하나로 조사시험용 다공 원통헝 구조물의 온도해석

최영진,강영환,이영신,Choi Young-Jin,Kang Young-Hwan,Lee Young-Shin 한국전산구조공학회 2004 한국전산구조공학회논문집 Vol.17 No.4

재료나 핵연료조사시험에서 다공원통형구조물의 모든 구성품에서 감마열 및 fission과 같은 열원이 발생한다. 본 연구는 조사시험중 다공원통형구조물의 열적건전성을 평가하기 위해 온도분포에 대한 일반해를 구하는데 그 목적이 있다. 다공원통형 구조물의 온도해석을 위해 2차원 열전토 방정식을 이용하였다. 유한요소해석은 ANSYS 6.1을 이용하여 수행하였다. 다공원통형 구조물의 온도해석에서 이론해석결과와 유한요소해석결과는 홀의 개수가 3개 이하에서는 온도가 서로 잘 일치하는 것으로 나타났다. 구조물의 홀 개수가 4개일때, 온도분포해석에 대한 두 결과의 차이가 증가하였다. During the irradiation tests of material and fuel rod, all components of the cylindrical structure with multiple holes act like heat sources due to high gamma heat and fission heat. The objective of this study is to formulate the general solution for the temperature distribution to estimate the thermal integrity of structure during irradiation tests. For the temperature distribution analysis, the two-dimensional heat conduction theory is used. The unmerical analysis is performed by the commercial finite element analysis code, ANSYS 6.1. If the cylindrical structure with hole number would not exceed three holes, the analysis results and finite element results are good agreement together. For the structure with four holes, the discrepancy between FE results and analysis results of the structural temperature distribution is increased.

금속 Ca증기에 의한 고체 Nd 금속의 탈산

최영진,김상욱,전병서,송창빈,오윤석,이영주,Choi, Yonug-Jin,Kim, Sang-Wuk,Jeon, Byung-Seo,Song, Chang-Bin,Oho, Yoon-Seok,Lee, Young-Joo 한국재료학회 2017 한국재료학회지 Vol.27 No.5

As a basic study for the removal of oxygen in solid Nd metal by metal Ca vapour, by using the thermodynamic data such as ${\Delta}G-T$ diagrams and Nd-O and Nd-Ca equilibrium diagrams, the amount of residual oxygen in solid Nd metal formed based on deoxidation reaction by Ca vapour, instead of by direct contact of solid Nd metal and Ca solution, was determined. Deoxidation experiments were carried out for solid Nd metal in a temperature range of $890{\sim}970^{\circ}C$ for 1h to 4h and content of addition Ca of 0.6~1.8 g (5~15 wt% of solid Nd metal). As a result, it was found that as deoxidation temperature increased, dissolved oxygen decreased. Especially, it was observed that a small amount of Nd-Ca alloy liquid was formed on the surface of the solid Nd metal sample deoxidized at $970^{\circ}C$ for approximately 1 hour. Also, it was found that if the content of addition Ca was 1.8 g (15 wt% of solid Nd metal) the amount of produced Nd-Ca alloy increased slightly. However, for the Nd sample with which the deoxidation reaction was performed at $930^{\circ}C$ for 4h with content of addition of Ca of 1.5 g (13 wt% of Nd metal), the residual oxygen was found to decreased to 12.00 ppm.

