scholarly journals Parametric and Statistical Study of the Wing Geometry of 75 Species of Odonata

2020 ◽  
Vol 10 (15) ◽  
pp. 5389 ◽  
Author(s):  
Nasim Chitsaz ◽  
Romeo Marian ◽  
Amirmasoud Chitsaz ◽  
Javaan S. Chahl
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Statistical Study ◽  
Structural Characteristics ◽  
Wing Shape ◽  
Geometrical Parameters ◽  
Flight Performance ◽  
Wing Geometry ◽  
Superficial Similarity ◽  
Independent Parameters

The flight performance and maneuverability of Odonata depends on wing shape and aero-structural characteristics, including airfoil shape, wingspan, and chord. Despite the superficial similarity between Odonata planforms, the frequency with which they are portrayed artistically, and the research interest in their aerodynamics, those features that are stable and those that are labile between species have not been identified. Studies have been done on 2D aerodynamics over corrugated wings; however, there is limited comparative quantified data on the planforms of Odonata wings. This study was undertaken to explore the scale relationships between the geometrical parameters of photogrammetrically reconstructed wings of 75 Odonata species, 66 from Epiprocta, and 9 from Zygoptera. The wing semi-spans captured in the database range from 24 to 85 mm. By carrying out an extensive statistical analysis of data, we show that the geometrical parameters for the suborder Epiprocta (dragonflies) can be classified into scale-dependent and independent parameters using regression analysis. A number of close correlations were found between the wingspan and the size of other structures. We found that amongst the variables considered, the largest independent variations against the forewing span were found in the chord of the hindwing, and that hindwing properties were not reliably predicted by the Odonata family. We suggest that this indicates continuous evolutionary pressure on this structure.

The Effects of Exercise Commitment Facilitated by Service Quality of Smartphone Exercise Applications on Continued Exercise Intention

2019 ◽  
Vol 118 (1) ◽  
pp. 14-19
Author(s):  
Boo-Gil Seok ◽  
Hyun-Suk Park
Keyword(s):  
College Students ◽  
Factor Analysis ◽  
Regression Analysis ◽  
Statistical Analysis ◽  
Correlation Analysis ◽  
Service Quality ◽  
Frequency Analysis ◽  
Primary Data ◽  
Exercise Intention

Background/Objectives: The purpose of this study is to examine the effects of exercise commitment facilitated by service quality of smartphone exercise Apps on continued exercise intention and provide primary data for developing and/or improving smartphone exercise Apps. Methods/Statistical analysis: A questionnaire survey was conducted amongst college students who have experiences in using exercise App(s) and regularly exercise. The questionnaire is composed of four parts asking about service quality, exercise commitment, continued exercise intention, which were measured with a 5-point Likert Scale, and demographics. Frequency analysis, factor analysis, correlation analysis, and regression analysis were carried out to analyze the obtained data with PASW 18.0.

scholarly journals Optimum Wing Shape of Highly Flexible Morphing Aircraft for Improved Flight Performance

2016 ◽  
Vol 53 (5) ◽  
pp. 1305-1316 ◽  
Author(s):  
Weihua Su ◽  
Sean Shan-Min Swei ◽  
Guoming G. Zhu
Keyword(s):  
Wing Shape ◽  
Flight Performance ◽  
Morphing Aircraft

Statistical analysis of structural characteristics of protein Ca2+-binding sites

2008 ◽  
Vol 13 (7) ◽  
pp. 1169-1181 ◽  
Author(s):  
Michael Kirberger ◽  
Xue Wang ◽  
Hai Deng ◽  
Wei Yang ◽  
Guantao Chen ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Binding Sites ◽  
Structural Characteristics

Cultural Variability in the Educational and Learning Capitals of Australian Families and Its Relationship With Children’s Numeracy Outcomes

2018 ◽  
Vol 41 (4) ◽  
pp. 348-368 ◽  
Author(s):  
Sivanes Phillipson ◽  
Shane N. Phillipson ◽  
Sarika Kewalramani
Keyword(s):  
Regression Analysis ◽  
Ethnic Identity ◽  
Statistical Analysis ◽  
Ethnic Groups ◽  
Stepwise Regression ◽  
Standardized Test ◽  
Educational Achievement ◽  
Multiple Comparison ◽  
Comparison Analysis ◽  
The Family

This article explored the variability of parental educational mind-sets among Australian parents toward the accessible educational and learning capitals that may affect their children’s educational achievement. The participants ( N = 1,917) responded to the Family Educational and Learning Capitals Questionnaire as well as their ethnic identity. Parents also reported their children’s numeracy scores in a standardized test of achievement. Six major groups were adequate for statistical analysis, including Australians, British, Chinese, Indian, Other Asian, and Other European. A multiple comparison analysis was performed on the responses by parents from the six ethnic groups to examine the differences in parent responses to access to capitals. Controlled for ethnic groups, stepwise regression analysis showed which capitals predicted numeracy achievement of their children. The results indicated that within this sample of Australian parents, there is variability across different ethnic groups in what is considered important in their children’s educational achievement and this variability is associated with differences in numeracy outcomes.

