• Title/Summary/Keyword: Relationship of models

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The Chemistry Teachers' Perceptions and Interpretations about Three Acid-Base Models (세 가지 산-염기 모델에 대한 화학교사들의 인식과 해석)

  • Kim, Sungki;Choi, Hee;Park, Chul-Yong;Paik, Seoung-Hey
    • Journal of the Korean Chemical Society
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    • v.63 no.1
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    • pp.56-65
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    • 2019
  • This study investigated the perceptions of the relationship among the three acid-base models of chemistry teachers. In addition, we examined how the perception of the relationship between models affected on the interpretation of concepts in each model. To investigate teachers' perceptions and interpretations, a questionnaire and interviews were conducted for 24 chemistry teachers. As results, most of the chemistry teachers recognized the three models as cumulative extension relationships. The perceptions were related to the contents of textbooks. The perception of the relationship of these models influenced on interpretations of the models' acid-base concept. In this study, we suggested that science teachers need to be aware of diverse models' roles.

A New Variable Selection Method Based on Mutual Information Maximization by Replacing Collinear Variables for Nonlinear Quantitative Structure-Property Relationship Models

  • Ghasemi, Jahan B.;Zolfonoun, Ehsan
    • Bulletin of the Korean Chemical Society
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    • v.33 no.5
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    • pp.1527-1535
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    • 2012
  • Selection of the most informative molecular descriptors from the original data set is a key step for development of quantitative structure activity/property relationship models. Recently, mutual information (MI) has gained increasing attention in feature selection problems. This paper presents an effective mutual information-based feature selection approach, named mutual information maximization by replacing collinear variables (MIMRCV), for nonlinear quantitative structure-property relationship models. The proposed variable selection method was applied to three different QSPR datasets, soil degradation half-life of 47 organophosphorus pesticides, GC-MS retention times of 85 volatile organic compounds, and water-to-micellar cetyltrimethylammonium bromide partition coefficients of 62 organic compounds.The obtained results revealed that using MIMRCV as feature selection method improves the predictive quality of the developed models compared to conventional MI based variable selection algorithms.

The Study of Body Characteristics and Fashion in Fragrance Advertising (향수 광고에서 보여지는 신체 이미지 및 패션 연구)

  • 권기영
    • Journal of the Korean Home Economics Association
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    • v.41 no.11
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    • pp.35-48
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    • 2003
  • The purpose of this study is to investigate ideal body image and clothing style through the analysis of models portrayed in fragrance advertisement that is the representative goods showing the fashion brand image. For this study, 120 perfume advertisements appeared in GQ and Vogue magazines issued in 2002 were selected. The models' characteristics portrayed in advertisement are categorized with role relationship, race, body exposure and clothing styles. The results are as follows. 1. Fragrance advertisements most commonly depict a single model portraying narcissism, and later then most common are advertisements both male and female model in a sexual relationship. 2. The analysis of models' race shows racism toward Asian models and Afro- American models. White models are main characters in fragrance advertisements more often than other races, and in mixed-ethnic ads, whites typically outnumbered minorities. This shows currently aesthetic stereotypes, that is, white ideology still exists. 3. The results of models' body exposure are showing nudism with partially clad or nude. This shows the eroticism of male and female. 4. The highest portion of clothing style appeared in fragrance advertisement were casual wear for male model and dressy formal wear for female models, which respects current fashion trends.

