• Journal of Biosystems Engineering
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• 제32권4호
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• pp.256-262
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• 2007

Image processing systems have been used to measure the plant parameters such as size, shape and structure of plants. There are yet some limited applications for evaluating plant colors due to illumination conditions. This study was focused to present adaptive methods to analyze plant leaf color regardless of illumination conditions. Color patches attached on the calibration bars were selected to represent leaf colors of lettuces and to test a possibility of health monitoring of lettuces. Repeatability of assigning leaf colors to color patches was investigated by two-tailed t-test for paired comparison. It resulted that there were no differences of assignment histogram between two images of one lettuce that were acquired at different light conditions. It supported that use of the calibration bars proposed for leaf color analysis provided color constancy, which was one of the most important issues in a video color analysis. A health discrimination equation was developed to classify lettuces into one of two classes, SOUND group and POOR group, using the machine vision. The classification accuracy of the developed health discrimination equation was 80.8%, compared to farmers' decision. This study could provide a feasible method to develop a standard color chart for evaluating leaf colors of plants and plant health monitoring system using the machine vision.

• 한국건설순환자원학회논문집
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• 제7권1호
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• pp.16-21
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• 2019

본 연구에서는 순환토사가 농지개량용으로 적용 가능성이 있는지 그리고 채움재로서의 활용 가능성이 있는지 알아보기 위하여 순환토사의 물리적 화학적 성분 분석을 평가하였고, 비교생육실험 및 발아실험 그리고 식생대층 높이에 따른 생육실험을 진행하였다. 물리적 성분 분석결과 SW와 SP계열로 조사되었으며 토성은 양질사토로 조사되었다. 순환토사를 농지개량용으로 사용하기 위해서는 점토 및 미사와 혼합하여 사용하면 될 것으로 사료된다. 화학적 성분 분석결과 pH는 일반 토양보다 높으나 중금속은 토양오염우려기준의 1지역 기준치 이내로 나타났다. 발아실험결과 순환토사를 75% 미만으로 혼합하여 사용했을때 영향이 거의 없는 것으로 조사되었고, 원예용 상토에 순환토사 40% 미만을 혼합하여 사용하면 생육장해가 미비한 것으로 나타나 일반적인 토양과 차이가 없는 것으로 확인되었다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.644-646
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• 2007

온라인게임 산업은 많은 성장과 발전을 이루어 왔다. 게임업체들의 고통 중의 하나로 온라인의 특성에 따라 짧아지는 게임제작 파이프라인과, 빠른 제작 스케줄에 적합하며 쉽게 게임 제작 시 응용 적용이 가능한 다양한 3D게임캐릭터 애니메이션의 형태별, 동작별, 종류별로 분류된 애니메이션 모델 기준연구를 필요로 하고 있다. 본 연구에서는 실 사례 중심으로 게임에 이용된 디지털 기반 게임 캐릭터의 요소별 모델 분류 설정을 연구 분석하여 3D게임캐릭터 애니메이션 제작에 필요한 기초자료를 도출 한 후 디지털 모션캡처시스템을 활용하여 실시간으로 다양한 캐릭터 애니메이션의 실사 움직임 제어연구를 진행하여 게임산업 및 디지털 콘텐츠 산업에 효율성이 높고 짧은 시간에 적용 가능한 캐릭터애니메이션 제작 과정 및 제작 파이프라인 도출해보고자 한다.

• 인간식물환경학회지
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• 제21권6호
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• pp.461-471
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• 2018

The role of urban agriculture should not be limited as a small-scale crop cultivation activity as it was, but it has to be considered as an entire process of a agriculture activity for the restoration of the city community. This study is based on the assumption that there has been a significant change in urban lifestyle and urban farming preference, considering the overall improvement in standard of living after implementation of five day work week system. It was conducted for urban citizens who were interested in actual urban agriculture for ages 19 and over who visited the Korea Urban Agriculture Exhibition in 2018. Only 115 valid samples were used for the empirical analysis. To analyze the demographic characteristics and effects of urban agriculture, frequency analysis and descriptive statistics were conducted. In order to analyze the reliability and validity of the measurement variables of the effect, the variables that deteriorate the validity were removed and 15 variables of the urban agricultural effect were selected. According to the result of factor analysis, three factors were extracted as follows: socially sustainable effect, negative effect and economically sustainable effect. In order to examine the effects of urban agriculture depending on income level, the one-way ANOVA, which is a statistical technique for verifying differences in the sample means, was performed. The psychological stability of people, the recovery of humanity through communion with nature, and the vitalization of agriculture linked with local agriculture had significant correlations with income level. The negative effect showed no significant correlation with income level. The improvement of the local environment was found to have an impact in relation with income level. We expect that there will be more studies on policies for the new types and models of urban agriculture in order to make it easier for urban citizens to approach it.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 추계학술대회
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• pp.725-728
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• 2014

