• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.355-360
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• 2017

This study was aimed to analyze the increased forestry incomes by combining timber production and wood processing, which is one of 6th industrialization types in Korean forestry. The selected household has been engaged in forestry for two generations and they produce timber and associated wood products in their own facility. The wood products include dimension lumber, interior wood material, cutting board, and cube chips, the household also utilize logging and sawmill residues as well as seed and seedlings as by-products. Incomes and expenses that have been incurred on individual processes of the sequential timber production and wood processing were surveyed, and we analyzed the economic outcomes of entire business. The results of this study indicate that the gross income of the household is 122.3 million Korean won and the net income is 93.6 million Korean won. The net income of the household is approximately 2.8 times higher than the average net income of whole households in the forestry of Korea in 2016, which is approximately 4.3 times higher than that of households that have been particularly engaged in timber production over the country. We found that the 6th industrialization by combining the two sequential processes creates approximately 3.2 times as much added value compared to the case relying on timber production only.

• 패션비즈니스
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• 제22권1호
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• pp.82-99
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• 2018

The purpose of this study is to examine the characteristics that appeared in the fashion and colors of exotic tastes used by Renoir with a view to re-evaluating his-attitude towards exotic tastes. The methods used in this study were literature research and analysis of visual data from Renoir's works. The results of the study are as follows. Renoir's exotic tastes originated from the material perspective appearing in the fashions and accessories of Algeria, Orient, Spain, and Japan. Parisienne Odalisque Lise in Harem-style, Jeanne Samari in parisienne fashion holding a Japanese fan, and Gabriel in oriental fashion were portrayed as major muses. The Algerian style consisted of white, yellow or red veils, thobes, loose pants worn in Haik, and burnous. The Oriental-style was composed of harem pants, turbans, hair accessories, ornate zouave jackets, and oriental ornaments. The Spanish-style showed gay ornaments, fitted red or yellow matador costume, red bandannas, black hats, and red dresses, plus Spanish guitars. The Japanese-style consisted of kimonos, accessories such as fans, and backgrounds with interior articles such as vases, wall picture frames, and folding screens. The exotic fashion colors were red, yellow and white. Renoir expressed the works with his delicate skills and sense of craftsmanship, and he even added creative design portrayals sometimes. He selected fashions and accessories of exotic tastes as objects and expressed the objects with materials and colors reflecting regional characteristics as such, he can be regarded as an artist wed to who fashions of exotic tastes.

• 한국가구학회지
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• 제17권4호
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• pp.1-13
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• 2006

This study attempted to identify the characteristics of chair design from furniture company, $K{\ddot{a}}llemo$, the furniture manufacturer in Sweden manufacturing mostly the limited edition of art furniture on the basis of the unique management philosophy. There are 12 artists manufactured chairs for $K{\ddot{a}}llemo$. Of them, this study selected 4 artists-Sigurdur Gustafsson, John Kandell, Komplot Design, Mats Theselius-who designed at least more than three chairs. Total 25 chairs were analyzed; 6 from Sigurdur Gustafsson, 8 from John Kandell, 3 from Komplot Design and 8 from Mats Theselius. The chair structure was divided into three parts, seat, back and structure and analyzed by material, color, type of legs and finishing. The following results were derived from the study. First, $K{\ddot{a}}llemo$ secured the regular customers who want to possess the chairs as the artistic works by continuing the small quantity mass-production system insisting that the maximum quantity of production is 360 pieces and the minimum quantity is 33 pieces. Second, the sufficient time and cost were invested in the initial phase of design. This approach seems to be deviated from the traditional business system that has to create the revenue at a glance, but ultimately induces the commercial success by exponentially increasing the revenue through the creation of various product lines. Third, $K{\ddot{a}}llemo$ provides the space that the artists who work for $K{\ddot{a}}llemo$ can sufficiently enjoy the mental composure and luxury required for the designers by strictly selecting the artists and providing the best environment for enabling the creative activities that look like the pure art area. This study enables the further analysis and research on other collections of $K{\ddot{a}}llemo$ that mass-produces the chairs on the basis of the unique philosophy in the world as well as in Sweden using more various kinds of analysis frameworks.

