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Mulyaning A, Endang Cahya
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Interpretasi Validitas dan Reliabilitas Instrumen Kemampuan Berpikir Aljabar Nubatonis, Ofirenty Elyada; Jupri, Al; Mulyaning A, Endang Cahya
Jambura Journal of Mathematics Education Vol 5, No 1: Maret 2024
Publisher : Department of Mathematics, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jmathedu.v5i1.23435

Abstract

This research aims to interpret the validity and reliability of the items on the algebraic thinking ability instrument which are linked to content, context, question structure and students' cognitive level. The development of the algebraic thinking ability instrument was carried out in four stages by adapting the Plomp development model. The first stage (initial assessment), conducting a theoretical study of algebraic thinking abilities and curriculum analysis. The second stage (design), draft questions by paying attention to the relationship between indicators of algebraic thinking ability and learning objectives. Furthermore, this question design was validated by three experts in the field of mathematics education. The fourth stage (realization/construction) is testing the instrument which includes testing validity, reliability, distinguishability and level of difficulty. Apart from that, in the fourth stage the test results are also interpreted, evaluated and revised. The instrument was tested on 19 class VII students at one of the junior high schools in Bandung City. Interpretations of validity, reliability, distinguishability and level of difficulty are related to content, context, question structure and students' cognitive level. The results of the analysis at this stage are used as a reference for improving the instrument. The instrument produced in this research is a description question consisting of four items that are valid and reliable and can be used to measure algebraic thinking abilities, especially those related to generalization, transformation and metaglobal abilities.
Model Matematika Diabetes Melitus dengan Pengaruh Pola Hidup dan Perawatan Berdasarkan Faktor Risiko Biologis Abolla, Gloria Angelica; Yulianti, Kartika; Mulyaning A, Endang Cahya
Jurnal Riset Mahasiswa Matematika Vol 5, No 1 (2025): Jurnal Riset Mahasiswa Matematika
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/jrmm.v5i1.35807

Abstract

Diabetes melitus (DM) merupakan gangguan metabolisme yang ditandai dengan peningkatan kadar glukosa darah (hiperglikemia). Jumlah penderita DM terus meningkat secara global, dan Indonesia menempati peringkat keempat negara dengan jumlah kasus terbanyak di dunia. Penelitian ini membangun model matematika Susceptible--Exposed--Infected--Treated--Recovered (SEITR) untuk menggambarkan dinamika perkembangan jumlah penderita DM dengan melibatkan faktor risiko biologis seperti genetik dan non-genetik, serta pengaruh pola hidup dan perawatan. Hasil analisis menunjukkan bahwa terdapat dua titik ekuilibrium, yaitu ekuilibrium bebas penyakit dan endemik yang bersifat stabil jika transisi individu sehat menjadi pradiabetes akibat faktor genetik, non-genetik, pola hidup buruk, dan laju kelahiran tidak lebih besar dibanding gabungan laju kehilangan dari status karena kematian alami, perkembangan ke DM, atau pengendalian.  Solusi numerik bersesuaian dengan analisa kualitatif dan menggunakan metode Runge-Kutta Fehlberg. Hasil simulasi menunjukkan bahwa pengendalian perkembangan DM dapat dilakukan melalui dua hal, yaitu meningkatkan laju pola hidup sehat dan meningkatkan pencegahan sejak fase pradiabetes.
Co-Authors Abolla, Gloria Angelica Kartika Yulianti Nubatonis, Ofirenty Elyada