• 한국기계가공학회지
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• 제17권5호
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• pp.137-142
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• 2018

With the development of the electronic-materials industry, multi-functional metal-composite materials with high thermal conductivity and low thermal expansion must be developed for high reliability and high life expectancy. This paper is a preliminary study on the manufacturing technology of gas reaction control composite material, focusing on the prediction of the equivalent thermal properties of Al-AlN composite materials. Numerical equivalent property values are obtained by using finite element analysis and compared with theoretical formulas. Al-AlN composite materials should become the optimal composite material when the proportion of the reinforcing phase is less than 0.5.

• 산업공학
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• 제20권3호
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• pp.288-297
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• 2007

Success of semiconductor/LCD industry depends on its yield and quality of product. For the purpose, FDC (Fault Detection and Classification) system is used to diagnose fault state in main manufacturing processes by monitoring time series data collected by equipment sensors which represent various conditions of the equipment. The data set is segmented at the start and end of each product lot processing by a trigger event module. However, in practice, segmented sensor data usually have the features of data asynchronization such as different start points, end points, and data lengths. Due to the asynchronization problem, false alarm (type I error) and missed alarm (type II error) occur frequently. In this paper, we propose a robust process fault detection system by integrating a process event detection method and a similarity measuring method based on dynamic time warping algorithm. An experiment shows that the proposed system is able to recognize abnormal condition correctly under the asynchronous data situation.

• 보건의료산업학회지
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• 제13권2호
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• pp.121-133
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• 2019

Objectives: The purpose of this study was to determine the effectiveness of hand acupressure in relieving shoulder pain among male manufacturing workers. Methods: A nonequivalent control group was employed using a nonsynchronized design. Data were collected from two manufacturing plants located in metropolitan area U. The data were analyzed with a ${\chi}^2$-test and an independent t-test to perform a homogeneity test, and with repeated ANOVA measures to perform an hypothesis test using the SPSS 21.0 program. Results: Hypothesis 1 that "the experimental group provided with hand moxibustion would score lower for low shoulder pain than the control group" was supported (F=306.05, p<.001). Hypothesis 2, that "the experimental group provided with hand moxibustion would have a wider range of motion than the control group" was also supported with increased flexion(F=7.73, p<.001), extension(F=7.89, p=.001), abduction(F=21.23, p<.001), and horizontal abduction(F=20.89, p=.028). Hypothesis 3, that "the experimental group provided with hand moxibustion would score lower for quality of sleep than the control group" was not supported (F=56.10, p=.091). Conclusions: Hand moxibustion is effective in relieving shoulder pain for male manufacturing workers, in relieving low shoulder pain and increasing the range of motion.

• 산업경영시스템학회지
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• 제39권4호
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• pp.125-136
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• 2016

The external R&D, which includes the adoption of the external technology and knowledge in addition to the internal R&D, is one of important factors for the innovation. Especially for small and medium-sized enterprises (SMEs), the external R&D has been considered as a key factor to carry out the innovation more efficiently due to the limitations of their resources and capacities. However, most of extant studies related to external R&D have focused on analyzing the influence of external R&D on innovation outputs or outcomes. Only a few studies have explored the impact of external R&D on the innovation efficiency. This study therefore investigates whether the external R&D effects the industry's innovation efficiency and productivity. On this study, we used Korean manufacturing industry data of SMEs from 2012 to 2014 and employed a global Malmquist productivity analysis technique, which is based on the Data Envelopment Analysis (DEA), to assess the innovation efficiency and productivity. Innovation performances of external R&D group and internal R&D group are compared. Then, the sectoral patterns of both innovation efficiency and productivity are analyzed with respect to the technological intensity, which is introduced by OECD. The results show that the gap of innovation efficiency between external and internal R&D groups has gradually decreased because of the continuous improvement of the external R&D group's performance, while the external R&D group lag behind the internal R&D group. In addition, patterns of the innovation efficiency and productivity change were different depending on the technological intensity, which means that the higher the technological intensity, the greater the effect of external R&D.

