The Impact of Macroeconomic Variables on the Profitability of Korean Ocean-Going Shipping Companies

Myoung-Hee Kim,Ki-Hwan Lee 한국항해항만학회 2019 한국항해항만학회지 Vol.43 No.2

The objective of this study was to establish whether global macroeconomic indicators affect the profitability of Korean shipping companies by using panel regression analysis. OROA (operating return on assets) and ROA (ratio of net profit to assets) were selected as proxy variables for profitability. OROA and ROA were used as dependent variables. The world GDP growth rate, interest rate, exchange rate, stock index, bunker price, freight, demand and supply of the world shipping market were set as independent variables. The size of the firm was added to the control variable. For small-sized firms, OROA was not affect by macroeconomic indicators. However, ROA was affected by variables such as interest rates, bunker prices, and size of firms. For medium-sized firms, OROA was affected by demand, supply, GDP, freight, and asset variables. However, macroeconomic indicators did not affect ROA. For large-sized firms, freight, GDP, and stock index (SCI; Shanghai Composite Index) have an effect on OROA. ROA was analyzed to be influenced by bunker price and SCI.

치과위생사의 치과 물리치료 업무 현황 및 교육 요구도

( Myoung-hee Kim ),( Hyun-woong Jeong ),( Young-sun Hwang ) 한국치위생학회 2022 한국치위생학회지 Vol.22 No.5

연구목적: TMJ 물리 치료를 제공하는 치과병의원의 수가 증가하고 있지만 치위생학 교육과정에서 구강내과학에 수반되는 치과 물리치료의 교육내용은 매우 제한적인 상황이다. 본 연구의 목적은 치과위생사의 치과 물리치료 업무 현황을 살펴보고 치위생학에서의 관련 교육의 중요도 및 수요도를 조사하기 위함이다. 연구방법: 온라인 플랫폼을 통한 임상에 종사하고 있는 총 140명의 치과위생사를 대상으로 일반적 특성, 치과 물리치료 업무 경험 및 중요성, 관련 업무에 관한 치위생학 교육 수요도 등에 대한 질문으로 구성되었다. 연구결과: 연구 참여자의 절반에 가까운 49.3%가 치과 물리 치료 업무수행 경험이 있는 것으로 조사되었다. 이들의 근무 영역은 주로 TMJ 자극치료 인증 클리닉이었다. 응답자 140명 중 88.6%가 '물리치료 작업이 중요하거나 중요해질 것'이라고 인식하였고, 84.3%가 '치위생사에게 물리치료 교육이 필요하다'고 응답하였다. 치과 물리치료의 경험이 없는(50.7%) 임상 치과위생사들에서도 치과에서 물리치료 업무의 중요성의 인지 및 관련 교육이 필요하다고 응답하였다. 결론: 치과위생사가 보다 실질적인 임상업무를 효과적으로 수행할 수 있도록 치위생 교육과정에서의 치과물리치료 교육이 필요함을 제안한다. Objectives: Although the number of clinics offering temporomandibular joint (TMJ) physical therapy has been increasing to help with its treatment, the scope of dental physiotherapy reflected in the dental hygienist curriculum is very limited. This study aims to survey the status of dental physiotherapy work and the need for educating dental hygienists. Methods: An online community platform was used to survey 140 dental hygienists working in clinical dental hospitals. The survey included questions about general characteristics, the experience of dental physiotherapy work, the importance of physiotherapy work performance, and the need for physical therapy education for dental hygienists. Results: Half of the study participants had prior experience working in dental physiotherapy. Out of 140 participants, 88.6% agreed with the opinion that ‘physical therapy work is important or that it will become important’. Furthermore, 84.3% agreed that ‘physical therapy education is necessary for dental hygienists’. Even dental hygienists without physical therapy experience (50.7%) believed that related education would be necessary because of the importance of physical therapy work in dentistry. Conclusions: This study suggests the need for education in dental physiotherapy to help dental hygienists effectively perform clinical tasks.

Differential Expression of Hox Genes during Murine Liver Regeneration

Boyeon Youn,Hyoung Woo Park,Sung Goo Park,Myoung Hee Kim 한국유전학회 2007 Genes & Genomics Vol.29 No.4

In order to infer the Hox code during liver regeneration, Hox gene expression pattern was analyzed during liver regeneration after partial hepatectomy in mice. Total RNAs and proteins have been prepared from the liver tissues at various times after regeneration (0 h, 4 h, and 3 d) following partial hepatectomy. Using degenerate RT-PCR, cloning, and sequencing technique, expressed Hox genes were analyzed. The Hox genes belonging to the paralogous groups VIII, IX and X manifested themselves in a peculiar way during regeneration process with stage specific characteristics: Hox genes belonging to the paralogous groups IX and X were almost exclusively expressed during regeneration whereas the paralogous group VIII, especially Hoxb8 and -c8 were strongly expressed in normal liver. The proteom analysis revealed that almost 21% of the differentially expressed proteins (6 out of 29 differentially expressed protein spots) during liver regeneration turned out to be Hox genes. Furthermore, Hoxa10 and- d10 belonging to the AbdB type paralogous group X were upregulated during regeneration. These results altogether indicate that Hox genes seemed to be differentially expressed during murine liver regeneration at the transcriptional as well as translational level. Especially the Hox genes belonging to the paralogous group X such as Hoxa10 and Hoxd10 seemed to be a part of Hox code for the murine liver regeneration.

