• Journal of Korean Institute of Industrial Engineers
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• v.36 no.3
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• pp.186-192
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• 2010

The present study classified the auto-parts makers into four groups according to their investment ownership. Four groups consist the one fully owned by Koreans, the one fully owned by foreigners, the one owned less than 100% but more than 50% by foreigners, lastly the one owned by less than or equal to 50% by foreigners. Among these, the auto-parts makers, 100% foreign ownership, have the highest Malmquist productivity index while 100% Korean-owned part-makers has the lowest productivity. In case of the 100% foreign ownership companies, the cause of Malmquist change, however, is attributed to the technical efficiency change. In particular, the pure technical change is the main source of the Malmquist change. This may indicate that the 100% foreign-owned companies have successfully transferred their production process technologies to the Korean plants. They are enjoying so called the "imitation-effect." 100% Korean-owned companies were not able to create the "imitationeffect" and therefore failed to close the gap with the foreign-owned companies in terms of the production efficiency. 100% Korean-owned auto-parts makers, however, outperformed the foreign-owned companies in the technological change. The outstanding technological change may indicate that Korean-owned part makers were able to narrow the gap with the foreign-owned companies in the area of engineering technological capabilities. The same results were also observed for 50% foreign-owned companies. Knowing that the core competence of the auto-parts makers lies on the engineering technological capabilities, the research found that the most desirable form of the foreign investment was 50% of foreign ownership.

• The Journal of Engineering Geology
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• v.25 no.4
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• pp.511-524
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• 2015

Groundwater causing subsidence in limestone mines is uncommon, and thus relatively poorly investigated. This case study investigated the cause and possibility of future subsidence through an evaluation of ground stability at the Samsung limestone mine, Chungcheongbuk-do. The ground near the mine area was evaluated as unstable due to rainfall permeation, and subsidence in the unmined area resulted from groundwater level drawdown. Future subsidence might occur through the diffusion of subsidence resulting from the small thickness of the mined rock roof, fracture rock joints, and poor ground conditions around the mine. In addition, the risk of additional subsidence by limestone sinkage in corrosion cavities, groundwater level drawdown due to artificial pumping, and rainfall permeation in the limestone zone necessitates reinforcements and other preventative measures.

• Applied Chemistry for Engineering
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• v.23 no.6
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• pp.567-571
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• 2012

The discoloration of traditional paintings could be induced by various chemical reactions of inorganic pigments due to temperature, humidity, light and air pollution. In this study, we made artificial samples including azurite and malachite as inorganic pigments using the traditional method on hanji called 'Korean paper'and investigated the artificial aging process occurred by the interaction between pigments and environmental factors. It was found that the azurite was influenced by the humidity of weathering tests and the salt fog of salt spray tests according to XRD and TGA results. However, it was shown that the malachite was chemically changed by the ultraviolet radiation of weathering tests and UV radiation tests according to color difference and TGA results.

• Journal of the Korea Safety Management & Science
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• v.24 no.4
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• pp.157-173
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• 2022

In South Korea, the history of the qualifications has been matured with industry development. Since National Technical Qualifications Act was enacted in 1973, the government makes an effort to develop the ability for improving socioeconomic status and the contribution of qualifications to industry. As the industry has been diversified and globalized, the government has efficiently and systematically operating the qualification by enacting Framework Act on Qualifications in 1997. And then, the qualifications are classified into national qualifications, private qualifications, and foreign qualifications. However, it is hard for national qualifications to abolish or establish a qualification by each organization and the privileged license acquisitors as the qualifications are separately operated by the laws and the organizations and lack consistency. For private qualifications, it is harder to organize even by the government because of the entry barriers by each qualification association. For those reasons, it is necessary to organize the system adapted in the changing job market and operated by the organization managing the qualification system with consistency. This research indicates the inefficiency of the qualification system because the work-study parallelism National qualification system, enacted in 2020, is like the qualification system in business in terms of the general operating system and the operator, except the institute and the law related. Therefore, we analyze the work-study parallelism National qualification system and the qualification system in business and suggest the efficient method to operate and the future research plan regarding the whole qualification system.

