scholarly journals Quantifying Liver-Stomach Disharmony Pattern of Functional Dyspepsia Using Multidimensional Analysis Methods

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Zhongyu Huang ◽  
Zipan Lyu ◽  
Zhengkun Hou ◽  
Yuefeng Wu ◽  
Junqing Huang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Functional Dyspepsia ◽  
Theoretical Models ◽  
Factor Loading ◽  
Quantitative Model ◽  
Multidimensional Analysis ◽  
Validity And Reliability ◽  
Analysis Methods ◽  
Latent Traits ◽  
Pattern Quantification

Purpose. This study aims to develop and validate a quantitative model for measuring severity of a typical traditional Chinese medicine (TCM) pattern for functional dyspepsia (FD) using multidimensional analysis methods including confirmatory factor analysis (CFA) and multidimensional item response theory (MIRT). Methods. A scale and theoretical models were constructed according to the definition of pathogenesis about “liver-stomach disharmony” patterns of FD. With data collected from 502 patients in a cross-section study, the theoretical model was validated with CFA, and the related validity and reliability were evaluated in Amos 21.0. By the use of the MIRT paradigm, psychometric properties of the scale were estimated and evaluated for pattern quantification. Results. A scale consisting of 12 items was constructed detecting three latent traits of the pattern. The theoretical model was evaluated to be with adequate consistency with clinical data as RMSEA < 0.05, CFI = 0.94, and χ2/Df = 2.29. As the correlation between symptoms and related pattern factors evaluated to be with adequate factor loading, the instrument is of preliminary interpretation. Most precision of assessment could be achieved for patients with moderate severity of the pattern as shown in test information and standard error functions. Conclusions. An instrument with an interpretable conceptual framework was developed for pattern quantification in TCM clinical practice. By constructing and evaluating both psychological and physical effects in a multidimensional model of the TCM pattern of FD, the paradigm raised in this article provided a valuable reference for interpreting complex diseases and theories such as FD and TCM patterns.

Investigation on penetration model of shaped charge jet in water

2016 ◽  
Vol 30 (02) ◽  
pp. 1550268 ◽  
Author(s):  
Jinwei Shi ◽  
Xingbai Luo ◽  
Jinming Li ◽  
Jianwei Jiang
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
Model Simulation ◽  
Theoretical Models ◽  
Theoretical Research ◽  
Water Medium ◽  
Simulation Results ◽  
Jet Penetration ◽  
The Impact ◽  
Penetration Velocity

To analyze the process of jet penetration in water medium quantitatively, the properties of jet penetration spaced target with water interlayer were studied through test and numerical simulation. Two theoretical models of jet penetration in water were proposed. The theoretical model 1 was established considering the impact of the shock wave, combined with the shock equation Rankine–Hugoniot and the virtual origin calculation method. The theoretical model 2 was obtained by fitting theoretical analysis and numerical simulation results. The effectiveness and universality of the two theoretical models were compared through the numerical simulation results. Both the models can reflect the relationship between the penetration velocity and the penetration distance in water well, and both the deviation and stability of theoretical model 1 are better than 2, the lower penetration velocity, and the larger deviation of the theoretical model 2. Therefore, the theoretical model 1 can reflect the properties of jet penetration in water effectively, and provide the reference of model simulation and theoretical research.

scholarly journals A relação entre ciência e tecnologia a partir de três modelos teóricos distintos

