• 제목/요약/키워드: Multiple-Regression Analysis

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보행자 전용도로의 이용자 경관만족 요인분석 -분당 신도시를 중심으로- (The Analysis of User's Degree on Landscape Satisfaction Factors for Pedestrian Road -Case Study of Bun-Dang New Town-)

  • 김대현
    • 한국환경복원기술학회지
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    • 제4권2호
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    • pp.1-10
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    • 2001
  • The purpose of this study was to investigate factors and variables which have significant effects on landscape satisfaction of urban pedestrian road in Bun-dang new town and to suggest basic information for urban pedestrian road design. These works consist of two phase. First, we tested the Hye-Cheon college students' degree of landscape satisfaction for 37 spots of urban pedestrian road and then selected 10 sports slide by the Sturges' formula. Second, we analysed factors and variables on landscape satisfaction of urban pedestrian road using the semantic differential scale method and then processed using descriptive analysis, factor analysis and multiple linear regression analysis. The major findings of this study can be summarized as follows; 1) The difference of landscape adjectives between the highest score of landscape satisfaction slide and the lowest score landscape satisfaction slide were diversity of vegetation, plenty of the shade of a tree, naturalness and cleanness. 2) Diversity of vegetation, width of road, freedom of danger and diversity of environment can be significant variables of major effects on landscape satisfaction of urban pedestrian road by using the multiple linear regression analysis. 3) Factors covering the landscape satisfaction of urban pedestrian road have been found to be Environment of urban pedestrian road and Constitution of urban pedestrian road. By using the Varimaxs' rotation factor analysis for the number of factors' cumulative percentage has been obtained as 64%. 4) Environment of urban pedestrian road and Constitution of urban pedestrian road can be significant factors of major effects on landscape satisfaction of urban pedestrian road by using the multiple linear regression analysis. In conclusion, the landscape satisfaction factors and variables of urban pedestrian road need to be considered in plan or design the urban pedestrian road.

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Submicron 부유분진의 화학적 조성 및 분포에 관한 연구 (Studies on the Chemical Compositions and Distributions of Ambient Sumicron Aerosols)

  • 황인조;김동술
    • 한국대기환경학회지
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    • 제14권1호
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    • pp.11-23
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    • 1998
  • The purpose of this study was to survey chemical distribution of inorganic elements and ions in the submicron particles, to characterize qualitatively emitting sources by factor analysis, and finally to reveal existing patterns in terms of chemical compounds by a stepwise multiple regression analysis. Total of 141 samples were collected by a cascade impactor from 1989 to1996. Fifteen chemical species (Al, Ba, Cd, K, Pb, Cu, Fe, Ni, $Cl^-, NO_3^-, SO_4^{2-}, K^+, Mg^{2+}, Ca^{2+}, and Na^+$) were characterized by AAS and IC. The study showed that average seasonal levels of submicron particulate matters $(d_p<0.43 \mum)$ were 18.7 $\mug/m^3$ in spring, 15.5 $\mug/m^3$ in summer, 15.7 $\mug/m^3$ in fall, and 24.5 $\mug/m^3$ in winter, respectively. All of the anion concentrations in the particle were highest in the winter season. By applying a factor analysis, 5 source patterns were qualitatively obtained, such as sulfate related source, nitrate related source, oil burning source, calcium related source, and coal combustion source. Finally, when applying a stepwise multiple regression analysis, the results clearly showed that $Na^+ and Ca^{2+}, K^+ and Ca^{2+}, NO_3^-$ and relative humidity, $Cl^-$ and ambient temperature, $Ca^{2+} and Cl^-, Mg^{2+} and SO_4^{2-}, Na^+ and NO_3^-, and Ca^{2+} and NO_3^-$, respectively, are negatively contributed to each other. As a result of those statistical analysis, we could suggest that some chemical compounds in the submicron particles such as$NaNO_3, MgSO_4, Ca(NO_3)_2, and CaCl_2$ may not exist on the filter as final composing products; however, other compounds may possibly exist in the form of $Mg(NO_3)_2, CaSO_4, Na_2SO_4, K_2SO_4, MgCl_2, NaCl, and KCl$. Thus, it must be necessary to identify differences between the results of above statistical analysis and of the real world by laboratory experiments.

