• Journal of information and communication convergence engineering
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• 제13권1호
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• pp.56-61
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• 2015

The demand for high-aspect-ratio structures has been increasing in the field of semiconductors and other applications. Here, we present the commercially available negative-tone SU-8 as a potential resist that can be used for direct patterning of high-aspect-ratio structures at the submicron scale and the nanoscale. Such resist patterns can be used as polymeric molds to create high-aspect-ratio metallic submicron and nanoscale structures by using electroplating. Compared with poly (methyl methacrylate) (PMMA), we found that the negative tone resist required an exposure dose that was less than that of PMMA of equal thickness by a factor of 100-150. Patterning of up to 4:1 aspect ratio SU-8 structures with a minimum feature size of 500 nm was demonstrated. In addition, nanoimprint lithography was studied to further extend the aspect ratio to realize a minimum feature size of less than 10 nm with an extremely high aspect ratio in the negative resist.

• 대한인간공학회지
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• 제33권6호
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• pp.499-513
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• 2014

Objective: The objective of this study was to examine frame ratio of text information and font size in the circle smartwatch. Background: Recently, electronic manufacturers try to develop the original metaphor of traditional wrist watch (circle) in terms of smartwatch. They endeavor to break the square display in order to improve emotional customer satisfaction. Method: The experiments examined twenty level of text information design, combinations of four frame ratios (1:1, 4:3, 16:9, 21:9) and five font sizes (6pt, 7pt, 8pt, 9pt, 10pt). Nineteen participants volunteered for the experiment. Dependent variables were WPM (Words per Minute), reading preference, design preference and total preference. Furthermore, small circle display was made by using circle display data (1.3inch), which was exhibited in IFA (International Funkausstellung) 2014. Results: As a result, ANOVA (Analysis of Variance) revealed that WPM, and task time preference affect the specific frame ratio and font size. Results of ANOVA for reading preference, design preference, total preference were grouped by post-analysis LSD (Least Significant Difference). Among users, display ratio (16:9, 21:9), and font size (9pt) were preferred. In conclusion, 16:9 display ratio and 9pt are adaptable for text information in 1.3inch circle display. Conclusion: From the study, it is shown that 16:9 display ratio and 9pt size are more adaptable for text information in 1.3inch circle display than others. It is mainly due to the fact that the order of frame ratio and font size may affect the usability of reading long text information in a small circle display. Therefore, when developers design a circle display, the square frame ratio and font size are required to be considered according to circle size. Application: The 16:9 display ratio and 9pt font size may be utilized as a text information frame in the circle display design guideline for smartwatch.

• 통상정보연구
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• 제11권1호
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• pp.157-176
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• 2009

This study analyzed the information factors which determine cash liquidity in Korean export-oriented companies. In this paper, cash liquidity means the ratio of the value of cash or cash equivalent to the asset value subtracted marketable securities value from total asset value. The empirical test shows that main information factors are the size of company, the growth opportunity of company, the volatility of operating cash flows and free cash flows, the credit yield spread of company, the debt ratio, the turnover ratio of cash flows and free cash flows, and the estimate of bankruptcy that amounts to the inverse number of Z score. In summary, the size of company, debt ratio, turnover ratio of cash flows and free cash flows, and Z-score have negative influence on the cash liquidity of Korean export-oriented companies. but the volatility of operating cash flows affect the cash liquidity positively.

• 한국멀티미디어학회논문지
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• 제16권9호
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• pp.1067-1076
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• 2013

Known as an important criterion that evaluates performance of future high-speed backbone networks, burst data loss ratio is well-studied in Optical Burst Switching networks. Current literatures mostly focus on reduce burst loss ratio without considering the system stability and link utilization after reducing. In this paper, we propose a novel framework which comes from feedback theoretic to dynamically control burst loss ratio in OBS. The proposed scheme tries to track the pre-set values of burst loss ratio and increases the stability and link utilization degree. The simulation results show that measured burst loss ratio always tracks setup reference with small errors, wavelength channel utilization is increased up to 2% and the system stability is also improved.

