• Title/Summary/Keyword: Visual comfort

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The Effects of Spherical and Aspherical RGP Contact Lenses on Visual Performance (구면 및 비구면 RGP 콘텍트렌즈가 시력의 질에 미치는 영향)

  • Kim, Soo-Hyun;Kim, Hyun Jung;Kim, Jai-Min
    • Journal of Korean Ophthalmic Optics Society
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    • v.14 no.1
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    • pp.31-38
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    • 2009
  • Purpose: This study was to evaluate corneal topography, contrast sensitivity and ocular response of a RGP, back surface aspherical contact lens compared with a spherical contact lens. Methods: A total 37 subjects were fitted with a spherical lens in right eye and an aspherical in the left eye and were evaluated for changes in corneal topography and contrast sensitivity over a 2-month period. Results: Thirty-four of 37 subjects completed the 2-month study. The corneal topography did not show differences between spherical and aspherical RGP lenses. The eyes fitted with the aspherical lenses demonstrated a greater reduction in contrast sensitivity compared with their spherical counterparts under photopic condition. Subjects preferred comfort and ocular responses provided by the spherical lens. Conclusions: Corneal topography when comparing spherical and back surface aspherical RGP lenses did not show any significant difference in the subjects. Spherical RGP lens yields better contrast sensitivity and preference than aspherical RGP lens at photopic condition. Further investigation of aberrations induced by contact lens design is warranted to explain the observed differences in visual performance.

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Implementation of an Intelligent Audio Graphic Equalizer System (지능형 오디오 그래픽 이퀄라이저 시스템 구현)

  • Lee Kang-Kyu;Cho Youn-Ho;Park Kyu-Sik
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.43 no.3 s.309
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    • pp.76-83
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    • 2006
  • A main objective of audio equalizer is for user to tailor acoustic frequency response to increase sound comfort and example applications of audio equalizer includes large-scale audio system to portable audio such as mobile MP3 player. Up to now, all the audio equalizer requires manual setting to equalize frequency bands to create suitable sound quality for each genre of music. In this paper, we propose an intelligent audio graphic equalizer system that automatically classifies the music genre using music content analysis and then the music sound is boosted with the given frequency gains according to the classified musical genre when playback. In order to reproduce comfort sound, the musical genre is determined based on two-step hierarchical algorithm - coarse-level and fine-level classification. It can prevent annoying sound reproduction due to the sudden change of the equalizer gains at the beginning of the music playback. Each stage of the music classification experiments shows at least 80% of success with complete genre classification and equalizer operation within 2 sec. Simple S/W graphical user interface of 3-band automatic equalizer is implemented using visual C on personal computer.

Daylighting Performance of Office Space Applied with Electrochromic Façade System (전기변색 외피시스템 적용 업무공간의 채광 성능 분석)

  • Kim, Jae-Hyang;Han, Seung-Hoon
    • Land and Housing Review
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    • v.13 no.1
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    • pp.131-140
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    • 2022
  • A smart window is a new building material that can realize energy savings in a building. Smart windows can freely adjust Visible Light Transmittance (VLT) and solar gain coefficient (g-value) according to the situation. Smart windows include such technologies as Electrochromic (EC), Suspended Particle Device (SPD), and Polymer Dispersed Liquid Crystal (PDLC). Recent research on building energy savings through the VLT and g-value control functions of smart windows is being actively conducted and meaningful results are being drawn. However, since most of the research is focused on energy savings, research on the indoor environment is somewhat lacking. A building is a space where people live and the comfort of life should be prioritized before energy savings. Therefore, in this study, analysis on the daylight performance of an office space was carried out. Through green building standards such as LEED, BREEAM, CASBEE, and G-SEED, the daylight performance was reviewed according to VLT value changes of the smart window. In addition, a study was conducted on the VLT range of the electrochromic façade that can maintain a comfortable indoor environment. The smart window used electrochromic control with a wide range of VLT. The study showed that the minimum VLT of a smart window that can satisfy G-SEED is 25% or more. In addition, it was found that the VLT change of the electrochromic smart window did not significantly affect the uniformity of the room. When the LEED standard was applied, the minimum VLT value of the electrochromic smart window that must be maintained according to each orientation of the building was derived.

The Impact of Servicescapes of Global Coffee Franchise Store on Customer Satisfaction and Loyalty: The Case Study of 'C' Franchising Company in Mongolia (글로벌 커피 프랜차이즈 전문점의 서비스스케이프가 고객만족과 충성도에 미치는 영향 : 몽골의 'C' 기업의 사례 연구)

