고분자압출성형용 Single-Screw에 관한 열유동 기초연구

정효희,김재열,고명석,최승현,심재기,한재호 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

Extrusion Screw, point parts of extrusion molding extruder, is expanded widely use area with construction machinery, site conveyance device food processor, medicine as well as Polymer extrusion forming. Because this can expect large quantity demand about Screw of special quality of extrusion Screw item, is become processing industry that adopt all kinds of small quantity production type. Accordingly, analysis by extrusion screw is also consisting of several directions. Extrusion screw differentia is appeared much at material selection of screw itself and each screw design as parts that cause a lot of high temperature and high tension and attrition among processing of product and use purpose and that should do it so that working conditions back according to kind of used balance may optimize of each Screw are desirable. In this treatise, analyzed and analyze single-screw that is using developing in Human Resource Training Project for regional Innovation subject considering pressure, temperature etc.. of extrusion screw using CFdesign that is 3 dimensional analysis program.

Differential effects on the MICE sustainability and customer loyalty perceived by domestic and international attendees

정효희,김철원 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.30 No.-

The objective of this study is to explore differential effects of the sustainability perceived by domestic and international participants in the MICE (Meetings, Incentive Travel, Convention, and Exhibition) held in the Republic of Korea and to examine the relationship between customer loyalty and perception of the sustainable MICE. In this study, 30 sustainability variables for the MICE were extracted and tested by the factor analysis, representing four underlying dimensions: economic sustainability, social sustainability, environmental sustainability and event sustainability. The results revealed that significant differences in these four dimensions of the sustainable MICE were perceived by domestic and international participants. The largest difference were perceived by domestic and international participants with respect to the environmental sustainability factor. The mean scores indicated that international participants tended to give higher evaluations than domestic participants. Second, there were statistically significant relationships among economic, environmental, and event sustainability factors and customer loyalty from the perspective of international participants. For domestic participants, only event sustainability had a vital relationship with customer loyalty. The study implied how policy makers and the MICE managers should adopt four dimensions of sustainability to establish a harmonious and sustainable MICE practices.

압출용 다이스의 Melt-고분자 열유동 기초연구

정효희,김재열,최진호,유신,윤성운,홍철,김종문 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

As importance part of extruder, hopper(Hopper) been raw material supply wealth, main frame that screw and barrel that transformation of supply raw material attains are because deformed raw material is fearful finally extrusion to done dies attain. Extruder is divided by greatly above 3 but hopper has assembled in dehumidification of raw material and supply of smooth raw material, and make in Melt state as raw material is stabilized because main frame consists of screw and barrel and Melt does anaphora as done material is stabilized. And dies that is last part between barrel with screw anaphora done Melt material as is stabilized without causing change that is much depending on anaphora of screw from dies way out as correct product produce make to. In this treatise, make anaphora can present ideal dies basis design using CFdesign that is heat & flow analysis programs so that can produce detailed product through pipe channel flow analysis of stable dies applying anaphora value of do polymer raw material in Screw.

고분자튜브용 Single-Screw 압출시스템의 동적특성 해석

김재열,정효희,최승현,최진호,홍철 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

Today, Screw model used in extrusion molding of to analyze various simulation notations as well as an experiments use, and is using because among them, third dimension technique among present technique accomplishes most troop. Because that third dimension uses technique does not attain explanation that is correct in model who curt analysis notation on two-dimension has complex shape structure. Is studying measurement of shape of extruder of complicated structure or frictional force of polymer balance and density, applied mechanism accordingly using third dimension technique. Single screw system, analysis target of this treatise, is extruder that extrusion molding that use most polymer resin consists. Most single screw extruder is excellent transfer in melting state of polymer balance, but there are some shortcomings. Melting of polymer balance and color dithering of balance are difficult and high heat of increase of screw speed of revolution to increase done balance quantity produces anaphora along with unmeasured shear force increase. Single screw that have this a lot of controversial points in addition to achieving dynamic analysis of single screw extruder of polymer tube that get into nature of a treatise that use CFdesign that is heat/flow analysis program production stability in single screw extruder system for polymer tube analysis achieve wish to.

