• Journal of the Korea Organic Resources Recycling Association
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• v.24 no.3
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• pp.91-99
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• 2016

The objective of this study was to investigate characteristics of inorganic components contained in liquid fertilizer produced using fish meal under different condition. Addition of dry yeast to liquid fertilizer resulted in considerable change in pH and electrical conductivity(EC) value compared to other liquid fertilizers which have microorganisms additives. In addition, it was appeared that the dry yeast-added treatment had higher $NH_4-N$ concentration than other treatments. Addition of molasses resulted in low pH compared to the control which has no additives. The EC, concentration $NH_4-N$ and $P_2O_5$ were not significant difference according to addition of molasses. The pH and $NH_4-N$ concentration in liquid fertilizer containing 20% of fish meal was highest after fermentation process, and EC value increased as the content of fish meal increase. When Cucumber was cultivated using liquid fertilizer, there was no difference in growth between fish meal liquid fertilizer treatment and chemical fertilizers treatment. However, there was a difference in yield according to the supply amount of nitrogen during the growing season.

• Korean Journal of Food Science and Technology
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• v.23 no.2
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• pp.123-128
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• 1991

Addition of two different salt mixtures of sodium phosphates, Ca-EDTA, $NaNO_2$ and sodium citrate were investigated for their effects on relative viscosity, textrue, sensory properties of kimchi and solids contents of kimchi and kimchi liquid during fermentation at $4{\sim}3.5^{\circ}C$. The salt mixtures were added into half fermented kimchi with the concentration range of $0.001{\sim}0.01\;M$. The results showed that higher values in viscosity of kimchi liquids were obtained for those fermented at low temperature and with salts mixtures added. The hardness of Chinese cabbage was gernerally increased until pH 4.0 reached and then decreased thereafter for those fermented without salts mixture. However the salts added kimchi showed no decrease and a slightly harder texture measured at the late stage of fermentation. Soluble solids concentration steadly decreased in kimchi liquids for those salts mixture added while those without salts mixture were initially increased followed by slow decrease. Comparison of sensory properties showed that the degree of changes was reduced when salt mixture was added. Higher scores in fresh-sourness and acidic taste, hardness and chewiness in texture and lower moldy odor were obtained when the data was compared for those kimchi having the pH range of $4.0{\sim}4.2$.

• Journal of Cadastre & Land InformatiX
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• v.49 no.2
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• pp.109-122
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• 2019

The expansion of double-income households is increasing the social interest in child care. In particular, children's entrance into elementary school is considered to be the main cause of women's career break as well as childbirth. This study proposes an optimal location selection method for caring facilities for elementary school students. As a candidate for care facilities, we selected existing child care facilities. We proposed a dual structure evaluation method that considers locational characteristics as well as mathematical optimization when selecting the optimal location. The experiment was conducted in Songpa-gu, Seoul. A total of 36 optimal locations were selected from a total of 258 candidate facilities. First, the evaluation criteria were established using public data, and the primary candidate facilities were selected by ranking the location scores. At this time mesh resampling method was used to integrate various public data into one. Next, the final care facilities were selected using the p-median method. The results chosen are not only the optimal location considering total distance but also satisfy various location criteria considering the characteristics of the care facility. We expect that the proposed method will contribute to public data convergence or utilization and it will be helpful for policy decision when selecting the optimal location for public facilities.

• Korea journal of population studies
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• v.21 no.2
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• pp.37-57
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• 1998

In recent, Korea introduced the local self-government system. And the local government tried to establish and implement plans for women. Those plans were established on the basis of not the particular environments of regional societies but similar policies of central government. Despite of geographical migrations, we can find differences of population structure and economic status among regions. As the result, most of regional policies for women were ineffective. This paper examines population structure and economic status of women by regions and recommends the long and medium direction for local policies for women. For analysis, it utilizes the 2% sample data-set of National Statistical Office's '1995 Population and Housing Census' in Korea. The findings of this paper are summarized as following; Firstly, the dependency rate of Chungchong-do, Cholla-do, Kyongsangnam-do will reach about 45% in 2000. Therefore, as soon as possible, those local government should establish the labor policies to enhance the economically active participation rate of the elderly persons and welfare policy for them. Secondly, the level of women's economic participation. Thus, local governments should set up labor market policies for women according to regional situations. For examples, in Kyonggi-do, Seoul, Daejeon, Daeku which unemployment rate of the highly educated women are relatively high, those local governments should seek the measures to tackle unemployment problem of them. Thirdly, due to the differences regional economic structure, women's employment structures differed also by region. Hence, local governments should formulate suitable plans to consider the working status of regional women's workers.

• Korean Chemical Engineering Research
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• v.50 no.3
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• pp.567-573
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• 2012

Compared with the natural marble, the artificial marble has the advantages of excellent appearance, high degree of finish, even color, fine pressure and wear resistance, bear erosion and weathering, etc. It can be widely used in kitchen countertops, bath vanity tops, table tops, furniture, reception desks, etc. However, large amounts of artificial marble waste such as scraps or dust have been generated from sawing and polishing processes in artificial marble industry. Waste from artificial marble industry is increasing according to demand magnification of luxurious interior material. Artificial marble wastes can be recycled as aluminum oxide used as raw materials in electronic materials, ceramics production, etc., and methyl methacrylate(MMA) which become a raw material of artificial marble by pulverization, pyrolysis and distillation processes. The characteristics of artificial marble wastes was analyzed by using TGA/DSC and element analysis. Crude aluminum oxide was obtained from artificial marble waste by pulverization and thermal decomposition under nitrogen atmosphere. In this work, Box-Behnken design was used to optimize the pyrolysis process. The characteristics of crude aluminum oxide was evaluated by chromaticity analysis, element analysis, and surface area.

