• Journal of Astronomy and Space Sciences
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• v.29 no.4
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• pp.381-387
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• 2012

The planetary exploration rover executes various missions after moving to the target point in an unknown environment in the shortest distance. Such missions include the researches for geological and climatic conditions as well as the existence of water or living creatures. If there is any obstacle on the way, it is detected by such sensors as ultrasonic sensor, infrared light sensor, stereo vision, and laser ranger finder. After the obtained data is transferred to the main controller of the rover, decisions can be made to either overcome or avoid the obstacle on the way based on the operating algorithm of the rover. All the planetary exploration rovers which have been developed until now receive the information of the height or width of the obstacle from such sensors before analyzing it in order to find out whether it is possible to overcome the obstacle or not. If it is decided to be better to overcome the obstacle in terms of the operating safety and the electric consumption of the rover, it is generally made to overcome it. Therefore, for the purpose of carrying out the planetary exploration task, it is necessary to design the proper suspension system of the rover which enables it to safely overcome any obstacle on the way on the surface in any unknown environment. This study focuses on the design of the new double 4-bar linkage type of suspension system applied to the Korea Aerospace Research Institute rover (a tentatively name) that is currently in the process of development by our institute in order to develop the planetary exploration rover which absolutely requires the capacity of overcoming any obstacle. Throughout this study, the negative moment which harms the capacity of the rover for overcoming an obstacle was induced through the dynamical modeling process for the rocker-bogie applied to the Mars exploration rover of the US and the improved version of rocker-bogie as well as the suggested double 4-bar linkage type of suspension system. Also, based on the height of the obstacle, a simulation was carried out for the negative moment of the suspension system before the excellence of the suspension system suggested through the comparison of responding characteristics was proved.

• Korean Journal of Environmental Biology
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• v.38 no.1
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• pp.189-196
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• 2020

Mosquitos serve as vectors for diseases, causing inconvenience as well as a threat to human life and health. Concern about mosquitos introducing and spreading new diseases has been intensifying. We observed a variety of mosquito habitats based on land cover classification from Korea's Ministry of Environment, and the mosquito species that could appear were classified according to the each habitat type. Finally, we suggested the best control methods for each type of habitat considering habitat characteristics and the ecological traits of mosquitos. Urban areas harbor various habitats for pests, contributing significantly to mosquito habitats. Control must be performed regarding larva and adults because various sources for habitats exist. Public mosquito control programs such as educational training, as well as information brochures can be effective in managing mosquito populations and public health. Agricultural areas show high densities of mosquito larva to lentic zones such as reservoirs, wetlands, paddy fields. So, biological control using natural predators may be effective in controlling mosquito populations. Forests are major habitats for Aedes albopctus, so physical controls should be deployed for residents living nearby, and excessive deforestation should be minimized. Other areas including aquatic ecosystems should be adopted regarding biological control using Bti (Bacillus thuringiensis var. israelensis) and chemical control for eradicating mosquitos. We classified habitats into four types of land cover patterns considering ecological traits and habitat preference, and suggest adequate control methods for each habitat type. Our suggestion can be used to positively contribute toward effective managing mosquito's density and reducing the damage to public health.

• Journal of Society of Preventive Korean Medicine
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• v.13 no.1
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• pp.117-130
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• 2009

This study was attempted to suggest fundamental data to take health care plan in terms of oriental medicine by evaluating the health-related quality of life according to the Sasang constitutional medicine (SCM) of factory workers. General characteristics, living habits, and health-related quality of life were investigated through self-administration questionnaire in the course of oriental health examination for 1,870 male workers at a manufacturing company located in the Jeollabuk-do region, and the Sasang constitution of each worker was identified and analyzed through questionnaires and oriental doctor's medical examination. For Sasang constitutional medicine, So-eum person(少陰人) was found to be the most, and then So-yang preson(少陽人), Tai-eum preson(太陰人), and Tai-yang preson(太陽人) in order; for lifestyle, smokers were most found in So-yang person workers, non-smokers in Tai-yang person workers, drinkers in Tai-yang person workers, and non-drinkers in So-eum person workers. For the general health score by the Sasang constitutions, Tai-yang person workers were found to be 42.73 in general health area, Tai-eum preson workers 41.69, So-yang person workers 40.87, and So-eum person workers 40.42; in the vitality area, Tai-eum person workers were found to be 45.14, So-yang person workers 44.16, So-eum person workers 43.02, and Tai-yang person workers 41.34. Specially, it was found that regular exercise improved physical health factors, drinking adversely affected mental health factors, and the mental health factors of Tai-eum person workers who have regularly exercised showed the highest values, while those of Tai-yang person workers who have not exercised showed the lowest values. There was difference in lifestyle by Sasang constitutions, and accordingly, the quality of life might be different Therefore it is deemed that health care plan is required to be taken by Sasang constitutions and lifestyle for health promotion and care of blue-collar workers in the future.

