• Journal of Information Display
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• 제10권4호
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• pp.188-194
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• 2009

Conventional stereoscopic (3D) displays using binocular parallax generate unnatural conflicts between convergence and accommodation. These conflicts can affect the observer's ability to fuse binocular images and may cause visual fatigue. In this study, time series changes in visual fatigue and depth sensation when viewing stereoscopic images with changing parallax were examined. In particular, the physiological changes, including the subjective symptoms of visual fatigue, when viewing five parallax conditions, were examined. Then a comparative analysis of the 2D and 3D conditions was performed based on the visual function. To obtain data regarding the visual function, the time series changes in the spontaneous-blinking rate before and during the viewing of 3D images were measured. The time series change results suggest that 2D and 3D images cause significantly different types of visual fatigue over the range of binocular disparity.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1099-1102
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• 2009

Conventional stereoscopic (3D) displays using binocular parallax generate unnatural conflicts between convergence and accommodation. Those conflicts can affect the ability to fuse binocular images and may cause visual fatigue. This study examined time-series changes in visual fatigue and depth sensation while viewing stereoscopic images with changing parallax. We examined the physiological changes, including the subjective symptoms of visual fatigue, when viewing five parallax conditions. The time-series results suggest that 2D and 3D images produce significantly different types of visual fatigue over the range of binocular disparity.

• 한국의류학회지
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• 제12권1호
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• pp.81-91
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• 1988

The purpose of this study is to investigate the physiolosical responses and subjective wear sensation to the clothes with different cellulose composition. The experimental garments were four types of cellulosic fabrics, respectively composed of $100\%$-cotton, $100\%$-Rayon, cotton/Flax 85/15, and rayon/Flax 85/15 (weft blended), were sewn in blouses with half-length sleeves. Four healthy women were chosen for this experiment. The condition of the experimental room were in two environments: Temp., $25{\pm}1^{\circ}C$, R.H. $60{\pm}3\%$ and Temp., $30{\pm}1^{\circ}C$, R.H. $70{\pm}3\%$, and air velocity was maintained at 0.25 m/sec. The results are as follows. 1) At $25^{\circ}C$, rayon blouse showed the pleasantest feeling because of its excellent humidity sensation and tactile sensation. At $30^{\circ}C$, rayon and flax blended blouse showed most comportable sensation. In both environments, blouse of $100\%$ cotton showed the least pleasant because of high vapor pressure inside the blouse and bad tactile sensation. 2) Vapor pressure inside the blouse and tactile sensation play the most impotant role in comfort. Consequantly the blouse made of $100\%$-cotton which bring low air permeability, moisture regain and water vapor permearbility showed more unpleastness than rayon blouse because it raises temperature, relative humidity and vapor pressure inside the blouse under the hot circumstances In the conditions with much sweat, rayon and flax blended blouse with high stiffness increases comfort better than $100\%$ rayon because the former prevents sticking to the skin.

• Journal of Korean Dental Science
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• 제4권1호
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• pp.14-19
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• 2011

Purpose: The aim of our study was to evaluate natural recovery of neurologic injury after minor dental surgery based on subjective neurologic evaluation. Materials and Methods: From December 2005 through July 2009, 30 patients from Seoul National University Bundang Hospital were identified as having been treated with minor dental surgery. The patients were composed of 12 men and 18 women, with a mean age of 50.6 years. The median duration of this study was 62 weeks. Results: The patients were treated by implants (17 cases), tooth extractions (6 cases), bone grafts (4 cases), inferior alveolar nerve transpositions (2 cases) and periodontal surgery (1 case) prior to the occurrence of altered sensation. Areas of altered sensation after minor surgery included the lip (36.7%), chin (30.0%) and tooth (21.7%), and at final follow-up, there was no change of ranking. Altered sensations expressed by patients included numbness (33.3%), discomfort (22.9%), relieving sense (14.6%), tingling (14.6%) and itching (14.6%). There was no change of ranking of altered sensation at the last follow-up. Patients experienced the altered sensation always (47.8%), during tactile stimulation (26.1%), when chewing food (13.0%), and talking (13.0%). Mean visual analogue scale (VAS) was $3.43{\pm}2.84$ for pain and $6.64{\pm}2.72$ for paresthesia. VAS of pain was decreased significantly between the first visit and the end of follow-up, and paresthesia also showed a significant difference. Conclusion: Altered sensations may occur at any time after minor dental surgery, but we observed that natural recovery of altered sensation occurred as time went on.

• 종양간호연구
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• 제11권3호
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• pp.229-236
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• 2011

Purpose: The purpose of this study was to examine the sensation changes in upper extremity and the quality of life for post-operative mastectomy patients. Methods: This study used a descriptive study design. The participants were 132 women who had mastectomies after being diagnosed with breast cancer and were participating in breast cancer self-help groups. The sensation changes in the arm of the surgery site was measured by the arm symptoms which were subjective uncomfortable feelings of the affected arm, and the quality of life was measured by Medical Outcomes Study Short Form-36. Collected data were analyzed by ANOVA, t-test, ${\chi}^2$-test and multiple regression with SPSS WIN 12.0 program. Results: Patients with stage IV breast cancer had severe changes in sensation of the arm. Participants with lymphedema had statistically significant changes in sensation compared to participants without lymphedema, but the quality of life was not different between the two groups. Pain by the SF 36 was statistically different between the two groups, with- and without-lymphedema. The factors in upper extremity's sensation changes which influence on quality of life were pain and heaviness. Conclusion: Nursing intervention for relieving pain and heaviness of the affected arm needs to be developed in order to improve QOL of the breast cancer survivors.

