• 한국작물학회지
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• 제30권1호
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• pp.84-92
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• 1985

보리품종 강보리, 올보리 및 수원 18호를 공시하여 파종기를 달리하였을때의 생육시기별 주요생태 및 수량구성형질의 변이에 관한 일련의 시험을 수행한바 그 결과를 요약하면 다음과 같다. 1. 출아일수는 연차 및 파종기에 따라 7 $\pm$ 1 ~ 22 $\pm$ 7 일의 변이를 보였으며, 일평균 지중5cm의 온도와는 고도의 부의 상관관계가 있었다. 2. 유수는 파종기에 관계없이 영화분화후기(X기)를 기점으로 급신장하여 출수기를 전후하여 완료하였는데 신장정도는 연차나 품종간 차이보다는 파종기의 조만이 더 크게 영향하였다. 3. 절간은 소수분화후기~영화분화전기에 걸쳐 신장을 개시하여 기부절간에서 상부절간에 이르는 단계적인 신장양상을 보였고 상부절간일수록 신장량도 많았다. 4. 초장의 중장에 따른 유수 및 절간의 신장경과는 초장이 20cm전후에서 유수장은 0.69~0.74mm이고 하부의 제4,5절간이 신장을 시작하였으며, 40cm에서 유수장은 10.2~18.6mm였으며 이때 전체절간의 신장양상을 보였다. 5. 수량구성요소인 수수는 파종기, 품종 및 연차의 순으로 영향하는 정도가 큰데 비하여 일수입수와 천립중은 연차, 품종 및 파종기의 순으로 이들 요소의 제한요인이 상이하였다. 6. 수량은 연차나 품종간에는 유의차가 없었으나 파종기차이에서는 고도의 유의성이 인정되었다.

• International Journal of Aeronautical and Space Sciences
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• 제14권4호
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• pp.297-309
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• 2013

Design optimization is a mathematical process to find an optimal solution through the use of formal optimization algorithms. Design plays a vital role in the engineering field; therefore, using design tools in education and research is becoming more and more important. Recently, numerical design optimization in fluid mechanics, which uses computational fluid dynamics (CFD), has numerous applications in the engineering field, because of the rapid development of high-performance computing resources. However, it is difficult to find design optimization software and contents for educational purposes in aerospace engineering. In the present study, we have developed an aerodynamic design framework specifically for an airfoil, based on the EDucation-research Integration through Simulation On the Net (EDISON) portal. The airfoil design framework is composed of three subparts: a geometry kernel, CFD flow analysis, and an optimization algorithm. Through a seamless interface among the subparts, an iterative design process is conducted. In addition, the CFD flow analysis and the design framework are provided through a web-based portal system, while the computation is taken care of by a supercomputing facility. In addition to the software development, educational contents are developed for lectures associated with design optimization in aerospace and mechanical engineering education programs. The software and content developed in this study is expected to be used as a tool for e-learning material, for education and research in universities.

• 농업과학연구
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• 제7권1호
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• pp.12-26
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• 1980

