Solubilities of Calcium and Zinc Lactate in Water and Water - Ethanol Mixture

Cao, Xue Jun,Lee, Ho Joon,Yun, Hyun Shik,Koo, Yoon Mo 한국화학공학회 2001 Korean Journal of Chemical Engineering Vol.18 No.1

The solubility of lactate salts, L(+) and DL( ±) forms of calcium and zinc lactate in water at temperature between 5 and 80℃, was measured and empirical equations were obtained by regression of solubility-temperature data. The equations can be used to calculate the solubility of calcium and zinc lactate at a given temperature. The change in solubility of L(+) and DL( ±) calcium and zinc lactate in water-ethanol mixture at 20℃ was also investigated. The solubilities of calcium and zinc lactate were lowered by the addition of ethanol to the solution.

Numerical Analysis of Blast Pressure Distribution on a Rectangular

Cao, Jun Wei(조준위),Kim, Han Soo(김한수),Kim, Hui Jing(김혜경) 한국콘크리트학회 2018 한국콘크리트학회 학술대회 논문집 Vol.30 No.1

Design of Fractional Order Controller Based on Particle Swarm Optimization

Jun-Yi Cao,Bing-Gang Cao 대한전기학회 2006 International Journal of Control, Automation, and Vol.4 No.6

An intelligent optimization method for designing Fractional Order PID (FOPID) controllers based on Particle Swarm Optimization (PSO) is presented in this paper. Fractional calculus can provide novel and higher performance extension for FOPID controllers. However, the difficulties of designing FOPlD controllers increase, because FOPID controllers append derivative order and integral order in comparison with traditional PID controllers. To design the parameters of FOPID controllers, the enhanced PSO algorithms is adopted, which guarantee the particle position inside the defined search spaces with momentum factor. The optimization performance target is the weighted combination of ITAE and control input. The numerical realization of FOPlD controllers uses the methods of Tustin operator and continued fraction expansion. Experimental results show the proposed design method can design effectively the parameters of FOPID controllers.

Finite element analysis on the effect of multiple openings on the shear stiffness and strength of outrigger wall

Cao, Jun Wei(조준위),Kim, Han Soo(김한수) 한국콘크리트학회 2019 한국콘크리트학회 학술대회 논문집 Vol.31 No.2

Biosynthesis of Cephalexin in PEG400-Ammonium Sulfate and PEG400- Magnesium Sulfate Aqueous Two-Phase Systems

( Cao Xue Jun ),( Jian Hang Zhu ),( Dong Zhi Wei ),( Byung Ki Hur ) 한국미생물생명공학회 2004 Journal of microbiology and biotechnology Vol.14 No.1

Influence of APP Quality on the Success of Mobile Health App in China : Evaluating Moderation Effects of Familiarity

Jun-Wei Cao,Gui-Hua Zhang,Dae-Wan Kim 한국디지털융합학회 2021 IJICTDC Vol.6 No.2

The service quality of mobile health apps is a crucial factor affecting users’ satisfaction. For analyzing the influence of service quality of mobile health apps on users’ satisfaction in China, a hypothetical model with three dimensions and eight variables was established. Then this hypothetical model was combined with the model of mobile health service quality and hypotheses were proposed based on the actual situations according to the updated D&M information system success (UMDISS) theory. Questionnaires were issued to collect data and the SEM-PLS method was used to valid the hypothetical model and hypotheses. The reliability and security of the system quality of mobile health apps positively impacted the users’ satisfaction. The cooperation and personalization of service quality had a significant impact on the users’ willingness to use mobile health apps. Through multi-group analyses, it was found that the relationship between mobile health app system quality, users’ satisfaction, and the use of mobile health apps differed under different familiarities with mobile health apps. This study is expected to provide theoretical guidance for the marketing of mobile health apps.

Image Enhancement Algorithm and its Application in Image Defogging

Jun Cao 한국정보처리학회 2023 Journal of information processing systems Vol.19 No.4

An image enhancement algorithm and image defogging method are studied in this paper. The formation of fogand the characteristics of fog image are analyzed, and the fog image is preprocessed by histogram equalizationmethod; then the additive white noise is removed by foggy image attenuation model, the atmospheric scatteringphysical model is constructed, the image detail characteristics are enhanced by image enhancement method,and the visual effect of defogging image is enhanced by guided filtering method. The proposed method has agood defogging effect on the image. When the number of training iterations is 3,000, the peak signal-to-noiseratio of the proposed method is 43.29 dB and the image structure similarity is 0.9616, indicating excellentimage defogging effect.

