• The Transactions of the Korea Information Processing Society
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• v.5 no.8
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• pp.2203-2212
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• 1998

본 논문에서는 정규화 과정을 통해 2차원 물체를 인식하는 방법을 제안하고자 한다. 이를 위해 우선 입력 영상에 톨이론을 적용하여 화상구조를 파악함으로써 임계치 선정없이 잡음 제거와 경계 추출을 행한다. 그 후 추출된 경계선에 Hough 변환을 이용하여 직선과 원을 추출하여 여기에 프리미티브의 안정성에 기초하여 물체를 이루는 프리미티브에 대한 분리를 행한다. 최종적으로 분리된 프리미티브들로부터 모양 정도를 계산하고 디지털화 과정을 통해 인식 과정을 수행한다. 끝으로 본 논문의 유용성을 실험에 의해 입증하고자 한다.

• Environmental Mutagens and Carcinogens
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• v.9 no.2
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• pp.63-72
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• 1989

본 연구는 N-methyl-N'-nitro-N-nitrosoguanidine(MNNG) 를 처리한 CHO-K1세포에서 DNA 복제억제와 그 회복과정의 분자론적 기작을 규명할 목적으로 방사선 이중표지에 의한 DNA합성율의 측정, 알카리 자당농도구배 초원심분리법에 의한 DNA 분자량과 후복제 회복율을 측정하여 다음과 같은 결과를 얻었다. DNA 합성율은 2nM 이하의 낮은 농도의 MNNG 처리군에서는 급격히 감소하였으나, 5nM 이상의 농도에서는 그 감소양상이 둔화되었다. 억제되었던 DNA 합성율은 시간경과에 따라 회복되어 처리 후 4시간 째에는 대조군 수준 또는 그 이상으로 회복되었다. MNNG 처리 후 DNA 분자 크기의 분포와 새로 합성된 DNA 분자의 생장양상을 알카리 자당농도구배 초원심분리법으로 조사한 결과 MNNG 처리 후 시간 경과에 따라 새로합성된 DNA 분자들의 크기분포는 1*107 달톤 이하의 DNA 분자들의 합성양이 특이하게 증가하였다가 감소함을 보였다.

• The Journal of the Acoustical Society of Korea
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• v.14 no.4
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• pp.46-63
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• 1995

This thesis described an unlimited vocabulary connected speech recognition system using Time Delay Neural Network(TDNN). The recognition unit is the diphone unit which includes the transition section of two phonemes, and the number of diphone unit is 329. The recognition processing of korean connected speech is composed by three part; the feature extraction section of the input speech signal, the diphone recognition processing and post-processing. In the feature extraction section, the extraction of diphone interval in input speech signal is carried and then the feature vectors of 16th filter-bank coefficients are calculated for each frame in the diphone interval. The diphone recognition processing is comprised by the three stage hierachical structure and is carried using 30 Time Delay Neural Networks. particularly, the structure of TDNN is changed so as to increase the recognition rate. The post-processing section, mis-recognized diphone strings are corrected using the probability of phoneme transition and the probability o phoneme confusion and then the eojeols (Korean word or phrase) are formed by combining the recognized diphones.

• Korean Journal of Environmental Agriculture
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• v.13 no.3
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• pp.386-395
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• 1994

As a basic research on applying the microbial strains which had been isolated and proved to remove heavy metals, such as Pb, Cd, Zn, and Cu in This laboratory to actual wastewater treatment, optimum condition of the treatment system with addition of single or multiple species of pollutants and microorganisms were investigated at small scale. Concentration of the bacterial inoculum was 3000mg/L and 1500mg/L of MLSS for treatment with single and multiple species, respectively. Removal rates of heavy metals were expressed at HRT’s (Hydraulic Retention Time) of 12, 24, and 48 hr. Removal rates of Pb, Cd, Zn, and Cu after 12 days at HRT of 24hr with addition of single and multiple species were 93%, 90%, 80%, and 39%, and 75%, 90%, 74%, and 48%, respectively. Judging from these results, treatment capability of the isolated strains is excellent. Hence, the microorganisms are expected to be applicable to actual wastewater treatment.

• Horticultural Science & Technology
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• v.32 no.2
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• pp.184-192
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• 2014

Various types of unit packaging methods were applied for 'Fuji' apples during short-term cold storage and export simulation. Gas tightness of the package was controlled stepwise in the successive two-year experiments using different perforation treatments (none, punch hole, or pinhole) and sealing methods (tie v s. heat seal). Risk of tight packaging and effectiveness of macroperforation on weight loss and quality maintenance were analyzed as related to changes in gas concentration inside the packages. Immediately after harvest, each 5 apple units were packaged in $40{\mu}m$ polypropylene (PP) film bags, stored 4 weeks at $0^{\circ}C$, and then put on the shelf for one week at ambient temperature in the preliminary experiment, In the main experiment, export process was imposed after storage simulating 2 week refrigerated container shipment at $0^{\circ}C$ plus one week local marketing at ambient temperature. Non-perforated film packaging with relatively high gas tightness induced flesh browning caused by carbon dioxide accumulation regardless of the sealing methods. Among perforated film packaging, in contrast, atmospheric modification was partly established only in the pinhole treatment and flesh browning symptom was not observed in all the treatments. Even the punch hole perforated film packaging without gas tightness effectively reduced the weight loss, whereas had slight benefits for quality maintenance. Reduced perforation using pinhole treatment seemed to improve sensory texture, while effects on physicochemical quality were insignificant. Overall results suggest the need of more minute perforation treatments on the packaging film to ensure modified atmosphere effects on quality maintenance.

