• Proceedings of the Korea Information Processing Society Conference
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• 2004.11a
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• pp.349-352
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• 2004

성공적인 소프트웨어 프로젝트를 목표로 합리적인 계획을 수립하기 위하여 프로젝트의 전체 규모에 대한 신속하고 정확한 견적이 중요해지고 있다. IFPUG의 FPA 견적방식은 이미 검증되어 널리 사용되고 있으나, 복잡성과 모호성으로 인하여 실제 SI 업체의 견적 수행에는 어려움이 있으며 견적작업의 고비용을 초래하고 있다. 본 논문은 기존 FPA 방식의 문제점을 지적하고 이를 개선한 PFP 모델을 제시함으로써 기존보다 쉽고 효과적이며 효율적인 기능점수 견적을 가능하게 하였다.

• Applied Biological Chemistry
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• v.40 no.5
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• pp.395-399
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• 1997

Lintnerization properties and yield of enzyme-resistant starch in maize starches with different amylose content were investigated. Hydrolytic patterns of starches showed two distinct stages. With decreasing the amylose content, hydrolysis extents of starch increased. X-ray diffraction patterns of Amloca, PFP and commercial maize starch were the A crystalline type, and those of Amaizo 5 and Amylomaize VII were the B crystalline type. As acid hydrolysis time increased, the relative crystallinity of starches increased. After heating-cooling treatment was repeated up to 4 times, the yield of RS increased with increasing the amylose content. The yields of RS in lintnerzed maize starches decreased with acid treatment.

• Smart Structures and Systems
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• v.32 no.3
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• pp.135-151
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• 2023

Using 3D asphalt pavement surface data, a deep and multiscale network named CrackNet-M is proposed in this paper for pixel-level crack detection for improvements in both accuracy and robustness. The CrackNet-M consists of four function-specific architectural modules: a central branch net (CBN), a crack map enhancement (CME) module, three pooling feature pyramids (PFP), and an output layer. The CBN maintains crack boundaries using no pooling reductions throughout all convolutional layers. The CME applies a pooling layer to enhance potential thin cracks for better continuity, consuming no data loss and attenuation when working jointly with CBN. The PFP modules implement direct down-sampling and pyramidal up-sampling with multiscale contexts specifically for the detection of thick cracks and exclusion of non-crack patterns. Finally, the output layer is optimized with a skip layer supervision technique proposed to further improve the network performance. Compared with traditional supervisions, the skip layer supervision brings about not only significant performance gains with respect to both accuracy and robustness but a faster convergence rate. CrackNet-M was trained on a total of 2,500 pixel-wise annotated 3D pavement images and finely scaled with another 200 images with full considerations on accuracy and efficiency. CrackNet-M can potentially achieve crack detection in real-time with a processing speed of 40 ms/image. The experimental results on 500 testing images demonstrate that CrackNet-M can effectively detect both thick and thin cracks from various pavement surfaces with a high level of Precision (94.28%), Recall (93.89%), and F-measure (94.04%). In addition, the proposed CrackNet-M compares favorably to other well-developed networks with respect to the detection of thin cracks as well as the removal of shoulder drop-offs.

• Korean Journal of Plant Tissue Culture
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• v.28 no.1
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• pp.7-13
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• 2001

Calli were induced from diploid and haploid tobacco after 4 weeks and maintained on MS medium with combination of 2.0 mg/L 2,4-D,0.1 mg/L BAP and 2.0 mg/L kinetin. Suspension cells were screened through 65 $\mu$m-nylon mesh and 100 $\mu$m-mesh, then they were smeared on selection medium combined with cadmium and PFP by using the low melting agarose of 0.8%. After 30days smeared cultures of the medium the cell was treated with 500 $\mu$M and 1000 $\mu$M to select the resistant cell line were selected. Plant regeneration was induced from the selected cell lines on medium with 0.5, 1.5, 2.0 mg/L BAP and on media with combination of auxin and BAP under 500 $\mu$M and 1000 $\mu$M cadmium. At this time, plant regeneration was achived on cadmium free medium. In case of haploid, occurred from the cell line which is selected in medium with cadmium and PFP. In case of diploid regeneration occurred is in the medium with cadmium alone. The plantlet regenerated from cadmium resistant calli grew well in cadmium 500 $\mu$M. Protein pattern of leaf, root, stem of regenerated plants was analyzed. The quantum was 6.5188 ug/mg.fr.wt in the leaf of plant, 5.3611 ug/mg.fr.wt in the stem, 3.0213 ug/mg.fr.wt in the root. On the other hand, 5.9652 ug/mg.fr.wt. in the leaf of control, 3.5974 ug/mg.fr.wt in the stem of the control, 4.3766 ug/mg.fr.wt. in the root of the control. The one dimension bends regenerated from cadmium resistant calli resistant to cadmium in leaf were 49 involving 198.7KD etc. Disappeared were 4 involving 160.5KD etc, The protein bends were combinized were 3 involving 83.4KD etc. The bends resistant to cadmium stress in stem were 41 involving 4.3KD etc. Disappeared were 5 involving 114.8KD etc. The protein bends combinized were 6 involving 128.7KD etc. The bends which had the resistance to cadmium stress in root is 27 in volving 166,9KD etc. The bends which disappeared were 198.7KD etc. There were 5 involving 83.4KD etc.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.649-653
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• 2006

Engine Noise is composed of the mechanical and combustion noise. The contribution of combustion noise is generally bigger than the contribution of the mechanical noise at idle condition in DI diesel engine. That noise usually makes a roughness problem at the fundamental engine order. It is difficult to remove the modulation frequency so we have to directly reduce the combustion noise. The key effect of combustion noise reducing solution is the modification of the combustion pressure profile. It is accomplished by the multiple injection method and we solved the 400Hz combustion noise and improved the sound quality at idle condition in DI diesel engine.

