• 건축역사연구
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• 제8권4호
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• pp.39-62
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• 1999

Basic concept of this study is that architectural form as a material at present has meaning for the dweller's life on the past historical plane. Main method to recover history is ethnographic interview to dwellers. Secondary method is to analyze ancestors' writings, buildings in the background of the family photos, and past drawings and then to relate them with architectural form at present. Taxonomy is a starting point: general name of the building by outside researcher is quite different from it by inside dwellers. 'Haengrang-chae', servant quarter, has never been used for servants. Function of the haengrang went outside thatched houses at the front village. Firsthand observation or simple analyses as results of several precedent research are reexamined and criticized through this study. The mansion has moaning when we synthesize with the site location based on farming land and tenant farmer, and decline of the Kyongpo Lake. Territoriality of the mansion is reinterpreted to 'In-Out Structure' by Yin-Yang thinking, Dwellers extend buildings gradually to outside village, surrounding rear hills, the lake, DongHae Sea, and finally goes to imaginative Taoist heaven beyond real nature through the literary life. Confucius principle, known to govern upper class house at Yi Dynasty also affect general composition of the buildings: perpetuation of the family by ancestor worship, elder dominance and male dominance, fraternity love in the extended family, charity display by reception of guests, Taoist scholarly life harmonized with nature. However, the study of the particular life and usage of the dwellers reinforces or corrects general supposition of precedent researches. Unique shape of the house has been formed by convenience of the dwellers' life style, early modernized free thought over the rigid Confucius design principle, and female power in male dominant society.

• 가족자원경영과 정책
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• 제19권4호
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• pp.1-17
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• 2015

This study is aimed to discover the deciding factors in senior employment programs for improving the quality of life for the elderly. The dependent variable used in this study was the quality of elderly persons. Personal and familial characteristics, and the community involvement of the elderly were used as independent variables in a Multiple Regression analysis. First, the most influential factor encouraging the elderly to participate in a senior employment promotion program was previous experience of senior employment programs. Second, health condition, residence in city areas, experience of volunteer work, and knowledge of senior employment programs had positive effects on the continuous participation of the elderly men and women. However, living arrangements had an effect solely on elderly men, and home ownership and participation in economic activities had effects solely on elderly women. Third, the life quality of the elderly was affected differently by sex. Health condition had the greatest effect on male elderly persons, whereas, the effective variable, the composition of the family had the most effect on female elderly persons. Thus, active campaigns through various mass media and information sessions are needed to promote participation in senior employment programs, according to the above mentioned deciding factors. In particular infrastructure providing the elderly with more volunteer work opportunity needs to be built for baby boomers to improve their quality of life. In addition, diversified senior employment programs are needed. Because the elderly living in city areas are more willing to participate in senior employment programs, specialized programs suitable for the elderly in city areas are needed. The government should also prepare programs that help the elderly stay healthy while they are working.

• Journal of Korean Medical Science
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• 제33권50호
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• pp.320.1-320.8
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• 2018

Background: Muscle mass and muscle function are related to depressed mood in studies of adults. Like adults, Korean students are highly likely to suffer from decreased muscle mass due to social conditions. In this study, we evaluated the muscle mass status of Korean adolescents and assess the effect of muscle on depressive mood. Methods: A total of 1,233 adolescent boys and girls participants from the Korea National Health and Nutrition Examination Survey were enrolled in our study. Participants underwent dual-energy X-ray absorptiometry for assessment of appendicular muscle mass and completed questionnaires regarding depressed mood, stress, suicidal ideations, and attempts. Results: There was no difference in depressive mood according to muscle mass among boys (P = 0.634); girls with decreased muscle mass had a greater tendency for depressed mood compared to girls with optimal muscle mass (P = 0.023). After adjusting for age, waist circumference-to-height ratio, smoking status, alcohol consumption, frequency of physical activity, self-reported obesity, weight-loss efforts, and monthly household income, girls with low muscle mass (LMM) were 2.60 times more at risk of developing depression than girls with normal muscle mass (95% confidence interval [CI], 1.05-6.49; P = 0.040). This trend was similar for girls with LMM with obesity (95% CI, 1.00-11.97; P = 0.049). Conclusion: Adolescent girls who have insufficient muscle mass are more likely to report depressed mood than girls who have ideal muscle mass. Interventions for maintaining proper muscle mass are required.

