• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.90-96
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• 2005

The existing safety-management manual is confined to list data based on regulations, and only provide ways to prevent accidents/incidents for particular work which accidents occur frequently. As it is difficult to understand the complete process involved the work, we can not expect the manual to function as a guide to prevent unfortunate events. When establishing WBS(work breakdown structure) of railway line engineering, consideration of the characteristics of train operation will enable many benefits. Therefore in this research it is conducted to materialize it in the manual. Main contents in this research are to review the way that change complete work performance process and person in charge of different tasks into WBS(work breakdown structure), and trough the newly developed WBS , the ways to improve roles and functions of the manual which Korean Railroad made are recommended.

• Journal of Chest Surgery
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• 제33권3호
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• pp.240-244
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• 2000

Background: Neuroblastoma is the third most common malignancy of chidhood, and is the most common mediastinal mass in children under the age of 2 years. However, the results of surgical treatment have been seldomly reported in Korea. Therefore, we analyzed the results of surgical treatment in children with neuroblastoma and its influencing factors. Material and Method: We studied the clinical characteristics and prognosis of 12 children, 11 makes and 1 female, whose primary thoracic neurobalstomas or ganglioneuroblastomas were diagnosed and operated between 1977 and 1997. Men age at presentation was 29.9 months. Result: Respiratory symptoms were the modes of performed in 9 patients. Complete excision, partial excision, and biopsy only were performed in 9, 2, and 1 patients respectively. Ten patients of thoractic neuroblastomas survived (83.3%) during follow-up period. Conclusion: The postoperatve 5-year survival of thoracic neuroblastoma was 76.4% and the prognosis was related to the stage of neuroblastoma. We suggest that complete resection should be considered as preferential method in the treatment of thoracic neuroblastoma in children, especially with early stage.

• Animal Systematics, Evolution and Diversity
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• 제15권1호
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• pp.51-65
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• 1999

털부채게의 제 1 조에아 유생에서 메갈로파 유생기까지, 실험실내 25$^{\circ}C$에서 와전 유생발생시키고 4기의 조에아 유생과 1기의 메갈로파 유생에 대해 상세히 기재하고 도시하였다. 털부채게의 조에아 유생은 제 1 촉각과 미절의 특징에 의해 Actaeinae아과의 다른 조에아 유생들과 구별할 수 있었다.

• 대한가정학회지
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• 제30권3호
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• pp.119-129
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• 1992

Black soybeans were gamma-irradiated at dost levels of 0, 2., 5, 10 and 20 kGy, and stored at room temperature for the experiments associated with cooking quality. The degree of cooking of soybeans in boiling water at 98-10$0^{\circ}C$ has been determined by measuring the maximum cutting force of cotyledon. The cutting force to reach a complete cooking was about 120~130g/g. Irradiation at 2.5~20kGy caused the reduction of cooking time in black soybeans by 30~60% compared to the nonirradiated control, and the cooking rate constant of the irradiated samples was higher than that fo the nonirradiated control sample. These results were similarly found in the stored samples for one year at room temperature after irradiation. Color characteristics of cooked samples showed no significant difference between the nonirradiated control and 5 kGy-irradiated sample. After complete cooking of black soybeans, there were not significant in the organoleptic qualities between the nonirradiated and irradiated samples.

• 약학회지
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• 제52권2호
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• pp.147-150
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• 2008

Previously, we reported on the antibiotic resistance patterns of 50 strains of Staphylococcus aureus which were isolated from a hospital in Busan, Korea from July 2005 to December 2006. We have isolated small plasmids and classified plasmid types by agarose gel electrophoresis. We have selected 5 plasmids and determined complete nucleotide sequences of those plasmids. The aim of this paper is to report on the characteristics of cadmium, erythromycin, lincomycin resistance plasmids and a cryptic plasmid based on the sequence analysis obtained by using the BLAST program.

• 한국자동차공학회논문집
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• 제11권4호
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• pp.226-231
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• 2003

There have been many attempts to make kart chassis domestically to lower the price of complete kart. However nobody made a successful chassis due to the lack of understanding the characteristics of kart chassis frame. In this work, a baseline chassis frame under the bending and torsional load is studied. Design target is that the baseline chassis frame is quite adequate not only for the beginners but also for the beginning racers. Results from the analysis are used as a guide to design or modify the baseline chassis with the goal of proper torsional stiffness. Minimum increase in weight is being forced. As a result, the baseline chassis frame was designed, made, and tested. Based on the design results, complete karts are being manufactured by the small 1 size domestic company and these karts are being sold and run in the market.