• Journal of the Korean Data and Information Science Society
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• 제17권3호
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• pp.963-972
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• 2006

This paper focuses on the likelihood based confidence intervals for two inverse gaussian distributions when the parameter of interest is common scale parameter. Confidence intervals based on signed loglikelihood ratio statistic and modified signed loglikelihood ratio statistics will be compared in small sample through an illustrative simulation study.

• 대한산업공학회지
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• 제35권2호
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• pp.141-149
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• 2009

As the number of personal computers installed in vehicles increases, a touchpad often used in a labtop computer can be used for the control of an in-vehicle information system (IVIS). Using a touchpad to control the system allows the user to select among large amount of information with a single touch of dragging. For safety and convenience of a driver, the touchpad could be placed on a steering wheel. This research is designed to calculate the most efficient Control-Response Ratio (C/R ratio) for the menu interaction of a touchpad on a steering wheel. Since the menu pointer's rate of movement and proper C/R ratio is determined by the amount of selected information, the amount of displayed information and the movement of a menu pointer was chosen to be independent variables. The dependent variables are a user's preference and task completion time. Two factor full factorial within subject design was used 16 subjects. The investigation revealed that the amount of selected information increased with increasing C/R ratio. The movement of the pointer became slower as the amount of information increased. The best C/R ratio was calculated for each amount of information and preference regression of the user's preference was drawn accordingly. Through this research, the automobile interior designer can benefit from the guidelines suggested for the touchpad control.

• Journal of the Korean Data and Information Science Society
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• 제17권2호
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• pp.515-520
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• 2006

We shall consider an estimation of the reliability P(Y

• 디지털융복합연구
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• 제14권10호
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• pp.107-117
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• 2016

본 연구는 유가증권시장의 제조업을 대상으로 재무정보의 효율성이 기업가치에 미치는 영향에 대해 정보가 반영되는 시기를 중심으로 검증하고자 하였다. 이를 위해 재무제표 공시를 기준으로 분석기간을 당해(t)년도, 재무제표 공시 전 90일, 차기년도(t+1)로 구분하였다. 실증분석에 사용된 재무변수는 수익성, 성장성, 안정성, 활동성 및 시장가치 비율이며 재무정보가 분석기간 동안의 주식수익률에 미치는 영향을 단계적 회귀분석(stepwise regression)을 이용해 검증하였다. 실증분석 결과, 성장성과 수익성에 관한 정보는 당기의 주식수익률에 반영되는데 비해 안정성과 활동성에 관한 정보는 차기의 주식수익률에 정보를 반영하고 있는 것으로 나타났다. 총자산증가율은 당기 및 차기의 주식수익률에 부(-)의 유의적인 영향을 주는 것으로 나타났으며, 이는 재무정보가 산출된 동기간에 정보가 반영될 뿐만 아니라 차기에도 지속적으로 정보를 반영하는 것으로 판단된다. 본 연구는 재무정보의 성격에 따라 기업가치에 반영되는 시기가 달라지는 것을 발견하였다.

• 한국컴퓨터정보학회논문지
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• 제4권3호
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• pp.114-120
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• 1999

본 논문은 IMF 관리체제하에서의 우리 나라 기업의 재무비율에 대한 실태를 조사 분석하였다. 우선 IMF 관리체제 이전과 이후의 우리 나라 기업의 재무비율에 대한 변동실태를 비교 분석하였고 또한 이를 표준비율과 비교함으로써 기업의 경영성과와 재무상태에 대한 적부를 검토하고 이에 대한 문제점과 개선 방안을 제시하였다. 재무 비율 분석의 내용으로는 안정성비율, 수익성비율. 활동성비율, 성장성비율, 생산성비율 등을 중심으로 분석하였다.

• Journal of the Korean Data and Information Science Society
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• 제17권4호
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• pp.1091-1098
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• 2006

Park et al.(2005) and Choi et al.(2006) studied quick detection of variance change point for time series data in progress. For efficient detection they used moving variance ratio equipped with two tuning parameters; information tuning parameter p and lag tuning parameter q. In this paper, the moving variance ratio is studied under harsh conditions.