• 한국시뮬레이션학회논문지
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• 제10권1호
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• pp.51-62
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• 2001

For the productivity improvement, it is necessary to analyze problem of the system and evaluate alternative plans. But, it if hard to experiment and evaluate alternative plans in real existing system. Therefore, it is necessary to synthetically analyze and evaluate alternative plans using simulation and statistical analysis method. In this case study, as a simulation language, Promodel is used to compare and evaluate four alternatives which are considered to improve the productivity of an object system. The object system is constituted of a pretreatment line and a painting line. The purpose of this study is to analyze whether the decrease of the down time in pretreatment line can be effective to the productivity improve comparing with exiting system and other alternatives. The other purpose is to choose an alternative that has the best productivity improvement. The results of the simulation show that the possibility of improvement in productivity by decreasing the down time of pretreatment line. Two-Stage Bonferroni Procedure is used to choose the best alternative.

• Journal of Nutrition and Health
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• 제27권1호
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• pp.46-52
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• 1994

Recently it is reported that RBC membrane fluidity decreases and RBC calcium levels increase with age. The aim of this study was to analyze changes in lipid and calcium metabolism with age, and to seek relationship of diet and metabolism. With clinically normal Korean adults(male 60, female 63), this study was carried out in three phases : 1) to analyze fatty acid percentage of RBC membrane, 2) to analyze calcium levels of RBC with age, and 3) to compare the effects of dietary fatty acid intake on blood fatty acid profiles. The results are as follows : The P/S ratio of RBC membrane fatty acid decreased with age. The RBC calcium content increased according to age, with women having a higher level than men. The higher intake groups of linolenic acid(C18:3) has statistically higher serum linolenic acid levels. But dietary effects of membrane fatty acid were not found. Therefore, the further research to seek the possible relationship of diet and membrane fatty acid should be continued.

• 복식문화연구
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• 제9권6호
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• pp.872-880
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• 2001

Knockoff products, called forgeries or imitations, are copies of famous original brand goods from abroad. Most of knockoff fashion products manufactured in Korea are famous fashion brand names. The purposes of the paper us: first, to examine and analyze general consumer purchasing behavior toward knockoff fashion products; second, to analyze the purchasing behavior toward knockoff goods according to demographic features; third, to materialize the attributes of knockoff fashion items consumers purchase; fourth, to reveal the relation between the attribute types of knockoff goods, and demographic features and purchasing behavior. The result explained so for reveals that the students'purchasing behaviour differs according to demographic features and general features of the products purchasing. This result should not be interpreted by expanding to the whole group of girl college students or consumers, as the sample used in this study is limited to those in Seoul area. Therefore, following studies are expected to expand the range of subjects'age, and to compare and analyze purchasing behaviour difference of knockoff products and imported original brand names.

• 한국도로학회논문집
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• 제19권6호
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• pp.1-11
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• 2017

PURPOSES : The purpose of this study is to compare noise reduction quantities between before/after two-layer low noise pavement implementation using equivalent noise level analysis and to analyze the noise reduction effects of the two layer low noise pavement with a statistical method such as the Anderson-Darling Test. METHODS : In order to compare and to analyze noise reduction effects between before/after two-layer low noise pavement implementation, data acquisition as noise levels on a roadside and an apartment rooftop was conducted in the study area. The equivalent noise level was estimated in order to compare noise reduction quantities and the Anderson-Darling Test was carried out for estimating noise reduction effects of the two-layer low noise pavement. RESULTS : The equivalent noise levels of before/after two-layer low noise pavement implementation for the roadside during the daytime are 65.355 dB and 63.520 dB and during the nighttime are 62.463 dB and 59.088 dB. The equivalent noise levels for the apartment rooftop during daytime are 57.301 dB and 59.088 dB and during the nighttime are 54.616 dB and 52.464 dB. Also two-layer low noise pavement decreased the noise reduction effects estimated with the statistical method as the Anderson-Darling test for the roadside during the daytime by around 66.68% and decreased noise reduction effects on the roadside during the nighttime by 0.70%. Moreover it reduced noise reduction effects in the apartment rooftop during the daytime and nighttime by 0% and 96.32%, respectively. CONCLUSIONS : Based on the result of this study, two-layer low noise pavement can positively affect noise reduction during both the daytime and nighttime according to the results of estimating the equivalent noise levels and the Anderson-Darling test.

• Management Science and Financial Engineering
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• 제16권3호
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• pp.49-70
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• 2010

Customer population management models can be classified into three categories: the first category includes the models that analyze the customer population at cohort level; the second one deals with the customer population at aggregate level; the third one has interest in the interactions among the customer populations in the competitive market. Our study proposes a model that can analyze the dynamics of customer population in consumer-durables market at aggregate level. The dynamics of customer population includes the retention curves from the purchase or at a specific duration time, the duration time expectancy at a specific duration time, and customer population growth or decline including net replacement rate, intrinsic rate of increase, and the generation time of customer population. For this study, we adopt mathematical ecology models, redefine them, and restructure interdisciplinary models to analyze the dynamics of customer population at aggregate level. We use the data of previous research on dynamic customer population management at cohort level to compare its results with those of ours and to demonstrate the useful analytical effects which the precious research cannot provide for marketers.

