• 전자공학회논문지D
• /
• 제34D권10호
• /
• pp.68-76
• /
• 1997

In this paper, design parameters of rapid thermal processing(RTP) to minimize the wafer temperature uniformity errors are proposed. Lamp ring positions and the wafer height are important parameters for wafer temperature uniformity in RTP. We propose the method to seek lamp ring positions and the wafer gheight for optimal temperature uniformity. The proposed method is applied to seek optimal lamp ring positions and the wafer feight of 8 inch wafer. To seek the optimal lamp ring positions and the wafer height, we vary lamp ring positions and the wafer height and then formulate the wafer temperature uniformity problem to the linear programming problem. Finally, it is shown that the wafer temperature uniformity in RTP designed by optimal problem. Finally, it is hsown that the wafer temperature uniformity is RTP designed by optimal parameters is improved to comparing with RTP designed by the other method.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1994년도 추계학술대회 논문집 학회본부
• /
• pp.83-85
• /
• 1994

This paper describes the dual mode control of the LDM(Linear DC motor) for carrier. The dual mode control consists of seek and analogue control. In seek mode, LDM is moved in the shortest time by switching line, and in analogue mode keeps at origion with high accuracy. We proposed different switching line method according to driving direction.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1995년도 하계학술대회 논문집 A
• /
• pp.74-76
• /
• 1995

This paper describes the precise position control of the linear DC motor for carrier. We analyze the switching line of seek mode control and propose the modified switching line according to the mass and distance. Experimental results demonstrate that good performance is achieved by the proposed controller.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2001년도 추계학술대회논문집 II
• /
• pp.977-982
• /
• 2001

In this paper, we deal with the analysis and optimum design of a disc drive feeding system. Using this proposed design method, we can determine an optimal step motor and lead-screw for the shorter seek time and required seek resolution. Simulation results show that this method can be potentially implemented in the design of a feeding system.

• 인터넷정보학회논문지
• /
• 제16권4호
• /
• pp.93-99
• /
• 2015

The purpose of this study was to explore the reasons why college students use Facebook and the ways in which they feel of social presence while using Facebook. In fact, the study aimed to specify the links between motivations for using SNS and a sense of 'being together'. The findings of this study suggest that major motivations of SNS use were social interaction, entertainment, self-presentation, and information-seeking. Specifically, results from a survey of 280 respondents revealed that college students used Facebook to seek maintenance and connection with friends, to express themselves, to get information about school activities, and to be entertained. These findings are consistent with the existing literature regarding SNS as a primary channel to maintain the existing social relationships among college students. The study also found that all motivation factors, except information-seeking factor, were positively and significantly related to social presence. The strongest correlations were between social presence and Facebook use for social interaction and entertainment needs. It seemed that users who seek social interaction and entertainment needs are more likely to feel a sense of being with others while users who seek to get information are less likely to feel a sense of social presence. These findings implied that to some extent, a sense of social presence occurs in the context of Facebook and that the experience of social presence depends on what college students seek from Facebook use. In addition, the results showed a positive relationship between Facebook use and social presence; the more college students use Facebook, the more they are likely to experience sense of social presence. Given that Facebook provides college students with a place where they can share thought and feelings among friends, it can be concluded that Facebook contributes to the sense of belonging among users. And such feeling may enhance a sense of presence with others while using Facebook. These findings suggest that uses and gratifications researchers should consider the concept of social presence as an important variable in explaining what audience members do with media.

• 가정과삶의질연구
• /
• 제10권1호통권19호
• /
• pp.27-42
• /
• 1992

This study focused on consumer information search activity and consumer's post-purchase satisfaction. For these purpose, a survey was conducted suing questionaires on 430 homemakers that lived in seoul. Statistics used for data were Frequency Distribution. Percentile, Mean, One-way AAANOVA., Scheffe-test, T-test, Pearson's correlation. Multiple Regression Analysis and Multiple Classification Analysis. The major findings were ; 1) The level of each amount information search was lower than average. And the level of consumer's post-purchase satisfaction was a little higher than average. 2) On amount of "noncommercial-personal" information search, the influencing variables were desire to seek information, education, brand royalty in turn. These three variables explained 7% of dependent variable's variance. 3) On amount of "noncommercial-media" information search, the influencing variables were desire to seek information, amount of internal information, education, occupational status in turn. These variables explained 14% of dependent variable's variance. 4) On amount of "commercial-personal" information search, the influencing variable was desire to seek information, and this variable explained 3.1% of dependent variable'a variance. 5) On amount of "commercial-media" information search, the influencing variables were desire to seek information, education, amount of internal information in turn. These three variables explained 12.1% dependent variable's variance. 6) Resulting from multiple classification analysis, influencing variables on consumer's post-purchase satisfaction were amount of noncommercial-media information search and printed media search, and brand royalty. These three variables explained 9% of dependent variable's variance. Furthermore, througout all the subareas of consumer's satisfaction, the amount of noncommercial-media information search was the most influencing variable.

