配車間題의 發見的 解의 改善에 關한 硏究

宋省憲 弘益大學校 1985 弘大論叢 Vol.17 No.2

Various heuristic algorithms for the traveling salesman, and vehicle routing problems are classified by their peculiar criteria and their interrelations are discussed. An efficient refinement procedure is presented to improve any results by the existing heuristic algorithms which is not optimal.

單段階 分配管理 시스템에서 車輛運行費用을 고려한 分配센타의 立地選定問題

宋省憲 홍익대학교 경영연구소 1986 경영연구 Vol.10 No.-

표면개질된 폴리설폰 막에 대한 오일에멀젼의 수투과 플럭스

송근호,김강희,조성헌,이광래 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A

A hollow-fiber type polysulfone UF membrane was surface-coated with hydroxyethylmethacrylate (HEMA). The effect of various coating parameters on permeation flux, such as concentration ratio of AIBN/HEMA, solvent(water or methanol). and UV irradiation time, was investigated The water permeation flux of oil-emulsion increased with concentration ratio of AIBN/HEMA. and increased with UV irradiation time The flux of the membrane coated in solution using methanol as a solvent was greater than that of the membrane coated in solution using water as a solvent The flux of both the coated and the uncoated membrane declined with the operation The flux decline means that the membrane fouling by oil-emulsion occurs However, the fouling of the coated membrane was much less than that of the uncoated membrane

친수성으로 표면개질한 폴리설폰막의 투과플럭스

송근호,김강희,조성헌,이광래,임종호,배성수 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.1

실관막형 폴리설폰 막의 표면을 2-hydroxyethylmethacrylate(HEMA)로 코팅하였으며, 코팅인자들인 azobisisobutyronitrile(AIBN)/HEMA 성분비, 용매의 종류(물, 메탄올), UV 조사시간 등이 투과플럭스에 미치는 영향을 조사하였다. AIBN/HEMA/ 메탄온ㄹ 용액으로 코팅한 막이 AIBN/HEMA 성분비가 높고, UV 조사시간이 길수록 투과플럭스가 높았다. AIBN/HEMA 성분비가 낮으면 동일한 투과플럭스를 얻기 위하여 UV조사시간을 더 길게 하여야 하며, 특정한 AIBN/HEMA 성분비와 UV 조사시간에서 코팅한 막의 투과플럭스는 원래의 막(코팅하지 않은 막)보다 높게 나타났다. 또한, 오일에멀젼에 의한 fouling은 코팅한 막과 원래의 막에 모두 나타났지만, 코팅한 막의 fouling이 원래의 막 보다 현저히 낮았다. 즉, fouling 발생 후 코팅한 막의 수투과 플럭스(0.2683g/㎠ㆍmin)는 코팅하지 않은 막(0..448g/㎠ㆍmin)보다 약 6배 이상으로 높게 유지되었다. A hollow-fiber type polysulfone UF membrane was surface-coated with 2-hydroxyethylmethacrylate(HEMA). The effect of various coating paramters on permeation flux was investigated, such as concentration ratio of Azobisisobutyronitrile(AIBN)/HEMA, solvent (water or methanol), and UV irradiation time. The membrane coated with a solution of AIBN/HEMA/methanol showed about 2.65 times higher water flux than that coated with a solution of AIBN/HEMA/water. The membrane coated with a solution of higher AIBN/HEMA ratio and a longer UV irradiation time exhibited a higher permeation flux. The membrane coated with a solution of lower AIBN/HEMA ratio needed a longer UV irradiation time for coating to get a same level of permeation flux. In order to have a greater permeation flux than uncoated membrane, the membrane should be coated with a solution of a certain AIBN/HEMA ratio and UV irradiation time. The fouling by oil emulsion occurred to both of the coated and the uncoated membrane. However, the fouling of coated membrane was much less than uncoated one; the water flux(0.2683g/㎠·min)through the coated membrane was about 6 times higher than that(0.0558g/㎠·min) through the uncoated membrane.

