• Journal of Life Science
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• v.15 no.4 s.71
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• pp.561-565
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• 2005

In this study, we report antigenotoxicity and cytotoxicity of Korean Radish extract (RJ) and its seed protein (RSP) to non-tumoral 3T3 cell line. In the case of antigenotoxicity, each cell line was treated with $10{\mu}l\;of\;100{\mu}g/ml$ N-methyl-N'-nitro-N-nitrosoguanidine(MNNG) before adding $10{\mu}l$of 10mg/ml RJ and 1mg/ml RSP to the cell. Both RJ and RS were shown $30\%\;and\;43\%$ of antigenotoxicity respectively. As a result of quantitative analysis for lactose dehydrogenase (LDH), no cytotoxic activity against 3T3 cells was detected when the cells were treated with various concentrations of RJ and RSP, RSP showed $85\%$ of antimicrobial activity against cosmetic sample (C1) assumed as contaminated by bacteria. RSP and RJ showed $79\%\;and\;76\%$ of antimicrobial activities repectively on another cosmetic sample (C4, contaminated by fungi) were treated with 10mg/ml RJ and 1 mg/ml RSP

• Archives of design research
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• v.15 no.3
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• pp.39-52
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• 2002

The importance of color is increasing in modern life and we call such present age that is color age. These day that all areas of life are being getting fashionize, ordinary people as well as design specialist are required of culture and knowledge about color. Color is important factor of marketing because ability that color appeals to human's sensitivity is bigger than form. Color design education is important curriculum at liberal arts course and in special design training course. Color expresses by hue, value and chroma but design spot is using mainly hue and tone color system. Therefore, it is very important that educate tone concept in color design education But research of hue and tone color system is insufficient in domestic. We educate foreign color system and use mainly imported color paper. When think influence that increase of color, we must develop hue and tone color system in suitable for color design education and plan the color paper that conform to it. This research designed usable "Hue and Tone Color System 253" for general color design education. Also I designed 121 color papers for primary grade, 181 color papers for intermediate grade, 253 color papers for higher grade of color design education as specific practical use of "Hue and Tone Color System 253".or System 253".

• 대한공업교육학회지
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• v.39 no.1
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• pp.47-65
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• 2014

The purpose of this study is to investigate the university academic achievements on the high school graduates of specialized vocational high school and general high school selected by the university admissions officer system. The implications of this study will contribute to improve development of university admission through the analysis of university admission achievements and correlation between university admission factors and university academic achievements. Participants of this study were university students selected by admission officer system in 2011 and have enrolled in the university for 6 semesters at A university. The results of this study are as follows: First, when it comes to the grades of university admission factors, graduates from specialized vocational high school outperformed those from general high school. Second, when it comes to the correlation between university academic achievements and university admission factors, graduates from specialized vocational high school slightly outperformed those from general high school. Third, when it comes to the correlation between university academic achievements and university academic achievements, graduates from specialized vocational high school showed poorer performance than those from general high school in overall courses and liberal arts courses. However, in major courses, graduates from specialized vocational high school outperformed those from general high school. Finally, when it comes to the development of university academic achievements, both of them showed a tendency of being improved as they advanced through school. Based on the findings of this study, several implications can be made as follows: First, it is necessary to improve the application ratio and application method of university admission factors. Second, it is required to provide preparatory courses of university to help graduates from specialized high school get adapted to university course of study.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.8
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• pp.1908-1918
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• 2013

Free-view, auto-stereoscopic video service is a next generation broadcasting system which offers a three-dimensional video, images of the various point are needed. This paper proposes a method that parallelizes the algorithm for arbitrary intermediate view-point image fast generation and make it faster using General Propose Graphic Processing Unit(GPGPU) with help of the Compute Unified Device Architecture(CUDA). It uses a parallelized stereo-matching method between the leftmost and the rightmost depth images to obtain disparity information and It use data calculated disparity increment per depth value. The disparity increment is used to find the location in the intermediate view-point image for each depth in the given images. Then, It is eliminate to disocclusions complement each other and remaining holes are filled image using hole-filling method and to get the final intermediate view-point image. The proposed method was implemented and applied to several test sequences. The results revealed that the quality of the generated intermediate view-point image corresponds to 30.47dB of PSNR in average and it takes about 38 frames per second to generate a Full HD intermediate view-point image.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.7
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• pp.978-984
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• 2018

Structural equation modeling is pointing to statistical procedures that simultaneously perform path analysis and confirmatory factor analysis. Today, this statistical procedure is an essential tool for researchers in the social sciences. There are as AMOS, LISREL and PLS representative tools that can perform structural equation modeling analysis. AMOS provides a convenient graphical user interface for beginners to use. PLS has the advantage of not having a constraint on normal distribution as well as a graphical user interface. Therefore, we compared and analyzed the three most commonly used tools (applications) in social sciences. Based on structural equation modeling, confirmatory factor analysis was performed using the IBM AMOS Ver. 23, the LISREL 8.70 and the SmartPLS 2.0. The comparative results show that LISREL has the highest explanatory power of dependent variables than other analytical tools. The path coefficients and T-values presented by the analysis results showed similar results for all three analysis tools. This study suggests practical and theoretical implications based on the results.

