대체장비를 고려한 항공기 부품 생산라인의 ARENA^TM 시뮬레이션 모델링 방법론

나상현,문덕희,Na, Sang Hyun,Moon, Dug Hee 한국시뮬레이션학회 2016 한국시뮬레이션학회 논문지 Vol.25 No.4

항공기 엔진부품을 생산하는 제조산업은 전통적인 주문형 제조방식을 따르며, 다품종 소량생산시스템이다. 또한 생산공장의 배치는 유사한 기능을 가지는 병렬 기계들이 공정별 배치 형태로 구성되어 있고 조립공정이 포함되는 Hybrid Job Shop이다. 더 나아가 다양한 대체장비를 가지고 있으며, 공정 경로도 다양하고, 조립공정도 포함되어 있다. 이와 같은 복잡한 시스템의 생산능력을 검증하기 위해서는 시뮬레이션이 가장 우수한 방법이며, 정확한 모델의 개발을 위해 고도의 시뮬레이션 모델링기술이 필요하다. 이 논문에서는 위에서 언급한 복잡한 특성을 가진 생산시스템을 효과적으로 모델링하기 위한 방법론을 소개하고, 실제 항공기부품 생산업체를 대상으로 시뮬레이션 연구를 수행한 사례에 대해 소개한다. The industry producing the parts of aircraft engines is a traditional order-made system with highly variety and small quantity, and the manufacturing system is the typical job shop with identical or non-identical multiple machines in a workstation. Furthermore, there are many alternative operations and alternative machines allowed in machining processes, and tremendous routings and assembly operations should be considered. Usually simulation is the most efficient technology to analyze such a complex system, and high modeling skills are required for developing the simulation models. In this paper, a case study on a company which produces the parts of aircraft engines is introduced, specially focused on simulation modeling methodologies for the complex system.

배드민턴 용품소비자의 관여도에 따른 국가대표 스폰서십 효과분석

나상현(Sang Hyun Na),송성진(Seung Jin Song),이승철(Seung Chul Lee) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43

The purpose of this study is to investigate the effect of badminton equipment consumers` involvement on the marketing effectiveness of national team sponsorship. In addition, by gauging the effectiveness of sponsorship in a relatively less popular sport, this study will provide insights that may be useful in facilitating the procurement of sponsorships in amateur sports in the future. A sample of 469 badminton club members were surveyed, and structural equation modeling was used for the statistical analysis. The results of the study are as follows: first, involvement with badminton activities had effect on involvement with badminton rackets; second, involvement with badminton rackets had effect on sponsor image; third, involvement with badminton rackets had no significant effect on equipment consumers` purchase intention; fourth, involvement with badminton racket had no significant effect on perception of quality of the sponsor; fifth, sponsor`s corporate image had effect on perception of quality of the sponsor; sixth, sponsor`s corporate image had effect on equipment consumers` purchase intention; lastly, perception of quality of the sponsor had effect on equipment consumers` purchase intention.

골프선수들이 인식하는 기업의 아마추어 골프대회 타이틀스폰서십 효과분석

나상현 ( Sang Hyun Na ),안형국 ( Hyung Guk Ahn ),이승철 ( Seung Chul Lee ) 한국스포츠산업경영학회 2011 한국스포츠산업경영학회지 Vol.16 No.2