국립중앙도서관 소장의 「Jusikbangmun (주식방문)」을 통해 본 조선 후기 음식에 대한 고찰

최영진,Choi, Young-Jin 한국식생활문화학회 2016 韓國食生活文化學會誌 Vol.31 No.6

This study is a comparative study on a cookbook published in 1900s titled "Jusikbangmun", one of collections of the National Central Library, along with other cookery books in Joseon Dynasty in the late 1800s to early 1900s. "Jusikbangmun" consists of 51 recipes, including 45 kinds of staple foods and six kinds of brews. More than 60% of the recipes deal with staple dishes and side-dishes, whereas the rest deal with ceremonial dishes and drinking. The "Jusikbangmun" applies a composite method of cooking from boiling and steaming to seasoning with oil spices. The ingredients are largely meats rather than vegetables, which is distinguished other cookery books in the Joseon Dynasty. Only "Jusikbangmun" deals with such peculiar recipes as 'Kanmagitang', 'Bookyengsumyentang', 'Jeryukpyen', 'Yangsopyen', and 'Dalgihye'. It is estimated that "Jusikbangmun" was published around the 1900s based on findings that "Jusikbangmun" is more similar with "Buinpilgi" and "Joseonyorijebeop" in the early 1900s than with "Kyuhapchongseo", "Siyijenseo" and "Jusiksieui" in 1800s. Therefore, "Jusikbangmun" is a valuable resource, we can use understand the food culture of the late Joseon period.

LP-MOCVD법으로 합성된 ZnO 나노선의 구조 및 광학적 특성

최영진,박재환,박재관,Choi, Young-Jin,Park, Jae-Hwan,Park, Jae-Gwan 한국결정학회 2006 韓國結晶學會誌 Vol.17 No.1

MOCVD 공정방법에 의해 수직정렬된 ZnO 나노선을 합성하고 공정조건 제어에 의해 합성되는 나노선의 물리적, 광학적 특성이 어떻게 변화하는지를 고찰하고자 하였다. 온도 및 산소분압제어 등의 공전변수 제어를 통하여 ZnO 나노 구조체는 나노선, 나노로드 뿐만 아니라 나노바늘 (nano-needle) 등 다양한 구조로 변화되었으며 그 직경 및 길이도 제어가 가능하였다. 전체적으로 양호한 특성의 wurzite 구조를 나타내었으며 기판에 수직인 방향으로 [0001] 방향으로 성장하였다. 광학특성에서는 나노선 직경이 작아질수록 주방출 피크의 천이현상이 관찰되었다.

미래 식량자원으로써 장수풍뎅이 유충의 영양학적 평가

최영진,범미기,김은경,이슬비,황연현,장영호,배성문,Choi, Young-Jin,Fan, Meiqi,Kim, Eun-Kyung,Lee, Seul-bi,Hwang, Yeon-hyeon,Jang, Yeong-Ho,Bae, Sung-Mun 한국식품과학회 2020 한국식품과학회지 Vol.52 No.6

식용 곤충은 인구증가에 따른 식량 문제를 해결하기 위한 하나의 방법으로 제시되며 최근 곤충의 생리활성 기능과 관련한 연구가 많이 수행되고 있다. 반면 식품으로서 활용 가능한 기초연구는 부족한 실정으로 본 연구에서 장수풍뎅이 유충의 단백질 대체 자원으로서 영양학적 기능을 규명하기 위한 실험을 실시하여 장수풍뎅이 유충 단백질(ADP)의 식이 효율, 단백질 효율, 순 소화율 등을 동물실험을 통해 알아보았다. 4주령 SD-rat 24마리를 이용하여 각 그룹 당 8마리 3그룹으로 실험을 실시하였다. 실험군은 사료 내 전체 kcal 20%가 Casein 단백질로 구성된 사료를 식이 하는 일반 식이군(Con), 전체 kcal 20%가 장수풍뎅이 유충의 단백질로 구성된 사료를 식이 하는 장수풍뎅이 유충 단백질식이군(ADP), 그리고 체내 대사작용에 의해 배설되는 단백질(metabolic fecal nitrogen)을 측정하기 위하여 단백질 무 첨가 식이군(NP, non-protein diet)으로 설정했다. 4주간 식이를 공급하여 장수풍뎅이 유충 단백질의 식이 효율(Food Efficiency Ratio, FER), 단백질 효율(Protein Efficiency Ratio, PER), 순 소화율(true digestibility, TD)을 평가했다. 본 실험 결과 식이 효율은 Con군에서 0.52, 장수풍뎅이 유충 단백질 섭취군에서 0.41로 ADP에서 유의적으로 낮은 수준을 보였다. 단백질 효율은 ADP군에서 2.39, Con군에서 2.63으로 ADP군은 Con군에 비해 낮았으나 유의적인 차이는 없었다. 순 소화율은 Con군에서 91%, ADP군에서 80%로 나타났으며 통계적인 유의적 차이는 없었다. 장수풍뎅이 유충의 순 소화율은 80%로 나타났으며 콩과류의 단백질 순 소화율 64-77%에 비해 높은 수준을 보였다. Edible insects might be used as a means to solve food insecurity caused by population growth. Many studies have investigated the biological activity of insects; however, few studies have investigated the nutritional value of insects. Therefore, the aim of this study was to investigate the nutritional value of Allomyrina dichotoma larva protein (ADP) as a source of protein replacement. In vivo studies were conducted to determine the food efficiency ratio (FER), protein efficiency ratio (PER), and true digestibility (TD) of ADP. Experiments were conducted in 3 groups of 8 animals per group using twenty-four 4-week-old SD rats. The experimental groups included the general diet group (Con), in which 20% of the total Kcal in the diet was composed of casein protein, and the ADP group (ADP), in which 20% of the total Kcal was composed of ADP protein, and a non-protein diet group (NP) to measure the protein (metabolic fecal nitrogen) excreted by metabolic processes in the body. As a result of this experiment, we found that the FERs were 0.52 and 0.41 in the casein protein intake (Con) and ADP groups, respectively, thus showing a significantly lower level in the ADP group. The PERs of ADP and Con were 2.39 and 2.63, respectively. The TD of Con and ADP were 91% and 80%, respectively.

