• 무역상무연구
• /
• 제23권
• /
• pp.3-38
• /
• 2004

On-line game business has emerged as the most lucrative entertainment industry, with over 4 million players in China, with more than 45% of the market dominated by Korean on-line games. While the interactive entertainment market continues to expand, with many new Korean on-line game publishers entering the market, relatively little is known about which factors influence online game players' behavioral intentions (i.e., intention to play, brand-identity, word of mouth, flow, etc.) in this area. It appears that in this extremely attractive and growing services segment, academics, as well as practitioners, would benefit from investigating the relationships among the players' intention to play, social norms, word of mouth, flow, and the impacts of several other key game-related constructs. A conceptual framework is proposed and a simultaneous equation model is developed. This paper develops the exploratory LISREL model for identifying the factors affecting the players' intention to play for on-line games. Based on data collected from on-line questionnaire survey in China, the validity of the model has been tested and interesting conclusions have been developed concerning the relationships between the game-related constructs. It is hoped that this result might provide the useful guidelines for developing the successful on-line game contents. With better understanding of the players' behavioral intentions, Korean on-line game developers should be able to penetrate the China market with sustainable advantage over their competition.

• 청정기술
• /
• 제17권3호
• /
• pp.215-224
• /
• 2011

화석연료 사용에 따른 기후 변화 문제 및 자원 고갈에 대한 염려 때문에 바이오 연료는 그 중에서 가장 바람직한 재생에너지 대안이다. 하지만 대량 생산을 할 수 있는 경제성확보가 없으면 바람직하고 현실적인 대안이라 할 수 없다. 실시간 품질측정 시스템 개발은 바이오연료의 대량생산을 위하여 반드시 필요하다. 바이오 연료 중 바이오에탄올은 ASTM (American Society for Testing & Materials) D4806-10과 같은 품질 규격을 따르며 이에 명시된 평가방법을 대량 생산에 적용하려면 여러 어려움이 뒤따른다. 따라서 본 연구에서는 바이오에탄올 제품 품질 분석의 저가격화와 시간단축 및 생산 공정의 모니터링 실시간화를 해결하기 위해 근적외선 분광분석법과 화학계량학의 부분최소 자승법(Partial Least Squares)을 융합한 실시간 분광 모니터링 시스템을 새롭게 제안하였다. 수종의 전처리와 부분최소자승법을 이용하여 모델링한 결과 스펙트럼의 산란 보정, 노이즈 감소, 검량선의 유지보수 등에서 Savitzky-Golay 전처리가 가장 우수함을 보였다. 본 연구를 통해 실시간으로 품질 측정뿐만 아니라 분광분석 장치로 여러 성분을 동시에 측정 가능함을 보임으로서 비용의 절감도 가능할 것으로 예상된다. 그리고 상관계수 R2이 0.99 이상으로 실험실분석의 대체도 가능함을 보였다.

• 대한소아치과학회지
• /
• 제11권1호
• /
• pp.159-167
• /
• 1984

In this experiments, the fracture loads were measured and analysed by using of Instron universal testing machine (Model 1132). With 80 upper and lower deciduous molars that were free of dental caries. Isthmus of teeth were prepared to 1/3 and 1/4 of intercuspal width, and internal line angles with round and sharp shape, and then amalgam restoration were performed. The results of this study were as follows; 1. Resistance to fracture loads were greater with isthmus of 1/3 intercuspal width than of 1/4 intercuspal width, especially, statistically significant difference on upper and lower second deciduous molars. 2. Resistance to fracture loads were greater with rounded internal line angle than sharp internal line angle. The above results were as follows, the fracture loads had greater resistance on isthmus of 1/3 intercuspal width, and rounded internal line angle, but normal physiological occlusal forces could permit isthmus of 1/4 intercuspal width and rounded internal line angle.

• 품질경영학회지
• /
• 제20권2호
• /
• pp.11-20
• /
• 1992

We discuss the feed back control of the on-line QC in the Taguchi method. Taguchi(1982) used the assumptions that the quality characteristics follow an uniform distribution and the Brownian motion to draw the loss function and proposed ${\Delta}/3$ or ${\Delta}$ for the initial control limit. Adams and Woodall(1989) also proposed a different procedure but using the same loss function. We propose, in this paper the new loss function under the assumption of mainly Brownian motion and compare the results with the results of the above.

