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A Study on Factors Affecting Turnover Intention of Jewelry Distribution Distributor
Lee,Sangki,Lee,Donghae 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-
The purpose of this study is to analyze the components of internal marketing, job satisfaction, organizational commitment and turnover intention in jewelry distribution companies and to verify the relationship among these components. In order to achieve the purpose of this study, a literature survey related to internal marketing, job satisfaction, organizational commitment and turnover intention was carried out, and an empirical analysis was conducted by the use of a questionnaire method among employees in jewelry distribution companies. In the empirical research, a survey was conducted among 210 individuals working at jewelry distribution companies with the results analyzed. Additionally, Cronbach’s α analysis, factor analysis, and regression analysis were conducted by means of SPSS Window ver 18.0. Among internal marketing components of jewelry distribution companies, the two factors - management support and reward system - have positive (+) effect on job satisfaction and organizational commitment while internal communication and education/training have negative (-) effect on employees turnover intention. Jewelry distribution company employees job satisfaction and organizational commitment have negative (-) effect on their turnover intention. Internal marketing of a jewelry distribution company was positively related to job satisfaction and organizational commitment. Internal marketing, job satisfaction and organizational commitment were negatively related to turnover intention
Probiotic characteristics of <i>Bacillus</i> strains isolated from Korean traditional soy sauce
Lee, Sangki,Lee, Joongjae,Jin, Yong-Ik,Jeong, Jin-Cheol,Chang, Yoon Hyuk,Lee, Youngseung,Jeong, Yoonhwa,Kim, Misook Elsevier 2017 FOOD SCIENCE AND TECHNOLOGY -ZURICH- Vol.79 No.-
<P>The objective of this work was to isolate Bacillus strains from Korean traditional soy sauces, and evaluate them for probiotic potential and safety. Three Bacillus strains, MKSK-E1, MKSK-J1 and MKSK-M1, were selected which were highly resistant to simulated gastrointestinal tract conditions, and showed antimicrobial activity against Bacillus cereus, Listeria monocytogenes, Staphylococcus aureus and Escherichia coli. MKSK-M1 possessed the highest relative survival rate, with 96.0% survival in 0.1% pepsin solution (pH 2.0) and 99.3% survival in 3% bile salt solution for 3 h. All three strains exhibited amylase and protease activity, and utilized more than 19 carbohydrates among 49 tested carbohydrates. MKSK-E1 inhibited the growth of 11 of 13 tested foodborne pathogens. All three selected strains possessed strong antimicrobial activity against E. coli and B. cereus. They had antibiotic susceptibility against 8 tested antibiotics. Also, all strains were non-hemolytic on sheep blood, and non-biogenic amine producers. The results of this work indicate that MKSK-El, J1 and Ml could be used as probiotic cultures for human consumption and animal feeds and as probiotic starter cultures in food industries. (C) 2016 Elsevier Ltd. All rights reserved,</P>
SGML 문서 관리 시스템의 데이터베이스 관리기 설계 및 구현
이원석(Wonsuk Lee),류은숙(Eunsuk Ryu),김용훈(Yonghun Kim),이상기(Sangki Lee),김현기(Hyunki Kim),이혜란(Haeran Lee),주종철(Zongchul Zhoo),이규철(Kyuchul Lee) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅰ
SGML은 문서 정보를 체계적으로 조직하고, 생성하고, 전송하기 위한 문서 표준으로서 문서의 적절한 구조가 유지되도록 문서 구조를 표현하는데 사용할 수 있다. 이러한 문서 형태로 표현된 정보에서는 기존의 파일 형태의 정보에 비해 의미적인 정보의 단위를 구조(structure)로서 표현하며, 이 구조 정보를 이용해 문서의 관리 및 검색, 저장에 이용할 수 있는 장점이 있다. 본 논문에서는 SGML 문서 관리 시스템의 하부 구조로서 대량의 SGML 문서를 효율적으로 저장 및 검색, 관리할 수 있는 데이터베이스 관리기 구조의 필요 모듈들을 도출하고 각 모듈의 기능과 모듈 사이의 인터페이스 관계를 기술하였다. 또한 본 논문에서는 데이터베이스 관리기 구조의 각 모듈에 대한 구현 내용을 설명하기 위해 각 모듈간의 데이터 처리 흐름도를 기술하였으며, 구현 환경으로는 객체 지향 DBMS인 O2 DBMS를 기반으로 한다.
Lee, Seoyoung,Lee, Seunghyun,Jo, Hyunjin,Bae, Sangki,Kim, Kimin,Song, Jiho,Cho, Younghwan,Kim, Jinsung,Ahn, Hyungsoo,Yang, Min 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol. No.
