• Journal of the Korean Data and Information Science Society
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• 제20권6호
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• pp.1145-1153
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• 2009

1998년부터 집계된 연령별 주민등록인구통계의 오류는 0세 혹은 출생아가 연령상승에 따라 인구수가 점점 늘어나서 6세 혹은 7세가 되는 해에 인구가 최대가 되고, 6세 혹은 7세 이후로부터 인구가 점차 감소하는 현상이 나타난다는 것이다. 본 연구는 장래의 인구추론에 가장 많은 영향을 미치는 0세-6세의 각 연령별 주민등록인구에서 미래에 1세-7세가 되는 인구를 예측하고, 최대치를 기준으로 0세-6세 인구를 '완전생명표'를 이용하여 0세-6세의 역순으로 역 추정 한다. 결론적으로 0세-6세까지의 제시된 역 추정 인구수는 기존의 인구통계데이터들 보다도 신뢰할 수 있다.

• 한국지리정보학회지
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• 제26권4호
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• pp.173-187
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• 2023

본격적인 인구감소 시대에 들어선 가운데 지방 도시들은 사회적 인구 유입도 어려운 상황을 고려하여 생활인구 유도를 통한 도시 활력 증진을 모색할 필요가 있다. 본 연구는 이동통신 빅데이터를 활용한 도시활력도 분석을 위해 인구감소 지역인 부산광역시 행정동을 대상으로 주민등록인구와 생활인구의 시공간 분포특성을 비교하였다. 다음으로 행정동을 인구증감의 변화 양상으로 유형화한 후, 도시쇠퇴 및 활력 관련 지표를 사용하여 유형별 지역 특성을 분석하였다. 시공간 분포특성 분석결과, 주민등록인구와 생활인구 밀도 분포패턴은 대체로 비슷한 패턴을 보였으나, 원도심 지역에서 주민등록인구 밀도가 낮으면서 생활인구 밀도가 높은 반대의 특성을 가지는 지역이 나타났다. 주민등록인구와 생활인구의 변화 양상은 상당한 차이를 보였으며, 주민등록인구는 밀도가 낮은 지역에서 인구가 감소하는 반면, 생활인구는 밀도가 높은 지역에서 감소하는 경향을 보였다. 생활인구 감소 군집에 인접해서 인구증감의 지역 간 격자가 큰 군집이 나타나, 인구 밀도가 높은 지역에서 주변 지역에 생활인구가 확산하는 전이효과가 나타날 가능성을 시사했다. 유형화 결과, 주민등록인구가 감소하는 지역에서도 통근·통학 또는 방문으로 인한 활발한 인구 유입이 있었으며, 이러한 지역은 사업체 수의 증가를 유지하고 있어, 산업·경제적 성장이 존재함을 확인하였다. 다만 부산의 약 47% 행정동은 주민등록인구와 생활인구가 모두 감소하고 지역 쇠퇴가 진행되고 있었으며, 이러한 지역에 대해 우선적인 도시 활력 증진을 위한 노력이 필요하다. 본 연구는 교통과 통신의 발달로 인한 도시활동의 한계거리 증가와 이동량의 증가로 지역간 교류가 날로 확대되는 점을 고려해 주민등록인구뿐만 아니라 도시계획지표로서의 생활인구 데이터의 활용 필요성을 제시하였다.

• 건축사
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• 제3권10호통권10호
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• pp.70-74
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• 1968

• 한국직업건강간호학회지
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• 제26권1호
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• pp.30-39
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• 2017

Purpose: The aim of this study was to explore the association between psychosocial work environments and depressive symptoms among Korean registered nurses. Methods: The study population of 331 registered nurses was derived from the 2014 Korean Working Condition Survey (KWCS). Depressive symptom was assessed using the WHO-5 wellbeing index. Results: The thirty-five percentage of Korean registered nurses reported the risk for depressive symptom. Korean nurses with higher 'work-family conflict' were more likely at the risk of depression almost 1.83 (95% CI 1.04~3.20) times than their counterpart. Higher 'possibilities for development' were more likely decrease almost 60% of the risk of depressive symptom. Conclusion: Work-family conflict and possibility of development were associated with depressive symptom among Korean registered nurses. We suggest future researches identifying strategies for decreasing work-family conflict and its negative effects.

