도를 변수로 한 도시유형분석에서는 4개의 도시유형(도심형, 자족형, 주거형, 도농형)으로 분류되었다. 도심형인 유형1은 전세가격, 도로연장, 지하철역 수, 자족형인 유형2는 총소득 증가율, 주택보급률, 도로연장, 주거형인 유형3은 주택보급률, 도시공원면적, 전세가격, 인구밀도, 도농형인 유형4는 사업체밀도, 주택보급률, 주택공급, 지하철역 수, 교육시설 등이 인구이동에 영향을 주는 것으로 분석되었다. 이중 주택보급률은 전입인구에 긍정적인 영향을 미쳤으나 인구밀도의 경우 전출인구에 영향을 주었다. 도로, 지하철역 수의 경우 도심형은 전출인구에 영향을 주었으나, 자족형과 도농형에서는 전입인구에 영향을 미치는 것으로 나타나 유형별로 각기 다른 영향을 보였다.

• 한국발생생물학회지:발생과생식
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• 제22권2호
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• pp.193-198
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• 2018

The author undertook PCR-founded genetic platform to investigate the hierarchical dendrogram of Euclidean genetic distances of one razor clam population, particularly for Solen corneus, which was further associated with those of the other clam population, by engaging with the precisely designed oligonucleotide primer sets. Seven oligonucleotides primers were used producing a total of 639 counted bands in population A and 595 in population B, respectively, ranging in size of DNA fragments from larger than approximately 50 bp to less than 1,100 bp. Their primers generated 39 specific fragments (6.10%) in population A and 47 (7.90%) in population B, respectively Comparatively, individuals of one razor clam population were fairly related to that of the other clam population, as shown in the hierarchical dendrogram of Euclidean genetic distances. The analysis of genetic variation between razor clam populations could offer important statistics for fisheries and mariculture. Generally the results showed specific and/or conserved genetic loci between razor clam populations. Specific markers established by the author will be valuable for the genetic analysis, species protection and increase of razor clam individuals in coastal region of the Korean Peninsula.

• International Journal of Industrial Entomology and Biomaterials
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• 제11권2호
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• pp.129-133
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• 2005

The seasonal occurrence and influence of abiotic factors viz., maximum and minimum temperature, maximum and minimum humidity and rainfall on population fluctuation of aleyrodid, Dialeuropora decempuncta on a evolved mulberry (Morus alba L.) variety known to be susceptible to aleyrodid infestation was assessed during the period from 1999 - 2001 in twenty-five villages under nine blocks of Malda district of West Bengal. The results indicate that the aleyrodid population is practically very low or absent during January to June and thereafter increases gradually. The increase in population of various stages of aleyrodid is significantly correlated with increase in previous 7 days of average maximum relative humidity.

• 무역학회지
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• 제44권3호
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• pp.15-24
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• 2019

The study conducted an empirical analysis of the impact of FDI on economic growth in four Asian countries: China, India, Vietnam and Korea. With panel data for the 1990-2017 period, the research model was developed for foreign direct investment (FDI), export amount (EX), government expenditure (G), exchange rate (EXR), and labourable population (L). The panel analysis results show that the increase in FDI, exports, government expenditure, labourable population significantly increased economic growth. The comparison analysis for each country revealed that FDI, exports and government expenditure significantly affect economic growth in China, that exports and government expenditure significantly affect economic growth in Korea, that FDI significantly affected economic growth in Vietnam, and that the increase in the workforce contributed to economic development in India. This paper characterized the different factors of economic growth in the four Asian countries. These results suggest that setting economic priorities to suit the specific economic conditions of each country is a shortcut to more efficient economic growth.

