• Journal of the Korean Institute of Landscape Architecture
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• v.43 no.5
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• pp.121-131
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• 2015

Village-concentrated agricultural regional development projects that aim for increased profits are now being aimed at core agricultural and fishing areas. These agricultural and fishing stimulus projects aim to not only increase the net profit of local citizens but also improve their living conditions. As the industry itself has changed, local rural areas have also changed in various ways. One such aspect is the emergence of rural-urban complexes known as "rurban" areas. These naturally occurring rurban regions are created by a combination of complex urban infrastructure while maintaining the insulated rural communities that agricultural areas are usually so readily identified by. "Jeongeupsi Naejangsnagdong", the target of this research, also specifies the unaltered surrounding natural environment of rural areas while at the same time containing complex central living areas typically found in urban areas. This research suggests that the direction of residents' participation in community-level rurban projects could solve the problems found in existing top-down government development projects. This research also suggests rurban area activation plans to improve living conditions through analysis of both local rurban agricultural characteristics and citizen demands. In order to encourage citizen autonomy and self-governing attitudes, citizen-strengthening workshop programs are proposed, such as citizen workshops or pilot activities. This research was carried out by target area analysis, rudimentary planning, development direction setting, detailed project planning, and finally project processing. This procedure established three goals, which are walking environment improvement, community infrastructure establishment, and good living environment establishments, based on actual site research and citizen demands. This research suggests plans to activate community groups that were already established and reflect citizen needs as the main avenues for local businesses. This research is predicted to promote more active and successful growth through autonomy in stimulating these increasingly emerging rurban agricultural regions.

• Korean journal of food and cookery science
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• v.22 no.4 s.94
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• pp.535-544
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• 2006

Kimchi is well Down for its taste and health function. However, recently Kimchi consumption has been falling because of its salty taste, spice flavor and pungency. This study was aimed to prepare a less salty and more mildly flavored Kimchi with the addition of tomato which contains a red color similar to that of the hot pepper used in traditional kimchi preparation has functionality. The pH, total acidity, color, texture, microbes, sugar, salt, Na and K content of the tomato kimchi were measured. The total amount of phenolic compounds of the tomato kimchi was five times higher than that of traditional kimchi without tomato. A sensory evaluation of the tomato kimchi demonstrated its higher acceptability in overall color, fresh flavor and hot taste but no difference in acidity compared to the traditional kimchi.

• Journal of dental hygiene science
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• v.17 no.6
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• pp.463-471
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• 2017

The purpose of this study was to examine the causes of career interruptions among dental hygienists, institutional measures required for their long service and ways of creating a stable employment culture for them in determine how to resolve labor shortage, create stable jobs, and step up the reemployment of idle manpower. In addition, the following suggestions are made for the establishment of a stable employment culture for dental hygienists by analyzing related literature, research materials, and information such as forums for establishing appropriate jobs for female dental workers. First, a system should be set up to prevent career interruption among dental hygienists. The work environment should be improved to prevent career breaks, and the wages, working hours, and working style should be efficiently structured to maintain the tenure of employees. Second, a plan should be devised to make use of idle manpower, and a variety of necessary programs should be developed. With respect to regular working hours, the time conversion system should be used, which reduces the amount of time one would want to work while receiving a national subsidy. Third, dental hygienists working in different occupations for marriage, childbirth, childcare, school and personal hygiene should make a way to return to the dental system immediately when they want. Fourth, the government should take institutional measures and offer down-to-earth support and benefits for women consideration their social characteristics to guarantee a balance between work and childcare.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.439-450
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• 2015

