• Journal of the Society of Cosmetic Scientists of Korea
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• v.47 no.1
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• pp.41-48
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• 2021

Formulations which are dispersed in water are often used in color cosmetics because they are characterized by no powder flying, not sticky, and high adherence while giving a light feeling of use. However, little research has been considered on the effect of the pigment on the above formulations used in color cosmetics. In this study, experiments were conducted to measure and analyze the effect of pigments on the formulation of pigments, organic pigments, and pearl polish, which are mainly used in the manufacture of color cosmetics, on appearance changes, pH changes, and photometric stability. Carmine or ferric ferrocyanide coated titanium dioxide mica-based pigments were not suitable for use due to poor photostability, with colors appearing on the surface from low viscosity formulations. Organic pigments had a good photostability of 1% of the formulation which are dispersed in water, but were not suitable for use because they came out of color on the water surface and did not spread well due to the clumping of powders. The titanium dioxide mica system pigments coated with pearl polish, inorganic pigments, and iron oxide were suitable for use due to their excellent appearance and optical stability in the formulation. Furthermore, the pH of all samples distributed by each pigment seems to be within the range of 3.0 to 9.0, which is suitable for cosmetic applications. This is expected to help manufacture color cosmetics with a stable water dispersible formulations by selecting and using stable pigments in anticipation of the behavior of pigments in the formulations.

• Journal of Bio-Environment Control
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• v.32 no.2
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• pp.139-147
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• 2023

This study aims to select eggplant cultivars adaptive to the hot temperature period greenhouse climate by water consumption, and growth performance of plants and fruits of different European eggplant cultivars, including 'Bartok (BA)', 'Bowie (BO)', 'Black Pearl (BP)', 'Ishbilia (I)', 'Mabel (M)', 'Vestale (VE)' and 'Velia (VL)', in substrate hydroponic cultivation under hot and humid greenhouse conditions. On the 118 DAT, the leaf number and stem dry weight were highest in 'VL', followed by 'M', and there was no significant difference in leaf dry weight among cultivars. The marketable fruit number per plant was 16.4 for 'M', which was higher than other cultivars, and 'VE' and 'VL' were 8.5 and 8.8, respectively. The weight per fruit was low for 'M' at 136 g, and the highest in 'VE' and 'VL' at 332 and 281 g, respectively. There was no significant difference in fruit production per plant. In this study, 'M', which has high water use efficiency and a large number of fruits, and 'VL', which required less quantity to water consumption for producing 200 g of fruit and had a high product weight, will have excellent adaptability in the UAE greenhouse condition.

• Conservation Science in Museum
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• v.30
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• pp.89-100
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• 2023

Museum collections are comprised of a variety of materials, and different scientific examinations are being conducted according to the types and production properties of the materials, but insufficient research has been carried out on ultra-small artifacts. To identify the material characteristics of the white ultra-small materials excavated from Geumnyeongchong tomb, this study carried out a wide range of non-destructive analyses (specific gravity, microscopy, nano-computed tomography (Nano-CT), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), and Raman spectroscopy) and compared the said artifacts with the Goryeo-era burial accessories examined in prior research. Non-destructive analysis confirmed the presence of aragonite, which mainly consists of calcium carbonate (CaCO₃) as the constituent mineral, and identified the material used for the ornaments as the gemstone pearl based on its growth lines. This study concludes that pearls began to be used in the ancient Korean Peninsula in the 6^th century. It is expected that scientific examinations of the white ultra-small artifacts will yield information about the social culture of the time.

• The Journal of the Convergence on Culture Technology
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• v.10 no.2
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• pp.99-106
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• 2024

This study classifies images according to changes in wedding hair and equipment and approaches and presents creative designs using pearls and crystals to preserve the subtle and soft gloss of pearls. In addition, in modern times, it is intended to help women as a new part of hair art design art expression by expanding their choices with unique designs and decorative means that give women a special sense of humor by expressing them in various materials and forms in creating complementary and individualistic hairstyles. A total of three works were produced and analyzed to shape images according to changes in wedding hair jewelry, which can create designs by harmonizing the subtle and soft gloss of pearls with the splendor of crystals, so that they could be provided as new motifs for real-life marketability in creative and original hair art. The work was produced by the design intention and method, design development, production intention, production process, and work completion. It was possible to derive a unique up-style decoration that reveals one's personality while having both practicality and decoration. It is expected that the research on colored hair art design will continue as a motif for the development of hair art works and the commercialization of real life.

• The Plant Pathology Journal
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• v.22 no.3
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• pp.222-229
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• 2006

Twenty-two isolates of Fusarium oxysporum f. sp. fragariae were obtained from diseased strawberry plants and their characteristics were investigated by vegetative compatibility group (VCG), random amplified polymorphic DNA (RAPD), and pathogenicity. Three major VCGs (A, B, and C) and one incompatible group were identified by nitrate reductase complementation test. The virulence pattern of the 22 isolates was studied in relation to four cultivars including Dochiodome, Red-pearl, Maehyang and Akihime. RAPD markers were used to determine genetic relationship, and created three major clusters among the 22 isolates of F. oxysporum f. sp. fragariae. Isolates belong to VCG-C were strongly pathogenic, and relatively high correlation was existed among VCG and RAPD, and virulence. In addition, VCG and RAPD pattern between pathogenic and non-pathogenic isolates were distinctly different.

