다공판탑의 수력학적 연구

최웅,임한응 한국화학공학회 1966 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.4 No.3

In this paper, a six-inch cylindrical column was used to study a certain hydraulic characteristic of the perforated trays in air-water system. To obtain better understanding about the effect of the liquid head on the performance, two types of experiment were used: in one type(A) the liquid was supplied into the test column from the constant head tank; in the other type(B) it was flowed in through the downcomer and out over the outlet weir as in usual industrial usage. The various kind of the trays used are shown in Table 1 and the equivalent liquid height varied up to 20 cm in the Type A. Time averaged air flow rate covered the range upto l0 ℓ/sec and water rate upto 260 ㎖/sec. In these experiments we observed the froth layer and correlated the total pressure drop, relative froth density, etc..

數種의 韓藥材가 毛髮成長에 미치는 影響

최웅,최정화,김종한,Choi, Woong,Choi, Jung-Hwa,Kim, Jong-Han 대한한방안이비인후피부과학회 2002 한방안이비인후피부과학회지 Vol.15 No.2

To screen the effective materials for hair loss treatment, several natural extracts were tested using in vivo and in vitro test models. Firstly, all test materials were applicated onto the back skin of C57BL/6 mouse and then hair growth pormoting effect were measured using hair growth index As a result, Polygonum muitifiorum Thunb and Terrninalia chebula Retz. showed potent hair growth promoting effect, ranking as 1.5-2.0 of hair growth index. However, there were no plant extracts, which have remarkable potential of growth promotion of human hair dermal papilla cells cultured in vitro. In the experiments of 5${\alpha}$-reductase type Ⅱ inhibition assay, Morus alba L., Chaenomelis Fructus, Saussureae Radix, Angelicae Gigantis Radix, Polygonum multifiorum Thunb, and Angelica dahurica (Fischer) Bentham et Hooker f. showed effective potential to inhibit the activity of 5${\alpha}$-reductase type Ⅱ. To investigate the possible involvement of effects of several plant extracts on the gene expression of growth factors in human hair dermal papilla cells, RT-PCR analyses were performed. As a consequences, Mentha haplocalyx Briq., Cimicifuga foetida L., Eclipta prostrata (L.) L., Pinus densiflora S. et. Z, and Polygonum muitifiorum Thunb revealed the regulatory roles on the expression of growth factors such as IGF-I, KGF, HGF and VEGF in the dermal papilla cells. Another test for inhibition of microbial such as P. acne and P. ovale were also carried out to find whether these plant extracts have anti-microbial activities. Morus alba L. and Chaenomelis Fructus showed anti-microbial effects on Propionibacterium acnes, which is believed as a pathogen of acne. Together, these results showed several plant extracts can be used for hair growth promotion.

漢文 四大家의 文學理論

崔雄 강원대학 1985 人文學硏究 Vol.21 No.1

레스토랑 조리장의 피그말리온 리더십이 조직유효성에 미치는 영향

최웅,이정주 한국호텔리조트학회 2019 호텔리조트연구 Vol.18 No.1

The purpose of this study is to analyze empirically the effects of Pygmalion leadership of restaurant chefs on organizational effectiveness of job satisfaction and organizational commitment. In order to clarify the purpose of this study, we surveyed the cooks of a hotel restaurant in Seoul, Korea from December 5 to 10, 2018. A total of 350 questionnaires were distributed and 320 copies were collected and 307 copies were used for the empirical analysis except for 13 copies which were doubly fraudulent. The results of the questionnaire were analyzed through data coding, SPSS 22.0, factor analysis, reliability analysis, and regression analysis. As a result of factor analysis, Pygmalion leadership was classified into atmosphere, input, feedback, and output. Organizational effectiveness was classified into job satisfaction and organizational commitment. Hypothesis test results showed that atmosphere, input, feedback, and output of Pygmalion leadership had significant influence on the job satisfaction of cook, and atmosphere and feedback had significant influence on organizational commitment. However, input and output were studied to have no significant effect on organizational commitment. Based on the empirical results, we found that Pygmalion leadership of the chef can enhance the organizational effectiveness of the cook

