• Design & Manufacturing
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• v.18 no.3
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• pp.1-8
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• 2024

Macular degeneration is a disease that damages the macula, the center of the retina, and is one of the three major eye diseases along with glaucoma and diabetic retinopathy. The optic nerve and most of the photoreceptor cells are located here, and since this is where images of objects are formed, it is the most important area for vision. The main symptom of macular degeneration is the inability to clearly distinguish the shape of objects or the inability to distinguish colors and light and dark. It is also a serious eye disease that causes black spots in the center of the field of vision. However, it is difficult to distinguish it from the form of vision loss due to presbyopia, so early diagnosis is often missed. The most common treatment for macular degeneration is antibody injection therapy. This treatment requires regular injections once every 1-2 months. When receiving antibody injection therapy, the fear of having to inject directly into the eye and the cost of long-term repeated procedures are a great burden to patients. To overcome these problems, special sustained-release formulations using drug delivery systems are being developed. Since the release speed and release time of the drug can be controlled, the number of times the drug is administered can be drastically reduced. However, the implant (Ø 0.46×6.0mm), which is a sustained-release agent, is manufactured by mixing biodegradable resin (PLGA) and therapeutic agent in a ratio of 4:6, so it is very brittle and there is a high risk of implant damage during handling. In order to safely insert the implant into the eye, a transport device that can be driven with controlled force is required. Therefore, in this study, the lever operating force was measured and analyzed to determine the influence of factors according to the cross-sectional thickness and shape of the linkage produced through injection molding as well as the post-process.

• Journal of the Korea Fashion and Costume Design Association
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• v.26 no.3
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• pp.99-112
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• 2024

This study aims to analyze the characteristics of 'Korean Chic' through the collections of Korean designer Eudon Choi, who has gained prominence in the international fashion market. The term 'Korean Chic' encompasses four main traits: coexistence, eclecticism, practicality, and uniqueness. First, coexistence involves blending masculine and feminine elements as well as traditional and modern aspects. This is evident in Choi's use of strong, angular designs typically seen in menswear alongside soft silhouettes and feminine touches found in womenswear. Additionally, traditional Korean hanbok elements are harmoniously integrated with modern design techniques. Second, eclecticism is seen in the balanced mix of direct and subtle expressions, including the fusion of hanbok details with diverse fashion elements, and the combination of monochromatic and vivid colors. This trait also involves blending strong and delicate features to create a dynamic and versatile look. Third, practicality is a cornerstone of Choi's design philosophy. He emphasizes the importance of creating wearable yet innovative pieces that are suitable for daily wear. His collections feature practical materials and items that prioritize comfort without compromising creativity. Last, unique is highlighted through hidden details and unexpected design elements. Choi often incorporates surprising prints or decorations that are not immediately visible, adding an element of discovery and delight for the wearer. This can include witty combinations of traditional and contemporary elements, as well as formal and casual styles. Through study aims to shed light on the design identity of Korean fashion designers by examining the characteristics of Korean Chic in Eudon Choi's work. It also calls for further research on other Korean designers to enhance the understanding and global recognition of Korean fashion's unique aesthetic and growing influence in the international fashion scene.

• Journal of the Korean Society of Costume
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• v.16
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• pp.221-229
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• 1991

