• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.187-192
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• 2000

The objective of this study was to investigate the problems of soft contact lens wear on the women college students. The results were as follows 1. Almost the purchase of soft contact lens was the optical shop. 2. Almost the motive of soft contact lens use was the discomfort of glasses wear. 3. Almost the good feeling of glasses wear was moderate degree. 4. On the main reason of exchange of contact lens, teens was contact lens damage and tweenths was lifespan of contact lens. 5. On the contact lens wearing time at one day, teens was over 10 hours and tweenths was from 7 hours to 10 hours. 6. On the contact care and treatment, teens was a lens washing and storage and tweenths was a lens washing and disinfectant. 7. On the main difficult of contact lens handling, teens was a lens separation in eye and disinfection of lens case and tweenths was a solution treatment and insertion of contact lens in the eye. 8. On the contact lens insertion in the eye, the most difficult item was hanging of the eyelid and fear thinking in teens and fear thinking in tweenths. 9. On the difficult in separate of contact lens wear, a most subjects were eye opening. 10. On the most inconvenient state in contact lens wearing, the subjects were eye redness, foreign body and eye pain. 11. On the advantage of contact lens wearing, teens was decrease in glasses side effects and twenties was a beauty.

• Journal of Korean Ophthalmic Optics Society
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• v.15 no.4
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• pp.355-360
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• 2010

Purpose: Analysis performance for spectacle lens which sales in domestic market and optimization design a spectacle lens which is corrected aberration. Methods: Measured center thickness, radius and aspherical surface coefficient for spherical and aspherical lenses which were ${\pm}$5.00D. Refractive index for every lens was 1.6 and they came from 4 different companies. I used 3 types of equipment to measure lenses. ID-F150 (Mitutoyo) : Center Thickness, FOCOVISION (SR-2, Automation Robotics) : Radius, PGI 1240S (Taylor Hobson) : Aspherical surface coefficient. Designed a lens which had 27 mm of distance from lens rear surface to center of eye, 4 mm of pupil diameter and small aberration on center vision $30^{\circ}C$. To shorten axial distance compared with the measured lens rise merits for cosmetic. Lens Design tool was CODE V (Optical Research Associates). Results: -5.00D aspherical lens had somewhat high astigmatism and distortion compared with the spherical lens. But it had a merit for cosmetic because of short axial height and decrease edge thickness. Improved a performance of distortion and ascertain merits for cosmetic due to short axial height and decrease edge thickness same as (-) lens in case of +5.00 aspherical lens. Though an optimization process front surface aspherical lens had a good performance for astigmatism and distortion and the merit for beauty compared with measured spherical lens. Conclusions: Design trend for domestic aspherical lens is decrease axial height and thickness to increase a merit for cosmetic not but increase performance of aberration. From design theory for optimization design front surface aspherical spectacle lens which has improved performance of aberration and merit for cosmetic at the same time compared with the measured lens. Expect an improved performance from design back aspherical lens compared with front aspherical lens.

• Journal of the Korean Applied Science and Technology
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• v.36 no.4
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• pp.1485-1495
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• 2019

The purpose of this study was to evaluate the antioxidant and anti-inflammatory effects of extracts of callus cultures, pericarp, flesh, fruit of Trapa Japonica. The toxicity of extracts from Trapa Japonica pericarp investigated using the RAW 264.7 cell showed 45.8 ± 1.5% of cell survival rate. And the results of investigation using HaCaT cells showed a 51.1 ± 1.0% cell viability at 100 ㎍/㎖ in the pericarp extract and lower cell viability at higher concentrations. The total content of polyphenol pericarp extract was 213.20 ± 15.78 mg/g, while the total content of flavonoid was 29.30 ± 3.24mg. And the total content of polyphenol callus cultures extract was 205.20 ± 18.97 mg/g, while the total content of flavonoid was 237.4 ± 7.43 mg. With a concentration level of 0.005 ~ 1000 ㎍/㎖ extract of Trapa Japonica pericarp the range of removal of 1, 1-diphenyl-2-picryl-hydrazyl (DPPH) radicals was 67.53 ± 1.5 % ~ 75.75 ± 0.5 % respectively and the range of removal of extract of Trapa Japonica callus cultures extract was also 3.1 ± 0.1 % ~ 77.32 ± 0.5 % respectively. As a result of measuring the Nitric Oxide(NO) generation amount of all Trapa Japonica extract 6.25, 12.5, 25, 50 ㎍/㎖ concentration exhibited significant (p < 0.05, p < 0.01) decreases.