신경외과 영역에서의 접착성 지혈제가 주변뇌조직에 미치는 영향에 대한 실험적 연구

장헌상,김관태,송시헌,김성호,김윤 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.10-11

In a series of 20 young rats, three cortical lesions were made in each hemisphere. Two of these lesions were filled with avitene and gelfoam, while the third was left empty as a control. The animals were killed successively on weeks 1, 2, 4 and 8 after the operation. The results were as follows : 1) Although there was no difference in the type of tissue reactions, avitene was more rapid and profound than gelfoam in the process and degree of inflammatory reaction at the same periods. 2) Avitene biodegradaded more rapidly than gelfoam. 3) The extent of fibrosis and adhesion to the surrounding brain tissues were not grossly different between these two agents but more profound histopathologically in avitene at the same periods. With these results, we could conclude that the avitene was superior to the gelfoam as the hemostatic agent in neurosurgical area.

유기질비료 시비량에 따른 오미자 묘목의 초기 생육특성에 관한 연구

이경아,박태호,박성용,김도현,오문국,김민수,안태진,이상원,김영국,안영섭,박충범,차선우,송범헌 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.1

This study was carried out to have basic and applied informations to find the optimum nitrogen fertilization level for organic cultivation and to investigate early growth characteristics of Schizandra chinensis Baillon. Different application levels of the organic fertilizer were based on the recommended rate of N fertilizer. Five different levels of the organic fertilizer were applied to S. chinensis and early growth responses such as the length of vine, the diameter of vine, the number of leaves, and the number of branches were investigated. Lengths of main and total vines were shown longer at the level of 1.0 time organic fertilizer than those at others. The vine length at early growth was the highest at the level of 1.0 time organic fertilizer among the treatments. Stem diameter was shown thicker level of 1.0 time organic fertilizer than others on August and September, whereas on October it was the thickest in the conventional cultivation. Number of leaf was increased higher at the level of 1.0 and 2.0 times organic fertilizer than that in the compared to conventional. The number of branches was appeared the lowest at the level of 1.0 time organic fertilizer at early growth, however they were increased through progressing their growth stages. They were not significantly difference among the treatments except for the level of 2.0 times organic fertilizer. Based on the research results, the growth of S. chinensis was commonly higher at the level of 1.0 time organic fertilizer compared to other treatments.

중증 미만성 뇌축색손상 환자의 MRI소견 및 임상적 고찰

김한겸,김성호,송시헌,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.1

The distribution and extent of traumatic lesions were evaluated with MRI in 31 patients with diffuse axonal injuries(DAI). Authors also analyzed patients with diffuse axonal injury, clinically. The patients with DAI showed statistically significant lower incidence of lucid interval, fracture of the skull and intracranial hematoma. Combined injuries, intracrnial hematomas and distribution of lisions were porved to be poor prognostic factors of DAI. Diffuse axonal injury is most commonly involved in the white matter of the frontal and temporal loves and the splenium of the corpus callosum. Patients with lisions in brainstem and cerebellum revealed worst prognoses. In our studies, the sensitivities of the imaging techniques for diffuse axonal injures were 7.3% with CT scan, 75.6% with T1WI, and with 97.6% in T2WI of MRI, respectively. The authors concluded that MRI has clear advantages over CT in evaluating diffuse axonal injuries.

생성적 적대 신경망을 활용한 부분 위변조 이미지 생성에 관한 연구

송성헌(Seong-Heon Song),최봉준(Bong-Jun Choi),문미경(M-Ikyeong Moon) 한국전자통신학회 2022 한국전자통신학회 논문지 Vol.17 No.2