This thesis aims at reviewing the wearing aspect and formation of Chosun ceremonial dresses for meal and finding out the thought reflected by them from the standpoint that dresses themselves should be taken as one of the phenomena in culture. That is men's ceremonial costumes and confucian costumes of the royal family and the gentry family in Chosun is reviewed focused on the formation and the wearing aspect of Po, Which is a kind of them. And in the context of the phase of the times. I also considered the thoughts reflected on the clothes such as confucianism, Ying & Yang Theory, and the symbol and the thoughts of patterns in relation to the clothes. Confucian influence was the main force for the Chosun prohibitions for clothes. The major reasons for the prohibitions for clothes were as follows. First, they reflected confucian Chung myoung chooui(the principle that everything should be where it belongs). That is the prohibitions for clothes were used in the means to maintain feudalistic social order. influenced by social rank system. Second, they reflected confucian ethics in the means to recover social disciplines with the maintenance of traditional customs. This shows well in the restriction of luxurious items in dressing included the prohibitions for clothes. Third, they reflected Chosun's toadysm toward China. With the influx of Chinese style of dressing then government even changed the style of uniforms for public officials into that of Chinese resulting in dual styles of dressing. Ying & Yan Theory greatly affected the colors of Korean clothes and reflected toadysm toward China. too. The theory was embodied by prohibition of such colors for clothes as white, gray, and jade green. I reviewed the twelve patterns on Myunpok, Ten-Longivity patterns and Four-Gracious plants patterns in order to analyze the symbolism and thoughts of patterns for clothes. Nansam, Dopo, and Shimui worn by confucian scholars ensures that those clothes bears confucianism and philosopical factors. As shimui was worn by many people it appears in Chosun scholars' studies and a Chinese book called "Yeki". I reviewed the origin, procession, and ornaments of four ceremonial clothes and tried to find out the confucianism in them. First, In Kwanrei (the coming-of-age ceremony) remained ancestor worship and respect for manners. The clothes for this ceremony granted the rights and responsibilities of and adult to the wearer. The royal Kwanreipok had different dresses for each rank. As Samgapok, the crown prince wore Iksunkwan and Konryongpo for the first ritual, Wonryukwan and Kangsapo for the second, and Myunrukwan and Konpok for the third. The rank of the King's grandson was lower than the crown prince's. This example shows that Chosun people respected manners and thought the basic confucianism "God and people are equal." at the Royal court. Second, as Honreipok(wedding gown), the crown prince wore Myunrukwan and Konpok for Daereipok, Wonyukwan and Kangsapo for Napjing and Tongwoo, and Iksunkwan and Konryongpo for Chekbinui. But common people were allowed to wear an official outfit only for wedding in the means of congratulation on the most important day of their life. Wedding gowns which reflected Ying and Yang Theory emphasized the thought that union of a man and a wife is the most important event in life. Third, Sangrei(funeral) was the last ritual of a human being to send off the deceased. The mourning dresses expressed lamentation of the people left behind. Five-Dress-System for each the relative degree of familarity showed the solemnity and formality, which represented the formality of confucianism and ancestor worship. I reviewed the mourning dresses by dividing them into royal, Yangban's, and commons. They were featured by the fact that there was only one style for every walk of life. It is construed that anyone in mourning can wear the same clothes since he feels the same way regardless of his social rank. Fourth, Chereipok(sacrificial rite dresses) had different styles for each social rank. The King wore Myunpok(Kuryumyun and Kujangpok) were recorded to be worn first in the fourth year of King Taecho's ruling. The crown prince wore Palryumyun and Chiljangpok for sacrificial rite dress which was finally settled when King Sejong was in power. Common people wore Dopo, Shimui for the rite dress in the beginning of the Chosun Era and wore Dopo after Japanese invasion of Korea in 1592. In conclusion, confucianism played the main role in ceremonial dress system of Chosun and that was because it emphasized the ethics of action in life, which was different from other religions. It is true that cause-oriented thoughts and Chung myoung chooui in confucianism drove all ceremonies to extreme manners, discriminating the people who belonged to the lower social rank, and resulting in extremly luxurious life style. However, they also created a unique trend and clothes culture in the Chosun Era. I wish that this thesis provieds important information and direction for furthur studies in the future.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.18 no.2
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• pp.133-140
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• 2008

In order to evaluate the possible environmental lead hazard in children's playground and to test the practicability of field portable x-ray fluorescence(FPXRF) for environmental lead measurement, authors investigated lead concentration of lead-based paint on the surface of children's playing equipments in the playground of 13 apartments using FPXRF at the site in city A, Choongnam province. 93 spots were determined surface lead concentrations 3 times each using a FPXRF. Out of 93 spots, 83 spots (92%) were revealed to have lead in paint and mean concentration was $1.12{\pm}1.76mg/cm^2$. The mean concentration of lead on the surface of playing equipments at the apartments near the main street was $1.20mg/cm^2$ and higher than those at the apartments far away from the main street($0.81mg/cm^2$)(p<0.05). The mean concentration of lead on the surface of playing equipments painted with yellow color was $3.23mg/cm^2$ and the highest among all colors, whereas equipment painted white color was non-detectable. PVC and etc materials for construction of playing equipment showed higher surface lead concentration than other materials. The result suggests that it is necessary to be taken caution of the lead exposure in the playground of apartment and it should be taken any kind of confirmative action to prevent unwanted lead exposure from surface lead source of playing equipment. Authors found that FPXRF was very reliable and useful for field measurement to detect lead on the painted surface.