• Journal of Korean Society of Forest Science
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• v.61 no.1
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• pp.69-79
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• 1983

To develope the fundamental models suitable for slope stabilization and scenic effect improvement of the roadside slopes, this study has continuously been conducted for last about 10 years through the field survey and observations on the roadside slopes of 100 plots located in the Capital region. The results obtained could be summarized as follows: 1) In general, due to unsuitable treatments and constructions to the man-made bare slope characteristics of the roadsides, the treatment aims for stabilizing and improving the scenic beauty of the slopes have not been successfully reached in the surveyed regions. 2) Particularly, because of insufficiency of the follow-up maintenance techniques to the roadside slopes treated, denudations of slope scenery established as well as the withering of the vegetation planted have been accelerated for the most part of the slopes treated. 3) 6 fundamental models for the roadside slope treatments have been developed and could be edaptable to the nation-wide purposes. The fundamental models are the model of forest scenery match plantation, roadside scenery establishment, denuded land rehabilitation, rock slope greenification, absolute stabilization, and environmental plantation belt establishment, respectively.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.4 no.2
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• pp.1-19
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• 2009

American Psychiatric Association defined hwa-byung as a unique mental illness of Korea, a kind of anger syndrome. This illness caused by the Korean culture is more often found on women than men, especially middle-aged women. The cause of hwa-byung mainly depends on the traditional family structure of Korea formed by Confucianism. Other causes that many middle-aged women suffer from hwa-byung are that their low education level originated in their wrong-recognized position in society and poverty in the past makes them not to be able to control their minds effectively(social psychological factor), and that they get stressed and depressed because of loss of their position in the family after their children leave home and the menopause which hurts their feminine beauty (physiological factor). So, this program aims at letting them to; 1) experience catharsis of the negative feelings which causes hwa-byung by expressing in psychodrama, 2) ease the symptoms of hwa-byung by relaxing their mind, 3) understand themselves through sharing their feelings and thinking at the group level, 4) acquire the opportunities to stabilize and expand their role in their real lives through the role playing.

• Journal of Korean Ophthalmic Optics Society
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• v.21 no.3
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• pp.173-179
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• 2016

Purpose: This study is to help assist in the management of optical shops by using the importance sequence of optical shop selection attributes, which is related to the consumer's selection method of consumer, and by using the importance sequence of optical shop information sources which is related to a route for optical shop selection. Methods: Customer surveys were conducted from March 10 to March 31, 2015 targeting customers who have visited an optical shop in Seoul and Northern Gyeonggi-do regions. The analys method was descriptive statistics and data were analyzed by utilizing SPSS v.10.0 statistical package program. Results: The highest ranking five attributes among the importance of optical shop selection are "friendliness and politeness of staff", "cleanliness of an optical shop", "quick resolution of customer's complaints by staff", "eyes examination and glasses dispensing skill of staff", "customer's complaints and claims handling". The lowest ranking five attributes among the importance of optical shop selection are "provide free gifts", "scale or size of an optical shop", "opening time and closing time", "convenient parking facilities", "favorable countenance of staff". The two highestr ranking criteria among the importance of optical shop information sources are "previous utilization experience", "recommendation by a relative, a friend and a family etc". The two lowest ranking criteria among the importance of optical shop information sources are "advertisement" and "spatial exterior view of optical shop". Conclusions: It is shown that the important thing in management of an optical shop is an inner caliber like ability of ophthalmic optician, interaction with customers, and previous utilization experience rather than external factors like advertisement, exterior view, and bonus gift.

• Journal of Life Science
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• v.30 no.8
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• pp.680-687
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• 2020

Several studies have proved Hovenia dulcis extracts to be an effective antidote for alcoholism, and they are frequently used in the clinical treatment of alcoholic liver disease. The purpose of this study was to investigate the anti-oxidant and anti-senescent activities of 80% methanol fractions of H. dulcis Thunberg in human dermal fibroblast (HDF) cells. The ethanol ethyl acetate fraction showed the highest inhibition of 2,2-diphenyl-1-picryhydrazyl radical scavenging (RC₅₀=3.6±0.8 ㎍/ml) as well as the highest total phenol content (417.2antiholic liver disease. Extracts from e & Tech., Sungkyunkwan University, progressed in the HDF cells, SM22 expression (p<0.001) and β-galactosidase staining intensity increased (p<0.001). An increase in SM22 expression is associated with slower aging which suggests that its expression is high in early aging. HDF treatment using the ethyl acetate fraction significantly increased production of EGF (p<0.01) and PDGF-BB (p<0.01) while SHH expression was reduced (p<0.05). These results suggest that an 80% ethyl acetate fraction of H. dulcis can suppress early aging and demonstrate the potential application of the fraction as a natural anti-senescence agent.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.37 no.1
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• pp.23-36
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• 2011