• Journal of Electrical Engineering and Technology
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• v.10 no.1
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• pp.227-242
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• 2015

This paper proposes a weighting factor optimization method in predictive control algorithm for torque ripple reduction in an induction motor fed by an indirect matrix converter (IMC). In this paper, the torque ripple behavior is analyzed to validate the proposed weighting factor optimization method in the predictive control platform and shows the effectiveness of the system. Therefore, an optimization method is adopted here to calculate the optimum weighting factor corresponds to minimum torque ripple and is compared with the results of conventional weighting factor based predictive control algorithm. The predictive control algorithm selects the optimum switching state that minimizes a cost function based on optimized weighting factor to actuate the indirect matrix converter. The conventional and introduced weighting factor optimization method in predictive control algorithm are validated through simulations and experimental validation in DS1104 R&D controller platform and show the potential control, tracking of variables with their respective references and consequently reduces the torque ripple.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1-8
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• 2005

Baiyangdian Lake, the largest freshwater lake in North China, is known as 'Pearl of North China' and 'kidney of North China' fur its abundant products and multiple ecological services. However, from the 1970s, due to the ever-increasing discharge of polluted water from upstream rivers, it has been severely polluted. Sediment Investigation and analysis were conducted on contents of heavy metal (Cu, Zn, Cd and Pb) from Baiyangdian Lake in June 2004. Results showed that pollution situation at downriver regions are more serious than that of upstream regions. The seriously polluted spots are access of Fuhe River, original wastewater reservoir of Tanghe River, densely populated Chunshui Village and Wangjiazhai Village. By using method of the potential ecological risk assessment, the heavy metal evaluation of polluted sediment has been conducted. The results showed that the contents of Cd and Pb were very high in sediment of Baiyangdian Lake. There were extremely stronger ecological risk for Cd and slight- medium ecological risk for Pd. According to the current situation of Baiyangdian Lake, countermeasures and suggestions have been put forward.

• Rapid Communication in Photoscience
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• v.1 no.1
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• pp.13-15
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• 2012

New porous $TiO_2$ nanostructures with shapes of pearl and rice were synthesized by hydrothermal treatment of $TiO_2$-liposome nanocomposites in acid and base solutions, respectively, as identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM) images and large Brunauer-Emmett-Teller (BET) surface areas. The x-ray diffraction (XRD) patterns and selected area electron diffraction proved them to be well-defined anatase crystals. Their UV-visible reflectance absorption spectra were observed to have low band gap energy (3.03 and 3.07 eV, respectively), exhibiting surface absorption band in the visible range from 400 to 600 nm. The degradation of methylene blue (MB) over the $TiO_2$ nanostructures was observed upon visible-light irradiation, which was found to be very efficient as compared with any other conventional visible-light responsive $TiO_2$ nanostructures.

• The Journal of Korean Society for School & Community Health Education
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• v.10 no.1
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• pp.61-86
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• 2009

본 연구는 영문으로 발표된 문헌고찰을 통해 한국의 청소년 자살행동의 예측요인을 종합적으로 이해하고 이과 관련된 정책과 중재프로그램의 동향을 파악하는데 그 목적을 두었다. 이 연구의 목적은 나아가 한국 청소년 자살을 감소시키고 억제하는데 필요한 효과적인 중재방안의 개발에 근거자료로 활용될 수 있다. 본 연구는 주제어 검색을 통해 4대 사회과학 검색엔진을 활용하여 문헌검색을 하였고 Citation Pearl Growing 기법을 적용하여 영문으로 발표된 학술지 게재 논문을 선별하였는데 추가적으로 국회도서관 전자 데이터베이스를 이용하여 최근 청소년 자살에 관한 대표적인 2개의 보고서를 찾아 고찰하였다. 본 문헌고찰은 청소년 자살예방 중재 프로그램 뿐만 아니라 청소년 자살행동에 영향을 주는 요인을 거시적, 미시적 차원으로 논하였다. 청소년 자살행동에 기여하는 거시적 또는 사회적 요인은 국가 경제수준, 대학입시에 대한 학업성취도 스트레스, 그리고 매체 및 인터넷 문화였다. 개인적 또는 미시적 위험요인은 6개의 영역으로 나누어 설명되었다. 일반적 특성, 가족 특성, 학교 환경, 약물 사용, 정신적 장애, 성적 정체성이었다 이 6개 영역의 위험요인들이 서로 조합되면서 청소년에게 자살 의도나 시도가 일어나도록 하는 경향이 높았으며 이중 청소년 자살 예방에 우선적인 3대 요소는 자아정체성 확립, 정신건강 중재서비스의 제공, 거시적 예방 정책의 구조화로 분석되었다. 종합적으로 학교는 정규학교교육과정과 학생 검사를 통해서 일반적인 정신건강교육을 실시하고 위험학생을 선별 하는데 핵심적인 장이다. 따라서 학교를 경유한 위험학생 선별사업과 이에 따른 교육 및 중재 프로그램의 지원이 활성화되는 것이 필요하다.

• Proceedings of the Korean Society of Crop Science Conference
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• 1998.09a
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• pp.22-34
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• 1998

Coarse grain crops including maize, sorghum, buckwheat, fox-tail millet, pearl millet, proso millet and barnyard millet have been used as health food, feed and industrial materials in Korea for a long time. Korean ancestors thought and treated them as the very important good crops for human health and the crops have served as a dish made with all the grains, particularly in January 15 of the lunar month in korea because the grains make the five viscera of heart, liver, spleen, lungs and kidneys and the six entrails of gall bladder, stomach, small and large intestines, the paunch, the bladder, and the bowels strong and build healthy body. Thus, the objectives of the paper were to review and summarize the results obtained from the quality breeding and functional researches worldwide on nutrition, utilization and medical action of the coarse grain crops. Maize grain, fresh ear and green fodder yields have increased since 1960s in Korea. Agronomic traits improvements also occurred for cold tolerance, disease and insect resistance, resistance to barrenness, resistance to loding, pollen production, grain and seed yields, and eating quality. For buckwheat, improved summer buckwheat varieties produced more rutin for vegetable and grain than autumn varieties in Korea