• Applied Biological Chemistry
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• v.11
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• pp.77-82
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• 1969

In order to determine an optimum pressure condition of the storage chamber of apples, several reduced pressure were examined for the Jonathan. The results obtained checking various storage conditions are as follows. 1. The optimum pressure of chamber atmosphere for apple storage was 10 cmHg. 2. Under the pressure of 10 cmHg, the normal (room) temperature storage was better than the cold storage. 3. Under reduced pressure, poly-ethylene film wrapping of apple showed a good result in a short-term (less than one and half month) experiment. 4. No noticeable effect was observed by O.E.D (Oxy-ethylene doxanole) or sodium dehydro acetate treatment. 5. Change of the components (total sugar, reduced sugar, acid and vitamin C) of apples according to the storage methods showed similar results to our previous report, Studies on The Reduced Pressure Storage of Fruits (I)

• Applied Biological Chemistry
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• v.22 no.2
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• pp.101-108
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• 1979

The viscosity of mucilage of Abelmoschus Manihot, Medic root decreased by the influence of various mechanical, physical and chemical conditions. It was experimented by viscosity decrease of mucilage connected with hydrogen ion concentration, bacterial multiplication, disinfection with 70% ethanol, some antibiotics, such as streptomycin, penicillin, ganamycin and chloramphenicol and mucilage derived from autoclaved Abelmoschus Manihot, Medic root. The results obtained were as follows: 1. It was clear that the viscosify of mucilage decreased notably under the influence of infected bacteria and bacterial multiplication. 2. By the inoculation of Bacillus subtilis ATCC 6633 and Escherichia coli ML 1410 to the mucilage the viscosify decrease fast but the viscosity of mucilage derived from autoclaved, Abelmoschus Manihot, Medic root. 3. The small quantity of reducing sugar in the mucilage was detected. 4. Hydrogan ion concentration in the mucilage remained $6.5{\sim}8.0$ in spite of the viscosity decrease.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.3
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• pp.896-905
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• 2010

The sensor networks can be used attractively for various application areas. Time synchronization is important for any Ubiquitous Sensor Networks (USN) systems. USN makes extensive use of synchronized time in many contexts for data fusion. However existing time synchronization protocols are available only for homogeneous sensor nodes of USN. It needs to be extended or redesigned in order to apply to the USN with heterogeneous sensor nodes. Because heterogeneous sensor nodes have different clock sources with the SinkNode of USN, it is impossible to be synchronized global time. In addition, energy efficiency is one of the most significant factors to influence the design of sensor networks, as sensor nodes are limited in power, computational capacity, and memory. In this paper, we propose specific time synchronization based on master-slave topology for the global time synchronization of USN with heterogeneous sensor nodes. The time synchronization master nodes are always able to be synchronized with the SinkNode. Then time synchronization master nodes enable time synchronization slave nodes to be synchronized sleep periods. The proposed master-slave time synchronization for heterogeneous sensor nodes of USN is also helpful for power saving by maintaining maximum sleep time.

• Korean Journal of Applied Biomechanics
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• v.26 no.4
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• pp.343-351
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• 2016

Objective: The purpose of this study was to help improve game performance and provide preliminary data to enhance the efficiency of the kick and stability of the support foot by comparing the kinematic characteristics of the repeated side kick (geodeupyeopchagi) in poomsaeKoryo between expert and non-expert groups. Method: The subjects were divided into 2 groups according to proficiency in Taekwondo, an expert group and a non-expert group (n = 7 in each group), to observe the repeated side-kick technique. Four video cameras were set at a speed of 60 frames/sec and exposure time of 1/500 sec to measure the kinematic factors of the 2 groups. The Kwon3D XPprogramas used to collect and analyze three-dimensional spatial coordinates. Ground reaction force data were obtained through a force plate with a 1.200-Hz frequency. An independent samplesttest was performed, and statistical significance was defined as .05. The SPSS 18.0 software was used to calculate the mean and standard deviation of the kinematic factors and to identify the difference between the experts and non-experts. Results: The angular displacement of the hip joint in both the expert and non-expert groups showed statistical significance on E1 and E4 of the left support foot and E5 of the right foot (p<.05). The angle displacement of the knee joint in both groups showed statistical significance on E4 of the left support foot, and E1 and E2 of the right foot (p<.05). The angular velocity of the lower leg in both groups showed no statistical significance on the left support foot but showed statistical significance on E2 and E6 of the right foot (p<.05). The angular velocity of the foot in both groups showed no statistical significance on the left support foot but showed statistical significance on E2 of the right foot (p<.05). The vertical ground reaction force in both groups showed statistical significance on E2 (p<.05). The center of pressure in all directions in both groups showed statistical significance (p<.5). Conclusion: While performing the repeated side kick (geodeupyeopchagi), the experts maintainedconsistency and stability of the angle of the support leg while the kick foot moved high and fast. On the other hand, the angle of the support foot of non-experts appeared inconsistent, and the kick foot was raised, relying on the support leg, resulting in unstable and inaccurate movement.

• Journal of the Korean Vacuum Society
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• v.15 no.6
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• pp.612-618
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• 2006

Surface modification of PTFE by ion irradiation was performed to improve its surface properties, In the case where argon was used to irradiate the PTFE films, an increase in the adhesion strength was observed when the ion fluence was over $1\times10^{15}\;ions/cm^2$, but the surface morphology dramatically changed to a needle-shaped one. However, when we used hydrogen ions under $O_2$ environmental gas, the adhesion strength increased at an ion fluence of $5\times10^{16}\;ions/cm^2$ and the surface morphology by the hydrogen irradiation was not needle-shaped. The surface morphology and adhesion strength of the hydrogen modified PTFE was influenced by the oxygen flow rate. It was confirmed by reflectance measurements that the surface properties of the hydrogen ion irradiated PTFE were superior to those of the argon ion irradiated PTFE.