낙엽송 , 리기다소나무 간벌재의 1 , 2 및 3 면 조재이용 시험에 관한 연구

정두진,이춘택,강대헌,이용대,조재명 한국목재공학회 1985 목재공학 Vol.13 No.3

In near future about 500,000 hectares of Japanese larch and pitch pine need thinning to improve crop-tree spacing and reasonable species composition in Korea. Although thinned trees show very little high quality wood, in fact, all the sawed products are suitable for construction and farming materials. Studies on the utilization of thinned small-diameter trees have been implemented in order to increase lumber yield and display the skeleton of farm buildings. The results obtained in this study were summarized as follows: 1. According to Korean Conifers Log Grading System, log grade 3 was 87.4 percent in Japanese larch bolts and 95.8 percent in pitch pine bolts from thinned trees. The ability to identify defects was essential for grading lags. 2. Cutting diagrams of sawing were developed for 1-sided sawing, 2-sided sawing and 3-sided sawing by small end diameter class of bolt and cutting sizes also were found to use effectively lumber with wane. 3. Lumber recovery of Pitch pine was a little higher than that of Japanese larch. The maximum lumber yields of pitch pine by sawing patterns were 87.2 percent for 1-sided sawing, 80.8 percent for 2-sided sawing an 64.1 percent for 3-sided sawing, up yield compared with 5$.l percent for 4-sided sawing. The lumber yield of 1, 2 and 3-sided sawing significantly was higher value than that of 4-sided sawing. 4. Lumber was inspected and graded. Lumber quality of diameter class 12㎝ was a little better than that of diameter class $em, but 90 percent of lumber in diameter class 16㎝ fell into grade 3. The lumber grade was classified by Korean standard grades of confiers lumber. 5. Lumber from 1, 2 and 3-sided sawing was used to build the skeleton of a farm house (53㎡) and greenhouse (60㎡) in order to display more efficient use of small diameter trees from thinning. 6. Total volume of timber for building a farm house was 8.1 ㎥ of imported timber. Timber of 7㎥, 70 percent of total volume would be substituted imported timber for domestic timber.

Power IC에 있어서 IGBT의 설계 및 제작 Parameter에 따른 특성의 최적화 방안을 위한 모델링 연구

정두진,윤상호,이현석,성만영,이철진 대한전자공학회 1998 대한전자공학회 학술대회 Vol.1998 No.1

화제의 책 : 도시:시골을 집어삼키는 리바이어던(Leviathan)

정두진 경북사학회 2014 복현사림 Vol.32 No.-

直接染料 染色布의 樹脂加工에 대한 影響

鄭斗鎭,薛貞華,崔錫哲 한국의류학회 1985 한국의류학회지 Vol.9 No.2

In this study, when cotton fabrics dyed with Direct dyes are treated under various resin concentration 2,4,8,12,14% with ureaformaldehyde(UF) and melamineformaldehyde(MF) resin which can be imparted the crease recovery to textiles, chang of properties on lightfastness. washfastness, crease recovery, breaking strength, etc. and color changes are investigated. the results are as follows 1) Color difference(ΔE) increased but K/S value decreased according to the increase of resin conc. such tendency showed that MF treated fabrics and soaping fabrics were evident than OF treated fabrics and non-soaping fabrics. 2) In lightfastness, ΔE and K/S value of resin treated fabrics were reduced as compared with untreated fabrics according to the increase ofresin cone. The lower ΔE and K/S value of MF than ΔE and K/S value of OF showed low lightfastness of MF. pH of resin treted fabrics was almost unaffected with lightfastness. 3) In washfastness, ΔE and K/S value of resin treated fabrics decreased slightly as compared with untreated fabricsaccording tothe increase of resin cone. The ΔE and K/S value of MF decreased lower than UF. But in the case of the higher resin cone. than about 8%, they were not almost differentiated. 4) As resin cone. increased, crease recovery considerably increased but breaking strength and elongation decreased. The fabrics treated with OF were good crease recovery, whereas the fabrics treated with MF were good breaking strength. 5) Soaping appeared to improve the lightfastness, washfastness, crease recovery but appeared to work adverse effect on breaking strength.

分散性染料의 染色性에 關한 硏究 : 第三報 精製分散染料의 擴散系數의 濃度依存性 Ⅲ Dependence of Diffusion Coefficient on Concentratinon of Purified Disperse Dyes

鄭斗鎭 慶北工業專門大學 1974 論文集 Vol.11 No.-

The study was carried out to elucidate the dependence of diffusion coefficient on penetrant concentration of disperse dyes(ethylene terephthalate (PET). Puritied disperse dyes(4-nitro-4'amino aze benzene, 4-nitro-4'-oxy azobenzene, 2,4dinitro dipheeylamine, 1-amino-4-oxy anthraquinone) was used and diffusion Coefficient was calculated by Matano's equiation. The dependence of diffusion coefficient on penetrant concentration was clearly observed, and it is represented by the equiation (4) D=?? (4) where k is constant. It was presumed that the dependence of diffusion coefficient on penetrant concentration was caused by the swelling of amorphous region. With increasing partition coeffieient, as a result of this study, the deerease of diffusion coeffieient was observed.