• 한국물환경학회지
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• 제35권2호
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• pp.152-164
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• 2019

In this study, a Benthic Macroinvertebrates Family Index (BMFI) was developed using 100 indicator groups (99 families including Chironomidae with 2 phena). Families were assigned a score between 1 and 10 depending on their sensitivity to organic pollution. The BMFI was composed of the sensitivity and relative abundance of the indicator taxa. Sensitivity values of each group were generally similar to Biological Monitoring Working Party (BMWP) scores or Walley, Hawkes, Paisley, Trigg (WHPT) scores of UK, Japanese BMWP scores, and the FBI tolerance values of North America. However, sensitivity values of some taxa were significantly different from those of foreign countries, which seemed to have resulted from discrepancy in species composition, difference of taxonomic classification system, or methodological difference for estimation of sensitivity. As an annual average level, BMFI showed significant correlation with concentration of 5-day biochemical oxygen demand (BOD5) (correlation coefficient r = -0.80, n = 569 sites), total suspended solids (r = -0.68), and total phosphorus (r = -0.79). In addition, BMFI revealed strong correlation with Shannon-Weaver's species diversity (r = 0.85), Margalef's species richness (r = 0.85) and McNaughton's dominance (r = -0.84). Correlation between BMFI and water quality parameters or community indices such as species diversity did not show significant difference compared to that of species-level indices such as BMI (Benthic Macroinvertebrates Index). This means that BMFI is a more useful indicator in terms of easy identification of organisms. BMFI was used to assess the environmental status of 3,017 sites of Stream Ecosystem Survey conducted by the Korean Ministry of Environment between 2016 and 2018. As a result, about half of all sites appeared to be in good condition, and a quarter in poor condition.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVI)
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• pp.152-156
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• 2005

본 연구에서 수행한 avermectin 생산을 위한 배지 최적화에서 기존의 총 avermectin의 함량 10 mg/L를 470 mg/L까지 증가시켰으며, 이 중 광범위 활성을 가지는 avermectin B1도 50%에 달했다. 최적화된 배지 조성은 50 g/L fructose, 30 g/L malt extract, 5 g/L casamino acid, 2.5 g/L PEG 3,350, and 1 g/L $K_{2}HPO_{4}$이다. $K_{2}HPO_{4}$와 fructose, malt extract가 avermectin 생합성에 크게 작용하는 것으로 추정된다.

• Journal of Ecology and Environment
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• 제44권3호
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• pp.143-154
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• 2020

Background: Korean wild boars (Sus scrofa coreanus Heude), because of their adaptability, are a widespread large mammal; however, they sometimes cause problems by invading farms and eating the crops, creating insufficiencies of some foods in South Korea. To understand the diet composition of Korean wild boars according to sex and body size, we collected their feces from Mt. Jeombongsan, Seoraksan National Park, South Korea. The sizes of fecal samples were measured, and genomic DNA was extracted from the samples. We amplified specific loci targeting plants (rbcL and trnL) and animals (COI) to detect the food sources of this omnivore and amplified the ZF and SRY regions to determine the sex. Results: In the wild boar feces, Rosaceae and Bryophyte were the most frequently detected plant food sources at the family level and Diptera and Haplotaxida were the most frequently detected animal food sources at the order level. As a result of sex determination, the sex ratio of wild boars collected in the Mt. Jeombongsan area was approximately 1:1. Our result suggested that there is no significant difference between the diet composition of male and female boars. Based on the average cross-sectional area of the feces, the top 25% were classified into the large body size group and the bottom 25% were classified into the small body size group. The large body size group mainly preferred Actinidiaceae, and the small body size group most frequently consumed Fagaceae. The diet of the large body size group was more diverse than the small body size group. Conclusions: Our results showed that the wild boars preferred Rosaceae, especially Sanguisorba and Filipendula, as plant food sources, and Diptera and Coleoptera of Insecta as animal food sources. Based on the results, the dietary preferences of wild boar appear to be distinguished by not their sex but their body size. Our study could help to elucidate the feeding ecology and population structure of wild boar, as well as address conservation and management issues.

• Asian-Australasian Journal of Animal Sciences
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• 제30권1호
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• pp.100-110
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• 2017

