• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2003년도 정기총회 및 학술대회
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• pp.83-86
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• 2003

With the opening of digital broadcast services and development of wire/wireless Internet, the current multimedia broadcasting is provided for has various services. The user will be provided lots of various content through the various channel and media. Content provider and consumer want the various service using content with the better quality which is fit to user preference. For transmitting this content in the limited transmission channel capacity, it needs to transmit the highly compressed content which user wants. The content of 3D mesh model-based on MPEG-4 enables the various content service that provides the lower capacity and the better quality, and Targeting service enables just provide the contents that user more wants and likes. The adaption of Java application program and 3D program can provide the content service utilizing 3D mesh model, so content provider and consumer can share the more information about the content. This paper has presented the study on the targeting service using compression of 3D mesh model-based on MPEG-4 and the adaptation of Java application program using it

• 한국식생활문화학회지
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• 제22권6호
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• pp.820-826
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• 2007

Different types of bap(cooked rice) was cooked using barley or/and SoRiTae with rice as the base. Total(TS), rapidly digestible(RDS), slowly digestible(SDS) and resistant(RS) starch fractions were determined. Other physicochemical properties such as moisture, protein, amylose contents, protein digestion in vitro and color values as well as sensory properties of different bap were also investigated. Cooked rice with SoRiTae(RiSo) showed the highest moisture content of 63.9%, whereas other bap showed simillar content ranging from 62.3-63.0%. Crude protein content of RiSo was the highest, while that of cooked rice(Ri) was the lowest(p<0.05). Amylose content of RiBa was the highest, while that of RiSo was the lowest(p<0.05). In in vitro protein digestibility(IVPD), cooked rice with barley and SoRiTae(RiBaSo) was the highest, while Ri was the lowest, showing no significant difference at p<0.05. In starch fractions, as barley or/and SoRiTae were added to rice, a decrease in RDS content and increases in SDS and RS contents were observed. In addition, starch digestion index(SDI), which derived as an indicator of their in vitro starch digestibility and rapidly available glucose(RAG) value, which determined as a predictor of potential glycemic response decreased. A decrease in L value from RiSo and RiBaSo, which comprised of SoRiTae and increases in a and b values in RiSo and RiBa were observed, respectively. All sensory parameters involving color, glossiness, sweet taste, wetness, roughness, hardness and stickiness were shown to be a significant difference except sweet taste among different bap(p<0.05). L value of instrumental characteristic was negatively correlated with color of sensory characteristic and a value was positively correlated. Significant negative correlation was found between RS content and glossiness, however, positive correlation with roughness and hardness, respectively. These results suggested that cooked rice mixed with barley and SoRiTae contain significant RS and SDS contents and may improve diabetes and hyperlipidemia, due to the lowering RDS and RAG, respectively.

• 한국대기환경학회지
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• 제26권1호
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• pp.94-102
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• 2010

Water content of $PM_{2.5}$ (particles in the atmosphere with a diameter of less than or equal to a nominal $2.5{\mu}m$) was estimated by using a gas/aerosol equilibrium model, SCAPE2, for the particles collected at Seoul and Gosan, Korea. From measured and analyzed characteristics of the particles, the largest difference between Seoul and Gosan is the proportions of total ammonia (t-$NH_3$=gas phase $NH_3$+particle phase ${NH_4}^+$), total nitric acid (t-$HNO_3$=gas phase $HNO_3$+particle phase ${NO_3}^-$) and sulfuric acid ($H_2SO_4$). Even though both sites have sufficient t-$NH_3$ to neutralize acidic species such as $H_2SO_4$, t-$HNO_3$, and t-HCl (total chloric acid=gas phase HCl+particle phase $Cl^-$), equivalent fraction of t-$NH_3$ and t-$HNO_3$ are higher at Seoul and $H_2SO_4$ is higher at Gosan. Based on the modeling result, it is identified that the $PM_{2.5}$ at Seoul is more hygroscopic than Gosan if the meteorological conditions are the same. To reduce water content of $PM_{2.5}$, and thus, mass concentration, control measures for ammonia and nitrate reduction are needed for Seoul, and inter-governmental cooperation is required for Gosan.