• 한국강구조학회 논문집
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• 제10권1호통권34호
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• pp.125-135
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• 1998

본 연구에서는 내측지점의 상승 하강을 이용하여 부모멘트구간에 프리스트레스를 도입하는 3경간 연속 프리플렉스 합성형교의 설계방법을 제시하고 이를 전산 프로그램화하여 최적설계를 수행하였다. 최적설계를 위한 목적함수로는 3경간 연속 프리플렉스 합성형교의 재료비용으로 결정하고, 제약방정식은 설계과정 및 시방서에 명시된 최소 설계단면제원과 부재별 허용응력에 근거하여 구성하였다. 최적설계기법으로는 기존의 2경간 최적화 연구에서 제시된 수치적 최적화기법의 하나인 순차 비제약 최소화기법을 재검토 및 수정하여 설계를 수행하였다. 민감도분석 결과에 근거하여 지간길이에 따른 최적설계단면을 결정하고, 여기서 정해진 최종 설계단면을 단순보형 프리플렉스 합성형교의 설계단면과 비교하였다. 그리고 각 지간별 합성보의 형고를 변화시키면서 최적화를 수행하여 형고와 재료비용과의 관계도를 제시하고 최적형고를 결정하였다.

• 한국재료학회지
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• 제16권11호
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• pp.692-697
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• 2006

Deodorization of natural zeolites have been improved not only for polar but also for non-polar pollutants by sucessive ion exchanges of H and Ag ions starting from Korean natural zeolite with high adsorption capacity. The modified zeolites with $TiO_2$ coating on the surface revealed high deodorization and photocatalytic decomposition effects. Further modification was made with $10{\sim}20nm$ silica nano particles coating on the surface, the resulting composite particles of $SiO_2/TiO_2/modified$ natural zeolite revealed not only comparable deodorization but also better durability and resisatnce to color change compared to the $TiO_2$/modified natural zeolite without much compensation of photocatalytic decomposition effect, when the composite particles were exposed to the polypropylene non-woven fiber coated with organic binder. It is expected for the composite particle prepared here to be used as indoor building materials for indoor air quality control.

• 대한기계학회논문집A
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• 제36권1호
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• pp.1-7
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• 2012

이 논문에서는 최소의 배터리를 소비하여 물고기 로봇을 구동하고, 물고기와 같은 유연한 운동을 할 수 있는 생체 모방(biomimetic) 물고기 로봇의 설계, 제작, 제어에 관하여 제안 하였다. 두 개 모터를 적용하여 물고기와 같이 유연하게 움직일 수 있는 방법을 제시 하였다. 중성 부력을 유지하는 방법과 빠르게 잠영하고, 방향을 전환 하기 위한 방법을 제시 하였다. 로봇 물고기의 꼬리는 유연한 움직임을 만들기 위하여 폴리머 재질을 사용하여 만들었다. 꼬리 내부는 관절과 강선으로 구성된다. 로봇 물고기에 척추에 해당하는 우레탄 골격과 관절을 이루는 핀에 연결된 강선을 당겨 꼬리에 정현파 명령을 주어 물고기와 비슷한 유영을 할 수 있도록 하였으며, 부력 조절 장치를 설치하였으며, 이 부력 조절 장치를 이용하여 물고기 로봇이 상승, 하강을 할 수 있도록 하였다.

• 한국기계가공학회지
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• 제20권10호
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• pp.44-49
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• 2021

Seats in autonomous vehicles must be able to rotate to fully utilize the interior space. Generally, ultra-high strength steel is used for the rotation module because it should have high strength and high rigidity. In addition, the rotating parts are difficult to form because they have complex shapes. In this study, the upper plate of the rotating module, whose complex shape makes it difficult to form, was formed by applying the hot stamping method. The drawing method and the form-drawing method, which are generally used to form components of complex shapes, were compared. We showed that the form-drawing method increased the degree of freedom of the material flow to improve the formability, thus enabling the forming of the plate. In addition, the die and blank shapes were found to be important factors in determining the success of the hot stamping. The validity of the analysis results was confirmed through forming analysis and experiments.