Objective: The gastrointestinal tract of sheep contain complex microbial communities that influence numerous aspects of the sheep's health and development. The objective of this study was to analyze the composition and diversity of the microbiota in the gastrointestinal tract sections (rumen, reticulum, omasum, abomasum, duodenum, jejunum, ileum, cecum, colon, and rectum) of sheep. Methods: This analysis was performed by 454 pyrosequencing using the V3-V6 region of the 16S rRNA genes. Samples were collected from five healthy, small tailed Han sheep aged 10 months, obtained at market. The bacterial composition of sheep gastrointestinal microbiota was investigated at the phylum, class, order, family, genus, and species levels. Results: The dominant bacterial phyla in the entire gastrointestinal sections were Firmicutes, Bacteroidetes, and Proteobacteria. In the stomach, the three most dominant genera in the sheep were Prevotella, unclassified Lachnospiraceae, and Butyrivibrio. In the small intestine, the three most dominant genera in the sheep were Escherichia, unclassified Lachnospiraceae, and Ruminococcus. In the large intestine, the three most dominant genera in the sheep were Ruminococcus, unclassified Ruminococcaceae, and Prevotella. R. flavefaciens, B. fibrisolvens, and S. ruminantium were three most dominant species in the sheep gastrointestinal tract. Principal Coordinates Analysis showed that the microbial communities from each gastrointestinal section could be separated into three groups according to similarity of community composition: stomach (rumen, reticulum, omasum, and abomasum), small intestine (duodenum, jejunum, and ileum), and large intestine (cecum, colon, and rectum). Conclusion: This is the first study to characterize the entire gastrointestinal microbiota in sheep by use of 16S rRNA gene amplicon pyrosequencing, expanding our knowledge of the gastrointestinal bacterial community of sheep.

• 보건교육건강증진학회지
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• 제26권1호
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• pp.51-61
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• 2009

Objectives: The objective of this study was to identify the factors associated with the percentage of body fat and bone mineral density (BMD). Methods: 886 students of the 4, 5, 6th grade were sampled from 6 elementary schools in Daejeon city from May to June 2005. Participants completed the questionnaire on socio-demographic factors, eating habits and physical activities, and had the measurements of body composition, BMD, height and weight. T-test, one-way ANOVA and ANCOVA were used to compare body composition and BMD among groups defined by study factors. Multiple regression analysis was used to determine the factors related with percentage of fat and BMD in each sex. Results: When adjusting age, height, weight and family income, the amount of food intake and regular exercise including the days of exercise per week and the daily exercise duration were significantly associated with percentage of fat in boys, but not in girls. When adjusting the same variables, regular exercise, the days of exercise per week and the daily exercise duration were positively associated with BMD in both sexes. Conclusion: Regular exercise with one or more days per week were the common factor to decrease percentage of fat and increase BMD in school children. This showed that regular exercise program could improve the body composition of school children.

• 한국자원식물학회지
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• 제19권2호
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• pp.259-264
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• 2006

본 실험은 꼬리고사리과에 속하는 3종의 양치식물들(꼬리고사리, 거미고사리 및 변산일엽)에서 배지의 조성물질과 물리적 조건 및 생장조절물질이 전엽체 생장에 미치는 영향을 구명하기 위하여 수행하였다. 3종 모두에서 전엽체 배양에 적합한 배지는 MS배지로 확인되었다. 배지 내 $NH_4^+:NO_3^-$의 적정 농도비율은 꼬리고사리와 변산일엽의 경우 20:40mM(1:2 비율) 이었으며, 거미고사리는 30:30mM(1:1 비율) 이었다. 전엽체 생장에 적합한 당 농도는 $1{\sim}2%$였으며, pH는 $3.8{\sim}5.8$이었다. 배지에 첨가된 agar 농도는 전엽체 생장에 별다른 영향을 미치지 않는 것으로 나타났다. 6종의 생장조절물질(NAA, IA4, 2,4-D, BAP, kinetin 및 2ip)을 배지에 첨가하여 3종의 전엽재를 배양한 결과, 시토키닌류의 경우 생장촉진효과가 관찰되었으나 옥신류는 농도가 높아질수록 전엽체의 생장을 저해하는 것으로 확인되었다.

• 한국농촌건축학회논문집
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• 제10권3호
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• pp.51-58
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• 2008

The Youth Hostel in Korea, differently from that of other countries, has been introduced in order to attract School Excursion Group, and was developed as one of Youth Training Facilities. Youth Hostel as Youth Training Facility can be utilized as a healthy experiential space for youth education, as a stage for an international interchange, as a field for the lifelong education of various classes, and is also the Lodging Accommodation which is now highly appearing of the demand as a safe and educational lodging place to both individuals and family-unit tourists. The Purpose of this Research is aimed to provide the necessary fundamental materials to the planned forthcoming future Youth Hostel, after grasping of such present status as well as its structure and composition of space and spacial characteristic. Since Youth Hostel in Korea is managing on the center of the basis for youths and other groups, in order to compute the proper heads, it is required the scale-level which can accommodate all students in One-Unit Grade of a school at minimum. Accordingly, it seems that must be equipped with accommodating capacity of more than 300~400 persons. As because of recent quality-improvement in the portion of Youth Hostel Lodging, it is under planning with containing of the Sanitary Space at inside of lodging room, and Self-Cooking Space as well. In compliance with such various particulars, it looks that the lodging area should be at least more than $3.5m^2$ per a person.