• Journal of Conservation Science
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• v.36 no.3
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• pp.178-186
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• 2020

Verdigris is a traditional artificial pigment reported on old research papers and according to the methods mentioned in the literature, it is manufactured by the corrosion of copper or copper alloys using vinegar and by further scraping the generated rust. Since the Three Kingdoms Period, various household products with copper alloys, such as bronze and brass, have been used, and pigment analysis of these cultural heritage items has revealed the presence of tin, zinc, lead, and copper in green pigments. Based on these data, five types of verdigris were prepared from copper and copper alloys, and analyzed. the analysis results revealed a bluish green pigmentation, and the chromaticity, particle shape, and oil absorption quantity of each verdigris differed based on the type of copper alloy used in its preparation. The main components of verdigris are Cu, Sn, Zn and Pb, and their proportions depended on the type of copper alloy used during manufacturing. However, the main constituent mineral of the pigments is the same as 'hoganite[Cu(CH₃COO)₂·H₂O]', regardless of the copper alloy used. The result of accelerated weathering test for stability evaluation revealed that verdigris was discolored rapidly, thereby indicating that its stability was low, in particular, the pigments comprising lead presented relatively lower stability.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.1
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• pp.101-111
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• 2018

The Korean government has been trying to conserve a marine ecosystem that has been shifting due to climate change. As part of this effort, the government designated seventy-seven marine species that have been disappearing and deserve to be protected as endangered managing them specially. To generate basic data to guide policy for these endangered species, their value must be measured. OOf the species declared endangered, coral is particularly threatened by climate change, and its management is important. Accordingly, understanding the potential value of reefs, can be an effective way of proving the benefits of continuous management to decision makers and the general public alike. To this end, we have applied the contingent valuation method (CVM), an economic technique of for valuing a environmental and non-market goods such as a coral reef. A national face-to-face survey of 1,000 randomly selected households was conducted in order to determine the public's willingness to pay (WTP) for conserving coral reefs. A one-and-one-half-bound (OOHB) model was adopted to interpret WTP responses, and a spike model was employed to deal with zero WTP responses. The results show that the conservation value of a coral reef can be estimated at 3,016 won per household per year, statistically significant at the 1 % level. Expanding values to the national population gives an annual value of 58.9 billion won. We can conclude that the public is willing to pay a significant amount to conserve coral reefs.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.3
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• pp.287-295
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• 2010

Dust samples have been collected from streets, schools, subway stations and households in Daegu metropolitan city. Samples were sieved through a 100 ${\mu}m$ mesh and the concentration of 14 elements have been determined using by ICP after acid extraction. Results showed that Ca, Fe, K, Mg, Mn, Na and V were influenced by natural sources while Cd, Cr, Cu, Ni, Pb and Zn were influenced by anthropogenic sources. The measured values were remarkably higher in components from natural sources than in components from anthropogenic sources. In particular, school dust had higher levels of Ca and Pb and subway station dust had higher levels of Cu and Zn. The percentage composition of chemicals from subway stations, households, and schools were remarkably higher in components from anthropogenic sources than that from streets. It is well recognized that anthropogenic sources were affected by indoor dust. Results of pollution index of hazardous heavy metals indicated that schools, households, and subway stations were more contaminated than streets and urban areas typically had higher pollution index than rural areas. The correlation analysis among trace elements seem to suggest that there were correlations between components of soil/road dust resuspension, and components of waste incineration and fuel combustion.

• Environmental Analysis Health and Toxicology
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• v.28
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• pp.15.1-15.8
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• 2013

Objectives The aim of this study was to determine the association between low-level mercury exposure and neurobehavioral functions in adults living in coastal regions of Korea. Methods We selected 172 adults aged 20-65 years living in a city in the coastal region of Korea. A sociodemographic survey was conducted, mercury levels in the blood, urine, and hair were measured, and the associations according to computerized neurobehavioral tests were determined using univariate analysis. After adjustment for associated variables, a multivariate linear regression analysis was performed. Results The geometric mean mercury levels in the blood, urine, and hair were $5.41{\mu}g/L$ (range, $0.00-15.84{\mu}g/L$), $1.17{\mu}g/g$-creatinine (range, $0.00-32.86{\mu}g/g$-creatinine), and 1.37 mg/kg (range, 0.42-6.56 mg/kg), respectively. Variables that were associated with simple reaction time according to the neurobehavioral test results were age and urine mercury level. Variables associated with choice reaction time were the recent use of Korean traditional medicine and urine mercury level. Variables associated with the right-hand finger tapping speed test were age, gender, smoking behavior, education level, monthly household income, and urine mercury level. Variables associated with the left-hand finger tapping speed test were age, gender, education level, and urine mercury level. After adjustment for associated variables, there was no significant association between urine mercury level and simple reaction time (${\beta}=25.96$; p =0.47), choice reaction time (${\beta}=50.37$; p =0.32), or the number of left-hand finger taps (${\beta}=-1.54$; p =0.21). However, urine mercury level was significantly associated with the number of right-hand finger taps (${\beta}=-3.86$; p =0.01). Conclusions We found no evidence that low-level mercury exposure in adults is associated with deficits in neurobehavioral functions. A longer follow-up study is required to confirm this conclusion.

