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All Journal Jurnal Fisika Unand Mutiara: Multidiciplinary Scientifict Journal
Rani, Dwi
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Arts Earth & Planetary Sciences Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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Penerapan Strategi Pembelajaran Berdiferensiasi Untuk Meningkatkan Hasil Pembelajaran Bahasa Indonesia Sari HS, Dyan Wulan; Mardiana, Mardiana; Wita, Nora; Meilani, Frisa; Rani, Dwi
Mutiara: Multidiciplinary Scientifict Journal Vol. 3 No. 6 (2025): Mutiara: Multidiciplinary Scientifict Journal
Publisher : Al Makki Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57185/mutiara.v3i6.383

Abstract

The aim of this study was to determine the implementation of differentiated learning strategies to improve student learning outcomes. The research used an action research method, with procedures including planning, implementation of actions, observation, and reflection. The data analysis techniques used were quantitative and qualitative data. The analysis results showed: 1) The Pre-Cycle Test results indicated that out of 17 students, 7 students (41.18%) achieved the minimum mastery criteria (KKM), while 10 students (58.82%) did not; 2) The Pretest in Cycle I showed that 9 students (52.94%) were successful, while 8 students (47.06%) were not; 3) The Posttest in Cycle I indicated that 12 students (70.59%) were successful, while 5 students (29.41%) were not; 4) The Posttest in Cycle II showed that 15 students (88.23%) were successful, while 2 students (11.77%) were not. The discussion results in Cycle I showed that the percentage of student learning mastery was 70.59%, while in Cycle II it increased to 88.23%, indicating an improvement in learning outcomes by 17.64%, meaning that the minimum mastery criteria (KKM) was achieved in Cycle II.
Identifikasi Pencemaran Air Sungai Batanghari Di Kecamatan Sitiung Kabupaten Dharmasraya Berdasarkan Tinjauan Fisik dan Kimia Rani, Dwi; Afdal, Afdal
Jurnal Fisika Unand Vol 9 No 4 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.9.4.510-516.2020

Abstract

Penelitian ini bertujuan untuk menentukan tingkat pencemaran air sungai Batanghari di Sitiung Dharmasraya berdasarkan derajat keasaman (pH) temperatur, konduktivitas listrik, total padatan terlarut (TDS), dan kandungan logam berat Hg (Merkuri) dan Pb (Timbal). Pengambilan sampel dilakukan  sebanyak enam titik di sepanjang aliran sungai segmen Sitiung. Semua parameter diukur langsung di lapangan, kecuali kandungan logam berat. Pengukuran kandungan logam berat Hg dan Pb dilakukan menggunakan Atomic Absorbtion Spectroscopy. Analisis tingkat pencemaran menggunakan metode Indeks Pencemaran air (IP). Hasil penelitian menunjukan bahwa nilai rata-rata pH total air sungai segmen Sitiung adalah 8,73 dan telah melebihi ambang batas baku mutu. Secara keseluruhan temperatur air di sungai Batanghari pada segmen ini tidak melebihi ambang batas baku mutu. Nilai konduktivitas listrik sampel air berkisar antara 34,3 dan 62,7 μS/cm dengan rata-rata total yaitu 56,63 μS/cm. Nilai TDS rata-rata adalah 29,7 ppm yang termasuk ke golongan fresh water. Nilai tertinggi kandungan Pb dalam sampel adalah 0,0034 mg/l dan Hg sebesar 0,0024 mg/l yang telah berada di atas nilai ambang batas baku mutu sebesar 0,001 mg/l. Berdasarkan nilai Indeks Pencemaran air (IP), DAS Batanghari di Sitiung dikategorikan tercemar ringan dengan nilai IP rata-rata sebesar 1,193. This study aims to determine the level of water pollution in the Batanghari Sitiung Dharmasraya river based on the degree of acidity (pH), temperature, electrical conductivity, total dissolved solids (TDS), and the content of heavy metals Hg (Mercury) and Pb (Lead). Sampling was carried out at six points along the Sitiung segment river flow. All parameters are measured directly in the field, except for heavy metal content. Measurement of heavy metal content Hg and Pb was done using Atomic Absorbtion Spectroscopy. Pollution level analysis uses the Water Pollution Index (IP) method. The results showed that the average pH value is 8.73 and exceed the quality standard threshold. Overall water temperature does not exceed the quality standard threshold. Electrical conductivity values of water samples ranged from 34.3 and 62.7 μS/cm with average of 56.63 μS/cm. The average TDS value is 29.7 ppm which belongs to the fresh water group. The highest value of Pb content in the sample is 0.0034 mg/l and Hg is 0.0024 mg/l which is above the quality standard threshold value of 0.001 mg/l. Based on the value of water pollution index (IP), the Batanghari river in Sitiung is categorized as mildly polluted with an average IP value of 1.193.
Co-Authors Afdal Afdal, Afdal Dyan Wulan Sari Hs Mardiana Mardiana Meilani, Frisa Wita, Nora