• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.2
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• pp.318-328
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• 2014

In this paper, as a way of performance improvement of business card recognition in the mobile environment, we suggested a hybrid OCR agent which combines data using a parallel processing sequence between various algorithms and different kinds of business card recognition engines which have learning data. We also suggested an Image Processing Method on mobile cameras which adapts to the changes of the lighting, exposing axis and the backgrounds of the cards which occur depending on the photographic conditions. In case a hybrid OCR agent is composed by the method suggested above, the average recognition rate of Korean business cards has improved from 90.69% to 95.5% compared to the cases where a single engine is used. By using the Image Processing Method, the image capacity has decreased to the average of 50%, and the recognition has improved from 83% to 92.48% showing 9.4% improvement.

• The KIPS Transactions:PartC
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• v.8C no.6
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• pp.855-864
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• 2001

With the increasing importance and complexity of EC (Electronic Commerce) across the Internet, the need and expectation for intelligent software agents to support both consumers and suppliers through the whole process of EC are growing rapidly. To realize the intelligent EC. a multiagent based EC system. which includes foundational technologies such as the establishment of standard product ontology the definition of message and negotiation protocol and brockering, is required. In this paper we propose an intelligent EC System named ICOMA(Intelligent electronic CO mmerce system based on Multi-Agent) as an open infrastructure of multiagent-based EC. Concretely we have proposed. designed and implemented an architecture of multiagent-based EC system including 6-types of agents message protocol for inter-agent negotiation, personalized produst retrieval and filtering., We have confirmed the effectiveness of the system through experiments.

• Journal of the Korean Institute of Gas
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• v.18 no.5
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• pp.26-32
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• 2014

CCS(Carbon Capture and Storage) which is technic to capture and storage the carbon-dioxide is the method that reduces the carbon-dioxide from the industries to prevent earth from the global warming. In order to apply to the practical site, it is inevitable to investigate the possibility of damage in the pipe or components by carbon-dioxide. In this paper, the immersion test is performed to estimate the suitability of the rubber which is used to seal or connect the pipelines because the rubber has not been validated. Also, the immersion test is carried out in a certain condition(pre- and supercritical state).

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.1
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• pp.81-90
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• 2012

The indentation test, which is one of the testing methods for evaluating the mechanical properties of materials, can be applied to the evaluation of creep properties. Many studies related to the indentation creep test, however, have just focused on the characteristics of the steady-state creep, so there are wide discrepancies between the uniaxial test and the indentation test. To obtain accurate creep properties, it is therefore important to consider the effects of transient creep. In the present work, the Ogbonna et al.'s work on the spherical indentation test including the transient creep was expanded and applied to the conical indentation creep test. The characteristics of the transient creep were analyzed via finite element simulations and compared with those obtained through spherical indentation. Other effects, such as elastic strain, indenter shape, contact area, and representative strain, which have not been considered properly in prior studies on the creep test, are also discussed.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.17 no.3
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• pp.301-309
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• 1999

Real-time kinematic (RTK) GPS surveying which allows centimeter level accuracy of three-dimensional coordinates without post-processing has become recognized as a major advance in GPS technology. Employing On-The-Fly initialization technique, the RTK system can escape from cycle slip problems that have affected as a main obstacle factor in traditional kinematic and static approaches. The objective of this research was to evaluate accuracy and effectiveness of the RTK-GPS surveying. First, the continuous RTK observation of a base line was conducted for the purpose of finding out the repeatability of the RTK surveying and the results which were then compared against results from static surveying showed RMS errors of $\pm{3mm}\;and\;\pm{13mm}$ for their respective horizontal and vertical components. On a test network of 30 stations covering the small area, the results of RTK testing were compared against those from not only post-processing kinematic and rapid-static surveyings but conventional surveyings and also the efficiency of RTK were analyzed. In addition, geoid heights which were derived by combination of GPS and spirit leveling about all of the points within the network were compared against those derived by the PNU95 and EGM96 models respectively.