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대학생의 직업희망과 진로태도성숙도 및 진로결정자기효능감의 관계 (Relations among Work Hope, Career Attitude Maturity, and Career Decision-Making Self-Efficacy in Korean College Students)

  • 김현미
    • 디지털융복합연구
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    • 제16권3호
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    • pp.497-504
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    • 2018
  • 본 연구의 목적은 대학생의 직업희망과 진로태도성숙도 및 진로결정자기효능감과 관계를 알아보기 위해 수행되었다. 이를 위해 수도권과 영남, 호남, 강원, 충청권에 소재한 8개 대학교에서 수집된 299명의 자료를 사용하여 상관분석과 변량분석, 다중회귀분석을 실시하였다. 직업희망과 진로변인들 간의 상관분석 결과, 각 하위요인 간에는 r=.64~.73의 정적상관이 나타났다. 성별, 학년, 전공계열 따른 직업희망의 차이를 살펴보기 위해 변량분석을 실시한 결과, 성별과 학년에 따른 차이는 나타나지 않았지만 전공계열별로는 유의미한 차이를 보였다. 또한 다중회귀분석을 실시한 결과, 진로태도성숙도에 영향을 미치는 직업희망은 경로사고였으며 진로결정자기효능감에서는 경로사고, 주도사고, 목표가 영향을 미치는 것으로 확인되었다. 이러한 결과를 토대로 대학생의 직업희망 척도를 활용한 본 연구의 제한점과 의의를 논의하였다.

존별 특성을 반영한 교통사고밀도 모형 - 청주시 사례를 중심으로 - (Traffic Accident Density Models Reflecting the Characteristics of the Traffic Analysis Zone in Cheongju)

  • 김경용;백태헌;임진강;박병호
    • 한국도로학회논문집
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    • 제17권6호
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    • pp.75-83
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    • 2015
  • PURPOSES : This study deals with the traffic accidents classified by the traffic analysis zone. The purpose is to develop the accident density models by using zonal traffic and socioeconomic data. METHODS : The traffic accident density models are developed through multiple linear regression analysis. In this study, three multiple linear models were developed. The dependent variable was traffic accident density, which is a measure of the relative distribution of traffic accidents. The independent variables were various traffic and socioeconomic variables. CONCLUSIONS : Three traffic accident density models were developed, and all models were statistically significant. Road length, trip production volume, intersections, van ratio, and number of vehicles per person in the transportation-based model were analyzed to be positive to the accident. Residential and commercial area ratio and transportation vulnerability ratio obtained using the socioeconomic-based model were found to affect the accident. The major arterial road ratio, trip production volume, intersection, van ratio, commercial ratio, and number of companies in the integrated model were also found to be related to the accident.

청소년의 가족기능, 충동성, 스트레스 수준이 집단따돌림 유형에 미치는 영향 (Effects of Family Function, Impulsive Behavior and Stress on Bullying Types of Adolescents)

  • 이혜순
    • 한국콘텐츠학회논문지
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    • 제14권2호
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    • pp.319-329
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    • 2014
  • 본 연구는 청소년의 가족기능, 충동성, 스트레스가 집단따돌림 유형에 미치는 영향을 파악하기 위한 서술적 조사연구이다. 연구대상은 중 고등학생 627명으로, 수집된 자료는 SPSS 18.0 program을 사용하여 평균과 표준편차, t-test, Pearson's Correlation Coefficient 및 stepwise multiple regression analysis으로 분석하였다. 연구결과는 다음과 같다. 집단따돌림 유형(가해 및 피해)은 가족기능, 충동성, 스트레스와 상관관계가 있는 것으로 나타났다. 집단따돌림 가해에 영향을 미치는 요인은 가족기능의 하부요인에서 정서적 반응성, 충동성의 하부영역에서 무계획 충동성, 스트레스의 하부요인에서 친구관련 스트레스, 일반적 특성에서 음주경험(있음), 부모 우울문제 경험(있음)로 확인되었으며, 34.1%의 설명력을 나타내었다. 집단따돌림 피해에 영향을 미치는 요인은 가족기능의 하부요인에서 의사소통, 충동성의 하부영역에서 운동 충동성, 스트레스의 하부요인에서 친구관련 스트레스, 일반적 특성에서 성별(남학생), 학년(중학생)으로 확인되었으며, 30.9%의 설명력을 나타내었다. 결론적으로 본 연구는 청소년의 집단따돌림 유형(가해 및 피해)에 가족기능, 충동성, 스트레스의 역할을 실증적으로 확인하였다는 점과 청소년의 집단따돌림 유형에 따른 중재방안의 기초 자료를 제공하였다는 점에서 의의를 찾을 수 있다.

