파라핀 왁스 처리 목재의 치수안정성

이종신,김진경,이종신,박순,손기혁,윤선미 한국가구학회 2022 한국가구학회지 Vol.33 No.1

As a result of comparing the dimensional stability and water droplet contact angle of paraffin wax-treated wood with the conventional treatment technique, the heat replacement method, and the new technique, the pressure-vacuum method, the following conclusions were obtained. When treated with paraffin wax, radiata pine shows superior Reduction in water absorptivity (RWA) and Moisture excluding efficiency (MEE) compared to hard maple. The effect of paraffin wax treatment on Anti-swelling efficiency (ASE) and Anti-shrinkage efficiency (ASE), which are the criteria for dimensional stability evaluation, is higher in hard maple than in radiata pine. In the paraffin wax treatment, the pressure-vacuum method can obtain higher dimensional stability compared to the heat replacement method. A large droplet contact angle was formed on the surface of the pressure-vacuum wax treated wood. A relatively smooth wax layer was formed on the surface of the pressure-vacuum treated wood compared to the heat-replacement treated wood.

파라핀 왁스 처리 목재의 조직 내 왁스 분포 상태

이종신,이종신,김진경,박순,손기혁,윤선미 한국가구학회 2021 한국가구학회지 Vol.32 No.4

After paraffin wax treatment with different wood species and treatment methods, the differences in the weight percent gain density and wax distribution of treated wood were investigated, and the following conclusions were obtained. Paraffin wax penetrates low-density wood better than high-density wood, and thus the weight and density of treated wood are greatly increased. The lumen of the cells of the wood treated with the heat replacement method in which the water in the wood is replaced with paraffin wax is filled with wax, which greatly affects the weight and density increase of the treated wood. After pressure treatment with paraffin wax, the decompressed wood leaves no wax in the cell lumen. It shows a thin coating pattern only on the cell lumen wall. Accordingly, the increase in weight and density is small compared to heat replacement treated wood.

목재 난연제의 농도와 전기전도도의 관계

이종신,이종신,황원중,윤새민,김진경 한국가구학회 2020 한국가구학회지 Vol.31 No.4

The relationship between the concentration of wood flame retardant and electrical conductivity, and the effects of wood extract and water types on electrical conductivity were investigated. As the concentration of the flame retardant solution increased, the electrical conductivity increased, showing a positive correlation, and a high degree of significance was recognized. It was found that the cold water extract of wood did not significantly affect the electrical conductivity of the wood flame retardant solution, but an additional review is needed considering the field environment of the wood flame retardant treatment industry. When ground water is used to prepare flame retardant solution, the electrical conductivity of the solution increases more than twice as compared to tap water, but there is a positive correlation between the concentration and the electrical conductivity, showing high significance.

신뢰도 향상과 활용성 제고를 위한 도로명주소기본도의 오류 및 정확도 분석

이종신,김정현,김민규,윤희천 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.2

Due to the conversion from the existing address system to road name address system, the versatility of the road name address from the public and private sectors is increasing gradually. Therefor, the reliability of the road name address basic map, of the default data is also an urgent need, this means the accuracy of the data. But, road name address basic map is production time due to the use of different map accuracy is to fall, so is also the situation insufficient of utilization. This study Construction of identify each attempt by the road name address basic map and analysis the location accuracy of road name address basic map. As a result, the RMSE of cadastral survey results showed that appears lower than the RMSE of digital map survey results. The judgment can be utilized as the basis for the proposed improvements for the road name address basic map. 기존 지번방식의 주소체계로부터 도로명주소체계로의 변환으로 인해 공공 및 민간분야에서 도로명주소의 활용성이 점차 증가하고 있다. 따라서 도로명주소기본도 데이터의 신뢰성이 절실히 요구되며 이는 데이터의 정확도를 뜻한다. 그러나 도로명주소기본도는 작성당시 서로 다른 도면의 사용으로 인해 정확도가 떨어지므로 활용성 또한 미비한 실정이다. 이에 본 연구에서는 각 시도별 도로명주소기본도의 구축현황을 파악하고, 도로명주소기본도의 위치정확도 오류를 분석하였다. 그 결과 지적현황측량 성과의 RMSE가 수치지형도측량 성과의 RMSE보다 낮게 나타난 것을 알 수 있었으며 향후 도로명주소기본도에 대한 개선방안 제시의 기초자료로 활용될 수 있을 것으로 판단된다.