• Proceedings of the Korea Association of Information Systems Conference
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• 1998.10a
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• pp.131-136
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• 1998

경영혁신 작업에 대한 연구는 대부분 기술적인 측면과 전략적인 측면이 강조되어 왔고 혁신적인 업무처리 과정에 효율적으로 적응하기 위한 기업의 환경에 대해서는 종종 무 시되어 왔다. 본 연구에서는 경영혁신 작업에 영향을 주고 있는 조직·관리적인 요인을 바탕 으로 기존 연구된 한국 및 미국의 핵심 성공요인을 비교 기술한다. 또한, 한국 및 미국기업 경영혁신 작업의 성과를 비교한다. 분석에 사용한 성과 요인들은 업무처리 시간의 단축, 업 무처리 비용의 감소, 직원들이 기술력이나 업무처리 능력의 향상, 양질의 생산처리, 직원들 삶의 질 향상, 고객 만족도 향상 및 요구변화에 대한 적응력 등이다. T-test를 이용하여 분 석한 결과, 모든 작업성과에 대해 미국기업이 한국 기업보다 높게 나타났다. 이러한 결과는 한국 기업의 경영혁신 과정은 불필요한 업무들을 과감히 폐기한 후 창의적인 업무처리 과정 의 재설계가 필요하다고 판단된다.

• Journal of Korean Association for Spatial Structures
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• v.12 no.2
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• pp.45-53
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• 2012

This paper derives Isogeometric analysis and post-processing method of surface that are generated by NURBS basis function for accurate geometric modeling and structure analysis of free-form. By deforming these parameters that are consisted of control points, knots, polynomial, variable geometric models are derived. The basis function that is used to Isogeometric analysis is same to the basis function of NURBS that is used to generate geometric models. For performing isogeometric analysis, h-p-k refinement is performed without changing of original geometry. To visualize the results of isogeometric analysis that control points' displacements, post-processing method that is the interface method between IGES format and Rhinoceros is derived.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.3
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• pp.449-457
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• 2017

In this paper, we analyze the security and performance of the Quantis Quantum random number generator in terms of cryptography through experiments. The Quantis' post-processing is designed to output full-entropy via bit-matrix-vector multiplication based on mathematical background, and we used the min-entropy estimating test of NIST SP 800-90B so as to verify whether the output is full-entropy. Quantis minimizes the effect on the random bit rate by using an optimization technique for bit-matrix-vector multiplication, and compared the performance to conditioning functions of NIST SP 800-90B by measuring the random bit rate. Also, we have distinguished what is in Quantis' post-processing to the standard model of NIST in USA and BSI in Germany, and in case of applying Quantis to cryptographic systems in accordance with the CMVP standard, it is recommended to use the output of Quantis as the seed of the approved DRBG.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.19 no.3
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• pp.291-300
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• 2001

In this paper, we developed a Satellite Image Processing System for obtaining 3-D positional information which is composed of five process modules. As a procedure of them, the Data Process module is the procedure that reads and processes the header file to generate data files. and then calculates orbital parameters and sensor attitudes for obtaining of 3-D positional information with them. The 3D Process module is to calculate 3-D positional information and the Dialog Process module is to correct the time of image frame center using the single image or stereo images for implementing the 3D Process module. We expect to obtain 3-D positional information with the header file and minimum GCPs(1∼2 points) using this system efficiently and economically in comparison with existing commercial software packages.

• Horticultural Science & Technology
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• v.29 no.3
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• pp.224-231
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• 2011

Effects of 1-methylcyclopropene (1-MCP) treatment and controlled atmosphere (CA) storage was analyzed for the export quality of 'Fuji' apples after 8-month storage. Apples were harvested from two orchards located in different regions at relatively late stage of maturity for long-term storage. Fruit were treated with 1 ${\mu}L{\cdot}L^{-1}$ 1-MCP and then stored in $0^{\circ}C$ air or CA with 1.5 kPa $O_2$ and < 1.0 kPa $CO_2$ for 8 months. To simulate poststorage export process such as 2-week refrigerated container shipment plus 7-day local distribution, fruit were put in $0^{\circ}C$ air storage for additional two weeks and then on the shelf for 7 days at $20^{\circ}C$. Both the 1-MCP treatment and CA storage reduced respiration and ethylene evolution after storage and shipping simulation, and successfully maintained titratable acidity and flesh firmness even after the export process. In 'Fuji' apples harvested after adequate stage of maturity for long-term storage, however, 1-MCP treatment alone seemed not to be satisfactory for the maintenance of sensorial fruit texture for export market. CA storage or 1-MCP treatment/CA storage combination program should be applied for lately harvested 'Fuji' apples exported after eight months storage.