Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika
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PENGEMBANGAN MEDIA VIDEO INTERAKTIF PENDEKATAN PEMBELAJARAN VAN HIELE PADA MATERI BANGUN RUANG SISI DATAR
No full textThe topic of mathematical geometry, which explores shapes such as cubes, rectangular prisms, prisms, and pyramids, often presents challenges for students, particularly in visualizing these shapes and relating them to real-life situations. These difficulties require a solution in the form of technology-based learning media capable of presenting material progressively and engagingly. The Van Hiele learning approach was selected as it offers a systematic framework for understanding geometric concepts, ranging from visualization to abstract comprehension. This study aims to develop interactive video media based on the Van Hiele approach for teaching three-dimensional geometric shapes to eighth-grade students. The method used is Research and Development (R&D) with the ADDIE development model, which includes the stages of analysis, design, and development. Data analysis was conducted through needs assessments and validation by subject matter experts and media experts. The validation results show that the developed interactive video media received an average score of 86.80% from subject matter experts and 87.68% from media experts, with an overall average score of 87.24%. These findings indicate that the developed interactive video media is highly valid and ready to be used as an effective and enjoyable learning tool to enhance students\u27 understanding of three-dimensional geometric shapes
Teacher Scheduling Optimization with Linear Programming
No full text Scheduling is very important in teaching activities, especially for teachers who have been certified to fulfill their teaching obligations at least 24 hours a week. So it is necessary to prepare an appropriate schedule. This research aims to optimize teacher scheduling at SMK Negeri 1 Pantai Labu using the linear programming method. The data used is data on the number of teachers and classes at SMK Negeri 1 Pantai Labu. Completion of the simplex method, determining the optimum and feasible solution is obtained if the values in the Z row are all positive. Based on the research results, it was found that the minimum number of teachers needed in 1 period (6 days) was 69 teachers, with the minimum number of teachers starting work on the second day being 5 teachers, the minimum number of teachers starting work on the third day being 6 teachers, the minimum number of teachers There were 5 teachers who started working on the fourth day and the minimum number of teachers who started working on the fifth day was 5 teachers
PENERAPAN METODE SIMPLEKS DENGAN MICROSOFT EXCEL SOLVER UNTUK OPTIMALISASI BLENDING BATUBARA SESUAI KRITERIA KONSUMEN
No full textBatubara yang tersedia sering kali tidak sesuai dengan kriteria konsumen dan perusahaan dituntut untuk memenuhi kriteria konsumen tersebut. Jika batubara yang dijual tidak sesuai kesepakatan maka konsumen berhak membatalkan kontrak ataupun memberikan pengurangan harga kepada perusahaan. Salah seorang konsumen PT X membutuhkan batubara dengan kriteria kualitas sebagai berikut ash (ASH) 6,50 %, total moisture (TM) 49 %, total sulphur (TS) 0,80 % dan calorific value (CV) 3200 kkal/kg. Untuk menyesuaikan kriteria kualitas yang diinginkan konsumen perlu dilakukan pencampuran (blending) batubara. Tujuan penelitian ini adalah optimalisasi blending batubara menggunakan metode simpleks dengan bantuan Microsoft Excel Solver sehingga diperoleh komposisi blending yang tepat dengan kualitas yang sesuai dengan keinginan konsumen dan pemanfaatan batubara berkualitas rendah dapat optimal. Perhitungan metode simpleks dengan bantuan Microsoft Excel Solver ini sangat mendekati kriteria konsumen sehingga dapat direkomendasikan kepada pihak perusahaan. Dengan menggunakan metode simpleks untuk permintaan konsumen sebanyak 50.000 ton batubara diperoleh komposisi yang berasal dari batubara lapisan 