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이동헌,홍성언,박수홍,Yi Dong-Heon,Hong Sung-Eon,Park Soo-Hong 한국공간정보학회 2005 한국공간정보학회지 Vol.13 No.2
GIS 분야에서 다루는 공간 데이터는 대부분 2차원의 데이터이다. 현실 공간에 존재하는 3차원 객체의 2차원 정보만을 취하거나 혹은 2차원 공간으로 투영하는 등의 방법으로 데이터를 저장한다. 이러한 방법은 정보의 손실로 인한 데이터 활용범위가 축소되고, 현실 공간을 정확하게 반영하지 못하는 문제가 있다. 최근 3차원 공간 데이터를 저장, 관리 가능한 DBMS가 개발되고, 3차원 데이터에 대한 관심과 요구가 높아지고 있다. 하지만 이들은 단순히 3차원 공간의 데이터를 저장만 가능할 뿐 공간 데이터베이스 관리 시스템의 핵심이라 할 수 있는 공간 질의가 불가능하다. 또한 이에 대한 연구가 미흡한 실정이다. 본 연구에서는 3차원 공간 모델을 이용하여 공간 데이터베이스 표준에서 정의하고 있는 공간 관계 연산을 설계하였다. 공간 데이터 모델로는 OGC에서 제시한 GML3에서 정의하는 모델을 사용하였고, 공간 관계 연산에 대한 설계 도구로는 공간 관계를 연산하는데 가장 좋은 방법으로 알려진 Point-Set Topology 기반의 DE-9IM을 이용하였다. Most spatial data handled in GIS is two-dimensional. These two-dimensional data is established by selecting 2D aspects form 3D, or by projecting 3D onto 2D space. During this conversion, without user's intention, data are abstracted and omitted. This unwanted data loss causes disadvantages such as restrictingof the range of data application and describing inaccurate real world. Recently, three dimensional data is getting wide interests and demands. One of the examplesis Database Management System which can store and manage three dimensional spatial data. However, this DBMS does not support spatial query which is the essence of the database management system. So, various studies are needed in this field. This research designs spatial relationship that is defined in space database standard using the three-dimension space model. The spatial data model, which is used in this research, is the one defined in OGC for GMS3, and designing tool is DE-9IM based on Point-Set Topology blow as the best method for topological operation.
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이동헌,전우제,박수홍,Lee, Dong-Heon,Chun, Woo-Je,Park, Soo-Hong 한국공간정보학회 2005 한국공간정보시스템학회 논문지 Vol.7 No.3
최근 이동전화, PDA, 텔레매틱스 단말기 등과 같은 모바일 기기의 사용이 늘어나고 있다. 모바일 기기들에서 지원하는 서비스 중 큰 부분을 차지하는 것으로는 위치추적, 경로 탐색 등의 서비스가 있다. 이러한 서비스를 제공하기 위하여 모바일 환경에서의 공간데이터에 대한 사용이 증가하고 있다. 하지만 모바일 기기의 저장 공간이 늘어났음에도 불구하고 여전히 공간데이터에 대한 요구를 수용하기에는 한계가 따른다. 따라서 본 연구에서는 모바일 환경에서 사용되는 공간 데이터에 대한 손실 압축 기법을 제시하고, 실험을 통한 압축률, 데이터 손실 정도를 분석하고자 하였다. 이렇게 제시된 공간 데이터 압축 기법을 실제 데이터에 적용하여 실험해 보고 동일 데이터에 대하여 선행 연구에서 제시한 방법을 적용한 결과와 비교 분석을 통하여 제시된 압축 방법이 높은 위치 정확도를 요구하는 데이터에 적용하였을 때 더 나은 성능을 보이는 것을 제시할 수 있었다. Nowadays, using the mobile communication devices, such as a mobile phone, PDA, telematics device, and so forth, are increasing. The large parts of the services with these mobile devices are the position tracking and the route planning. For offering these services, it is increasing the use of the spatial data on the mobile environment. Although the storage of mobile device expands more than before, it still lacks the necessary storage on the spatial data. In this paper, lossy compression technique on the spatial data is suggested, and then it is analyzed the compression ratio and the amount of loss data by the test. Suggested compression technique on the spatial data at this paper is applied to the real-data, and others methods, suggested at the previous studies, is applied to same data. According as the results from both are compared and analyzed, compression technique suggested at this study shows better performance when the compression result is demanded the high position accuracy.