• 대한공간정보학회지
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• 제18권4호
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• pp.51-60
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• 2010

지난 2008년도에 기존의 기반시설부담금제가 국토계획법 상 기반시설부담구역제도로 개정되면서 2009년도 이후 전국적으로 다수 지자체들이 본 제도를 도입, 시행하고 있으며 이러한 새 제도를 통해 난개발 방지를 위한 선계획의 마련과 기반시설 설치비용 확보를 위한 유용한 제도적 기반을 가지게 되었다. 이러한 맥락에서 본 연구는 기반 시설설치계획과 기반시설부담비용 산정과정에 앞서 필요한 기반시설부담구역 지정에 대해 시행령에서 명시한 인구증가율 기준을 근거로 인구격자의 수직수평방향 사출형 셀 집단화 방법을 통해 구역지정 대안을 검토해 보고 이를 실제 기반시설부담구역 지정이 필요한 것으로 판단되는 화성시 수영리 개발제한구역 일원 대상지에 적용해 봄으로써 상기 방법론의 기술적 적용가능성을 확인함과 동시에 실무적 차원의 구역결정 제언을 시도해 보았다는 데 연구의 의의가 있다.

• 농촌계획
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• 제9권2호
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• pp.49-55
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• 2003

The purpose of this study is to analyze the impact of land-use and population change in rural area by new expressway. Chungbu expressway constructed in 1987, going through the south area of Kyunggi province from Seoul, was selected as a case expressway, and also 2 cities and 18 subdivisions of county in its surrounding area, as a case study area. To analyze the change characteristics before and after the construction, land-use maps of 1986 and 1996 were collected, including the census data for the years in cities and counties yearbooks. Remote sensing technology was applied to classify the land-use maps with six types of land use. Geographic information system was also used for spatial analysis, such as the land-use and accessibility changes. A 5 km buffer zone from interchange of the expressway showed about two times increase of urbanized built-up area than a 5 km buffer zone from the expressway. Accessibility from Seoul and cities was improved in most areas, which is accessing to Seoul through existing Youngdong expressway. Ten rural areas showed increased population with accessibility of average 52 minutes to Seoul and 19 minutes to cities, while eight areas showed decreased population with average 73 minutes to Seoul and 35 minutes to cities. This shows that the threshold value, which is time distance to Seoul and cities for population increase or decrease, one and half hours, respectively. Urbanized area was increased in most areas, even in population decrease areas, so this indicates that there are thinning rural areas, increasing urbanized area while decreasing population.

• 한국인구학
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• 제3권1호
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• pp.62-77
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• 1979

The purpose of this study is to explain the increasing trend of the aged population and its demographic characteristics. This study is based on the data for the aged population above 65 years old published by the Bureau of Statistics, Economic Planning Board. The increasing trend of the aged population has been analyzed and projected from 1955 to the year 2000. Some demographic charicteristics of the aged population including marital status, educational status and status of economic activities have also been analyzed in order to identify the problems associated with aging of population in Korea. The study offers the following conclusion. 1. The aged population index, the proportion of aged population to total population was 3.6 in 1975 and projected to be 6.6 in 2000. There has been steady increase of the aged population is reflected in changes of population structure. The proportional change of the aged population index was 100.0 in 1955, 109.0 in 1975 and 200.0 in 2000 respectively. 2. As for marital status of the aged population 77.6 per cent of male were married while 24.3 per cent of female were married in 1975. 22 per cent of male were widowed while it spouses died declined remarkable the mortality rate declined. 3. As the educational status of the aged, 77 per cent never attended school and 18 per cent attended from a primary school. This is very low and the number of educated men is higher than that of educated women. The rank ordering of schooling is city, Eub and Myeon in that aged. 4. The dependency ratio of the aged population was 5.9 in 1955, 6.1 in 1975 and will be 9.8 in 2000. It is gradually increasing as indicated above 20 per cent of aged population was economically active of these, they are employed in the following occupations as listed in order of the magnitude of the aged population employed. The employment status of the aged workers shows that a greater number of persons are self-employed than workers for another employer. In particular, temporary employees comprise 56.0 per cent of those employed.