• Korean Chemical Engineering Research
• /
• v.46 no.4
• /
• pp.756-763
• /
• 2008

The aim of this work was to obtain uniform and well-dispersed spherical silver nanoparticles using statistical design-of-experiment methods. We performed the experiments using 2 k fractional factorial designs with respect to key factors of a general chemical reduction method. The nanoparticles prepared were characterized by SEM, TEM and UV-visible absorbance for particle size, distribution, aggregation and anisotropy. The data obtained were analyzed and optimized using a statistical software, Minitab. The design-of-experiment methods using quantified data enabled us to determine key factors and appreciate interactions between factors. The measured properties of nanoparticles were dominated not only by individual one or two main factors but also by interactions between factors. The appropriate combination of the factors produced small, narrow-distributed and non-aggregated silver nanoparticles of about 30 nm with approximately 10% standard deviation.

• Conservation Science in Museum
• /
• v.10
• /
• pp.15-20
• /
• 2009

This paper introduces a conservation treatment for silver diadem ornaments with flower design and the types of corrosive chemical compounds. Twelve silver diadem ornaments with flower design from the Baekje period excavated thus far have been classified into four types. This classification is made more specific in this paper. Each of the silver diadem ornaments was compared with one another. The comparison showed that the same production technique had been used for all of them, but they differed in size and thickness. This suggests that only a few pieces were produced whenever needed, rather than many pieces being produced at the same time.

• Bulletin of the Korean Chemical Society
• /
• v.34 no.10
• /
• pp.2863-2864
• /
• 2013

• Journal of the Ergonomics Society of Korea
• /
• v.28 no.4
• /
• pp.161-166
• /
• 2009

Although the entrance of house has been identified as a hotspot for older adults' fall accidents, there was not any lift chair to prevent older adults' accidents. In this study, a lift chair was developed to reduce fall accidents that can occur when older adults put on or take off their shoes in the entrance. In order to develop the product, we considered two aspects. Firstly, we considered older adults' anthropometric data to determine the design specification of the product. Also we considered the environmental characteristics of space using the product. In order to overcome the limited spatial freedom and use the entrance space effectively, we took a simplified and folding type for the product.

• Fashion & Textile Research Journal
• /
• v.8 no.5
• /
• pp.496-504
• /
• 2006

This study was conducted for silver generation women, age 60 and more. Questionnaire was answered by the total 291 of women. Frequency analysis, t-test, ANOVA and Duncon-Test have been completed by using SPSS 12.0 tool. The conclusion of the study is below. First, silver generation women live in Seoul and South Gyeongsang Province. The data shows huge academic background gab among regions. Second, the following is the preferences found by 15 stimulants which expert groups identified based on demography. People in South Gyeongsang Province like default, tailored, three-button jacket more. People in South Gyeongsang Province prefer to Chanel jackets and people in their 70s prefer to it than in 60s, stand collar casual jacket for color and material, and the less they are educated, the more they like the jackets. And those who have less personal expenses tend to prefer to it. South Gyeongsang Province shows preference for semi polo-neck sweater. Highly educated did not show any preference for it. Women in their 70s tend to like blouses with round neckline. The data shows there is significant difference of preference for design, color and material for coloration vest between education levels. The less educated tends to like it. People in South Gyeongsang Province and those who live with their children are in favor with half sleeve jackets for colors and materials. All in Seoul and South Gyeongsang Province do not like three-quarter-length sleeve jackets because those jacket have wide and deep plunging neckline. The study showed people living in Seoul, in their 60s, highly-educated tend to favor polo shirts significantly. Seoul favor basic straight pants and people with any level of education excluding elementary prefer to it. The highly-educated and those who have a bigger allowance tend not to prefer to baggy trousers. In conclusion, Fifteen incentives (clothing design) for semi polo-neck sweaters, polo t-shirts, basic straight pants are more proper to silver generation women in their 60s, living in Seoul. Other designs are desirably applicable to customers on a national scale at middle prices.

