Hesti Widyawati
Universitas Negeri Surabaya

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

Integrated Non-Digital Media Innovation ‘Space Capsule’ to Train Spatial Visualization Skills in Solid Geometry for Students Hilma Alia; Lisnani Lisnani; Hesti Widyawati; Justin Walker; Riza Haikal Azhar
Mosharafa: Jurnal Pendidikan Matematika Vol. 15 No. 1 (2026): January
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/mosharafa.v15i1.3551

Abstract

Tujuan penelitian ini menghasilkan media pembelajaran non-digital terintegrasi bernama "Kapsul Ruang" untuk melatih kemampuan visualisasi spasial materi bangun ruang siswa SMP. Studi ini dirancang menggunakan pendekatan model 4D, yang mencakup fase Define, Design, Develop, dan Disseminate yang melibatkan validator ahli materi dan media, serta siswa SMP sebagai subjek uji coba melalui tahapan one-to-one, small group, dan field test. Informasi dikumpulkan serta dievaluasi berdasarkan standar validitas, kegunaan praktis, dan dampak efektif dari bahan ajar non-digital yang sedang dalam proses pembuatan. Media non digital terbukti memiliki tingkat kevalidan 85% dengan kategori sangat valid, kepraktisan tinggi dengan persentase 89,3%, dan efektif meningkatkan pemahaman konsep geometri tiga dimensi, terutama bagi sekolah dengan keterbatasan akses teknologi digital. Media non digital ini berimplikasi bagi pembelajaran matematika sebagai sepaket media pembelajaran dengan integrasi pendekatan visual, manipulatif, dan game-based learning sehingga yang memberikan alternatif solusi praktis yang responsif. The purpose of this study is to produce an integrated non-digital learning media called "Space Capsule" to train the spatial visualization ability of junior high school students' spatial geometry material. The study was crafted using the 4D development framework, which includes the stages of Define, Design, Develop, and Disseminate used by involving expert validators of material and media, as well as junior high school students as trial subjects through one-to-one, small group, and field test stages. Information was gathered and evaluated based on the standards of validity, practicality, and effectiveness for the non-digital media currently in development. Non-digital media is proven to have a validity level of 85% with a very valid category, high practicality with a percentage of 89.3%, and is effective in increasing the understanding of three-dimensional geometry concepts, especially for schools with limited access to digital technology. This non-digital media has implications for mathematics learning as a package of learning media with an integration of visual, manipulative, and game-based learning approaches, thus providing alternative responsive practical solutions.
Analysis of Optimal Solutions to Transportation Problems in Broiler Chicken Meat Distribution at PT. Griya Mitra Poultry Using the NWC, VAM, and MODI Methods Yulis Dwi Riyana; Alfina Nur Fazhira; Hesti Widyawati; Rakhmat Dermawan; Lisnani Lisnani; Sumarni
JES-MAT: Jurnal Edukasi dan Sains Matematika Vol. 12 No. 1 (2026): Jurnal Edukasi dan Sains Matematika (JES-MAT)
Publisher : Program Studi Pendidikan Matematika Universitas Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25134/jes-mat.v12i1.53

Abstract

The transportation method is an optimization technique in operations research used to determine the distribution allocation of goods from several sources to several destinations at minimum cost. This study examines the application of the transportation method to the case of broiler chicken meat distribution at PT. Griya Mitra Poultry. The distribution problem involves four production sources (Buyer 1 800 tons, Buyer 2 2,000 tons, Buyer 3 4,000 tons, Buyer 4 1,000 tons) and four distribution destinations (Surabaya 2,500 tons, Gresik 1,500 tons, Sidoarjo 1,800 tons, Jombang 2,000 tons) with total supply = total demand = 7,800 tons (balanced). The study aims to analyze the effectiveness of the North West Corner (NWC), Vogel's Approximation Method (VAM), and Modified Distribution Method (MODI) methods in minimizing distribution costs. The results show that the NWC method produces an initial solution with a total cost of Rp3,105,000 per period. The VAM method produces a better initial solution with a total cost of Rp2,915,000 per period. The MODI method confirms that the VAM solution is optimal because all improvement index values ​​(Iᵢⱼ) ≥ 0. This method is proven to be efficient with a time complexity of O(n3) and is suitable for real applications.