2C sebanyak 20.833,3 ton dan batubara lapisan 3A sebanyak 29.166,7 ton atau dengan persentase 41,67% dari batubara lapisan 2C dan 58,33% dari batubara lapisan 3A. Kriteria kualitas yang dihasilkan mendekati kriteria konsumen yaitu ash (ASH) 3,95 %, total moisture (TM) 48,97 %, total sulphur (TS) 0,57 % dan calorific value (CV) 3200 kkal/kg. Dilihat dari komposisi dan kualitas batubara yang dihasilkan menunjukkan bahwa lapisan batubara 3A yang berkalori rendah dapat dimanfaatkan secara optimal karena memiliki komposisi yang lebih besar dibandingkan batubara lapisan lain. Selain itu kriteria yang diinginkan konsumen juga dapat terpenuhi
Penerapan Model Geometric Brownian Motion Untuk Prediksi Saham dan Analisis Risiko Kerugian
No full textThis study aims to predict the stock price of Apple Inc. (AAPL) using the Geometric Brownian Motion (GBM) model and to analyze risk through a Monte Carlo Simulation-based Value at Risk (VaR) approach. Daily stock price data of Apple Inc. from January 1, 2022, to December 31, 2024, is used and split into training and testing datasets. The data analysis techniques involve calculating stock returns using the geometric return approach, testing normality with the Kolmogorov-Smirnov test, estimating GBM model parameters, simulating stock prices using Monte Carlo simulation in R software, evaluating prediction accuracy with Mean Absolute Percentage Error (MAPE), and assessing risk using Value at Risk (VaR) along with backtesting. The results show that the GBM model has good accuracy, with a Mean Absolute Percentage Error (MAPE) of 12.32%. The VaR risk analysis at 95% and 99% confidence levels shows no violations, indicating a conservative model. This study contributes to stock price prediction and investment risk management
Pengaruh Model Problem Based Learning Menggunakan Quizwhizzer Sebagai Game Interaktif Terhadap Kemampuan Numerasi Siswa
No full textAbstrak. Penelitian ini bertujuan untuk mengetahui pengaruh penerapan model problem based learning menggunakan Quizwhizzer sebagai game interaktif terhadap kemampuan numerasi siswa. Penelitian ini menggunakan pendekatan kuantitatif dengan desain Quasi Eksperimen dan Nonequivalent Control Group Design. Sampel yang digunakan terdiri dari dua kelas yaitu kelas VII B sebagai kelas eksperimen dan kelas VII A kelas kontrol. Sampel dipilih menggunakan teknik purposive sampling. Hasil penelitian menunjukan bahwa pada pretest nilai rata-rata tertinggi di kelas eksperimen adalah 20,39 sedangkan di kelas kontrol sebesar 19,17. Sementara itu, pada posttest nilai rata-rata tertinggi di kelas eksperimen mencapai 37,61 dan di kelas kontrol sebesar 31,69. Hasil uji hipotesis menggunakan Mann-Whitney U-Test menghasilkan nilai signifikansi sebesar 0,020. Berdasarkan temuan tersebut, dapat disimpulkan bahwa terdapat pengaruh penerapan model problem based learning menggunakan Quizwhizzer sebagai game interaktif terhadap kemampuan numerasi siswa.
Kata Kunci: Kemampuan Numerasi, Problem Based Learning , Quizwhizzer
Abstract. This study aims to determine the effect of applying problem-based learning model using Quizwhizzer as an interactive game on students\u27 numeracy skills. This study used a quantitative approach with a Quasi Experiment design and Nonequivalent Control Group Design. The sample used consisted of two classes, namely class VII B as the experimental class and class VII A as the control class. Samples were selected using purposive sampling technique. The results showed that in the pretest, the highest average value in the experimental class was 20.39 while in the control class it was 19.17. Meanwhile, in the posttest, the highest average value in the experimental class reached 37.61 and in the control class it was 31.69. The results of hypothesis testing using the Mann-Whitney U-Test resulted in a significance value of 0.020. Based on these findings, it can be concluded that there is an effect of applying the problem-based learning model using Quizwhizzer as an interactive game on students\u27 numeracy skills.