창의적 정보과학교육이 학부모와 초등학생의 정보과학교육에 관한 가치 인식에 미치는 영향 분석 (An Analysis of the Elementary Parent and Students' Perceptions of Value on Computer Science after Creative Computer Science Education)

  • 윤일규;김자미;이원규
    • 컴퓨터교육학회논문지
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    • 제18권5호
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    • pp.15-24
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    • 2015
  • 본 연구는 초등학생을 대상으로 하는 창의적 정보과학교육 이후, 학부모와 학생의 정보과학교육에 대한 가치에 영향을 미치는 변인을 분석하기 위해 다중회귀분석(multiple regression)을 실시하였다. 정보교과에서는 많은 연구들은 학생의 교과 내용에 대한 효과에 집중하고 있으며, 학부모에 대한 인식 연구는 거의 진행되지 않았다. 이에 본 연구는 학부모들이 인식하는 정보과학교육에 대한 가치에 집중하였으며, 실질적으로 학부모들이 정보교과 학습 지지에 관련 있는 정보과학교육에 대한 가치변인에 영향을 미치는 변인을 분석하였다. 따라서 학부모와 학생의 인식 차이 검증을 실시하지 않았고, 각 집단이 인식하는 가치에 영향을 미치는 변인을 다중회귀분석으로 진행하여 보다 구체적인 영향력을 산출하였다는 점에서 의의를 찾을 수 있다. 분석결과, 학부모가 인식하는 학생의 정보과학교육에 대한 가치 인식에 가장 큰 영향을 미치는 변인은 흥미 및 만족도 변인이며, 학생들은 자기효능감의 변인이 정보과학교육에 대한 가치 인식에 가장 큰 영향을 미치고 있었다.

VARIANCE ESTIMATION OF ERROR IN THE REGRESSION MODEL AT A POINT

  • Oh, Jong-Chul
    • Journal of applied mathematics & informatics
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    • 제13권1_2호
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    • pp.501-508
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    • 2003
  • Although the estimate of regression function is important, some have focused the variance estimation of error term in regression model. Different variance estimators perform well under different conditions. In many practical situations, it is rather hard to assess which conditions are approximately satisfied so as to identify the best variance estimator for the given data. In this article, we suggest SHM estimator compared to LS estimator, which is common estimator using in parametric multiple regression analysis. Moreover, a combined estimator of variance, VEM, is suggested. In the simulation study it is shown that VEM performs well in practice.

Patch loading resistance prediction of plate girders with multiple longitudinal stiffeners using machine learning

  • Carlos Graciano;Ahmet Emin Kurtoglu;Balazs Kovesdi;Euro Casanova
    • Steel and Composite Structures
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    • 제49권4호
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    • pp.419-430
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    • 2023
  • This paper is aimed at investigating the effect of multiple longitudinal stiffeners on the patch loading resistance of slender steel plate girders. Firstly, a numerical study is conducted through geometrically and materially nonlinear analysis with imperfections included (GMNIA), the model is validated with experimental results taken from the literature. The structural responses of girders with multiple longitudinal stiffeners are compared to the one of girders with a single longitudinal stiffener. Thereafter, a patch loading resistance model is developed through machine learning (ML) using symbolic regression (SR). An extensive numerical dataset covering a wide range of bridge girder geometries is employed to fit the resistance model using SR. Finally, the performance of the SR prediction model is evaluated by comparison of the resistances predicted using available formulae from the literature.