• 한국약용작물학회지
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• 제11권4호
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• pp.259-263
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• 2003

This study was carried out to get basic information about the morphological and production characteristics of fennel populations different origin under different ecological conditions in Hungary. The Korean population can be registered as a medium high genotype and showed a more accelerated growth characters than Hungarian taxon and the two populations have a medium homogeneity $(CV\;=\;4{\sim}22%)$. In the second year plant height in Hungarian taxon was significantly higher than that of the Korean population. The shooting dynamic of individual plants might be heterogeneous in both taxa and the Korean population was not only shorter in the height but had also less shoots by 16% than the Hungarian one. The Hungarian taxon exceeded the umbel size and numbers to the Korean one (by 3.62 cm in the average) and the variability in the populations was high $(CV\;=\;29{\sim}49%)$. Seed size was proved to be also a discriminative feature between the examined taxa. With small deviations (CV < 2) the Hungarian population produced seeds longer by 38%. Homogeneity in the populations was dependent more on the vegetation years and on the characteristics measured but less on the origins, respectively.

• Animal Bioscience
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• 제35권5호
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• pp.659-669
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• 2022

Objective: Thoroughbred horses have been bred exclusively for racing in England for a long time. Additionally, because horse racing is a global sport, a healthy leisure activity for ordinary citizens, and a high-value business, systematic racehorse breeding at the population level is a requirement for continuous industrial development. Therefore, we established genomic evaluation system (using prize money as horse racing traits) to produce spirited, agile, and strong racing horse population Methods: We used phenotypic data from 25,061 Thoroughbred horses (all registered individuals in Korea) that competed in races between 1994 and 2019 at the Korea Racing Authority and constructed pedigree structures. We quantified the improvement in racehorse breeding output by year in Korea, and this aided in the establishment of a high-level horse-fill industry. Results: We found that pedigree-based best linear unbiased prediction method improved the racing performance of the Thoroughbred population with high accuracy, making it possible to construct an excellent Thoroughbred racehorse population in Korea. Conclusion: This study could be used to develop an efficient breeding program at the population level for Korean Thoroughbred racehorse populations as well as others.

• 농업과학연구
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• 제44권3호
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• pp.348-358
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• 2017

The green peach aphid, Myzus persicae, is one of the most serious insect pest and a vector for a multitude of viral diseases to many crops, vegetables, ornamentals, and fruit trees in the world. A large number of aphids can reduce plant vigor and cause defoliation. Many insecticides have been developed and applied to control the green peach aphid. However, this aphid has displayed a remarkable ability to establish resistance to almost every insecticide. We treated 5 different insecticides registered for M. persicae on pepper leaves and investigated the effects of the insecticides by measuring the time it took to achieve 90% control of the aphids. Acetamiprid worked faster than any other insecticides while cyantraniliprole showed the slowest insecticidal effect. Pymetrozine, pyrifluquinazon, and spirotetramet provided 90% control within similar time. Iwol population's control value was higher than any other populations 24 hours after treatment. When five different unregistered insecticides for M. persicae were treated on pepper leaves, no insecticidal effect was found for gamma-cyhalothrin and novaluron and spinosad showed an insecticidal effect of up to 70% in Iwol population only. Although chlorfenapyr and dinotefuran were not registered for M. persicae, their insecticidal effects were found to be 90% or higher.

