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Preparation of Nanoporous Hollow Vesicle
양원영,변윤섭,김완영,이연식 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
It was attempted to develope a technique which enhances the mechanical strength as well as the stability of the vesicle matrix in addition to fixing the holes in the vesicle membranes. As a polymerizable component, tetraalkylammoium salt containing two stylyl groups at the end of each long alkyl chains was synthesized. In order to induce phase-separation in the vesicle membranes via polymerization, vesicles were prepared from mixtures of the polymerizaole surfactant and nonpolymerizable dipalmitoylphosphatidylcholine(DPPC) in various molar ratios. After polymerization of the vesicles using AIBN as a initiator, they were treated with Triton X-100 or organic solvent to remove from the polymerized membranes, resulting in the formation of the nanoporous hollow vesicles. The vesicles were characterized using DSC, light-scattering, SEM, TEM, and spectroscopic methods such as FT-IR and UV spectrophotometry, etc.
Effects of Floor Impact Noise on Indoor Environmental Comfort
양원영 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.1
The purpose of this study is to investigate the effects of floor impact noise on indoor environmental comfort. Subjective assessments were conducted with 32 university students in an indoor environmental chamber. A 4 (floor impact noise types) × 4 (background noise types) × 2 (background noise levels) × 3 (room air temperatures) × 2 (gender) within-subjects factorial design was employed, and factorial ANOVA was applied to analyze the data. The effect size of floor impact noise on indoor environmental comfort was investigated using partial eta squared from the ANOVA results. The correlation coefficients between indoor environmental comfort and each subjective attributes were calculated. The indoor environmental comfort was highly correlated with the thermal comfort as well as floor impact noise annoyance. The effect size of floor impact noise was greater than that of room temperature on indoor environmental comfort. When floor impact noise occurred, the acoustic environment was more important than the thermal environment with temperatures of 20 to 30°C.
인문계 고등학생의 입시스트레스, 우울 및 자살생각과 ‘빗속의 사람(PITR)’ 그림검사 반응특성과의 상관관계 연구
양원영,원희랑 한국미술치료학회 2013 美術治療硏究 Vol.20 No.2
This study investigated the correlation of high school students' stress from college-bound study, depression and suicidal thoughts with their Person-in-the-Rain (PITR) drawings. The participants were 205 first or second year high school students attending high schools in the city of Seoul. The instruments included a scale measuring their stress from college-bound study, a depression scale, a suicidal thoughts scale, and the Person-in-the-Rain (PITR) drawing test. Data were analyzed using a t-test and correlation analysis. First while there were significant gender differences between the depression and the PITR drawings, no significant differences were found between the stress from college-bound study and suicidal thoughts. Second, the PITR drawings showed little correlation with the variables including the stress from college-bound study, depression, and suicidal thoughts. The subcategory, getting wet by rain showed a very low positive correlation with the stress from college-bound study, depression and suicidal thoughts. The subcategory, non-contact showed a very low positive correlation with the stress from college-bound study and depression. Contact with a puddle also showed a very low positive correlation with depression and suicidal thoughts. Third, the alternative means of stress handling found in PITR drawings showed no correlation with the stress from college-bound study, depression, and suicidal thoughts. The subcategories such as umbrella, facial expressions, and the properness of protective means showed a very low negative correlation with suicidal thoughts. Facial expressions also showed a very low negative correlation with depression. 본 연구는 인문계 고등학생의 입시스트레스, 우울 및 자살생각과 빗속의 사람그림검사에서 나타나는 반응특성이 상관관계를 나타내는지 알아보는데 목적이 있다. 연구대상은 서울의 남․여 고등학교 1․2학년 205명이며, 측정도구는 입시스트레스척도, 우울척도, 자살생각 척도와 ‘빗속의 사람(PITR)’ 그림검사이다. t 검증과 상관분석을 실시한 결과는 다음과 같다. 첫째, 성별에 따른 우울 및 PITR 그림검사 반응특성은 유의미한 차이를 나타냈으며, 입시스트레스와 자살생각은 유의미한 차이를 나타내지 않았다. 둘째, PITR그림검사에서 나타난 스트레스 반응특성과 입시스트레스와 우울, 자살생각 간에는 거의 상관관계가 없는 것으로 나타났다. 즉, 하위영역 중 비 젖음은 입시스트레스, 우울, 자살생각과, 비접촉은 입시스트레스 및 우울과, 웅덩이 접촉은 우울 및 자살생각과 매우 낮은 정적상관만을 보였다. 셋째, PITR 그림검사에서 나타난 스트레스 대처자원 반응특성과 입시스트레스, 우울, 자살생각 간에 거의 상관관계가 없는 것으로 나타났다. 하위영역 중 우산, 얼굴표정, 보호물 적절성은 자살생각과, 얼굴표정은 우울과 매우 낮은 부적상관만을 보였다.
Effects of Indoor Water Sounds on Floor Impact Noise Perception and Overall Environmental Comfort
양원영 한국생활환경학회 2018 한국생활환경학회지 Vol.25 No.5
Water sounds have been known as the most preferred natural sounds and in soundscape studies it has been found that water sounds could improve traffic noise perception. However, studies regarding indoor water sounds are at an early stage. In this study, effects of water sounds on floor impact noise perception were investigated. A factorial ANOVA was used for the five independent variables: water sound type (Foam-jet, Mushroom), water sound level (35, 40, 45, 50 dBA), floor impact noise type (MR: Man Running, ChS: Chair Scraping), floor impact noise level (40, 45 dBA), room temperature (18, 24, 30°C). A total of 54 participants in their twenties volunteered three experimental sessions in an indoor environmental chamber. They heard the recorded water sounds and floor impact noise at the same time, and assessed pleasantness, annoyance, and acoustic comfort of the floor impact noise, and indoor environmental comfort of the chamber. The recorded water sounds did not affect the floor impact noise perception as well and indoor environmental comfort with statistical significance. However, only at 30°C, pleasantness tended to increase and annoyance tended to decrease when the recorded water sounds were presented. Potential effects of water sounds on floor impact noise perception were not only due to acoustic factors but also by indoor environmental factors such as room temperature.