• Polymer(Korea)
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• v.30 no.4
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• pp.338-349
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• 2006

Fully or nearly fully(8-cholesteryloxycarbonyl)heptanoated polysaccharide derivatives were synthesized by reacting cellulose, amylose, chitosan, chitin, alginic acid, pullulan or amylopectin with (8-cholesteryloxycarbonyl)heptanoyl chloride (CH8C), and their thermotropic liquid crystalline behaviors were investigated. Like in the case of CH8C, all the polysaccharide derivatives formed monotropic cholesteric phases with left-handed helicoidal structures whose optical pitches $({\lambda_m}'s)$ decrease with increasing temperature. Amylopectin derivative also formed a monotropic cholesteric phase with lefthanded helicoidal structures but, in contrast with the other derivatives, did not display reflection colors over the full cholesteric range, suggesting that the helicoidal twisting power of the cholesteryl group highly depends on the branched structure in amylopectin. The thermal stability and degree of order in the mesophase, the magnitude of ${\lambda}_m$ at the same temperature, and the temperature dependence of the ${\lambda}_m$ observed for polysaccharide derivatives were entirely different from those reported for the polymers in which the cholesteryl groups are attached to flexible or semiflexible backbones through flexible spacers. The results were discussed in terms of the difference in the chemical structures of the main and side chains and flexibility of the main chain.

• Polymer(Korea)
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• v.31 no.4
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• pp.356-367
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• 2007

Three kinds of amylose derivatives such as: cholesteryloxycarbonated amyloses(CAMs) with degree of esterification(DE) ranging from 1.8 to 3, (6-cholesteryloxycarbonyl)pentanoated amyloses(PAMs) with DE ranging from 0.3 to 3, and fully cholesteryloxycarbonated PAMs(CPAMs) were synthesized, and their thermotropic liquid crystalline properties were investigated. CAMs with $DE{\geq}2.6$, PAM with DE=1.6 and all the CPAMs formed enantiotropic cholesteric phases, whereas PAM with $DE{\geq}2.2$ exhibited monotropic cholesteric phases. PAM with $DE{\geq}2.2$ and CPAMs with (6-cholesteryloxycarbonyl)pentanoyl DE (DS) more than 1.0 formed cholesteric phases with left-handed helical structures whose optical pitches (${\lambda}_{m'}s$) decrease with increasing temperature. However, the ${\lambda}_{m'}s$ of these samples decreased with increasing DS at the same temperature. On the other hand, CAMs, PAM with DE=1.6, and CPAM with DS=0.3 did not display reflection colors over the full cholesteric range, suggesting that the helicoidal twisting power of the cholesteryl group highly depends on the length of the spacer joining the cholesteryl group to the main chain and DS. The thermal stability and degree of order in the mesophase observed for the amylose derivatives highly depended on DE or DS. The results were discussed in terms of the difference ul the hydrogen bond, the internal plasticization, and the decoupling of the motion of side group with the main chain.

• Science of Emotion and Sensibility
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• v.16 no.2
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• pp.195-206
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• 2013

The main causes of traffic accidents while driving a car is of the driver's visual distraction. In this study, the color sensitivity of the information projected on the windshield were evaluated for HUD (Head Up Display) system which helps the driver's eyes on the road while driving. The driving Information were projected $9^{\circ}$ downward from front sight $0^{\circ}$ under lab's fluorescent lights, LED floorlights and the TV had having 25 [lux] illumination when driving at night environment and 100,000 [lux] of daylight environment. Munsell color hue of the basic five colors (R, Y, G, B, P) and the color of traffic lights YR, W were the color of the seven characters, each character were outlined by White, Gray except for W. Total of 19 experimental stimuli was shown in the environment of day and night driving for asking visibility information of color, fatigue, preferences, and evaluate the degree of interference. The results came out that the bright Y and G color is visibility significantly for daylight. Second, with the outline of the text, the color of the outline works as a background for luminance contrast effects and affects visibility. Third, without the outline, the glass in front of the vehicle acts as the background and the luminance contrast of characters achieve greater brightness and visibility. The luminance contrast between the stimuli and background should be considered for increasing color visibility for driving information which is an important factor for HUD commercialization.