Keywords: Numeracy Skills, Problem Based Learning, Quizwhizzer
Pengembangan Modul Ajar Matematika Berbasis Literasi Terintegrasi Budaya Luwu di Sekolah Dasar
No full textproject aimed at developing and producing a teaching module that meets the criteria of validity, effectiveness, and efficiency. The research design adopts the ADDIE development model, which consists of five phases: Analysis, Design, Development, Implementation, and Evaluation. The subjects of this study were 30 fifth-grade students in phase C. Data were collected through lesson implementation observation sheets, student and teacher response questionnaires, and student learning outcome tests. Data analysis involved pretest and posttest results using normality tests, homogeneity tests, and paired sample t-tests. The research results are as follows: (1) Expert validation from content experts, literacy experts, and cultural experts indicated that the module aligns with the learning objectives in terms of content, language, and literacy-based mathematical culture in elementary schools, achieving an average score of 91% categorized as very valid; (2) The developed module received student responses with an average of 89% and teacher responses of 88%, both interpreted as very practical; (3) Learning using the literacy-based mathematics teaching module integrated with Luwu culture was effective in improving student literacy, with an average N-Gain score of 0.62 (moderate category), lesson implementation reaching 88%, and student activity reaching 91.96%
Optimasi Biaya Distribusi Brownies Amanda Samarinda dengan Metode North West Corner dan Stepping Stone
No full textEfficient product distribution is one of the keys to the success of business operations, especially for culinary businesses with a wide sales network such as Brownies Amanda in Samarinda City. With two main outlets, which function as distribution centers, product delivery to several sales points in strategic locations requires optimal logistics cost planning. This study aims to determine a distribution scheme that minimizes the total shipping cost from two outlets located on Jalan Ahmad Yani and Jalan Bung Tomo to four sales points, namely on Jalan Wahid Hasyim, Jalan Slamet Riyadi, Jalan Bhayangkara, and Jalan Ampera (Palaran). The method used in this study is the classic approach in operations research, namely the North West Corner method to obtain an initial solution, which is then refined using the Stepping Stone method to achieve an optimal solution. Based on calculations and analysis, it was found that the optimal solution resulted in a total distribution cost of Rp 111.000, - with a shipping allocation that meets all demand and does not exceed the capacity of each outlet
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe STAD dengan Pendekatan Sosial Emosional Terhadap Motivasi dan Hasil Belajar Matematika
No full textRendahnya motivasi dan hasil belajar matematika siswa menunjukkan perlunya pembelajaran yang tidak hanya berfokus pada aspek kognitif, tetapi juga mengembangkan aspek sosial dan emosional peserta didik. Penelitian ini bertujuan untuk menganalisis pengaruh penerapan model pembelajaran kooperatif tipe Student Teams Achievement Division (STAD) dengan pendekatan sosial emosional terhadap motivasi dan hasil belajar matematika peserta didik kelas VII SMP Negeri 13 Makassar. Penelitian ini merupakan pre-experimental design dengan pendekatan kuantitatif, menggunakan rancangan one group pretest-posttest design. Sampel penelitian terdiri atas 35 peserta didik kelas VII.1 yang dipilih melalui teknik cluster random sampling. Data dikumpulkan menggunakan angket motivasi belajar dengan lima indikator utama (ketekunan, minat, tanggung jawab, kemandirian, dan partisipasi) serta tes hasil belajar matematika berbentuk pilihan ganda. Analisis data dilakukan secara deskriptif dan inferensial menggunakan uji t (paired sample t-test). Hasil penelitian menunjukkan peningkatan signifikan pada kedua variabel. Motivasi belajar meningkat dari kategori sedang (rata-rata 69,20) menjadi tinggi (87,95) dengan N-Gain 0,72, sedangkan hasil belajar meningkat dari 70,10 menjadi 89,74 dengan N-Gain 0,86 dan ketuntasan klasikal 85%. Nilai Sig. (2-tailed) = 0,000 < 0,05 menunjukkan adanya pengaruh signifikan penerapan model terhadap peningkatan motivasi dan hasil belajar. Temuan ini menegaskan bahwa integrasi pendekatan sosial emosional dalam pembelajaran kooperatif STAD efektif dalam menciptakan suasana belajar kolaboratif dan empatik yang mendukung peningkatan prestasi belajar matematika siswa