표고 재배 중 톱밥 배지의 물리적 성질과 목재 화학성분 변화

이종신,강석구,양승민,김진경 한국균학회 2022 韓國菌學會誌 Vol.50 No.4

In this study, the physical properties of the medium and changes in the wood chemical composition of the sawdust were investigated during the cultivation of oak mushroom sawdust bags, and the following results were obtained. After inoculation, the weight of the medium decreased during the incubation period. It is determined that this is not due to evaporation of moisture containing the medium or decomposition of sawdust, but to decomposition of rice bran, a low molecular substance added to the medium. It was confirmed that the moisture content of the medium was steadily increased during incubation, and it was estimated that the organic substrates such as rice brane in the medium was decomposed by mycelium, and water, one of the decomposition products of organic substrates, caused an increase in the moisture content of the medium. Along with the increase in the harvest of oak mushrooms, the proportion of organic substances such as holocellulose and lignin, the main components of the wood cell wall of sawdust, steadily decreased. In particular, the degradation characteristics of the wood cell wall component of shiitake, which is a white rot fungi, were confirmed by higher lignin reduction rate than that of holocellulose. On the other hand, ash, which is an inorganic material, increased with an increase in the number of mushroom harvests. The increase in the amount of ash in the medium may have been due to the decrease in the organic matter content such as holocellulose and lignin.

동남아시아 최대 호수인 톤레사프호 주변 가뭄피해 분석

이종신,엄대용 사단법인 인문사회과학기술융합학회 2017 예술인문사회융합멀티미디어논문지 Vol.7 No.5

현재 전세계는 이상기후로 인해 다양한 종류의 자연재해를 경험하고 있다. 2016년 2월부터 5월까지 동남아시아 전역에 발생한 가뭄 또한 이상기후의 한 가지 형태라고 볼 수 있다. 이 가뭄으로 캄보디아를 비롯한 태국, 베트남, 라오스, 미얀마 등 5개 국가들은 수출을 위한 쌀 수확량뿐만 아니라, 식량난, 식수난에 직면하게 되었다. 이에 본 연구에서는 가뭄으로 인한 피해를 정량적으로 분석하기 위해 동남아시아 최대 호수인 톤레사프호 주변을 대상으로 원격탐사기법을 적용하였다. 그 결과, 토지피복 변화를 통해 2016년 2월에 수계(132.582km2)와 녹지(706.937km2)의 급격한 감소가 발생되었으며, 감소된 수계와 녹지는 마른 토지(752.488km2)와 나지(257.350km2)로 변화된 것을 알 수 있었다. 또한, 지표면 온도 변화를 통해 2016년 2월 이후 4월 까지 가뭄으로 인해 예년에 비해 6℃ ~ 8℃의 온도 상승이 발생된 것을 알 수 있었다. 이는 지속적인 가뭄으로 인해 4월에 호수의 기능이 저하된 것을 나타내는 것이라 할 수 있다. Today, the world is experiencing a variety of natural disasters due to the extreme weather. Drought that occurred throughout Southeast Asia from February to May 2016 is also a form of abnormal climate. As a result of this drought, five countries, including Cambodia, Thailand, Vietnam, Laos and Myanmar, faced food shortages, food shortages, as well as rice yields for export. In this study, remote sensing technique was applied to the vicinity of Tonlé Sap, the largest lake in Southeast Asia, to quantitatively analyze the damage caused by drought. As a result, the change of land cover caused a drastic decrease in the water system (132.582km2) and greenery (706.937km2) in February 2016, and the reduced water system and greenery changed to dry land and paddy field. It was also found that the temperature rise of 6℃ ~ 8 ℃ compared to the previous year due to the drought from February to April 2016 due to the change of the surface temperature. And it was found that the function of the lake was deteriorated in April due to continuous drought.

플루오르규산염 첨가 요소수지 접착제로 제조한 합판 및 파티클보드의 강도적 성질과 방부성능

이종신,이병기,노재성 한국폐기물자원순환학회 2001 한국폐기물자원순환학회지 Vol.18 No.5

2축 직교좌표 로봇의 성능 향상을 위한 액츄에이터 설계에 관한 연구

이종신 한국기계기술학회 2010 한국기계기술학회지 Vol.12 No.4

말단 장치의 평면 유지가 가능한 로봇 회전 암의 설계

이종신 한국로봇학회 2010 로봇학회 논문지 Vol.5 No.4

This study proposes the design method for the robot rotation arm which the end effector that is connected in end of the arm keeps parallel motion even though the robot arm rotates. So far, most robot arm rotates together the end effector when the arm rotates. For this, this study proposes the mechanism that the arm is linked to each 4 parallel link so that rotation is possible by 4 pins, and the rotation arm connects 2 joints of diagonal line direction to a link in each 4 joint for rotation, and designs so that can change length of the link. For verification of design, this study targeted that develop the rotation arm for medical examination that use in ophthalmology. It is important that a medical robot offers comport to patient and design compactly so that medical examination and treatment space may can be defined enough. It is designed so that all drive elements may be positioned on interior of the arm and optimization of design for main parts was carried out in this study for this. The robot arm which is developed in this study manufactured to use by medical phoropter arm, and got good result by an experiment. The robot rotation arm which is proposed in this study is judged to contribute very effectively in case use of a medical robot arm for medical examination and treatment, also the robot arm which the end effector that is connected in the end of the arm needs to keep parallel motion. And, the robot arm which is developed in this study made an application as license.

서울 보훈중앙병원 건립공사 기계설비 설계사례

이종신 대한설비공학회 2011 설비저널 Vol.40 No.12