• Journal of the Korea Organic Resources Recycling Association
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• v.22 no.1
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• pp.40-48
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• 2014

Due to increasing greenhouse gas emissions, global warming and abnormal weather phenomena it has become important on a national level to keep a count of greenhouse gases being emitted. We want to take advantage of any selected area, as the basic data for the calculation of greenhouse gas emissions, Forest and Grassland, Paddy fields, and Fields(crops), Greenhouse(crops), Pig farm, Cattle farm, Farm household(populations, agricultural machinery) and Vehicle, the basic building blocks shots with a small amount of per-unit basis, the statistics calculated based on regional carbon emissions through the literature and experimental. Carbon absorption 772,960 ton C/year, amount of fixation 487,477 ton C/year, amount of emission 1,112,607 ton C/year were noted in Gimje-si, and amount of carbon absorption 55,559 ton C/year, amount of fixation 25,864 ton C/year, amount of emissions 58,355 ton C/year in Gongdeok-myeon, respectively. The carbon absorption at Hwangsan-ri is 25,107 ton C/year, fixation 4,301 ton C/year, and emission 20,330 ton C/year respectively. We were able to estimate the amount of carbon according to the specific characteristics of each unit village, then expanding it to a large-scale and comparative analysis, therefore we were able to obtain basic data on the national levels of carbon absorption.

• Journal of Biomedical Engineering Research
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• v.33 no.4
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• pp.184-193
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• 2012

Many studies have reported that housework done using household appliances may affect biomechanical characteristics of the musculoskeletal system. The purpose of this study was to investigate the effects of housework done using a pulsator washing machine on joints and muscles. We calculated joint torques and muscle strengths on the basis of an experimental/virtual three-dimensional motion analysis for six healthy females using the pulsator washing machine at different heights (H) and depths (D) of the inside drum (H (mm){\times}D (mm), Trial1: $962.5{\times}609.4$, Trial2: $962.5{\times}624.4$, Trial3: $982.5{\times}644.4$, Trial4: $995.5{\times}642.4$, Trial5: $1015.5{\times}677.4$). The joint torques and muscle strengths tended to be considerably different during torso flexion in the sagittal plane for all the trials. The maximum joint torques for the thoracic vertebra, left ankle, and right shoulder measured in Trial4 were significantly higher than those measured in the other trials (p < 0.05); in addition, those for the thoracic vertebra and both ankles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). The maximum muscle strengths for the left trapezius muscle and both tibialis anterior muscles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). These results indicate that housework done using a pulsator washing machine may affect joint torques and muscle strengths, and these effects are dependent on the height and/or depth of the inside drum of the pulsator washing machine.

• Journal of Nutrition and Health
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• v.51 no.2
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• pp.168-176
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• 2018

Purpose: This study was conducted to analyze food consumption behavior of women by marital status based on the 2015 consumer survey data on Food Consumption Behaviors of the Korea Rural Economic Institute. Methods: We analyzed data describing 3,312 women aged 19 ~ 75 who were the main buyers of foods in their household. The food purchase patterns, dining-out behavior, and use of food-delivery and take-out were investigated. Results: Overall, 40.5% of unmarried women shopped for food once per week and 37.4% spent 200,000 ~ 400,000 won per month. Additionally, 43.1% of married women shopped 2 ~ 3 times per week and 26.6% spent 400,000 ~ 600,000 won (p < 0.0001). Dining-out frequency and one-time cost per person of dining-out for unmarried women were higher than those for married women. With delivery/take-out food frequency, 2 time per week was the highest rate among married women (34.6%) and once per week was the highest among unmarried women (31.2%) respectively. Conclusion: The results of this study indicate food consumption behaviors and trends of Korean women by marital status. This study provides basic data that will be useful for food industries establishing marketing strategies to better meet consumer demands.

• Journal of Nutrition and Health
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• v.53 no.4
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• pp.406-415
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• 2020

Purpose: This study examined the association of fruit and vegetable consumption with asthma in Korean adults. Methods: Data on 16,528 adults aged 19-64 were collected from the Korea National Health and Nutrition Examination Survey (KNHANES). The general characteristics of the subjects, daily food intake, and daily energy and nutrients intake were investigated according to fruit and vegetable consumption. All statistical analyses were conducted based on SAS software version 9.4. Results: The prevalence of doctor-diagnosed asthma was 2.6%, and ranged between 1.8% and 3.1% depending on fruit and vegetable consumption. As fruit and vegetable consumption increased, the individuals showed a higher average age and household income, but a lower educational level, smoking rate, and frequency of alcohol consumption. The group with higher fruit and vegetable consumption had higher intakes of all food groups without milk and dairy products and energy and nutrients than the counterpart group. For the intake rate of energy, the group with higher consumption of fruit and vegetables had a higher intake rate of carbohydrate and protein and a lower intake rate of fat. The risk rate of asthma with the third quartile group regarding fruit and vegetable consumption was 35%-40% lower than that of the first quartile group. Conclusion: The results suggest that adequate consumption of fruit and vegetable will help to improve the risk of asthma. Moreover, prospective cohort studies and clinical test research are necessary to measure the effects of fruit and vegetable consumption on the occurrence of asthma.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.12
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• pp.561-568
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• 2016

