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- 저자 : Sooyeon.Lee (검색결과 407 건)
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The Effect of Surround Condition and Transmission on Color perception of Transparent display
Sooyeon Lee,Hyeyoung Ha,Semin Oh,Jungmin Im,Youngshin Kwak 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11
Objective: In this study the effect of the level of luminance and transmission on display color perception would be analyzed. Background: Various types of display such as flexible, transparent and stretchable display are developed as the display panel technique grows. Displayed images on transparent display are more significantly affected by surround condition compared to other types of display. Hence the factors to be considered such as surround condition, haze, transmission are more than others. However the studies for these factors are still in its infancy. Method: It is impossible to conduct this study with various levels of transmission and surround condition by commercial transparent display. Therefore the transparent display was simulated on LCD display. The display was set for sRGB gamut and level of transmission and surround luminance is controlled. Level of surround luminance was 0 to 3 times of peak white for display with 0.5 interval and the transmission were 0, 10, 30, 50 and 70%. 35 combination of transmission and surround luminance was applied to simulated transparent display and the change of display color by each condition was tested. Results: As the result, color gamut is decreased as surround luminance or transmission is increasing. Moreover this increment gives rise to poor image quality as contrast is decreasing. Conclusion: image processing algorithm considering surround condition need to be applied to transparent display. Application: The result of simulation might help to suggest the image quality algorithm.
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Lee, Sooyeon,Lee, Kyung Min,Kim, Ketack The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.2
Trimethylammonium tetrafluoroborate (TriMA BF<sub>4</sub>), consisting of the smallest trialkylammonium ion, was investigated for use in electrochemical double-layer capacitors. Despite the presence of a proton in TriMA<sup>+</sup>, cycle life tests in acetonitrile (AN) and -butyrolactone (GBL) showed a good capacity retention with a 1.8 V cut-off voltage. The rate of electrolysis of TriMA BF<sub>4</sub> in GBL was lower than that in AN because of the lower conductivity in GBL. As a consequence, the cells based on GBL achieved a higher capacitance and longer life than those with AN. TriMA BF<sub>4</sub> had a higher conductivity and lower viscosity than the quaternary salt tetraethylammonium tetrafluoroborate in GBL, as well as higher ionic mobility, these factors resulted in a higher rate capability.
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Sooyeon Lee,Jiyoung Yoon 한국조리학회 2024 한국조리학회지 Vol.30 No.2
The purpose of this study is to enhance the quality of franchised restaurant service by reducing potential service failure based on the risk priority of service failure. Failure mode and effect analysis (FMEA) was adopted to either address service failure or to improve the overall service quality in franchised restaurants. In addition, the study bolsters the analysis with fuzzy inference, a solid mathematical inference system when it comes to utilizing experts evaluation, thus reducing the linguistic ambiguity inherent in experts risk assessment and eliciting the objective risk value of each service failure mode. 70 respondents who have at least two years work experience as a manager in a franchised restaurant were only eligible to participate in the research. Fuzzy Logic Toolbox on MATLAB was used for fuzzy inference and determination of the risk priority. The results provided the risk priority of each service failure mode. The highest risk of service failure modes were ‘foreign substance contaminants in served food (7.40)’, ‘unfriendly employees (7.32)’, and ‘unclean tableware (7.17)’, with fuzzy value of more than 7. In contrast, ‘restaurant interior that does not match brand image (3.47)’, ‘lack of variety in the menu (3.72)’, ‘absence of background music (3.93)’, ‘absence of wait guidance (3.97)’ were classified as the lowest risk among the failure modes. The study expects several theoretical and practical contributions by applying the mathematical cognitive model in service failure analysis and suggesting a solution to prevent service failures.
