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All Journal SAINSMAT Jurnal Statistika Universitas Muhammadiyah Semarang Jurnal Pendidikan Matematika RAFA Jurnal Edukasi Matematika dan Sains AKSIOMA Jurnal Penelitian Pendidikan IPA (JPPIPA) EnviroScienteae BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal GEOSAPTA Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam MAJAMATH: Jurnal Matematika dan Pendidikan Matematika J SIG (Jurnal Sains Informasi Geografi) FIBONACCI: Jurnal Pendidikan Matematika dan Matematika (JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING MATHEMA: JURNAL PENDIDIKAN MATEMATIKA ESTIMASI: Journal of Statistics and Its Application Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jambura Journal of Mathematics Education JAMBURA JOURNAL OF PROBABILITY AND STATISTICS Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Journal of Science and Technology Research in the Mathematical and Natural Sciences SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam Indonesian Research Journal on Education Innovative: Journal Of Social Science Research Madani: Multidisciplinary Scientific Journal Lemma: Letters of Mathematics Education Journal of Mathematics, Computation and Statistics (JMATHCOS) Media Pendidikan Matematika
Dewi Rahmawaty Isa
Universitas Negeri Gorontalo
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Pemodelan Data Time Series dengan Pendekatan Regresi Nonparametrik B-Spline Rahasia, Zulaiha; Resmawan, Resmawan; Isa, Dewi Rahmawaty
AKSIOMA : Jurnal Matematika dan Pendidikan Matematika Vol 11, No 1 (2020): AKSIOMA: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/aks.v11i1.4903

Abstract

Spline is one of the nonparametric approach, to adjust data so the final model has good flexibility. The purpose of this research is to model the time series data in the form of currency exchange rates by using the nonparametric B-spline approach. In B-spline modelling, determination of the order for the model, and the number and the placement of the knot are the criteria that must be considered. The best B-spline model obtained based on the selection of the optimal knot points with minimum Generalized Cross Validation (GCV) criteria. The modelling in this research use data on the exchange rate of the rupiah toward the US dollar in the period January 2014 - December 2018. The best B-spline model obtained by the 2 point knot approach, at points 11935.10 and 12438.29, with GCV valueequals to 55683.09.Keywords: Nonparametric Regression; B-Spline; Generalized Cross Validation
Analysis of Limestone Characteristics on the South Coast of Gorontalo Based on Specific Gravity and Water Absorption Tests Permana, Aang Panji; Hutagalung, Ronal; Eraku, Sunarty Suly; Isa, Dewi Rahmawaty
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.7368

Abstract

The southern coast of Gorontalo has complex geological conditions. This is indicated by the strong tectonic influence with the uplift of the Quaternary limestone at high elevations. The distribution of this limestone is very unique because it is located between the dominance of volcanic and plutonic rocks that form the northern arm of Sulawesi. The purpose of this study was to focus on the characteristics of limestone on the south coast of Gorontalo based on specific gravity and water absorption tests. The research methods used to achieve these objectives consist of field geological surveys and laboratory analysis of the specific gravity and water absorption tests of coarse aggregate. The field geological survey consisted of taking limestone samples for laboratory analysis and petrological analysis. The results showed that the limestone on the southern coast of Gorontalo is dominated by the coralline floatstone facies. Characteristics of the coralline floatstone facies based on laboratory analysis showed an average specific gravity of 1.74 and an apparent specific gravity of 2.04. While the average percentage of limestone water absorption is 8.41%.
PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA SISWA KELAS VIII SMP Mootalu, Nurnaningsi; Zakaria, Perry; Isa, Dewi Rahmawaty
JURNAL LEMMA Vol 12, No 1 (2025): Lemma: Letters of Mathematics Education
Publisher : Universitas PGRI Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22202/jl.2025.v12i1.10560