The purpose of this study is to make theoretical examinations into the makeup trend shown in digital communication environment and thereby determine potential associations of makeup trend with digital communication environment and characterize said trend, so that it can provide reference materials required for follow-up studies. This study comes to the following findings: First, it is found that there are sociocultural characteristics of digital communication environment, such as interactivity, technology-orientedness, sentiment-orientedness and mixture of time and space. Secondly, it is found that trends developed in makeup fall categorically into interactivity, virtuality, amusement and mobility. Thirdly, it is found that each type of digital communication adopts a mixture and juxtaposition of contemporary styles or categories with traditional ones through eclectic combination based on open-minded and horizontal ideas. Fourthly, it is found that a trend from digital communication environment doesn't coincide perfectly with any makeup trend, but the former trend works interactively and organically with the latter trend on the basis of homogeneity and similarity within a general framework that represents external esthetics of human being. With the creation of digital communication environment, our contemporary society forms as the complex phenomena of digital society in a combination and destruction of different categories beyond any certain international boundary, so that a hybrid tendency appears in contemporary makeup trend as well. Based on these findings, this study has its implications in the sense that it gives a new viewpoint based on design, formative characteristics and expression styles of makeup, and also provides useful reference materials for related industrial sectors.

• Applied Microscopy
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• v.35 no.4
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• pp.24-31
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• 2005

The preservative condition and ultrastructure on the mummified hair collected from newly found female mummy in Paju, were investigated by using scanning and transmission electron microscopes. The female mummy was found in september, 2002 during the traditional reburial process for the buried ones. The hair of 16th century mummy showed very intact appearances during observation with electron microscope. And the structures of the cortex, medulla and cuticle were well preserved. The cuticle layer was easily discernable, which are composed of six to seven cuticular cells. Each cuticular cells surrounded and thus seperated from its neighbors by intercellular membrane complex. In the cortex, many macrofibrils and some melanin granules between them were observed. We observed well preserved rod form macrofibrils running parallel along the direction of hair shaft. Especially, melanin granules were aggregated in the cortex which was adjacent to the cuticlu layer. As to the cause for the well-preservation of 440 year old hair sample, the presence of surface coat on the hair, which are composed of various materials. As calcium was included in the surface coat in Electron Dispersive X-ray Spectroscopy (EDS), the hardening process of the surface coat by calcium might inhibit the water or microorganism infiltration into the hair.

• Applied Microscopy
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• v.38 no.3
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• pp.195-204
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• 2008

This study was intended to identify the effectiveness of Lithospermum erythrorhizon in the UVB-irradiated mouse skin. The C57BL mice were divided into three groups; the control group, the UVB irradiated group(UVB group), and the group treated with Lithospermum erythrorhizon extracts after UVB irradiation(UVB+Le group). 10 mouses were collected and sacrificed at 24 hrs, 48 hrs, 72 hrs, 120 hrs, and 168 hrs, respectively. In the result, the transepidermal water loss (TEWL) was decreased the UVB+Le group than UVB groups by time. At the 168 hrs group was significantly lower(p<0.05). In the result, the melanin value was decreased in the UVB+Le group than UVB group, but meaningless(p>0.05). In the result of erythema index, the UVB+Le group was meaningfully lower at 24 hrs, 48 hrs, and 72 hrs group than UVB group(p<0.05). In the result of scanning electron micrograph observation, the UVB+Le group was allevited swelling than UVB group at the 24 hrs, formation of the scab at the 48 hrs, regular plate shap at the 72 hrs, new keratin observated at the 120 hrs partially, and fine fiber covered epidermis surface at the 168 hrs. In the result of transmission electron micrograph observation, the UVB+Le group was facilitation of increased lamellar bodies and reformation lamellar bodies than UVB group at the all groups. Almost all the structures were recovered at the 160 hrs group. In conclusion, Lithospermum erythrorhizon extracts may recovery on the UVB-irradiated mouse skin.