• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.460-460
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• 2000

Until now various model matching systems have been proposed for linear system, but very little has been done for nonlinear system In this paper, a design method of discrete time flight control system using nonlinear model matching is proposed. This method is based on Hirschorn's algorithm and facilitates easy determination of the control law using the relationship, between the output and the input, which is obtained by the time shift of the output. Also as a result, this method is the extension of the linear model matching control system proposed by Wolovich, in which the control law is obtained by left-multiplying the output by the interactor matrix. At the end of paper, the proposed control system is applied to CCV flight control system of an aircraft and the feasibility of the proposed approach is shown by the numerical simulations.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권8호
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• pp.3216-3230
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• 2015

A hot-issued research topic in the workflow intelligence arena is the emerging topic of "workflow-supported organizational social networks." These specialized social networks have been proposed to primarily represent the process-driven work-sharing and work-collaborating relationships among the workflow-performers fulfilling a series of workflow-related operations in a workflow-supported organization. We can discover those organizational social networks, and visualize its analysis results as organizational knowledge. In this paper, we are particularly interested in how to visualize the degrees of closeness centralities among workflow-performers by proposing a graphical representation schema based on the Graph Markup Language, which is named to ccWSSN-GraphML. Additionally, we expatiate on the functional expansion of the closeness centralization formulas so as for the visualization framework to handle a group of workflow procedures (or a workflow package) with organizational workflow-performers.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.269-270
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• 2006

내용 기반 영상검색을 위한 효과적 특징 추출 방법에 대한 관심이 집중되고 있다. 본 논문에서는 물체의 크기에 강인한 영상검색을 위한 색상 특징정보와 상관관계를 이용한 RGB 칼라 검색 기법을 제안하였다. R, G, B 영상을 각 칼라 R, G, B 크기 순으로 배열한 후 칼라 R, G, B 간의 분산 차이를 특징 벡터로 사용하였다. 그리고 각 계산된 분산차를 3개의 구역으로 표본화여 재배열하였다. 제안된 알고리즘은 실험을 통하여 기존의 칼라 히스토그램, CCV, 칼라 코렐로그램 보다 검색 성능이 더 향상됨을 보였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.1397-1403
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• 2008

Soil compaction works are essential to construction of dams, breakwaters and roads in order to avoid unexpected settlement/deformation of superstructures. Taking advantage of oscillating accelerometer, this research was made to complement existing methods for assessment of soil stiffness. In order to examine the validity of compaction-degree suggested in the study, tests on vibration characteristics using accelerometers was also performed. Test results for sand and gravel mixtures and Korean standard sands were compared and evaluated by conventional assessment methods under varying conditions as of input frequency, size of loading plate and relative density.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.82.1-82.1
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• 2010

Recently, Molten carbonate fuel cells(MCFCs) have been developing to get a good durability and economic feasibility for commercialization. To achieve these objectives, the cost of nickel based electrodes should be reduced. Regular anode thickness used in MCFCs is normally 0.7mm. Thus, in our study, the purpose was to reduce anode thickness up to 0.3 mm keeping MCFC performance on standard levels. In-situ sintering has been used, with 2 different fabrication methods (method A and B) and 2 different supports (support 1 and 2). Voltage losses at different temperature (600,620,640,$650^{\circ}C$) and after 1000 hours showed the higher performance that can be obtained using method B and support 2. After single cell test, an open-circuit voltage(OCV) of 1.075 V and a closed-circuit voltage(CCV) of 0.829V were obtained, at current density of $150mV/cm^2$. Also the voltage loss ratio at different cell temperature was lower in the case of method B and support 2. According to these results, the cost of anode fabrication can be reduced in the future, contributing for the economical feasibility of MCFCs.

• 열처리공학회지
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• 제21권2호
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• pp.87-93
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• 2008

A variety of minor alloying elements such as Zr, Sr, Y, and Gd were added to Mg-3%Zn-0.5%Sn base alloy to form various fine precipitates and their effects on the microstructure, tensile properties, and sheet metal formability were investigated. Various very fine precipitates along with fine second phases were observed by the additions. It was found that Zr or Gd additive has a role to suppress the grain coarsening of alloy sheets during the hot working process. The Zr-added alloy showed the highest tensile elongation at $250^{\circ}C$ whereas the Gd-added alloy exhibited the best sheet metal forming characteristics in terms of CCV (conical cup value) and spring-back tendency.