Aplikasi Holt’s Linear Trend Exponential Smoothing dalam Prediksi Harga Emas di Indonesia
No full textHarga emas merupakan salah satu indikator ekonomi yang penting dan sering dijadikan acuan dalam kegiatan investasi serta kebijakan keuangan. Tren harga emas yang meningkat namun fluktuatif menimbulkan kebutuhan untuk melakukan peramalan jangka pendek guna mendukung pengambilan keputusan investasi. Penelitian ini bertujuan untuk memprediksi harga emas di Indonesia menggunakan metode Holt’s Linear Trend Exponential Smoothing. Data yang digunakan berupa harga emas bulanan dari Desember 2024 hingga November 2025 yang diperoleh dari PT Aneka Logam Indonesia. Model diestimasi menggunakan parameter pemulusan dan dengan asumsi awal dan . Hasil penelitian menunjukkan bahwa nilai Mean Absolute Percentage Error (MAPE) yang diperoleh dari perhitungan sebesar 6,47%, yang termasuk dalam kategori prediksi sangat akurat. Prediksi harga emas pada bulan Desember 2025 adalah Rp 2.710.325,21, dengan kisaran antara Rp 2.534.955,33 hingga Rp 2.885.695,09. Temuan ini menunjukkan bahwa metode Holt’s Linear Trend Exponential Smoothing efektif digunakan untuk peramalan jangka pendek, khususnya untuk prediksi satu bulan ke depan pada deret waktu dengan pola tren linier tanpa komponen musiman. Penelitian selanjutnya dapat mengevaluasi kinerja metode ini pada periode data yang lebih panjang atau membandingkannya dengan metode peramalan lain untuk memperoleh hasil prediksi yang lebih stabil dan komprehensif
Menumbuhkan Kreativitas dalam Matematika: Analisis Sistematis Kemampuan Berpikir Kreatif Matematis dan Faktor Afektif yang Mempengaruhinya
No full textThis study aims to conduct a systematic review of mathematical creative thinking abilities and the affective factors that influence them based on national and international research findings. This study will piece together the pieces of the “puzzle” into a comprehensive big picture, resulting in evidence-based and theoretically sound recommendations. This study uses the Systematic Literature Review (SLR) method with a descriptive analytical approach to empirical articles published between 2020 and 2025 in accredited national journals and reputable international journals. The results of the analysis show that mathematical creative thinking skills, which include indicators of fluency, flexibility, originality, and detail of ideas, have improved through the application of innovative and student-centered learning models, such as Creative Problem Solving, Project-Based Learning, SAVI, the Lesson Study-based Problem Solving model, and the Indonesian Realistic Mathematics Education approach. In addition to learning strategies, a number of affective factors such as self-efficacy, self-regulated learning, motivation, perception of creativity, and learning style were found to contribute positively to the development of mathematical creativity. Conversely, mathematical anxiety was found to be an inhibiting factor that reduced flexibility and fluency of thinking. Additional findings also showed that computational thinking and perception of creativity played an important mediating role in the relationship between self-confidence and mathematical creative thinking skills. Overall, the study results emphasize the importance of a holistic approach that combines pedagogical innovation with strengthening students\u27 affective aspects in an effort to develop mathematical creative thinking skills. Educators should not only focus on technical pedagogical training for teachers, but also provide guidance on managing students\u27 psychological aspects. The synergy between innovative teaching methods and an emotionally supportive learning environment will be a major factor in producing a generation that is mathematically competent and creative