• Korean Chemical Engineering Research
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• v.44 no.6
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• pp.609-613
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• 2006

Ba2-xSrxSiO4:Eu2+ phosphor particles with the high photoluminescence (PL) intensity under long wavelength ultraviolet (UV) were prepared by spray pyrolysis. The photoluminescence, morphological and crystalline characteristics of $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles prepared by spray pyrolysis were investigated. $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles prepared by spray pyrolysis had various colors from bluish green to yellow by changing the ratio of barium and strontium of the host material. In case of x=0, the main emission peak of $Ba_2SiO_4:Eu^{2+}$ phosphor was 500 nm. In case of x=2, the main emission peak of $Sr_2SiO_4:Eu^{2+}$ phosphor was 554nm. $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles obtained by spray pyrolysis had spherical shape and hollow structure. On the other hand, the post-treated $Ba_{2-x.}Sr_{x.}SiO_4:Eu^{2+}$ phosphor particles had large size and irregular shape. The $Ba_{1.488}Sr_{0.5}SiO_4:Eu_{0.012}{^{2+}}$ phosphor particles had the maximum PL intensity after post-treatment at temperature of $1300^{\circ}C$ for 3h under reduction atmosphere.

• Cross-Cultural Studies
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• v.27
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• pp.59-79
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• 2012

China and Japan are geographically close and the two countries had shared the Chinese Character Culture and the thoughts of Confucianism, Buddhism and Taoism since the ancient age. They also actively exchanged culture in various areas. Some cultural exchanges had been caused by surrounding environment and culture had been introduced to other country in a natural way; while some cultural exchanges had been forcibly introduced through artificial process. It is believed that such cultural phenomenon must have had impact on the make-up cultures of the two countries and it was assumed that there must have been commons and differences in the make-up cultures of the two countries. This study explored the historical background of the Ching dynasty of China and the Edo Age in Japan, which are in the same time frame, and studied the aesthetic consciousness of the two countries at the time. Then the make-up style of ladies in the two countries had been studied to find out how their aesthetic consciousnesses had been expressed in the make-ups of the two countries. Then the commons and differences in make-up skills between the two countries had been identified. According to the study results, the main stream of aesthetics during the Ching dynasty in China can be classified into Confucianism aesthetics and Taoism aesthetics. On the other hand, the main stream of aesthetics during the Edo Age in Japan can be classified into "mitate(見立)", "ikki(いき)" and "garumi(かるみ). The skin care in the make-up culture of Ching dynasty in China was based on "rouge (?脂, yanzhi)" and "powder(粉, fen)". The Ching ladies loved the make-up style using rouge. It had been same both in the high society and common people. The eyebrow care was delicate and curved so that the feminine beauty with elegant spirit could be emphasized. The lips had been expressed to be smaller and the ladies tried to express elegance and reliability, rather than frail and tender feminine image. The skin care in the make-up culture of Edo Age in Japan focused on even applying of white powder so that the face would look soft. The eyebrow make-up was a very important part of the make-up. The shapes of eyebrow had been advanced in various styles and there had been eyebrow make-up styles such as "crescent-shaped brow (三日月), "crane style brow (鶴眉) and "Tang style brow (唐眉). The lips had been applied of thick red color, imitating the make-up skill of the ladies in the entertainment business. The lips make-up skill expressing the lips in two colors had been quite popular. Among the make-up skills during the Edo Age in Japan, the "black teeth (齒黑)" can be said as the most unique make-up style of Edo Age.

• The Journal of the Korea Contents Association
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• v.19 no.2
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• pp.379-392
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• 2019

Public service advertising is a form of communication activity performed to increase public interest. In order to improve the effectiveness of public service advertising, it is necessary to formulate advertising strategies that can actually induce positive action changes. China has various social problems because of dramatic social changes, which call for implementing public service advertising. This study aims to improve the persuasive effects of Chinese public service advertising by addressing effective communication strategies. In particular, we selected 33 works that use fear appeals from 2016 HuangHe Award-winning posters and analyzed their visual representation of fear appeals. The results suggest that fear appeals are frequently used in safe driving and anti-smoking campaigns. In addition, main colors of these posters were black and white. The main fearful images were often represented in a form of 'fact' and 'factual conception' and in the type of 'picture.' They also have features of implicit association' and 'exaggeration'. This study has a significance in terms of providing theoretical and empirical information to future research on improvement of public service advertising in China.