• Journal of Korean Medical classics
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• v.20 no.1
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• pp.75-84
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• 2007

본논문천명(本論文闡明) "류경(類經)" 위안등창익의학사상적천원(爲安藤昌益醫學思想的泉源), 종안등창익학습(從安藤昌益學習) "류경(類經)" 적계단래비판(的階段來批判) "류경(類經)", 집중적연구관찰극복계단적전화과정(集中的硏究觀察克服階段的轉化過程). 안등창익(1703-1762)재일본강호시대시개즉독창우진보적사상가야시중의사(安藤昌益(1703-1762)在日本江戶時代是個卽獨創又進步的思想家也是中醫師). 타통과(他通過)'자연진영도(自然眞營道)'등굉대적저술(等宏大的著述), 부근논술료사회철학급자연철학(不僅論述了社會哲學及自然哲學), 이차재일본의학사상난이발현적독특적의학사상급여체계화(而且在日本醫學史上難以發現的獨特的醫學思想給與體系化). 타이유교비판위기초(他以儒敎批判爲基礎), 비판중국의학대유유의적경향(批判中國醫學帶有有醫的傾向), 여후세파(與後世派), 고방파적맥락야부동(古方派的脈絡也不同), 독자제정일본의학(獨自制訂日本醫學). 타대어중국적음양오행설이진퇴론화사행팔기적호성론래대항(他對於中國的陰陽五行設以進退論和四行八氣的互性論來對抗), 대어'내경'적국가유추(analogy)내장관이유기생체적내장관래대치(對於‘內經’的國家類推(analogy)內臟觀以有機生體的內臟觀來對峙). 병차비판숙명론적운기론이제창대소우주론적생태학(ecology)적의학. 이차간래(以此看來), 안등창익적의학사상시이비판'내경'위개단(安藤昌益的醫學思想是以批判‘內經’爲開端). 아문가이통과안등창익적운기론적비판래명백(我們可以通過安藤昌益的運氣論的批判來明白), 타대'내경'적이해시의거장개빈적 "류경"(포괄'도익'화'부익')(他對'內經'的理解是依據張介賓的"類經"(包括'圖翼' 和 '附翼')). 안등창익일방면계승장개빈적운기론영일방면야지유비판적태도. 타주장십기래대체십간(他主張十氣來代替十干), 인위군화여상화시파군신적상하관계정당화(認爲君火與相火是把君臣的上下關係正堂化), 인이반대저양적사고방식(因而反對這樣的思考方式). 병차안등창익부정기성적음운학, 제창자연적운도(提唱自然的韻道), 아문가이확인대어타적사상장개빈적 "류경" 시위중요적기초(我們可以確認對於他的思想張介賓的 "類經" 是爲重要的基礎).

• Journal of Korea Multimedia Society
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• v.14 no.4
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• pp.517-528
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• 2011

In this paper, we propose an indoor navigation system that can do walk safely to the destination for visually impaired persons. The proposed system analyzes images taken with the camera finds the ID of the marker to identify the absolute position of the pedestrian. Using the distance and angle obtained from IMU(Inertial Measurement Unit) accelerometer sensor and a gyro sensor, the system decides the relative position of a pedestrian for the previous position to determine the next direction. At the same time, we simplify a complex spatial structure in front of user by means of ultrasonic sensors and determine an avoidance direction by estimating the patterns. Then, it uses a few IR(Infrared Rays) sensors to detect stair. Our system offers position of visually impaired persons incorporating multiple sensors and helps users to arrive to destination safely.