DoisPontos ◽  
2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Gilmar Evandro Szczepanik
Keyword(s):  
Theoretical Model ◽  
Science And Technology ◽  
Theoretical Models ◽  
The Third

resumo: Este artigo tem por objetivo explorar as possíveis relações estabelecidas entre ciência e a tecnologia a partir de três modelos teóricos distintos. O primeiro modelo teórico é chamado de hierárquico e pressupõe uma relação de subordinação entre ciência e a tecnologia. O segundo modelo é denominado de não hierárquico e sustenta que ciência e a tecnologia se encontram fundidas de tal modo que não faz mais sentido tentar entendê-las separadamente. Por fim, o terceiro modelo teórico designado de emancipatório explora alguns elementos que permitem compreender a ciência e a tecnologia ainda como atividades distintas, embora possam trabalhar conjuntamente algumas vezes.Abstract:  This paper aims to  understand the possible  relations between science and technology from three different theoretical models. The first theoretical model is called hierarchical and implies a subordinate relationship between science and technology. The second model  is  called non-hierarchical  and argues  that  science  and technology are fused so that it makes more sense to try to understand them separately. Finally, the third theoretical model is called emancipatory  and explores some elements that allow us to understand science and technology as separate activities, although they may sometimes work together. 

scholarly journals Change in the Complexity of the Studied Concepts and Theoretical Models with the Age of the Student

2021 ◽  
pp. 132-136
Author(s):  
Robert V. Maier
Keyword(s):  
Theoretical Model ◽  
Theoretical Models ◽  
Dependency Graphs

The problem of the dependence of the didactic complexity of the studied concepts and theoretical models on the age of the student (schoolchild, student) is analysed. The complexity of a concept (term) can be characterized by the number of words from a fifth-grader’s thesaurus needed to explain its meaning. To find the complexity of a theoretical model of an object (for example, an atom), it is necessary to sum up the complexities of all the words that make up the description of the model and take into account the indicator of the variety of terms. Dependency graphs were built: 1) the complexity of the most difficult terms for understanding from the year of study; 2) the complexity of various theoretical models of the atom from the year of study at school and university. In both cases, the resulting curves are ascending, like a parabola, corresponding to an increase in complexity by almost a hundred times.

scholarly journals The Structural Model of Indicators of Educational Leadership for Primary School Principals

2021 ◽  
Author(s):  
Phalad Tipsrirach ◽  
Witoon Thacha ◽  
Prayuth Chusorn
Keyword(s):  
Theoretical Model ◽  
Educational Leadership ◽  
Primary School ◽  
Empirical Data ◽  
Goodness Of Fit ◽  
Structural Model ◽  
School Principals ◽  
Factor Loading ◽  
Primary School Principals ◽  
Fit Index

This research aimed at creating a structural model of the indicators of Educational Leadership for Primary School Principals in Thailand, which is considered to be a theoretical model that has been used to test for coherence with the empirical data collected from a sample group of 580 participants, who were selected from 30,719 Primary School Principals from across the country. To create this theoretical structural model, a study of the suitability of the indicators was carried out so that it could be further used in the selection within the model, as well as in the model’s coherence test with the empirical data and in the investigation of the factor loading. The results of the research were as follows: Firstly, all indicators, which had been applied in the research were selected and were then placed into the theoretical structural model because the average and distribution coefficient values were as set in the criteria. Secondly, the theoretical model is coherent with the empirical data as the values of relative Chi-square, Root Mean Square Error of Approximation, Goodness-of-Fit Index, Adjusted Goodness-of-Fit Index, Comparative Fit Index, and Normed Fit Index were as set in the criteria. Finally, the factor loadings of the key elements, sub-elements, and the indicators were as set in the criteria. This showed that the theoretical model from this research can be beneficial for the research population with construct validity.

scholarly journals The Effects of Knowledge, Training, and Competency on the Performance: A Case of Local Public Agricultural Mentors

2021 ◽  
Vol 3 (1) ◽  
pp. 144-158
Author(s):  
Erni Saptiowati S.
Keyword(s):  
Regression Analysis ◽  
Descriptive Analysis ◽  
Likert Scale ◽  
Survey Method ◽  
Validity And Reliability ◽  
Research Results ◽  
Positive Effects ◽  
Analysis Methods ◽  
Saturated Sample ◽  
Analyze Data

