• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2008년도 추계학술대회 논문집 Vol.21
• /
• pp.341-342
• /
• 2008

The dynamics of nano particles in LC medium under an external electric field is of theoretical and technological interest. In this work, the dynamical characteristics of fullerene $(C_{60})$ particles in liquid crystal (LC) medium under dc electric field have been investigated. This effect was studied for homogeneously aligned nematic LC cells driven by in-plane field. The $C_{60}$ was found to be aggregated in a form of cluster inside the LC medium. Hence polystytene was used to protect the aggregation of $C_{60}$ in LC medium. When the electric field was applied, the fullerenes start to move in direction of applied electric field. The density of $C_{60}$'s particles at the electrodes increase with increase in the value of applied electric field. The dynamical motions of fullerene $(C_{60})$ particles in liquid crystal (LC) suggest that fullerene can be designed for electrophoretic displays (i.e., electronic ink).

• 한국농촌생활과학회지
• /
• 제5권2호
• /
• pp.93-106
• /
• 1994

The purpose of this study was to develop the pattern of bodysuit and to identify the wear fitness of it The methods of statistical analysis applied to the study were ANOVA and cluster analysis. The materials used in making bodysuit were Nylon/Polyurethane, lace, power net, binding tape, and hook eye. The try-on test was administered in two aspects ; (1) the comparison of anthropometric data before and after trying on the experimentally constructed bodysuit with those of marketing bodysuit, (2) the sensory evaluation to estimate the wear fitness in terms of appearance and motion function. The conclusions obtained are as follows ; 1. In the survey of wearing state, 52.2% of respondents had experience of wearing bodysuit. 60.6% of them responded to the item, “well-balanced body” in the question about the purpose of wearing it. 55.7% considered the item, “feel choky in the chest” as uncomfortable point in putting on bodysuit. 48.3% felt the portion of crotch drawn above in taking exercise or behaving routinely in everyday life. 2. As for the characteristics of the bodysuit design, the scooped neckline and horizontal outline without wire in lower bust was used, the adjust point being located right above the perineum point, and the length of bodysuit is as far as trochanteric point. 3. In comparing anthropometric data of the subjects, there was significant difference in the height of lower bust the distance around abdomen, and the length of bust point(right, left) between the experimentally constructed bodysuit and the marketing bodysuit. 4. Concerning the results of the try-on test in appearance, the estimates of expert panel, which were in agreement with those of subjects in mean value and composite reliability coefficient, showed that the pattern fitness of experimentally designed bodysuit was higher than that of marketing bodysuit. 5. To take try-on test in motion function, motion was classified the five steps. The results of the test showed that experimentally designed bodysuit was fitter in each steps of motion than marketing bodysuit.

• 대한기계학회논문집A
• /
• 제26권7호
• /
• pp.1317-1323
• /
• 2002

This paper describes the comparison of calculated effective stress with experimental one in austenitic heat resistant steels, STS310J1TB and STS310S with and without a small amount of Nb and N. Based on a solute atoms diffusion model, contribution from soluble nitrogen to the high-temperature strength was numerically examined for austenitic heat-resisting Fe-Cr-Ni-N(STS310J1TB) and Fe-Cr-Ni (STS310S) alloys. The solute atmosphere dragging stress of dislocation was calculated in optional dislocation velocity of STS310J1TB and STS310S at $650^{\circ}C$, $675^{\circ}C$ and $700^{\circ}C$. As a result of the numerical calculation, the solute atmosphere dragging stress of STS310J1TB was about 50 times larger than that of STS310S. When the temperature became high, the maximum value of solute atmosphere dragging stress was small and the velocity of moving dislocation was fast. From the relationship between the dislocation rate and the solute atmosphere dragging stress, the relation of both was proportional and the inclination is about 1 in the level with low velocity of moving dislocation. From above results, the mechanism of dislocation movement in STS310J1TB was the solute atmosphere dragging stress. The solute atmosphere dragging stress, which was calculated from the numerical calculation was close to the effect stress in stress relaxation tests.