• Journal of Information Display
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• v.10 no.1
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• pp.6-15
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• 2009

In this paper, a new approach is proposed for the efficient generation of computer-generated holograms (CGHs) using the spatially redundant data on a 3D object and the novel look-up table (N-LUT) method. First, the pre-calculated N-point principle fringe patterns (PFPs) were calculated using the 1-point PFP of the N-LUT. Second, spatially redundant data on a 3D object were extracted and re-grouped into the N-point redundancy map using the run-length encoding (RLE) method. Then CGH patterns were generated using the spatial redundancy map and the N-LUT method. Finally, the generated hologram patterns were reconstructed. In this approach, the object points that were involved in the calculation of the CGH patterns were dramatically reduced, due to which the computational speed was increased. Some experiments with a test 3D object were carried out and the results were compared with those of conventional methods.

• Environmental Engineering Research
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• v.7 no.2
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• pp.93-101
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• 2002

The seasonal patterns of dissolved organic matter (DOM) in Lake Kasumigaura, a shallow, eutrophic lake, and serveral DOM sources in its catchment area were investigated. DOM was fractionated using three resin adsorbents into classes: aquatic humic substances (AHS=humic acid+fulvic acid), hydrophobic neutrals (HoN), hydrophilic acids (HiA), bases (BaS) and hydrophilic neutrals (HiN). The DOM produced significantly different fraction distributions depending on the origin of sample. AHS and HiA prevailed over AHS in the lake while AHS and HiA existed at almost the same concentration levels in the rivers. AHS seems to be a more dominant component in rever water than lake water. The dominance of organic acids was also observed in the DOM sources: forest stream (FS), plowed field percolate (PFP), domestic sewage (DS) and sewage treatment plant effluent (STPE).

• Proceedings of the Computational Structural Engineering Institute Conference
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• 1993.04a
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• pp.109-116
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• 1993

구조물의 신뢰도를 평가하는 방법을 살펴보고 각각의 장,단점을 비교한다. 각 방법의 정확성을 평가하는 기준으로 Crude Monte Carlo(CMC)방법을 택하여, Importance Sampling(IS)방법, 그리고 Directional Sampling(DS)방법을 살펴 보고, 1차 근사방법은 현재 많이 사용되고 있는 Rackwitz-Fiessler(RF)방법, Chen과 Lind가 제안한 3-parameter방법(CL), Hohenbichler가 제안한 Rosenblatt 변환방법(RT)을, 그리고 2차 근사방법은 Breitung이 제안한 곡률적합 포물선 (Curvature Fitted Paraboloid,CFP)공식과 Kiureghian이 제안한 점적합 포물선(Point Fitted Paraboloid,PFP)공식, 그리고 Log-Likelihood function을 이용하여 원변수공간에서 파괴확률을 구하는 2차 근사공식(LLF)을 비교한다. 그리고 한계상태식이 불명확할 때 효율적으로 사용할 수 있는 반웅웅답법(Response surface method, RSM)을 살펴본다. 각 방법의 효율성 특히 적용 가능성을 예제를 통해 해석한 결과 추출법의 경우는 DS 방법이, 그리고 근사방법에서는 RSM 방법이 효율적임을 알 수 있었다.

• Proceedings of the Korean Biophysical Society Conference
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• 2002.06b
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• pp.56-56
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• 2002

Muscle contraction and relaxation are regulated by the sarcoplasmic reticulum (SR)-mediated $Ca^{2＋}$ release and $Ca^{2＋}$ uptake. The SR functions are closely related with the proteins residing in the SR such as ryanodine receptor, $Ca^{2＋}$-ATpase, calsequestrin, triadin and junctin. In an effort to further identify important functional SR proteins, experiments of sucrose-density gradient of SR fractionation, concanavalin A treatment, 2D gel electrophoresis, $^{45}$ Ca$^{2+}$ overlay, Strains-all staining, and peptide finger printing (PFP) were carried out.(omitted)d)

• Journal of the Korean Society of Safety
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• v.19 no.1
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• pp.102-107
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• 2004

Performance based design is a recent evolutionary step in the process of designing fire protection systems. In essence, it is a logical design process resulting in a solution that achieves a specified performance. Sometimes the prescriptive solutions presented in various codes and standards are too expensive or inflexible. Often the solutions do not and enables optimization of a solution for cost and function. In this study, performance based design was carried out to determine the extent of passive fire protection for oil terminal facilities. The results of performance based design were compared with those of prescriptive code based design. Performance based design is not always more economic than prescriptive code based design but provides more reliable and effective design that is fit for the purpose.