• Journal of Digital Convergence
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• v.18 no.7
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• pp.9-19
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• 2020

The purpose of this study is to analyze the difference in suicide rates between regions and to determine the effect of social workers on the regional suicide rate. The main analysis results are as follows. First, the suicide rates in metropolitan cities were lower than was lower than in other regions, and cities and districts were lower than those in the county area. Second, suicide rates were high in areas with many cultural and social welfare facilities per population. Suicide rates were high in low mental health facilities and low social welfare budgets. The suicide rate in rural areas was high. Third, suicide rates were high in areas with low economic requirements, areas with a high proportion of the elderly, divorce rates, and areas with a small number of social security recipients and living alone. In other words, the suicide rate in rural areas was high. Finally, social workers did not affect the difference in local suicide rates. Local social services and budgets have no real impact on suicide rates. In the future, it is necessary to improve the quality and quantity of community welfare practices that can lower community suicide rates.

• Korean Journal of Food Science and Technology
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• v.37 no.4
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• pp.579-583
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• 2005

Effects of sangwhang mushroom (Phellinus linteus) powder and extract on quality of wet noodle were investigated by adding sangwhang mushroom powder at 2% (w/w: II) of wheat flour and extract at 17 (v/w: III) and 34% (v/w: IV) based on flour source, respectively. Significant decreases were found in L values of dough and noodle, while a and b values increased in proportion to addition of sangwhang mushroom. Addition of sangwhang mushroom decreased volume of cooked noodles, but increased turbidity of soup. Tensions of cooked noodle samples of II, III, IV, and control were 12.17, 17.61, 17.57, and 14.90g, respectively. Sensory properties, including color, flavor, taste, and texture, of noodles added with sangwhang mushroom extracts (III, IV) were significantly superior to control (I) and noodle added with powder (II). These results suggest addition of sangwhang mushroom extract is more suitable than powder for noodle processing.

• Fire Science and Engineering
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• v.29 no.1
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• pp.12-18
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• 2015

This study has conducted an experiment of comparing the flame resistant performance and combustion characteristics according to flame resistant treatment using the Cypress Luba and particle board that is commonly used for interior decoration and furniture. As a result of testing the flame resistant performance of Cypress Luba, the Cypress Luba injected with flame resistant resin using the vacuum pressure treatment has shown to have better performances (carbonized area 9.55% and carbonized length 22.91%) than the Cypress Luba treated with flame resistant coating having rubberized plastic components on its surface. For particle board, the specimen attached with fireproof film was identified to be better (carbonized area 40.10% and carbonized length 43.40%) than the specimen with non-fireproof film. For the results of combustion characteristics using the Cone Calorimeter, the specimen treated with flame resistant coating on the surface had faster ignition than the Cypress Luba injected with fire resistant resin using vacuum pressure treatment, and in the total release of calories, the Cypress Luba injected with fire resistant resin using vacuum pressure had $68.2MJ/m^2$, and the specimen treated with fire resistant coating on the surface had $111.52MJ/m^2$. For the particle board, the ignition time had a little difference but in the total release of calories, the specimen attached with fireproof film had $90.1MJ/m^2$ and the specimen with non-fireproof film had $107.6MJ/m^2$.

• Journal of Society of Occupational Therapy for the Aged and Dementia
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• v.12 no.2
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• pp.57-65
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• 2018

Objective : The purpose of this study was to compare the demographic characteristics, health and quality of life between general adults and adults living with dementia. Method : The data were collected using raw data of the 2016 community health survey and compared between 2,592 adults living with dementia patients and 225,840 general adults. health were assessed for sleep time, stress level, depression, and subjective health status, and quality of life was measured by EQ-5D. Result : In comparison of demographic characteristics, age and family number of adults living with dementia patients were significantly higher than general adults (p<.001), income and eduation levels were low (p<.001), and marital status was higher rate of living with spouse (p<.05). In comparison of health status, adults living with dementia patients were significantly longer in sleep time than the general adults (p<.001), and stress level was higher (p<.001), the percentage of experience of depression was higher (p<.001), and the subjective health status was worse (p<.001). Adults living with dementia patients were significantly lower in quality of life total score and all sub-domain than general adults (p<.001). Conclusion : Based on the results of this study, it is necessary to seek ways to improve the health and quality of life of dementia patients' families.

• Journal of agriculture & life science
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• v.53 no.3
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• pp.41-49
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• 2019

Consumers are interested in natural ingredient that replace synthetic antioxidants in meat products. This study was carried out to investigate the effects of astaxanthin (AX) on the oxidative stability and quality characteristics of emulsified sausages during cold storage. Emulsified sausages were prepared as follows: manufactured without AX and BHT (Control), added with 500 mg/kg of BHT (BHT), and added with 80 mg/kg of AX (AX). Addition of AX showed no significant difference in pH, emulsion stability and cooking yield of emulsified sausages (p>0.05). However, the initial color retentivity was the same as that of synthetic antioxidant such as BHT treatment, and the redness was higher when AX treatment was added (p<0.05). The lipid oxidation showed the lowest value in the BHT treatment at the end of storage and the AX treatment also was significant lower than that of control (p<0.05). Hardness was lower in the all treatments at the end of storage than in the control (p<0.05). Therefore, astaxanthin can be used as a color enhancing agent for meat products as well as an natural antioxidant in replacing of BHT which is as synthetic antioxidant.