This study objects to find characteristics in chemical tanker markets and to determine optimal chemical tanker size using a total shipping cost in main trading route of asia chemical tankers .Precedent studies of determination of the optimal ship size and case studies about chemical tankers was carried out and tried to introduce a cost model which is applicable to chemical tanker. This study is dependant on numerical analysis and involves scenario analysis to minimize sensitivity of results. This analysis shows as follows. First, 12,000DWT tanker is an optimal size on the 'Far East-Middle East' services, 9,000DWT tanker is a most competitive on the 'Far East-South East Asia' services and 3,000DWT tanker is a most economic size on the 'Inner Far East' services at average market situation. Second, the bigger size of chemical tanker, the more competitive advantage the tanker will obtain when bunker fuel prices rise. Small size ship gets more competitive during bunker prices down. Third, market fluctuation of time charter rate for chemical tanker is less than 20% against its average time charter hire which means less volatile. And tanker's competitiveness per each size is remained mostly same when time charterer rates rise at same proportion. Fourth, bigger size chemical tankers have cost advantages when tanker's quantity of each part cargo increase. And small-sized tanks are more competitive when part cargo scales decrease. For the last, ship's port stay strongly influences on the determination of the optical tanker size. When vessel has shorter port stay, bigger-sized tanker will be more competitive and even can be competitive if applies in short voyage as well.

• Journal of Korea Water Resources Association
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• v.45 no.3
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• pp.301-316
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• 2012

Two models, TANK and SWAT (Soil and Water Assessment Tool) were compared for simulating natural flows in the Paldang Dam upstream areas of the Han River basin in order to understand the limitations of TANK and to review the applicability and capability of SWAT. For comparison, simulation results from the previous research work were used. In the results for the calibrated watersheds (Chungju Dam and Soyanggang Dam), two models provided promising results for forecasting of daily flows with the Nash-Sutcliffe model efficiency of around 0.8. TANK simulated observations during some peak flood seasons better than SWAT, while it showed poor results during dry seasons, especially its simulations did not fall down under a certain value. It can be explained that TANK was calibrated for relatively larger flows than smaller ones. SWAT results showed a relatively good agreement with observed flows except some flood flows, and simulated inflows at the Paldang Dam considering discharges from upper dams coincided with observations with the model efficiency of around 0.9. This accounts for SWAT applicability with higher accuracy in predicting natural flows without dam operation or artificial water uses, and in assessing flow variations before and after dam development. Also, two model results were compared for other watersheds such as Pyeongchang-A, Dalcheon-B, Seomgang-B, Inbuk-A, Hangang-D, and Hongcheon-A to which calibrated TANK parameters were applied. The results were similar to the case of calibrated watersheds, that TANK simulated poor smaller flows except some flood flows and had same problem of keeping on over a certain value in dry seasons. This indicates that TANK application may have fatal uncertainties in estimating low flows used as an important index in water resources planning and management. Therefore, in order to reflect actually complex and complicated physical characteristics of Korean watersheds, and to manage efficiently water resources according to the land use and water use changes with urbanization or climate change in the future, it is necessary to utilize a physically based watershed model like SWAT rather than an existing conceptual lumped model like TANK.

• Journal of Bio-Environment Control
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• v.21 no.1
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• pp.1-11
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• 2012

The objective of the present study is to provide data needed to find double covering method to be able to improve environment of temperature, humidity and PPF in tomato greenhouse. The distribution charts of temperature, humidity and PPF which were measured in environment control conditions such as thermal insulation, air heating, roof ventilation and air fog cooling in conventional and air inflated double layers greenhouses were drawn and analysed. The thermal insulation effect of the air inflated greenhouse was the same as that of conventional greenhouse because the temperature between insulation curtain and roof covering material was equal in heating season. The ventilation effect of the air inflated greenhouse was superior to the conventional greenhouse. The temperature distribution in the fog cooled greenhouse was uniform and the cooling effect was about $3.5^{\circ}C$. The condensation on the roof covering surface could be controlled by removing the moisture between insulation curtain and roof covering by using humidifier. The PPF of conventional greenhouse was more decreased than the air inflated greenhouse as time went by because the transmittance of conventional greenhouse declined by dust collected on the inside plastic film owing to rolling up and down operation for ventilation.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.50 no.spc1
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• pp.19-23
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• 2005