• 한국지역사회생활과학회지
• /
• 제27권spc호
• /
• pp.665-679
• /
• 2016

This study examined the main factors for activating rural tourism of Jeollabuk-do using big data analysis. The tourism big data was gathered from public open data sources and social network services (SNS), and the analysis tools, 'Opinion Mining', 'Text Mining', and 'Social Network Analysis(SNA)' were used. The opinion mining and text mining analysis identified the key local contents of the 14 areas of Jeollabuk-do and the evaluations of customers on rural tourism. Social network analysis detected the relationships between their contents and determined the importance of the contents. The results of this research showed that each location in Jeollabuk-do had their specific contents attracting visitors and the number of contents affected the scale of tourists. In addition, the number of visitors might be large when their tourism contents were strongly correlated with the other contents. Hence, strong connections among their contents are a point to activate rural tourism. Social network analysis divided the contents into several clusters and derived the eigenvector centralities of the content nodes implying the importance of them in the network. Tourism was active when the nodes at high value of the eigenvector centrality were distributed evenly in every cluster; however the results were contrary when the nodes were located in a few clusters. This study suggests an action plan to extend rural tourism that develop valuable contents and connect the content clusters properly.

• 한국자원식물학회지
• /
• 제19권2호
• /
• pp.336-339
• /
• 2006

홍화 수집종의 RAPD 분석을 통한 유전적 다양성 및 유연관계를 밝히고 품종군을 분류하여 품종육성의 기초자료로 활용코자 시험한 결과는 아래와 같다. RAPD 분석에 적용한 37개의 Primer 중 25개의 적정 primer를 선발하였고, 증폭원 PCR산물은 $0.1{\sim}4.0kb$에서 재현성있는 band를 보였으며 각 primer에 의해 증폭된 band의 수는 $1{\sim}9$개로 다양하였고 평균 4.8개였다. PCR 반응에 사용된 25개의 primer에서 120개의 band가 관찰되었으며 다형성을 보이는 band될 수는 23개(19.2%)였다. RAPD-PCR에 의해 얻어진 dendrogram에서 유연계수 0.042를 기준으로 합을 했을 때 6개 군으로 분류되었고 II군과 III군은 각각 12종(38%)씩 속하였다.

• 한국의류학회지
• /
• 제29권1호
• /
• pp.58-67
• /
• 2005

This study was aimed at the development of scales measuring appearance management behaviors of career men for on-line image consulting. The purposes of this study were to develop a scale which can measure fashion orientation of career men and classify them according to fashion orientation. The data were collected from 380 career men for the first survey and 372 career men for the second survey in Seoul, Korea and were analyzed by factor analysis, reliability test, cluster analysis, one-way ANOVA and Duncan test. The results from this study were as follows: 1) Ten factors of fashion orientation were identified: clothing interest, satisfaction in clothing-selecting ability, individuality and self expression, interest in appearance management, appearance improvement and mood enhancement, clothing conformity, putting value on attractive appearance, maintenance of neat appearance, weight control and pursuit of fashion. The total variance explained by the ten factors was $65.70\%$ and Cronbach's $\alpha$ of 10 factors ranged from $.60\~.92.$ 2) Three groups were classified by the representative items of fashion orientation factors : passive appearance management group who were conscious of other people, positive appearance management group who were highly fashion-oriented and indifferent group to appearance management. The fashion orientation characteristics of groups classified in the second survey were nearly similar to those in the first.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.82-82
• /
• 2017

The production of spring wheat, the major crop in Mongolia, is accounting for 98% of the cultivated area. Collection, conservation and utilization of wheat germplasm resources play an important role in wheat breeding and production in Mongolia. Understanding genetic variability in the existing genebank accessions is important for collection and conservation of wheat germplasms. To determine the genetic diversity and population structure among a representative collection of Mongolian local wheat cultivars and lines, 200 wheat accessions were analyzed with 15 SSR markers distributed throughout the wheat genome. A total of 85 alleles were detected, with 3 to 5 alleles per locus and a mean genetic diversity value of 5.66. The average genetic diversity index was 0.68, with values ranging from 0.37 to 0.80. The 200 Mongolian wheat accessions were divided into two subgroups based on STRUCTURE, un-rooted NJ cluster and principal coordinate analyses. The results from this study will provide important information for future wheat germplasm conservation and improvement programs with Mongolian genebank.

