Kriswanto Kriswanto
Universitas Negeri Semarang

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Development of a mobile expert system for the diagnosis on motorcycle damage using forward chaining algorithm Rizqi Fitri Naryanto; Mera Kartika Delimayanti; Kriswanto Kriswanto; Ari Dwi Nur Indriawan Musyono; Imam Sukoco; Mohamad Naufal Aditya
Indonesian Journal of Electrical Engineering and Computer Science Vol 27, No 3: September 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v27.i3.pp1601-1609

Abstract

Indonesia is an ASEAN country with the most motorcycle users, where one-third of its population own motorcycles. The automatic motorcycle is the most widely used type due to its agility and fuel-efficient abilities. Sudden motorcycle damage could hamper the users' activities. However, most of these users do not know the reason for the damage. This paper presents the development of expert system for diagnosing the damage of motorcycle using forward chaining method. This system was implemented in mobile application. Through a mobile application, a solution for these users can be obtained. This application immediately discovers the damaged location and repair process. Furthermore, it acts as the first solution before motorcycle repair is carried out in a shop. In this study, the forward chaining method was implemented. It is based on a pattern-matching algorithm whose primary objective is to match facts (input data) with appropriate rules from the rule base. Various test results showed that the diagnostic application used for automatic motorcycle damages 100% worked.
MACHINING TIME OPTIMIZATION OF SURFACE FINISHING CNC MILLING PROCESS ON STEEL WORKS 2311 Kriswanto Kriswanto
Jurnal Pendidikan Teknik Mesin Vol 23, No 1 (2023): Jurnal Pendidikan Teknik Mesin
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v23i1.47391

Abstract

The rapid development of manufacturing technology is a challenge for manufacturing industry players,especially in CNC milling machining to be able to produce quality products and have an optimalmachining time speed so that high product quantities are achieved with low production costs.Therefore, small industry players now have problems with their CNC milling machines. The existingengine is relatively smaller and there are some limitations that make it a problem such as limited enginerpm and soon. All the existing problems, further research needs to be done to optimize all the needs ofthe industrial world today, especially regarding the time of the production process that needs to beoptimized. This research was conducted by varying all related parameters, starting from spindle speed,feed rate and depth of cut. In the implementation process, this research uses the Taguchi OrthogonalArray method to minimize experimental tests so that it is more time and cost efficient. The resultsobtained in this study are feed rate is the most influential parameter on machining time, followed byspindle speed and the third significant parameter is depth of cut with the smallest contribution tomachining time. Then for the most optimal design, there is the 3rd parameter design which has the mostoptimal time, which is 55 seconds
EFEKTIVITAS POWERPOINT MORPH TRANSITION TERHADAP HASIL BELAJAR SISWA SMK PADA MATA PELAJARAN KONSTRUKSI GEOMETRI Riki Febrianto; Septian Eko Cahyanto; Kriswanto Kriswanto
ACADEMIA: Jurnal Inovasi Riset Akademik Vol. 6 No. 3 (2026)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/academia.v6i3.11499