• KIEAE Journal
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• 제16권5호
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• pp.29-37
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• 2016

Purpose: Indoor thermal comfort can be identified by combination of temperature, humidity, and air flow, etc. However, most thermal indexes in regard to thermal comfort are temperature dominant since it has been considered as a significant factor affecting to indoor thermal comfort The purposes of this study are to investigate indoor neutral temperature range of young Koreans with humidity perception, and to introduce a neutral temperature for temperature preference as well as temperature sensation in order to define the neutral temperature range chosen by occupants. It could be used as basic data for heating and cooling. Method: 26 research participants volunteered in 7 thermal conditions ($18^{\circ}C$ RH 30%, $18^{\circ}C$ RH 60%, $24^{\circ}C$ RH 30%, $24^{\circ}C$ RH 40%, $24^{\circ}C$ RH 60%, $30^{\circ}C$ RH 30%, $30^{\circ}C$ RH 60%) and completed subjective assessment in regard to temperature/humidity sensation and preference twice per condition in an indoor environmental chamber. Result: In RH 30%, sensation neutral temperature was $25.1^{\circ}C$ for men and $27.0^{\circ}C$ for women, and preference neutral temperature was $25.5^{\circ}C$ for men and $27.8^{\circ}C$ for women. In RH 60%, sensation neutral temperature was $23.6^{\circ}C$ for men and $25.9^{\circ}C$ for women, and preference neutral temperature was $23.4^{\circ}C$ for men and $26.3^{\circ}C$ for women. Neutral temperature increased with increasing relative humidity. Women were sensitive to humidity changes. Men expressed humidity changes as temperature variations. In most conditions, preference neutral temperatures were higher than sensation neutral temperatures, however, the preference neutral temperature for men in humid condition was lower than the sensation neutral temperature.

• 대한한방부인과학회지
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• 제35권1호
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• pp.1-11
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• 2022

Objectives: Management of the postpartum period is important for the health of mothers, and postpartum edema is one of the management targets. In this study, the relationship between the value measured by the device and the postpartum edema sensation was examined to explain the subjective sensation of the mother as an objective value. Methods: Data from 54 cases provided by 24 mothers within 6 weeks postpartum were used in the study. The degree of postpartum edema sensation was measured using a visual analog scale (VAS), and the effect of VAS changes on the body edema index and weight change before and after childbirth was estimated through linear regression analysis. Results: As a result of the regression analysis, when the edema sensation of the mothers VAS increased by 1 point, the Inbody edema index increased by 0.002 points (p=0.000, R²=0.272), and when the VAS increased by 1 point, the weight gain increased by 0.99 kg compared to before pregnancy (p=0.000, R²=0.243), and when VAS increased by 1 point, weight loss decreased by 0.56 kg compared to just before childbirth (p=0.004, R²=0.136). Conclusions: The results of this study, in which the edema sensation of postpartum mothers was statistically significantly related to the edema index and weight change before and after childbirth, showed that the edema sensation complained by the mother could be used as an evaluation index for postpartum edema management in the future.

• 조명전기설비학회논문지
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• 제25권2호
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• pp.43-52
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• 2011

LED lighting may cause different sensation and color appearance due to the different spectral power distributions compared to those of conventional lightings. Particularly, the CCT (Correlated Color Temperature) of LED lighting has a major effect on color appearance so that this study conducted an experiment through a subjective evaluation and luminance measurement for effective color appearance in a space. This study performed a subjective evaluation under the seven different LED CCT conditions, and color appearance was evaluated with major five colors in a customized lighting box. In addition, luminance measurement was conducted for each CCT and color condition to compare the results from a subjective evaluation. The results of this study may help to select a proper LED CCT for specific color conditions.

• 한국의류학회지
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• 제27권11호
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• pp.1279-1290
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• 2003

The purpose of this study was to make a scale for measuring the subjective hand of fabrics. For this purpose subjective hand expressions which were published in the journals were reviewed. 11 pairs(9 biopolar-pairs, 2 unipolar-pairs) were selected after searching the definitions in a dictionary followed by focus group interview and survey. To find out if these terminological biopolar pairs are agreed with the biopolar pairs in human sensation, a survey of fabric hand was undertaken using a scale consisted of 20 words(18 words from biopolar-pairs, 2 words from unipolar pairs). Among 11 pairs, 10 pairs except [taktakhada-poksinhada] were accepted as biopolar pair of word terminologically and sensuously. [taktakhada-poksinhada] was recognized as a biopolar pair terminologically but not sensuously. These 20 words were classified as 5 factors-surface contour, density, flexibility, dampness, and extensibility

• 한국의류학회지
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• 제15권1호
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• pp.61-69
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• 1991

In order to investigate the comfort properties of aerobic wear with different materials, the physiological responses, subjective wear sensation and microclimate were measured. The experimental garment were all-in·one type with half·length sleeves made of cotton/ polyurethane and nylon/ polyhrethane fabrics. The conditions of the experimental room were controlled to maintain two type of environ- ments, i.e. $25{\pm}1^{\circ}C$, $60{\pm}5\%$ R. H. and $30{\pm}1^{\circ}C$, $70{\pm}5\%$ R.H., Air velocity was maintained at 0.25 misec all the time. The results are as follows; 1) At $25^{\circ}C$, mean skin temperature and comfort sensation were not significantly different among 2 types of materials. 2) At $30^{\circ}C$, aerobic wear made of cotton/polyurethane fibers showed better pleasant tactile sensation than that of nylon/polyurethane fibers. 3) Under both environmental conditions, microclimate of two types of aerobic wear was not significantly different. 4) Among several aspects of wear sensations, tactile sensation was the most powerful factor to differenciate material differences of aerobic wear.