  • Samdan, Davaasuren;Han, Young-Wee;An, Dae-Sun
    • The Korean Journal of Franchise Management
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    • v.9 no.3
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    • pp.19-29
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    • 2018
  • Purpose - Due to the increase in coffee consumption and competition, domestic coffee franchise companies are currently entering the overseas market. Therefore, coffee franchise companies are pursuing a variety of marketing strategies to meet customer needs and gain competitive advantage in overseas markets. From this perspective, overseas franchise companies need to ensure that their servicescapes meet the needs of their overseas customers. For these purposes, the study is to identify the impact servicescapes on customer satisfaction and customer loyalty focused on Global Coffee Franchise Company "C", which extended its business worldwide in Mongolia. Research design, data, and methodology - The data were collected from customers who had visited the stores of 'C' company in Ulaanbaatar, Mongolia. 435 valid questionnaires collected through online survey coded and analyzed using frequency, confirmatory factor analysis, correlations analysis, and structural equation modeling with SPSS 24 and SmartPLS 3.0. Result - Firstly, seating comfort, facility aesthetics, and cleanliness, ambient conditions among servicescapes influenced customer satisfaction. Secondly, servicescapes didn't affect the loyalty directly. Third, customer satisfaction had positive effect on loyalty. Fourthly, cleanliness which was ranked lower in Korea had a great effect on customer satisfaction in Mongolia. Fifthly, IPMA(Importance-performance map analysis) shows that the importance of servicescapes is higher for women than for men, and facility aesthetics for female and cleanliness is the most important for male. Conclusions - The results of this study show that there is a positive (+) effect on customer satisfaction in order of cleanliness, ambient conditions, aesthetics, and seating comfort. Therefore, franchise companies considering or advancing into Mongolia should consider importance in order of cleanliness, ambient conditions and aesthetics when entering Mongolia market. For example, franchise managers should select Monday as a "clean day," and all merchants should spend all of their open hours and keep their stores clean in accordance with the head office manual. In addition, franchise managers need to hire a VMD (visual merchandising) experts to build up a physical environment that will effectively highlight the space-specific display of the store so that Mongolian local customers can have a satisfactory climate and aesthetics. And, the IMPA analysis between servicescapes and customer satisfaction shows that women are more susceptible to servicescapes than men. Especially, in the case of women, the importance of esthetics is high, but the performance is low. Thus, if the aesthetics are actively improved, customer satisfaction can be effectively increased.

A Study on the Expansion of Stage Costumes in the Contemporary Ballet Play <'That' Girl> (창작 발레극 <'그' 소녀> 에 나타난 무대의상의 확장성 연구)

  • Jinyoung Ryu;Sojung Chang
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.5
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    • pp.779-785
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    • 2023
  • In the creation of non-verbal dance performance, stage costumes are an important element of visual expression and serve an expanded role in addition to its fundamental decorativeness, representation of status reflective of the historical setting of the act and functionality for the dance movement. We intends that the purpose of this research is to analyze the expanded role of the costumes in the creative ballet <'That' Girl>, and through this exercise, provide foundational data on and suggest new future directions for stage costume design. <'That' Girl> is composed of two acts, offering condolences and eliciting empathy by conveying the fear experienced by the victims of the time. The second dance act representing freedom and "Haan" requires this expanded application of costume design. The costume design was inspired by the "Statue of Peace" representing comfort women, and completed through three draft designs and material experiments testing the ease of operation of the strings and fabrics installed in the costumes as well as the functionality of the associated ballet movements. In conclusion, expansion of time & space, expansion of form and expansion of symbolic expression were shown in the dance of liberation using strings wrapped around the arms and through the cloth embodying 'Haan' hidden in front of the costume.

A Study on the Effect of Chanel Style on Cosmetic and Beauty (샤넬스타일이 향장미용에 미친 영향에 관한 연구)

  • Seok, Eun-Kyung;Chae, Keum-Seok
    • Journal of the Korean Society of Clothing and Textiles
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    • v.33 no.4
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    • pp.611-621
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    • 2009
  • As fashion is a visual symbol that reflects age and culture, cosmetics and beauty are other products of fashion that move the time. A dominant designer of 20th century Chanel does not merely stand for a design innovation of fashion industry that created a vogue. With liberation from corsets that cruelly exaggerated and suppressed female body, meaning of style in modern fashion could be found not only in clothing but also in make-up and hair style. Simplest possible comfort was aimed for, and philosophical concepts of minimalism, modernism and dandyism were incorporated with clothing, cosmetics, perfume, make-up and hair style to establish aesthetical concept of total fashion. Chanel thought of cosmetics as an accessory with essential role and although her philosophy on cosmetics and beauty is not as well known as her clothing style, the authors believe that understanding such philosophy will become an important stepping stone for accurately understanding Chanel style. The purpose of this study is to firstly illuminate the idea that cosmetic beauty can be studied with artistic and philosophical background in addition to its functional side and to secondly investigate the reason why Chanel style is being loved by women with such durability over time and space and with what tempo fashion is connected with cosmetic beauty culture and develops. Third, by studying the ways in which characteristics of Chanel's fashion philosophy are expressed in cosmetics and beauty culture, this study aims to accurately understand Chanel's philosophy on cosmetics and beauty. The meaning of this study can be found by showing the evidence that globalization of Korean fashion beauty culture can be achieved only when cosmetics and beauty culture moves with an intimate connection to clothing culture.