Abstract

This study aims to analyze the effectiveness of learning media based on the Morph Transition feature in Microsoft PowerPoint on students’ learning outcomes in the Geometric Construction subject at SMKN 1 Semarang. The development of the learning media was carried out by referring to the principles of the Cognitive Theory of Multimedia Learning (CTML). Before implementation, both the learning media and the research instruments were validated by six validators and obtained an average feasibility score of 86.1%. This study employed a quasi-experimental design using a pretest-posttest control group approach involving 62 students, consisting of 32 students in the control class and 30 students in the experimental class. The results showed that the average posttest score of the experimental class reached 92.29, which was higher than that of the control class with an average score of 85.65. The Independent Sample T-Test results also indicated significant differences in posttest scores (t = −2.406; sig. = 0.019) and N-Gain scores (t = −3.703; sig. = 0.000). In addition, Cohen’s d effect size values of 1.367 for the posttest and 1.710 for the N-Gain demonstrated that the learning media had a strong practical effect on improving students’ learning outcomes. Nevertheless, research on the use of the Morph Transition feature in Geometric Construction learning in mechanical engineering vocational schools remains relatively limited. Therefore, the findings of this study reinforce the importance of developing similar learning media, particularly for procedural subjects in vocational high school environments. ABSTRAK Penelitian ini bertujuan untuk menganalisis efektivitas media pembelajaran berbasis Morph Transition pada Microsoft PowerPoint terhadap hasil belajar siswa pada mata pelajaran Konstruksi Geometri di SMKN 1 Semarang. Pengembangan media dilakukan dengan mengacu pada prinsip Cognitive Theory of Multimedia Learning (CTML). Sebelum digunakan, media pembelajaran dan instrumen penelitian telah divalidasi oleh enam validator dan memperoleh rata-rata tingkat kelayakan sebesar 86,1%. Penelitian ini menggunakan desain quasi-experimental tipe pretest-posttest control group dengan melibatkan 62 siswa yang terdiri atas 32 siswa kelas kontrol dan 30 siswa kelas eksperimen. Hasil penelitian menunjukkan bahwa rata-rata nilai posttest kelas eksperimen mencapai 92,29, lebih tinggi dibandingkan dengan kelas kontrol yang memperoleh rata-rata 85,65. Hasil Independent Sample T-Test juga menunjukkan adanya perbedaan yang signifikan pada nilai posttest (t = −2,406; sig. = 0,019) serta N-Gain Score (t = −3,703; sig. = 0,000). Selain itu, nilai effect size Cohen’s d sebesar 1,367 pada posttest dan 1,710 pada N-Gain menunjukkan bahwa media pembelajaran tersebut memiliki pengaruh praktis yang kuat terhadap peningkatan hasil belajar siswa. Meskipun demikian, penelitian mengenai penggunaan fitur Morph Transition dalam pembelajaran Konstruksi Geometri pada SMK Teknik Mesin masih tergolong terbatas. Oleh karena itu, temuan penelitian ini memperkuat pentingnya pengembangan media pembelajaran serupa, khususnya untuk mata pelajaran prosedural di lingkungan SMK.
Pengembangan Media Flipbook Interaktif Berbasis QR Code untuk Meningkatkan Pemahaman Konsep Siswa pada Materi Alat Ukur Arya Bima Satrya Yudha; Septian Eko Cahyanto; Kriswanto Kriswanto
JGK (Jurnal Guru Kita) Vol. 10 No. 3: Juni 2026
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jgk.v10.i3.73941

Abstract

Penelitian ini bertujuan mengembangkan dan menguji efektivitas media flipbook interaktif berbasis QR Code pada materi alat ukur untuk meningkatkan pemahaman konsep siswa kelas X Teknik Pemesinan SMK IPT Karangpanas Semarang. Metode yang digunakan adalah Research and Development (R&D) model ADDIE dengan desain kuasi eksperimen pretest-posttest. Analisis data dilakukan menggunakan uji Shapiro-Wilk, uji Lavene, uji independent sample t-test, dan uji N-Gain. Hasil validasi menuunjukkan kelayakan media sebesar 82.5% (ahli media), 92.5% (ahli materi), dan 72.5% (ahli soal). Hasil uji t-test memperoleh nilai signifikasi 0,007(<0,05), yang membuktikan terdapat perbedaan pemahaman konsep yang signifikasi antara kelas eksperimen dan kelas kontrol. Hasil N-Gain kelas eksperimen mencapai rata-rata 56,24 (cukup efektif), lebih tinggi dibandingkan kelas kontrol sebesar 48,20 (kurang efektif). Media flipbook interaktif berbasis QR Code terbukti layak dan efektif meningkatkan pemahaman konsep siswa pada materi alat ukur.