Abstract

 Penelitian ini bertujuan untuk menentukan adanya perbedaan penggunaan model pembelajaran Problem Based Learning (PBL) terhadap kemampuan pemecahan masalah matematika siswa pada materi bilangan berpangkat. Metode penelitian ini yaitu metode kuasi eksperimen (Quasi Experimental) dengan desain penelitian post-test control design. Pengambilan sampel menggunakan teknik random sampling dengan jumlah sampel sebanyak 47 siswa SMPN 1 Talaga Jaya  dibagi ke dalam kelas control dan kelas eksperimen. Hasil penelitian menunjukkan adanya perbedaan kemampuan pemecahan masalah matematika siswa setelah melakukan pembelajaran menggunakan PBL dengan hasil belajar siswa berdasarkan rata-rata nilai posttest untuk kelas eksperimen sebesar 61,58 dan kelas kontrol sebesar 56,43. Adapun hasil uji hipotesis menggunakan uji hipotesis (t-test) pada excel menggunakan analysis toolpak (t-Test: Paired Sample for Means) mendapatkan hasil sebesar 3,346 < 2,014 dengan α (0,05). Hal ini berarti menunjukkan bahwa terdapat perbedaan nilai posttest yang signifikan antara kelas eksperimen dan kelas kontrol.
Deskripsi kemampuan matematika berdasarkan domain kognitif TIMSS Kelas VIII SMP Negeri 3 Gorontalo Usman, Rina Nandrawati; Bito, Nursiya; Isa, Dewi Rahmawaty
Media Pendidikan Matematika Vol. 10 No. 1 (2022)
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/mpm.v10i1.4874

Abstract

Penelitian ini bertujuan untuk mendeskripsikan kemampuan matematika siswa berdasarkan domain kognitif Timss kelas VIII SMP Negeri 3 Gorontalo.Subjek dalam penelitian ini adalah siswa kelas VIII di SMP Negeri 3 Gorontalo.Pengumpulan data diperoleh dari data hasil tes kemampuan matematika berdasarkan domain kognitirf TIMSS dan wawancara yang digunakan sebagai data tambahan untuk mendeskripsikan kemampuan matematika berdasarakan domain kognitif TIMSS. Berdasarkan data yang diperoleh dari hasil tes kemampuan matematika dari 25 siswa terdapat 5 orang siswa dalam kategori tinggi dengan besar presentase 22,61%, 16 orang siswa dalam kategori sedang dengan besar presentase 57,27%, dan 4 orang dalam kategori rendah dengan besar presentase 11,61%. Artinya tingkat kemampuan matematika siswa berdasarkan domain kognitif Timss kelas VIII SMP Negeri 3 Gorontalo berada dalam kategori sedang.
Co-Authors Abdul Wahab Abdullah Agusyarif Rezka Nuha Asriadi Asriadi Asriadi Bertu Rianto Takaendengan Bilondatu, Rosna Ningsih Brahim, Annisa Maharani Bukoting, Nitrawati D Une, Putri Mutia Dita, Alvia Djikilo, Fadila A Hamani, Mohamad Taufik Hanifa Hasan S. Panigoro Hendro Budi Santoso Hulukati, Evi P. Hutagalung, Ronal Iman, Rivo Syahputra Ismail Djakaria Isran K Hasan Ivan Taslim Jufrin Jufrin Kadir, Ervina Kartin Usman Khairiah, Laelatul Kudo, Syafri Yandi La Ode Nashar Lailany Yahya LIHAWA, SRIRAPI H Mahmud, Sri Lestari Majid Majid Majid, Majid Mamonto, Putri Yanti Modeong, Fakhira Moh. Wahyu Warolemba Mootalu, Nurnaningsi Muliling, Restika Oktavia NISKY IMANSYAH YAHYA Novianita Achmad Nur Fajriani Podungge Nur, Sholihin P. Nurma, Nurhayati Hasim Nursiya Bito Nurwan Nurwan Nurwan, Nurwan Permana, Aang Panji Perry Zakaria Putri, Dewi Tarisa Rahasia, Zulaiha Rahasia, Zulaiha Rahman, Yulinar RAHMAWATY AHMAD Resmawan Resmawan Rizky Amalia Y Lamaka Ronal Hutagalung Rosiana Jupri Salmun K. Nasib Sauwera, Arpina Siti Zakiah Sofyan Nuna Suaib, Angki Sumarno Ismail Sunarty Suly Eraku Suparman M Ismail Syamsu Qomar Badu Tedy Machmud Usman, Rahmat Setiawan Usman, Rina Nandrawati Usman, Sri Adiningsi B. Winni A. Pakaya Yamin Ismail