3D 프린팅을 이용한 목가구 삼방연귀(三方燕口) 결구 부자재 개발 연구

김완규,조성환 커뮤니케이션디자인학회 2020 커뮤니케이션 디자인학연구 Vol.73 No.-

In wood furniture production, utilizing hardware plays a significant role in enhancing quality of design, and have a direct effect on productivity and convenience as well. Up to the present, although there are diverse hardware in furniture making, it is hard to find cases inside and outside of Korea using embedded square lumber hardware that fixes square lumbers from three ways by meeting them on one point at the corner with 45 degrees. Even though three-way miter joint technique has been continued as one of traditional furniture making method, this is hard to be generalized because this demands high level of skill as well as has limit in production. For these reasons, the researcher proposes corner joint hardware for wood furniture using 3d printing. For developing three way miter joint hardware, this study starts with researching a term of three-way miter that is generally mixed with several ways of meanings. Secondly, the author researches structure of three-way miter and case study of its application example between traditional and modern wood furniture. In detail, researcher analyze structural character in furniture connector focused on fixing example between square lumbers for utilizing 3d printing. As for prototyping, 3D printed fixing connector is combined with existing square lumber joint system to strengthen and make up pros and cons of each part has. In this phase, 3D modeling and 3D printing is used for mock-up, and before and after image of combining 3d printed hardware is suggested. In this study, three way miter joint hardware has embedded structure, which is invisible outside. This can expect ornamental effect caused by molding and groove process on wood furniture that may looks simple. More simplified production process than traditional one would elevate productivity and access to wood furniture design with natural grain, and also be useful for corner joint that consist of square lumber including shelves, storage cabinets and table as well.

Brown Rot of Apricot and Mume Caused by Phomopsis vexans

김완규,조원대,유창현,홍성기 한국식물병리학회 2003 Plant Pathology Journal Vol.19 No.5

Occurrence of Sclerotinia Rot in Cruciferous Crops Caused by Sclerotinia spp.

김완규,조원대 한국식물병리학회 2003 Plant Pathology Journal Vol.19 No.1

Cruciferous crops grown in greenhouses and fields in Korea were surveyed from 1995 to 2000. Sclerotinia rot most severely occurred up to 30% in cabbage. Incidence of the disease was as high as 20% at its maximum in Chinese cabbage and rape and 10% in radish, but as low as less than 1 or 2% in broccoli and kale. Symptoms of Sclerotinia rot commonly developed on leaves and stems of the crucifers, but rarely on rachises of broccoli. A total of 112 isolates of Sclerotinia species was obtained from the diseased crucifers. Out of the isolates, 103 isolates were identified as S. sclerotiorum, and the rest as S. minor based on their morphological and cultural characteristics. S. sclerotiorum was isolated from all the crucifers, while S. minor was isolated from Chinese cabbage, broccoli, and kale. Six isolates of S. sclerotiorum and three isolates of S. minor were tested for their pathogenicity to the crucifers by artificial inoculation. All the isolates of the two Sclerotinia spp. induced rot symptoms on the plants of the crucifers tested, which were similar to those observed in the fields. The pathogenicity tests revealed that there was no significant difference in the susceptibility of the crucifers to the isolates of S. sclerotiorum. However, in case of S. minor, radish was relatively less susceptible to the pathogen.

Occurrence of Web Blight in Soybean Caused by Rhizoctonia solani AG-1(IA) in Korea

김완규,한성숙,Sung Kee Hong 한국식물병리학회 2005 Plant Pathology Journal Vol.21 No.4

Web blight symptoms were frequently observed on soybean plants grown in a farmer's fields located in Jincheon in Korea during a disease survey in August, 2005. Incidence of the disease was 5-20% infected plants in two of four soybean fields investigated. A total of 31 isolates of Rhizoctonia sp. were obtained from leaves, leaf petioles, and pods of diseased soybean plants. The isolates were identified as Rhizoctonia solani AG-1(IA) by anastomosis test and based on the morphological and cultural characteristics. Three isolates of R. solani AG-1(IA) were tested for pathogenicity to five cultivars of soybean by artificial inoculation. All the isolates induced blight symptoms on the leaves of soybean and formed sclerotia on the lesions, which were similar to those observed in the field. The pathogenicity tests revealed that all the soybean cultivars tested were susceptible to the pathogen. There was no difference in the pathogenicity among the isolates. The present study first reveals that R. solani AG-1(IA) causes web blight of soybean in Korea.