• 한국식품영양과학회지
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• 제25권1호
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• pp.39-45
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• 1996

The study was performed to investigate the effects of administration of aluminum compound in Kidney metabolism and plasma hormone of rats. Seventy frve male Sprague-Dawley strains rats were divided into five groups consisting of the control, 250ppm AlCl$_3$group, 500ppm AlCl$_3$ group, 250ppm $Al_2$(SO$_4$)$_3$group, 500ppm $Al_2$(SO$_4$)$_3$group and kept on the diet for 2 weeks. The body weight gain was increased by the administration of AlCl$_3$ but decreased by the administration of $Al_2$(SO$_4$)$_3$as compared to the control. The urinary excretion of sodium and creatinine were increased and free water clearance and urine volume were decreased significantly after AlCl$_3$adminstration group as compared to the control. The water balance, free water clearance, excretion of sodium and creatinine were increased and the excretion of chlorine was decreased after $Al_2$(SO$_4$)$_3$ administration as compared to the control. Plasma renin activity was increased and plasma aldosterone content was compared to the control. Plasma renin activity was increased and plasma aldosterone content was significantly decreased after adminstration of aluminum compounds as compared to the control.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2001년도 춘계 학술발표논문집
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• pp.171-174
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• 2001

식물의 대사과정을 통하여 흡수된 대기오염물질은 많은 단계의 해독과정 거치게 된다. SO$_2$ 의 경우는 세포질에서 그 대부분이 SO$_{3}$$^{2-}$ 로 용해되고 일부는 HSO$_{3}$ $^{-}$의 형태로 용해된다. 용해된 SO$_{3}$$^{2-}$ 는 아황산산화효소에 의해서 엽록체에서 생성된 $O_{2}$$^{-}$와 산화 반응하여 비교적 독성이 낮은 SO$_{4}$$^{2-}$ 로 변화한다.(중략)

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2012년도 춘계학술발표대회논문집
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• pp.123-126
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• 2012

In general, there are 3 subjects of discussion in education field; namely past, present and future. Related with those facts, there is several information or knowledge that relatively hard to be presented in the real world. In this matter, digital content shows its contribution especially in the education field. Digital content can virtually represent the information or knowledge that seems to be difficult to be visualized in the real world before. In this project, researcher develops a mobile device's application that consist the skeleton's 3D virtual content. This application is expected to solve the above explained problem that usually appears during learning human skeleton in senior high-school's biology class. Besides, the application of digital content will make the learning process become easier because the student will have a visual learning tool. Last, the mobile device that is used in this prototype has offer an important beneficial namely mobility beneficial, so that the user can access the content anytime and anywhere.

• Composites Research
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• 제25권4호
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• pp.110-116
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• 2012

최근 대규모 토목구조물의 내구성 향상 및 수화열 저감 성능을 확보하기 위하여 1종 보통포틀랜드시멘트에 고로슬래그미 분말 및 플라이애시를 혼합 치환한 삼성분계 혼합시멘트(TBC)의 개발 및 현장적용이 증가하고 있다. 또한 최근 건설사를 중심으로 공사비용 절감 등을 이유로 공사기간 단축 노력이 계속되고 있다. 이를 위해 콘크리트의 조기강도 성능이 요구되어진다. 따라서 상대적으로 조기강도 발현이 느린 TBC의 성능 보완이 필요하다. 이 연구에서는 TBC 모르타르의 조기강도 발현 성능을 향상시키기 위한 노력으로, 고로슬래그미분말 및 무수석고의 분말도와 첨가율을 조절하여 모르타르의 압축강도, $SO_3$ 함량 및 SEM 분석을 실시하였다. 실험 결과, TBC 모르타르는 분말도 약 $4,200cm^2/g$의 고로슬래그미분말을 사용하고 분말도 약 $10,000cm^2/g$의 무수석고 3.5%를 첨가하고 $SO_3$함량을 3.72% 내외로 관리하는 것이 가장 우수한 조기강도 특성을 보이는 것으로 나타났다.