본 연구는 아마추어 골프 선수들의 특성을 파악하고 기업의 아마추어 골프대회 타이틀스폰서십 활동이 기업이미지와 브랜드 태도 및 충성도에 미치는 영향을 규명하여 아마추어 골프대회 시장의 마케팅 기초자료를 제공하는데 목적이 있다. 이러한 연구목적을 달성하기 위하여 우리나라에서 개최되고 있는 아마추어 골프대회를 1차적으로 검색한 후, 기업이 아마추어 골프대회를 후원하는 대회를 선정하였다. 연구대상은 2009년 6월 9일부터 10일까지 제주도 오라 골프장에서 진행된 ``2009 박카스배SBS GOLF 전국시도학생골프팀선수권대회``에 참가한 아마추어 골프선수 183명을 대상으로 설문자료를 수집하였다. 자료분석을 위하여 SPSS 14.0을 이용하여 빈도분석과 요인분석신뢰도분석, 단순 및 다중회귀분석을 실시하였다. 분석한 연구결과는 다음과 같다. 첫째, 기업의 아마추어 골프대회 타이틀스폰서십 하위요인인 이미지제고활동은 기업이미지에 통계적으로 유의한 영향을 미치는 것으로 나타났으나 커뮤니케이션활동은 유의한 영향을 미치지 않는 것으로 나타났다. 둘째, 기업의 아마추어골프대회 타이틀스폰서십 하위요인인 커뮤니케이션 활동과 이미지제고 활동은 브랜드태도에 유의한 영향을 미치는 것으로 나타났다. 셋째, 브랜드태도는 기업이미지에 유의한 영향을 미치는 것으로 나타났다. 넷째, 기업이미지는 브랜드충성도에 유의한 영향을 미치는 것으로 나타났다. 다섯째, 브랜드태도는 브랜드충성도에 유의한 영향을 미치는 것으로 나타났다. This study explores effects of sport sponsorship in relatively neglected domain of amateur sporting event settings. amateur sporting event or circuits are critical in that they often serve as the breeding grounds of professional-bound prospects. Despite its significance, amateur sporting events lack self-sustainability due to pecuniary reasons, and they often rely on sponsorship dollars for their operation and existence. Thus, it is imperative for the practitioners to be able to present merits of amateur sport event sponsorship to their potential corporate sponsors as they are evidenced in numerous studies on professional sport settings. Although a number of research projects have determined that sports sponsorship affects customer behavior, including recall of the sponsorship (Slattery & Pitts, 2002), attitude toward the corporate (Bennett, Henson, & Zhang, 2002), and intention to purchase the product, few studies have examined how title sponsorship effects internal customers (e.g. players). This study investigates the affects of sponsorship activities (i.e. communication activities and image enhancement activities) on corporate image and brand attitudes, which in turn, will affect brand loyalty. It should be noted that the subjects of this study were the participants of the event instead of the event attendees because they are, too, potential consumers (e.g. internal customers), and may provide fresh insights. One hundred eighty-five amateur golfers between the ages of 14 and 19 participating in 2009 Bacchus SBS Golf National Student Golf Tournament were surveyed, and 183 surveys were collected. Out of 183 surveys retrieved, 5 incomplete surveys were excluded, and remaining 178 surveys were used for multi regression analysis. The findings from the result of analysis were as follow: First, image enhancement activity influenced corporate image among amateur golfers, while communication activities did not; second, communication activity and image enhancement activity influenced brand attitude of the amateur golfers; Third, corporate image influenced brand attitude; fourth, brand attitude influenced corporate image; fifth, corporate image influenced brand loyalty; sixth, brand attitude influenced brand loyalty. The implication on this result is that sponsorship activities have positive effects on corporate image and brand attitude, which in turn, have positive effect on brand loyalty. Given that the participants of the events are, too, potential consumers; this study suggests that it would be worthwhile for corporations to enhance corporate image, brand attitude, and brand loyalty among potential consumers through marketing efforts such as amateur sport event sponsorships.

항공 응용 분야 : 서비스 스케이프와 스포츠 참여도와의 관계 연구

나상현 ( Sang Hyun Na ),한혜숙 ( Hye Sook Han ),김정순 ( Jung Sun Kim ) 한국항행학회 2010 韓國航行學會論文誌 Vol.14 No.6