충주(忠州)댐 우안(右岸) 산사태(山沙汰)에 관한 연구(硏究)

최영진,송무영,Choi, Young Jin,Song, Moo Young 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.3

Analysis for landslides was studied in framework of Chungju dam right abutment, 6.5km northeast of Chungju city. $5.5{\times}10^6m^3$ landslide materials were excavated during dam construction for safety of the Chungju dam. Geology of study area is composed mainly of meta sediments such as dolomitic limestone, quartzite and schist which are dipping toward the Nam Han river. Scanline survey of discontinuities was performed for slope stability, resistivity exploration was performed for the evaluation of potential failure plane, and direct shear strength test of rocks and soils was performed for the effect on landslide. Monitoring systems of tiltmeter, tensiometer, ground water observation hole and level monument were installed during dam construction and interpreted for the evaluation of slope instability. Kinematic solution of the geological structure and evaluation using safety factor for slope may prove the failure of the slope.

Kano 모델을 이용한 화장품 구매의도에 영향을 미치는 마케팅 믹스요인에 관한 연구

최영진,장규순,Choi, Young Jin,Chang, Gyoo Soon 한국벤처창업학회 2014 벤처창업연구 Vol.9 No.6

본 연구는 Kano 모델을 이용하여 화장품 구매에 영향을 미치는 마케팅 믹스 요인을 분석하기 위해, 선행적 연구를 바탕으로 마케팅 믹스 요인 분류에 따라 긍정적 질문과 부정적 질문을 동시에 설문하여 매력적 품질, 일원적 품질, 당연적 품질을 규명하고자 하였다. Timko's Analysis 고객 만족과 불만족 계수를 이용한 화장품 구매에 영향을 미치는 마케팅 믹스 요인을 분석한 결과 촉진전략 중 가격할인 정책과 가족/ 주변인의 추천 전략이 매력적 품질로 나타났다. 제품 전략의 효능과 효과, 사용감, 피부적합성은 일원적 품질로 나와 고객의 요구를 충족시키면 선형적으로 그 만족도가 증가하는 것으로 파악되었다. 반면에 제품 측면의 용기, 포장 디자인, 색상, 브랜드 인지도와, 가격 측면의 낮은 가격, 중간가격 수준과 유통 측면의 구매경로, 촉진 측면의 매체 광고 에 대해서는 무관심 품질로 나타나서 이들 요인에 대하여는 과도한 예산을 집행하는 것은 투입대비 효과가 높지 않을 것으로 판단해 볼 수 있다. This study is to contribute to the policy decision of cosmetic industry through analyzing marketing mix factors which affects customers' buying intention. For this study, marketing mix factors that impact on cosmetic customers purchasing intention were collected and chi-square independence analysis of SPSS and qualitative analysis technology of Kano & Timko were used. Analysis reached one conclusion, which factors were maximizing customers satisfaction, shows the price discount policy and recommendation from family and colleague. Product's effectiveness, usefulness and skin compatibility were rated as an one-dimensional quality as those factors were linearly affected when customers needs were satisfied. However product's containers, package design, colors, brand reputation, low and middle price, distribution channel and advertising medias were investigated as an indifferent quality and they were rated as low satisfaction/dissatisfaction coefficient of Timko. Therefore they do not need to invest to those factors too much budget for attaining customers' buying intention.

