• Journal of the Korean Society of Physical Medicine
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• v.5 no.1
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• pp.15-24
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• 2010

Purpose : The purpose of this study was to investigate the effect of loading position on plantar center of pressure(COP) displacement when carrying a schoolbag during walking. Methods : Forty-four normal subjects were randomly assigned to five groups according to the method of carrying a schoolbag. The carrying a schoolbag methods were classified into five conditions: no bag (condition 1), a backpack (condition 2), a shoulder bag (condition 3), a cross bag (condition 4), a one-hand bag (condition 5). COP displacement such as anteroposterior distance and mediolateral distance of COP were measured with F-scan system. The repeated one-way analysis of variance (ANOVA) and independent t-test were used to confirm the statistical significance. Results : In the comparison of parameters of COP displacement between conditions, anteroposterior distance and mediolateral distance in the left foot and mediolateral distance in the right foot were not significantly different(p>.05), but anteroposterior diatance in the right foot was significantly different(p>.05). Between left and right foot, at condition 1 and 5 the mediolateral distance of COP was significantly different(p<.05) but anteroposterior distance at condition 1 and 5, anteroposterior distance and mediolateral distance of COP at condition 2, 3 and 4 were not significantly different(p>.05). Conclusion : These findings showed that the various loading position by five types of carrying a schoolbag didn't have influence significantly on COP displacement on during walking because of mechanism of postural adaption.

• Food Science and Preservation
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• v.8 no.3
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• pp.286-290
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• 2001

Ginger was stored in the 0.05mm and 0.08mm of PE film bags and the styrofoam box. During the ginger storage, weight losses in the PE film bags were effectively supressed than in the control bag, and storage was better in the 0.08mm PE film bag while the spoilage of ginger was higher than in 0.05mm bag. The effective storage temperature was 10$^{\circ}C$ at which was no scouting during the storage. And the perforation in the PE film bag helped the healthy ginger ratio. Single perforation of 6an diameter was good for 0.05mm film and three for 0.08mm film. When CO$_2$absorbent was added into the film bag, the spoilage and mold occurence was lowered. In the styrofoam box, the healthy ginger ratio also increased by incorporating the absorbents, but there were no great differences between activated charcoal and calcium hydroxide.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.10
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• pp.77-83
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• 2002

Magnesium alloys casting are gaining increased acceptance in the automotive and electronic industeries and die casting is the most efficient method of manufacturing such mass produced parts. This study has been investigated the microstructures and mechanical properties of Mg-9Al-lZn alloy fabricated by die casting process for development of air bag case. The microstructure of die casted specimen were composed of pro-eutectic magnesium solid solution and $\beta$(Mg17Al12) precipitates. The tensile strength of as-fabricated Mg-9Al-lZn alloy revealed 231.4MPa. It was found that Mg-9Al-lZn alloy have good corrosion resistance in electrochemical polarization test.

• The Journal of Korean Physical Therapy
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• v.22 no.2
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• pp.1-6
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• 2010

Purpose: Our study sought to investigate differences in plantar foot pressure as a function of type of pack carried and of changing weight during gait and stance. Methods: Subjects were 40 students with no disabilities. Plantar foot pressure was measured with different types of packs carried and with changing weight of the pack during both gait and stance and while changing feet. During stance while carrying a satchel on the shoulder caused a disproportionate change in plantar foot pressure. An even great imbalance occurred for plantar foot pressure during gait. Results: Using a satchel can influence diseases such as scoliosis that are caused by unbalanced muscle activation and by a disproportionate distribution of the weight of the body. Conclusion: Knowing how to use a pack correctly and how to appropriately adjust the weight of bag should be taught.

• Journal of the korean Society of Automotive Engineers
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• v.18 no.5
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• pp.1-9
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• 1996

에어백 관련기술은 차체 충돌특성 평가, 승객거동분석, 좌석벨트/조향축/에어백의 조화설계 등을 포함하는 시스템 엔지니어링 기술과 충돌감지센서, 가스발생기, 모듈 등을 포함하는 주요 기능 부품의 설계 및 제조기술로 구분된다. 이 중 시스템 엔지니어링 기술은 국내의 완성차 업계의 노력에 의하여 선진국의 수준에 근접하고 있으나 부품의 설계 및 제조기술은 매우 취약한 상황이다. 80년대 후반부터 각국의 에어백 관련 특허 출원 건수가 급증하고 있으며 새로운 기능의 부품들이 속속 개발되고 있다. 에어백 기술의 발전방향은 소형화, 경량화, 저렴화로 요약된다. 차량의 전방 충돌에 대비한 에어백이 주종을 이루고 있으나 측면 충돌에 대비한 side bag, 뒷자석 승객을 보호하기 위한 rear bag 등이 개발되고 있고 최근에는 버스 등 대형차량이나 모터사이클 등에도 에어백을 부착하기 위한 연구가 추진되고 있다. 에어백은 충돌센서(crash sensor), 가스발생장치(inflator), 공기주머니(bag), 덮개(cover), 배선(wire harness) 등으로 구성된다. 이들 중에서 공기주머니, 덮개, 가스발생장치를 결합한 부분 조립품을 모듈(module)이라고 부르고 있다. 이하에서는 에어백을 구성하는 주요 기능부품들의 종류, 특성과 기술개발 동향을 알아보기로 한다.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.1054-1055
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• 2006

Bend tests were performed at temperatures between 77 and 473K for W-19vol%Cu, W-22vol%Ag and W-19vol%(BAg-8) composites. Yield and maximum strengths and ductility of the composite were discussed in terms of microstructure and fractography. Results are summarized as follows. (1) Almost no difference was recognized in yield strength between the composites. In contrast, a large difference was recognized in maximum strength and ductility between the composites. (2) Inferior mechanical properties of W-Ag composite to W-Cu composite are attributed to heterogeneous distribution of Ag-phases, whilst inferior mechanical properties of W-(BAg-8) composite to W-Cu composite are attributed to large pores at grain boundaries.

