Microstructure‑Strengthening Interrelationship of an Ultrasonically Treated Hypereutectic Al–Si (A390) Alloy

Soo‑Bae Kim,Young‑Hee Cho,Jae‑Gil Jung,Woon‑Ha Yoon,Young‑Kook Lee,Jung‑Moo Lee 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6

Ultrasonic melt treatment (UST) was applied to an A390 hypereutectic Al–Si alloy in a temperature range of 750–800 °Cand its influence on the solidification structure and the consequent increase in strength was investigated. UST at such a hightemperature, which is about 100 °C above the liquidus temperature, had little effect on the grain refinement but enhanced thehomogeneity of the microstructure with the uniform distribution of constituent phases (e.g. primary Si, α-Al and intermetallics)significantly refined. With the microstructural homogeneity, quantitative analysis confirmed that UST was found tosuppress the formation of Cu-bearing phases, i.e., Q-Al5Cu2Mg8Si6, Al2Cuphases that form in the final stage of solidificationwhile notably increasing the average Cu contents in the matrix from 1.29 to 2.06 wt%. A tensile test exhibits an increasein the yield strength of the as-cast alloy from 185 to 208 MPa, which is mainly associated with the solute increment withinthe matrix. The important role of UST in the microstructure evolution during solidification is discussed and the mechanismcovering the microstructure-strengthening interrelationship of the ultrasonically treated A390 alloy is proposed.

Effect of Ultrasonic Melt Treatment on Solidification Microstructure of Al–5Ti–1B Alloy Containing Numerous Inoculant Particles

Soo‑Bae Kim,Jae‑Gil Jung,Young‑Hee Cho,Su‑Hyeon Kim,Kwangjun Euh,Jung‑Moo Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

The effect of ultrasonic melt treatment (UST) on the solidification microstructure of an Al–5Ti–1B alloy containing highvolumefractions of Al3Tiand TiB2particles is investigated for various UST times with different melt holding times. Theas-cast Al–5Ti–1B alloy is composed of TiB2and polygonal Al3Tiparticles (present prior to UST), plate-like Al3Tiparticles,and Al grains (formed during UST and/or solidification). The UST causes a size reduction and homogeneous distributionof the TiB2-agglomerated region containing many submicron-sized TiB2particles pushed to the grain boundaries. The USTslightly decreases the size and improves the distribution of polygonal Al3Tiparticles enriched in the TiB2-agglomeratedregion. Unlike the TiB2and polygonal Al3Tiparticles, which exhibit a minor refining effect, the plate-like Al3Tiparticlesshow a significant refinement with UST application. The UST has a significant effect on the size distribution of Al grains byinducing the formation of medium-sized grains at the expense of small and large grains; however, it only has a slight effecton grain refinement. The degree of microstructure modification increases with increasing UST time but decreases with meltholding time after UST. The mechanisms for the refinement and dispersion of the TiB2and Al3Tiparticles and Al grains arediscussed considering fragmentation, nucleation, and growth behaviors induced by the UST and subsequent solidification.

관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

한-러 관계의 변화 : 1990~2000년까지를 중심으로 1990~2000

배수환 서라벌대학 2002 논문집 Vol.21 No.-

세탁기시장에서의 소비자피해 실태 및 소비자요구에 관한 연구

배순영,박수경 기전여자대학 1996 論文集 Vol.16 No.-

This study examined the consumer needs on an electric washing machine market. For this purpose, survey was conducted using questionaire. The data included 321 women living om Seoul. Statistics analyses were conducted using frequencies, percenties, mean, ANOVA. The major findings were consumers require improvement about economizing function of washing machine and a catalog and a sales networks. Therefore, economizing function should be better and a catalog should be detailed and a discount store should be enlarge.

불안정한 지지면에서의 평형 훈련이 편마비 환자의 균형 능력에 미치는 영향

배수찬,김근조,윤홍일 대한정형물리치료학회 2001 대한정형도수물리치료학회지 Vol.7 No.2

The purpose of this study was to investigate the balancing training effect on weight bearing ratio and postural sway on the unstable surface for the CVA patients with balance disability. The inclusion criteria were walking independently 20m distances. Eighteen subjects, 4 with right and 14 with left hemiplegic patients were participated in this study. The range of age was from 35 to 75 and the duration from onset time was from 1 to 38 months. The intervention program including balancing training that they were introduced for 10 minutes every other day during 12 weeks to experimental group, and general therapeutic exercise to control group. The result of this study were as following: 1. The balancing training on the unstable surface showed that the postural sway of left/right distribution would appear more effective on sitting with eyes opened. 2. The balancing training on the unstable surface showed that the postural sway of forward/rear distribution, left/right distribution and distance would appear more effective on standing with eyes opened. 3. The balancing training on unstable surface would increase more effective on the weight-bearing ratio of left/right difference and frequency. 4. The balancing training on unstable surface was statistical significant on the postural sway of left/right distribution and area in experimental group, and it was statistical significant on the postural sway of forward/rear distribution, left/right distribution and distance in control group, too.

