• 한국공작기계학회논문집
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• 제15권2호
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• pp.24-29
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• 2006

The use electron-beam(E-beam) manufacturing system provides a means to alleviate optic exposure equipment's problems. We are developing an E-beam manufacturing system with scanning electron microscope(SEM) function. The E-beam manufacturing system consist of high voltage generator, beam blanker, condenser lenses, object lenses, stigmator and stage. The development of E-beam manufacturing system is used on the method of remaking SEM's structure. The functions of SEM are developed. It is important for the test of E-beam performance. In E-beam manufacturing system and SEM, beam focus is important function. In this paper, we propose intelligent remote control function for beam focus in E-beam manufacturing system. The function extends the user's function and gives convenience.

• 컴퓨터교육학회논문지
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• 제22권3호
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• pp.37-54
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• 2019

STEM 융합교육의 중요한 목적은 서로 다른 학문이 가지는 탐구의 방법을 이해함으로써 융합적 문제해결력을 기르는 것이다. 이를 위해 우선적으로 각 학문에서 중요하게 다루어지는 문제해결과정을 이해해야 한다. 본 연구는 과학(S), 공학(E), 수학(M) 각각의 분야에서 어떻게 문제해결과정을 정의하고 있는지 비교분석하고, 이를 근거로 SEM 문제해결과 CT 문제해결의 관련성을 파악하고자 하였다. 이를 위해 먼저 SEM 각 학문의 문제해결과정을 비교 분석하여 그 공통점과 차이점을 기술하였다. 다음으로 CT를 도구적 측면과 사고적 측면으로 구분하고 문제해결과정으로서 CT가 SEM 각각의 학문에서 문제해결과 어떤 차이가 있는지 기술하였다. 마지막으로, SEM 문제해결 프로세스와 CT와의 관계를 모형으로 제시하였다. 본 연구는 문제해결과정으로써 CT와 SEM이 융합할 수 있는 방향을 제시한다는 점에서 그 의미가 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.154-157
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• 2005

The use of electron-beam(E-Beam) manufacture systems provides a means to alleviate optic exposure equipment's problems. We designed an E-beam manufacture system with SEM function. Optimal beam scanning is one of the most important conditions in the performance of E-beam and SEM. The performance of E-beam manufacture system and images of SEM are a close affinity with each other. Developed E-beam manufacture system consist of the controllers of high voltage, scanning, optic and high voltage generator. In this paper, we analyze the condition of steady beam scanning and describe the development of controller fer optimal beam scanning.

• 격월간물류
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• 통권22호
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• pp.45-47
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• 2007

• 유통과학연구
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• 제22권9호
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• pp.13-25
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• 2024

Purpose: This study explores the complex interplay between service quality, customer engagement, and loyalty in the e-commerce sector, examining the moderating effect of technological adoption on these crucial relationships. Research design, data and methodology: Employing a robust multi-method approach, the research analyzes data from 481 e-commerce users, leveraging the complementary strengths of partial least squares structural equation modeling (PLS-SEM) and fuzzy-set qualitative comparative analysis(fsQCA). Acomprehensive multi-group analysisis conducted to uncover differences between experienced and non-experienced users. Results: PLS-SEM reveals that service quality significantly influences customer engagement, which in turn drives loyalty. Technological adoption positively moderates the service quality-engagement relationship. The multi-group analysis uncovers notable differences between user segments. fsQCA identifies two distinct configurational paths consistently leading to high customer loyalty: high customer engagement and high service quality. Conclusions: This study's innovative integration of PLS-SEM and fsQCA contributes to a deeper understanding of the intricate dynamics driving e-commerce success. Findings provide actionable insights for e-commerce businesses to enhance service quality, foster engagement, and cultivate loyalty. This research lays the groundwork for further exploration of these critical relationships in different contexts, offering a nuanced perspective on the complex interplay of factors shaping customer behavior in the digital marketplace.

