• Journal of the Korean Society for Marine Environment & Energy
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• v.8 no.3
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• pp.148-157
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• 2005

In order to understand distribution characteristics and pollution of heavy metals in the artificial Lake Shihwa in the vicinity of Kyunggi Bay in relation with huge environmental changes, various environmental samples including seawaters, surface sediments and settling particulate matters were collected from Lake Shihwa in 2004. Due to extreme pollutant discharge from various anthropogenic sources such as the Banweol and Shihwa Industrial Complexes and cities, the highest metal concentrations in the samples such as waters, sediments and settling particulate matter were found in inner part of the lake. High metal contents (Cu, Zn and Hg) in sediments were observed at Sts. 2-4 and 9. The contents of Cr, Co, Ni, Cu, Zn and Pb in SPMs were high at St. 5 and low in the outer part of the lake. Spatial distribution of heavy metals were mainly controlled various biogeochemical factors and physical mixing as well as input of industrial and municipal wastewaters. Although tile environmental qualities of heavy metals in the lake have been improved partially due to inflow of outer seawater, it is not clear to reach a good environmental quality. Therefore, further environmental programs should be conducted continuously for environmental improvement.

• Journal of the Korean Professional Engineers Association
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• v.12 no.1
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• pp.12-20
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• 1979

The early history of gun powder (black powder) and explosives was closely connected with the discovery of methods of preparing and purifing salpetre (potassium nitrate KNO$_3$). The Chineses apparently became acquainted with salpetre firstly on about 11th century, and they were possibly the original discoverers of salpetre for raw material of gun powder. The Egyptians called it “Chinese snow”, and it is significant that Chingis-Khan, the Mongol conqueror, took the Chinese eenginees with him in 1218 to use it for attacking the fortifications of the Persian cities. The black powder was invented by chance by Chinese alchemists during the Song dynasty (11th century) in the process of manufacturing medicine, and the powder was introduced to Europe by Mongol army. The manufacturing method of salpetre and gun powder was introduced to Korea from China in 1374, and the powder alld gunnery manufacturing project was developed by Mu Sun Choe(崔茂宣), the first Korean engineer late in Koryo dynasty. Coming in to Yi dynasty the explosive technic, extractive method of salpetre, and gunnery manufacturing process were developed greatly by Mu Sun Choe and Hai Sin Choe (崔海臣). However, confronting with the Japanes invasion at Imjin War (1597) with more powerful western style rifles which had been introduced from the Portuguese, on the contrary Korean army with the traditional guns couldn't compete with them. The Chochong(烏銃, the western rifle introduced in Japane) were much superior to the Chinese style traditional guns in the shooting power and striking efficiency. On the other hand, the Japanese battle ships armed only with the Chochong, when confronted with the Korean turtle shaped ships under the commanding of Admiral Yi Sun-Sin(李舞臣), were defeated by the Korean canons on the ships. The technical development of the modern powder industry in Korea. with the construction of four big explosive plants from 1930 to 1945, has resulted the mass-production of explosives. This study was purposed to investigate to the process with regard to the details of introduction to the explosive technology in Korea, and intended to give a help to the engineers who are engaged in study of the explosive technics by means of giving a spot light data on the early process of the designs, and making suggestion to the researchers for further study and invent a new and modern explosive.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.202-209
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• 2017

South Korea is becoming an aging society, increasing the population with dementia. This study analyzed the characteristics of the trend of dementia patients by utilizing 12 years' worth of data from five V hospitals within metropolitan cities. The results show that there has been an 11.3 times increase in the total number of new dementia patients in these five hospitals from 410 in 2003 to 5,048 in 2014; and among them, the rate of increase was highest in P hospital with a 30.3 times increase. Conversely, there has been a 6-times increase in D hospital, illustrating a noticeable gap between these hospitals. Overall, these hospitals have shown an enormous increasing ratio. In an analysis according to age, it's been shown that those aged between 75 and 84 showed the highest prevalence, and most patients, approximately 93.5%, were 65 years or older, while 20.2% were 85 years or older, showing a high ratio of elderly among dementia patients. In an analysis by type of dementia, it's been shown that Alzheimer's was the most prevalent with 44.4%, followed by unspecified dementia with 33.3%, and vascular dementia with 20.4%. As evident by the outcome of the study, there's been a drastic increase in the number of dementia patients in the past 12 years; since the prevalence of dementia was shown to be higher with older age, it is expected that the number of dementia patients will rise further in these five hospitals, where there's a high ratio of elderly patients. More elaborate and continuous plans are necessary for the management of dementia patients following the growing number of dementia patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.618-624
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• 2017

In Seoul and most metropolitan cities, urban trains are delayed due to high congestion during commute times. The delay effect of passengers boarding and disembarking is also significant. In this study, a wide passenger door system was developed as a way to improve the scheduled speed of urban trains by decreasing the passengers' flow time. The door size was defined experimentally to shorten the entrance time. The optimum door size was also determined to improve the stop precision performance of the train while considering the interference effect with peripheral devices. Because the change in door size changes the structural characteristics of the vehicle, the structural stability of a train was analyzed numerically. A prototype of the wide door system was made, and the proposed design was verified using functional and endurance tests. The systematic development process can be used as design data for door size definition and system production when applying a wide door to improve the scheduled speed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.205-214
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• 2020