This study was carried out to compare the rice quality between domestic brand rice and imported Chinese rice. In the appearance of grain, head rice rates were $96.1\%$ in domestic brand rice (Ilpumbyeo), $94.1\%$ in Jingguan (Chinese brand rice) and $86.5\%$ in Xiaozhandao(Chinese brand rice). In case of Chinese parboiled rice, the head rice rate was $0\%$ because the cracked and broken rice occupied about $95.5\%$. The low protein contents in Ilpumbyeo and Xiaozhandao as 6.5 and $6.7\%$ show relatively high palatability as 81.9 and 71.4. However, high protein contents in Jingguan and Chinese parboiled rice as 7.5, $7.4\%$ show low palatability as 64.3 and 55.6. In viscosity characteristics, peak viscosity, break down and final viscosity were higher in Ilpumbyeo and Xiaozhandao, midium in Jingguan and lowest in Chinese parboiled rice. And the set back value, which was negatively related with amylose content, was lowest in Ilpumbyeo and highest in Chinese parboiled, suggesting slow deterioration in Ilpumbyeo and rapid deterioration in Chinese parboiled rice. Overall physical components of cooked rice measured by Texture Analyser were higher in Ilpumbyeo than those in Chinese parboiled rice.

• Journal of Korean Society of Forest Science
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• v.47 no.1
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• pp.52-61
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• 1980

This study is carried out to learn the properties of forest soils in Korea and propose the reasonable management methods of forest land. Among 178 soil series surveyed until now in Korea forest soils include 64 series broken down according to the weathered products into 5 categories such as residual materials on mountain and hill, residual materials on rolling and hill, colluvial materials on local valley and fans, alluvial materials and volcanic ash soils. What discussed in this paper are classification system, parent rocks, texture class and drainage conditions of Korean forest soils. The characteristics of Korean forest soil properties classified in U.S.D.A. soil classification system are as follows: 1. Residual soils on mountain and hill (29 soil series) are almost Lithosols without any distinct soil profile development. They have loamy skeletal (11 series), coarse loamy (5 series), fine loamy (3 series), and fine clayey soils (3 series). Their drainage conditions are somewhat excessively drained in 16 series and well drained in 7 series. 2. Residual soils on rolling and hill (19 series) are Red-Yellow Podzolic soils with well developed soil profiles. They have coarse and fine loamy texture in 12 series and fine clayey texture in 5 series mostly with well drained condition. 3. Colluvial soils on local valley and fans (13 series) include mostly Regosols and some Red-Yellow Podzolic Soils and Acid Brown Forest Soils. They have loamy skeletal (4 series), coarse loamy (3 series), fine loamy (3 series), and fine clayey soils (2 series) with well drained condition. 4. Soil textures of weathered products of parent rocks are as follows: 1) Parent rocks producing coarse texture soils are rhyolite, granite gneiss, schist, shale, sandstone, siltstone, and conglomerate. 2) Parent rocks producing fine and heavy texture soils are limestone, basalt, gabbro, and andesite porphyry. 3) Granite is a parent rock producing various textured soils.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.1
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• pp.278-283
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• 2019