• 디지털콘텐츠학회 논문지
• /
• 제6권3호
• /
• pp.185-188
• /
• 2005

In this paper, we propose a device to track the location of illegal reproduction and monitor illegal reproduction by testing with digital watermark in order to protect copyright of digital contents and prevent massive distribution through illegal reproduction.

• Journal of Information Processing Systems
• /
• 제8권1호
• /
• pp.21-54
• /
• 2012

As we know every software development process is pretty large and consists of different modules. This raises the idea of prioritizing different software modules so that important modules can be tested by preference. In the software testing process, it is not possible to test each and every module regressively, which is due to time and cost constraints. To deal with these constraints, this paper proposes an approach that is based on the fuzzy multi-criteria approach for prioritizing several software modules and calculates optimal time and cost for software testing by using fuzzy logic and the fault tolerance approach.

• Smart Structures and Systems
• /
• 제17권1호
• /
• pp.1-15
• /
• 2016

Rayleigh wave velocity along a straight survey line on a concrete plate is measured in order to compare different non-destructive data acquisition techniques. Results from a rolling non-contact data acquisition system using air-coupled microphones are compared to conventional stationary accelerometer results. The results show a good match between the two acquisition techniques. Rolling measurements were found to provide a fast and reliable alternative to stationary system for stiffness determination. However, the non-contact approach is shown to be sensitive to unevenness of the measured surface. Measures to overcome this disadvantage are discussed and demonstrated using both forward and reverse rolling measurements.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
• /
• pp.219-223
• /
• 2001

This paper proposed the Automatic defect testing technology which used in the defect test of printed things and external shapes in the precision industry. According to adapting the very high speed image processor called ASIC for high resolution. This system also realized that the System being able to perform the very high speed resolution testing. As the image processing algorithm, Run-length coding, Multi-level threshold and fast-adaptive line matching were applied.

• 대한기계학회논문집A
• /
• 제30권10호
• /
• pp.1219-1226
• /
• 2006

The ASTM test standard recommends the use of the compact tension specimen for creep crack growth rates measurement. In the creep crack growth rate test, the displacement rate due to creep is obtained by subtracting the contribution of elastic and plastic components from the total load line displacement rate based on displacement partitioning method fur determining $C^*-integral$, which involves Ramberg-Osgood (R-O) fitting procedures. This paper investigates the effect of the R-O fitting procedures on plastic displacement rate estimates in creep crack growth testing, via detailed two-dimensional and three-dimensional finite element analyses of the standard compact tension specimen. Four different R-O fitting procedures are considered; (i) fitting the entire true stress-strain data up to the ultimate tensile strength, (ii) fitting the true stress-strain data from 0.1% strain to 0.8 of the true ultimate strain, (iii) fitting the true stress-strain data only up to 5% strain, and (iv) fitting the engineering stress-strain data. It is found that the last two procedures provide reasonably accurate plastic displacement rates and thus should be recommended in creep crack growth testing. Moreover, several advantages of fitting the engineering stress-strain data over fitting the true stress-strain data only up to 5% strain are discussed.

• 대한기계학회논문집A
• /
• 제30권3호
• /
• pp.269-278
• /
• 2006

This paper proposes slip line fields for bending of unequally notched specimens in plane strain that have a sharp crack in one side and a sharp V-notch in the other side. Depending on the back angle, two slip line fields are proposed, from which the limit moment and crack tip stress fields are obtained as a function of the back angle. Excellent agreement between slip line field solutions with those from detailed finite element limit analysis based on non-hardening plasticity provides confidence in the proposed slip line fields. One interesting point is that, for the unequally notched specimen, the difference between the crack tip triaxial stress for tension and that for bending increases significantly with increasing the back angle. This suggests that such a specimen could be potentially useful to investigate the crack tip constraint effect on fracture toughness of materials. In this respect, the possibility of designing a new toughness testing specimen with varying crack tip constraint is discussed.