<P>The growth temperature dependence of self-aligned beta-Ga2O3 nanostructures grown on an r-plane sapphire substrate by using metal-organic chemical vapor deposition is reported. Periodic self-alignment of the beta-Ga2O3 grains was observed for certain growth temperature windows and the grain size of the beta-Ga2O3 structure varied in response to the growth temperature. At temperatures under 800 A degrees C, self-alignment of the beta-Ga2O3 structures was not observed. The self-alignment tendency began to appear at 900 A degrees C, and obvious self-alignment characteristics in a certain direction were observed at approximately 950 A degrees C. However, as the growth temperature was increased to more than 900 A degrees C the growth mode of the beta-Ga2O3 structure gradually deviated from the self-alignment mode, finally exhibiting a two-dimensional thin film mode at 1100 A degrees C. We surmise that the driving force of beta-Ga2O3 grain self-alignment is the surface-potential difference between the planar and the step regions of the substrate on an atomic scale, which originates from misorientation occurring during the r-plane sapphire cutting process.</P>
Modeling of an IPMC Actuator-driven Zero-Net-Mass-Flux Pump for Flow Control
Lee, Sangki,Kim, Kwang J.,Park, Hoon Cheol Sage Publications 2006 Journal of intelligent material systems and struct Vol.17 No.6
<P>In this article, a systematic design method on an ionic polymer-metal composite (IPMC)-driven zero-net-mass-flux (ZNMF) pump is introduced for the flow control on a micro air vehicle ’s (MAV) wing. Since IPMC can generate a large deformation under a low input voltage along with its ability to operate in air, and its easier manufacture in a small size, it is considered to be an ideal material for the actuating diaphragm. Several parametric studies, using numerical methods, were performed to find an optimal shape of the diaphragm in order to maximize the stroke volume. Through these parametric studies, electrode shapes and pressure effects on the stroke volume were investigated. It was also found that the resonance of the normal mode analysis of the optimal circle-shaped diaphragm would not affect the stroke volume because the computed fundamental frequency is much higher than the considered driving frequency range (40 Hz). Based on the optimal circle-shaped diaphragm, a prototype ZNMF pump, with a slot, is designed for the flow control on an MAV wing. By using the flight speed of the MAV considered in this work and the flow velocity through the pump ’s slot, the calculated non-dimensional frequency and the momentum coefficient ensure the feasibility of the designed ZNMF pump as a flow control device.</P>
Equivalent modeling for ionic polymer–metal composite actuators based on beam theories
Lee, Sangki,Park, Hoon Cheol,Kim, Kwang Jin Institute of Physics Publishing 2005 Smart materials & structures Vol.14 No.6
<P>Equivalent beam and equivalent bimorph beam models for IPMC (ionic polymer–metal composite) actuators are described in the ensuing paper. Important physical properties of IPMCs including Young’s modulus and electro-mechanical coupling coefficient were determined using the rule of mixture, bimorph beam equations, and measured force–displacement data of a cantilevered IPMC actuator. By using a beam equation with estimated physical properties, the actuation displacements of a cantilevered IPMC actuator were calculated to show an excellent agreement between the computed tip displacements and the measured data. Finite element analysis (FEA), along with the predetermined physical properties, was used to predict the force–displacement relationship of an IPMC actuator, which is key data to effectively design many engineering devices of interest. Indicated by the results from the FEA agreeing with the measured data, the proposed models can be adopted for modeling of IPMC actuators with advanced shapes and other boundary conditions. </P>
Lee, Sangki,Kim, Kwang J,Park, Il-Seok Institute of Physics Publishing 2007 Smart materials & structures Vol.16 No.3
<P>IPMC (ionic polymer–metal composite) actuators produce large bending displacements under low input voltages and are flexible enough to be implemented for biological and/or biomimetic applications. In this study, IPMC was considered for the development of a natural muscle-<I>like</I> linear actuator. For the purpose of design, numerical analysis was utilized to predict free strain and blocked stress of IPMC-based linear actuators, which we considered as the important parameters of a muscle-like actuator. An elementary unit composed of an IPMC and the base polymer, Nafion<SUP>TM</SUP>, was proposed for an effective linear actuator. In order to find an optimal design and evaluate the actuation characteristics of the proposed elementary unit, actuation displacement and force were numerically calculated. The calculated maximum free strain of the optimal elementary unit was 25% under an applied 2?V input. Also, brief experimental results are provided. </P>