3 kinds of fine powder, Fe-2%Ni alloy powder(N Ltd.) and Fe+2%Ni mixed powder(B Ltd. and S Ltd.), were fabricated into sintered compacts of bending strength specimens and ring type specimens by metal injection molding, debinding and controlling sintering conditions (reduction and sintering atmospheres, sintering temperature, sintering time and cooling rates). Density and magnetic properties of the sintered compacts were evaluated with the following conclusions. (1) When each compact was hold at 1123K for 3.6ks in H2 and sintered at 1623K for 14.4ks in Ar, the density of N, B and S Ltd.'s sintered compacts were measured as 96, 99 and 99%, and oxygen/carbon contents were measured as 0.0041%O/0.0006%C, 0.0027%O/0.0022%C, and 0.160%O/0.0026%C, respectively. (2) Magnetic characteristics of B Ltd. compact in Ar with the best results showed $B_{25}=14.3KG$, $B_r=7.75KG$, and $H_c=2.1Oe$, but not enough as those made by melting process. (3) Magnetic properties of B Ltd. compact which were sintered at 1673K for 14.4ks in Ar gas, and cooled at $0.83Ks^{-1}$ to 1123K and then cooled at $0.083Ks^{-1}$ down to room temperature were measured as $B_{25}=14.8KG$, $B_r=8.3KG$, and $H_c=1.3Oe$, almost similar to those made by melting process. Objected soft magnetic materials properties were obtained through sintering process by controlling sintering conditions (reduction condition, sintering atmosphere, sintering temperature and sintering time) and cooling rates.

• The Journal of Korean Society for School & Community Health Education
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• v.13 no.3
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• pp.57-71
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• 2012

Objectives: This study examines the situation regarding smoking among high school students in Seoul Province and identifies smoking-related factors. Methods: The study sample consisted of 1,000 high school second-grade students from 6 high schools in Seoul. The PRECEDE model was used to assess the students' needs. We carried out an educational diagnosis on attitudes, outcome expectations and social norms. Date were collected from June. 7 to 21, 2011, and were analyzed using SPSS-15.0 according to the study objectives. Results: Of 906 respondents, 9.4% had experiences to smoking: 12.7% were male and 5.7% were female. Smoking-related factors from among general characteristics were statistically significant depending on the degree of gender($x^2$=14.515, p=.001), school performance($x^2$=40.289, p=.001) and friends 'smoking status($x^2$=88.615, p=.001). Factors concerning attitudes toward smoking were statistically significant depending on the students' perceptions as follows: 'Smoking is fun(t=-14.801, p=.000)', 'Smoking looks cool(t=-10.349, p=.000)', 'People who smoke have more friends(t=-11.295, p=.000)', 'Smoking helps me manage stress(t=-15.059, p=.000)' and 'Smoking is not harmful to the body if you exercise(t=-6.388, p=.000)'. Factors concerning outcome expectations were statistically significant depending on their perceptions as follows: 'Tobacco smells good(t=-8.939, p=.000)' and 'Smoking helps in weight management (t=-7.304, p=.000)'. Factors concerning social norms were statistically significant depending on the following perception: 'My friends will not like it if I smoke(t=4.605, p=.000)'. The following influence high school students attitudes toward smoking: School performance (OR=11.66, 95%CI=1.67~81.37; OR=18.27, 95%CI=2.58~129.24; OR=26.74, 95%CI=3.06~233.79), Friends smoking status(OR=80.05, 95%CI=6.94~922.77), 'Smoking is fun(OR=12.90, 95%CI=3.87~43.04; OR=63.41, 95%CI=10.66~377.09)', 'Smoking looks cool(OR=0.15, 95%CI=0.03~0.64)', 'Smoking is not harmful to the body if you exercise(OR=1.44, 95%CI=0.03~0.62)', 'When there is no work to do, smoking is a good way to pass the time(OR=21.68, 95%CI=4.27~109.90)', 'When you are angry, smoking calms you down.(OR=13.39, 95%CI=3.92~45.65; OR=8.69, 95%CI=1.67~45.13)' and 'My parents consider it important that I do not smoke(OR=10.05, 95%CI=1.00~100.43)'. Conclusions: The study suggests that effective ways to discourage of high school students from smoking are changing their attitudes toward smoking, reducing the motivation to smoke, and controlling the number of cigarettes. Therefore, aiming at preventive education. Schools must provide accurate information about the effects of smoking. Thus, health education should actively involve preventive education not only in schools but also at home, the societal and national levels. Cooperation between various sectors of society is required for this.