어린이를 상대로 한 강력범죄가 매년 계속해서 늘고, 중범죄로 분류할 만큼 심각성은 누구나 인지하고 있다. 하지만 근본적인 범죄를 감소시키기 위한 노력은 부족하다. 따라서 이를 해결 할 수 있는 보안시스템이 필요하다. 본 논문은 어린이에게 위협을 가할 수 있는 존재인 어른을 구분하고 추적 감시하여 어린이를 보호하는 방법이다. 제안 방법은 사람의 키, 팔 길이, 다리 길이, 머리 수직 길이, 머리 너비 등 한국인 표준 신체사이즈를 기준으로 하였다. 또한 제안 방법은 검출 된 객체의 화소 수의 비율과 기준 값 비율의 비교를 통해 어른과 아이를 구분하였다. 제안 방법에서 5가지 구분 방법을 처리 할 때 전체영상에서 특정 객체 영역만을 검출하여 처리하기 때문에 처리 속도가 빠르다. 이를 통하여 특정 객체의 비교가 가능하게 되는 장점이 있다.

• 복식문화연구
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• 제16권6호
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• pp.1035-1049
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• 2008

The purpose of this study was specifically focused on the lower garment sizing system of adolescent apparel, especially on trousers for adolescent boys. Research Method was performed by using the physical measurements of adolescent boys ($14\sim19$ years old, n=1,344) based on the 'he fifth Korean national physical standard reports' surveyed by SIZEKOREA. The basic materials for this study are obtained from the observations of physical characteristics and classification of physical figures based on the characteristics from waist down. The results from this study are as follows. 1) according to the analyses of physical changes, most items including height, circumference, length, breadth and depth were increased at the age of $14\sim18$ and gradually reduced at the age of 19. 2) The factors which compose the lower body resulted were appeared that the first factor was vertical factor, the second factor was horizontal factor, the third factor was hip length, and the last factor was buttlock-popliteal length. 3) Formalization of physical figures for adolescent boy's lower body analyzed from factors grouped three types. 4) The basic parts that we used to propose the apparel sizing system distinguished by physical figures were Waist Circumference (Omphalion) (every 3cm regular gap) and Hip Circumference (irregular gap). Physical figures assigned 5 to Type T, and 4 to type M. The reference measurement items were divided into 7 items which are correlated with apparel manufacture.

• 정보보호학회논문지
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• 제24권6호
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• pp.1285-1292
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• 2014

군은 업무의 효율성을 높이고 국방정보를 적시에 지원하여 지휘관 및 관리자의 의사결정을 돕기 위해 주요 응용체계를 개발하였다. 국방정보체계를 이용하여 생산 처리 저장 유통되는 자료는 군사기밀보호법에 근거하여 관리, 해제 및 보호되어야 하므로, 국방부는 다양한 연구를 통하여 군사보안업무훈령 개정 및 준용 방안과 함께, 비밀을 분류할 수 있는 세부 기준을 마련하였으며, 온라인 비밀처리가 가능한 비밀관리시스템을 운영하고 있다. 그러나 체계 내에 저장된 비밀데이터의 경우, 군사보안업무훈령을 원안대로 적용하여 비밀데이터 관리를 수행하기에는 군의 현실과 부합하지 않는 문제점이 존재하여 이에 대한 관리방안 연구가 시급한 실정이다. 본 논문에서는 국방정보체계 중 비밀데이터를 다루는 국방탄약정보체계를 중심으로 비밀 분류기준 및 연구사례를 참고하여, 한계점을 식별하고 해결 방안을 도출하여 군의 현실에 부합될 수 있는 비밀데이터 관리 방안을 제시하고자 한다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제11권1호
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• pp.82-96
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• 2019

