요소수지와 토난접착제 혼용이 합판의 접착력에 미치는 영향

이필우,박헌 한국목재공학회 1984 목재공학 Vol.12 No.1

Taro-UF mixed type resin system was developed for gluing plywoods. The taro adhesive that was activated with sodium hydroxide was mixed with the definite ratios of UF resin adhesive. At the sametime, wheat-UF mixed type resin was also applied with the same method as Taro-UF mixed type resin. The mixing ratios of taro or wheat adhesive: UF resin were 0:100, 10:90, 20:80, 30:70, 40:60, 50:50, 60:40, 80:20, and 100:0 by weight. In addition, the UF resins extended with wheat powder at the extending ratios of wheat powder UF resin, 10:90, 20:80, 30:70, 40:60, and 50:50 by weight, were also used. The dry and wet shear strengths of the plywoods of 30:70 (taro adhesive : UF resin) mixing ratio were highest.. The dry shear strengths of the plywoods manufactured with the UF resin-mixing taro adhesive were higher than those of the plywoods with the UF resin-mixing wheat adhesive at 10:90, 20:80, 30:70, 40:60, 50:50, and 60:40 (taro or wheat adhesive : UF resin) mixing ratios. At all mixing ratios, the wet shear strengths of the plywoods manufactured with the UF resin-mixing taro adhesive were higher than those of the plywoods with the UF resin-mixing wheat adhesive. The dry and wet shear strengths of the plywoods manufactured with the UF resin-mixing wheat adhesive were higher than those of the plywoods with the wheat powder-extending UF resin at the mixing ratios, 10:90, 20:80, 30:70, and 40:60 (wheat adhesive or wheat powder : UF resin). So. it was found that the plywoods manufactured with the UF resin-mixing taro adhesive and the UF resin-mixing wheat adhesive had better shear strength than the plywoods with the wheat powder-extending UF resin. It was because the taro adhesive and wheat adhesive themselves took the bonding properties after being activated with alkali.

내화처리 (耐火處理) 파티클보오드의 내화도(耐火度)에 미치는 약제의 영향

이필우,권진헌 한국목재공학회 1983 목재공학 Vol.11 No.5

This research was performed to investigate the fire retarding properties of the particleboard formed with treated particles in the solutions of ammonium sulfate and Minalith, each of commercially important fire retardant chemicals. Laboratory test boards were made from particles treated by soaking in 5, 10, 15 and 20 percent concentration solutions of chemicals for 2 hrs. before resin was applied. According to the results, the Eire retarding effect of treated particleboard showed considerable difference compared with the untreated controlboard in weight lass, fingering flame time, burning paint, flame length and carbonized area. The boards treated with higher chemical concentrations indicated better results than lower. Minialith gave better results than chose obtained from the treatment of ammonium sulfate in weight loss, burning point, flame length and carbonized area, However no both chemicals gave significant difference in lingering flame time. Parallel and alternate veneer laminated products showed the same tendency as the untreated particleboard although they had a little difference.

NIEs 의 조세구조와 세제개혁 : 한국 , 대만 , 싱가폴 , 홍콩 Korea , Taiwan , Singapore and Hong Kong

이필우 한국재정학회 1993 재정논집 Vol.8 No.-

This paper addresses the differences and similarities in tax systems and structures and discusses tax reform issues in the '90s of NIEs. In the mini-states(Singapore and Hong-Kong), the tax system depends predominently on direct tax, whereas the maxi-states(S.Korea and Taiwan), for the most part, show a balanced structure between direct and indirect tax, though the structure is tilted in favor of indirect tax. This difference is probably due to several factors such as the difference in industrial structures, developmental and industrial policies, and trade policies. The ministates which rely on direct tax have less severe tax equity problem than the maxistates which rely on indirect tax. Hong-Kong which is free market oriented is said to be the most competitive in tax system among NIEs. For Hong-Kong's tax systemis based on rules of games whose cardinal principle is tax neutrality. The developmental policies of Singapore, Taiwan and S. Korea are characterized by governmental market intervention. This related to the fact that in these countries tax privileges for certain industrial sectors have become a distinct feature of the tax system. However, with the emergence of incipient patterns of democratization, the tax systems in S. Korea, Taiwan and even in Singapore are bound to be restructured. That is why fine-tuning tax will, for the most part, become irrelevant. However, fine-tuning remains relevant to hightech development. The changing internal and external environments such as environmental control, social overhead capital financing, financing of local autonomy and trade liberalization necessitate a restructuring of existing tax structures in NIEs.

