• 한국해양공학회:학술대회논문집
• /
• 한국해양공학회 2004년도 학술대회지
• /
• pp.279-284
• /
• 2004

Red tide(harmful algae) in the Korean Coastal Waters has a given a great damage to the fishery every year. However, the aim of our study understands the influence of meteorological factors (air and water tempaerature, precipitation, sunshine, solar radiation, winds) relating to the mechanism of red tide occurrence and monitors red tide by satellite remote sensing, and analyzes the potential area for red tide occurrence by GIS. The meteorological factors have directly influenced on red tide formation. Thus, We want to predict and apply to red tide formation from statistical analyses on the relationships between red tide formation and meteorological factors. In future, it should be realized the near real time monitoring for red tide by the development of remote sensing technique and the construction of integrated model by the red tide information management system (the data base of red tide - meteorological informations).

• 생물정신의학
• /
• 제10권2호
• /
• pp.116-120
• /
• 2003

Objectives:Although polymorphisms of apolipoprotein E have been investigated in many neuropsychiatric disorders, results were controversial and even contradictory. The purpose of this study was to investigate the genotypes of apolipoprotein E in schizophrenia and healthy controls, and to compare them in two groups in terms of distribution of apolipoprotein E genotype and allele. Method:Using polymerase chain reaction and amplified refractory mutation system, apolipoprotein E genotypes were identified in 77 schizophrenics and 115 healthy control persons. Results:The results were as follows 1) When genotypes of apolipoprotein E were classified into ${\varepsilon}2/2$, ${\varepsilon}2/3$, ${\varepsilon}2/4$, ${\varepsilon}3/3$, ${\varepsilon}3/4$, ${\varepsilon}4/4$ according to phenotypes, there were no statistical differences in genotypes between two groups 2) In terms of allele frequency, there were also no statistical differences between two groups Conclusion:These results suggest that genotypes and alleles of apolipoprotein E seem to be unrelated to the pathogenesis of schizophrenia.

• 제어로봇시스템학회논문지
• /
• 제20권9호
• /
• pp.930-935
• /
• 2014

A Gabor filter is a linear filter used for edge detectionas frequency and orientation representations of Gabor filters are similar to those of the human visual system. In this thesis, we propose a pedestrian detection algorithm using a Gabor filter bank. In order to extract the features of the pedestrian, we use various image processing algorithms and data structure algorithms. First, color image segmentation is performed to consider the information of the RGB color space. Second, histogram equalization is performed to enhance the brightness of the input images. Third, convolution is performed between a Gabor filter bank and the enhanced images. Fourth, statistical values are calculated by using the integral image (summed area table) method. The calculated statistical values are used for the feature matrix of the pedestrian area. To evaluate the proposed algorithm, the INRIA pedestrian database and SVM (Support Vector Machine) are used, and we compare the proposed algorithm and the HOG (Histogram of Oriented Gradient) pedestrian detector, presentlyreferred to as the methodology of pedestrian detection algorithm. The experimental results show that the proposed algorithm is more accurate compared to the HOG pedestrian detector.

• Communications for Statistical Applications and Methods
• /
• 제18권1호
• /
• pp.35-45
• /
• 2011

우리나라 대부분의 대학들이 강의평가를 하는 첫째 목적은 수업개선이고, 둘째 목적은 교수업적평가의 기초 자료로 활용하기 위한 것이다. 많은 대학들이 참여율을 높이기 위해서 온라인을 이용한 강제적인 강의평가를 실시하고 있다. 그 결과 90% 이상인 높은 참여율은 얻었으나, 강의평가결과 중 51.4%는 10개 문항에 대하여 모두 같은 번호로 무성의하게 응답하는 결과를 초래하게 되었다. 이런 무성의한 자료를 제거하거나 보정하지도 않은 채, 모든 문항의 점수를 합한 절대 점수를 가지고 강좌를 서열화하고, 교수업적을 평가하고, 시간강사 재임용 여부 등에 기초 자료로 활용하고있다. 강의평가 자료를 통계분석하기 전에 학생들이 얼마나 성실하게 응답한 자료인지 먼저 확인해 보아야 한다. 대학 행정 당국은 양질의 강의평가 자료를 얻기 위하여 강제적인 현행 강의평가를 즉시 중지하고 전면적인 강의평가 제도 개선 방안을 강구해야 할 것이다.

• 한국농림기상학회지
• /
• 제22권3호
• /
• pp.135-143
• /
• 2020

단파 복사와 일조시간은 농작물 재배에 중요한 변수들이다. 그러나 국내에서 제공되는 일사 관측 자료는 수평 해상도가 높지 않아 농업 현장에 활용하기 어렵다. 본 연구에서는 지면대기모델링패키지(LAMP)를 이용하여 시간단위 일사 자료를 물리역학적으로 생산하고, 통계적 다운스케일링을 통해 고해상도 일단위 기상기후 DB를 구축하였다. 현재 이 DB는 품질 평가를 거쳐 농업가뭄 재해와 밭작물의 생육 현황을 진단하고 예측하는 '경기도 농업가뭄 예측시스템'의 공식 빅데이터 입력 자료로 활용되고 있다.