• 자원ㆍ환경경제연구
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• 제25권2호
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• pp.277-297
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• 2016

본 연구는 기후변수들의 변동 특성이 한국 제조업의 총요소생산성에 미치는 영향을 분석하였다. 대표적인 기후변수인 기온, 강수량, 습도는 노동효율성에 부정적인 영향을 미칠 것으로 예상되므로 기온, 강수량, 습도의 변동특성이 한국 광역자치단체 제조업 총생산성에 미치는 영향을 분석하였다. 본 연구는 최근 기후변화로 기후 변동성이 높아지는 현상을 고려하기 위해 기후변수들의 평균값뿐만 아니라 최고값을 고려하여 분석하였다. 선형회귀분석 결과 선행연구 결과와 달리 기온과 습도가 제조업 생산성에 유의미한 영향을 미치지 않았다. 강수량의 평균적 증가는 부정적 영향을 미치는 것으로 분석되었다. 패널자료를 분석한 결과에서는 기온, 강수량 모두 제조업 총생산에 유의미한 영향을 주지 않는 것으로 나타났다. 반면 평균 습도의 상승은 제조업 총생산을 증가시키는 것으로 나타났다. 실내 작업이 많은 제조업의 경우 기후자체의 변화보다도 기업체들의 적응능력이 생산성 변화와 직접적인 관련이 있다. 한국 제조업의 경우 기온이나 습도의 변화가 급격하게 이루어지지 않고 있고, 냉난방 시스템 구축 등을 통해 기후변화에 잘 적응하고 있는 것으로 분석된다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권1호
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• pp.69-76
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• 2017

오늘날 환경의 변화가 매우 빠르고 복잡하기 때문에, 기업들은 내부 R&D만 수행하여 생존하거나 지속적인 경쟁우위를 확보하기는 어렵다. 이에 따라 개방형 혁신에 관한 패러다임이 강조되고 있으며, 다양한 산업들에서 외부 R&D의 비중이 점점 증가하고 있다. 본 연구는 과학기술정책연구원(STEPI)에서 수행한 한국기업혁신조사(KIS)의 데이터를 통해 개방형 혁신을 분석하였다. 한국의 제조업에 해당하는 기업들을 중심으로 개방형 혁신의 비중을 확인하였고, 개방형 혁신과 혁신 성과 간의 관계를 분석하였다. 분석 결과, 개방형 혁신은 과거에 존재하지 않았던 새로운 패러다임이 아닌 것을 확인하였다. 또한 정부지원제도의 활용은 혁신 성과에 긍정적인 영향을 미친 반면, 외부 R&D의 활용은 관리의 어려움으로 인해 혁신 성과에 영향을 미치지 않는 것으로 나타났다. 본 연구의 결과는 향후 기업들이 혁신 활동을 수행할 때 전략적인 방향을 마련하거나 의사결정을 지원하는데 기여할 수 있을 것이다.

• 경영과학
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• 제34권3호
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• pp.15-41
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• 2017

The purpose of this study is to analyze the effects of the BSCs of 642 firms excluding the financial and insurance companies listed on KOSPI. The analysis of financial performance through analysis of major financial ratios between BSC and non-BSC firms is compared with the input of human and material resources for business growth. We will promote the spread of BSC and examine the areas differentiated performance improvement. The analytical categories are manufacturing, service, wholesale and retail, and information and communications, which are 2,136 business years out of 2,378 final analytical samples. The results of the analysis are as follows. As a result of the analysis, among the four industries analyzed, the industries that showed the best performance were manufacturing. In the case of service industry, growth and activity were lower than those of non-adoption (NA) companies, but the operating margin was significantly different from manufacturing. However, market value was higher than that of NA companies, and R&D expenditures and advertising expenses were significantly higher than NA firms. On the other hand, there was no significant difference in profitability between the BSC and NA firms, but the market value was very significant. EPS is 5.22 times, BPS is 5.64 times, PBR is 1.3 times, and EVA is 35 times higher. In addition, R&D expenditure and advertising expenditure are more than twice as high as those of NA. In the case of the service industry, there is no significant difference in the growth performance from the NA firms. Activity indicators, BSC introduced companies are three times lower than both the total assets turnover and the capital turnover rate. The operating profit margin was high at 45.8% for introduced companies and 37.2% for non-introduced companies. In market value analysis, only BPS was 1.68 times higher. On the other hand, investment in welfare expenses is 0.2% of total assets, which is relatively low compared to NA firms. However, research and development expenses and advertising expenses are 2.1% and 1.02% of total assets, respectively, but they are relatively lower than those of NA firms. Unlike the manufacturing and service industries, wholesale and retail trade was significantly higher than the NA firms in terms of sales growth and total assets growth rate. In terms of market value, EPS and BPS were significantly higher, but the benefits, R&D expenditures, and advertising expenses were lower than those of NA firms. The information and communication industry showed lower level of performance than the NA firms in all indicators except cash liquidity, BPS, and EVA.

