scholarly journals Body volume modeling by linear features of the Irmen type cattle

2020 ◽  
Vol 50 (6) ◽  
pp. 106-114
Author(s):  
A. F. Petrov ◽  
E. V. Kamaldinov ◽  
O. D. Panferova ◽  
O. V. Efremova ◽  
V. A. Rogozin
Keyword(s):  
Regression Models ◽  
Complex Trait ◽  
The Body ◽  
Body Volume ◽  
Linear Regression Models ◽  
Linear Features ◽  
Volume Response ◽  
Volume Modeling ◽  
High Level

The results of modeling the variability of the complex trait "body volume" by linear traits measured on a 10-point scale in accordance with the current instructions for cattle grading of dairy and dairy-beef breeds are presented. The object of research is the complex indicator "body volume" of Irmen type cattle. The exterior of the livestock was evaluated by experts on a collegial basis. The models obtained made it possible to identify a group of exterior features associated with the variability of the studied trait and to identify errors in the work of the evaluators. The tasks were solved using multiple linear, polynomial, power and logarithmic regression models. It was found that multiple linear regression models accurately describe the norm reaction of the body volume response. Residue distribution diagrams made it possible to control the quality of appraisers' assessment and adjust their further work. The logarithmic model was marked as closest to linear. The residues in most cases turned out to be close to zero, which was explained by the low level of variability of the traits used. It was revealed that the use of different levels of power orders in modeling the variability of the body volume in points can lead to the emergence of biologically inexplicable relationships with such linear features as the location of the front teats, the location of the rear teats, attachment of the anterior lobes and the position of the bottom of the udder. The construction of the scatter diagram revealed a high level of variation in the residues and led to the conclusion that it was inexpedient to introduce power series models into the practical work of livestock breeders. The insignificant contribution of the studied linear features to the variation of the complex feature under study is shown. High intra-group variance in the construction of second- and fourth-order polynomial models was reflected in the lowest values of the Fisher criterion.

scholarly journals Association between Anxiety, Quality of Life and Academic Performance of the Final-Year-Students in Latvia

2021 ◽  
Vol 18 (11) ◽  
pp. 5784
Author(s):  
Inta Zile ◽  
Ieva Bite ◽  
Indra Krumina ◽  
Valdis Folkmanis ◽  
Lilian Tzivian
Keyword(s):  
Quality Of Life ◽  
Longitudinal Study ◽  
Regression Models ◽  
Linear Regression Models ◽  
Academic Achievements ◽  
School Year ◽  
And Gender ◽  
Type Of School ◽  
Multiple Linear Regression Models

The main objective of this study was to investigate the association between final-year students’ anxiety level and quality of life (QOL) with their academic achievements. A longitudinal study was performed in regular schools and in high-rated gymnasiums at the beginning and at the end of the school year. Multiple linear regression models were built for the association between level of anxiety/QOL with academic achievements. Type of school and gender—but not the level of anxiety—were the main predictors of academic achievements of 287 adolescents (e.g., for mathematics, the effect estimates were: β = −1.71 [95% confidence interval −2.21; −1.21]; β = −0.50 [−0.95; −0.06], β = 0.09 [−0.02; 0.20] for the type of school, gender, and changes in level of anxiety, respectively). To conclude, particular efforts should be made to reduce the level of anxiety in girls, especially those that study in high-rated schools.

scholarly journals Pengaruh Kompetensi dan Kegiatan Komite Audit terhadap Kualitas Audit

2019 ◽  
Vol 14 (1) ◽  
pp. 25-36
Author(s):  
Dayu Swispa Pamantau
Keyword(s):  
Regression Models ◽  
Audit Committee ◽  
Audit Quality ◽  
Analysis Method ◽  
Linear Regression Models ◽  
High Competence ◽  
The City ◽  
A Company

The accuracy of the determination of policies within a company is determined by the quality of the resulting audit by the auditor. Audit quality will be higher when the auditor assigned to have high competence in the field of audit, in addition to the quality of the audit will be better if the activities of the audit committee to provide oversight of internal party activities. Therefore, this study purpose to determine the effect of the competence and activities of the audit committee on audit quality. The study was conducted at the KAP region of the city of Padang and Pekanbaru. The sample used was 43 respondents. The analysis method used is to use multiple linear regression models. Based on the results of hypothesis testing results found that the competence and activities of the audit committee have a significant effect on audit quality auditors working in KAP of Padang and Pekanbaru city.

scholarly journals Factors associated with parasite dominance in fishes from Brazil

