• International Journal of Computer Science & Network Security
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• 제24권2호
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• pp.31-42
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• 2024

Different industries mostly rely on quality certification for promoting their products or brands. Although getting quality certification, specifically by human experts is a tough job to do. But the field of machine learning play a vital role in every aspect of life, if we talk about quality certification, machine learning is having a lot of applications concerning, assigning and assessing quality certifications to different products on a macro level. Like other brands, wine is also having different brands. In order to ensure the quality of wine, machine learning plays an important role. In this research, we use two datasets that are publicly available on the "UC Irvine machine learning repository", for predicting the wine quality. Datasets that we have opted for our experimental research study were comprised of white wine and red wine datasets, there are 1599 records for red wine and 4898 records for white wine datasets. The research study was twofold. First, we have used a technique called backward elimination in order to find out the dependency of the dependent variable on the independent variable and predict the dependent variable, the technique is useful for predicting which independent variable has maximum probability for improving the wine quality. Second, we used a robust machine learning algorithm known as "XGBoost" for efficient prediction of wine quality. We evaluate our model on the basis of error measures, root mean square error, mean absolute error, R2 error and mean square error. We have compared the results generated by "XGBoost" with the other state-of-the-art machine learning techniques, experimental results have showed, "XGBoost" outperform as compared to other state of the art machine learning techniques.

• 한국컴퓨터정보학회논문지
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• 제25권2호
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• pp.149-156
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• 2020

본 연구의 목적은 직무스트레스와 심리적 소진과의 관계에 있어 사회적 지지의 조절효과와 매개효과를 실증 분석한 결과를 제시하는 데에 있다. 선행연구를 바탕으로 직무스트레스를 독립변인, 사회적 지지를 조절변인과 매개변인, 심리적 소진을 종속변인으로 하여 연구모형을 설정하고 그 관계와 효과를 검증하였다. 이를 위해 미술치료사를 대상으로 200부의 설문지를 배포하여 최종 150부를 실증분석에 이용하였다. 본 연구의 결과는 다음과 같다. 첫째, 개인 환경적 요인(경력, 고용형태, 근무시간)에 따른 직무스트레스, 심리적 소진, 사회적 지지에 차이를 보이지 않는 것으로 나타났다. 둘째, 직무스트레스, 심리적 소진, 사회적 지지는 변인 간의 높은 상관관계를 보였다. 셋째, 미술치료사의 직무스트레스와 심리적 소진과의 관계에서 사회적 지지는 조절효과를 가지는 것으로 확인되었다. 넷째, 미술치료사의 직무스트레스와 심리적 소진과의 관계에서 사회적 지지는 매개효과를 가지는 것으로 확인되었다.

• Journal of the Korean Data and Information Science Society
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• 제17권2호
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• pp.543-557
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• 2006

This paper is concerned with the applicability of the chi-square approximation to the six disparity statistics: the Pearson chi-square, the generalized likelihood ratio, the power divergence, the blended weight chi-square, the blended weight Hellinger distance, and the negative exponential disparity statistic. Three dimensional contingency tables of small and moderate sample sizes are generated to be fitted to all possible hierarchical log-linear models: the completely independent model, the conditionally independent model, the partial association models, and the model with one variable independent of the other two. For models with direct solutions of expected cell counts, point estimates and confidence intervals of the 90 and 95 percentage points of six statistics are explored. For model without direct solutions, the empirical significant levels and the empirical powers of six statistics to test the significance of the three factor interaction are computed and compared.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.91.2-91
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• 2002

$\textbullet$ Machine tools $\textbullet$ Thermal distortion compensation $\textbullet$ Independent component analysis $\textbullet$ Temperature variable reduction $\textbullet$ Thermal distortion modeling $\textbullet$ Hardware Implementation $\textbullet$ Experiments

• 한국의류산업학회지
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• 제13권6호
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• pp.827-837
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• 2011

The purpose of this study was to observe premium handbag users who are 20 to 30 year old of age, to determine purchase behavior and design preference of handbags by lifestyle and age variable to help market segmentation. A survey instrument was used. A sample was selected by quota sampling method from 20 to 30 aged Korean women, and reliable 538 data were analyzed by SPSS. Cluster type towards lifestyle and age were independent variable. There are two types of lifestyle clusters toward luxury handbags; Strongly favored and weakly favored group toward luxury handbags. Strongly favored group of luxury goods considered more brand, country of origin, and trend, while young people considered more new arrival of design in purchase of products. Preferred design type of hand bag was statistically associated with age variable. 20s consumers preferred shopper bag style and big size of handbags. Leather was preferred by the group of the strongly favored luxury goods. Through this research finding, we hope handbag brand market segmentation will be based on lifestyle and age variable to reflect customer's demand.

