• Korean Journal of Fisheries and Aquatic Sciences
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• v.24 no.2
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• pp.89-98
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• 1991

Food habits of Sand eel, Ammodytes Personatus, in the costal waters, Shinsudo, Samchunpo, was studied from March to May, 1988. Main food item was Calanus sinicus. Although food diversity increased with age, evenness decreased with age. Importance indices of food items of Paracalanus Parvus and Corycaeus latus were high in younger age. But that of sagitta crassa and Gammaridae were high in older age. As while, that of Ca. sinicus was very high in every age. Food items of A. personatus were equal to all groups except 0.5 month group because it had the complete digestive tract after 1.5 month group.

• Journal of the Korean Applied Science and Technology
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• v.29 no.1
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• pp.95-101
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• 2012

To manufacture of a completely biodegradable and compostable biomass -based blend polymer film, two types of cellulose acetates(DS=2.4 and DS=2.7) were blended with 5 - 50 wt% of low average molecular weight polylactide(PLA) by mixing each polymer solution having same viscosity in 10 wt% methanol/dichloromethane. Their surface morphology, thermal and mechanical properties were studied. The chemical structures of blend films were confirmed by the fourier transform IR spectroscopy with attenuated total reflection(FT-IR ATR) spectrophotometer. Scanning electron microscope(SEM) photos of blend films of both CAs with less than 5 % of PLA showed homogeneous morphology. On the contrary, the other blends with higher than 20 wt% of PLA content showed a large phase separation with spherical domains. The thermal property of blend films was also analyzed with thermogravimetric analysis(TGA) and differential scanning calorimeter(DSC). The tensile strength of CA/PLA blend films was increased up to $820kg_f/cm^2$ for TAC/PLA and $600kg_f/cm^2$ for DAC/PLA.

• Korean Journal of Food Science and Technology
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• v.27 no.6
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• pp.1028-1034
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• 1995

Acid-modified and cross-linked chestnut starch properties and their gel properties were examined. Hardness and cohesiveness of acid-modified starch gels were all reduced as acid treatment time was increased. And hardness of crossed-linked starch gels were increased but cohesiveness were not significantly different. Reduction rate of transmittance in acid-modified starch suspensions were higher than that of unmodified starch suspension. Hardness changes of cross-linked starch gels during 4 days of storage were little, especially in the gels made at $75^{\circ}C\;and\;85^{\circ}C$ of heating temperatures.

• Journal of Conservation Science
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• v.26 no.4
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• pp.361-370
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• 2010

The open pore of stone cultural heritage is not expected to have an effect only by consolidation, and it has a drawback that only the internal wall adheres and gets consolidated due to the incrase of liquidity caused by the low viscosity and difference of materials in the case of filling with high molecules synthetic resins. Therefore, this research selected the effective filler for Three-storied Stone Pagoda at the West of Gameunsaji Site through the verification of filling effects of materials using the information about various fillers based on minerals. As the result of filler experiment, got filled with the combination of KSE 500 STE + KSE Filler A${\cdot}$KSE Filler B that is the same as the Member or has very similar properties. The total surface area of the west stone is $252.6m^2$ and the area where the internal opening has been developed is $17.77m^2$(7.03%) requiring a task that fills the internal($24,885m{\ell}$).

• Journal of Biomedical Engineering Research
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• v.18 no.4
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• pp.467-476
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• 1997

This paper presents a designing of a digital hearing aid processor (DHAP) chip being operated by a dedicated DSP core. The DHAP for hearing aid devices must be feasible within a size and power consumption required. Furthermore, it should be able to compensate for wide range of hearing losses and allow sufficient flexibility for the algorithm development. In this paper, a programmable 16-bit fixed-point DSP core is employed thor the designing of the DHAP. The designed DHAP performs a nonlinear loudness correction of 8 frequency bands based on audiometric measurements of impaired subjects. By employing a programmable DSP, the DHAP provides all the flexibility needed to implement audiological algorithms. In addition, the chip has low-power feature and $5, 500\times5000$$\mu$$m^2$ dimensions that fit for wearable hearing aids.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.5
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• pp.817-823
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• 1996

The rheological prouerties of dough were evaluated the dough added whole wheat flour during breadmaking. From the farinogram, water absorption of the dough was decreased as the amount of coarse whole wheat flour was increased. While water absorption of the dough was increased as the amount of fine whole wheat flour was increased. Arrival time and development time of the dough with coarse whole wheat flour were longer than those of fine whole wheat flour. As the amount of whole wheat flour was increased, the weakness was increased. Weakness of coarse whole wheat flour was higher than that of fine whole wheat flour. From the extensograph, extension and resistance to extension were decreased with increasing the amount of whole wheat flour. Resistance to extension of coarse whole wheat flour was higher than that of fine whole wheat flour. From the amylograph, as the amount of whole wheat flour increased, maximum viscosity was decreased gradually. Though the amount of coarse whole wheat flour and fine whole wheat flour was increased up to 30% and 50%, respectively, external characteristics of bread was remained in normal. As the amount of whole wheat flour was increased, the value of whiteness was decreased.