• Korean Journal of Clinical Laboratory Science
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• v.47 no.4
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• pp.251-258
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• 2015

Curcumin, a major polyphenolic compound of turmeric, is well known to prevent non-alcoholic steatohepatitis (NASH) related to obesity. The aim of the study was to investigate the effect of curcumin on hepatic fibrosis induced by carbon tetrachloride ($CCl_4$) in obese mice. $CCl_4$ was administrated in mice fed a normal diet (ND) or a high fat diet (HFD) for 7 weeks together with or without curcumin. It was conducted to examine for metabolic profiles, adipocyte size, and liver fibrosis by serum biochemistry, histology and immunohistochemistry. Also, Apoptosis of hepatic cells was determined by the TUNEL method. Treatment with curcumin significantly lowered the body weight, fasting glucose, serum AST and ALT, and decreased the adipocyte size, the number of macrophage and mast cells in adipose tissue, and collagen deposition in liver tissue in the HFD+$CCl_4$ group compared with the findings of the HFD+$CCl_4$ group. In contrast, treatment with curcumin on the ND+$CCl_4$ group did not show a significant difference except the body weight and mast cell number when compared with the ND+$CCl_4$ group. Furthermore, curcumin significantly reduced the number of parenchymal apoptotic cells, whereas it increased the number of non-parenchymal apoptotic cells, especially resembling an activated hepatic stellate cell in the liver. Taken together, this data suggests that curcumin might be an effective antifibrotic drug for the prevention of liver disease progression in obese mice. Thus, the development of curcumin as a therapy for obesity and liver fibrosis is supported.

• The Journal of the Korea Contents Association
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• v.17 no.11
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• pp.82-89
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• 2017

This paper intends to examine how North Korea has incited and persuaded its people by figuring out the structure regarding the meaning creation of its documentary film "Kim Jong-un, the Respected Comrade Supreme Commander, Giving On-site Guidance on the Grand Project of the People's Army" produced in 2015, which was North Korea's politically important year. The analysis results show that its narrative structure of the film took the form of an introduction, body, and conclusion to substantiate it obviously given theme. Its imaging techniques are geared towards uplifting the public's combat mentality and its sound contributes to achieving their adherence. In this regard, its film literature has the following meaning structure: first, the film takes the form of both film annals and the structure for the public to easily comprehend; second, the film clearly demonstrates its deep-rooted theme asking for the public to follow in the footsteps of the party's late father for its leadership; and third, the film also aims to establish the images of an always awake working leader by implanting and arranging the leader's diligence about his revolutionary activities in the documentary film. North Korea's documentary films serve as a weapon used for instigating revolution and construction. Given this, the producers of all documentary films have made sure to turn film literatures into the film literatures of the great leader. It was identified that under the social vision that the Kim Jong-un regime is a "socialist civilized country", he has tightened his grip on power in North Korea through the propaganda tool of film literatures.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.34 no.3
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• pp.261-269
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• 1989

Agricultural activities in Chejudo require more specialized weather services in this region. The meteorological information available from the Korea Meteorological Service (KMS) is limited in its areal coverage because the KMS stations are located along the narrow band of coastal area. topoclimatological technique which makes use of empirical relationships between the topography and the weather can be applied to produce reasonable estimates of the climatic variables such as air temperature and precipitation over remote land area where routine observations are rare. Presentation of these estimates in a from of fine-mesh grid map can also be helpful to upgrade the quality of weather services in this region. Altitude values of the 250 m grid points were read from a 1: 25000 topographic map and the mean altitude, the mean slope, and the aspect of the slope were determined for each 1 km$^2$ land area from these altitude data. Daily minimum air temperature data were collected from 18 points in Chejudo during the winter period from November 1987 to February 1988. The data were grouped into 3 sets based on synoptic pressure pattern. Departures from the KMS observations were regressed to the topographical variables to delineate empirical relationships between the local minimum temperature under specific pressure patterns and the site topography. The selected regression equations were used to calculate the daily minimum temperature for each 1 km$^2$ land area under the specific pressure patterns. The outputs were presented in a fine-mesh grid map with a 6-level contour capability.