2016 ◽  
Vol 25 (2) ◽  
pp. 225-230
Author(s):  
Cristina Fernandes do Amarante ◽  
Wagner de Souza Tassinari ◽  
Jose Luis Luque ◽  
Maria Julia Salim Pereira
Keyword(s):  
Linear Regression ◽  
Body Length ◽  
Regression Models ◽  
Mixed Model ◽  
Multiple Linear Regression Model ◽  
Mixed Effects ◽  
The Body ◽  
Linear Regression Models ◽  
Biological Aspects ◽  
The Relationship

Abstract The present study used regression models to evaluate the existence of factors that may influence the numerical parasite dominance with an epidemiological approximation. A database including 3,746 fish specimens and their respective parasites were used to evaluate the relationship between parasite dominance and biotic characteristics inherent to the studied hosts and the parasite taxa. Multivariate, classical, and mixed effects linear regression models were fitted. The calculations were performed using R software (95% CI). In the fitting of the classical multiple linear regression model, freshwater and planktivorous fish species and body length, as well as the species of the taxa Trematoda, Monogenea, and Hirudinea, were associated with parasite dominance. However, the fitting of the mixed effects model showed that the body length of the host and the species of the taxa Nematoda, Trematoda, Monogenea, Hirudinea, and Crustacea were significantly associated with parasite dominance. Studies that consider specific biological aspects of the hosts and parasites should expand the knowledge regarding factors that influence the numerical dominance of fish in Brazil. The use of a mixed model shows, once again, the importance of the appropriate use of a model correlated with the characteristics of the data to obtain consistent results.

scholarly journals Quality of services: an application with customer complaint data from a telecommunication company

2021 ◽  
Vol 12 (4) ◽  
pp. 928-944
Author(s):  
Jorge alberto Achcar ◽  
Daniel Marcos Godoy
Keyword(s):  
Count Data ◽  
Regression Models ◽  
Quality Standard ◽  
Logarithmic Scale ◽  
Linear Regression Models ◽  
Statistical Process ◽  
Factors Affecting ◽  
Customer Complaint ◽  
Telecommunication Company

The evaluation of the service quality standard of a telecommunication company using statistical process control (SPC) methods is the main goal of this paper. The study used a dataset collected from January 2018 to November 2019 associated with monthly and weekly customer complaint counts due to the technical services provided by the company. Multiple linear regression models with the count data transformed to a logarithmic scale and Poisson regression models with the original count data detected some significant factors affecting the weekly/monthly complaint counts. In addition, forecasts of future complaint counts based on the statistical models could be of interest for the company to plan the number of technicians in different sectors at different times of the year leading to improvements in the service provided by the telephone company.

scholarly journals Analysis of injected cement volume and clinical outcomes following kyphoplasty for vertebral compression fractures

2020 ◽  
Vol 11 ◽  
pp. 56
Author(s):  
Mitchell Self ◽  
James Mooney ◽  
John Amburgy ◽  
Bonita Agee ◽  
Leah Schoel ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Linear Regression ◽  
Regression Models ◽  
Body Height ◽  
Postoperative Outcome ◽  
Vertebral Compression Fractures ◽  
Linear Regression Models ◽  
Pain Disability ◽  
Patient Outcome Measures

Background: It has been suggested that greater volumes of cement injected during kyphoplasty correlate with improved vertebral body height restoration and kyphotic angulation correction. However, there is little evidence tying cement volume to patient outcomes. Here, we analyzed the association between cement volume and outcome utilizing indices of pain, disability, and quality of life. Methods: One hundred and thirty-six patients undergoing kyphoplasty were analyzed retrospectively. The total volume of bone cement injected was recorded intraoperatively for each patient; the average total cement volume was 5.44 cc. Pre- and postoperative outcome indices were documented, using the visual analog scale (VAS), Roland-Morris disability index (RMDI), and the EuroQol 5 Dimension instrument (EQ5D). Pearson’s correlations and linear regression models were derived for the association of total cement volume with each of the patient outcome measures. This was a retrospective cohort study. Results: The average change in VAS, RMDI, and EQ5D scores for all patients was −6.8, +8.3, and +0.41, respectively. For VAS, RMDI, and EQ5D improvements, neither Pearson’s correlations nor multiple linear regression models revealed a correlation or an association with total cement volume. Conclusion: For patients undergoing kyphoplasty, outcomes were not associated with the total injected cement volume; all had a significant reduction in pain and most exhibited decreased disability with improved quality of life.

scholarly journals Inflammatory Markers Are Positively Associated with Serumtrans-Fatty Acids in an Adult American Population

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Mohsen Mazidi ◽  
Hong-kai Gao ◽  
Andre Pascal Kengne
Keyword(s):  
Fatty Acids ◽  
Linear Regression ◽  
Regression Models ◽  
Survey Design ◽  
High Sensitivity ◽  
Analysis Of Covariance ◽  
Linear Regression Models ◽  
Inflammatory Profile ◽  
Hs Crp ◽  
High Level