• Journal of Mushroom
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• v.10 no.3
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• pp.115-119
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• 2012

'Gonji-5ho', a new variety of oyster mushroom, for the bag culture, was bred by mating two monokaryons isolated from 'Chiak-3ho'and 'Suhan-1ho'. In the characteristics of fruit body, pilei were thick and gray and stipes were thick, and long, and soft. It was better in elasticity and cohesivness of tissue compared to Suhan-1ho. Compared to other varieties, it was suitable to grow at higher temperature. The range of optimum temperature for the mycelial growth was around 26~29 and that for the pinheading and growth of fruit body was around $18{\sim}20^{\circ}C$. But when it was cultuered in lower than $15^{\circ}C$, growth was not uniform, culture period was longer, and stipes were uneven. In the bag culture, it was required around 18 days in incubation period and 3 days in primordia formation. The fruit body growth was vital and uniform. The yield was 221.4g/1kg bag.

• Journal of Korean Society for Atmospheric Environment
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• v.15 no.4
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• pp.417-428
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• 1999

The measurement of VOSCs(volatile organic sulfur compounds) in the air is nowadays a very important environmental research field. It is, however, very difficult because the concentration of the VOSC in ambient air is usually very low and the high reactivity makes it difficult to keep in container without loss of recovery. In this study, sampling method with cryogenic preconcentration is evaluated for analysis of atmospheric VOSC such as $CH_3SH,\;CH_3CH_2SH,\;CH_3SCH_3,\;CS_2,\;CH_3SSCH_3,\;CH_3SCH_2SCHA_3,\;and\;C_2H_5SSC_2H_5$ analyzed by GC-MS or GC-FID. Repeatabilities of measurement accompanied with preconcentration for 3-successive runs were in the range of 0.2~1.0% as a relative standard deviation. Stabilities up to 13 days were measured in 6 L canister and 10 L tedlar bag filled with VOSCs in ppb level. Higher stability was observed in tedlar bag as compared to canister with glass coated inner walls, and thiol compounds show dramatic losses in canister within 2~3 days. It is found that recovery over 70% was obtained in a week for all tested VOSCs when the compounds from ambient air matrix were stored in tedlar bag. It is also found that the stabilities of VOSCs are depending on humidity and coexisting compounds in matrix gas due to sample adsorption onto inner surface and reactivity. The results indicate the possibility and limitations of VOSC analysis in ambient air using container sampling method with cryogenic preconcentration.

• Journal of the Korea Fashion and Costume Design Association
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• v.19 no.2
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• pp.1-14
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• 2017

The consumption trend of fashion in modern industrial society is developing from the rapid changes, and the lifespan of fashion products becomes shorter due to the various industrial wastes. Due to the attitude change caused by the ethical consumption consciousness and environment awareness, the up-cycle fashion products got to receive attention, and it is in the limelight as a new trend to realize the sustainable fashion products in the domestic and foreign fashion. The purpose of this study lies in drawing the expression characteristics by investigating and analyzing the cases of each type on the fashion bag products of up-cycle brand, and contributing to the diversification of product family fitting to the characteristics of fashion bag product of up-cycle brand, systematic strategies of up-cycle fashion products, and activation of up-cycle fashion market. In research methods, the theatrical researches were conducted centered the relevant domestic literature materials, preceding papers, etc., which ran paralleled with the actual case analysis study. Through the preceding research and websites related to selected products, websites of up-cycle companies, relevant books, related articles, etc., the expression characteristics of up-cycle fashion bag products were drawn. The results of this study are as follows: First, as it has the feature of historicality, the designs can be created by containing the designer's story, story of materials, and consumer's story. Second, since it has the characteristic of sustainability, the application of manufacturing process and materials, extension of product life, conversion of original material's function, etc. can be sustainable. Third, as it's a trait of scarcity, all products may be produced by hand, and it can have the specialty which the original materials have. Fourth, since it has an eco-friendly trait, even while saving the original materials, the aesthetic needs could be met according to the consumers' continuous demand.

• Journal of Veterinary Clinics
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• v.26 no.1
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• pp.41-47
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• 2009

Ingredient analysis and the medical action of various teas are accomplished on multi angle. However, the research regarding the prevention and a treatment of oral cavity disease, which use the green tea, is still insufficient relatively. In this experiment, the virtue of green tea bag on periodontal disease was studied. This experiment was used in 11 beagles. As a test group, 6 beagles were rinsed their tooth with green tea bag. The remaining 5 beagles were rinsed with filter paper which was soaked with normal saline. The test found no statistical significance in gingival index, plaque index, calculus index and dental pocket depth. But the number of bacteria colonies decreased significantly in test groups. The periodontal disease is related to the number of bacterial colonies. Therefore, this results show that the green tea bag is effective for periodontal disease.