This study was undertaken to identify the impact of bad customer behavior, job burnout, and positive psychological capital, on the job embeddedness of nurses. Data was collected from July 1 to July 31, 2019 using a structured questionnaire, enrolling 198 nurses working at three general hospitals located in 2 metropolitan cities. Data were analyzed by applying t-test, ANOVA, Scheffe' test, Pearson's correlation coefficients, and multiple regression, using the SPSS/WIN 21.0 program. Our results indicate that bad customer behavior significantly correlates with job burnout (r=0.24, p=<0.001), positive psychological capital (r=-0.37, p=<0.001), and job embeddedness (r=-0.48, p=<0.001). Moreover, job burnout had a positive impact on psychological capital (r=-0.44, p=<0.001) and job embeddedness (r=-0.31, p=<0.001), whereas positive psychological capital impacted job embeddedness (r=0.49, p=<0.001). Multiple regression analysis revealed that bad customer behavior (β=-0.34, p<0.001), positive psychological capital (β=0.32, p=0.004), and position (β=-0.19, p=0.001) had maximum influence (38%) on the level of job embeddedness experienced by nurses. Taken together, results of this study indicate that in order to increase the level of job embeddedness of nurses, it is necessary to develop strategies that eradicate and manage bad customer behavior, and also develop programs that strengthen and develop positive psychological capital.

• The Journal of the Korea Contents Association
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• v.5 no.3
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• pp.103-111
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• 2005

By international lighting market's growth and domestic landscape lighting market's growth, the latest lighting market is activated. But, They are doing price competition that domestic lighting technology and development technology of lighting fixtures design do not possess international competitiveness than these change. Specially, as image of area and the country can be influenced greatly by cityscape at present visual point that many interests are converged country and identity establishment of local government, many cities are using force hereupon. Constructs which cityscape is various including natural ecology area of life environment gather and are done Image creation and this people's consciousness and culture living soon inside thing which do speaking by proxy be. Than city's night view nature lighting more than by spectacle lighting along with life lighting to basis materialize can. It is meaning more than thing that fine view of city becomes beautiful simply that night view of city becomes superior, that means that city efficiency and quality of life are exalted by a word. Wish to establish effective lighting technology and new product design process through PLS lighting technical development and 300 W lighting fixtures design development hereupon, and raise domestic spectacle lighting market's localization and domestic lighting market's competitive power furthermore.

• Journal of Distribution Science
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• v.12 no.2
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• pp.95-103
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• 2014

Purpose - Korea has a better geographical location than other nations in the Northeast Asian region. This means that Korea has an opportunity to become the center of international physical distribution in Northeast Asia. Korea should take advantage of this opportunity by exploring appropriate strategies to achieve this goal, assuming government willingness, with a view to capitalizing on the geographical advantage of the Korean peninsula and constructing a comprehensive physical distribution network system. If we prepare for this scenario, Korea could become the center of international physical distribution in Northeast Asia. Research design, data, and methodology - This study has the purpose of determining how shipping companies form partnerships with third-party logistics providers, and the relevant implications. The survey methods used were personal interview and a questionnaire distributed through e-mail, fax, mail, and telephone. A total of 600 questionnaires were distributed, out of which 285 were returned. Of the collected questionnaires, 10 were excluded because of insufficient content, leaving 275 to be used in the study as available valid samples. The data that was collected from these samples was analyzed using the data coating process and by employing a statistical package program. Results - Flexible policies, administration, and systems will be needed to create better business practices. In this dissertation, first and foremost, the results reveal that in order to become the center of Northeast Asian logistics, Korea must transition into a new paradigm based on the current economic and social systems that have stemmed from bureaucracy, inflexibility, chauvinism, and egalitarianism. Flexible policies, administration, and systems will be required to create better business practices. Domestic logistics corporations need to occupy a strategic logistics hub, create a logistics network, and activate value-added logistics business strategies by ensuring significant manpower and by building a logistics information system to strengthen their competitive edge, creating an improved system. Conclusions - In this dissertation, first and foremost, we point out that in order to become a center of North East Logistics, Korea should change to a new paradigm from the old one based on current economic and social systems that have stemmed from bureaucracy, inflexibility, chauvinism, and egalitarianism. More reasonable business laws, systems, and policies based on market-driven flexibility and transparency should be created. Moreover, social norms and rules should be reasonably established, to accomplish political and social security. Korea has to cultivate a culture of tolerance for foreign companies. This involves a change of paradigm for the development of the capital city and satellite cities. It will take a powerful task force or organization to plan and execute the vision that aims to meet these needs, accomplish the necessary goals, use the appropriate system effectively, and make Korea a key country in the field of Northeast Asian logistics.