In Vitro Antagonistic Effects of Bacilli Isolates against Four Soilborne PlantPathogenic Fungi

김완규,Hang Yeon Weon,이상엽 한국식물병리학회 2008 Plant Pathology Journal Vol.24 No.1

Twenty isolates of Bacillus spp. obtained from livestock manure composts and cotton-waste composts were tested for in vitro antagonistic effects against soilborne plant pathogenic fungi, Fusarium oxysporum, Phytophthora capsici, Rhizoctonia solani AG-4, and Sclerotinia sclerotiorum. Seven isolates of Bacillus spp. had antagonistic effects on mycelial growth of all the isolates of F. oxysporum tested. The bacterial isolate RM43 was the most effective to inhibit the mycelial growth of the fungal isolates. Twelve isolates of Bacillus spp. had antagonistic effects on mycelial growth of all the isolates of P. capsici tested. The bacterial isolates M34 and M47 were very effective to inhibit the mycelial growth of the fungal isolates. Thirteen isolates of Bacillus spp. had antagonistic effects on mycelial growth of all the isolates of R. solani AG-4 tested. The bacterial isolates M27 and M75 were very effective to inhibit the mycelial growth of the fungal isolates. Fourteen isolates of Bacillus sp. had antagonistic effects on mycelial growth of all the isolates of S. sclerotiorum tested. The bacterial isolates M49 and M75 were very effective to inhibit the mycelial growth of the fungal isolates. The antagonistic effects of most Bacillus spp. isolates against the isolates of the four fungi differed depending on the fungal species and the isolates of each fungus. The bacterial isolates M27 and M75 were the most effective to inhibit the mycelial growth of all four fungi.

Occurrence of Anthracnose on Peach Tree Caused by Colletotrichum Species

김완규,홍성기 한국식물병리학회 2008 Plant Pathology Journal Vol.24 No.1

Anthracnose symptoms were frequently observed on fruits of peach trees grown in Yeongi in Korea during disease survey in August from 2000 to 2005. The disease incidence was as high as 40% at its maximum in the orchards investigated. A total of 24 isolates of Colletotrichum species were obtained from the anthracnose symptoms, out of which 20 were identified as Colletotrichum gloeosporioides and the four remaining ones as C. acutatum based on their morphological and cultural characteristics. Two isolates of each C. gloeosporioides and C. acutatum caused anthracnose symptoms on the fruits by both wound and unwound inoculation, which were similar to those observed in the orchard. The symptoms appeared more rapidly by the wound inoculation than by the unwound inoculation. There was no difference in pathogenicity between the C. gloeosporioides and C. acutatum isolates tested. In Korea, only C. gloeosporioides has been recorded as the causal fungus of anthracnose of peach tree. This is the first report that C. acutatum also causes anthracnose of peach tree in Korea.