• Journal of the Korean Regional Science Association
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• v.33 no.1
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• pp.69-85
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• 2017

The positive changes in urban space and urban activities resulting from the urban services provided by Smart City is not accomplished by simply creating the physical environment built on ICT but through the cooperation and participation of citizens and private sector, which is in fact key to success. In this study, this research analyzed the role and structure of smart governance, which is a system of horizontal cooperation between public and private sector, and analyze its role in developing Smart City. The study also proposes various ways to facilitate such development in each of critical categories. For this purpose, this research studied 228 smart services across 11 categories registered in the Ministry of Land and Transport in Korea to analyze the spatial distribution of smart services by spatial hierarchy and their characteristics Also, the research conducted a case study of MetroGIS, which is an information collaboration governance system for the greater area of Minneapolis and St. Paul in the state of Minnesota, United States, to explore how governance is formed; its organizational structure; the role of sub-level organization hierarchy and their interrelationship. The results of the analysis suggest that the following conditions are required to create a smart city: first, public sector resource assistance for building community; second, enhanced communication system within the community and with outside the community; securing financial stability and establishing a model of sustainable development to induce the community to evolve into a governance form.

• Journal of Wetlands Research
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• v.20 no.2
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• pp.173-180
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• 2018

The utilization of TOC(Total organic carbon), a new environmental standard, was evaluated for 30 lakes in the Nakdong River Basin, which is used for drinking and agricultural usage. The active use of water resources begins with securing satisfactory water quality. Since this allows people and nature to maintain stability of quality, water quality standards are being tightened to ensure good water quality. In order to improve the pollution level of organic matter in lakes in the living environment, it is important to use the appropriate organic substance index. The relationship between the newly introduced TOC and the existing COD(Chemical oxygen demand) in the targeted lake was positively correlated with the possibility of replacing the TOC with COD. However, the environmental grade standard using TOC is better than the environmental grade standard using COD, so it has the same effect as that of the grade of water quality using TOC as an organic substance factor. This indicates the limitation of TOC to directly replace existing COD when trying to determine or improve the quality level using organic indicators of lakes. Therefore, in order to secure the qualitative safety of the lake, it is required to strengthen environmental standards of TOC in terms of water quality grade. In addition, the correlation between TOC and COD shows a great difference depending on the utilization characteristics of the lake. This requires clear scientific identification, and it requires continuous monitoring of COD that has been used to accumulate indicators of lake organic matter.

• Journal of Korean society of Dental Hygiene
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• v.7 no.4
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• pp.569-582
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• 2007

The author aims at first securing basic material required for developing and operating proper oral health care education programs though making an investigation into the undergraduates of S College of Education on the actual status of oral health care and perceptions of oral health care education. The obtained results were as follows 1. In the actual status of oral care based on whether or not they have experiences in taking oral health care education, undergraduates with teeth brushing for more than three minutes a time were found to be 25.9% and 15.7% respectively according to the existence and nonexistence of experiences in the education(pM0.020), and undergraduates with teeth brushing in a circular motion was found to be 64.7% and 51.7% respectively, showing statistically significant differences(pM0.015). 2. In the actual status of preventative oral care according to whether or not they have experiences in taking oral care education, degrees of awareness of the usefulness of dental cleansers among the undergraduates were found to be 37.6% and 21.5% respectively according to the existence and nonexistence of experiences in the education(pM0.001), undergraduates with experiences in scaling were found to be 51.8% and 34.9% respectively(pM0.002) and undergraduates with experiences in having dental sealants were found to be 26.5% and 16.9%(pM0.031), showing statistically significant differences. 3. In the survey on perceptions of oral health care according to the existence and nonexistence of experiences in oral health care education, it was revealed that the case that they indicated 'the necessity of oral health care education' was 87.1% and 64.0% respectively according to the existence and nonexistence of the experience(pM0.000), and undergraduates intended to 'participate in oral care education for students(at mid and high schools and so on) after being teachers' were 77.6% and 65.7% respectively, showing statistically significant differences(pM0.011). 4. In general characteristics according to awareness of the necessity of cultivating oral health professionals, groups with awareness of the necessity consisted of 31.8% of freshmen and juniors(pM0.001), 55.69b of female undergraduates(pM0.001), 80.8% of non-smokers(pM0.012), 38.9% of large city residents(pM0.002) and 32.3% of undergraduates living in their own houses (pM0.028), showing statistically significant differences.

• Journal of Fashion Business
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• v.10 no.2
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• pp.83-98
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• 2006