Effects of Work Attitude of Fashion Models on Job Satisfaction and Turnover Intention (패션모델의 직무스타일이 직무만족도 및 이직의도에 미치는 영향)

  • Lee, Jung-A;Kim, Young-Sam
    • Journal of the Korean Society of Costume
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    • v.66 no.3
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    • pp.147-161
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    • 2016
  • This study analyzed the effects of job style on job satisfaction and turnover intention of fashion models, and the difference in the job style, job satisfaction and turnover intention by model activities period. Data was collected by surveying fashion models with more than 10 modeling experiences, and 230 responses were used in the data analysis. The results of were as follows: First, the job style of fashion models were classified into professional ability type, social relationship-focused type, future-oriented type and body-boasting type. Job satisfaction was classified into satisfaction with working conditions, satisfaction with model activities, and satisfaction with relationships. Turnover intention was classified into intention to change jobs, and intention to quit modeling. Second, being a professional ability type had a negative effect on satisfaction with working conditions, whereas being a future-oriented type had a positive effect on it. The professional ability type and social relationship-focused type had a positive effect on satisfaction with model activities, and the social relationship-focused type had a positive effect on satisfaction with relationships. Third, the future-oriented type and body-boasting type had a negative effect on the intention to change jobs. The social relationship-focused type, future-oriented type and body-boasting type had a negative effect on the intention to quit modeling. Fourth, there were significant differences in the professional ability type, human relationship-focused type, body-boasting type, intention to change jobs and intention to quit modeling by model activities period. Therefore, it is necessary for domestic fashion models to have the appropriate attitude to develop features and competency required for modeling projects and if improvements are made to enhance job satisfaction of fashion models, the fashion modeling industry is expected to make further developments.

Post-peak response analysis of SFRC columns including spalling and buckling

  • Dhakal, Rajesh P.
    • Structural Engineering and Mechanics
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    • v.22 no.3
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    • pp.311-330
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    • 2006
  • Standard compression tests of steel fiber reinforced concrete (SFRC) cylinders are conducted to formulate compressive stress versus compressive strain relationship of SFRC. Axial pullout tests of SFRC specimens are also conducted to explore its tensile stress strain relationship. Cover concrete spalling and reinforcement buckling models developed originally for normal reinforced concrete are modified to extend their application to SFRC. Thus obtained monotonic material models of concrete and reinforcing bars in SFRC members are combined with unloading/reloading loops used in the cyclic models of concrete and reinforcing bars in normal reinforced concrete. The resulting path-dependent cyclic material models are then incorporated in a finite-element based fiber analysis program. The applicability of these models at member level is verified by simulating cyclic lateral loading tests of SFRC columns under constant axial compression. The analysis using the proposed SFRC models yield results that are much closer to the experimental results than the analytical results obtained using the normal reinforced concrete models are.

Development of Integrated Model for Accelerated Life Test Using Linkage Parameter (연계모수를 이용한 가속수명시험 통합모형의 개발)

  • Choi, Sung-Woon
    • Journal of the Korea Safety Management & Science
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    • v.9 no.5
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    • pp.43-48
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    • 2007
  • This paper is to present linkage parameter to integrate statistical models and physical models for accelerated life test. Statistical models represent the relationship of probability distribution and life. Physical models show the relationship of life and stress. Moreover, this study proposes the four steps for construction of integrated models for accelerated life test using linkage parameter. Finally, this paper develops new integrated models such as extreme value distribution-general Eyring, linearly increasing failure rate function-general Eyring, etc., and estimates various reliability measures.

The Relationship between Clothing Involvement and Fashion Leadership of Fashion Models and College Women (패션모델과 여대생들의 의복관여와 유행선도력과의 관계)

  • Song, Jung-A
    • Fashion & Textile Research Journal
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    • v.3 no.4
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    • pp.323-329
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    • 2001
  • The purpose of this study was to identify the relationship between clothing involvement and fashion leadership of fashion models and college women. For this study, 113 fashion models and 265 female college students were analyzed. Factor analysis, Correlation, t-test and Regression analysis were used in data analyses. Clothing involvement was factor analyzed resulting five factors such as interest, pleasure, fashionability, risk perception and symbolism. Three clothing involvement factors had highly positive relations with total clothing involvement. Interest, pleasure and fashionability factors were related with each other: Fashionability and interest factors had an effect on fashion opinion-leadership and fashion innovation. Significant differences were found between fashion models and female college students in regard to clothing involvement and fashion leadership. Fashion models and female college students differed significantly in clothing interest and fashionability. Fashion models and female college students differed significantly in fashion opinion-leadership and fashion innovation. Fashion models were more fashion opinion leaders and fashion innovators than female college students.