새로운 人工汚染布의 제작과 그 세척성에 관한 연구

정두진,김미형 한국의류학회 1989 한국의류학회지 Vol.13 No.3

New process for the preparation of the artificially soild cloth (ASC) used for detergency evaluation was developed and its detergency was also studied. ASC was prepared by the dipping of cotton cloth in the water in which oily soil, protein (gelatine), carbon black and clay had been dispersed. The clay used for this ASC was red yellowish soil around Mt. Kumjung and was a typical soil in Pusan area. Adhesive status of soil at prepared ASc was examined by an electron microscope, and crystallyzation and color change of used clay were evaluated with the determination of X-ray diffraction and surface reflectance. For the evaluation of detergency by the washing with commercial and model detergents, the behavior of soil removal from this ASC comparing with naturally soiled collar cloth was examined. Those results are summerized as followings; 1) Adhesive ststus of soil at prepared ASc was very similar to that of naturally soiled collar cloth. 2) A crystalline of clay calcined at 800℃ was disappeared in part and color of calcined clay changed into reddish yellow by the decomposition of organic matters. 3) More uniform ASc was prepared with clay calcined at 800℃ that 200℃ however its detergency prepared from clay calcined at 800℃ was poor. 4) A significant relationship between the content of inorganic matter in ASc and K/S value was found, however no significant result between the content of protein contaminated and K/S value was observed. 5) Detergency of prepared ASc had a very similar to that of naturally soiled collar cloh.

分散染料의 染色性에 關한 硏究 : 第2報 모델染料의 擴散係數의 濃度依存性 Ⅱ Concentration Dependence of Diffusion Coefficient of Model Dyes

鄭斗鎭 慶北工業專門大學 1972 論文集 Vol.9 No.-

The diffusion of p-nitroaniline into P.E.T. and Nylon 6 have been studied by film cylinderical roll method, and obtained the diffusion coefficient and adsorption isotherms. Investigated, in order to confirm the change of amorphous region of polymer substance with concentration dyed, stress relaxation modulus, infrared absorption spectrum, X-ray small angel diffraction and dichroism by micro spectrophtometer. The following is the result of the above experiment. (1) The diffusion coefficient in P.E.T. remarkably depends on concentration, but not in Nylon 6. (2) It is presumed that the concentration dependence of diffusion coefficient in P.E.T. is due to being plasticized of amorphous region of polymer substance. (3) It is hard to reach provable result in the change of polymer substance except stress relaxation modulus, it is therfore presumed that the change of amorphous region is rather qualitative change than quantitative change. (4) The adsorption isotherms in P.E.T. shows Langmuir type in low concentration region and constant partition type in high concentration and it shows constant partition type in Nylon 6.

Polyacrylonitrile織維의 染色性에 關한 硏究 : Malachite Green의 擴散 Diffusion of Malachite Green

鄭斗鎭 慶北工業專門大學 1975 論文集 Vol.12 No.-

The diffusion of Malachite Green(C,I, Basic Green 4) in ployacrylontrile(PAN) from an infinite dybath at PH 4.2, in a temperature range from 70 to 98℃ was investigated by cylindrical film roll method. The concentration profile of Malachite Green in PAN was found to be non Fickian and tho diffusion coefficient was concentration dependent. The diffusion coefficient calculated from the diffusion profiles (using Matano's method and the surface concentration of Malachite Green) suddenly increased from about 80℃ with increase of temperature. The concentration dependence of diffusion coefficient was well described by the use of chemical potential gradient model as a driving force of diffusion. The diffusion coefficient of this system above 80℃ which corresponds to glass transition temperature of PAN obeyed the WLF equiation (here T? was regarded as reference temperature).

로지스틱스 고객서비스를 위한 Supply Chain Management 활용방안

鄭斗鎭,白基彦 대구산업정보대학 1998 논문집 Vol.12 No.1

The purpose of this study is to analyze the logistics customer service having both cost factor and profit factor and to improve its service which leads to customer satisfaction by utilizing SCM(Supply Chain Management) which is Logistics Pipeline. SCM is a growing concept in current logistics literature. It is an approach aimed at cooperatively managing and controlling distribution channel relationships for the benefit of all parties involved, to maximize efficient use of resources in achieving the supply chain's customer service goals. Chapter Ⅱ provides relationship between the logistics and SCM. chapter Ⅲ determines the optimal customer service level through SCM. Chapter Ⅳ describes theoretical background of SCM. Chapter Ⅴ and Ⅵ shows, suitability and inappropriateness of SCM upon Logistics environment and supply chain integration. The last chapter Ⅶ discusses my findings.

안성시 복합교육문화센터 건립공사 기술제안 설계사례

정두진,한승진 대한설비공학회 2016 설비저널 Vol.45 No.4