• Journal of The Korean Society of Grassland and Forage Science
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• v.15 no.1
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• pp.61-66
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• 1995

This experiment was conducted to evaluate the effect of the various stage of growth on dry matter yield and chmical composition of forage oat(Avena sativa. L.). Seeds were planted on March 13 1993 on the Livestock Experimental Farm Keiymung junior college at keongsan Keongsangbukdo. Oat plant were harvested at various stages of maturity while the oat was in the premature stages. 1. Whole plant dry matter increased with advancing maturity. It was 11.8, 12.3, 14.9, 25.6 and 28.8% at before flag leaf emerged, flag leaf emerged, heads emerged, milk and dough stage., respectively. Dry matter increased very little during from before flag leaf emerged to heads emerged, after which it increased rapidly until the plant was dough stage. 2. Leaf weight ratio decreased with advancing maturity from before flag leaf emerged to dough, varied fmm 58 to 1 1%. Grain(with lemma, palea) increased with advancing maturity from heads emerged to dough, varied from 7 to 43%. 3. The content of cmde protein decreased during the stages of growth until milk(P<.OS), and then changed very little with advancing maturity. 4. The content of NDF and ADF increased rapidly during the early growth period until heading(P<.05) and then decreased due to the increase in carbohydrate storage in the grain. 5. The dry matter yields per ha increased with advancing maturity, it was 2,420, 4,380, 7,190, 13,130 and 14,530kg at before flag leaf emerged, flag leaf emerged, heads emerged, milk and early dough, respectively. Significant difference has been obtained among stages of growth(P< .05). 6. According to the results obtained from this study, it is suggested that milk stage of maturity is higher in dry matter yields would be recomendable for spring oat for silage.

• Journal of the Korean Professional Engineers Association
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• v.29 no.2
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• pp.8-14
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• 1996

• Journal of Periodontal and Implant Science
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• v.46 no.4
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• pp.219-219
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• 2016

• The monthly packaging world
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• s.296
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• pp.52-56
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• 2017

• Archives of Plastic Surgery
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• v.50 no.2
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• pp.141-141
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• 2023

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.34 no.2
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• pp.62-62
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• 2023

• Journal of Ecology and Environment
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• v.47 no.4
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• pp.261-263
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• 2023

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.150-153
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• 2002

The use of the finite element method for biomechanical analysis is increasing rapidly in recent years. Since biomechanical models are usually in very complex shapes, it takes a lot of time and efforts to build reasonable finite element models. In this paper, a new tetrahedral meshing algorithm from the series of 2-D computed tomography(CT) images has been proposed. In this scheme, the planar sections of three-dimensional objects and the side surfaces between two planar sections are triangulated first, and then an advancing front algorithm is employed to construct tetrahedral elements by using basic operators. A sample finite element model for thoracic vertebra is presented.

• Journal of the Korean Institute of Navigation
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• v.19 no.3
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• pp.1-10
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• 1995

The effect of the submerged high speed vessel on the ocean wave is made clear in the point of hydrodynamics view. In connection to the design of high speed ship, the flow analysis is carried out to predict the pressure distribution for drag and lift. The purpose of the research is to help the preliminary design of the economic hull form advancing under the ocean wave by estimating the resistance performance and the wave behaviour. In the present study, more efficient numerical approaches are investigated for the viscous flow analysis around a submerged NACA0012 hydrofoil with the laminar and incompressible fluid. Through the numerical simulation, it is found that the new numerical method becomes more efficient primarily due to the fact that the wave elevation is reasonably developed.

• Korean Journal of Computational Design and Engineering
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• v.11 no.2
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• pp.107-114
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• 2006

A new quadrilateral mesh generation technique from an existing triangle mesh is proposed in this paper. The proposed method is based on advancing front method and zero-thickness layer. Beginning with an initial triangular mesh, boundary triangular elements are removed and quadrilateral elements with zero thickness are generated. A quality of quadrilateral elements is improved during a mesh smoothing process. Until all initial triangular elements are removed, this procedure is repeated. Sample meshes are constructed to demonstrate the mesh generation capability of proposed algorithm.