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All Journal Jurnal Pendidikan Teknik Mesin Undiksha
I Nyoman Pasek Nugraha
Pendidikan Teknik Mesin, Universitas Pendidikan Ganesha, Bali
Automotive Engineering Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Model Pembelajaran Kooperatif Type PJBL Terhadap Hasil Belajar System Tata Udara Teknik Elektronika Siswa Kelas XI TE Di SMK N 3 Singaraja: The Influence of Project-Based Learning Model on Learning Outcomes of Air Conditioning Systems in Electronic Engineering Department at State Vocational School 3 Singaraja Kadek Karuna Wibawa; Edi Elisa; I Nyoman Pasek Nugraha
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 14 No. 2 (2026)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v14i2.115089

Abstract

The low learning outcomes of students in the Air Conditioning System course indicate the need for an instructional model that can enhance student engagement and improve the quality of the learning process. Project-Based Learning (PjBL) is an instructional model that is well suited to vocational education because it integrates conceptual understanding with practical experience through project completion. This study aimed to analyze the effect of implementing Project-Based Learning on the learning outcomes of eleventh-grade students in the Electronics Engineering Program at SMK Negeri 3 Singaraja. This study employed a quantitative approach using a pre-experimental method with a one-group pretest–posttest design. The study population consisted of 58 students, while the research sample comprised 29 eleventh-grade Electronics Engineering students. Data were collected using a multiple-choice objective test that had been validated through content validity assessment. The data were analyzed using descriptive statistics, normality and homogeneity tests, N-Gain analysis, and a paired-samples t-test with the assistance of SPSS software. The results showed that the mean learning outcome increased from 72.55 on the pretest to 82.00 on the posttest. The average N-Gain score was 0.7501, which falls into the high category, while the paired-samples t-test yielded a significance value of 0.001 (p < 0.05). These findings indicate that the implementation of Project-Based Learning has a positive and significant effect on students' learning outcomes in the Air Conditioning System course. Therefore, Project-Based Learning can be considered an effective instructional model for improving the quality of teaching and learning as well as students' competency achievement in technical and vocational education.
Pengaruh Variasi Temperatur Curing Terhadap Kekuatan Tarik Biokomposit Getah Damar Diperkuat Serbuk Kayu Jati: Effect of Curing Temperature Variation on the Tensile Strength of Damar Resin Biocomposites Reinforced with Teak Wood Powder Ngurah Putu Putra Adnyana; I Nyoman Pasek Nugraha; Kadek Rihendra Dantes; Kadek Sutrisna
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 14 No. 2 (2026)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v14i2.120136

Abstract

This study aimed to analyze the effect of curing temperature variation on the tensile strength of dammar resin-based biocomposites reinforced with teak wood powder. The biocomposite consisted of 60% dammar resin as the matrix and 40% teak wood powder as the reinforcement. The curing temperatures were varied at 50°C, 100°C, and 150°C with a holding time of 1 hour. The specimens were fabricated according to the ASTM D3039 standard and tested using a Universal Testing Machine (UTM). The evaluated parameters included tensile strength, strain, elastic modulus, and fracture characteristics. The results showed that increasing the curing temperature improved the mechanical properties of the biocomposite. The average tensile strength at curing temperatures of 50°C, 100°C, and 150°C was 408.64 kPa, 507.37 kPa, and 534.80 kPa, respectively. The elastic modulus also increased from 31,153.33 kPa at 50°C to 429,003.33 kPa at 150°C. Fracture surface observations indicated that higher curing temperatures enhanced the interfacial bonding between the dammar resin matrix and teak wood powder, resulting in improved tensile performance. Therefore, a curing temperature of 150°C produced the best mechanical properties and is recommended as the optimum curing condition for dammar resin biocomposites reinforced with teak wood powder.
Co-Authors Edi Elisa Kadek Karuna Wibawa Kadek Rihendra Dantes Kadek Sutrisna Ngurah Putu Putra Adnyana