Helicobacter pylori 항원을 이용한 면역우유 생산 및 항체특성에 관한 연구

배만종,김수정,예은주,김병기,박창호,김미경 경산대학교 생명자원개발연구소 2003 생명자원과 산업 Vol.7 No.-

본 연구는 위염, 위궤양, 위림프종 및 위암과 같은 소화기 질환의 원인균으로 알려진 Helicobacter pylori균을 항원으로 하여 젖소에 면역시킨 후 생산된 우유의 anti-H. pylorigkdcp의 생성능을 검토하고, 백신투여량과 항체 생성과의 관계, 항원 항체의 특이성, H. Pylori균 응집력, 항체의 산과 열에 대한 안정성, 그리고 백신투여가 젖소에 미치는 영향을 알아보았다. 1. 백신 투여량에 따른 혈청과 유청내의 anti-H. pylori항체의 함량은 10㎖, 20㎖, 30㎖ 백신투여 모든 군에서 대조구에 비해서 높은 양의 항체 생성을 확인하였다. 유의적인 차이는 없었으나 20㎖투여가 항체 생성이 가장 많은 것으로 조사되었다. 백신 투여량에 따른 유청내의 anti-H. pylori항체 생성량은 혈청에서 나타난 결과와 유사한 양상으로 형성되었다. 2. Anti-H. pylori항체의 SDS-PAGE에 의한 분자량측정 결과 heavy chain은 50kDa정도, light chain은 24kDa정도로 확인 되었다. 3. H. pylori항원 단백질의 분자량측정 결과 12개의 band가 형성되었다. Anti-H. pylori의 항원 특이성을 알아보기 위해 western bloting을 한 결과 혈청, 혈청정제, 유청, 유청 정제 모두 7개의 항원성 물질을 확인할 수 있었고, 주 항 원성 물질은 분자량이 97, 66, 34kDa 이었다. 4. 응집반응결과 유청속의 anti-H. pylori항체가 H. pylori균에 대해 1/10의 응집가를 나타내었다. 5. Anti-H. pylori항체의 산·알칼리에 대한 안정성 실험에서는 pH 5 ∼ pH 10 범위에서 안정한 상태로 100%의 활성을 나타내었다. 6. Anti-H. pylori항체의 열에 대한 안정성 실험에서는 60℃에서 60분간 안정한 상태를 보였고, 70℃에서도 비교적 안정한 상태였으나 60분 경과후 40%정도 활성이 감소하였다. 80℃에서는 4분간 처리했을 때 77%의 활성을 유지하였고, 100℃에서도 1분간은 비교적 안정한 상태였다. 7. 백신투요로 인하여 유량이 12% 감소하는 경향을 나타냈고, 최장 1주일 정도 지나면서 회복되었다. 8. 백신투여 후 젖소의 체온을 측정한 결과 대조구에 비해 정상적인 범위 내에서 체온이 상승하는 경향을 나타내었다. This study has been to examine bio-function of anti-H. pylori antibodies of milk produced from cows immune with antigen germ of Helicobacter pylori and search the relation between vaccine dosage volume and antibody formation, peculiarity of antigen antibody, cohesion of H. pylori germ, stability about add and heat of antibody, and impact of vaccine dosage on cows. The content of serum and Anti-H. pylori antibody within whey in accordance with vaccine dosage volume has confirmed the formation of high-quantified antibody compared to the controlled conditions in all groups vaccine dosages of 10㎖, 20㎖, and 30㎖. It has been turned out that the antibody was farmed most in 20㎖ dosage on while there was no attention difference. The molecular weight of Anti-H. pylori antibody measured by SDS-PAGE were turned out as about 50kDa in the heavy chain and about 24kDa in the light chain. 12 bands were formed as the result of measured molecular weight of antibody protein. The western blotting was performed in order to examine the antigen peculiarity of Anti-H. pylori that all 7 antigen substances including serum, serum refining, whey and whey refining could be confirmed and the main antigen substances were 97, 66, 34kDa of molecular weight. As a result of cohesive response Anti-H. pylori antibody in whey showed 1/10 cohesive rate about H. pylori germ. In stability test about acid and alkali of antibody there was 100% activated in the range of pH 5-pH 10. In stability test about heat it showed stable condition in 60℃: for 60 minutes and comparatively stable condition in 70℃, but reduced activation to 40% after 60 minutes. It maintained 77% activation in 80℃ for 4 minutes and comparatively stable in 100℃ for I minute. It was inclined to reduce to 12% of flow caused by vaccine injection, but recovered after about maximum 1 week. In measurement of body temperature of cows after vaccine injected, it was inclined to rise with the normal scope in comparison with the controlled conditions.