본 논문은 스포츠 산업은 미국에서 지난 수 십년 동안 계속해서 발전해오고 있으며, 그것은 전문가들에게 있어서 후원자의 수를 증가시키는 주요한 원인이 되고 있다. 이 기회를 스포츠 관련 기관에게 있어서 최고의 이익으로 전환시키기 위하여, 전문가들이 당면한 과제는 스포츠 활동에의 적극적 참여를 유도하는 것과 재방문(지속적 참여) 요소를 홍보하는 것이다.지금까지 많은 연구들은 스포츠 활동의 참여 정도에 영향을 미치는 변수들을 확인하려고 노력하였다. 하지만 변수들 중 많은 부분은 스포츠의 본질성과 불확실한 장소로부터 파생 되는 우연성으로 인하여 다소 통제하기가 힘든 특징을 가지고 있다. 그러므로 경쟁력 확보와 수익의 극대화를 위하여 관리자들이 통제 가능한 요소를 찾아내고 이해하기 위한 노력이 필수적이다. 이 연구는 스포츠 활동의 참여에 영향을 미치는 통제 가능한 많은 변수들이 1992년 이후 환대산업에 널리 쓰여진 ‘서비스 스케이프’요소와 일치한다는 것을 알아냈다. ‘서비스 스케이프’의 개념적 모형에 비추어 보았을 때, 이 연구는 스포츠 활동 참여를 증가시킬 수 있는 통제 가능한 변수들을 분리시키는 시도이기도 하다. 스포츠 산업의 개념으로서 ‘서비스 스케이프’의 적용을 증진시키는 점에서 뿐만 아니라 더 나아가 이 변수들을 증명하고 변수들간의 관계를 측정하고, 그리고 스포츠 참여의 영향력을 평가하는 미래에 있을 실증적 연구에 대한 의견을 제공하는 점에서 이 연구는 중요하다고 할 수 있다. The sport industry has been continuing to grow in the past few decades in the U.S., and it presents significant opportunities for the practitioners to increase the number of patrons. To convert this opportunity to optimum benefits for a sport organization, one of the most significant challenges for the practitioners would be promoting sport attendance and repatronage. So far, many studies have tried to identify variables that affect the level of sports attendance. However, many of these variables are rather uncontrollable due to the nature of the sports and contingencies that are derived from many areas of uncertainties. Thus, to acquire competitive advantage and profit maximization, it would be essential for the managers to focus on understanding controllable elements. This study found that many controllable variables that influence sports attendance coincide with the servicescape elements which have been widely used in the hospitality industry since 1992. In the light of the conceptual framework of servicescape, this study also attempted to isolate the controllable variables that can be utilized to increase the sports attendance. This study presents its significance not only in extending the application of servicescape concept to the sport industry, but also in providing suggestions for future empirical studies that would further identify these variables, gauge the relationship between those variables, and assess its impact on the sports attendance.

Effect of Zone-Drawing Conditions on the Structure and Physical Properties of Ultrahigh Molecular Weight Polyethylene Single Crystal Mats

김상용,나상현,설창,Kim, Sang-Yong,Na, Sang-Hyun,Seoul, Chang The Korean Fiber Society 1988 한국섬유공학회지 Vol.25 No.6

Effect of zone-drawing conditions (draw temperature and draw ratio) on the structure and properties of the ultrahigh molecular weight polyethylene(UHMWPE) single crystal mats(SCM) was investigated. Mats were made by slow filtering and drying of single crystals crystallized in the dilute xylene solution of UHMWPE. These mats have platelike lamellar structure with mp 137$^{\circ}C$ and crystallinity 0.71. High draw ratio up to 40 was obtained by zone-drawing of the UHMWPE SCM near melting temperature. The birefringence, crystallinity, tensile modulus and breaking tensile stress of drawn mats appeared not to depend on the draw temperature but increased with increasing draw ratio. The maximum tensile modulus obtained in this experiment was 78 GPa.

C급 자재의 eVMI효과분석을 위한 시뮬레이션 연구

황구주(Gu Ju Hwang),나상현(Sang Hyun Na),문덕희(Dug Hee Moon) 한국SCM학회 2013 한국SCM학회지 Vol.13 No.2

Vendor Managed Inventory (VMI) has been well known strategy in a supply chain due to its benefits such as fewer shortages, lower inventory levels and higher sales. In this paper a simulation study on a supply chain that consists of multiple suppliers who produce C-parts such as fasteners, and a single manufacturer who produces industrial pumps is considered. The effectiveness of an eVMI system which uses electronic balances and web-based management system is analyzed with respect to the total logistics cost. The simulation results indicate that the most cost savings are obtained from the decrease of line stop caused by the shortage of parts.

스포츠센터 종사자의 직무탈진이 조직성과에 미치는 영향

변원태(Won Tae Byeon),진승태(Seung Tae Jin),나상현(Sang Hyun Na) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43

This study is to examine the between burnout and organizational performance in sports center`s employees The subjects of this study were a total of 200 sport center employees. The sampling of this study practiced on convenience sampling method. The method of the statistical analysis used in this study, were exploratory factor analysis and structural equation modeling. As a result of these data analysis, the conclusions of this study are as follows. These results suggest that job efficacy was positive and significantly related to organizational identification. but cynicism and emotional exhaustion was negative related to organizational identification. Organizational identification was positive significantly related to organizational citizenship behavior.