• 대한화학회지
• /
• 제3권1호
• /
• pp.3-8
• /
• 1954

Fowler obtained thermodynamic quantities assuming the theory which could be derived by representing the system with microcanonical ensemble, in order to introduce the temperature T of the system proper, he considered the combined systems which are composed of the system proper and another arbitrary system that is in thermal contact with the former, and represented the combined system by a microcanonical ensemble, here, he used the steepest descent method in his calculation. This Fowler's treatment is not only unsatisfactory at the point of theoretical view but also he could not make the formulation of free energy of Helmholtz's so that this formular was forced to be assumed. From the point of Quantum Statistical Mechanical view, the materially closed system which is in an equilibrium state with the temperature T is best represented by canonical ensemble. At the actual derivation of the distribution law and thermodynamic quantities, however, in order to avoid the difficulty of calculation Tolman proceeded his calculation either representing the system proper by the grand-canonical ensemble or adding a certain limitation.

• 대한한방부인과학회지
• /
• 제21권1호
• /
• pp.179-198
• /
• 2008

Purpose: Obesity is already a major clinical problem in Korea, so obesity prevention and treatment practices are gradually interested in Korean Medicine doctors. Moreover subjective body shape image entered as a important medical topic recently. To make a graph system for clinical tool which based on the Korean national standard physical scale. Methods: Physical data of the girth of upper arm, abdomen, hip, buttock, flank, calf, and body weight were statistically analyzed, which collected through the fifth national standard physical scale research. And then reviewed those statistical validation. Results: Relationship of the each body scale data and those graphs were fit and right statistically. Conclusion: These new achieved graph system of Korean standard body scales could be adopt as a useful clinical tool for body image related patients such as obesity, PCOD and postpartum patient.

• 농촌계획
• /
• 제13권2호
• /
• pp.27-38
• /
• 2007

This study, a sub-one of comprehensive research work titled under "A Evaluation System of Amenity / Disamenity Elements in Rural Villages", tried to propose a rational methodology for development of rating tabulation for evaluation of amenity / disamenity elements in rural villages. The system developed in the study has the formalized rating grades between 2 and 5 for convenience/simplification of analysis work. For each evaluation element in the lowest order of the system, 5 types of rating technique were arranged, which were based on statistical analysis using mean and standard deviation values, its existence or not, relative significance of its holding volume and quality, synthesized weight scale of its quality and quantity, and the others. And, standardized 4-steps procedure for rating tabulation was proposed. Finally, through case studies of 4 sample villages representing the flat-plain, upland, seashore and periurban rural areas, the applicability of this rating tabulation system was verified.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
• /
• pp.968-971
• /
• 2009

TFT-LCD display system is nowadays one of power-hungry components in portable products; technique of power reduction is thus essential for production of mobile phone. In this work, we minimize the display power, using computationally intelligent statistical methodology. Compared with a conventional design, 68.474% reductions on the current consumption could be obtained for a 2.2-inch of TFT-LCD display system of mobile phone. The total power consumption of the display system consisting of the backlight system and current consumption of display panel is thus successfully reduced form 68.305mW to 64.06mW (about 6.215% reductions).

• 산업경영시스템학회지
• /
• 제38권3호
• /
• pp.100-107
• /
• 2015

Recently as the manufacturers want competitiveness in dynamically changing environment, they are trying a lot of efforts to be efficient with their production systems, which may be achieved by diminishing unplanned operation stops. The operation stops and maintenance cost are known to be significantly decreased by adopting proper maintenance strategy. Therefore, the manufacturers were more getting interested in scheduling of exact maintenance scheduling to keep smooth operation and prevent unexpected stops. In this paper, we proposedan integrated maintenance approach in injection molding manufacturing line. It consists of predictive and preventive maintenance approach. The predictive maintenance uses the statistical process control technique with the real-time data and the preventive maintenance is based on the checking period of machine components or equipment. For the predictive maintenance approach, firstly, we identified components or equipment that are required maintenance, and then machine parameters that are related with the identified components or equipment. Second, we performed regression analysis to select the machine parameters that affect the quality of the manufactured products and are significant to the quality of the products. By this analysis, we can exclude the insignificant parameters from monitoring parameters and focus on the significant parameters. Third, we developed the statistical prediction models for the selected machine parameters. Current models include regression, exponential smoothing and so on. We used these models to decide abnormal patternand to schedule maintenance. Finally, for other components or equipment which is not covered by predictive approach, we adoptedpreventive maintenance approach. To show feasibility we developed an integrated maintenance support system in LabView Watchdog Agent and SQL Server environment and validated our proposed methodology with experimental data.