의료기관 홍보에 대한 의료기관 종사자의 태도 및 인식

최영진,임복희,황병덕,Choi, Young-Jin,Im, Bock-Hee,Hwang, Byung-Deog 보건의료산업학회 2009 보건의료산업학회지 Vol.3 No.2

The aim of this study is to provide basic data in establishing marketing strategies for hospital by analyzing effective public relations of hospital through attitude and awareness on medical public relations by employee of hospital. The awareness on medical public relations by employee of hospitals were highest among aged 50s or above and above university graduates from the level of education, and from hospital management from types of duties and from those who have worked for more than 10 years. The methods medical public relations positively regarded by employee of hospitals were 'Appearing at health programs' followed by 'Periodicals like magazines and books', 'Issuing of hospital bulletins to homes of patients visiting hospitals'.

LTCC용 저/중유전율 유전체 후막의 동시소성

최영진,박정현,고원준,박재환,남산,박재관,Choi Young-Jin,Park Jeong-Hyun,Ko Won-Jun,Park Jae-Hwan,Nahm Sahn,Park Jae-Gwan 한국재료학회 2004 한국재료학회지 Vol.14 No.10

Herein, we report on the co-firing of a low-K wiring substrate and a middle-K functional substrate in LTCC. Firstly, we researched the sintering behavior and dielectric properties of the low-k wiring substrate comprised by alumina and glass frit with ${\varepsilon}_r$, of $\sim7$ and the middle-k functional substrate comprised by $Ba_{5}Nb_{4}O_{15}$ and glass frit with ${\varepsilon}_r$, of $20\sim30$. The warpage and delamination between the hetero layers of the low-K and the middle-K composition were also studied. In particular, physical matching of the hetero layers could be possible by adjusting of the sintering properties of the composition. We observed that an introduction of the glass frit to the low- and middle-K substrate gives rise to a minimization of an effect given by separation of the hetero layers, and modification of the fraction of the glass frit accompanied by a variation of the composition could control the sintering behavior and its beginning temperature. In the case of co-firing of the L03 as the low-K wiring substrate composition and the M03 as the middle-K functional substrate composition at $875^{\circ}C$, we could fabricate a desirable structure of hetero layers without any kinds of structural defects such as separation, warpage, delamination, pore trap, etc. We suppose that the co-firing techniques described in this study would provide a helpful method to fabricate a LTCC multi-functional for the next generation.

신세포암의 세침 흡인 세포학적 소견: 투명세포형, 과립세포형 및 호산성 과립세포종

최영진,이연수,권미선,이교영,김병기,심상인,Choi, Yeong-Jin,Lee, Youn-Soo,Kwon, Mi-Seon,Lee, Kyo-Young,Kim, Byung-Kee,Shim, Sang-In 대한세포병리학회 1996 대한세포병리학회지 Vol.7 No.1

It is well known that fine needle aspiration biopsy(FNAB) is very useful and has a high accuracy rate in the diagnosis of renal neoplasms. Although there is some indecision to perform the FNAB for a rare possibility of tumor seeding along the biopsy needle tract, it tends to be used increasingly. As in the cytologic diagnosis of metastatic lesion through-out the body, renal cell carcinoma should nearly always be considered in the differential diagnosis, the precise understanding of cytologic features of renal cell carcinoma with various cell types and architectural patterns is necessarily required. In this report, we present three cases of primary renal cell tumors, two of renal cell carcinomas and one of oncocytoma, preponderantly emphasizing the cytologic differential points in the FNAB specimen.