Regression Analysis on Influences of Hem Parameters on Flare Sagging of Semi-Circular Skirt

2011 ◽  
Vol 331 ◽  
pp. 594-598
Author(s):  
Hong Ni
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Measured Data ◽  
Silk Fabric ◽  
Linear Regression Equation ◽  
Analysis Software ◽  
Wool Fabrics ◽  
Object Of Study ◽  
The Relationship ◽  
Statistical Analysis Software

Select 45 pieces of silk, cotton and wool fabrics in total, with semi-circular skirt modeling as object of study, investigate the relationship between flare sagging in straight & inclined grains of skirt pieces and fabric types, analyze the influence of hem parameters on flare sagging of semi-circular skirt and obtain multiple linear regression equation by disposing the measured data with SPSS statistical analysis software. The study result shows that the skirt hem of silk fabric is sagging more significantly than that of cotton and wool fabrics and there is a multi-linear relationship between semi-circular flare sagging and parameters.The research of this subject has both theoretical value and practical value.

Evaluating Equity in the Marital Relationship: An Alternative Approach

1982 ◽  
Vol 51 (3) ◽  
pp. 759-762 ◽  
Author(s):  
Walter R. Schumm ◽  
Julia E. Kirn
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Careful Attention ◽  
Social Scientists ◽  
Difference Scores ◽  
Interaction Terms ◽  
Integrate Theory ◽  
Alternative Approach

Theory concerning the differing perceptions of marital partners often seems to invite the use of difference scores for measuring concepts such as equity, homogamy, inconsistency in social status, consensus regarding various attitudes, and similarity of personality traits. However, as illustrated with an example from equity theory, difference scores should be replaced by interaction terms in multiple regression analysis to evaluate such theory adequately. More careful attention needs to be paid to how family social scientists integrate theory, measurement, and statistical analysis in research.

scholarly journals PENERAPAN METODE BOOTSTRAP RESIDUAL DALAM MENGATASI BIAS PADA PENDUGA PARAMETER ANALISIS REGRESI

2014 ◽  
Vol 3 (4) ◽  
pp. 130
Author(s):  
NI MADE METTA ASTARI ◽  
NI LUH PUTU SUCIPTAWATI ◽  
I KOMANG GDE SUKARSA
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Confidence Intervals ◽  
Bootstrap Method ◽  
Least Square ◽  
Prediction Tool ◽  
Analysis Method ◽  
Ordinary Least Square ◽  
Independent Variable ◽  
Parameter Estimators

Statistical analysis which aims to analyze a linear relationship between the independent variable and the dependent variable is known as regression analysis. To estimate parameters in a regression analysis method commonly used is the Ordinary Least Square (OLS). But the assumption is often violated in the OLS, the assumption of normality due to one outlier. As a result of the presence of outliers is parameter estimators produced by the OLS will be biased. Bootstrap Residual is a bootstrap method that is applied to the residual resampling process. The results showed that the residual bootstrap method is only able to overcome the bias on the number of outliers 5% with 99% confidence intervals. The resulting parameters estimators approach the residual bootstrap values ??OLS initial allegations were also able to show that the bootstrap is an accurate prediction tool.

scholarly journals The Dynamics in the Structure of Sugarcane Job Market

2015 ◽  
Vol 9 (2) ◽  
pp. 21
Author(s):  
Roselis Natalina Mazzuchetti ◽  
Rosangela Maria Pontili ◽  
Katia Fabiane Rodrigues
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
The State ◽  
Job Market ◽  
Production Chain ◽  
Sugarcane Production