• Journal of Distribution Science
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• v.12 no.2
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• pp.7-16
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• 2014

Purpose - The purpose of this study is to target Chinese consumers of Korean agri-food through the analysis of agri-food brand identity images to set future directions for proposed agri-food exports to China. Since negotiations began for a free trade agreement (FTA) between Korea and China, some Koreans have worried about the Korean agriculture sector. The world trading system has undergone many changes in recent years. Since the start of FTA negotiations on agriculture, China and Korea have faced a heightened sense of crisis. China is trying to export agricultural products so actively that its agricultural exports could increase by more than 7% annually. China exported about one-tenth of its agricultural products to Korea in the period 2002-2010. Recently, the importance of brand identity has tended to increase, as the world becomes one unified market. In this situation, we should try to promote agri-food exports to China. It is very important to understand consumers' recognition of Korean food and the image of the Korean agri-food industry, to establish an export strategy. Research design, data, and methodology - This study targeted 2,800 adult men and women aged 25-59 years living in four major cities in China (Beijing, Shanghai, Guangzhou, and Qingdao) with a household income within the top 10% level in the China, using the one-to-one interview survey method. In addition, four groups by region (eight people per group) for a total of 32 groups were surveyed by using the focus group interview (FGI) research method, and impressions of imported agri-food were surveyed using 17 questions about fresh agri-food and 22 questions on processed agri-food. Factor analysis, brand positioning, biplot analysis, and so on, were carried out based on the results of these surveys. This research presents the brand identity of Korean food; according to the analyses, the brand identity is based on trust, safety, and attractiveness. Result - Factor analysis results showed that Chinese consumers expect four major qualities in imported fresh agri-food: freshness/safety, attractive appearance, premium branding, and excellent taste/quality. In the case of processed agri-food, it turned out that Chinese consumers are focused on safety/hygiene/freshness, health, and taste. In addition, in the fresh agri-food analysis by country, American foods had the upper hand; the image of American foods was also recognized as the most positive for processed agri-food. Meanwhile, according to the biplot analysis, Korean agri-food is strongly preferred for its appearance, but no country is strongly preferred as regards the level of freshness/safety that is expected by Chinese consumers. Conclusions - In this study, we analyzed the image of imported agri-food expected by Chinese consumers by reconstructing agri-food characteristics from the brand perspective. The research result shows that a Korean brand identity must be the ultimate goal for activities undertaken to enhance the image of Korean agri-food in the future. Additional research is needed because brand image can be formed through various channels.

• The Journal of the Korea Contents Association
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• v.16 no.5
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• pp.760-771
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• 2016

The purpose of this study was to examine whether social support produced any mediating effects when needy single mothers' sense of social exclusion affected their own will to escape poverty. The subjects in this study were 376 poor single mothers who resided in the cities of Busan, Gimhae and Yangsan and who were in their 20s to 60s. The findings of the study were as follows: First, the single mothers who lived in poverty were given less social support when they felt more excluded in the dimensions of health, relationships, production, consumption, political participation and housing. Second, the needy single mothers had a more will to escape poverty when more social support was provided and less will to escape poverty when they felt more excluded in the dimensions of health, relationships, production, consumption, political participation and housing. Third, social support produced mediating effects when social exclusion affected the will to escape poverty. The findings of the study suggest that in order to relieve needy single mothers' sense of social exclusion and bolster their will to escape poverty, formal social support from the nation and local community and informal social support from neighbors, friends and relatives should both be strengthened.

• Journal of Nutrition and Health
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• v.34 no.2
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• pp.222-229
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• 2001

This study describes the application of the stages of change construct to fat intake by examining the associations of the stages of change with nutritional status and beliefs on health behavior. Data were obtained from apparently healthy 596 adults(326 females and 270 males) residing in large cities. Stages of change assessed by an algorithms based on 6 items were designed each subject into one of the 5 stages: precontemplation(PC), contemplation(CO), preparation(PR), action(AC) and maintenance(MA). Beliefs on health behavior were assessed by self efficacy as well as 4 belief scales from the Locus of Illness Control(LIC) developed using factor analysis such as internal disease cure and prevention and external disease cure and prevention. Energy and fat intakes were measured by a 39 item short form food frequency questionnaire. Regarding the 5 stages of change, MA stage comprised the largest group(37.9%), followed by Ac(30.7%), PC(11.4%), CO(10.4%) and PR(9.6%). Subjects who were females, older or healthier were more likely to belong to either AC or MA. Stage assignment of individuals was corroborated by their nutritional variables. Those in PC had the most energy and fat and those in MA ate the least for females. BMI was higher in PR than any other stages for both males and females. Those in PC were distinctive in that they were more externally oriented in terms of health control showing higher scores on external disease prevention(for males) and external disease cure(for females), and lower score on internal disease cure. On the other hand, those in MA received the highest scores on internal disease prevention and self efficacy, which suggested that they were more internally oriented. Canonical discriminant function analysis indicated that the 5 stages were importantly discriminated by BMI, self efficacy, internal disease prevention and external disease prevention for males and by fat intake, self efficacy and external disease cure variables for females. The results of our study confirm differences in stages of change in fat intake in terms of nutritional status and beliefs on heath behavior and indicate the need for taking these phases of change into account in nutrition advice. (Korean J Nutrition 34(2) : 222-229, 2001)