• 환경생물
• /
• 제28권1호
• /
• pp.1-7
• /
• 2010

Small wetlands in an upland matrix can support diverse vegetation composition that increase both local and regional species richness. In this study we characterize the full range of wetland vegetation in an upland forest landscape at Dumyeong-ri, Gijang-gun, Busan. This wetland index can be calculated with species data, or with community type data as performed. Classified community types were used to describe vegetation at three wetlands and adjacent areas. The communities contained 28 species of vascular plants and 28 species were identified four plant community types. The Pinus densiflora type was dominated by Pinus densiflora and contained only four species. None of the plots had high proportion of standing water. The Carpinus laxiflora type had high obligate upland species (OU) and facultative upland species (FU). The Rhododendron mucronulatum type grew in over half of the plots included Pinus densiflora and Alnus japonica. Some species bother swampy areas adjacent to site C. The Miscanthus sacchariflorus type consisted of seasonal wetlands. The three sites contained nine species with the strongest indicator species being Miscanthus sinensis var. purpurascens, Miscanthus sinensis, Echinochloa crus-galli, and Sagittaria aginashi. This type had the highest proportions of obligate wetland species. Plant species richness averaged 5.069. Shannon-Weaver index of diversity also varied among the community types (F=22.7, df=4, 115), with the types FU having significantly higher value (2.746) than the others (1.057 for type FW and 1.600 for type OU). Regional plans including all of the diverse types of wetland vegetation in upland forests will contribute substantially to the conservation of plant diversity.

• 한국가구학회지
• /
• 제24권4호
• /
• pp.433-443
• /
• 2013

The furniture industry of the northern region of Gyeonggi Province consists of several regional complexes which was just autogenously, that is, not based on the organized and planned movements cultivated and clustered, so it stays small businesses. This fact certainly requires to find right courses for future policy direction, in order to develop the furniture industry centering in the northern region of Gyeonggi Province internationally competitive. Consequently the aim of the present study was to investigate the characteristics of the furniture industry in the northern region of Gyeonggi Province first and to present right development directions for the innovation of the structure of furniture industry according to the change of the times, i.e. to connect the industry, university and the authorities concerned well and to strengthen the technology level of furniture industry accordingly. In addition, this requires education and training of the excellent designers being able to create high added-value industrial sectors, including finding a new Korean national brand which should preoccupy the global market. Furthermore, the high-tech furniture industrial complex specialized in manufacture, distribution and marketing such as the division of work between business to business should be built and finally a Korean traditional & unique furniture culture should be created on the basis of a cultural approach of furniture industry. It would be the timing for entire business sectors related to Korea's furniture industry to establish an international standard certification like ISO, in order to upgrade the quality of furniture steadily while keeping our own tradition, and this belongs to a meaningful attempt for the high-tech lifestyles and the improvement in the quality of life of customers.

• 한국전기전자재료학회논문지
• /
• 제29권7호
• /
• pp.429-434
• /
• 2016

This paper deals with the characteristics of partial discharge (PD) for the purpose of a condition based maintenance (CBM) of gas insulated switchgears (GIS) in power equipment. Four types of electrode systems such as a protrusion on enclosure (POE), a particle on spacer (POS), a free particle (FP) and a Floating were designed and fabricated. PD pulses were measured using UHF sensor with a frequency range of 300 MHz~1.4 GHz and a DAQ with a sampling rate of 250 MS/s. Discharge inception voltage (DIV), discharge extinction voltage (DEV), and phase resolved partial discharge (PRPD) were analyzed depending on electrode systems. The average DIV in the POS was 28.8 kV. It was about 1.7 times higher than that in the FP, which was the lowest value of 17.2 kV. The FP shuffled and jumped at the applied voltage of 23.5 kV. Over 95% of PD pulses in the POE were generated in the negative polarity ($181^{\circ}{\sim}360^{\circ}$) of applied voltage. The results showed the phase (${\Phi}$)-magnitude (dBm) of PD pulses by UHF sensor, a cluster was formed separately depending on electrode systems.