중국인 관광객들의 지속적인 국내 관광을 유도하기 위한 마케팅 전략 분석

정효희(Xiao Xi Cheng),이대휘(Dae Hui Lee) 한국관광연구학회 2013 관광연구저널 Vol.27 No.4

The purpose of this study is to examine the relationships among tourism motivations, tourism satisfaction, revisit intention, and word-of-mouth by Chinese tourists who visited South Korea. The five tourism motivation factors used in this study were novelty, escape, knowledge-seeking, socialization, and attractions. The results of multiple regression analysis indicate that only attractions and knowledge-seeking had a significant positive effect on tourism satisfaction. Moreover, attractions not only had the strongest predictor of tourism satisfaction but also the only factor that had a significant positive effect on revisit intention. Tourism satisfaction, revisit intention, and word-of-mouth were positively related at the observed significant level. The findings of this study may be useful in enticing Chinese tourists to visit South Korea and increasing their tourism satisfaction, revisit intention and word-of-mouth.

컨벤션행사의 지속가능성이 브랜드자산 및 고객 충성도에 미치는 영향 연구

정효희(Cheng, Xiao Xi),김철원(Kim, Chul Won) 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.27 No.-

본 연구는 컨벤션행사의 지속가능성, 브랜드자산, 고객 충성도 간의 관계를 탐색하고자 하며 브랜드자산 요인이 지속가능성과 충성도 사이 미치는 매개역할을 검증하였다. 연구결과를 살펴보면, 지속가능성은 경제적, 사회적, 환경적, 행사적 4가지 요인들로 도출되었고 브랜드자산은 수행력, 사회적 이미지, 가치, 신뢰애착 5 가지 요인들로 분석되었다. 가설검증 결과는 (1)지속가능성요인들이 브랜드자산에 부분적으로 유의하고; (2)지속가능성요인들이 고객 충성도에 유의하며; (3)사회적 이미지와 애착이 고객 충성도에 유의한 영향을 미치는 것으로 검증되었다; (4)브랜드자산은 지속가능성과 충성도 사이에서 매개 역할을 하는 것으로 분석되었다. 본 연구결과는 컨벤션행사의 지속가능성에 대한 새로운 구조의 형성에 기여하면서 컨벤션 기획자들이 향후 한국 컨벤션 브랜드자산을 제고할 수 있는 단서를 제공하는 데 기여할 것으로 유추된다. The purpose of this study is to examine effects of sustainability of convention events on brand equity and customer loyalty. This paper also explores the mediating role of brand equity amid sustainability of convention events and customer loyalty. The four determinants ofsustainability of convention events examined in this study are economic sustainability, environmental sustainability, social sustainability and event sustainability. Brand equity refers to performance, social image, value, trust worthiness, and attachment. The findings are as follows: (1)most sustainability of convention events have a positive effect on each brand equity’s elements; (2)all sustainability of convention events have a positive effect on loyalty; (3)brand equity of convention is significantly related to customer loyalty. (4)brand equity plays a mediating role between sustainability of convention and customer loyalty. The findings will not only be useful in improving the structure of sustainability of convention events, but also in enhancing competitiveness in Korea’s convention industry.

Differential effects on the MICE sustainability and customer loyalty perceived by domestic and international attendees

Cheng, Xiao Xi(정효희),Kim, Chul Won(김철원) 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.30 No.-

The objective of this study is to explore differential effects of the sustainability perceived by domestic and international participants in the MICE (Meetings, Incentive Travel, Convention, and Exhibition) held in the Republic of Korea and to examine the relationship between customer loyalty and perception of the sustainable MICE. In this study, 30 sustainability variables for the MICE were extracted and tested by the factor analysis, representing four underlying dimensions: economic sustainability, social sustainability, environmental sustainability and event sustainability. The results revealed that significant differences in these four dimensions of the sustainable MICE were perceived by domestic and international participants. The largest difference were perceived by domestic and international participants with respect to the environmental sustainability factor. The mean scores indicated that international participants tended to give higher evaluations than domestic participants. Second, there were statistically significant relationships among economic, environmental, and event sustainability factors and customer loyalty from the perspective of international participants. For domestic participants, only event sustainability had a vital relationship with customer loyalty. The study implied how policy makers and the MICE managers should adopt four dimensions of sustainability to establish a harmonious and sustainable MICE practices.

