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.

슬라이더 관절을 갖는 로봇 액츄에이터 메커니즘 개발

이종신 한국기계기술학회 2010 한국기계기술학회지 Vol.12 No.2

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.

20~40대 직장여성의 피부 관리 실태에 관한 연구

이종신 한국메이크업디자인학회 2008 한국메이크업디자인학회지 Vol.4 No.3

大邱地域의 氣象狀態에 對한 考察

李鍾信,趙成弼,金潤玉,李鐘淑,崔榮愛,孫己周 曉星女子大學 藥學會 1970 曉星藥學會誌 Vol.- No.-

Salicylate가 척수 운동신경세포의 운동반사에 미치는 영향

이종신,한희철,홍승길 고려대학교 의과대학 1986 고려대 의대 잡지 Vol.23 No.1

Pain producing substances, such as bradykinin and potassium, were introduced into the skeletal muscle and the changes of impulse discharges from flexor gamma motoneurons of the spinal cord were studied whether they are influenced by ASA or not. The obtained results are summarized as follows: 1. When 5mg and 50mg of ASX were injected into the gastrocnemius-soleus muscle through the artery, resting impulse discharges from flexor gamma motoneurons diminished gradually and they were recovered after 30 minutes in case of 5mg ASA and after 1 hour in case of 30mg ASA. 2. After introducing 5mg of ASX, bradykinin was injected with intervals of 3 min. The frequency of impulse discharge from flexor gamma motoneuron was diminished. This was recovered to normal after 21 min. Also, ASA prolonged the latency of response induced by bradykinin. 3. After introducing 5mg of ASA, potassium was injected with 3 minute intervals. The frequency of impulse discharge from flexor gamma motoneuron was increased. This was recovered to normal after 30 min. Also, ASA increased the duration of increased impulse discharge induced by potassium but ASA prolonged the latency of reponse induced by potassium. 4. After introducing 5mg of ASA, potassium was injected in 3 minute intervals. The frequency of impulse discharge from extensor gamma motoneuron was inhibited. And this inhibition was greater than when ASA injected. The inhibition was recovered to normal after 30 min. Also, ASA prologed the latency of response induced by potassium. 5. After introducing 50mg of ASA intravenously, bradykinin was injected with intervals of 3 min. The frequency of impulse discharge from flexor gamma motoneuron was prolonged by this treatment. In case of potassium with same dose of ASA, it revealed that the frequency of impulse discharge, the duration and the latency of response were all increased. To summarize the above results, it seems that ASA has the prominent inhibiting effects on the pain induced by bradykinin, while it has no strong analgesic effect on the pain induced by potassium.

2축 직교좌표 로봇의 성능 향상을 위한 액츄에이터 설계에 관한 연구

이종신 한국기계기술학회 2010 한국기계기술학회지 Vol.12 No.4

수입침엽수(輸入針葉樹) 4수종(樹種)의 내후성(耐朽性) 및 CCA계(系) 목재방부제(木材防腐劑) 처리(處理)에 따른 방부효과(防腐效果)

이종신,김영식,한기선,Lee, Jong Shin,Kim, Young Sik,Han, Kie Sun 충남대학교 농업과학연구소 1995 Korean Journal of Agricultural Science Vol.22 No.1

With the aim to investigation of decay resistance and optimum concentration in chrome-copper-arsenic(CCA) preservative treatment on the imported softwoods from Siberia and North america, preservative absorption after CCA impregnation, weight losses and degradation patterns by decay fungi were examined. The density and latewood rate of Siberia softwoods(Spruce and Larch) were higher than those of North america softwoods(Douglas-fir and Western hemlock), resulting in the decrease of the CCA preservative absorption in the Siberia softwoods. In the case of untreated softwoods, decay resistance against Coriolus versicolor was lower than against Tyromyces palustris. For CCA treated softwoods, preservative effectiveness increased with increase in concentration of CCA solution. When treated with 0.7% CCA solution, efficiency value was more than 80 and 90 for C. versicolor and T. palustris, respectively. From this results, in the CCA preservative treatment for imported softwoods, it can be concluded that optimum concentration of CCA solution is approximately 0.7%. The absorption of CCA preservative distributed in the range of 3.8 and $5.5kg/m^3$. After exposure to testing fungi, in the untreated softwoods, bore holes formed in the cell walls and bordered pits, moreover, bordered pit canals enlarged by the fungi. However, 0.5% CCA treated softwoods was almost no deterioration in the cell walls and bordered pits due to decay.