• Korean Journal of Heritage: History & Science
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• v.52 no.3
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• pp.222-239
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• 2019

This paper studied Joseon royal incense, Buyonghyang, focusing on the case of Sunjo Sunwonwanghoo Garyedogam Uigwe. Incense was introduced to Korea in the period of the Three States with Buddhist cultures. Buyonghyang is an incense that represented the royal family and was used in various rituals. Civilians also burned this incense in front of a bride's palanquin at a wedding ceremony. Buyonghyang had various uses-ceremonial uses, as a fragrance, to mothproof, and medical uses. Buyonghyang is a combined incense with ten different ingredients. This study tracked the supply and demand of the incense ingredients through Takjijunjeol, Sejong Shilok Jiriji, and The Annals of the Joseon Dynasty. This paper identified properties of the ingredients and studied recipes using ancient medical books-Jejungshinpyeon, Donguibogam, etc. Then the cooperation and treatment of incense by craftsman were examined using the records of The Annals of the Joseon Dynasty, and Seungjeongwon Ilgi. The significance of Buyonghyang during the Joseon dynasty was studied by examining its use at a royal wedding ceremony. This study considered Sunjo's wedding ceremony based on Sunjo Sunwonwanghoo Garyedogam Uigwe which is highly regarded as a well-organized system compared to other Uigwe. Buronghyang was burned during all of the ceremonies which took place in the palace. Conversely, it is considered that Buyonghyang was burned only during the Bisuchekui ceremony (investiture), which took place in the bride's place, according to the record of the mobilization of court ladies for various incense burners for the Bisuchekui ceremony. Since the incense was able to be used only after Bisuchekui, it is considered that only the royal family could use the incense, and it was a symbolic incense of the Joseon Royal Family.

• The Korean Journal of Mycology
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• v.48 no.4
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• pp.381-388
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• 2020

Bioluminescence refers to the production and emission of light in living organisms. This phenomenon arises from luciferase-catalyzed oxidation reaction of luciferin. Bioluminescence is widely observed in marine vertebrates and invertebrates, as well as in some microorganisms and fungi. To date, approximately 80 species of fungi have been reported to be luminous. One such example is Omphalotus japonicus, which is a luminous fungus found in Korea. In this study, we examined the bioluminescence of Omphalotus japonicus mycelia. Light emission was detected at the edges of mycelia grown on solid agar medium. Notably, the intensity of bioluminescence was found to be significantly enhanced following wound induction. The increase in light intensity peaked at 3 h after mechanical damage. We also investigated the effects of extreme temperatures on bioluminescence. Unlike mechanical damage, high and low temperatures repressed the light emission from mycelia. Further investigations are required to reveal the physiological and ecological properties of fungal bioluminescent responses to environmental stresses.

• Journal of the Korean Society of Food Science and Nutrition
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• v.4 no.1
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• pp.13-17
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• 1975

1. A nursery school principal must think over physical stamina and health of his children, and he must make an epoch making changes to nutrition control. I think that authorities concerned must give weight to quality before quantity to manage the nursery school. If the nursery school principal who has aid received from abroad and his native country must manage the nursery school rationally. It is expected that, though the nutrition level is below the level of sports middle school children, it is above the common level of home children. 2. I fear that the calories which the pupils of sports middle school assimilate a day on the average is apt to be more calories as compared with other pupils of their age(weight). This is also true for their level of activity. It is required that the nutritionist must recheck the quantity of the calorie provision. 3. I took no thought about infection with parasites in this thesis. It is because that the pupils of sports middle school have much Hb (hemoglobin), because they have had meals with a settled menu for a year or two. So, that it is expected that it is caused only by the nutritious foods regardless of parasites and that they have little Hb(hemoglobin). Besides though they are little pupils, because they have much Hb. Of taking the level with upper life classes of the the Ewha Girls University students, it will be more reliable. Therefore as we maintain the states of health of the common home children and nursery school children normally, to increase the national power, the managers of nursery schools or the heads of families must pay attention to the control of nutrition, and authorities concerned must pay attention to the control of nutrition, and authorities concerned must take the trouble much more to the management of nursery school.1. We have been undertaking the occupations of the family plannings for more ten years. But we have still failed to realize the anticipated result in the farm villages. Though it is not in this district, I think that we must make efforts in these occupations urgently, and control increases in population, decrease the consumptions of food and salt, and contribute to the increasing of the general income. 2. There is a tendency to take a little more salted foods in the cities than in the farm villages. But we are apt to take more salt in quantity(20g) to be taken in a day both in the cities and in the farm villages than it is necessary to us. So it is required that we must grope for a means of increasing of the general income as early as possible, and that we must improve our diet to be got rid of dietary life in importance. And so we have to study throughly the side effect caused due to too much salt to be taken in, if it is discovered, we must spour on a means of sweep of it.