• 한국의류학회지
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• 제15권3호
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• pp.251-262
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• 1991

The roles of fashion merchandisers (merchandise managers) in women's apparel industry and their perceptions of the job requirements as a fashion merchandiser were investigated to understand present fashion merchandising activities in the industry and suggest desirable roles of fashion merchandiser for further development of the industry. The research questionnaires were administered to fashion merchandisers working in the ten national brand women's apparel firms. The results of the study were as follows . 1. Annual sales volumes of most surveyed firms were more than five billions won and eight out of ten surveyed firms have fashion merchandisers in their firms. 2. Fashion merchandisers worked at a specific brand merchandising division sales and operations division or merchandise planning division. A fashion merchandiser generally supervised one brand. 3. Fashion merchandiser's work experience ranged from four to fifteen years showing a great deal of experience in the apparel industry. Their majors at university were mostly business and few majored in clothing and textiles, or textiles. 4. In general, the role of fashion merchandiser was a management specialist who was responsible for identifying target markets analyzing fashion trends, planning of the merchandise development budget planning, manufacturing planning, selling, advertising and sales promotion and distributing the merchandise. At some firms fashion merchandi-sers were not responsible for advertising, display, and receiving the orders. 5. Surveyed fashion merchandisers perceived the desirable fashion merchandiser's role as a management specialist conducting overall business activities in the areas of merchandise planning, manufacturing, selling and distribution. They also mentioned the following personal characteristics such as vision leadership, and persuasion as desirable characteri-stics for those who aspire to a career in fashion merchandising. 6. Surveyed fashion merchandisers emphasized relevant and realistic experiences in fashion merchandising education. Several ways were suggested to help the educator keep in touch with business and bring reality to students. They are . field work, bringing professionals into the classroom to speak to the students, emphasizing clothing and textiles education including merchandising area, and establishing a Department of Fashion Merchandising.

• Journal of Korea Trade
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• 제25권7호
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• pp.1-18
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• 2021

Purpose - In this study, we explore the relationship between the degree of internationalization (DOI) and firm performance (DOI-P) of small and medium-sized enterprises (SMEs) in the manufacturing sector. Specifically, we investigate whether the costs and benefits dynamics concerning the internationalization of SMEs differ between high-tech and non-high-tech industries. Design/methodology - We extend the prior literature on this relationship by employing 5-year data on 589 Korean SMEs in the manufacturing sector and examining the moderating impact of the industry characteristics. Our findings reveal a U-shaped relationship between the DOI and SME performance. High-tech SMEs demonstrate an inverted U-shaped relationship, whereas non-hightech SMEs exhibit a U-shaped relationship. Findings - Our findings illustrate the importance of the industry factor in testing the performance impact of the internationalization of Korean SMEs. By incorporating industry dynamics, our results indicate that the DOI-P relationship depends on the context of the industry in which an SME operates. High-tech SMEs also display a higher DOI but are outperformed by non-high-tech SMEs for the entire internationalization path, which implies that high-tech SMEs face more challenges than non-high-tech SMEs while seeking internationalization. Originality/value - The findings strongly validate that significant benefits exist for SMEs undertaking internationalization. We also employ the contextual framework contributing to increasing the understanding of the intrinsic value of internationalization and resolving the mixed results issue on the DOI-P relationship, by illustrating that the industry factor leads to different dynamics of costs and benefits of SME internationalization; it also determines the shape and direction of the relationship.

• 한국산업융합학회 논문집
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• 제25권6_2호
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• pp.1111-1117
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• 2022

Recently, interest in the circular economy has emerged in the industry. As a result, interest in Re-manufacturing, which makes old equipment similar to new products, is growing. In the machine tool industry with many aging equipment, the Re-manufacturing industry is essential, and among them, research on the performance improvement of gear type oil pumps was conducted. The purpose was to achieve the target performance of flow rate and volume efficiency by changing the shape of the gear pump housing clearance and inlet/outlet, and Computational Fluid Analysis and Central Composite Design were conducted using ANSYS CFX 2022 R2 and MINITAB®. The level of each determined factor was determined. 20 design points were derived, and the Flow Rate at each design point was calculated, and the Theoretical Flow Rate was calculated to obtain Volumetric Efficiency. The optimal design point was obtained when the Flow Rate was 140 lpm and the Volumetric Efficiency was maximum, the optimal design point was obtained when both were maximum, and the Surface Plot for each factor was obtained to identify the tendency.