• Korean Journal of Human Ecology
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• v.1 no.2
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• pp.61-74
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• 1998

The purpose of this study is to investigate residents subjective opinion of the noise on the low-rise multifamily house in U.S.A. The results of this study can be applied for the prevention of noise when planning cities, roads, and multifamily houses in Korea. The subjects of this study are three kinds of multifamily houses and their 109 residents in Athens, U.S.A. The results of this study are as follows. The residents felt the noise from lawn mowers and the sound from filter fans of air conditioners were higher than in the other external noise. The residents daily activities were disturbed a little by the external noise. Of the internal noise, the air home sound was recognized a little by residents. They only felt a moderate sound level from the building services of the solid borne sound. They suffered worse from noise in the summer and they felt worse from 16∼20 o'clock due to noise. The residents who were living in town houses felt better than those in the other multifamily houses. (Korean J Human Ecology 1(2):61∼74. 1998)

• Journal of Korean Elementary Science Education
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• v.33 no.3
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• pp.597-606
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• 2014

The purpose of this study is to survey and analyze difficulties in teaching and learning elementary school science on the chapter titled 'electric circuit'. 28 elementary school teachers who teach 5th grade science and 73 5th grade students in elementary school were taken part in this survey. The pilot questionnaire was distributed to find out both the degree and the reason of difficulties in teaching and learning. The answers are analyzed with four areas to extract elements which make class difficult; Learner factors (L), Instruction factors (I), Curriculum & textbooks factors (C), and Environment factors (E). The results are as follows. (1) It can be seen that both students and teachers feel the highest difficulty in 7th lesson 'the direction of current', while they felt little difficulty in lesson 3 'conductor and nonconductor' and lesson 8 'the safety of electricity'. (2) The most mentioned reason of difficulties in teaching and learning was Learner factors (L). (3) Teachers felt many difficulties in experimental environment. On the other hands, students didn't think experimental failures as serious trouble. (4) Students felt many difficulties in new terms and hazy concepts or expressions. (5) Teachers felt a lot of difficulties in those from Curriculum & textbooks factors.

• Journal of Environmental Science International
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• v.23 no.10
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• pp.1745-1753
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• 2014

Sediment microbial fuel cell (SMFC), equipped with Zn, Al, Cu, Fe or graphite felt (GF) anode and marine sediment, was performed. Graphite felt was used as a common cathode. SMFC was single chambered and did not use any redox mediator. The aim of this work was to find efficient anodic material. Oxidation reduction potential (ORP), cell voltage, current density, power density, pH and chemical oxygen demand (COD) were measured for SMFC's performance.. The order of maximum power density was $913mWm^{-2}$ for Zn, $646mWm^{-2}$ for Fe, $387.8mWm^{-2}$ for Cu, $266mWm^{-2}$ for Al, and $127mWm^{-2}$ for graphite felt (GF). The current density over voltage was found to be strongly correlated with metal electrodes, but the graphite felt electrode, in which relatively weaker electricity was observed because of its bio-oriented mechanism. Metal corrosion reactions and/or a complicated microbial electron transfer mechanism acting around the anodic compartment may facilitate to generate electricity. We presume that more sophisticated selection of anodic material can lead to better performance in SMFC.

• Proceedings of the Materials Research Society of Korea Conference
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• 2009.05a
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• pp.57.2-57.2
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• 2009

퍼클로레이트 이온($ClO_4^-$)는 자연적으로 혹은 인공적으로 만들어지며 퍼클로릭산이나 암모늄 퍼클로레이트나, 포타슘 퍼클로레이트 혹은 소듐퍼클로레이트 염의 형태로 존재하며, 물에 아주 잘 녹고, 끓여도 제거되지 않으며, 활성 탄소와 같은 광물에도 흡착 되지 않는 성질로 인해, 기존 물리적인 정수 방법으로는 제거하기 어렵다. 또한 우리 몸에 흡수되면, 요오드가 갑상선에 흡수되는 작용을 방해하여 갑상선 기능장애를 초래한다. 이러한 퍼클로레이트 이온의 제거방법으로는 이온교환법이나 생물학적 방법 등이 개발되어져 있으나, 제거 시스템에 이동 및 안전한 농도까지 제거 등의 문제점으로 인한 퍼클로레이트 이온을 환원시키는 촉매 환원 반응에 의한 퍼클로레이트 이온 제거 기술 개발이 필요하다. 이런 촉매 환원에 필요한 수소 환원제를 발생시키기 위해서, 본 연구에서는 Carbon felt 위에 DC magnetron sputtering에 의한 thin film $TiO_2$과 regine을 이용한 powder $TiO_2$ 시편을 제작하였다. 이렇게 제작 된 $TiO_2$/Carbon felt의 미세구조 및 특성은 XRD, SEM, UV-vis-NIR 등을 통하여 분석하였다. UV 조사에 의해 $TiO_2$/Carbon felt 시편의 산소와 수소 발생과 DC bias의 걸어주었을 때 산소와 수소 발생 차이 등을 비교하였고, 이에 따른 퍼클로 레이트 이온의 분해 영향을 알아보았다.