1977년(年)에 충남대학교(忠南大學校) 농과대학(農科大學)에서 수집(蒐集)한 재래종(在來種) 옥수수 육종(育種)에 이용(利用)될 수 있는 새로운 육종재료(育種材料)를 유지(維持)하고 또 찾기 위해 충남대학(忠南大學) 포장(圃場)과 농촌진흥청(農村振興聽) 작물시험장(作物試驗場) 포장(圃場)에 파종(播種)하여 얻어진 결과(結果)를 요약(要約)하면 다음과 같다. 편의상(便宜上) 실제(實際)로 옥수수 육종(育種)에 응용(應用)할 수 있는 응용면(應用面)과 장차 기초연구(基礎硏究)를 위해 필요(必要)하다고 생각되는 학술면(學術面) 그리고 재래종(在來種) 전반(全般)에 걸친 유전적(遺傳的) 정보(情報)로 나누어 요약(要約)하고자 한다. A. 응용면(應用面) 1. 근래(近來)에 정부(政府)에서 도입(導入) 장려하고 있는 재래종(在來種)(마치종(馬齒種))에 피해(被害)를 주는 흑조위축병(黑條萎縮病)에 내병성(耐病性)인 계통(系統)이 확인(確認)되었다. 2. 곡실(穀實)의 다수(多收)와 싸이레지용(用)으로 이용(利用)할 수 있다고 보이는 다수성(多穗性) (Prolific type) 옥수수 계통(系統)과 분지성(分枝性) 옥수수 계통(系統)이 확보(確保)되었다. 3. 여러 유형(類型)의 찰옥수수 계통(系統)이 확인(確認)되었다. (현재(現在) 작물시험장(作物試驗場)에서 연구중(硏究中)임). 4. 또 여러 유형(類型)의 폭열종(爆裂種) 옥수수가 확인(確認)되었다. 5. 웅수출현기(雄穗出現期)에 있어서도 많은 변이(變異)를 보여주어 웅수출현(雄穗出現)을 조절(調節)할 수 있는 육종재료(育種材料)가 확보(確保)되었다. 6. 고단백질(高蛋白質) 옥수수를 육종(育種)할 수 있는 육종재료(育種材料)가 확보(確保)되었다. B. 기초학술면(基礎學術面) 1. 새로운 sugary인자(因子)의 표현형(表現型)이 관찰(觀察)되었다. 2. 새로운 opaque인자(因子)의 표현형(表現型)이 관찰(觀察)되었다. 3. 새로운 웅수불임계통(雄穗不稔系統)이 관찰(觀察)되었다. 4. 다수성(多穗性) 계통(系統)이 관찰(觀察)되었다. 5. 다지성(多枝性) 계통(系統)이 관찰(觀察)되었다. 6. 내흑조위축병(耐黑條萎縮病) 계통(系統)이 관찰(觀察)되었다. 7. 폭열종(爆裂種) 계통(系統)이 관찰(觀察)되었다. 8. 웅수출현(雄穗出現)에 있어서 환경(環境)에 예민(銳敏)한 계통(系統)과 둔(鈍)한 계통(系統)이 관찰(觀察)되었다. C. 재래종(在來種)의 유전적(遺傳的) 정보(情報) 간장(稈長), 100립종(粒種)에 대(對)하여 자식열세(自殖劣勢) 잡종강세현상(雜種强勢現像)을 분석(分析)하였던 바. 1. 대부분(大部分)의 수집재래종(蒐集在來種) (강원도(江原道) 등 산간지역(山間地域) 주민(住民) 제외(除外))들이 동형접합체화(同型接合體化) 되어 있음을 알 수 있었다. 2. 간장(稈長)에 대(對)한 자식열세현상(自殖劣勢現像)은 평균(平均) 6%로서 거의 모든 계통(系統)이 자식열세현상(自殖劣勢現像)을 보였으며 아울러 잡종강세현상(雜種强勢現像)도 컸다(평균(平均) 40%). 그리고 이들 자식열세현상(自殖劣勢現像)과 잡종강세현상(雜種强勢現像)을 퍼센트로 표시(表示)할때에 계통(系統)들 간(間)에 큰 차이(差異)가 있었다. 3. 100립종(粒種)에 대(對)한 자식열세현상(自殖劣勢現像)은 평균(平均) 16%로서 간장(稈長)에 있어서와 같이 모든 계통(系統)들이 자식열세현상(自殖劣勢現像)을 보였다. 잡종강세현상(雜種强勢現像)에 있어서는 평균(平均) 43%로서 자식열세현상(自殖劣勢現像)에 비(比)하여 그 크기가 컸다. 100립종(粒種)에 대(對)한 자식계통(自殖系統)과 잡종강세현상(雜種强勢現像)에 대(對)한 계통간(系統間) 차이(差異)도 컸다.

• Nuclear Engineering and Technology
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• 제39권2호
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• pp.133-142
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• 2007

The Electric Power Research Institute (EPRI) demonstrated a method for monitoring the performance of instrument channels in Topical Report (TR) 104965, 'On-Line Monitoring of Instrument Channel Performance.' This paper presents the results of several models originally developed by EPRI to monitor three nuclear plant sensor sets: Pressurizer Level, Reactor Protection System (RPS) Loop A, and Reactor Coolant System (RCS) Loop A Steam Generator (SG) Level. The sensor sets investigated include one redundant sensor model and two non-redundant sensor models. Each model employs an Auto-Associative Kernel Regression (AAKR) model architecture to predict correct sensor behavior. Performance of each of the developed models is evaluated using four metrics: accuracy, auto-sensitivity, cross-sensitivity, and newly developed Error Uncertainty Limit Monitoring (EULM) detectability. The uncertainty estimate for each model is also calculated through two methods: analytic formulas and Monte Carlo estimation. The uncertainty estimates are verified by calculating confidence interval coverages to assure that 95% of the measured data fall within the confidence intervals. The model performance evaluation identified the Pressurizer Level model as acceptable for on-line monitoring (OLM) implementation. The other two models, RPS Loop A and RCS Loop A SG Level, highlight two common problems that occur in model development and evaluation, namely faulty data and poor signal selection

• 한국멀티미디어학회논문지
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• 제21권5호
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• pp.583-591
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• 2018

