Rizqi Naryanto

Dr. Rizqi Naryanto

Universitas Negeri Semarang
orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 April 2020 in Applied Sciences
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Journal Article
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RNRizqi Naryanto
Rizqi Naryanto
HEhiroshi enomoto
hiroshi enomoto
ACAnh Vo Cong
Anh Vo Cong
KFKazuki Fukadu
Kazuki Fukadu
ZZZheng Zong
Zheng Zong
RNReiji Noda
Reiji Noda
This study examined the tar characteristic of wood pellet using a downdraft gasifier system. The wood pellet was used as a feedstock with a variation of moisture content between 2 to 6 wt. %. Tar sample was taken using the JP 2009-40885 method. Gas chromatography mass spectrometry and gravimetric analysis were used to identify and to analyze the tar sample, respectively. The results show that an increase in moisture content slightly decreased the total concentration of tar formation on the nine tar compounds of the biomass. Additionally, the lowest moisture content produced the highest amount of light tar on tar classification. The amount of light tar indicates the ease of ignition in the gasifier. Therefore, this condition will minimize the failure-of-equipment problem because of no clogs in the gasifier equipment. The lowest moisture content had the lowest tar density, and this minimized the deposit of tar in the gasifier. Therefore, the lowest moisture content had low tar production in the biomass gasification process using wood pellets.

3 April 2023 in Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
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ABAldias Bahatmaka
Aldias Bahatmaka
MWMuhammad Yusuf Wibowo
Muhammad Yusuf Wibowo
AGAndi Abdullah Ghyfery
Andi Abdullah Ghyfery
MHMuhammad Harits
Muhammad Harits
SASamsudin Anis
Samsudin Anis
KJKim Dong Joon
Kim Dong Joon
Indonesia is a maritime country with two-thirds of its territory is the ocean. Indonesia has a diversity of marine resources with a total fish production continuing each year to reach 8.02 million tons. The traditional fishing vessel is one of transportation and livelihood support in Indonesia and the vessel was made based on the knowledge from generation to generation. Thus, the investigation of the fishing vessels must be conducted to measure the resistance profile and wave pattern. This analysis is conducted to consider the mono-hull fishing vessel design. The use of a numerical approach is rapid to predict the performance of ship design. The resistance analysis is investigated using Savitsky’s mathematical model and Holtrop’s regression method. Comparing studies is the main focus to describe the effectiveness of the methodology. The research will present the three variations of the hull for the mono-hull design. By comparing both methods, the best design makes the methods well enough to be used for resistance analysis, especially in the fishing vessel design.

23 March 2023 in Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
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KKKriswanto Kriswanto
Kriswanto Kriswanto
MSMuhammad Adnan Bayu Setiawan
Muhammad Adnan Bayu Setiawan
DADony Al-Janan
Dony Al-Janan
RNRizqi Naryanto
Rizqi Naryanto
ARAhmad Roziqin
Ahmad Roziqin
JAJamari
Jamari
The rotor is one of the vital components of a wind turbine. In the design of the rotor, the expected result is the most optimal power. This purpose study is to optimization of the Horizontal Axis Wind Turbine power of various parameters such as airfoil, angle of attack, and pitch angle. Airfoils (NACA 4412-2412 T.E. mod, NACA 2412-4412 T.E. mod, NACA 4412-2412 L.E. mod, NACA 2412-4412 L.E. mod), angle of attack (0, 2, 4, 6), and pitch angle (0, 1, 2, 3) are the parameter variations used. The simulation method uses BEM (Blade Element Momentum), and the Taguchi for optimization is based on the L16 orthogonal array matrix. The ANOVA has to determine the contribution of each parameter to the HAWT power generated. Simulation and optimization results show that the most optimal parameter was a NACA airfoil 4412-2412 L.E mod, at 0˚ angle of attack and 0˚ pitch angle, with the resulting power reaching 1015780 Watt. The ANOVA analysis shows the airfoil parameter has the greatest contribution to the rotor power of the HAWT compared to the angle of attack and pitch angle.