• Journal of Electrochemical Science and Technology
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• v.14 no.2
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• pp.131-138
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• 2023

The carbon felt is usually hired as electrodes for vanadium redox flow battery (VRFB). In the study, surface modification of carbon felt under CO₂ atmosphere with variables of operating various temperature ranges between 700℃ and 900℃. The qualitative and quantitative analysis were carried out such as scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) to observe degree of surface modification. Result of XPS analysis confirmed increase of carbon and oxidation functional group on the surface with increase of temperature. SEM image was discovered similar phenomena. Electrochemical characteristics such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) revealed the improved electrode performance with increase of temperature. However, the electrochemical performance under treatments temperature of 900℃ was less than that of under treatment temperature of 850℃ due to weight loss at the treatment temperature of 900℃. From the CV and EIS results, the best electrochemical characteristics was at the temperature of 850℃. That of at the temperature of 900℃ was decreased due to weight loss. The energy efficiencies (EE) obtained from full cell test were 69.37, 80.76, 82.45, and 75.47%, at the temperature of 700, 800, 850, and 900℃, respectively.

• Applied Chemistry for Engineering
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• v.21 no.6
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• pp.680-683
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• 2010

Nano carbon balls (NCBs), activated carbons (ACs) and their mixture (new carbon mixtures, NCMs) were used to reduce volatile organic compounds (VOCs) emitted from the automobile felt. The optimum analytical method to measure the trace amount of the VOCs, including formaldehyde and acetaldehyde, has been established by utilizing high performance liquid chromatography (HPLC) and gas chromatography (GC). The levels of formaldehyde and acetaldehyde released from newly produced felt were in the ranges of 0.3~6.0 ppm and 0.2~3.0 ppm, respectively. After 14 days of aging at the room temperature, however, their levels were still in the ranges of 0.2~0.5 ppm and 0.2~0.4 ppm, respectively. By applying NCMs of 2 wt% to the automobile felt, the amount of the total volatile organic compounds (TVOCs) was reduced under the chronic inhalation minimum risk level of $0.32mmmm{\mu}g/TP$.

• Science of Emotion and Sensibility
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• v.20 no.3
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• pp.71-88
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• 2017

This paper compared self-validation and regulatory focus between consumers who felt happy vs. sad prior to decision and explored the effects of self-validation on regulatory focus and information distortion. The results of empirical analysis are as follows. First, consumers who felt happy beforehand revealed larger self-validation and stronger promotion focus than those who felt sad in advance. Second, compared to sadness, just-felt happiness was found to have partially positive impact on promotion focus by means of self-validation and exercise entirely positive impact on information distortion through mediation of self-validation. This study has made theoretic contributions by identifying the differences in the extent of self-validation and promotion focus between happiness and sadness as ambient emotion felt prior to the impending decision making as well as by investigating the effects of self-validation upon information distortion.

