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Universitas Buana Perjuangan Karawang
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Efektivitas Media Pembelajaran Interaktif Dalam Meningkatkan Proses Literasi Matematis Siswa Sekolah Dasar
Jurnal Sekolah Dasar Vol. 11 No. 1 (2026): Jurnal Sekolah Dasar
Publisher : LPPM Universitas Buana Perjungan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/p81qfn52

Abstract

Penelitian ini bertujuan untuk mengetahui efektivitas media pembelajaran interaktif dalam meningkatkan proses literasi matematis siswa sekolah. Metode yang digunakan yaitu kuantitatif dengan desain pre-eksperimental one group pretest-posttest design. Populasi dalam penelitian ini pada siswa kelas V SDN Karangligar 1 Tahun Ajaran 2024/2025, dengan jumlah sampel sebanyak 20 siswa. Teknik pengumpulan data menggunakan tes pretest dan posttest untuk mengukur tingkat proses literasi matematis siswa setelah menggunakan media pembelajaran interaktif berbasis PowerPoint. Hasil analisis data menunjukkan adanya peningkatan bahwa nilai rata-rata pada pretest sebesar 71,15 menjadi 84,80 pada nilai posttest. Uji-T menunjukkan nilai signifikansi (Sig. 2-tailed) sebesar 0,000 < 0,005, yang berarti terdapat perbedaan signifikan antara hasil pretest dan posttest. Nilai N-Gain sebesar 0,48 berada pada kategori sedang. Berdasarkan hal tersebut dapat disimpulkan bahwa media pembelajaran interaktif efektif dalam meningkatkan proses literasi matematis siswa sekolah dasar, khususnya pada materi data di kelas V SDN Karangligar 1.
Pengaruh Model Pembelajaran Project Based Learning (PjBL) Terhadap Kemampuan Numerasi Siswa Sekolah Dasar
Jurnal Sekolah Dasar Vol. 11 No. 1 (2026): Jurnal Sekolah Dasar
Publisher : LPPM Universitas Buana Perjungan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/sjkp4v25

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Project Based Learning (PjBL) terhadap kemampuan numerasi siswa kelas III SDN Mekarmulya III pada materi penyajian data. Latar belakang penelitian ini adalah rendahnya kemampuan numerasi siswa yang disebabkan oleh metode pembelajaran konvensional yang kurang melibatkan siswa secara aktif. Penelitian ini menggunakan pendekatan kuantitatif dengan desain pre-eksperimental tipe One Group Pretest-Posttest. Subjek penelitian berjumlah 20 siswa kelas III yang dipilih melalui teknik purposive sampling. Instrumen yang digunakan berupa tes uraian numerasi dengan 10 soal. Hasil analisis menunjukkan peningkatan rata-rata nilai dari 71,05 (pretest) menjadi 84,80 (posttest). Hasil uji Paired Sample t-Test menunjukkan nilai signifikansi sebesar 0,001 (<0,05) dengan t-hitung -12,641, yang berarti terdapat perbedaan signifikan antara hasil pretest dan posttest. Nilai N-Gain sebesar 0,5070 berada dalam kategori sedang, yang menunjukkan bahwa model PjBL cukup efektif dalam meningkatkan kemampuan numerasi siswa. Dengan demikian, model Project Based Learning dapat dijadikan sebagai strategi pembelajaran alternatif yang menyenangkan, bermakna, serta mampu meningkatkan pemahaman matematika siswa, khususnya dalam materi penyajian data di sekolah dasar.
Optimizing Spring-back and Spring-go in Vee-bending of SCGA340BHX Galvanized Steel: A Taguchi Approach
Jurnal Teknik Mesin Mechanical Xplore Vol. 6 No. 1 (2025): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v6i1.10147

Abstract

Spring-back and spring-go are critical elastic recovery phenomena in sheet metal forming that affect the angular precision of bent components. This study investigates the influence of punch angle, die opening, and punch speed on these behaviors during the Vee-bending process of SCGA340BHX high-strength galvanized steel. A Taguchi design of experiments with an L8 orthogonal array was applied, and spring-back angles were measured and analyzed using the “smaller-is-better” signal-to-noise (S/N) ratio criterion. The results reveal that punch angle is the most influential parameter governing spring-back and spring-go tendencies, followed by die opening and punch speed. A punch angle of 50° and a die opening of 35 mm produced the highest average spring-back (3.03°), while spring-go behavior was observed primarily at higher punch speeds (35–40 mm/min). The study further confirmed the inverse relationship between bending force and spring-back, with lower forming forces correlating to greater elastic recovery. These findings provide a comprehensive understanding of the interdependence between geometric and kinematic factors in elastic recovery phenomena, offering quantitative insights for optimizing Vee-bending operations involving thin, high-strength steel.
Performance Evaluation of Rice Husk-Based Catalytic Converters: Emission Reduction and Minimal Engine Power Loss Verified by Dynamometer Test
Jurnal Teknik Mesin Mechanical Xplore Vol. 6 No. 1 (2025): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v6i1.10415

Abstract

Catalytic converters (CCs) play a critical role in reducing exhaust emissions in motor vehicles. This study presents a sustainable solution by utilizing rice husk waste (RHW) to produce activated carbon, which is then fabricated into honeycomb-shaped catalytic converters with thickness variations of 10 mm, 15 mm, 20 mm, and 25 mm. Among these, the 15 mm-thick converter (CC15) exhibited the most effective emission reduction performance, achieving reductions of 78.33% in hydrocarbons (HC) and 48.23% in carbon monoxide (CO). To assess its impact on engine performance, a series of dynamometer tests were conducted, showing that the installation of CC15 led to less than a 6% decrease in both power and torque, which is considered acceptable for daily vehicle use. Furthermore, the air–fuel ratio (AFR) shifted from an average of 13.38 under standard conditions to 14.19 with CC15, indicating stable combustion. Acoustic evaluation also confirmed that the CC did not function as a noise suppressor, resulting in no significant alteration to engine acoustics. Overall, the CC15 demonstrates an effective balance between environmental performance and engine efficiency, offering a practical emission control solution based on locally sourced agricultural waste.
Co-Authors Andes Safarandes Asmara, Andes Safarandes Ayu Fitri Suparman, Tarpan