열가소성고분자 압출성형 시스템 개발 및 기초연구

김재열(JaeYeol Kim),정효희(HyoHee Jung),고명석(MyungSeok Ko),최승현(SeungHyun Choi),최진호(JinHo Choi),김종문(JongMun Kim),홍철(Cheol Hong) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.6

Have preserved perfectly polymer raw material of solid state or High horoscope at process at extrusion process and try much to heighten precision of raw material supply and processing perfectly. It is extrusion Screw and temperature pressure control system been hopper system and the most important parts among parts used at extrusion process. In printer roller incrustment development that is main target of system development applying system developed in research that serve that a lot of problems appear and supplements the problem in each system in case of operate extrusion system using heat range plasticity raw material among polymer raw material thus to extrusion molding system that use thermoplasticity polymer raw material correct and quantitative target achievement possibility will be done and will produce epoch-making and stable product in extrusion process that uses thermoplastic polymer raw material.

전시컨벤션센터 서비스품질이 고객만족도 및 기업성과에 미치는 영향 분석

이대휘(Dae Hui Lee),정효희(Xiao Xi Cheng) 한국관광연구학회 2015 관광연구저널 Vol.29 No.1

The purpose of this study is to examine the relationships between corporate performance of the Coex Convention and Exhibition Center, service quality, and customer satisfaction. The six determinants of service quality examined in this study are professionalism, creativity, responsiveness, support, amenity, and aesthetics. The main findings are as follows: (1) professionalism, creativity, responsiveness, amenity, and aesthetics are significantly related to customer satisfaction; (2) professionalism, creativity, responsiveness, support, and amenity are significantly related to corporate performance of the Coex Convention and Exhibition Center; and (3) customer satisfaction is significantly pertinent to corporate performance of the Coex Convention and Exhibition Center. Among the six determinants of service quality examined in this study, professionalism is the most important factor that influences both customer satisfaction and corporate performance. The professionalism of event organizers, such as Professional Exhibition Organizers (PEO) and Professional Convention Organizers (PCO), is highly valued by customers and corporations, who rely upon professionals to plan, manage, and operate high-quality conventions and exhibitions. Professional event organizers are imperative to enhance customer satisfaction and corporate performance in the convention and exhibition industry. The findings will aid marketing development strategy, improve corporate performance of convention and exhibition centers, and enhance competitiveness of the convention and exhibition industry in Korea.

최적설계 기법을 적용한 1톤 운반차용 P.T.O축 및 트랜스미션 개발에 관한 기초연구

김재열,심재기,최승현,정효희,김훈조,오현중,박경섭 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

Now, power tillers and cultivators which are spread among fruit tree households have usage, low application, and high accident risk. Therefore, the development of multi-purpose work vehicles is needed as an alternative for these problems. Especially, easy usage and the ability to easily change gears when driving and the development of the P.T.O for various tasks such as pruning, water lifting, pest control, application and, mowing are needed. In this research, we will develop a transmission with design on P.T.Oaxle for agricultural work vehicles including multi-purpose vehicles. We aim to develop a 4-wheel drive transmission of synchronous contact type for practical use in fruit tree households which is required to be a large-sized agricultural vehicle. Therefore, we have per performed as follows that are composed of load capacity from 500kg to 1,000kg, safety securing for passengers, and drive securing under bad conditions of the topography slope and swampy land and the rest. For this purpose, we have developed a prototype vehicle through strength analysis of transmission design. we have selected optimal design conditions (Optimal RPM and torque according to some works) on the power transmission with multi-purpose vehicle for various jobs: spraying, manure spreading, mowing, brush wood chopping. If development of the P.T.O containing variable RPM and torque is successful, the following tasks can be possible. Air pruning, air maintenance, water lift, pest control, application, mowing, spraying, and brush wood chopping are possible with this developed P.T.O. Methods and contents for research are followed. Therefore, we have achieved performance-tests through the prototype of the multi-purpose work vehicle and have improved on troubles by the analysis of results of R&D. Also, we provided solutions to problems in mass production in the future.