A semi-submersible structure has been widely used for offshore drilling and production of oil and gas. The small water plane area makes the structure very sensitive to weight increase in terms of payload and stability. Therefore, it is necessary to lighten the substructure from the early design stage. This study aims at an optimization of hull structure based on a sophisticated yield and buckling strength in accordance with classification rules. An in-house strength assessment system is developed to automate the procedure such as a generation of buckling panels, a collection of required panel information, automatic buckling and yield check and so on. The developed system enables an automatic yield and buckling strength check of all panels composing the hull structure at each iteration of the optimization. Design variables are plate thickness and stiffener section profiles. In order to overcome the difficulty of large number of design variables and the computational burden of FE analysis, various methods are proposed. The steepest descent method is selected as the optimization algorithm for an efficient search. For a reduction of the number of design variables and a direct application to practical design, the stiffener section variable is determined by selecting one from a pre-defined standard library. Plate thickness is also discretized at 0.5t interval. The number of FE analysis is reduced by using equations to analytically estimating the stress changes in gradient calculation and line search steps. As an endeavor to robust optimization, the number of design variables to be simultaneously optimized is divided by grouping the scantling variables by the plane. A sequential optimization is performed group by group. As a verification example, a central column of a semi-submersible structure is optimized and compared with a conventional optimization of all design variables at once.

• 한국전산구조공학회논문집
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• 제35권5호
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• pp.259-266
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• 2022

본 논문에서는 프리팹 구조물의 품질관리를 위한 딥러닝 및 비전센서 기반의 조립 성능 평가 모델을 개발하였다. 조립부 검출을 위해 인코더-디코더 형식의 네트워크와 수용 영역 블록 합성곱 모듈을 적용한 딥러닝 모델을 사용하였다. 검출된 조립부 영역 내의 볼트홀을 검출하고, 볼트홀의 위치 값을 산정하여 k-근접 이웃 기반 모델을 사용하여 조립 품질을 평가하였다. 제안된 기법의 성능을 검증하기 위해 조립부 모형을 3D 프린팅을 이용하여 제작하여 조립부 검출 및 조립 성능 예측 모델의 성능을 검증하였다. 성능 검증 결과 높은 정밀도로 조립부를 검출하였으며, 검출된 조립부내의 볼트홀의 위치를 바탕으로 프리팹 구조물의 조립 성능을 5% 이하의 판별 오차로 평가할 수 있음을 확인하였다.

• 대한임상독성학회지
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• 제20권2호
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• pp.45-50
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• 2022

Purpose: This study utilizes the NEDIS (National Emergency Department Information System) database to suggest a predictive model for snakebite and envenomation in Korea by analyzing the geographical distribution and seasonal variation of snakebite patients visiting the ER. Methods: This was a retrospective study on snakebite patients visiting the ER using the NEDIS database from January 2014 to December 2019. The subjects include patients with the KCD (Korea Standard Classification of Disease) disease code T63.0 (Toxic effect of contact with snake venom). Geographical location, patient gender, patient age, date of ER visit, treatment during the ER stay, and disposition were recorded to analyze the geographical distribution and seasonal variation of snakebite patients in Korea. Results: A total of 12,521 patients were evaluated in this study (7,170 males, 54.9%; 5,351 females, 40.9%). The average age was 58.5±17.5 years. In all, 7,644 patients were admitted with an average admission time of 5.04±4.7 days, and 2 patients expired while admitted. The geographical distribution was Gyeongsang 3,370 (26.9%), Cheonra 2,692 (21.5%), Chungcheong 2,667 (21.3%), Seoul Capital area 1,999 (16.0%), Kangwon 1,457 (11.6%), and Jeju 336 (2.7%). The seasonal variation showed insignificant incidences in winter and higher severity in spring and summer than in fall: winter 27 (0.2%), spring 2,268 (18.1%), summer 6,847 (54.7%), and fall 3,380 (27.0%). Conclusion: Patients presenting with snakebites and envenomation in the emergency room were most common in the Gyeongsang area and during summer. The simple seasonal model predicted that 436 snakebites and 438 envenomation cases occurred in July and August. The results of this study can be applied to suitably distribute and stock antivenom. Appropriate policies can be formed to care for snakebite patients in Korea.