• International Journal of Naval Architecture and Ocean Engineering
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• 제7권1호
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• pp.195-211
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• 2015

Flat plate friction lines have been used in the process to estimate speed performance of full-scale ships in model tests. The results of the previous studies showed considerable differences in determining form factors depending on changes in plate friction lines and Reynolds numbers. These differences had a great influence on estimation of speed performance of full-scale ships. This study was conducted in two parts. In the first part, the scale effect of the form factor depending on change in the Reynolds number was studied based on CFD, in connection with three kinds of friction resistance curves: the ITTC-1957, the curve proposed by Grigson (1993; 1996), and the curve developed by Katsui et al. (2005). In the second part, change in the form factor by three kinds of friction resistance curves was investtigated based on model tests, and then the brake power and the revolution that were finally determined by expansion processes of full-scale ships. When three kinds of friction resistance curves were applied to each kind of ships, these were investigated: differences between resistance and self-propulsion components induced in the expansion processes of full-scale ships, correlation of effects between these components, and tendency of each kind of ships. Finally, what friction resistance curve was well consistent with results of test operation was examined per each kind of ships.

• 한국식품영양과학회지
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• 제27권4호
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• pp.625-632
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• 1998

To enhance the antimutagenic and anticancer activities of chinese cabbage kimchi, 13 kinds of kimchi, which were different kinds and levels of sub-ingredient added kimchi, were prepared and fermented at 15℃ for 1 day and then at 5℃ up to pH 4.3. The antimutagenic effects of the methanol extracts of the kimchi were studied by using Ames mutagenicity test in Salmonella typhimurium TA100 and SOS chromotest in E. coli PQ37. Among the kimchi samples, high ratio of red pepper powder(7%) and garlic(2.8% or 5.2%) added kimchi, 1% chinese pepper powder added kimchi and organic cultivated chinese cabbage kimchi significantly reduced(p<0.05) the mutagenicity induced by aflatoxin B1(AFB1) in Ames test and SOS response against N-methyl-N'-nitro-N-nitrosoguanidine(MNNG) in SOS chromotest, and also the kimchi inhibited more effectively(p<0.05) the survival and growth of AGS human gastric adenocarcinoma cells than the standarized kimchi on the SRB assay, MTT assay and growth inhibition test. These results suggest that the antimutagenic and anticancer activites of kimchi can be increased by the sub-ingredients such as organic cultivated chinese cabbage, red pepper powder, garlic and chinese pepper powder.

• 동아시아식생활학회지
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• 제4권1호
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• pp.71-77
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• 1994

Although Korean people like Kimchi very much, Kimchi is generally limited in sodium restricted diet of hospital food service operation. The use of Kimchi in sodium restricted diet can improve appetite and nutritional status of patients. In this study, four kinds of Kimchi(Kwail-Nabakji, susan-Nabakji, suk-Gakduki, Oi-Gakduki) were Prepared and analyzed for their Sodium contents. the preference of Kwail-Nabakji and susan-Nabakji was compared with low sodium Juciy kimchi provided in the hospital in 25 patients who were restricted in sodium intake. The result were as follows: 1. In 2 kinds of low sodium juicy Kimchi that salt not added sodium contents of kwail-Nabakji(fruti-juicy Kimchi) and susan-nabakji(ginseng-Kimchi) were 17.8 mg/100g a 11.0 mg/100g, respectively. 2. The otehr 2 kimchies were prepared by adding dilute salted shrimp broth. suk-Gakd uki(boild radish-Kimchi) and Oi-Gakduki(cumcuber-Kimchi) had 89.8 mg/100g and 111.6 mg/100g sodium, respectively. 3. Na/k ratios of 4 kinds of low sodium kimchi were in the range of 0.34-0.62 which were lower than that of general Kimchies. 4. The patients preferred kwil-nabakji and susan-nabakji to low sodium juicy Kimchi provided in the hospital, and most liked Kwai-Nabakju. Therefore low sodium Kimchies can be recommended in sodium restricted diet because they have lower sodium contents then general Kimchies.