The purpose of this study was to investigate the influence of SNS addiction tendency, pathological narcissism, social support, and stress among university students. Data were collected via questionnaires from 385 students and were analyzed by descriptive statistics, t-test, ANOVA, Scheffe's test, Pearson's correlation coefficients, and Stepwise multiple regression analysis using SPSS/WIN 19.0 program. The levels of SNS addiction tendency depended on gender, SNS usage time, SNS over-usage, health problem, and household economic status. SNS addiction tendency was significantly correlated with pathological narcissism, social support, and stress. Influential factors that affect SNS addiction tendency were pathological narcissism, SNS usage time, SNS over-usage, gender, social support, and academic performance, which explained about 39.4% of the variance. The results of this study indicate that nursing interventions are necessary to improve SNS addiction tendency, and also suggesting that such variables should be carefully considered in intervention programs for university students.

• Child Health Nursing Research
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• v.9 no.3
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• pp.309-322
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• 2003

Purpose: This study was carried out to show the parental child-rearing attitudes perceived by daughters(woman college students), who were in the process of pursuit of resonable values, ethics and preparing for marriage and settling down, and another purposes were to help them to have positive attitudes toward their child-rearing in the future and set up preliminary parenting education program. Method: The subjects were 120 woman college students who were freshmen to junior in one university in Seoul. Using the self-report questionnaire, data were collected from December in 1999 to March in 2000. The contents which subjects wrote down were categorized by content analysis method. Result: 1) The age range of subjects were 19-25 years old and main rearer was mother(85.84％). 2) The perception of parent's child-rearing by subjects were revealed 555 statements and then tied together 50 themes: 'emphasizing on studying hard'(8.3％), 'doing by oneself'(5.6％), 'sternness'(5.2％), 'respect of personality'(4.5％), 'eagerness'(4.0％), 'humanity education'(4.0％), 'moderating in daily living'(4.0％), 'propriety education'(3.8％), 'sacrificing for children'(3.6％), 'expectation'(3.2％), 'concerning'(3.1％), 'parent-centered'(3.1％), 'giving a free hand'(2.9％), 'sharing with'(2.9％), 'consideration'(2.7％), 'over-protectiveness'(2.3％), 'hostile attitude' (2.2％), 'corporal punishment'(2.2％), 'expression of parental love'(2.0％), 'encouragement'(1.8％), 'family-centered' (1.8％), 'treating fairly'(1.6％), 'offering live experiences'(1.6％), 'exacting obedience'(1.62％), 'exemplary parental role' (1.6％), 'sexual discrimination'(1.6％), 'cooperation'(1.4％), 'giving favors'(1.4％), 'indifference'(1.4％), 'understanding' (1.3％), 'confidence'(1.3％), 'intimacy'(1.3％), 'pursuit of health'(1.3％), 'warm-hearted'(1.1％), 'stinginess'(1.1％),'broad-mindedness'(0.7％), 'granting'(0.7％), 'interfering'(0.7％), 'reproach'(0.7％), 'distinction of sex in household affairs'(0.7％), 'help'(0.5％), 'preparing for the future'(0.5％), 'disregarding'(0.5％), 'making environment'(0.4％), 'bringing up a child personally' (0.4％), 'comparing'(0.4％), 'religious life'(0.4％), 'good deed'(0.4％), invasion of privacy' (0.2％), 'controlling desire'(0.2％). 3) 50 themes were categorized by 18 categories once more: 'control' (13.2％), 'crazy for education'(12.3％), 'endeavoring'(8.6％), 'autonomy'(8.5％), 'home education'(7.7％), 'esteem' (6.67％), 'support'(6.67％), 'pursuit of healthy daily life'(5.6％), 'earnestness'(5.4％), 'disregarding personality'(5.4％), 'emotional bonding'(3.2％), 'imposing a burden'(3.2％). 'inhospitality'(3.1％), 'acceptance'(5％), 'discrimination'(2.3％), 'mature parenthood'(1.8％), 'strengthening family tie'(1.8％), 'psychological intimacy'(1.1％). 4) On the basis of this study, 3/5 of subjects(61.2％) perceived their parents had mature and autonomous child-rearing attitudes, and on the other hand 2/5(39.5％) of them perceived controlling, just forcing to work harder and personally disregarding attitudes. Conclusion: So we need to offer them nursing implementation such as preliminary parenting education program and parenting consulting like to strengthen positive perception and help improving in realistic, developmental child-rearing attitudes.