Occurrence of Sclerotinia Rot in Four Leguminous Crops Caused by Sclerotiniasclerotiorum

김완규,홍성기,이상엽 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.1

Four leguminous crops grown in greenhouses and fields in Korea were surveyed from 2000 through 2002. Sclerotinia rot most severely occurred up to 60% in Phaseolus vulgaris grown in greenhouses but occurred as low as 0-0.5% in that grown in fields. Incidence of the disease in Pisum sativum grown in greenhouses ranged 1-5%, and that in Vicia fava and Vigna sinensis grown in fields was 0.8% and 2%, respectively. Symptoms of Sclerotinia rot commonly developed on stems and pods of the crops. A total of 59 isolates of Sclerotinia species were obtained from diseased stems and pods of the crops. All of the isolates were identified as Sclerotinia sclerotiorum based on their morphological characteristics. Eight isolates of the fungus were tested for their pathogenicity to four host crops by artificial inoculation. All of the isolates induced rot symptoms on stems of the host crops tested, which were similar to those observed in the fields. The pathogenicity tests revealed that there was no significant difference in the susceptibility to the isolates among the leguminous crops tested. This is the first formal report that S. sclerotiorum causes the Sclerotinia rot of the four leguminous crops in Korea.

Detection of Alternaria spp. in Carrot Seeds and Effect of the Fungi on SeedGermination and Seedling Growth of Carrot

김완규,Suaresh Behari Mathur 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.1

Five seed samples of carrot were tested to detect Alternaria spp. by blotter method. A. alternata and A. radicina were detected from all the seed samples as high as 25.8-70.5% and 37.5-63.5%, respectively. A. dauci was detected from four seed samples as low as 0.5-7.5%. The three Alternaria spp. were detected from the pericarp and the seed coat and endosperm of the carrot seeds but not from the embryo by component plating test. A. alternata and A. radicina were much more detected from the pericarp than the seed coat and endosperm. A. dauci was detected from the pericarp and the seed coat and endosperm at similar rate. The seed sample which was most severely infected with A. radicina showed the lowest rate of germination in the test on top of paper (TP). In the TP test, differences in total infection rate of A. radicina and A. dauci of the seed samples were very closely correlated with those in incidence of seedling rot on the seed samples. However, there was no correlation between infection rate of A. alternata and rate of germination or seedling rot of the seed samples. Soil test for seedling growth revealed that there was no correlation between differences in total infection rate of A. radicina and A. dauci and those in rate of normal seedlings of the seed samples.

Root Rot of Moth Orchid Caused by Fusarium spp.

김완규,이병대,조원대,WooSikKim 한국식물병리학회 2002 Plant Pathology Journal Vol.18 No.4

Moth orchid plants with yellowing blight and root rot symptoms were collected, and a total of 54 isolates of Fusarium spp. was obtained from roots and leaf bases of the diseased plants. The isolates were identified based on their morphological characteristics. Out of the 54 isolates of Fusarium spp., 42 isolates were identified as F. solani, 5 isolates as F. oxysporum, and 7 as F. proliferatum. Isolates of the three Fusarium spp. were tested for pathogenicity to moth orchid plants by artificial inoculation. All the Fusarium spp. induced root rot of the host plants. The symptoms progressed up to the basal part of the leaves, which later caused yellowing blight. The symptoms induced on the plants by artificial inoculation with the Fusarium spp. isolates were similar to those observed in greenhouses. The present study reveals that F. oxysporum, F. proliferatum, and F. solani cause root rot of moth orchid, and that F. solani is the main pathogen of the disease.

선박 설계 엔지니어링 지원 시스템을 위한 프레임워크의 설계

김완규,박민길,한명기,Kim, Wan Kyoo,Park, Min Gil,Han, Myeong Ki 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.10

The present study investigates a standardized framework for support system of ship design engineering. The purpose of this research is to improve the efficiency of information gathering and its use in tasks of the ship design engineering support system. Due to their variety and complexity, the existing engineering methods tend to waste time in searching for the standardized method and knowledge or to cause errors on tasks. Generally, these kinds of system have serious problems. The most serious one among them is that the existing system consists of both useful and useless data. This finally leads engineers to a failure in finding out useful information from the system. We have designed a standardized framework, which enables users to properly recompose the menu form depending on the task process, simplifies the methods at several process levels, and provides a more intuitive method in user interface environment in order to resolve the existing problems, minimize the system-operating costs, and improve the efficiency of engineering tasks.