• 한국전자현미경학회:학술대회논문집
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• 한국현미경학회 2003년도 제34차 춘계학술대회
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• pp.25-27
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• 2003

• Journal of the korean society of oceanography
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• 제39권4호
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• pp.243-250
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• 2004

Sediment microcosm experiments were conducted for 14 and 28 days using Zn spiked sediment to examine the changing distribution of bioavailab1e sediment-bound Zn at different SEM (simultaneously extracted metal)-Zn/ AVS (acid volatile sulfide) mole ratios as a function of time and amphipod density. In surficial sediments (0-1cm), AVS concentrations significantly decreased due to bioturbation and oxidation, while SEM-Zn concentrations remained unchanged. As a result, SEM-Zn/AVS ratios in the surface sediment were greater one although the ratios were designed as less than one initially. With increasing SEM-Zn/AVS ratios in surficial sediments, concentrations of potentially bioavailable $MgCl_2$extractable-Zn, NaOAc extractable-Zn and pore water-Zn significantly increased, while concentrations of SEM-Zn were not significantly varied. Results suggested that as AVS concentrations decreased, AVS bound Zn was partitioned to other sediment fractions (i.e. $MgCl_2$ and NaOAc extractable) and the pore water, resulting in changes in Zn bioavailability in surficial sediments. Concentrations of AVS, SEM-Zn and pore water-Zn remained unchanged in the deeper layers (>1 cm) of the sediment.

• 대한인간공학회지
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• 제26권1호
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• pp.87-92
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• 2007

KTX (Korea Train eXpress) is launched as the $5^{th}$ develop a ride-comfort model for high-speed rail pasengers using structural equation model (SEM). Both qualitative and quantitative factors affecting ride-comfort were investigated, and employed to construct a comprehensive ride-comfort model. The SEM model was built with twenty measurement variables and seven latent variables for the evaluation of ride-comfort of high-speed train passenger. A total of six hundreds thirty two subjects participated in the evaluation using face-to-face survey method. As a result, the proposed SEM model model fitnes (GFI=0.93). According to the results, overall ride-comfort was significantly affected by the seat-, fatigue-, interior-related, and customer satisfaction variables such as fare. Among the engineering design variables of high-speed train, seat-related variables were identified as critical factors of the ride-comfort. It is expected that the result of this study could be useful for the enhancement of ride comfort in next generation KTX.

• 경영과학
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• 제28권1호
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• pp.25-42
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• 2011

The mobile industry is the key foundation of digital convergence, and its constant growth is expected. Among mobile industries, new products leading the development of devices are the Emerging Device. This study is conducted to find out factors making differentiated by comparing the structural equation model(SEM) of the Tablet PC and the e-Book Reader. The main findings are as follows. First, the application of TAM to the Emerging Device shows that fitness of the model is generally high but the effect of Perceived Ease of Use has not been verified or found insignificant. Second, the acceptance model of the Tablet PC and the e-Book Reader has found that playfulness stimulates acceptance intentions. Third, the cost level of the Emerging Device acceptance model is not a factor stimulating consumers' acceptance intentions. Fourth, product attributes of the Tablet PC and the e-Book Reader to differentiate themselves from the other device are Functionality and Playfulness respectively.

• 한국자원식물학회지
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• 제20권5호
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• pp.437-441
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• 2007

Agrobacterium tumefaciens에 의해 일미벼 품종에 도입하여 많은 형질전환벼를 생산했다. 배발생 캘러스는 hygromycin 저항성 선발마커를 포함한 pCAMBIA1300 벡터를 이용하여 Agrobacterium strain AGL1으로 공동배양하였다. 공동배양 후 50mg/L hygromycin에 저항성을 보이는 형질전환체가 선발되었다. $T_0$ 세대 형질전환벼로부터 genomic DNA를 추출하여 PCR과 Southern blot을 통한 외래 유전자의 안정한 삽입을 검정하였다. 형질전환된 벼라인에서 650bp의 HPT 유전자 단편이 나타났다. 그리고 argE의 특이적 priomer를 이용하여 검정한 결과 230bp 단편이 검출되었다. SEM을 이용하여 형태학적 분석을 한 결과 기공 분포와 배열상의 특징에 있어서 형질전환체는 대조구와 비교하여 기공형태가 불규칙적인 차이를 보여 주었다.