와인구매의 위험지각에 따른 와인구매행동의 특성에 관한 연구 : 이단계 군집분석을 이용하여

최웅,이재선,박종승 한국외식경영학회 2009 외식경영연구 Vol.12 No.4

This study was to investigate how Korean wine consumers perceive risk in purchasing wine. The data was collected from 237 wine consumers in Seoul, and analyzed using SPSS Win. Ver. 11.5. The exploratory factor analyses identified three underlying dimensions of perceived risk of wine purchase; physical & social risk, time-loss risk, and financial & performance risk. Two-step cluster analysis was employed to classify wine consumers into a small number of clusters applying those three risk factors as metric variables and demographic and wine purchase behavior characteristics as non-metric variables. One-way ANOVA was also used to identify significant differences in wine purchase risk perception between clusters, and later chi-square tests were employed to understand the association between those clusters and demographic or wine purchase behavior characteristics. Research findings revealed that there were significant association of demographic or wine purchase behavior characteristics by those three clusters who showed significantly different wine purchase risk perception. And implications of these results were examined.

이차원 전이금속 칼코겐화합물 기반 논리소자

최웅,Choe, Ung 한국정보디스플레이학회 2016 인포메이션 디스플레이 Vol.17 No.3

강원대학교의 교양교육

최웅,Choe, Ung 한국대학교육협의회 1987 大學敎育 Vol.25 No.-

레스토랑의 식공간 연출이 고객만족에 미치는 영향

최웅,정봉구,우성근 한국외식경영학회 2011 외식경영연구 Vol.14 No.1

In this study, an empirical analysis was made for the purpose of catching customer satisfaction and loyalty by the dining space creation, which consumers recognize. The SPSS Ver. 14.0 and AMOS Ver. 5.0 were used to make a frequency analysis, factor analysis, path analysis and hierarchical regression analysis. The results of analysis were as follows. First, a descriptive analysis of dining space creation-26 measurement items showed that the mean of cleanness and atmosphere factors is high, while that of the menu, table composition and tableware's beauty factors is relatively low. Second, a hypothesis testing on a casual relationship between the cleanness, harmony, convenience, aesthetics and comfortableness of dining space creation, and the customer satisfaction and loyalty showed that the cleanness, convenience, aesthetics and comfortableness among sub-factors of dining space creation have a significant positive effect on the customer satisfaction.

구형물질의 마이크로파 냉동건조에 관한 수치해석

최웅,이수경,이중락 한국화학공학회 1983 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.21 No.3

마이크로파를 열원으로 하는 냉동조건의 이론적 해석을 위하여 구형물질을 모델로 수치해석을 행하였다. 건조층과 냉동층의 비정상상태 열 및 물질 수지식의 해를 Crank-Nicolson 방법으로 구하였으며 쇠고기의 물성치를 수치해석에 사용하였다. 수치실험의 결과 건조시간은 전기장력(electric field strength)의 증가에 따라서 감소하였으며 진공조의 압력이 5∼10㎜Hg일 때 최소 건조시간을 나타내었다. 이와 아울러 진공조의 온도, 수증기의 분압 및 시료의 반지름등도 건조시간에 직접 영향을 미친다는 사실을 확인하였다. Microwave is used as the heat source for freeze-drying process and the unsteady-stete behavior of spherical model is analysed numerically. The Crank Nicolson method is used to solve the transient energy and mass transfer equations in both ice core and dried layer. A mathematical model is used to simulate the freeze-drying of beef meat. The drying time decreases as the electric field strength increases. The drying time decreases as the pressure of vacuum chamber increases to 5-10 ㎜Hg, at which the minimum drying time occurs. And further increase of the vacuum chamber pressure results in the increase of the drying time. It has also been found that ambient temperature, partial pressure of water vapor in the vacuum chamber, and sample radius directly affect the dryng time.

Multiplex and quantitative SNP genotyping method using three color fluorescence labeled ligase detection reaction and high resolution CE-SSCP

최웅,정규열 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0

Accuracy, simplicity, sensitivity, quantification and cost-effectiveness are the most important criteria for a genotyping method for single-nucleotide polymorphisms (SNP). One method developed for SNP genotyping, ligase-based coupled capillary electrophoresis (CE) is considered for clinical diagnosis. However, conventional CE system is the design process and multiplex assay procedure are complicated because of the DNA size-based separation principle. In this study, we developed a robust multiplex genotyping method using ligase detection reaction and high-resolution CE-based single-strand conformation polymorphism (CE-SSCP). With this high-resolution CE-SSCP system, we were able to use similar-sized probes, simplifying the design step and assay process. And we found that this method could accurately discriminate single base mismatches and quantifying analysis of SNPs of tp53 gene used as targets for multiplex detection using multi-color fluorescence labeled probes.