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The Comparison of Olson's Circumplex Model and the Beavers' Systems Model in terms of the Relationship between Family Adaptability and Family Function (가족 적응력과 가족기능과의 관계 : Olson의 순환모델의 곡선성과 Beavers의 체계모 델의 선형성)

  • 장진경
    • Journal of Families and Better Life
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    • v.13 no.4
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    • pp.1-14
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    • 1995
  • Various theoretical models have developed io both a family research area and family therapy field on he basis of several family theories and social theories in order to understand the family life and its function. These theoretical models have give rise to provide not only a framework for family therapy bt also opportunities for the development of family studies. Regardless of the devotion of these theoretical models to a family therapy however some family therapy professions have suggested the disvergence between these models and practice because the models tend to confuse therapists in their actual practices Other family therapists on the other hand have claimed the convergence between these models and practice. One of the reasons for the issues of convergence and disvergence in the family therapy study would be that various theoretical models have different sometimes contradicatable definitions and explanations for same concept. Therefore the purpose of this paper is to investigate the extent of similarities and differences among these theoretical models of practice in a way of examining family models to compare Olson's circumplex model to the Beavers systems model. Both models were based on the general systems theory. This paper consists of the explanation of Olson's circumplex model and Beavers systems model in general respectively. Then it will investigate similarities and differences between these two models in terms of the relationship between family functioning and family adaptability.

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Estimating the Nature of Relationship of Entrepreneurship and Business Confidence on Youth Unemployment in the Philippines

  • CAMBA, Aileen L.
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.8
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    • pp.533-542
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    • 2020
  • This study estimates the nature of the relationship of entrepreneurship and business confidence on youth unemployment in the Philippines over the 2001-2017 period. The paper employed a range of cointegrating regression models, namely, autoregressive distributed lag (ARDL) bounds testing approach, Johansen-Juselius (JJ) and Engle-Granger (EG) cointegration models, dynamic OLS, fully modified OLS, and canonical cointegrating regression (CCR) estimation techniques. The Granger causality based on error correction model (ECM) was also performed to determine the causal link of entrepreneurship and business confidence on youth unemployment. The ARDL bounds testing approach, Johansen-Juselius (JJ) and Engle-Granger (EG) cointegration models confirmed the existence of long-run equilibrium relationship of entrepreneurship and business confidence on youth unemployment. The long-run coefficients from JJ and dynamic OLS show significant long-run and positive relationship of entrepreneurship and business confidence on youth unemployment. While results of the long-run coefficients from fully modified OLS and canonical cointegrating regression (CCR) found that only entrepreneurship has significant and positive relationship with youth unemployment in the long-run. The Granger causality based on error correction model (ECM) estimates show evidence of long-run causal relationship of entrepreneurship and business confidence on youth unemployment. In the short-run, increases in entrepreneurship and business confidence causes youth unemployment to decrease.

Comparison of Conceptual Models of XML Based on Extended Entity Relationship Model (확장된 개체 관계 모델 기반 XML의 개념적 모델 비교)

  • Kim, Young-Ung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.19 no.6
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    • pp.197-202
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    • 2019
  • XML has been established as a de facto standard for representing and exchanging documents, and has been widely used as a logical data model. Using XML as a logical database model, it requires a conceptual model for the semantics that XML has. However, the existing conceptual models, such as Entity Relationship models and UML, have been extended their concepts to express the specific characteristics of XML, but so far, there are no standard models. This paper compares the characteristics of the typical model of conceptual model of XML by Extended Entity Relationship model from the perspective of database field. For this, we propose the requirements that must be met for XML, and on the basis of these requirements, the approaches of each model are compared.