• 농업과학연구
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• 제50권4호
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• pp.829-840
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• 2023

Various chemical pesticides are used to control diamondback moths, Plutella xylostella, which are agricultural pests that occur in cruciferous crops worldwide and cause economic losses. However, due to pesticide misuse, resistance to P. xylostella is consistently reported domestically and internationally. Therefore, we aimed to monitor and map regional resistance to devise efficient and economical control methods for P. xylostella in Korea. This study selected eight highly used insecticides among those registered against P. xylostella. P. xylostella were collected from three cities in the Gyeonggi and Yeongnam Provinces to evaluate insecticide resistance. As a result of experiments with populations collected from Yeoju, Gyeonggi Province, resistance ratios were 114.88, 54.75, 119.00, and 64.00 times higher than the susceptible population with methoxyfenozide, indoxacarb, cyantraniliprole, and fluxametamide, respectively. The resistance ratios of the Yongin population in Gyeonggi Province were 166.33 times with cyantraniliprole and 195.25 times with fluxametamide higher than the susceptible population. The Pocheon population in Gyeonggi Province showed a resistance ratio 283.23 times higher than methoxyfenozide. As a result of experiments with populations collected from Gimhae and Sangju, Yeongnam Province, the resistance ratios of the Gimhae population were 80.97, 138.00, and 89.50 times higher than the susceptible population with methoxyfenozide, cyantraniliprole, and fluxametamide, respectively. Meanwhile, the resistance ratios of the Sangju population were 85.83, 224.67, and 303.25 times higher than the susceptible population with methoxyfenozide, cyantraniliprole, and fluxametamide, respectively. The Yeongnam Province Tongyeong population showed a resistance ratio 367.28 times higher to methoxyfenozide.

• 한국인구학
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• 제13권1호
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• pp.3-25
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• 1990

Life table of Korean population for years 1983 1985 1987 and 1989 were constructed byt the National Bureau of Statics. The ago specific death rates were calculated froom the death registral ion for numerators and the estimated population by age and sex for denominators. In the course of constructing life tables, we have maole some adjustments for deficiencies in regist rat ion olata as follows. First, the non-registered portion oof infant deaths especially for neo-natal deaths was estirnateol and added too the original data. The main reason is that deaths occorring in the neo-natal period and prior to the registrat ion of birth leave little incentive for the registration of either the birth or the death. Second. t he do~hayed p(ortioon of deaths registering after one year of occurrence was estimated and added too the original data. Third t the ptortioon haying in, occuracies in ,~oge reporting was also estimated. Fourth the moving average methood was finally employed in an effort too remove the random error. The major fin(hings are as foolloows. 1. the average life expectancy at birth in 1989 is calculateol as 70.8 years in 1989, 2. a gap netween the male and female life expectancies is widened to more than 8 years toorm 1.8 years in 1906 10. It means that the female life expectancy has increased substantially, 3. the death rates of the middle - aged men starting age 40 are found to he relatively higher than those of females and younger age groups. This peculiar pattern was also found with the comparison of those of other countries.

• ALGAE
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• 제37권2호
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• pp.85-103
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• 2022

Korea is one of the most advanced countries in kelp aquaculture. The brown algae, Undaria pinnatifida and Saccharina japonica are major aquaculture species and have been principally utilized for human food and abalone feed in Korea. This review discusses the diversity, population structure and genomics of kelps. In addition, we have introduced new cultivar development efforts considering climate change, and potential carbon sequestration of kelp aquaculture in Korea. U. pinnatifida showed high diversity within the natural populations but reduced genetic diversity in cultivars. However, very few studies of S. japonica have been conducted in terms of population structure. Since studies on cultivar development began in early 2000s, five U. pinnatifida and one S. japonica varieties have been registered to the International Union for the Protection of New Varieties of Plants (UPOV). To meet the demands for seaweed biomass in various industries, more cultivars should be developed with specific traits to meet application demands. Additionally, cultivation technologies should be diversified, such as integrated multi-trophic aquaculture (IMTA) and offshore aquaculture, to achieve environmental and economic sustainability. These kelps are anticipated to be important sources of blue carbon in Korea.