• 한국수학교육학회지시리즈A:수학교육
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• 제51권4호
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• pp.429-453
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• 2012

The purpose of the study were to analyze teaching models of arithmetic operations of integers in Korean middle school mathematics textbooks of the first grade and Americans', from which we compare and analyze standards for choice of models of middle school teachers and preservice mathematics teachers. We also analyze the effect of the choice of teaching models for students to understand and appreciate number systems as a coherent body of knowledge. On the basis of that, we would like to find the best model to help students understand and reason the process of formulate the arithmetic operations of natural numbers and integers into the operation of the real number system. Furthermore, we help these series of the study to be applied effectively in the middle school mathematics class in Korea.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.353-359
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• 2008

Somatotype is a very important factor for the comfortable and safe work environments. Many researches are trying to find the characteristics of somatotype according to age. Thus, the main objective of this study is to analyze somatotype of male residents in Seoul. The data used in this study included 267 men subjects who are living in Seoul. In order to analyze a detailed somatotype of citizens, age groups are divided into six groups. In order to compare and analyze data, Coefficient of Variance, Cronbach's Alpha, $R\ddot{o}hrer$ Index and Drop Value were used in this study. The results of this study can be applied to the comfortable and safe work environments for workers.

• 반도체디스플레이기술학회지
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• 제21권3호
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• pp.7-11
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• 2022

Object detection technology is one of the main research topics in the field of computer vision and has established itself as an essential base technology for implementing various vision systems. Recent DNN (Deep Neural Networks)-based algorithms achieve much higher recognition accuracy than traditional algorithms. However, it is well-known that the DNN model inference operation requires a relatively high computational power. In this paper, we analyze the inference time complexity of the state-of-the-art object detection architecture Yolov7 in various environments. Specifically, we compare and analyze the time complexity of four types of the Yolov7 model, YOLOv7-tiny, YOLOv7, YOLOv7-X, and YOLOv7-E6 when performing inference operations using CPU and GPU. Furthermore, we analyze the time complexity variation when inferring the same models using the Pytorch framework and the Onnxruntime engine.

• 대한지역사회영양학회지
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• 제28권1호
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• pp.11-23
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• 2023

Objectives: This study aimed to determine the nutritional status of residents, to examine the perception and needs of community nutrition care service, and to compare and analyze the results of females and males living in Daejeon, Korea. Methods: The subjects were 592 adults and elderly (278 men and 314 women) residents of Daejeon. The dietary quality was assessed using the nutrition quotient (NQ), and data of the perception and needs for community nutrition care service were obtained by a questionnaire survey. Descriptive analysis was applied to analyze the demographic characteristics, perception and needs of the respondents, and independent t-test and chi-square test were performed to analyze and compare the differences between female and male participants. Results: A nutritional status that required monitoring was established in 78.9% of the respondents in this study. The balance factor (29.1 points) was much lower than the national average. In the diversity factor, the NQ score of the female group was 47.6 points, which was 8 points lower than that of males; the NQ grade was 43.9%, showing a significant difference between females and males (P < 0.001). The respondents answered that those who needed community nutrition care services were residents experiencing health care difficulties. Additionally, dietitians (35.6%) were pointed out as the most suitable service providers. The most important factor of community nutrition care service operation was securing the budget (47.0%). Conclusions: The results of the present study show that Daejeon residents need overall nutrition support, and a demand for community nutrition care services exists. Our findings provide basic data and can serve as a foundation for the development and establishment of a community nutrition care service model.

• 지적과 국토정보
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• 제49권2호
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• pp.169-185
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• 2019

기존의 위성을 활용한 영상과 항공사진은 광활한 지역의 자료를 제공하는 장점이 있지만, 특정 지역의 자료를 원하는 시점에 촬영하여 가공하는 것의 한계와 짧은 주기의 반복적인 촬영이라는 어려운 측면이 있다. 이와 같은 단점을 극복하기 위한 많은 신기술이 개발되면서 지적정보 구축방법은 빠르게 변화하고 있다. 특히 UAV를 이용하여 신속하고 정확하게 지적정보를 구축하는 무인항공측량이 지적정보 취득기술로 관심도가 높아졌다. 따라서 본 연구에서는 UAV를 이용하여 지적측량 대상 지역의 지적측량 업무 적용 방안을 제시하고자 하였다. 이를 위해 관측지역별 제작된 고해상도 영상의 정확도를 비교.분석해 보고, 검증된 영상과 지적 관련 자료를 활용해 기존 지적업무에 적용하고자 하였다. 그리고 지적측량 관련 법률 규정 현황과 UAV의 기술적 특성 등을 분석해 지적측량에 활용 가능성을 분석해 보고 이를 기초로 도입을 위한 기술적, 법제도적 개선 방안을 제시하고자 한다.