• 한국세라믹학회지
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• 제12권4호
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• pp.3-8
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• 1975

Hydration processes of the rapid hardening cement clinkers, which were synthesized from domestic alunite for major alumina source, limestone, kaolin and fluorite, were investigated by means of x-ray diffraction analysis, thermal analysis and microscopic observation etc. The clinkers were composed mainly of alite, calcium fluroaluminate (C11A7.CaF2) minerals. While the hydratio processes of the clinkers are altered by concentration of SO3 in the paste, calcium aluminate hydrates such as C4AH13, CAH10 and calcium monosulfate hydrate (C3A.CaSO4.12H2O) are formed at first and then some of them are transformed into ettringite(C3A.3CaSO4.32H2O) within 30~60 min. when the concentration of SO3 in the paste are enough. However the formed ettringite are changed slowly into calcium monosulfate hydrate as the concentration of SO3 become lowered, and the paste is hardened with these close-packed minerals. When the content of SO3 in clinker is so enough, calcium sulfoaluminate hydrates are found without any addition of anhydrite or hemi-hydrite.

• 농업과학연구
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• 제7권1호
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• pp.38-43
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• 1980

곰솔, 개잎갈나무, 주목 등의 조원수목(造園樹木)에 있어서 $SO_2$가스 피해(被害)에 의한 ethylene 발생(發生) 및 에 의한 ethylene 발생억제효과(發生抑制效果)를 조사(調査)하고 아울러 $SO_2$ 가스 처리종료후(處理終了後) 엽(葉)의 유황함량(硫黃含量)을 분석(分析)하였던 바 다음과 같은 결과(結果)를 얻었다. 1. 곰솔과 개잎갈나무에서는 $SO_2$ 처리(處理) 2일후(日後)에 가장 많은 ethylene 발생량(發生量)을 보였으나 주목은 처리(處理) 4일후(日後)까지도 계속 증가(增加)하였다. ethylene 발생량(發生量)은 곰솔에 비(比)하여 개잎갈나무와 주목에서 현저(顯著)히 많았으며 곰솔과 개잎갈나무에서는 가시적(可視的) 피해반점(被害斑點)이 나타나기 전(前)에 많은 양(量)이 발생(發生)하였으나, 주목에서는 피해반점(被害斑點)이 나타난 후(後)에 다량(多量)이 발생(發生)되었다. 2. Ag ion은 $SO_2$ 가스 처리전(處理前)의 잎이나 처리후(處理後) 피해엽(被害葉)에 살포(撒布)한 경우 모두 ethylene 발생(發生)을 현저(顯著)히 억제(抑制)시켰으며 100ppm의 $A_gNO_3$ 용액(溶液)을 살포(撒布)했을때 가장 효과(效果)가 컸다. 3. 잎의 유황함량(硫黃含量)은 무처리구(無處理區)에 있어서는 수종간(樹種間) 차이(差異)가 크지 않았으나 $SO_2$ 가스 처리후(處理後)에는 주목에 비(比)하여 곰솔과 개잎갈나무에서 다소(多少) 높은 함유량(含有量)을 보였다.

• 한국세라믹학회지
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• 제22권3호
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• pp.60-66
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• 1985

The formation mechanism of unstable alkali and its existing states in the clinker were studied. The relation of unstable alkali content vs. other water-soluble components porosity and the distributionof potassium were investigated. The results are as follows :1) Two states of unstable alkali seem to exist in clinker ie compounds of $K_2O-Al_2O_3$ system and free $K_2O$ 2) The content of water-soluble $Al_2O_3$ tends to increase with increase of unstable alkali content, 3) Most of alkalies in clinker are concentrated in liquid phase at high temperature. Therefore it is possible to make various $K_2O-Al_2O_3$ system compounds according to the content of $K_2O$ in the liquid phase of clinker. In this experiment we found out a $K_2O-Al_2O_3$ compound of high $Al_2O_3$ content (34%) and high $K_2O$ content (33%) in clinker with 1.09% unstable alkali. 4) The porosity of clinker tends to increase with increase of unstable alkali content. 5) The amount of trapped alkali vapor may increase in closed pore in the clinker with high alkali and low $SO_3$ condecent. Therefore free $K_2O$ is the condensed alkali on the wall of closed pore in the clinker.