有关在韩汉语教学中Tandem课的评估方式小考

조소군(Cao Xiao Jun)(曹筱,君) 대한중국학회 2016 중국학 Vol.57 No.-

Tandem学习法进入韩国后, 不只是单纯的作为一种辅助外语学习法在推广, 在釜山外国语大学里, 则是作为大学常规科目在进行。在釜山外国语大学中文系的Tandem课上, 教师是从哪些方面对学生进行评估的?教师是以何种打分标准对学生进行评分的?学生们对此评估方式是否满意?带着这些疑问, 笔者开始着手准备此论文。本论文以釜山外国语大学中文系Tandem课为研究中心, 通过对釜山外国语大学中文系Tandem课发展的梳理, 以及对目前中文系Tandem课的评估现状进行介绍。而且首次对现在正在运行中的评估方式, 通过问卷调查的形式来进行观察, 并分析总结。问卷调查的结果显示, 学生们普遍对现有的评估方式表示满意和认同, 这完全说明现有的评估方式是值得被肯定的。但高兴的同时, 作为教师又不得不看到, 在Tandem课上, 学生既是学生又是老师, 但是学生本身在作为老师时, 应具有的评估意识很薄弱。如何帮助学生正确树立起自主评价的认识, 如何客观合理地建立学生间的打评标准等研究问题提出更高的研究要求。 When Tandem learning method was introduced into South Korea, it is not only an auxiliary method of learning foreign language in the promotion, but also became a normal subject in Busan University of Foreign studies. In the Tandem course of Chinese Department in Busan University of Foreign Studies, how the teacher to evaluate the students? What kind of standard the teacher to evaluate students? With these questions, started to prepare the thesis.This thesis is based on the Tandem course in Chinese department of Busan University of Foreign Studies, and the development of the Tandem course in Busan University of Foreign Studies and the present situation of the Tandem course in Chinese Department are introduced. Also it is the first time to observe and analyze the evaluation profile in progress through the questionnaire survey form. The results of the questionnaire show that students generally expressed satisfaction and recognition of the existing evaluation, which fully shows that the existing evaluation is worthy of recognition. However, as a teacher, This thesis noticed students, who are both students and teachers in the Tandem class, have very weak awareness of evaluation when they are teachers. How to help students to establish the correct understanding of self-evaluation, how to set up objective and reasonable evaluation standard among students, and more research questions put forward higher requirements.

学生学业自我效能感与学习投入的关系 -围绕自尊的中介作用-

曹俊 ( Cao-jun ),刘文科 ( Liu-wenke ),李增杰 ( Li-zengjie ) 경상대학교 교육연구원 2022 중등교육연구 Vol.34 No.1

사회가 발전함에 따라, 국내외 많은 학자들은 점점 대학생의 학습몰입에 주목하기 시작했다. 대학생의 학업에 있어서 학업능률성과 학습몰입의 관계는 학업효과에 매우 중요한 영향을 미치고 있으며, 그 구체적인 영향 메커니즘은 교육연구자의 주목을 받고 있다. 그러나 대학생의 사회지지능력 인지 및 학업능률성과 자존감이 학습몰입에 영향을 미치는 중요한 지표임에도 불구하고, 이러한 변수의 구체적인 영향 메커니즘에 대하여 충분히 연구하는 학자는 아직 없어 보인다. 본 연구는 칭다오시 모 대학교 195명의 대학생을 연구대상으로 삼았으며, 학습몰입량표를 사용하여 조사가 진행되었고, 학업능률성과 자존감이 학습몰입에 미치는 구체적인 영향 메커니즘을 연구하였다. 연구 결과, 대학생 집단의 학업능률성과 자존감은 유의미한 상관관계가 있다고 나타났다. 대학생의 학업능률성은 학습몰입에 직접적인 영향을 줄 수 있으며, 자존감이 높을수록 학습몰입에 긍정적인 효과를 줄 수 있다고 나타났다. 따라서 학교는 교육과정에서 학생들의 학업능률성과 자존감을 중점적인 관심대상으로 삼아야 하고, 대학생들이 돌발상황에 마주했을 때 스스로 긍정적인 마인드로 의연하게 대처하도록 도와야 하며, 더 나아가 대학생들의 학습몰입도를 또한 높여야 할 것이다. With the need of social development, more and more scholars at home and abroad began to pay attention to college students' learning investment. College students' academic self-efficacy and learning engagement, as important factors affecting the learning effect, have been widely concerned by educational researchers and practitioners. College students' ability to comprehend social support, academic self-efficacy and self-esteem are important indicators affecting their learning engagement, but no scholars have fully explored the specific influence mechanism of these variables. In this study, 204 students from a university in Qingdao were surveyed by using the academic self-efficacy scale, self-esteem scale and learning engagement scale, and the relationship and mechanism of academic self-efficacy, self-esteem and learning engagement scale were discussed. The results show that academic self-efficacy is positively correlated with self-esteem. Academic self-efficacy not only has a direct positive impact on learning engagement, but also has an impact on college students' learning engagement through the mediating effect of self-esteem. School teaching should focus on cultivating students' academic self-efficacy and self-esteem, face their studies with a positive attitude, such as COVID-19, and help students improve their learning engagement.

Separation of EPA and DHA from Fish Oil Using Modified Zeolite 13X and Supercritical CO2

Xue Jun Cao 한국공업화학회 2005 Journal of Industrial and Engineering Chemistry Vol.11 No.5