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데이터마이닝을 이용한 공군 무기정비병의 조기 숙달을 위한 배속방안 연구
강규영,윤봉규,Kang, Kew-Young,Yoon, Bong-Kyoo 한국국방경영분석학회 2011 한국국방경영분석학회지 Vol.37 No.1
Recently, the military service period has been shortened continuously. Meanwhile, more skilled airmen are needed as the complexity of weapon systems increase. This phenomenon could lead to a disastrous result such as deteriorating the level of the readiness and the fighting power. We suggest a method to improve recruit's maintenance capability rapidly by assigning airmen to jobs appropriate to their characteristics using Datamining methods (K-menas and CART). We focus on the assigning method for air force's air-munition maintenance airmen since they are requested more skilled than other airmen. Grouping airmen with k-means method and devising classification rule with CART algorithm, we found that airmen's proficiency arrival period could be shortened by 1.79 months when they are assigned in the suggested way.
백색부후균 Phanerochaete chrysosporium에 의한 제지용 목재 칩의 리그닌 분해거동
강규영,조병묵,오정수 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
환경친화적인 청정기술의 한 방법으로서 각종 환경부하의 원인이 되고 있는 펄프·제지산업에서의 바이오테크놀러지(biotechnology)의 응용은 북미 및 EU 선진국에서는 이미 수년 전부터 꾸준한 연구가 진행되고 있으며, 일부의 기술은 공정화 단계를 거쳐 실제 현장에 적용되고 있는 시점이다. 펄프·제지산업에서의 바이오테크놀러지 적용은 광범위한 응용이 가능하다. 그 중 제지용 목재 칩의 펄프화에 리그닌분해균을 이용하는 biopulping 기술의 원리는 리그닌을 선별적으로 분해하는 미생물을 펄프화 전처리 공정에 투입, 목질계 세포벽을 구성하는 고분자 복합물질인 리그닌을 선택적으로 생분해하여 목재 칩을 1차로 연화, 미생물에 의한 미세섬유화(micro-fibrillation)를 유도하는 것이다. 백색부후균(리그닌분해균)의 생물학적 작용은 세포벽 내에 침착되어 있는 리그닌의 구조 변화 및 저분자화를 유도함으로써 목재 세포벽의 팽윤 및 연화를 야기할 수 있다. 본 연구에서는 리그닌의 선택적 분해 특성을 지닌 백색부후균 중 지금까지 그 분해효과가 가장 크다고 보고된 Phanerochaete chrysosporium을 제지용 목재 칩에 전처리 하여 전처리 기간별 목재내 조성분의 함량 및 구조의 변화를 살펴보았으며, 또한 전자현미경 관찰을 통하여 목질계 세포벽의 구조 변화 및 미세섬유화를 관찰하여 백색부후균의 리그닌 분해거동을 구명하고자 하였다.
백색부후균 전처리에 의한 목재 칩의 Biopulping
강규영,김형진,양봉숙,조병묵,오정수 동국대학교 생명자원과학대학 연습림 2000 연습림논문집 Vol.- No.6
Pulping process is to mainly obtain lignocellulosic fibers for papermaking from wood resources. Three types of pulping method have been basically employed, such as chemical pulping, mechanical pulping, and their combination methods. Biopulping technique has been mainly applied in mechanical pulping by pretreatment of white-rot fungi into the ultrastructure of wood cell wall. The main purpose of biopulping is to improve the pulp qualities, paper properties, and to reduce the energy costs and environmental impact, compared to traditional pulping systems. Nowadays, biopulping is frequently tried in chemical pulping operation for environmental concept, fiber modification, improvement of physical properties of paper and economic savings. The pretreatment of white-rot fungi prior to chemical pulping could affect the swelling and softening of wood cell walls by the behaviors of modification and depolymerization of ligin compounds. This study was carried out to investigate the effectiveness of biological treatment to wood chips by white-rot fungus and its structural change of lignocellulosic fiber via kraft pulping. A rotary bioreactor was applied for pretreatment of biological action. The treatment of white-rot fungus was shown in weight loss of chips. After bio-kraft pulping, kappa number and total yield of pulps were measured, and reduced. Freeness(CSF) values were also decreased. Whereas brightness values were increased, compared to untreated control. The physical strength of handsheets was shown a slight increase in tensile, tear, burst, and folding endurance, with bio-treatments.
木材 變色菌 및 表面汚染菌類에 對한 Streptomyces rimosus 代謝物質의 抗菌 效力
姜奎榮,金思翼,吳正壽 동국대학교 산업기술환경대학원 1994 산업기술논총 Vol.2 No.-
The objectives of this study were to evaluate the efficacy of metabolites produced by Streptomyces rimosus in protecting wood against wood staining and mold fungi. The following representative wood staining and mold fungi were selected for evaluate the antifungal activities of metabolites from Streptomyces rimosus : staining fungi - Ceratocystis pilifera, Ceratocystis piceae, Aureobasidium pullulans ; mold fungi - Trichoderma hazianum, Trichoderma viride, Penicillium citrinum, Aspergillus niger. The effect of medium concentration on development of antifungal metabolites from Streptomyces rimosus was examined in plate bioassay against spores of test fungi. The antifungal activity of these metabolites tested using plate bioassay. These results are summarized as follows ; 1. In the plate bioassay, the conidial germination of wood staining fungi was completely inhibited, leaving a clear zone around the paper disc treated with metabolites from Streptomyces rimosus. 2. The most effective antifungal activity showed in Aureobasidium pullulans. 3. The best result of different concentration of metabolites production medium was obtained with the ⅓×concentration in the largest clear-zone area around the paper disc. The next largest clear-zone area occurred with the ½×concentration.
Influence of Sulfuric Acid Impregnation on the Carbonization of Cellulose
강규영,김대영 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.10
It can present serious difficulties that cellulose, as source of carbon materials, has a low char yield in pyrolysis. In this study, we focused on the effect of using sulfuric acid as a dehydration agent, and examined the pyrolytic behavior of cellulose impregnated with sulfuric acid by thermogravimetry and scanning electron microscopy. The mass yield of carbon after 800 ℃ treatment in nitrogen increased by 2 - 5 times with the addition of small amounts of sulfuric acid. Sample shrinkage during carbonization was also significantly reduced. These effects are interpreted as being the result of facilitated extraction of water from cellulose accompanied by development of extended carbon networks.
강규영 한국어의미학회 2020 한국어 의미학 Vol.69 No.-
This paper shows that there are three different uses of the Korean ending “-tani”; as an exclamative ending, as an echo question ending, and as a rhetorical question ending. These can be distinguished from one another in three ways. First, they are grammaticalized from different reported speech constructions. Second, different kinds of endings and particles can be used with each usage. Finally, unlike the exclamative or rhetorical question usage, as an echo question ending, it does not guarantee the factuality of the proposition—alternatively, the speaker of –tani echo questions requires more information about the prior utterance before they can judge whether the proposition is true or not. Furthermore, while -tani has been suggested as a mirative marker, it expresses different kinds of mirative meanings according to its type. The exclamative and rhetorical question uses express a range of mirative meanings, such as counterexpectation or new information. The echo question ending use, however, only expresses the speaker’s unprepared mind towards the prior utterance.