성과 향상을 위한 호텔 레스토랑 SCM 활동 측정에 관한 연구 (Research for Determining Hotel Restaurant SCM Activities to Improve Performance)

  • 강석우;박지양
    • 동아시아식생활학회지
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    • 제17권6호
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    • pp.963-971
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    • 2007
  • This research aimed to determine the relationship between hotel restaurants' SCM activities and their results. The samples are included exclusive high-end hotels located in the seoul area. To analyze the data, frequency analysis, reliability analysis, factor analysis, and regression analysis were applied. Multiple regression analysis showed that SCM activities (${\beta}$=.342, p<.000), information sharing (${\beta}$=.136, p<.006), and cooperative activities (${\beta}$=.120, p<.015) had a significant impact on financial performance. The explanatory power of this model was 14%, and there was statistical significance in the regression model. SCM activities(${\beta}$=.221, p<.000), information sharing (${\beta}$=.475, p<.000), and cooperative activities (${\beta}$=.172, p<.000) also had a significant impact on non-financial performance, and the explanatory power of this model was 29%, with statistical significance in the regression model.

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서비스 유통 관점에서 아동복지기관 서비스질의 전달에 대한 인식과 이용자 만족도에 미치는 영향 (Effects of Child Welfare Service Quality Delivery and Customer Satisfaction from the Service Distribution Perspective)

  • 엄경호;김진우
    • 유통과학연구
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    • 제13권8호
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    • pp.91-96
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    • 2015
  • Purpose - This study reviews the delivery of child welfare service quality and examines how the dimensions of the variables of customer satisfaction impact the results from a service distribution perspective. This study differs from existing research since it proposes that a recognized level of child welfare service quality is necessary to achieve customer satisfaction from the perspective of service distribution. Research design, data, and methodology - This study explores child welfare service quality factors that affect customer satisfaction. The study examines and analyzes demographic variables, service quality dimensions, and the causal relationships between child welfare service quality and customer satisfaction. Data from 300 child welfare cases were collected from organizations in Korea in the areas of Busan and Gyeongsangnamdo. The methods of analysis are as follow. First, using descriptive analysis frequency, the percentages were evaluated to assess the demographic variables. Second, Cronbach's α was used to test reliability and to evaluate the internal consistency of the measuring of items. Third, multiple regression analysis was conducted to find out how much the independent variable can affect customer satisfaction. Results - Five factors of child welfare service quality were identified in three categories: process quality (assurance, empathy), results quality (reliability, caring), and physical environment quality (tangibles). There were significant differences among the effects of the child welfare service quality factors on customer satisfaction. A multiple regression analysis was done with process quality (assurance, empathy), results quality (reliability, caring) and physical environment quality (tangibles) to test the hypothesis: assurance (t=2.434, p<0.05), empathy (t=3.677, p<0.001), reliability (t=3.271, p<0.05), caring (t=4.380, p<0.000), and tangibles (t=3.654, p<0.01) had a positive influence on child welfare service quality from a service distribution perspective. Therefore, hypotheses 1, 2, 3, 4, and 5 were supported. In addition, multiple regression analysis on the effects of the variables showed that caring (β=0.273), empathy (β=0.246), tangibles (β=0.265), reliability (β=0.152), and assurance (β=0.131) all had a positive and strong influence on child welfare service quality from a service distribution perspective. Therefore, all child welfare service quality categories (process, results and physical environment quality) were positively statistically significant. Conclusion - In this study, the main findings can be summarized as follows. First, the quality of service of child welfare consists of three dimensions of quality: process quality, results quality, and physical environment quality. The results of the multiple regression analysis also showed that caring and reliability were confirmed as more meaningful variables by the increasing loading factors. Second, the family members involved in child welfare proposed caring as the most important variable among the dimensions of service quality. Third, the results of the hypothesis testing using regression showed that all child welfare service quality factors had a positive impact on customer satisfaction. The results of the study could provide useful information to help increase the effectiveness of delivery strategies for child welfare service quality from a service distribution perspective.