• 한국도서관정보학회지
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• 제30권1호
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• pp.243-255
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• 1999

다양한 종류의 기록물 중 전자매체를 제외한 고유한 형태의 문서 자료를 보존하는 데 있어 중요한 요인이 되는 생산된 종이 재질에 포함된 PH 함유량, 온${\cdot}$습도를 위시한 서고내 보존 환경을 소개하며, 실제 소장중인 문서가 폐손되었을 때 적용하는 래미네이팅 문서 수선법 등을 소개하여 낙후된 국내 기록보존 분야에 대한 단초를 제공하여 기록물 관련 유관 기관들이 기록물의 정보 제공 및 박물관 역할을 함께하는 문화 유산의 보고로 자리 매김을 하게 하는 것이다.

• Journal of Biosystems Engineering
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• 제39권3호
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• pp.174-183
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• 2014

Purpose: A robust, efficient auto-grading computer vision system for meat carcasses is in high demand by researchers all over the world. In this paper, we discuss our study, in which we developed a system to speed up line processing and provide reliable results for pork grading, comparing the results of our algorithms with visual human subjectivity measurements. Methods: We differentiated fat and lean using an entropic correlation algorithm. We also developed a self-designed robust segmentation algorithm that successfully segmented several porkcut samples; this algorithm can help to eliminate the current issues associated with autothresholding. Results: In this study, we carefully considered the key step of autoextracting lean tissue. We introduced a self-proposed scheme and implemented it in over 200 pork-cut samples. The accuracy and computation time were acceptable, showing excellent potential for use in online commercial systems. Conclusions: This paper summarizes the main results reported in recent application studies, which include modifying and smoothing the lean area of pork-cut sections of commercial fresh pork by human experts for an auto-grading process. The developed algorithms were implemented in a prototype mobile processing unit, which can be implemented at the pork processing site.

• 한국지하수토양환경학회지:지하수토양환경
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• 제19권3호
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• pp.134-141
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• 2014

A testing inspection is one of the important in the industry, owing to determine the reliability and directivity of testing inspection results. Therefore, the quality assurance and quality control (QA/QC) work which performed by personnel not directly in the inventory compilation development, in testing inspection must be thoroughly considered. Some agencies for environmental test inspection, they sometimes misunderstood that the QA/QC was ended with proficiency testing performance and on-site assessment by a director. Thus, results were often calculated without QA/QC work by self manual when conducting test. The objective of this study was to improve reliability of testing and inspection agency through the QA/QC case study which basically performed to raising reliability of testing and inspection agency. In this study, it increased reliability of result by verifying calibration curve (IC, ICV, CCV), blank, accuracy (LCS, MS) and precision as QA/QC performance, while performing investigation of soil contamination in mining areas. This study suggests that reliability establishing method of test result and management method of analysis process, through the QA/QC instance of testing agency.

• 한국동물위생학회지
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• 제41권3호
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• pp.211-216
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• 2018

Heat stroke in a dog is a life-threatening syndrome characterized by a high body temperature over $41^{\circ}C$, by the central nervous system dysfunction, and by multiple organ dysfunction. A 11-month-old male American Pit Bull Terrier was presented to clarify the cause of death to diagnostic laboratory. This dog showed clinical signs such as high body temperature ($42^{\circ}C$), severe tachypnea, hematochezia, epistaxis and hemoptysis after transportation at hot summer time. At necropsy, there were hemorrhages in skin, serosa of stomach and small intestine, and also dark red fluid in lumen of intestine. Histopathologic examination revealed extensive hemorrhages in stomach, muscle, skin, and tongue. In microbiology, pathologic bacteria such as Pasteurella, Boedetella, Salmonella, Clostridium, and circulating virus in Korea such as CDV, CIV, CAV, CHV, CCV, CPIV were negative except CPV. There were many gross and microscopic lesions suggesting hest stroke while pathologic agents and related lesions were not detected. Therefore we diagnosed this case as heatstroke.