Background and Aim. The relationship between serumtrans-fatty acids (TFAs) and systemic inflammation markers is unclear. We investigated the association of serum TFAs with high sensitivity C-reactive protein (hs-CRP) and fibrinogen in adult Americans.Methods. The 1999 to 2000 National Health and Nutrition Examination Survey (NHANES) participants with measured data on hs-CRP and fibrinogen were included. TFAs were measured via capillary gas chromatography and mass spectrometry using negative chemical ionization. Analysis of covariance and multivariable-adjusted linear regression models were used to investigate the associations between these parameters, accounting for the survey design.Results. Of the 5446 eligible participants, 46.8% (n=2550) were men. The mean age was 47.1 years overall: 47.8 years in men and 46.5 years in women (p=0.085). After adjustment for age and sex, mean serum TFAs rose with the increasing quarters of hs-CRP and fibrinogen (bothp<0.001). In linear regression models adjusted for age, sex, race, education, marital status, body mass index, and smoking, serum TFAs were an independent predictor of plasma hs-CRP and fibrinogen levels.Conclusion. A high level of TFAs appears to be a contributor to an unfavourable inflammatory profile. Because serum TFAs concentrations are affected by dietary TFA intake, these data suggest a possible contribution of TFAs intake modulation in the prevention of inflammation-related chronic diseases.

scholarly journals Targets of Psychological Work for High Alexithymia People

2019 ◽  
Vol 16 (1) ◽  
pp. 55-70 ◽  
Author(s):  
Emma V Gaus ◽  
Evgeny A Pronenko ◽  
Olga S Vasilyeva
Keyword(s):  
Interpersonal Relations ◽  
Empirical Studies ◽  
The Body ◽  
Theoretical Understanding ◽  
The People ◽  
Psychological Assistance ◽  
The Moment ◽  
High Level ◽  
Psychosomatic Diseases

The article reviewed the modern empirical studies of alexithymia, summarized the theoretical understanding of the phenomenon of alexithymia, describes the difficulties faced by the people with a high level of alexithymia and suggested tips on psychological work with the alexithymic people. The novelty of this research consists in the formulation of the aspects of the practical work of a psychologist in order to increase the level of the adaptation of the alexithymics and improve the quality of their life. At the moment, this problem is covered in only a small amount of research. The main result of the article is the identification of the areas of psychological work with the alexithymics: (1) the improvement of the connection with the body; (2) the correction of personality problems; (3) the psychological assistance in the harmonization of the interpersonal relations. It has been shown that disrupted connection with the body is one of the most significant problems of the alexithymics and the factor which contributes to the development of psychosomatic diseases. For the improvement of the connection with the body the authors suggest such types of psychological work as the differentiation of physical feelings, a fuller understanding of the body map, the ability to control the condition of the body, the acceptance of the body and the increase in the satisfaction with it. The ways of working with the most significant personality problems of the alexithymics are singled out (correction of non-adaptive coping-strategies, low level of life satisfaction, rigidity, and instability of the emotional sphere). The areas of work on improving the relations of the alexithymics with the surrounding people are highlighted (gaining more knowledge about the emotional sphere, working with friends and relatives, teaching communication skills, taking into account the influence of alexithymia). Finally, the conclusion is made about the importance of the integrated psychological work with the people with a high level of alexithymia in order to develop the specific tools for comprehensive assistance to alexithymics.

scholarly journals Simplicity, Price, Quality of Service and Safety Towards The Decision to Purchase Products Through Shopee.id Application

2020 ◽  
Vol 5 (1) ◽  
pp. 71-82
Author(s):  
Nursiam Nursiam ◽  
Anastasia Auti Merry Yanissa ◽  
Kurnia Rina Ariani
Keyword(s):  
Quality Of Service ◽  
Regression Models ◽  
Sampling Method ◽  
Total Sample ◽  
Accounting Students ◽  
Linear Regression Models ◽  
Purchasing Decisions ◽  
Analysis Techniques ◽  
Multiple Linear Regression Models

This study aims to determine the effect of convenience, price, service quality and safety on product purchasing decisions through the shopee.id application. The method used in this study is a quantitative method. Respondents in this study were accounting students for the 2016 class of the Faculty of Economics and Business, University of Muhammadiyah Surakarta, where sampling used the incidental sampling method, with a total sample of 81 respondents. Data analysis techniques used multiple linear regression models. The results of this study indicate that ease, price, and quality of service affect the product purchase decision through the Shopee.id application with each sig value of 0,033; 0,000; and 0,000. Meanwhile, security has no effect on product purchasing decisions through the shopee.id application with a sig value of 0,087. Keywords : ease, price, quality of service, security, decision on purchasing product.

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