• 아시안잔디학회지
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• 제4권2호
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• pp.85-100
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• 1990

Turfgrass management had not been recognized as the subject to research until the social demand for turfgrass increased. This study was carried out to compare the effects of several complete fertilizers and ureaform(UF) with those of traditional fertilizers used for general agriculture. Complete fertilizers used in this study include Jandibiryo, Chojikwanri, Wonyebokbi and 18 - 18 - 18. Three exteriments were conducted in the established zoysiagrass field (over 5 years), in the recently established zoysiagrass field(1 years), and in the pots using artificially mixed media. In the established zoysiagrass, UF, Wonyebokbi, Chojikwanri and 18 - 18 - 18 resulted in higher growth rate, while Chojikkwanri and Jandibiryo showed better performance in the recently established zoysiagrass. Jandibiryo resulted in higher growth rate of zoysiagrass with the artificially mixed soil which is relatively infertile. Righer growth rates were maintained longer with UF, Jandidiryo, Chojikwanri than urea 18-18-18 and Wonyebokbi. Wonyebokbi had the characteristics of producing more stolons and rhyzomes than the other fertilizers.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 추계학술대회 논문집
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• pp.54-60
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• 1998

PSC box bridges by MSS construction method in high-speed railway may not be cast in place at one step. Web and bottom flange(U member) in the cross section are cast in place at first, then top flange will be cast in place later with some time lag. In this section, stress distributions of U member and top flange are different with those in generally complete cast in place cross section. In the composite section composed of two different aged members, the redistribution of stresses takes place. This results from time-dependent strain characteristics of concrete and the effects of forces applied at the various stages. For comparison in the present paper, two models, one with the composite cross section and the other with generally complete cast in place cross section, are analyzed. The longitudinal stress differences of two models on considering construction stages are compared. As the analysis results show the considerable differences in the stresses of cross section between two models, the composition of cross section is considered for rational design of PSC box girder bridge.

• Structural Engineering and Mechanics
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• 제84권4호
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• pp.453-464
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• 2022

Thin plates are the most common spatially stressed members in engineering structures that bear out-of-plane loads. Therefore, it is of great significance to study the deformation performance characteristics of thin plates for structural design. By constructing 12 basic displacement and deformation basis vectors of the four-node square thin plate element, a deformation decomposition method based on the complete orthogonal mechanical basis matrix is proposed in this paper. Based on the deformation decomposition method, the deformation properties of the thin plate can be quantitatively analyzed, and the areas dominated by each basic deformation can be visualized. In addition, the method can not only obtain more deformation information of the structure, but also identify macroscopic basic deformations, such as bending, shear and warping deformations. Finally, the deformation properties of the bidirectional thin plates with different sizes of central holes are analyzed, and the changing rules are obtained.

• 자원환경지질
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• 제54권4호
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• pp.465-473
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• 2021

본 연구에서는 수치모델링을 통해 단열의 교차각과 같은 기하학적 특징이 교차점에서의 유동특성과 용질의 혼합·분배에 미치는 영향을 연구하였다. Pe(Peclect number; 이류와 확산의 상대적인 비)뿐만이 아니라 단열의 교차각이 교차점에서의 용질의 혼합·분배모델을 결정하는데 있어 중요한 역할을 하는 것으로 나타났다. 교차각이 90°미만인 경우, 주입된 유동방향과 동일한 방향의 유출구로 진행하기 때문에 교차점에서 양쪽 주입구에서 온 유선들의 접촉을 용이하게 한다. 반면, 교차각이 90°보다 큰 경우 유체가 주입된 유동방향과 유출구의 방향이 반대이기 때문에, 교차점에 두 주입구에서 온 유선들 간의 접촉은 최소화 되었다. 그러므로 전자의 경우에서는 높은 Pe에서도 용질의 혼합이, 후자에서는 낮은 Pe에서도 유선경로에 따른 용질의 이동이 나타났다. 따라서 Pe < 1의 경우, 완전혼합모델이 지배적인 것으로 알려졌지만, 교차각이 150°인 경우 교차점에서 혼합뿐만이 아니라 일부는 유선의 경로를 따라 유출구로 유출되었다. 전반적으로 Pe가 0.1 - 100에서 완전혼합모델에서 유선경로모델로의 전이가 나타났지만, 이는 교차각에 따라 크게 달라진다. 교차각이 클수록(≧ 150°) Pe가 0.1 - 10에서, 교차각이 작을수록(≦ 30°) Pe가 10 - 100에서 전이가 발생하였다. Pe > 100에서는 교차각과 상관없이 유선경로모델이 더 지배적인 것으로 나타났다. Pe > 1,000에서는 교차각이 150°이상인 경우에만 100% 유선경로모델이 나타나며, 교차각이 150°미만인 경우 유선경로모델이 지배적이지만 여전히 교차점에서 용질의 혼합이 발생하였다.