• Fashion & Textile Research Journal
• /
• v.6 no.6
• /
• pp.810-814
• /
• 2004

This study is one of the fundamental researches for the development of future smart clothing and textile products using silver(Ag) nano powder. Our study was focused on the blocking or insulating effects of nano-processed textiles from electromagnetic waves. Also, for the surveying of the actual effect to human body, we measure the variation of electroencephalogram which is an indication of human physical symptoms. Among various textiles in this experiment, nano silver processed case has shown the best blocking performance from the electromagnetic waves, which decreases depending on the distance. As a reference model of working environment, we setup the visual stimuli object on the computer that is a source of electromagnetic wave. The power spectrum distribution and the incidence of electroencephalogram was measured. The analysed data has shown that, with nano-processed textiles, ${\beta}$ wave does not appear very often where ${\beta}$ wave appears only to illustrate the stable states of human's body. However, as for the materials without nano processing, the ratio of ${\gamma}$ waves in the total level of electroencephalogram becomes higher in spite of short exposure to visual stimuli in work environment, which shows that the worker becomes stressed. The ${\beta}$ wave electroencephalogram of all materials is drawn in calcarine fissure of occipital lobe to show the convergent distribution, and stronger with block-processed Nano Silver Silk(NSS). The study based on the potential risks of human diseases such as physical fatigue by electromagnetic waves, and has shown that the application of Nano Silver textile for human uses require a proper particle size of it which would not penetrate cellular tissues, and a proper binder and binding treatment for it. However, it is highly required for back-up researches to verify various aspects in applying nano silver to textile products.

• Journal of the Architectural Institute of Korea Planning & Design
• /
• v.35 no.9
• /
• pp.41-48
• /
• 2019

Recently as the rapid increasing of the elderly, silver housing has grown up. Though much fire evacuation and safety law, fire accident is most dangerous problem in our society. So this study is the purpose to analyze evacuation safety in urban silver housing of floor planning by corridor types using human behavior simulation. The methodology of this study is 'Literature Review' and 'Simulation'. This study has been carried out on silver housing's definition, types, fire safety theory and relation law. To proof evacuation safety, this study measured escaping time, longest distance, and bottleneck counting using human behavior simulation. This study use game engine simulation program to analyze 6 corridor types experimental model. As the result of simulation, this study compare between ASET and simulation result. The result come down to 3 part. First, double loaded corridor type is the most dangerous on urban silver housing. Second, Safe shelter's location and number cause increasing of escaping time. Lastly escaping time is influenced by behavior of agent, bottle neck strike frequency.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.05a
• /
• pp.785-788
• /
• 2008

최근 우리 사회의 인구 구성 중, 노인 인구 비율이 크게 늘어남에 따라 실버 세대를 위한 체계적이고 신속한 의료 환경이 요구되고 있다. 이러한 요구에 의해 유비쿼터스 IT 기술과 센싱, 네트워크 인터페이스 등을 통한 새로운 건강 관리 서비스인 U-SilverCare 서비스 개발이 활발하게 이루어지고 있다. 본 논문에서는 가속도 센서(Accelerometer)를 이용하여 실버 세대를 위한 U-SilverCare 응급상황통보 서비스를 구상 및 구현한다.

• 한국데이터정보과학회:학술대회논문집
• /
• 2005.04a
• /
• pp.174-181
• /
• 2005

소규모의 사회복지 시설들은 대규모의 전문병원들이 갖춘 고 부가가치 전산 시스템들을 갖추고 있지 못하다. 그러므로 소규모의 사회복지시설들은 관리 및 서비스의 질적 향상을 기대할 수 없다. 이로 인해 경영관리와 서비스 차원에서 차이가 발생한다. 소규모에서 관리과 서비스의 향상을 위해 본 연구에서는 소규모 사회복지시설(Silver-town)에 적합한 통합 의료정보 데이터베이스시스템을 설계하여 제안하고자 한다.

• Proceedings of the Safety Management and Science Conference
• /
• 2010.04a
• /
• pp.127-135
• /
• 2010

In this paper, the u-Service system that is based on location-aware technology is designed for a silver town. It provides services such as emergency call, intelligent elevator operation, and hands-free door access based on the location of the residents with personal device as called smart tag. It can also be applied to other service areas such as the location-aware u-Service for Hospital, high-rising complex building, APT, etc.