• Physical Therapy Korea
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• v.10 no.3
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• pp.127-140
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• 2003

The purpose of this study was to determine the factors affecting on the home treatment stress in the CP (cerebral palsy) children's mothers. Direct interviews were conducted from March 17 with April 4, 2003 with 97 mothers of CP children. The average level of stress from home treatment felt by mothers with CP children was $16.97{\pm}4.04$. Stress-levels were especially high in mothers who were not satisfied with the treatment outcome (p<.05) and whose acceptance of disability was low (p<.01). Stress felt by mothers was low when their health status was high (p<.05). A physical burden was shown to have a significant correlation with the stress of the mothers during the home treatment (p<.01). Mothers with a child of Level 2 disability had lower levels of stress than those with a child of Level 4 or 5 disability (p<.01). The level of stress was higher in mothers who lagged in acquiring technical sufficiency (p<.05). Multiple regression analysis showed that one factor affecting the stress felt by mothers with CP children was the degree of acceptance of the disability (p<.01). Programs that can reduce the stress levels of mothers with CP children through home treatment and secure social systems such as professional help and economic compensation, need to be developed. Active policies should be established and executed for these mothers since stress felt by mothers significantly affects the consistency and effectiveness of treatment provided at home.

• Journal of the Korean Society of Costume
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• v.63 no.3
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• pp.1-16
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• 2013

Xiognu people were the first of the Central-Asian nomads to establish a nation in 209 B.C. They always moved around looking for places to breed their animals and fertile grounds, so they wore clothes made of fur and leather and covered their tents with felt from the livestock. This research studies on the literatures, costumes and the achievement of archaeological excavation. Furthermore, to investigate on costumes excavated of Xiongnu, we visited the Mongolian National Museum and the Hermitage Museum. A corn-hat made of felt, a felt hat with ear flaps and a golden crown with a bird on the top were unearthed from a tomb of Xiongnu in Inner mongolia. Women usually wore pigtails, and men wore pigtails or ponytails but they cut their hair short when holding a funeral. Many pigtails discovered in Noyon uul tombs can be considered as their funeral customs. The Xiongnu wore a round or v-neck caftan attached straight sleeves reaching knees in the left folded style, and because they always rode horses, having the length of the caftan not go past their buttocks would have made it more convenient for them. During the period of Western Han, Ho refered to Xiongnu and it became a common name for northern races. They used leather belts and an animal-designed buckle was found. Women commonly rouged their cheeks for a vivid and cute look, and many ornaments were excavated including bracelets, rings and decorations made of gold, silver, copper and jade, among which there were hair ornaments used to identify one's class. A horse pattern with wings and a horn of Golmod T20 was substitution for the Schythian use of deer. Patterns or shape of unearthed articles present in the Xiongnu culture in Noyon uul had a close relationship with Altaic, Greek and Persian cultures. The Xiongnu clothing was made of animals' skin and fur, woolen textiles and felt. It was folded to the left for upper garments, and the pants were adjusted using a belt and shoes were made of leather, which was very suitable for protection against the cold and horse riding. Mobility played a significant role in their clothing.

• The Journal of Industrial Distribution & Business
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• v.9 no.5
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• pp.73-81
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• 2018

Purpose - When indulging in hedonic items is construed as wasteful and evokes anticipated regret or guilt, consumers are more likely to seek reasons to justify their indulgence. Justification requirement for spending on indulgences over necessities could lead to the places of their finding the ways that mitigate the anticipated regret and guilt. However the previous research focusing on consumers' own great effort leading to positive outcomes has not given much attention to other's outcomes induced from his or her little or no efforts, by which consumers could feel envy. The guilt associated with consumers' indulgence could vary according to envy type felt according to their evaluation about other's outcomes and their self construal level. Current research explored the envy type's effects on consumers' spending on hedonic products, and moderation effects of self construal level on the envy type's effects. Research design, data, and methodology - 2(envy type: benign versus malicious) × 2(self construal level: high versus low) between-subjects design was employed. Data for empirical analysis were from 173 undergraduate participants. ANOVA was used to verify hypotheses. Results - The tendency of choosing utilitarian product versus hedonic product was moderated by the envy type. The participants who felt benign envy were more likely to choose utilitarian product versus hedonic product than those who felt malicious envy were. And the tendency of benign envy-felt participants' choosing hedonic versus utilitarian product was more weakened to those with lower-level self construal than to those with higher-level self construal. However the tendency of malicious envy-felt participants' choosing hedonic versus utilitarian product was not moderated by the self construal level. Conclusions - This research could advance the theory related to indulgent hedonic consumption by exploring the effects of self construal level and envy type on hedonic indulgence. In view of the results from current study, marketers should make efforts of communicating and selling utilitarian products to persuade consumers with lower-level construal when they feel benign envy to others. And they should conduct marketing acts for hedonic products to persuade consumers when they feel malicious envy to others.