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이동헌 한국사회법학회 2015 社會法硏究 Vol.0 No.26
Especially, what influence it would have on workers of the company that applies for rehabilitation procedure in Debtor Rehabilitation and Bankruptcy Act (DRBA, hereunder), that is, ① succession of work relations, ② efficacy of collective agreements, ③ and termination of work relations First, both in our nation and Japan, it becomes an issue whether the trustees of companies under rehab procedure succeed to the status of the existing managers. In our nation, theories that trustees succeed to the previous managers' status are prevailing while in Japan, theories recognizing succession and those not recognizing it collide. It's considered appropriate that user's position of a company under rehab procedure and the manager's status should be given to rehab trustees as long as they exclusively possess the right to run corporate business and manage/dispose of corporate properties. Second, our nation and Japan define the legal nature of collective agreement as unexecuted bilateral contract, and the laws exclude the trustee's right to cancel collective agreements. Also, in case collective agreements made in normal managerial conditions hinder corporate rehabilitation, academic theories and judicial precedents both recognize the need for altering them against workers' advantages to meet corporate financial situations. Its basis is, allegedly, that in both countries, if users suggest alteration to collective agreements due to changes in corporate situations, representatives of labor union and workers accept it, and the newly-made collective agreement does not violate collective autonomy. Third, on termination of work relations, concerning requirements to lay off due to managerial reasons, there is difference between two nations. Korean Labor Standard Act stipulates(Clause 24) 4 requirements to lay off due to managerial reasons, that is, ① urgent managerial needs, ② efforts to avoid lay-off, ③ setting of reasonable, fair lay-off criteria and selecting those needing to be laid off, ④ and notifying the labor union, and faithful consultation with it 50 days before the lay-off (or with those representative of the majority of workers in case of there being no labor union composed of the majority of workers).
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Cutaneous Metastasis of Renal Cell Carcinoma Presenting as Multiple Nodules: A Case Report
이동헌,곽호은,박소윤,홍나랑,국형돈,안지영,박미연,정혜정 대한피부과학회 2024 대한피부과학회지 Vol.62 No.2
Renal cell carcinomas (RCC) account for 2.4% of all adult malignancies. RCC is known for its aggressive nature, with approximately one-third of patients presenting with metastasis at the time of diagnosis. Cutaneous metastasis is a rare presentation of this cancer. A 78-year-old male presented with numerous erythematous nodules of various sizes on the left flank, which he had had for a month. He had undergone a left partial nephrectomy for papillary RCC 3 years previously and had been receiving chemotherapy since surgery. Histopathology revealed papillary architecture with prominent atypical nucleoli throughout the dermis. Immunohistochemical findings were positive for CD10, cytokeratin 7, PAX-8, vimentin, and alpha-methylacyl-CoA racemase. These results led to a diagnosis of cutaneous metastases of papillary renal cell carcinoma. Papillary RCC rarely presents with cutaneous metastases. Because these lesions are easily accessible, cutaneous lesions in patients with risk factors for RCC should be excised and pathologically evaluated.
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이동헌 한국채무자회생법학회 2012 회생법학 Vol.6 No.-
There has been a trend of increasing margin transactions in credit at most of the financial institutions in Korea. But the mortgage credit trading still accounts for a big portion. In particular, real estate is the first candidate for mortgage. Such kind of impersonal mortgage is favored in all kinds of transactions at financial institutions in that it's relatively expensive compared to other types of property and they get repaid prior to general creditors. Given that real estate is preferred as mortgage in credit trading and most credit bonds are collected via real estate auctions, it's only natural to focus on compulsory execution of real estate in discussing compulsory execution in general. Accordingly most of the efforts and researches to collect credit bonds evolve around execution of real estate and the resulting dividends, which makes it rather unnecessary to identify and explore other types of property for compulsory execution. But it's inevitable to accept the everlasting existence of default and the resulting accumulation of bad debt. Then does the ultimate answer to bad debt in credit trading lie in setting enough mortgage to prevent any happenings of bad debt? In this study the overall contents of returning amount of national tax as floating collective bond were reviewed, and its benefits as property for compulsory execution were examined. Then its potential of guarantee for transfer as a pre-management means and of compulsory execution as a postmanagement means was considered. The goals were thus to contribute to expansion of property scope for compulsory execution and to discussion of related legal issues. The results will help add one more category of property for compulsory execution and the returning amount of national tax will become common objects of compulsory execution and guarantee for transfer. In the future more research efforts should be made to examine floating collective bonds whose kinds are expected to be limitless in the business and their possibility for compulsory execution.
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spen plus 공정 모사기를 활용한 CO<sub>2</sub>/steam 고온 공전해 공정 모사
이동헌,엄성현,정우현,정기진,이지은 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
CO<sub>2</sub>/스팀 고온 공전해 기술은 포집된 이산화탄소를 직접 이용하여 일산화탄소와 수소 기반의 합성 가스를 생산할 수 있는 기술로서, 전기에너지를 화학에너지 형태로 변환 및 저장하는 기술이다. CO<sub>2</sub>/스팀 고온 공전해 기술은 열역학적, 반응속도 론적으로 큰 장점을 가지나, 열 및 전기에너지 공급에 있어 비용적 문제와 이러한 에너지를 얻기 위해 이산화탄소를 재 배출시킬 수 있다는 문제점이 있다. 이와 같은 문제점을 극복하기 위해 폐열과 잉여 전력을 활용함으로써 환경오염 문제 해결에 기여할 뿐만 아니라 합성연료의 경제성과 생산성을 향상시킬 수 있는 시스템 개발을 지향하고 있다. 이와 같은 미활용에너지를 활용한 CO<sub>2</sub>/스팀 고온 공전해 시스템을 구축하기 위해 각 공정의 단위설비를 구성하여 공정 설계를 진행하였으며, Aspen plus 공정 모사기를 활용하여 공정의 전체적인 흐름 을 탐색하였다. 또한, Aspen plus의 스택 모사를 위해 Fortran 모델링을 활용하여 전기화학적 요소를 적용하였으며, 전체적인 공정에서 각 구성 설비들의 최적 운전 조건을 확인하였다.
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