A comparative analytical study of the industrial patterns of baggy pants - Focused on men in their early twenties - (배기팬츠의 산업패턴 비교·분석 연구 - 20대 초반 남성을 중심으로 -)

  • Kim, Min-Jung;Jang, Hyo-Cheon;Park, Sun-Kyung
    • The Research Journal of the Costume Culture
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    • v.21 no.3
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    • pp.431-439
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    • 2013
  • This study aims to give practical help to the pattern making of baggy pants produced in large quantity from industrial fields. The functionality of crotch part is a key element to decide wear sensation and comfort of pants as having direct influence on movements of legs in pattern designing of baggy pants. The industrial patterns of baggy pants in various styles that are released currently in Korea were collected and a comparative analysis was conducted on them for the thesis. First, samples of men baggy pants were collected from three different brands and compared the completion sizes. Secondly, it studied the most appropriate patterns as quantifying the appropriateness of movements through fitting tests. Finally, the study verified the differences of visual images by surveys of professional groups. The conclusions obtained from this research are as follows. In terms of aesthetic attribute among the three brands, A baggy pants, which had a small size tolerance, were the most appropriate. Meanwhile concerning the appropriateness of movement, B baggy pants were shown to be the most appropriate. This reveals explicitly the problem of aesthetic attribute and functionality, which are always in conflict during the pattern design. It is necessary to develop patterns and establish a measurement system that may satisfy both of these factors.

Acceleration of the Perception Threshold of Occupants for the Horizontal Vibration of Tall Buildings (고층 건축물의 수평진동에 대한 사용자의 지각임계가속도)

  • Cho, Kang-Pyo;Shin, Sung-Woo;Jeong, Seung-Hwan;Cho, Soo-Youn
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.20 no.3
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    • pp.371-377
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    • 2007
  • In this paper, acceleration threshold of perception for the horizontal vibration of tall buildings was estimated. Excessive vibration of tall buildings by wind can give displeasure, such as giddiness and visual insecurity. To provide comfortable environment to residents of tall buildings, acceleration needs to be limited. For tall buildings the first mode of vibration is dominant. To reproduce the first mode of vibration, experiments were performed by generating sine waves by a shaking table. A nitration house was made and forty persons were employed for experiments. The forty persons were organized into five experimental groups, each of which was composed of eight persons, and the threshold of perception for horizontal vibration was measured by increasing acceleration in the range of 0.2Hz through 1.2Hz of frequency, Performance curves were obtained by dividing the distribution of perception for horizontal vibration into the range of $0{\sim}20%,\;21{\sim}40%,\;41{\sim}60%,\;61{\sim}80%\;and\;81{\sim}100%$ and by fitting curves.

Hole-Filling Method for Depth-Image-Based Rendering for which Modified-Patch Matching is Used (개선된 패치 매칭을 이용한 깊이 영상 기반 렌더링의 홀 채움 방법)

  • Cho, Jea-Hyung;Song, Wonseok;Choi, Hyuk
    • Journal of KIISE
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    • v.44 no.2
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    • pp.186-194
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    • 2017
  • Depth-image-based rendering is a technique that can be applied in a variety of 3D-display systems. It generates the images that have been captured from virtual viewpoints by using a depth map. However, disoccluded hole-filling problems remain a challenging issue, as a newly exposed area appears in the virtual view. Image inpainting is a popular approach for the filling of the hole region. This paper presents a robust hole-filling method that reduces the error and generates a high quality-virtual view. First, the adaptive-patch size is decided using the color and depth information. Also, a partial filling method for which the patch similarity is used is proposed. These efforts reduce the error occurrence and the propagation. The experiment results show that the proposed method synthesizes the virtual view with a higher visual comfort compared with the existing methods.

Evaluation of Daylighting Performance in Office Building with Detailed Global Illuminance Data of Selected Korean Cities (정밀 전천공조도 데이터를 활용한 국내 주요도시 업무용 건물의 자연채광 활용성능 평가)

  • Choi, Su-Hyun;Shin, Sang-Yong;Seo, Dong-Hyun
    • Journal of the Korean Solar Energy Society
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    • v.36 no.6
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    • pp.37-46
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    • 2016
  • In this study, long-term global illuminance data for 19 selected cities are calculated from modeled solar radiation data, AEER's TMY2. Perez model in Daysim daylight simulation tool is used for the solar radiation to illuminance conversion. And then, daylight availability in an unit office space is evaluated for the 19 cities. For this evaluation, various daylight performance indices are reviewed since static daylight performance index such as daylight factor (DF) and annual average global illuminance value is not suitable for actual performance evaluation in terms of visual comfort and light energy saving of a space. This study evaluated daylighting performance of prototypical office space module by introducing DA (daylight autonomy) and UDI (Useful Daylight Illuminance) index for major cities of Korea. Result shows that there is upto 18% of illuminance level difference with annual average global illuminance data, but if we consider useful daylight in a space the illuminance level difference among the cities are only within 5%. This means that for sustainable building design especially in daylight design, amount of annual global illuminance is not important factor even in cloudy cities. Daylight design and daylight harvesting system would return similar energy saving impact regardless of building location.