• The Korean Journal of Ecology
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• 제12권4호
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• pp.285-295
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• 1989

This report is results of an investigation on the secondary succession and species diversity of the burned area. Fifty hectares of pine forest was burned by the crown fire of the spring (April 6) 1986. The results obtained from spring 1989 were summarized as follows: In the burned area , site and unburned area (U), the vascular plant fo 69 kinds, 49 kinds and 24 kinds were lsted respectively. The life form spectrum of burned area was H---e type, which is common type in most burned area and that unburned area, H---e type. The species diversity (H)and evenness index (e) of burned area (, site) were H=2.51, 1.65 and e=0.59, 0.44 and those of unburned area (U) were H=1.28 and e=0.40. The similarity index was the value of 0.594 in - and 0.236 in -U site. The similarity between and site was greater than between site and U site, and that between and U-site, The dominance index (c) of , and U-site was 0.16, 0.39 and 0.42 respectively. The succession degree (DS) of , and U-site was 244.0, 227.6 and 854.4 respectively. Soil pH, available phosphorous, and exchangeable potassium in the burned area were higher than those in the unburned area, and total nitrogen, organic carbon, and C/N ratio in the burned area were higher than those in the unburned area, and organic matter in the burned area was higher than that in the unburned area.

• 대한가정학회지
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• 제33권3호
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• pp.43-57
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• 1995

The purpose of this study is to explore the characteristics of interaction between the social support network and the korean eldery and to provide information on the structure and function of the social network which influences the life satisfaction in the aged. The sample of this study was selected from the elderly living in korean urban and rural areas. 213 out of urban respondent and 350 out of rural respondent were selected as data sources. The methodological instrument was the questionnaire. The major findings of this study can be summarized as follows : 1. most of the elderly had the relationship with all kinds of social support network-family, kin, neighbors and friends. 2. the elderly having contact with all kinds of the social support network showed the highest life satisfaction. 3. the size, the frequency and the distance weren't important factors in influencing the family, the kin and the neighbors support network in the urban elderly. In the rural elderly the size was an important factor in all the support network. Also the frequency had effect upon all networks except the neighbors and the distance had significant effect upon the family support network. 4. In the urban elderly the friends support network had the positive correlation with life satisfaction. the rural elderly having contact with all kinds of the social support network showed high life satisfaction.

• 한국안전학회지
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• 제25권6호
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• pp.65-69
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• 2010

This paper presented an experimental study of slip resistance characteristics of shoes and floor surface contact with special focus on the effect of surface roughness, outsole material and mechanical abrasion. The factors that affected the results of slip resistances were investigated for four kinds of rubbers and five kinds of floor samples using the VIT(English XL) tribometer. The slip resistance was observed to increase gradually with increasing roughness for five kinds of floor roughness. In the higher surface roughness (larger than $11.5{\mu}m$), the slip resistance increased more rapidly and exceeded safety criteria at $22.60{\mu}m$. The slip resistance was observed to decrease with increasing hardness of outsole, except for butylenes rubber, which seemed to show the material property. The slip resistance decreased with number of trials. In the first several times(5 or 6 trial), the slip resistance decreased more rapidly, whereafter it approached gradually constant value. The slip resistance of surfaces has generally been shown to increase with floor surface roughness and to decrease with hardness of outsole and number of trials under the wet condition.

• 동아시아식생활학회지
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• 제12권6호
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• pp.447-488
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• 2002