• The Journal of Korean Obstetrics and Gynecology
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• v.32 no.4
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• pp.25-38
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• 2019

Objectives: The purpose of this study is to analysis differences of heart rate variability (HRV), body composition, digital infrared thermal imaging (DITI), and electro pulse graph by whether there are some causes of dysmenorrhea or not. Methods: We studied 89 patients who took at least one test among HRV, Body composition, DITI, and electro pulse graph visiting Kyung Hee University Hospital at Gangdong from March 1, 2014 to May 7, 2019. Results: There were statistically significant differences in Low frequency (LF), LF norm and High frequency norm (HF norm) of HRV between primary dysmenorrhea patients and secondary dysmenorrhea patients. There were statistically significant differences in Body Mass Index (BMI) and body fat percentage of Body composition between two groups. But both BMI were included in normal range. There were no statistically significant difference in DITI results. And there was significant difference of Estimated circulation resistance (ECR) between two groups. Conclusions: The results suggest that hormone imbalance of secondary dysmenorrhea patients can affect HRV results. And because of high ECR, phlegm pathology can be more considered in secondary dysmenorrhea patients. Further study should be conducted to confirm the results of body composition and DITI differences.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.543-543
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• 2015

국내에는 17,500여개의 농업용 저수지가 전국적으로 분포하고 있다. 이들 저수지의 대부분은 1945년 이전에 설치되어 경과년수가 70년 이상된 저수지가 전체의 약 52%에 달하며, 1962년 이전에 설치되어 50년 이상된 저수지는 전체의 68.3%에 이르고 있다. 국내 약 70%에 해당하는 저수지는 50년이 넘은 노후화된 저수지로 오염물질의 장기간의 퇴적으로 인해 수용적이 많이 줄었고, 퇴적층의 오염물질 재용출로 인해 호소의 수질악화에 상당한 영향을 주고 있을 것으로 추정된다. 따라서 본 연구에서는 호소 설치 경과년수와 수질간의 상관성을 알아보기 위하여 상관분석을 실시하였고, 일원분산분석과 Scheffe Test를 통해 경과년수에 따라 호소 수질에 유의한 차이가 있는 지에 대해서 살펴보았다. 저수지 설치 경과년수와 수질항목 pH, EC, DO, SS, COD, TN, TP, Chl-a와의 상관성을 분석한 결과, DO를 제외한 모든 항목에서 10~40%의 정(+)의 상관성을 보여 저수지 준공년도가 오래된 것일수록 수질오염도가 높아지는 것으로 나타났다. 농업용 저수지의 준공 경과년수 구간에 따른 수질이 통계적으로 유의한 차이가 있는가를 알아보기 위하여 호소의 경과년수를 70년 이상($Y{\geq}70$), 50년 이상 70년 미만($50{\leq}Y$<70), 30년 이상 50년 미만($30{\leq}Y$<50), 10년 이상 30년 미만($10{\leq}Y$<30), 10년 미만(Y<10) 등 5개 구간으로 분류하여 일원분산분석을 실시하였다. 통계분석에 사용된 자료는 2013년도 농업용수 수질측정망 조사자료 3,175개를 이용하였다. 수온, pH, EC, COD, TN, TP, SS, Chl-a 등 거의 모든 수질항목에서 유의수준 p<0.001 에서 통계적으로 유의한 차이가 있는 것으로 나타났다. 사후검정인 Scheffe Test를 실시한 결과, DO를 제외한 모든 항목에서 70년 이상 된 구간($Y{\geq}70$)과 50년이상 70년 미만(의 구간에서 다른 구간에 비해 다소 높은 값을 보였고, 준공 경과년수가 작아질수록 농도가 점차적으로 낮아지는 경향을 보였다. 이러한 결과는 저수지가 설치된 지 오래되어 노후화가 진행될수록 수질오염도 높아지는 것을 알 수 있었다.

• Journal of Soil and Groundwater Environment
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• v.14 no.3
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• pp.22-31
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• 2009

Recently use of renewable energies such as geothermal energy for space heating and cooling is increasing in Korea due to energy crisis and global warming. Ground source heat pump (GSHP) is known as one of the most environment-friendly HVAC (heating, ventilation and air-conditioning) systems in the world. However, some potential effects caused installation and operation of the GSHP systems on soil and groundwater environment are reported. The potential effects are closely related with inappropriate installation, operation and closure of the GSHP systems. In this paper, possible effects of the GSHPs on soil and groundwater environments are reviewed.