This research aimed to analyze the effects of knowledge, training, and competency on the performance, which local public agricultural mentors/officers in the Yapen Islands Regency are the unit analysis. Of 100 respondents were used as the saturated sample in this research. The research applied a survey method and used a five-point Likert scale as the instrument and the statistics program SPSS to analyze data. The analysis methods included descriptive analysis, validity and reliability tests, classical assumption test, and regression analysis. The research results show that the variables knowledge, training, and competency had significant positive effects on local public agricultural mentors' performance at the Yapen Islands Regency.

scholarly journals Sensitivity and specificity of the Akena Visual Depression Inventory (AViDI-18) in Kampala (Uganda) and Cape Town (South Africa)

2018 ◽  
Vol 212 (5) ◽  
pp. 301-307 ◽  
Author(s):  
Dickens Akena ◽  
John Joska ◽  
Dan J. Stein
Keyword(s):  
South Africa ◽  
Area Under The Curve ◽  
Cape Town ◽  
Signs And Symptoms ◽  
Factor Loading ◽  
Diagnostic Interview ◽  
Validity And Reliability ◽  
Neuropsychiatric Inventory ◽  
Low Literacy ◽  
Structured Diagnostic Interview

BackgroundVisual scales may be particularly useful in screening for depression in patients with low literacy. However, few have been validated and none are in common use.AimModification and validation of a visual scale to screen for depression in low literacy settings.MethodWe assessed the validity, reliability and factor loading of a 28-item visual depression inventory using pictorial items depicting depression signs and symptoms. We validated a revised scale comprised of 18 items known as the Akena Visual Depression Inventory (AViDI-18) against a structured diagnostic interview (Mini-International Neuropsychiatric Inventory) in 343 patients in Kampala (Uganda) and Cape Town (South Africa).ResultsThe 18 pictorial items had acceptable validity and reliability. The area under the curve (AUC) score of the AViDI-18 was 0.9. AUC scores were not significantly associated with sociodemographic variables.ConclusionThe AViDI-18 is a valid screen for depression in patients with low literacy.Declaration of interestNone.

A qualitative phenomenological exploration of social mood and investors’ risk tolerance in an emerging economy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Humaira Asad ◽  
Iqra Toqeer ◽  
Khalid Mahmood
Keyword(s):  
Theoretical Model ◽  
Thematic Analysis ◽  
Financial Literacy ◽  
Financial Risk ◽  
Theoretical Perspective ◽  
Emerging Economy ◽  
Risk Tolerance ◽  
Validity And Reliability ◽  
Content Type ◽  
Depth Analysis

Purpose The authors design a theoretical perspective that explores how different phases of social mood influence financial risk tolerance (FRT) among investors. Risk is involved in almost all financial decision-making. For a better understanding of risk tolerance behavior, the role played by social mood cannot be ignored. This study aims to explore the linkage between social mood and FRT of investors in Pakistan. Design/methodology/approach Using qualitative phenomenology as the guiding framework, 22 interviews were conducted to have a deeper understanding of the lived experiences of investors with at least 10 years of investment experience. Thematic analysis was done to analyze data. Audio-recording, bracketing, triangulation and member checking were done to ensure validity and reliability. Findings A theoretical model is developed using the six themes identified through thematic analysis. This model presents an in-depth analysis of the determinants of social mood, its multiple phases and its impact on risk tolerance behavior. Findings reveal that the level of financial literacy, experience and purpose of investment moderate the effect of social mood on FRT. Practical implications Investors can manage risk and increase their profits by controlling the effects of social mood. They can benefit from the market situation by taking more risk when the market is extremely low. The advisors can frame their advice in the light of the model. Originality/value According to the authors’ knowledge, this is the first study that explores investors’ risk tolerance in response to variations in social mood in the context of an emerging economy. The paper has contributed conceptually and methodologically. It uses phenomenology as the method and develops a theoretical model that describes how different types of investors adjust their risk tolerance in response to changes in their social mood.