생성적 적대 신경망(Generative Adversarial Networks, GAN)은 내부의 두 신경망(생성망, 판별망)이 상호 경쟁하면서 학습하는 네트워크이다. 생성자는 현실과 가까운 이미지를 만들고, 구분자는 생성자의 이미지를 더 잘 감별하도록 프로그래밍 되어있다. 이 기술은 전체 이미지 X를 다른 이미지 Y로 생성, 변환 및 복원하기 위해 다양하게 활용되고 있다. 본 논문에서는 원본 이미지에서 부분 이미지만 추출한 후, 이를 자연스럽게 다른 객체로 위변조할 수 있는 방법에 관해 기술한다. 먼저 원본 이미지에서 부분 이미지만 추출한 후, 기존에 학습시켜놓은 DCGAN 모델을 통해 새로운 이미지를 생성하고, 이를 전체적 스타일 전이(overall style transfer) 기술을 사용하여 원본 이미지의 질감과 크기에 어울리도록 리스타일링(re-styling) 한 후, 원본 이미지에 자연스럽게 결합하는 과정을 거친다. 본 연구를 통해 원본 이미지의 특정 부분에 사용자가 원하는 객체 이미지를 자연스럽게 추가/변형할 수 있음으로써 가짜 이미지 생성의 또 다른 활용 분야로 사용될 수 있을 것이다. A generative adversarial network (GAN) is a network in which two internal neural networks (generative network and discriminant network) learn while competing with each other. The generator creates an image close to reality, and the delimiter is programmed to better discriminate the image of the constructor. This technology is being used in various ways to create, transform, and restore the entire image X into another image Y. This paper describes a method that can be forged into another object naturally, after extracting only a partial image from the original image. First, a new image is created through the previously trained DCGAN model, after extracting only a partial image from the original image. The original image goes through a process of naturally combining with, after re-styling it to match the texture and size of the original image using the overall style transfer technique. Through this study, the user can naturally add/transform the desired object image to a specific part of the original image, so it can be used as another field of application for creating fake images.

AI를 활용한 마커리스 사물인식 연구

송성헌(Seong-Heon Song),송은지(Eun-Jee Song) 한국정보통신학회 2020 한국정보통신학회 종합학술대회 논문집 Vol.24 No.1

불 한 형용사 전산 DB 개발을 위한 기초연구 (I) - 불·한 기계번역을 위한 이개어 전자사전의 구축을 위하여 -

이성헌 ( Lee Seong-heon ),장재성 ( Chang Chae-seong ),홍재성 ( Hong Chai-song ) 한국프랑스어문교육학회 2004 프랑스어문교육 Vol.17 No.-

Le présent article se propose de faire le point sur les problématiques que l'on rencontre dans l'étude contrastive des adjectifs en français et en coréen afin de fournir un modèle de bases de données électroniques permettant de représenter les informations en question de façon tout à la fois systématique et efficace. Pour cela, nous commençons par mettre en évidence la différence typologique existant entre les adjectifs français et coréens. Nous montrons que les premiers se rapprochent des noms alors que les seconds se rapprochent des verbes (nouny adjective vs verby adjective). Ensuite, nous examinons les divers problèmes qui se posent lors de l'étude contrastive des adjectifs des deux langues, problèmes dus à leur différence typologique et concernant : l'orientation de l'étude contrastive, la description des expressions équivalentes en langue cible (en l'occurrence en coréen) et le traitement de la polysémie des adjectifs de la langue source (en l'occurrence en français). En ce qui concerne la première problématique, nous établissons la nécessité d'adopter une étude "non symétrique", c'est-à-dire unilatérale. Pour la deuxième, nous démontrons le besoin de décrire de manière exhaustive les expressions coréennes équivalant aux adjectifs français, même si elles ne relèvent pas de la catégorie adjectivale. Enfin, pour la troisième, nous traitons des différents facteurs à prendre en compte pour décrire la polysémie des adjectifs français et proposons d'utiliser les classes d'objets dans ce but. Pour finir, nous établissons les principes de base pour l'élaboration des bases de données électroniques et en présentons un modèle intégrant tous les principes précités et représentant toutes les informations nécessaires de façon systématique et formelle, en fournissant des exemples de description pour certaines rubriques.