民族의 幸福과 發展이 保障되는 統一

裵壽鎬 경북대학교 평화문제연구소 1986 평화연구 Vol.11 No.-

"King Lear"에 나타난 복식 이미져리 硏究

배수정,김옥진 全南大學校家政科學硏究所 1993 生活科學硏究 Vol.3 No.-

The aim of this article is to make a better stage costume by reviewing and analyzing that of King Lear by Adrian Noble with applying clothing imagery to this play. In a way of research, the clothing imagery is to be studied at first, and then, with it being compared the clothes actually worn by Adrian Noble. The clothes in King Lear represent the values of society, of status quo, of an socially conceived external morality, while nakedness is the traditional image of unadorned truth. The madness of King Lear and the lost of throne is shown in nakedness by taking off King's clothes one by one. In Edar's case, the process of restoring his positions and regaining his identity was revealed in taking a better clothes. The rise of status in Edmund was symbolized by changing from commons to more gorgeous clothes. The stage costume of King Lear at Stratford in 1993 is limited in use of ornaments and colors, and transformed into a very simple one, and also designed to easily understand the personal relationship by attaching main colors to similar personality group. In the early part, the costume of Lear was changed from formal suits of shirts, veste and trousers and coat to shirts, veste and trousers, and he was falled into a distressful mental state with his button of veste opened, and thereby he was in wearing only shirts and trousers by stripping veste. Eventually Lear go in madness by being decorated with weeds with buttons of shirts opened. This corresponds with thr dramatic meaning that Lear gains his mental awareness while undergoing materialistic loss. The clothes of Edgar was formal suits of shirts, trousers, veste and coat as he was a noble, and he was in a state of wearing only branket when disguised as a poor Tom. When disguised as a farmer he was wearing only ragged trousers and long shirts and was same in clothes as a knight. This seems that the process of wearing a clothes of knight was treated as suggestive and abridged in showing the play. The clothing imagery of King Lear by Adrian Noble showed simple and modern styled clothes, contrasted with that of Shakespearean period. And it corresponds with the dramatic meaning basically. This play also shows a production technique that was planed to express the suggestive imagery without change of clothes by a abridged production technique and therby deliver the intention of Shakespeare to the spectators.

서울시내 일부 여대생의 피부건강관련 변수와 피부건강행위와의 관계 연구

배수현,문인옥,김연희 韓國保健敎育.健康增進學會 2003 보건교육건강증진학회지 Vol.20 No.1

The purpose of this study was to analyze the relationships between variables related to skin health and skin health behavior of female university students in seoul, and to plan effective educational programs for skin health. 322 university women attending women's universities and 363 university women attending co-educational universities were selected to conduct a questionnaire survey; the total number of examinees was 685, and the examination period was from October 23rd to November 6th, 2002. The study results are as follows; 1. The score distributions of skin health behavior were as fallows; 8.7% of examinees got 20-40 points, 51.6% got 41-60 points, 36.7% got 61-80 points, 0.4% got 81-100 points. The maximum score was 100 points; the lowest score was 22 points and the highest score was 97 points, the average score was 56.9 points. 2. The general characters were as follows; the older subjects were and the higher subjects income levels were : the higher their scores of skin health behavior were. Scores of skin health behavior of students who temporarily stay out of school were higher than those who were enrolled full time. Scores of skin health behavior of university women attending women's universities were higher than those of university women attending co-educational universities. The greater subjects were satisfied with their appearances, the better their health states were, the more subjects were concerned about health problem, the higher their scores of skin health behavior were. 3. Characters related to skin were as follows; the better subjects skin conditions were, the higher their scores elf skin health behavior were. Scores of skin health behavior of university women whose skin types were 'sensitive' were higher than those of university women whose skin was "t sensitive"Score of skin health behavior of university women who worry about their skin wrinkles or skin color were higher than those of university women who have different kinds of skin troubles. Scores of skin health behavior of university women who get skin-related information through dermatology clinics or beauty salonspecialists in this area were higher than those of university women who get the information through other sources. Scores of skin health behavior of university women who have experienced adverse effects of beauty products were higher than those of university women who have not experienced adverse effects of beauty products. 4. The relationships between variables related with skin health and skin health behavior were as follow Skin states, health status and health concerns all had statistically significant correlation with skin health behavior.