Natural Blue Pigment from Gardenia jasminoides Ellis (Rubiaceae) as a Dental Plaque Disclosant

( Myoung-hee Kim ),( Min-ho Lee ),( Young Sun Hwang ) 한국치위생과학회 2021 치위생과학회지 Vol.21 No.1

Background: Dental caries and periodontal disease are bacterial infectious disease, mainly caused by plaque, a bacterial colony deposited on the tooth surface and gum tissue. Dental plaque disclosants easily stain the dental plaque, making them effective for scaling and tooth brushing education. As the erythrosine typically contained in dental plaque disclosants is highly cytotoxic, a low toxicity additive is needed. In this study, we aimed to examine the natural pigments with negligible cytotoxicity but can effectively stain the dental plaques for use in dental plaque disclosants. Methods: The pigmentation of eight types of natural pigments was tested on bovine tongue and teeth, as well as on head and neck tissue sections of experimental ICR mice. The cytotoxicity of gingival epithelial cells was measured via MTT assay. Pigmentation was performed on the bovine tongue and tooth surface. Pigmentation in the oral environment was observed in four mandibular incisors. A 2 Tone was used as a control. Results: Of the eight types of natural pigments, purple and blue pigments were effective in coloring dental plaques on the enamel surface as well as in the head and neck tissue sections. Additionally, purple and blue pigments were visible on the surface of the bovine tongue. Red, pink, orange, green, purple, and yellow pigments showed strong cytotoxicity, whereas brown and blue pigments had relatively low cytotoxicity. Blue pigment was effective in staining the dental plaque of four mandibular incisors. Conclusion: We suggest that the blue pigment derived from Gardenia jasminoides Ellis (Rubiaceae), which is effective for coloring dental plaques and has low cytotoxicity, is useful as a naturally derived dental disclosant.

Polymerization of Hydrosilanes and Vinyl Monomers in the Presence of Transition Metal Complex

Myoung-Hee Kim,Jun Lee,Hyo Chang Cha,Joong-Hyeok Shin,Hee-Gweon Woo 조선대학교 기초과학연구원 2009 조선자연과학논문집 Vol.2 No.1

Dehydrogenative Polymerization of Hydrosilanes to Silicon Polymers

Myoung-Hee Kim,Jun Lee,Soo-Yong Mo,Jong-Hyun Kim,Hee-Gweon Woo 조선대학교 기초과학연구원 2010 조선자연과학논문집 Vol.3 No.2

Dehydrocoupling of Bis(silyl)alkylbenzenes to Network Polysilanes, Catalyzed by Group 4 Metallocene Combination

Myoung-Hee Kim,Jun Lee,Soo-Yong Moo,Jong-Hyun Kim,Young Chun Ko,Hee-Gweon Woo 조선대학교 기초과학연구원 2010 조선자연과학논문집 Vol.3 No.1

Photopolymerization of Vinyl Monomers Using Organic Initiators

Myoung-Hee Kim,Jun Lee,Hyo Chang Cha,Heui-Suk Ham,Hee-Gweon Woo 조선대학교 기초과학연구원 2009 조선자연과학논문집 Vol.2 No.1

Factors Affecting Sexual Attitudes among Male High School Students in Korea

Myoung-Hee Kim 보안공학연구지원센터 2016 International Journal of Bio-Science and Bio-Techn Vol.8 No.4

This study examined the sexual knowledge, contraceptive knowledge and sexual attitudes among male high school students. In addition, the factors that affect sexual attitudes of male high school students were investigated. As a cross-sectional study, a questionnaire survey was conducted in G high school and an investigation carried out by a structured survey of 79 male high school students. The results are as follows: The subjects’ sexual attitude was positive as shown by its average was 2.25 (SD=0.32). The multiple regression analysis showed that sexual attitude was significantly predicted by sexual knowledge and contraceptive knowledge. These variables explained 35.2% of the variance of sexual attitudes of male high school students. Therefore, the provision of education on basic sexual knowledge and contraceptive knowledge can be an important factor in establishing appropriate sexual attitudes and values.

A Case Study of the Use of an Instructional Task for Better CBI

Myounghee Kim 한국응용언어학회 2009 응용 언어학 Vol.25 No.3

As increasing numbers of CBI courses are being offered at colleges, these is an urgent need for more information on effective instructional tasks for better CBI. The present study reports the use of an instructional task called Course Discussion Strategies (CDS), which was on of the primary organizing tools in two college CBI courses, CDS required the students to complete on of the six assignments each week and to have small group discussions in the class, This study first provides a detailed description of the characteristics of CDS. it then describes how the students perceived CDS and also CBI. Data were collected through questionnaires, interviews, and document collection. The data analysis showed that the students valued CDS in many aspects, including a better understanding of the course content, smooth link created between readings and lectures, enhanced familiarity with the classmates, active construction of knowledge, and provision of novel ways of exploring and expressing ideas. The students also showed pretty positive reaction to CBI, as reflected in reduced anxiety about CBI and high likelihood of taking more CBI courses in the future. Based on these findings, the present study offers suggestions and considerations for better implementation of CBI.