scholarly journals Transparency and Replication in Cross-national Survey Research: Identification of Problems and Possible Solutions

2019 ◽  
pp. 004912411988245
Author(s):  
Elena Damian ◽  
Bart Meuleman ◽  
Wim van Oorschot
Keyword(s):  
Social Sciences ◽  
Theoretical Model ◽  
Survey Research ◽  
National Survey ◽  
Great Majority ◽  
Sufficient Information ◽  
Validity And Reliability ◽  
Research Transparency ◽  
National Studies ◽  
Cross National

In this article, we examine whether cross-national studies disclose enough information for independent researchers to evaluate the validity and reliability of the findings (evaluation transparency) or to perform a direct replication (replicability transparency). The first contribution is theoretical. We develop a heuristic theoretical model including the actors, factors, and processes that influence the transparency of cross-national studies and provide an overview of the measures currently taken to improve research transparency. The second contribution is empirical, in which we analyze the level of transparency in published cross-national studies. Specifically, using a random sample of 305 comparative studies published in one of 29 peer-reviewed social sciences journals (from 1986 to 2016), we show that, even though all the articles include some methodological information, the great majority lack sufficient information for evaluation and replication. Lastly, we develop and propose a set of transparency guidelines tailored for reporting cross-national survey research.

Retrieval of Bio-Geophysical Parameters from Remotely Sensing Data by Using Bayesian Methodology

2007 ◽  
pp. 222-252
Author(s):  
C. Notarnicola
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Theoretical Models ◽  
Data Sets ◽  
Model Errors ◽  
Sources Of Information ◽  
Remotely Sensed Data ◽  
Bayesian Methodology ◽  
Information Models ◽  
Bayesian Methodologies

This chapter introduces the use of Bayesian methodology for inversion purposes: the extraction of bio-geophysical parameters from remotely sensed data. Multisources information, such as different polarizations, frequencies, and sensors are fundamental to the development of operationally useful inversion systems. In this context, Bayesian methodologies offer a convenient tool of combining two or more disparate sources of information, models, and data. The chapter describes the development of a general model starting from a theoretical model, including the sensor noise and the model errors, by using a Bayesian approach. Furthermore, the developed procedure is applied to some experimental data sets. The author hopes that considering theoretical models and experimental data in many different configurations can give an idea of the versatility and robustness of the Bayesian framework.

scholarly journals Psychometric Properties of the Moore Index of Nutrition Self-Care in Arabic: A Study among Saudi Adolescents at King Saud University, Riyadh, Saudi Arabia

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Adel Bashatah ◽  
Khalid A. Alahmary
Keyword(s):  
Saudi Arabia ◽  
Self Care ◽  
Principal Component ◽  
Factor Loading ◽  
Arabic Language ◽  
Validity And Reliability ◽  
Cronbach’S Alpha ◽  
King Saud University ◽  
Adolescent Students ◽  
Cronbach's Alpha

Background and Objective. The Moore Index of Nutrition Self-Care (MIN-SC) questionnaire has been used widely in both English and Spanish languages. The purpose of this study is to convert MIN-SC into the Arabic language and to test the translated tool for validity and reliability among adolescents in Saudi Arabia. Method. The psychometric characteristics of MIN-SC were assessed using college freshman students at King Saud University in Riyadh, Saudi Arabia. The validity and reliability were examined using Cronbach’s alpha coefficient. The construct validity was examined through principal component analysis. Results. The MIN-SC instrument was shown to be internally consistent with reliable scoring (Cronbach’s alpha = 0.910). Exploratory factor analysis resulted in 42 items loading on three main components: estimative, production, and transitional, with a factor loading of eigenvalues >2. The final model explained 38% of the variance. Conclusion. The Arabic version of MIN-SC was shown to be a valid and reliable tool for assessing attitude toward nutrition among adolescent students.

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