• Polymer(Korea)
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• v.32 no.3
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• pp.213-218
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• 2008

About 17% of historical properties in Korea were made of stones and most of them are exposed to weathering, as such that discoloring, cracking, and shattering occur from physical, chemical, mechanical, and biological effects due to outdoor placement. Proper treatments for conservation are necessary to prevent the weathering damage and to retain the original shape of stones. MMA, an acrylic monomer having low viscosity can be impregnated deep inside stones by consecutive compression and decompression process in a pressurized vessel. After the polymerization of MMA impregnate, the space inside of the stone was filled with PMMA. It is expected that water repellent and weather resistant properties will be improved because of the improved bonding of constituent materials in stones. In this study, moisture absorption, chemical resistance, and mechanical property of two domestic granites were examined after treating them with MMA for the purpose of determining the conservation value of this method that was possibly useful to the conservation of stone cultural assets.

• Korean Journal of Food Science and Technology
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• v.20 no.2
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• pp.236-244
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• 1988

The characteristics of ice cream, such as type-keeping viscosity, turbidity and stability of emulsion, were studied with the different composition of fatty acid of monoglyceride. The effect of saturated fatty acid of monoglycerides such as monolaurin, monomyristin, monopalmitin and monostearin on the characteristics of ice cream did not show any difference. The unsaturated fatty acid of monoglycerides, however, such as monocaprin and monoolein, was drastically enhanced the viscosity and easily happened the overrun of ice cream mixture which were resulted in the condensation of the fat droplet. Also the condensed fat droplet had the sterical network-structure. When the ratio of monostearin and monoolein becomed about 30:70, especially, it was confirmed the curdling of fat sphere increase to a maximun so that type-keeping and heat stability of ice cream were improved.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.52-52
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• 2011

PLA 섬유는 폴리머의 주성분이 옥수수에서 추출한 모노머를 중합한 화학섬유가 아닌 인체친화적인 식물성 소재이며 생분해성이 좋은 친환경 소재로 최근 주목받고 있는 섬유소재이다. 본 연구에서는 아토피완화용 여러 섬유 구조체 개발에서 사용되는 섬유소재중 PLA 원사에 항균성 물질을 혼입하여 PLA 항균사 제조를 위한 연구를 수행하였다. PLA Grade의 점도가 낮아질수록 Grade별 용융 지수값은 차이를 나타내지만 방사온도 $230^{\circ}C$를 변곡점으로 하여 용융점도가 급격히 변하였으며, 특히 방사온도 $240^{\circ}C$의 경우 용융지수가 100을 넘어가고 폴리머의 색깔이 황갈색을 띄어 폴리머의 열분해가 많이 일어났을 것으로 판단되었다. PLA의 적정 방사온도 구간은 $210{\sim}225^{\circ}C$ 구간이 최적이며 그 이상에서는 Color 변화 및 물성 저하가 나타나는 것으로 판단되었다. 항균성 PLA 섬유를 제조하기 위하여 피톤치드계 유기항균제를 이용하였으며, 피톤치드에 기능성 엘라스토머를 사용하여 Capsulation을 진행하였다. 이러한 유기항균제 Powder의 경우 비중이 낮아 표면적로 인하여 마스터배치 칩을 만드는 공정에서 잘 혼합되지 않는 문제점이 발생하였으나, 피톤치드의 함량을 조절하여 PLA와의 마스터배치 칩 제조를 시험하였다. 압출온도와 토출량, Screw 조건(Mixing, Zone)을 시험하여 적정 조건을 설정하였다. 항균사 PLA 섬유는 Sheath/Core 복합방사 형태와 단독사 형태의 2가지 Type을 제조하였다. Sheath/Core 복합방사 폴리머 구성은 Sheath부에 PLA항균사, Core부에 PLA 또는 저융점 PET를 사용하였다. Core부의 폴리머는 제사성에 큰 영향을 미치지 않았으나, 항균 마스터배치의 함량이 증가할수록 Pack압 상승이 급격히 일어나는 단점이 나타났다. 항균제 5% 정도가 혼입되어 있는 경우에 2.1 이상의 정균활성치와 99.8% 정도의 정균감소율 성능을 나타내었다. PLA 단독사의 경우, 항균제 최적 함량은 3% 이상으로 정균활성치 5.5 이상, 정균감소율 99.9%의 우수한 항균특성을 나타내었다.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.645-652
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• 2021

This paper analyzed the so-called 'Honey Butter Almond case', which became a hot topic by showing that the packaging design of a product can be distinguished as a recognizable trademark, not just a pattern. In the judgment, the issue was whether the discrimination power of the registered trademark and the similarity to the previously used trademark. First of all, with respect to the discrimination power of the registered trademark, the court said that the package front figure functions as an identification mark of the source, as long as the specificity of the expression method and overall composition are distinct from the commonly used. And the court said that it is difficult to say that the dominant impression is similar to the previously used trademark (the snack 'Honey Butter Chip') in terms of its name and idea. This case is acknowledging the function of the packaging design as a product label, and also acknowledging it can acquire identification as a distinctive trademark through the uniqueness of its composition and expression method.