With the development of ICT(Information and Communication Technology), the number of smart devices is rapidly increasing. LBS(Location Based Service) applications that provide user's location based service are used in various fields. There is also a growing demand for indoor precision positioning technology to provide seamless services. In this paper, we propose an indoor positioning system that estimates the location of a smartphone user. The proposed algorithm determines whether the received signal is LOS(Line-of-Sight) or NLOS(Non-Line of-Sight) in order to decrease multipath effect by the indoor environment. The proposed positioning algorithm is very simple and requires only the AP(Access Point) coordinates. In addition, it requires only two APs for estimating the location of a smartphone user. The proposed algorithm is a practically applicable technology without any additional hardware and kernel modification in the smartphone. In the experiment results, the reliability of the positioning system was found to be within 0.83 m.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권10호
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• pp.4887-4907
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• 2017

Accurate traffic flow forecasting is critical to the development and implementation of city intelligent transportation systems. Therefore, it is one of the most important components in the research of urban traffic scheduling. However, traffic flow forecasting involves a rather complex nonlinear data pattern, particularly during workday peak periods, and a lot of research has shown that traffic flow data reveals a seasonal trend. This paper proposes a new traffic flow forecasting model that combines seasonal relevance vector regression with the hybrid chaotic simulated annealing method (SRVRCSA). Additionally, a numerical example of traffic flow data from The Transportation Data Research Laboratory is used to elucidate the forecasting performance of the proposed SRVRCSA model. The forecasting results indicate that the proposed model yields more accurate forecasting results than the seasonal auto regressive integrated moving average (SARIMA), the double seasonal Holt-Winters exponential smoothing (DSHWES), and the relevance vector regression with hybrid Chaotic Simulated Annealing method (RVRCSA) models. The forecasting performance of RVRCSA with different kernel functions is also studied.

• 한국해양공학회지
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• 제21권4호
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• pp.8-14
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• 2007

A particle method recognized as one of gridless methods has been developed to investigate incompressible viscous flaw. The method is more feasible and effective than conventional grid methods for solving the flaw field with complicated boundary shapes or multiple bodies. The method is consists of particle interaction models representing pressure gradient, diffusion, incompressibility and the boundary conditions. In the present study, the models in case of various simulation condition were checked with the analytic solution, and applied to the two-dimensional Poiseuille flow in order to validate the developed method.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2014년도 하계학술대회
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• pp.163-165
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• 2014

In this paper, we propose a world's first programmable video processing platform for video quality enhancement of 8K ($7680{\times}4320$) UHD (Ultra High Definition) TV at 60 frames per second. To support huge computation and memory bandwidth of video quality enhancement for 8K resolution, the proposed platform has unique features like symmetric multi-cluster architecture for data partitioning, ring data-path between clusters to support data pipelining, on-the-fly processing architecture to reduce DDR bandwidth, flexible hardware to accelerating common kernel in video enhancement algorithms. In addition to those features, general programmability of SRP (Samsung reconfigurable processor) as main core of the proposed platform makes it possible to upgrade continuously video enhancement algorithm even after the platform is fixed. This ability is very important because algorithms for 8K DTV is under development. The proposed sub-system has been embedded into SoC (System on Chip) and new 8K UHD TV using the programmable SoC is expected at CES2015 for the first time in the world.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.1190-1193
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• 2005

In recent years, as the demands of VBNS and VDSL increase, the development of kernel parts of optical communication such as PLC(Planar Light Circuit), Coupler, and WDM elements increases. The alignment and the attachment technology are very important in the fabrication of optical elements. In this paper, the optical alignment characteristics of multi-axis ultra precision stage were studied. The alignment algorithms were studied for applying to the ultra precision multi-axis stage. The alignment algorithm is comprised of field search and peak search algorithms. The contour of optical power signals can be obtained by field search and the precise coordinate can be found out by peak search. Two kinds of alignments, such as 1 ch. input vs. 1 ch. output optical stack, and 1 ch. input vs. 8 ch. output PLC stacks were performed for investigating the alignment characteristics.

• 한국정밀공학회지
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• 제21권12호
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• pp.92-99
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• 2004

The formation degree of sustain (ITO pattern) decides quality of PDP (Plasma Display Panel). For this reason, it makes efforts in searching defects more than 30 un as 100%. Now, the existing inspection is dependent upon naked eye or microscope in off-line PDP manufacturing process. In this study developed prototype inspection system of PDP 170 glass is based on line-scan mechanism. Developed system creates information that detects and sorts kinds of defect automatically. Designed inspection technology adopts multi-vision method by slip-beam formation for the minimum of inspection time and detection algorithm is embodied in detection ability of developed system. Designed algorithm had to make good use of kernel matrix that draws up an approach to geometry. A characteristic of defects, as pin hole, substance, protrusion, are extracted from blob analysis method. Defects, as open, short, spots and et al, are distinguished by line type inspection algorithm. In experiment, we could have ensured ability of inspection that can be detected with reliability of up to 95% in about 60 seconds.