Penelitian ini bertujuan untuk mendeskripsikan minat siswa terhadap matematika dan hubungannya dengan metode pembelajaran dan efikasi diri. Populasi dari penelitian ini adalah seluruh siswa sekolah menengah pertama di Bandarlampung. Penelitian deskriptif kuantitatif ini mempelajari 691 siswa yang dipilih menggunakan teknik stratified random sampling. Data dalam penelitian ini berupa data minat siswa terhadap matematika (Y), data implementasi metode pembelajaran (X1), dan data efikasi diri siswa (X2) yang diperoleh menggunakan teknik non-tes berupa angket. Data dianalisis menggunakan analisis korelasi dan regresi linier berganda dengan . Hasil analisis data menunjukkan bahwa: (i) secara umum 22,58% siswa memiliki minat terhadap matematika dengan kategori tinggi, 76,56% dengan kategori sedang, dan 0,86% dalam kategori rendah; (ii) terdapat hubungan positif yang sangat kuat antara variabel implementasi metode pembelajaran dan efikasi diri secara bersama-sama terhadap variabel minat dengan nilai r = 0,844; (iii) terdapat hubungan positif yang cukup kuat antara implementasi metode pembelajaran dengan minat terhadap matematika bila peran efikasi diri tidak berubah (tetap) dengan r = 0,505; (iv) terdapat hubungan positif yang cukup kuat antara efikasi diri dengan minat terhadap matematika bila peran implementasi metode tidak berubah (tetap) dengan r = 0,585; dan (v) persamaan model regresi liniernya adalah Y = 22,788+0,972 X1+0,932 X2.
Mixed convection is the combination of a free convection caused by the buoyancy forces due to the different density and a forced convection due to external forces that increase the heat exchange rate. This means that, in free convection, the effect of external forces is significant besides buoyancy forces. In this study the fluid type with viscoelastic effect is non-Newtonian. The viscoelastic fluids that pass over a surface of a sphere form a thin layer, which due to their dominant viscosity is called by the border layer. The obtained limiting layer is analyzed with the thickness of the boundary layer- near the lower stagnating point, then obtained dimensional boundary layer equations, continuity, momentum, and energy equations. These dimensional boundary layer equations are then transformed into non-dimensional boundary layer equations by using non-dimensional variables. Further, the non-dimensional boundary layer equations are transformed into ordinary differential equations by using stream function, so that obtained the non-similar boundary layer equations. These non-similar boundary layer equations are solved numerically by using finite difference method of Keller-Box. The discretization results are non-linear and it should be linearized using newton linearization technique. The numerical solutions are analyzed the effect of Prandtl number, viscoelastic, mixed convection, and MHD parameters towards velocity profile, temperature profile, and wall temperature.
A mental model is an essential element that influences the quality of problem-solving. This study explores mental models, strategies, and schemes that are active in solving the maximum rectangular area problem. The approach used in this study is a descriptive qualitative approach. A total of four pre-service mathematics teachers as subjects were selected from 108 prospective subjects involved in the study. Data collection was carried out by providing task sheets for solving the most significant rectangular area problem and semi-structured interviews. Data reduction, data presentation, and conclusion are three stages in analyzing the research data. This study indicates three mental models for pre-service mathematics teachers in solving maximum rectangular area problems: initial, adaptive, and formal. Each has different strategies and schemes that are active while solving problems. The results of this study imply that mental models influence the quality of the problem solving process until results are obtained.
Yoga , in Hindu philosophy, focuses on meditation activities or tapa where ones focuses all thoughts to control the five senses and the body as a whole. The rapid progress of information and communication technology and the lack of Hindu Yoga learning media in digital form have encouraged the development of Hindu Yoga Learning Applications Android-based. This application is expected to be a practical and interesting learning media to be learnt, as well as a reference in learning the movements of Hatha Yoga and Surya Namaskara besides books. This study has succeeded in developing an Android Application of Hindu Yoga Learning consisting of 46 Yoga movements, among others, 12 (twelve) Surya Namaskara movements, 8 (eight) pranayama movements, 7 (seven) sitting position of asanas movements, 8 standing position of asanas movements and 11 (eleven) sleep position of asanas movements. This application runs on the Android operating system so that it can be accessed by everyone and at any time on a smartphone or tablet computer that supports the Android operating system. The conclusion of this study is that the Hindu Yoga Learning Applications Android-based has been successfully built and it has been tested to match with the expected result.
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