• 보건행정학회지
• /
• 제28권2호
• /
• pp.119-127
• /
• 2018

Background: This study aimed to examine (1) the patterns of online health information search with respect to seeking and scanning, and (2) how online search, along with eHealth literacy, predicts perceived information usefulness in the context of diet and weight control. Methods: Online survey was conducted with 299 adults from the consumer panel recruited for the purpose of quality assessment of the Korean National Health Information Portal in 2016. We conducted paired sample t-test and multiple logistic regression to address the research questions. Data analysis was performed using IBM SPSS Statistics ver. 24.0 (IBM Corp., Armonk, NY, USA) and SAS ver. 9.3 (SAS Institute Inc., Cary, NC, USA). Results: Of the respondents, 38.8% were 'high seek-high scanners,' 35.8% were 'low seek-low scanners,' 13.0% were 'high seek-low scanners,' and 12.4% were 'low seek-high scanners.' eHealth literacy was a significant, positive predictor of online information scanning (odds ratio [OR], 2.46; 95% confidence interval [CI], 1.41-4.29), but not for online information seeking (OR, 1.75; 95% CI, 1.00-3.05). With respect to perceived usefulness of online information seeking, online seeking (OR, 4.90; 95% CI, 2.19-11.00) and eHealth literacy (OR, 2.30; 95% CI, 1.11-4.75) were significant predictors. Perceived usefulness of online scanning had a significant association with online scanning (OR, 2.38; 95% CI, 1.08-5.22), but not with eHealth literacy. Conclusion: To increase the effectiveness of the health policy for online information search and related outcomes in the context of diet and weight control, it is important to develop education programs promoting eHealth literacy.

• 한국정보과학회논문지:정보통신
• /
• 제31권3호
• /
• pp.314-326
• /
• 2004

블루투스는 휴대폰을 비롯한 디지털 디바이스간의 탄력적이고 확장성 있는 무선 ad-hoc 네트워크를 제공할 수 있는 기술로 가능성을 인정받아왔다. 이러한 네트워크가 지원되기 위해서는 블루투스 스캐터넷(Scatternet)은 필수적인 요소이다. 그러므로 블루투스 스캐터넷과 관련되어서 현재까지 다양한 방법론이 제시되고 있다. 하지만 기존의 연구들은 시뮬레이션을 통한 방법론을 제시하는데 그치는 경우가 대부분이며, 스캐터넷의 탄력성과 확장성을 확보하지 못하고 그 복잡성으로 인해 하드웨어 구현에 제약이 있는 경우들이 많다. 본 논문에서는 실제 하드웨어 구현이 용이하고, 스캐터넷의 탄력성과 확장성을 확보할 수 있는 노드 링 스캐터넷(Node Ring Scatternet:NRS) 알고리즘을 제안하였다. 이 알고리즘은 초기 형성과 재형성 부분으로 구성이 되어 있다. 초기 형성과 관련되어 제한적 SEEK/SCAN 알고리즘을 제안하였고, 재형성과 관련되어서는 DIAC 알고리즘과 예약 복구 노드(Reserved Recovery Node) 알고리즘을 제안하였다. 또 실제 시스템 상에서 스캐터넷 알고리즘을 운용하기 위한 SFMP(Scatternet Formation & Management Protocol)을 설계하고, 상용 블루투스 하드웨어로 구현을 하여 20개의 디바이스까지의 스캐터넷 실험을 수행하였다. 실험 결과 기존의 유사 알고리즘에 비해 스캐터넷 형성 시간과 그 확률이 높은 결과를 얻었다.

• 한국소음진동공학회논문집
• /
• 제15권11호
• /
• pp.1276-1286
• /
• 2005

In this paper, the dual stage interaction between the coarse actuator and the fine actuator of an optical disk drive is studied, and the new control method to enhance the track pull-in performance using fine actuator control is proposed. First, the dynamic analysis for the dual stage and the experiments to find the each actuator dynamics are performed. From the experiments, some physical parameters of the actuators were derived, then, some simulations are performed to find the interaction effect of the fine actuator during seek motion. Second, the center servo which suppresses the vibration of fine actuator during seek motion is designed and evaluated. And the fine actuator control to reduce the relative velocity between the target track and beam spot is proposed. From simulations, we show that fine actuator control which has same frequency and same phase of the disturbance is effective to reduce the relative velocity, and this result leads to track pull-in enhancement. Hence, the proposed control method is good approach to improve the track pull-in performance. Finally, the realization of the proposed method and some comments of it are briefly discussed.

• International Journal of Costume and Fashion
• /
• 제16권1호
• /
• pp.17-35
• /
• 2016

The purpose of this study is to investigate the benefits sought by luxury good customers contingent on product category, and to understand the relationship between the benefits sought and brand loyalty. A qualitative approach was used; therefore in-depth interviews were conducted with seven panels of professionals in the luxury industry. The findings are as follows: 1) Handbag customers mainly seek the social benefits in order to express their social status by purchasing well-known, easily-recognizable brands. 2) Shoe customers primarily seek the practical-functional benefits, which are comfort and function. 3) Small Leather Goods customers seek the social benefits for themselves and as gifts for others. 4) Brand loyalty for handbag customers is reported to be low, as their primary goals are the social benefits. Rather than devoting themselves to one specific brand, handbag customers prefer to purchase from various brands. 5) Shoe customers have reportedly higher brand loyalty, as they tend to come back to brands when they are satisfied with the benefits they pursue. The findings of this study provide more information on the practical implications of luxury good customer purchasing habits. Firstly, customers pursue different benefits depending on product category, and secondly, brand loyalty differs by customers' benefits.