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All Journal Edu Sains: Jurnal Pendidikan Sains dan Matematika Spektrum Sipil
Yuliana, Lili
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Civil Engineering, Building, Construction & Architecture Education Engineering Transportation

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The influence of guided inquiry models on students' science processing skills through reflex movement practicum Yuliana, Lili; Lissa, Lissa; Subkhi, Nur
Edu Sains: Jurnal Pendidikan Sains & Matematika Vol 12 No 2 (2024): VOLUME 12 NOMOR 2 DESEMBER 2024
Publisher : IAIN Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23971/eds.v12i2.9091

Abstract

The importance of Science process skills (SPS) in education is that as SPS develops, essential competencies will also improve, including students' scientific attitudes and problem-solving skills. SPS are still rarely assessed because teachers generally measure only cognitive learning outcomes. This research aims to determine the effect of the guided inquiry model on students' science process skills through a reflex movement practicum at SMAN 1 Lohbener. This quantitative research uses a quasi-experimental method with a posttest-only control design. The population of this study consists of XI MIPA, with the sample being class XI MIPA 1 as the experimental group with 16 students and XI MIPA 2 as the control group with 20 students. The instrument used was an essay test sheet on SPS based on five indicators: observing, classifying, predicting, concluding, and communicating (Hastuti & Wiyanto, 2019). The research results showed that the average score for the experimental class was 13,56, while the control class scored 10,95, with a significant level (α) = 0,05, S2gab = 6,48, tcount = 3,06 and t-table = 2,03. Because tcount > table, thus, hypothesis (Ho) is rejected. That means the guided inquiry model affects students' science process skills in the reflex movement practicum at SMAN 1 Lohbener.
STABILISASI TANAH LEMPUNG MENGGUNAKAN SERBUK GYPSUM, ABU SEKAM PADI, DAN KAPUR: Stabilization of Clay Using Gypsum Powder, Rice Husk Ash, and Lime Yuliana, Lili; Sarie, Fatma; Gandi, Suradji
Spektrum Sipil Vol 9 No 2 (2022): SPEKTRUM SIPIL
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/spektrum.v9i2.228

Abstract

Tanah adalah dasar dalam berbagai konstruksi yang sangat penting. Namun tidak semua tanah dapat digunakan untuk pembangunan konstruksi. Suatu konstruksi akan berdiri dengan tegak bila tanah dasar dibawahnya cukup kuat untuk mendukungnya. Ruas Jalan BPP, Kecamatan Selat, Kabupaten Kapuas, Kalimantan Tengah memiliki jenis tanah lempung dengan nilai daya dukung tanah yang rendah, sehingga dapat berpengaruh pada kerusakan bangunan yang berada di atasnya. Oleh karena itu perlu adanya perbaikan tanah dengan penambahan bahan campuran serbuk gypsum, abu sekam padi, dan kapur. Tujuan penelitian adalah untuk mengetahui pengaruh penambahan serbuk gypsum, abu sekam padi, dan kapur terhadap nilai CBR pada tanah lempung melalui pengujian sifat-sifat fisik dan mekanik tanah asli. Berdasarkan klasifikasi AASHTO tanah tergolong kelompok A-7-6 (10) sedangkan berdasarkan USCS tanah tergolong kelompok CH, yaitu tanah lempung anorganik dengan plastisitas tinggi, lempung berpasir, lempung berlanau. Nilai presentasi kadar air (w) = 56,12%; berat isi (gd ) = 0,98 g/cm3; berat jenis (Gs) = 2,69; batas-batas Atterberg yaitu Batas Cair (LL) = 51,20%; Batas Plastis (PL) = 26,78%; Indeks Plastisitas (PI) = 24,42%; Batas Susut (SL) = 25,57%. Berdasarkan hasil analisis saringan persentase lolos saringan No.200 = 52,80%. Setelah dilakukan pengujian stabilisasi tanah didapat nilai pemadatan untuk sampel tanah asli OMC = 32,18% dan gdmax = 1,28 (g/cc). Hasil pengujian CBR menunjukkan persentase nilai CBR sampel tanah asli sebesar 2,20%. Tanah dengan campuran serbuk gypsum, abu sekam padi dan kapur variasi 2%, 5%, 7%, 9% dengan rendaman 0 hari nilai CBR  sebesar 3,05%, 3,80%, 4,51%.
Co-Authors Gandi, Suradji Lissa, Lissa Sarie, Fatma Subkhi, Nur