• 한국산업정보학회논문지
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• 제27권2호
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• pp.101-113
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• 2022

서비스 산업의 고도화로 인한 기업 간 경쟁의 심화와 가속화는 서비스 소비자들이 원하는 서비스의 품질 수준을 높였고, 이러한 소비자의 동향은 급변하는 기술의 수용과 코로나19라는 특별한 상황을 감안해야 하는 공공영역의 서비스 제공 환경에도 적지 않은 영향을 미치고 있다. 이에 본 연구는 『ISO18091:2019』을 기반으로 행정안전부에서 개발한 공공서비스 품질관리 프레임워크를 기초로 개발된 교육교재를 활용하여 공공기관의 종사자를 대상으로 교육을 한 후 설문을 통해 교재의 적용 가능성을 검토하였고, 실제 개선활동에 참여한 공공기관 종사자를 대상으로 인터뷰를 진행한 필드스터디 결과를 바탕으로, i)데이터 활용 및 검증, ii)공공서비스의 광범위성, iii)서비스 제공기관의 규모/역량의 세 가지 관점에서 공공서비스 품질 수준을 제고하기 위해 고려해야 하는 시사점과 가이드라인을 제시하였다.

• 기록학연구
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• 제74호
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• pp.155-186
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• 2022

2022년 현재 행정안전부 정부24 웹사이트에 등록된 공공부문 인터넷 웹사이트는 1만 7천여 개이다. 이처럼 많은 웹사이트를 기록으로 관리하기 위해 기록물 생산기관과 기록물관리기관이 상호 간 직접 이관하는 방식은 많은 인적·물적자원을 필요로 한다. 각 웹사이트 구동에 필요한 운영 소프트웨어와 응용소프트웨어 기술을 기록물관리기관이 보유하고 운영하는 것도 현실적으로 어렵다. 이러한 현실적 한계를 극복하기 위해 웹수집 소프트웨어를 이용하여 원격지에서 웹사이트를 자동으로 수집하는 방식이 국내외에서 사용되고 있다. 이 연구는 공공부문 인터넷 웹사이트를 원격으로 수집하여 기록으로 관리할 때 필요한 웹수집기의 성능을 비교하였다. 선행연구 및 문헌조사 등에서 검토한 다수의 웹수집 소프트웨어에 대하여 단계별 검토를 거쳐 가장 적합한 웹수집기를 선정하였다. 성능 평가 과정에는 일부 공공기관 웹사이트를 대상으로 실제 원격 수집 성능을 비교하였다. 이 연구 결과는 웹기록 관리를 위해 웹수집기 선택이 필요한 기관에 실증적이고 구체적인 성능 비교 정보를 제공한다.

• Design & Manufacturing
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• 제16권1호
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• pp.27-35
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• 2022

Thermoforming is a plastic manufacturing process that applies a force to stretch a film of heated thermoplastic material over an engineered mold to create a 3-dimensional shape. After forming, the shaped part can then be trimmed and finished to specification to meet an end-user's requirements. The process and thermoplastic materials are extremely versatile and can be utilized to manufacture parts for a very wide range of applications. In this study, based on K-BKZ nonlinear viscoelastic model, thermoforming process analysis was performed for an interior room-lamp. The predicted thickness was minimum at the corner of a molded film, and maximum at the center of the bottom. By using the Taguchi method of design of experiments, the effects of process conditions on residual stresses were investigated. The dominant factors were the liner thickness and the film heating time. As the thickness of the liner increased, the residual stress decreased. And it was found that the residual stress decreased significantly when the film heating temperature was higher than the glass transition temperature. A thermoforming mold and a trimming mold were manufactured, and the spring back was investigated through experiments. The dominant factors were film heating time, liner thickness, and lower mold temperature. As the film heating time and liner thickness increased, the spring back decreased. In addition, it was found that the spring back decreased as the lower mold temperature increased.