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Sooyeon Lee,Miah Lee,Eunju Ko,Sangwon Lee 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.6
According to the development of information technology (IT) and new media, customers’ needs have changed to seek not only high quality goods but also a differentiated service in retail stores (Lee & Shin, 2011). For this reason, fashion retail stores started to provide an interesting service by setting up an IT machine or a gadget in the stores. Thereby, customers can get the information or have a special experience while they shop fashion goods. IT shopping service is defined as using technology in retail stores to enhance interaction between retailers and customers. Retailers have tried several types of IT shopping services, which offer information or experience with a high or low level of technology. Informative IT shopping service provides various and useful information, which is related to each product such as size, color, contents, stock, location and fashion styling. Retailers use experiential IT shopping service as an emotional appeal that gives direct experience to customers in some way or other such as watching or acting in a virtual situation. Also, as technology develops, IT shopping services are embodied with diverse technology that are simple or complexity. Some are easy to use with one button and shows 2D images only, but some have a lot of contents such as video clips, SNS share service, showing 3D images, and implementing augment reality. We saw customer responses on the attributes of IT shopping service (informative vs. experimental) x technology level of IT shopping service (high vs. low) x fashion innovativeness/technology innovativeness (high vs. low) This study aims to see the effect of the attributes of IT shopping service and the level of technology on procedure satisfaction and outcome satisfaction, and the moderating effect of perceived enjoyment and perceived complexity. Furthermore, this study will see whether these effects affect visit intention. In this study, the experimental design was adopted as the main methodology, and a total of four stimuli types were selected: 1) informative x high technology 2) informative x low technology 3) experiential x high technology 4) experiential x low technology. The common element, which all types of stimuli have, is a digital touch screen since it is a general equipment nowadays, and the common fashion good for all types is a black blazer. The type of informative service only has the information (size range, color assortment, contents, stock) about selected fashion good with its image. High technology in informative service shows the image with 3D simulation that can help to see 360º of the blazer, and styling tips including a video clip. Moreover, it helps to share the information with friends via SNS. Low technology in informative service only shows a front side of the blazer and presents a store map for customers to find a product they want to try. The types of experiential service draw customer participation providing a picture of customers that are trying on clothes. Experiential service use augment reality (AR) as a high technology and take the back side of customers picture as low technology. For the manipulation check, 18 graduate students in total viewed for each type, and the total sample comprises 387 college students via survey instrument. All hypotheses were tested using AMOS and SPSS 18.0. The main findings of this study are as follows: depending on type of the attributes of IT shopping service and the level of technology affect perceived enjoyment and perceived complexity differently, and there were significant mediating effect of perceived variables toward IT shopping service on procedure satisfaction, outcome satisfaction, and visit intention. Implications for usefulness and role of the IT shopping service in fashion retail stores are provided. And also, limitation of this study and future study are suggested.
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Sooyeon Lee,Kyung Seek Choi 대한안과학회 2023 Korean Journal of Ophthalmology Vol.37 No.4
Purpose: To compare and analyze the performance of dual pneumatic ultra-high-speed vitreous cutters based on their cut rates, vacuum levels, and diameters in terms of flow rate and cutting time. Methods: The Constellation Vision System was used to remove egg white for 30 seconds, after which we calculated the flow rate by measuring the change in weight. We then measured the time required to remove 4 mL of egg white. We tested the UltraVit (UV) 7,500 cuts per minute (cpm) probe and the Advanced UltraVit (AUV) 10,000 cpm probe in biased open duty cycle mode, using 23-, 25-, and 27-gauge probes, respectively. Results: In biased open duty cycle, the flow rate tended to decrease as the cut rates increased for all three gauges. At the same cut rates, the flow rate increased as the vacuum level increased (p < 0.05), and as the diameter increased (p < 0.05). Among cutters with the same diameter, the AUV cutter showed higher flow rates than the UV cutter, with increases of 0.267 mL/ min (18.5%) at 27 gauge, 0.627 mL/min (20.8%) at 25 gauge, and 1.000 mL/min (20.7%) at 23 gauge (all p < 0.05). The times required to remove 4 mL of egg white took longer with the UV cutter than the AUV cutter for all three gauges (all p < 0.05). Conclusions: The use of a smaller gauge vitreous cutter may reduce the flow rate and increase the time required for vitrectomy, but this can be partially compensated for by increasing the vacuum level as well as using a vitreous cutter with a higher maximum cut rate, improved port size, and improved duty cycle.
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Mitophagy : Therapeutic Potentials for Liver Disease and Beyond
Sooyeon Lee,Jae-Sung Kim 한국독성학회 2014 Toxicological Research Vol.30 No.4
Mitochondrial integrity is critical for maintaining proper cellular functions. A key aspect of regulating mitochondrial homeostasis is removing damaged mitochondria through autophagy, a process called mitophagy. Autophagy dysfunction in various disease states can inactivate mitophagy and cause cell death, and defects in mitophagy are becoming increasingly recognized in a wide range of diseases from liver injuries to neurodegenerative diseases. Here we highlight our current knowledge on the mechanisms of mitophagy, and discuss how alterations in mitophagy contribute to disease pathogenesis. We also discuss mitochondrial dynamics and potential interactions between mitochondrial fusion, fission and mitophagy.
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