내화처리연소목(耐火處理燃燒木)의 잔류 (殘留) 휨강도에 관한 연구

이필우 한국목재공학회 1984 목재공학 Vol.12 No.2

The 3 x 3 x 30 (㎤) sized lumbers of Populus alba-grandulosa L. were treated with four fire-retardant solutions of ammonium sulfate, monoammonium phosphate, diammonium phosphate and aluminium chloride for 1, 15, 30, and 60 minutes and 1, 3, and 7 days. Thereafter they were air-dried and burned at high temperature abour 1,800℃ and for short time of five minutes. This study estimated the relationship between absorbed chemical amounts and rate of weight loss or residual bending strength of these burned lumbers. The results were as follows: 1) In absorption amount of fire-retardant chemicals, diammonium phosphate showed the largest, aluminium chloride the smallest, but monoammonium phosphate and ammonium sulfate showed similar level. 2) The absorption amount of chemicals was decreased with the increase of specific gravity in the same species except aluminium chloride. 3) The rate of weight loss was decreased as the absorption amount of chemicals increased, especially monoammonium phosphate was most effective. 4) The MOR value of the residual bending strength was increased as the absorption amount of chemicals increased and especially monoammonium phosphate showed the most efficient effect. 5) Aluminium chloride showed more striking increase of MOR value of residual bending strength with the increase of absorption amount than any other chemical, therefore its MOR value was similar to the maximum MOR value of the most effective monoammonium phosphate. 6) The correlation between weight loss and MOR value of the residual bending strength was negative and aluminium chloride showed the most striking negative relation, but the others showed similar trends. 7) The correlation between work to proportional limit and absorption amount of chemicals was positive and the degree of increase in work to proportional limit was most in aluminium chloride, and the next, in monoammonium phosphate and diammonium phosphate in turn. 8) The correlation between work to maximum load and absorption amount of chemicals showed positive and diammoniurn phosphate revealed the best result and aluminium chloride showed better results than other two chemicals.

지방재정자립도의 제고방안 (2) 지역개발공고제도의 도입과 운영

이필우 대한지방행정공제회 1977 地方行政 Vol.26 No.286

N/A

태양인(太陽人) 해역병(解역病)과 영양결핍성(榮養缺乏性) 질환(疾患)의 상관성(相關性) 연구(硏究)

이필우,윤창열 대한한의학원전학회 2005 대한한의학원전학회지 Vol.18 No.4

국내외 비식별화 기술에 관한 검토 분석에 따른 개인건강의료정보 보호를 위한 국내 특화 비식별화 기술 제안에 관한 연구

이필우,인한진,김철중,여광수,송경택,유기근,백종일,김순석 사단법인 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.7