• Asia pacific journal of information systems
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• 제32권2호
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• pp.249-274
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• 2022

This study is to focuses on users' attitudes toward augmented reality games. Based on the Technology Acceptance Model (TAM) and Flow theory, continuous usage intention was set as a dependent variable, and immersion was set as a mediating variable. As independent variables, spatial presence, perceived interactivity, perceived pleasure, and sickness were set. Besides, this study strived to compare and analyze Korean and Chinese Data. The results of this study were as follows. First of all, Korean users significantly affected spatial presence, perceived pleasure, and immersion. Spatial presence and perceived pleasure had also mediated effects on continuous usage intention through immersion. However, perceived interactivity and sickness did not affect immersion and even no mediating effect to continuous usage intention. In the case of Chinese users, spatial presence, perceived interactivity, and perceived pleasure were grouped into one variable. This variable influenced immersion and also had mediated effect on continuous usage intention. However, sickness, like Korean users, did not affect the set path. This study had implications for analyzing user perspective using immersion, a significant variable in previous research. In addition, this study found similarities and characteristics through a comparative analysis between Korean and Chinese users indirectly.

• Journal of applied mathematics & informatics
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• 제31권1_2호
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• pp.147-154
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• 2013

We analyze queueing model with priority scheduling by supplementary variable method. Customers are classified into two types (type-1 and type-2 ) according to their characteristics. Customers of each type arrive by independent Poisson processes, and all customers regardless of type have same general service time. The service order of each type is determined by the queue length of type-1 buffer. If the queue length of type-1 customer exceeds a threshold L, the service priority is given to the type-1 customer. Otherwise, the service priority is given to type-2 customer. Method of supplementary variable by remaining service time gives us information for queue length of two buffers. That is, we derive the differential difference equations for our queueing system. We obtain joint probability generating function for two queue lengths and the remaining service time. Also, the mean queue length of each buffer is derived.

• 한국컴퓨터정보학회논문지
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• 제22권9호
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• pp.179-185
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• 2017

The purpose of this study was to investigate the relationships between occupational identity, occupation satisfaction, and self-efficacy of care workers in care hospitals and to draw implications for improving the quality of care services. In order to accomplish the purpose of this study, the occupational identity of care workers in care hospitals as an independent variable, occupation satisfaction as a dependent variable of occupational identity, and self-efficacy as a moderating variable were selected. The causal relationships between occupational identity and occupation satisfaction and the moderating effect of self-efficacy were analyzed. As a result of the analysis, the occupational identity of care workers in care hospitals showed significant effects on occupation satisfaction and job commitment. Also, the effects of occupational identity on occupation satisfaction and job commitment differ depending on self-efficacy, which means that moderating effects of self-efficacy are significant. Based on this analytical results, the theoretical and policy implications of this study were suggested, and the directions and limitations of this study were suggested.

• 한국생산제조학회지
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• 제22권3호
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• pp.394-401
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• 2013

A new Rockwell hardness (HRC) model using a volumetric parameter by a least square and fractal interpolation method is suggested. The results are also investigated in comparison to real measured hardness data. For this purpose, the measurement of an indented volume is performed using a confocal laser scanning microscope (CLSM), and the captured height encoded image (HEI) is used as an original surface for the calculation of the indented volume. After configuring the surface, the constructed volume is calculated and used as an independent variable for HRC hardness modeling. The hardness model is established using an experimental modeling technique involving a least square algorithm and fractal interpolating model, and this suggested model can be used to reliably predict the Rockwell hardness. These techniques can also be applied to the modeling of the Brinnell and Vickers hardnesses using a volumetric variable.

• 한국산업정보학회논문지
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• 제6권3호
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• pp.35-43
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• 2001

이 논문에서는 WBI(Web-Based Instruction) 시스템의 영역 독립적인 학습자 모듈을 구축하는데 있어 핵심이 되는 요소를 영역 전문가가 쉽게 입력할 수 있도록 하기 위하여 퍼지이론의 언어 변수 개념을 도입한 학습자 응답 진단 공식을 제안한다. 또한 학습자의 인지 상태를 추론하는 규칙을 영역 전문가가 언어변수를 입력하여 구축할 수 있도록 하고 이 규칙을 이용하여 학습자의 인지 상태를 추론할 수 있도록 학습자 모듈을 설계한다.