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All Journal Al Khawarizmi: Jurnal Pendidikan dan Pembelajaran Matematika Jurnal Vokasi Mekanika
Surya, Fajar
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Computer Science & IT Education Mathematics Mechanical Engineering

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Analysis of Students' Error in Working on Story Problems Based on Newman's Criteria in Class II MIA 3 Man 3 Padang Surya, Fajar; Edriati, Sofia
Al-Khawarizmi Vol 7, No 2 (2023): Al Khawarizmi: Jurnal Pendidikan dan Pembelajaran Matematika
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/jppm.v7i2.19744

Abstract

The background of this research is that there are still many students who are less interested and motivated in learning mathematics so that many students make mistakes in solving math word problems. The purpose of this research is to identify and identify the types of mistakes made students in working on word problems based on Newman's Error criteria and knowing the causes of students making mistakesIn doing story problems.The research method used is descriptive method with a qualitative approach . The sample of this study were 24 students of class XI MIA 3. The research instrument was tests and interviews. The test results were analyzed based on Newman's criteria, after which students were interviewed based on the types of mistakes made by students.The results of this study indicate that the types of errors made by students based on Newman's criterion analysis consist of 5 errors, namely Reading errors, Comprehension errors, Transformation errors, Process Skill errors and Endcoding errors. The biggest mistake was made at the stage of writing the final answer, namely as much as 46.67%, while the smallest error was made at the stage of understanding the questions, namely as much as 5.33%.
Analysis of Students' Error in Working on Story Problems Based on Newman's Criteria in Class II MIA 3 Man 3 Padang Surya, Fajar; Edriati, Sofia
Al-Khawarizmi Vol 7 No 2 (2023): Al Khawarizmi: Jurnal Pendidikan dan Pembelajaran Matematika
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/jppm.v7i2.19744

Abstract

The background of this research is that there are still many students who are less interested and motivated in learning mathematics so that many students make mistakes in solving math word problems. The purpose of this research is to identify and identify the types of mistakes made students in working on word problems based on Newman's Error criteria and knowing the causes of students making mistakesIn doing story problems.The research method used is descriptive method with a qualitative approach . The sample of this study were 24 students of class XI MIA 3. The research instrument was tests and interviews. The test results were analyzed based on Newman's criteria, after which students were interviewed based on the types of mistakes made by students.The results of this study indicate that the types of errors made by students based on Newman's criterion analysis consist of 5 errors, namely Reading errors, Comprehension errors, Transformation errors, Process Skill errors and Endcoding errors. The biggest mistake was made at the stage of writing the final answer, namely as much as 46.67%, while the smallest error was made at the stage of understanding the questions, namely as much as 5.33%.
Analisis Penambahan Turbin Magnus pada Kapal Tanker 1700 DWT Menggunakan Simulasi Computational Fluid Dynamics Surya, Fajar; Putra, Randi Purnama; Fernanda, Yolli; Qalbina, Fitrah
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 4 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i4.901

Abstract

Turbin magnus merupakan turbin yang berfungsi sebagai sistem propulsi tambahan pada kapal dengan tujuan meningkatkan efisiensi energi dan mengurangi emisi gas buang. Tujuan penelitian ini adalah untuk menganalisis perbandingan performa turbin magnus tipe flettner rotor dan thom rotor terhadap koefisien lift (C?), koefisien drag (Cd), gaya thrust (Fr), serta hambatan total baru kapal (RT New). Metode penelitian menggunakan simulasi berbasis Computational Fluid Dynamics (CFD) dengan menggunakan software Ansys Fluent 2025 R1 Student Version. Hasil penelitian menunjukkan bahwa turbin magnus tipe thom rotor memiliki nilai C? lebih tinggi sebesar 0,3364; 0,3276; 0,3157 pada kecepatan 5 m/s, 10 m/s, dan 15 m/s dibandingkan flettner rotor sebesar 0,2785; 0,2508; 0,2442 pada kecepatan 5 m/s, 10 m/s, dan 15 m/s dengan penurunan nilai lebih stabil pada variasi kecepatan angin. Sedangkan nilai Cd thom rotor sebesar 0,6487; 0,5333; 0,4959 pada kecepatan 5 m/s, 10 m/s, dan 15 m/s juga lebih besar dibandingkan flettner rotor sebesar 0,5705; 0,4537; 0,4229 pada kecepatan 5 m/s, 10 m/s, dan 15 m/s. Perhitungan gaya thrust (Fr) menunjukkan peningkatan signifikan pada kedua tipe rotor seiring kenaikan kecepatan aliran, dengan kontribusi terbesar pada thom rotor. Hambatan total baru kapal (RT New) menurun secara relatif terhadap kondisi awal, menandakan adanya efisiensi propulsi tambahan. Maka penambahan turbin magnus mampu memberikan gaya dorong tambahan, mengurangi hambatan total, serta meningkatkan efisiensi operasional kapal. Thom rotor menghasilkan gaya angkat yang lebih stabil, sementara flettner rotor lebih efisien dalam menekan hambatan, sehingga pemilihan tipe rotor dapat disesuaikan dengan kebutuhan operasional kapal.
Co-Authors Fitrah Qalbina Putra, Randi Purnama Sofia Edriati Yolli Fernanda