Fourier–Galerkin domain truncation method for Stokes’ first problem with Oldroyd four-constant liquid

AbstractUsing the Fourier–Galerkin method with domain truncation strategy, Stokes’ first problem for Oldroyd four-constant liquid on a semi-infinite interval is studied. It is shown that the Fourier–Galerkin approximations are convergent on the bounded interval. Moreover, an efficient and accurate algorithm based on the Fourier–Galerkin approximations is developed and implemented in solving the differential equations related to the present problem. Also, the effects of non-Newtonian parameters on the flow characteristics are obtained and analyzed. The method developed here is so general that it can be used to study the mathematical models that involve the flow of viscous fluids with shear rate-dependent properties: For example, models dealing with polymer processing, tribology & lubrication, and food processing

Nodule Detection in a Lung Region that's Segmented with Using Genetic Cellular Neural Networks and 3D Template Matching with Fuzzy Rule Based Thresholding

Objective: The purpose of this study was to develop a new method for automated lung nodule detection in serial section CT images with using the characteristics of the 3D appearance of the nodules that distinguish themselves from the vessels

Relationship between Basic Psychological Needs and Problematic Internet Use of Adolescents: The Mediating Role of Life Satisfaction

WOS:000611518000001This study aimed to examine the mediating role of life satisfaction in the relationship between basic psychological needs of adolescents and problematic internet use. The model established on this mediating role was tested using the self-determination theory. The sample of the study included 1318 adolescents, of whom 796 were female and 522 were male students. The age range of the individuals participating in the study varied between 14 and 17 years, and the average age was 15.38 (Standard Deviation= 4.77). The study obtained data through the Problematic Internet Use Scale-Adolescent Form, Psychological Needs Scale-High School Form, Life Satisfaction Scale, and Personal Information Form. The data were analyzed using conditional process analysis. The results revealed that basic psychological needs significantly negatively predicted problematic internet use (r(2)=0.15; p <= 0.01) and positively predicted life satisfaction (r(2)=0.28; p <= 0.01); whereas life satisfaction significantly negatively predicted problematic internet use (r(2)=0.08; p <= 0.01). Using the Self-determination Theory, the study determined that life satisfaction has a partial mediating role in the relationship between basic psychological needs and problematic internet use among high school students (c'=0.06; p <= 0.01). The study findings confirmed the established model. The obtained results are discussed and interpreted against relevant literature. Some suggestions have been offered to families, school counselors, and researchers