As life in a rapidly changing Internet age at home and abroad, large amounts of information are being used medical, financial, services, etc. Accordingly, especially hospitals, is an invasion of privacy caused by leakage and intrusion of personal information in the system in medical institutions, including clinics institutions. To protect the privacy & information protection of personal health medical information in medical institutions at home and abroad presented by national policies and de-identification processing technology standards in accordance with the legislation. By comparative analysis in existing domestic and foreign institutional privacy and de-identification technique, derive a advanced one of pseudonymization and anonymization techniques for destination data items that fell short in comparison to the domestic laws and regulations, etc. De-identification processing technology for personal health information is compared to a foreign country pharmaceutical situations. We propose a new de-identification techniques by reducing the risk of re-identification processing to enable the secondary use of domestic medical privacy. 국내외적으로 급변하는 인터넷 시대에 생활함에 따라 의료, 금융, 서비스 분야 등에서 대용량 정보가 이용된다. 이에 따라 병원, 기관 등 의료 기관에서의 시스템에서도 개인 정보의 유출 및 외부 침입으로 개인 정보 침해가 발생된다. 의료 기관의 개인건강의료정보의 정보보호 및 개인 프라이버시 보호를 위해 국내외 의료 기관에서는 국가별로 제시한 정책, 법령 기준에 따라 비식별화 처리 기술을 이용하고 있다. 기존 국내외 프라이버시 제도, 법령 등을 비교하여 국내에서 미흡했던 익명화와 가명화 기술 및 대상 데이터 항목에 대해 보다 발전되고 우수한 기술 및 대상을 도출하기 위해 비교 분석한다. 의료 개인정보에 대한 비식별화 처리 기술은 국외 기관인 미국 NIST 및 영국 ICO에서 제시한 국가정보보호를 위한 비식별화 기술에 비해 국내에서는 산학연의 각 기관 및 업체 등에서 자율적으로 비식별화 기술을 채용하고 있는 제약적인 상황이며 국내의 기술은 익명화 기술인 데이터 마스킹이나 삭제 기술의 수준이 되고 있는 실정이다. 국내 개인건강정보의 이용을 활성화하기 위해 재식별화 위험도를 줄인 비식별화 기술인 암호화와 확장성 퍼징 기술을 새롭게 제안하고자 한다.

한지 슬러시-목재 섬유 또는 목재 파티클 복합재의 인장강도

이필우,손정일,이영규 한국가구학회 1999 한국가구학회지 Vol.10 No.1

This research was carried out to investigate the Hanji sludge(black color)-wood fiber and wood particle composited applied by waste sludges arising from the making process of Hanji (Korea paper). In experimental design, four levels of the mixed ratio of Hanji sludge to wood fiber or wood particle(10:90, 20:80, 30:70 and 40:60), three kinds of the resin(PMDI, urea and phenol resin)and three kinds of the specific gravity(0.6, 0.75 and 0.9) were designed to determine the tensile strength of Hanji sludge-wood fiber and wood particle composites. From the results and discussion, it may be concluded as follows: In Hanji sludge-wood fiber and wood particle composites, tensile strengths showed decreasing tendency absolutely by increasing Hanji sludge additive, but clearly increase with the increase of specific gravity. In Hanji sludge-wood fiber composites, there were no differences between PMDI and urea resin-bonded composites, but phenol resin-boned composites were made possibly until the addition of 30% Hanji sludge. On the other hand, Hnji sludge-wood particle composites(SpGr=0.6) have very low tensile strength values. But they were made favorably until the addition of 20% Hanji sludge in Hanji sludge-wood particle composites(SpGr=0.9).

침대 매트리스 온풍기 발화 연구

이필우 한국화재감식학회 2016 한국화재감식학회 학회지 Vol.7 No.1

The setting of this study is to heat the mattress of beds in love motels that treat room-renting customers by attaching a fan heater and to keep the mattress warm like an ‘ondolbang’, a room with Korean floor heating system. When fan heaters are attached on the existing mattresses, heat will be created through electric heating element to forcefully circulate the internal air and keep the external temperature of mattress at 38˚C, causing the fire from fan heater of mattress. Considering the characteristics of room-renting, when the up and down motional shock of 120㎏ weight by two adults are consistently applied, the ignition factor and source of heat from operation of fan heater as well as the combustibles of mattress should be found through case of fire and reappearance experiments and alternatives and solutions will be sought and taken into measure.

학교 현장의 인권교육 실천 사례: 학생자치활동을 통한 갈등해결과 소통문화 만들기

이필우 한국법과인권교육학회 2010 한국법과인권교육학회 학술대회 Vol.2010 No.1