The annals of the Chosun dynasty (朝鮮王朝實錄). on CD-ROM was studied to understand e ceremony and dietary culture of the Chosun dynasty. The Chunshin (薦新) ceremony. the service of offering the first food product of the year to ancestors, was begun in the Song dynasty in China and initiated in the Koryo dynasty in Korea. Chunshin ceremony as the national auspicious ceremony was settled through the 311 the Chosun dynasty. The offerings were graded and the Saongwon (司饔院) was in charge of the transportation of them. A king attended the ceremony in person at Jongmyo (宗廟) once in a while. but the Bongsangsi officials usually took charge of ceremony. Even though the harvest of crops had failed due to the drought. the quantity of the offering was not curtailed. Seven kinds of the new products It ere offered in the Koryo dynasty, twenty-seven kinds of them during the reign of king Sejong, and thirty-one kinds of the them during the reign of King Sungjong according to the Gukjooreeui (國朝五禮儀) (1474). The offerings were served on the utensils called Du (두(豆)), Byun (遼), and Jak (爵). Most of the of the offerings were dedicated by public officials and civilians. The meat products in particular were caught by the king on hunting trips, and offered by the king in Person.

• 복식
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• 제5권
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• pp.103-112
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• 1981

In Koryo Dynasty, during the reign of uijong, Choe Yun-ui and others countries collected the royal orders of the Koryo kings and adopted the Tang institutions, and compiled 50 volumes of a book, called "Detailed Ceremonies of Old and New." Recording about clothing, with a special focus on dress and its ornaments of armed vassals, when they attend the king while he is conducting his business. 1) As for the headgear's were the Pokdu, Moja, Kwan, Tumo (official hat to be worn with armors) and Malye (for protection against the cold). There were II kinds of headgear's name in all. 2) As for the clothes, (1) Kongbok (formal costume) (2) Dress, there were 34 kinds of clothes name differented by (i) flowerage on clothes (ii) size of sleeves (iii) color of clothes (iv) fabrics (v) the belt used with the dress. Others were; (3) Baeja (4) Hansam, (5) Poto, and (6) Armor. 3) As for colors of clothes, there were (i) Purple, (ii) Red(Scarlet), (iii) Green, (iv) Blue, (v) Yellow, (vi) Black and (vii) White. 4) As for materials, there were (i) Kum, Ra, Sa (all kinds of silk), (ii) Iron and (iii) Leather. 5) For belts, there were (i) Sockdae, (ii) Hongjung, (iii) Kayeundae, (iv) Dongdokum-dae, (v) Jojung and (vi) Dongshimsokdae.

• 제어로봇시스템학회논문지
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• 제18권8호
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• pp.738-743
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• 2012

This paper describes analysis of long-term experiments on a monitoring system to assess the daily activities of the elderly who live alone. The developed system is composed of an in-house sensing system and a server system. The in-house sensing system installed in their own houses is a typical wireless sensor network system including three kinds of wireless sensors. The server system has a database server and an assessment server. We have installed the system into an elderly house, collected data during over two years continuously, then analyze the data. From the analysis, we could measure the energy consumption profile of three kinds of sensor nodes. The experiment shows all kinds of nodes can operate over one year with two AA-size alkaline batteries. Using a measure of reliability of the monitoring system called 'deadzone', the system has showed the failure operation for 842 hours (4.66 %) during over 18,000 hours total operation period.

• 한국정보시스템학회지:정보시스템연구
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• 제8권1호
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• pp.5-26
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• 1999

In recent years there has been an increasing amount of attention paid to outosourcing of information systems (IS) functions in organizations. The changing and more strategic role of outsourcing in business firms has been given much coverage in academic and trade publications. Trying to remain competitive and up-to-date in the rapidly developing world of computer technology is becoming a financial burden to many organizations in fields such as banking and financial services, health care, and manufacturing. Hiring outsiders to handle part or even all of its information services helps an organization provide better services and maintain a competitive advantage. This paper attempts to provide a benchmark of current IS outsourcing utilization in Korea. A detailed descriptive analysis of survey responses from 78 Korean companies indicates the usage, length of experience, expenditure of outsourcing, and kinds of IS functions being outsourced. The study also analyzes the effects (strategic, economic, and technological) of IS outsourcing with respect to the length of experience, expenditure of outsourcing, and kinds of IS functions being outsourced As a result of the analysis there are significant differences in the strategic, economic and technological effects of IS outsourcing with respect to the expenditure of outsourcing, kinds of IS functions being outsourced and firm size.