With the subjects of male consumers in their 20s to 40s living in the Ningbo area in Zhejiang Province, this study aims to investigate into the reality of their purchase attitude and size fitness of ready-made suits. The results are as follows; Looking into their demographic characteristics, 70.6% of the subjects were twenties, 60.6% were single, and educational career stood in the order of college, middle school, and high school graduation. They were largely absorbed in free trade, followed by teaching, commerce and service industry. 59.6% of them were Zhejiang Province belongs. One to two thousand yuan was the greatest portion of their monthly income. As for their purchase attitude of ready-made suits, they thought higher of material, quality, activity, and solidity than of design. They preferred to buy clothes at a department store. There was significant difference between purchase frequency and purchase price according to monthly income and jobs. Concerning brand recognition, the Chinese subjects favored "Youngor." Though Korea's brands were very lowly recognized, Korean products received really high recognition. Compared with China's brands, they found foreign brands excellent in design, followed by material/matter, wear, and sewing. As to their physical satisfaction and the size fitness of clothes, most subjects felt happy with their sizes. Trousers and jackets were among the unfitting suit items, while the girth of waist was the least satisfactory size. Therefore, in order to raise the market occupation rate of Korean suit goods in China, more aggressive marketing strategies are required to utilize the current Korean-style entertainment and maximize concerning brand images. In particular, outstanding products in consideration of prices should be made through the proper patternmaking to reflect the body types of the Chinese.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.8
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• pp.4901-4907
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• 2014

This study examined how the spatial features, such as the standards of facilities and floor plan of a university dormitory affect the academic achievements. This thesis reports the implications of the management of local universities through the optimization of dormitory environments and provides guidelines for the development of local universities in the face of a decrease in the number of the students. The following results were drawn from a case study of 'S' University which is situated in North Chungcheong Province. First, the students' academic achievements improved with increasing quality of the overall university dormitory. The results show that the dormitory is not only the living space but also the learning space. Considering that an improvement in the students' academic achievements can affect the employment rate of college graduates, providing students with pleasant amenities is very important. Second, the results showed that the academic achievements vary with the spatial characteristics of the residential space; the academic results deteriorated with increasing number of students who share a room. The results of this analysis suggest that a flexible dwelling space that enables the multiple-use residential space to be remodeled into single or double rooms, is very important when facing a decrease in the number of students and the difficult financial stability of the university.

• Economic and Environmental Geology
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• v.53 no.3
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• pp.287-296
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• 2020

Mine Reclamation Project is being carried out with the aim of ensuring a sustainable green living and helping to develop eco-friendly mines by analyzing, removing and preventing the harmful factors. Mines developed during the japanese colonial period and mining boom period are still not repaired throughout the country, and from these scattered risks, public safety is worth pursuing as a top priority. The project that is close to public safety in the mine recalmation project is an emergency treatment, and the most widely used method is a filling method similar to the ground subsidence prevention. If dangerous mine cavity or tunnels are located in the mountains, charging with existing materials may not be possible, or unreasonable cases may occur, and new methods of technological development are required. Emergency actions should be carried out safely and efficiently to prevent the loss of precious people's lives on the hiking paths adjacent to dangerous mining sites. In these field conditions, urethane foam materials may be an alternative. In this study, the applicability of urethane foam materials in mining was reviewed through overseas cases. It was also tested on the appropriate depth of top soil for the protection of urethane foam materials through forest fire simulation test. The test result show that approximately 15cm of soil covering (recommended 20cm over) was suitable for maintaining the function of foam materials from forest fires.

• Archives of design research
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• v.2 no.1
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• pp.13-41
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• 1989

The raw materials for plant-stalk-folkcrafts are cultivated in the whole country. Most Korean farmers, to increase their income, have produced mats and containers with various plants as a side line from very long ago. At first, they began from the instruments of life and then made folkart and at last get to manu\ulcornerfacturing of industrial folk craft. The folkcrafts, made of plant-stalk, which could nor conform to changing society, are partly declined and partly handed down as the traditions. The social change today, however, makes living conditions more speedy and multisided, accordingly the characteristics of demand also become in\ulcornerdividual and various. While the demend is various like this, suppliers cannot answer demendants' requirements, and consequently, the demand and profit cannot be increased. According to this, the purpose of this study is set up to give an answer to the situation that is at the traditional standstill, through an examination of the motives. I. The crafts of plant-stalk are made only in an organized relationship between agriculture, industry and art as it is compounded art of gathering raw material, manufacturing, producing, improv\ulcornering design and production conditions. It may be possible that a farmer gathers material and weaves it manually but in others, it is im\ulcornerpossible to refine, bleach and dye because the process requires a professional industrial treatment. It is impossible to make art works to a farmer as every farner does not always have aesthetic sense. Though a farmer or producer has these all abilities, it is not desirable to him from economical view. 2. The development or improvement is essential in many sides but the most important thing seems to he in design. According to reports, it is, howevt!r, fact that the crafts improved in design of existing works have more expanded the sales than newly developed works. Therefore, ir appears advisable to improve designs of existing things positively as they have merit of occupying a position already, but on the other hand, new crafts have to be also developed and the producer should grasp the proper time. 3. Building up an industrial complex to improve design with collecting the producing districts for this works scattered allover the country is very desirable for speedy communication, intensive educa\ulcorner tion or training, and effective guidance. 4. In producing for export abroad, before everything, must know the life environment, custom! and manners, main thought of the country, and then produce according to these. S. The crafts of plant-stalk are the fIrst industry in present but in the futher it should change intc second or third industry. 6. A synethetic organization for supporting side line should be established for effectiveness, and experts have to be secured and also the educational-industrial complex and activation of study should be preceded.