Esta pesquisa teve como propósito averiguar a estrutura do mercado de trabalho na atividade de cultivo de cana-de-açúcar, à luz das mudanças recentes ocorridas no setor sucroalcooleiro, levando-se em conta os principais estados produtores de cana. Para tanto, realizou-se uma análise estatística descritiva e uma análise de regressão linear simples, com base nos dados da PNAD, de 1997 a 2009. Como corolário, constatou-se que houve uma redução da informalidade no mercado de trabalho em questão, sendo que esta redução foi mais expressiva em Alagoas. Confirmou-se, também, mudanças recentes nas ocupações do setor, com acréscimos nas atividades técnicas, representadas por tratoristas e operadores de máquinas. Evidenciou-se que o mercado de trabalho do setor em questão tem sua dinâmica diretamente ligada aos fatores que ocorrem na cadeia produtiva do setor sucroalcooleiro como um todo.Palavras-Chave: Mercado de Trabalho, Tecnologia, Agronegócios e Produção de cana-de-açúcar.***Abstract:This research aims to verify the structure of sugarcane cultivation’s job market, considering the recent changes in this sector and the states with the major production. For that, descriptive and statistical analysis were made, as well as a simplified line regression analysis, based on the Pesquisa Nacional por Amostra de Domicílios - PNAD data, for the 1997-2009 period. As corollary, it was stated that there was a reduction in the informal jobs in the sugarcane production market, showing more expressivity in the state of Alagoas. Recent changes in the sector occupation were confirmed, as an increase in technical activities, represented by tractors and machinery operators. It was evidenced that this sector’s job market has its dynamics closely linked to the sugarcane production chain as a whole.Keywords: Job Market, Agribusiness, Technology, Sugarcane production.***Sumario:Esta investigación tuvo como objetivo investigar la estructura del mercado de trabajo en la actividad del cultivo de la caña de azúcar a la luz de los cambios recientes en el sector del azúcar y el alcohol, teniendo en cuenta los principales estados productores de caña de azúcar. Para ello, se realizó un análisis estadístico descriptivo y un análisis de regresión lineal simple basado en datos de la Encuesta Nacional de Hogares de 1997 a 2009. Como corolario, se encontró que hubo una reducción de la informalidad en el mercado laboral de que se trate, y esta reducción fue más significativa en Alagoas. Se confirmó, también, los cambios recientes en las ocupaciones de la industria, con actividades técnicas superiores, representados por los conductores de tractores y operadores de máquinas. Era evidente que el sector del mercado de trabajo en cuestión ha su dinámica directamente relacionada con factores que se producen en la cadena de producción de este sector en su conjunto.Palabras clave: mercado de trabajo, tecnología, los Negocios Agrícolas y la caña de azúcar de producción

scholarly journals Sabermetría y nuevas tendencias en el análisis estadístico del juego de béisbol (Sabermetrics and new trends in statistical analysis of baseball)

Retos ◽  
2015 ◽  
pp. 122-127
Author(s):  
César Soto Valero ◽  
Mabel González Castellanos
Keyword(s):  
Statistical Analysis ◽  
Empirical Analysis ◽  
Statistical Study ◽  
Team Sports ◽  
Baseball Game ◽  
Objective Evidence ◽  
Individual Value

La sabermetría es reconocida actualmente como una tendencia novedosa en el estudio del juego de béisbol. Con mucho auge y utilización en el análisis empírico, esta se basa en el estudio estadístico riguroso de la evidencia objetiva obtenida durante el juego. Teniendo en cuenta tanto sus aportes teóricos como prácticos, la sabermetría se fundamenta en una constante búsqueda por comprender cómo jugar mejor y más eficientemente al béisbol, lo cual se expresa y soporta mediante un tipo de análisis de actuación único entre todos los deportes colectivos. El presente trabajo aborda los aspectos esenciales de la sabermetría, fundamentando la necesidad de su surgimiento y utilización, como una forma de perfeccionar la manera en que tradicionalmente se ha llevado a cabo el análisis estadístico en el béisbol. Además, se brinda un resumen de los estadísticos sabermétricos más utilizados, tanto de bateo y picheo como otros de valor individual para el equipo, con el propósito de hacer más clara su comprensión, estudio y posterior utilización entre los seguidores de este deporte.Abstract. Sabermetrics is recognized as a new trend in the study of baseball game. This is based on the rigorous statistical study of the objective evidence obtained and has been used extensively in its empirical analysis. Considering both theoretical and practical contributions, sabermetrics involves the constant quest of understanding how to play baseball better and more efficiently, which is expressed and supported by an exceptional type of analysis performance unique among all team sports. This paper describes the essential aspects of sabermetrics, pointing in the necessity of its emergence and use, as a way to improve the traditional statistical analysis of baseball. Moreover, a summary of the sabermetrics statistics most widely used is given. Both batting and pitching, as well as others of individual value for the team are stated throughout this work in order to make sabermetrics understanding, study and further use clearer among followers of this sport.

scholarly journals Verification of normal distribution of welding distortions

2019 ◽  
Vol 91 (3) ◽  
Author(s):  
Damian Grzesiak ◽  
Jarosław Plichta
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Normal Distribution ◽  
Sheet Metal ◽  
Welding Process ◽  
Experiment Planning ◽  
Geometrical Parameters ◽  
Butt Welds ◽  
Planning Methods ◽  
Smirnov Test

The aim of this paper is to answer the question of the distribution of welding distortions. The MIG method was used to make 31 butt welds of 0H18N9 sheet metal, of 6 mm thickness and dimensions 150x350 mm. All joints are made with constant parameters of the welding process. Statistical analysis of the distribution and Kolomogorov-Smirnov test were used in this paper. On the grounds of the analysis it was proved that the distribution of welding deformations is a normal distribution. This justifies the use of experiment planning methods and the use of average values. The relatively high value of the standard deviation makes it necessary to take into account the geometrical parameters of the joint.

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