4 January 2025 in Jurnal Pendidikan dan Teknologi Indonesia
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MYMuhammad Dwi Yulianto
Muhammad Dwi Yulianto
RIRanu Iskandar
Ranu Iskandar
RNRizqi Naryanto
Rizqi Naryanto
Kurangnya evaluasi komprehensif pengaruh media pembelajaran terhadap hasil belajar siswa SMK otomotif memotivasi penelitian ini. Tujuan dari penelitian ini untuk menelusuri tentang sejauh mana pengaruh media pembelajaran terhadap hasil belajar siswa SMK otomotif dan mendeteksi tingkat variasi antar studi dapat dianalisis dengan meta analisis. Data dikumpulkan dari Google Scholar yang dicari bulan Oktober hingga November 2024 dengan memasukkan kata kunci yang telah ditentukan. Setelah itu dilakukan proses tahapan PRISMA (Preffered Reporing Item for Systematic Review and Meta Analysis). Sesuai kriteria inklusi, 31 manuskrip yang memenuhi kelayakan untuk dianalisis. Alat bantu analisis data tersebut dilakukan dengan menggunakan software JASP versi 0.19.0.0. Hasil penelitian ditemukan effect size menggunakan model Random Effect secara keseluruhan dari penerapan media pembelajaran terhadap hasil belajar siswa adalah 0.971. Temuan ini mengindikasikan bahwa penerapan media pembelajaran terdapat pengaruh signifikan terhadap hasil belajar siswa. Analisis terhadap tiga variabel moderator digunakan untuk mempertimbangkan tingkat variasi studi. Variabel Jenis media pembelajaran Macromedia Flash [1,267, 95%CI (0.415, 2.118)], Animasi [1,144, 95%CI (0.144, 2.144)] dan Video [0,714, 95%CI (0.244, 1.185)] menunjukkan pengaruh signifikan. Variabel wilayah Sumatera [1.928, 95%CI (0.455, 3.401)], Sulawesi [1.053, 95%CI (0.202, 1.905)], dan Jawa [0.885, 95%CI (0.333, 1.436)] menunjukkan pengaruh signifikan, sedangkan Bali [0.649, 95%CI (-0.258, 1.555)] dan Kalimantan [0.149, 95%CI (-0.291, 0.589)] tidak signifikan. Variabel publikasi jurnal [0.961, 95%CI (0.512, 1.409)] dan repositori skripsi [1.043, 95%CI (0.070, 2.016)] menunjukkan pengaruh signifikan. Macromedia flash merupakan media pembelajaran paling mempegaruhi hasil belajar siswa SMK disusul oleh animasi dan video. Temuan ini menandakan bahwa media pembelajaran lebih efektif di terapkan di Sumatera, Sulawesi, dan Jawa dengan penelitian yang bersumber dari jurnal maupun skripsi memiliki pengaruh signifikan. Penelitian ini penting untuk memperkuat pengambilan keputusan berbasis data dalam penerapan media pembelajaran yang efektif dalam meningkatkan hasil belajar siswa otomotif.

4 January 2025 in Jurnal Pendidikan dan Teknologi Indonesia
Verified
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IFIgnas Fuatzin
Ignas Fuatzin
RIRanu Iskandar
Ranu Iskandar
RNRizqi Naryanto
Rizqi Naryanto
Tujuan dari penelitian ini adalah untuk mengevaluasi bagaimana berbagai pendekatan pembelajaran mempengaruhi hasil belajar siswa dalam pendidikan otomotif. Penelitian ini merupakan meta analisis. Data dikumpul dari google scholar dan semantic scholar yang dicari bulan Oktober 2024. Kata kunci menggunakan Bahasa Indonesia dengan kombinasi metode pembelajaran Demonstrasi, Kooperatif, Problem-based Learning, Team Quiz, Group Resume, Inkuiri dan Active Knowledge Sharing dengan hasil belajar siswa SMK Otomotif.. Data yang dimasukkan adalah g sebagai Effect Size dan SEg sebagai Standar Error untuk menghasilkan forest plot yang didalamnya terdapat interval nilai untuk setiap penelitian dan kesimpulan. Perhitungan heterogenitas dan bias publikasi juga diidentifikasi hasil analisisnya. Ada 15 manuskrip yang digunakan untuk dianalisis. Hasil penelitian ini menunjukkan bahwa dengan effect size sebesar 1,601, terdapat pengaruh yang signifikan antara metode pembelajaran dan hasil belajar. Hasil belajar siswa telah terbukti meningkat secara signifikan dengan metode demonstrasi, kooperatif, problem-based learning, inkuiri, group resume, dan active knowledge sharing. Selain itu, penelitian ini menemukan bahwa variabel wilayah dan jenis publikasi tidak berkontribusi secara signifikan terhadap perbedaan hasil belajar. Pada hasil analisis menggunakan model Random Effect menunjukkan bahwa wilayah Jawa = 2.403, 95%CI[-2632, 7.437], Sulawesi=0.254, 95%CI[-5.687,6.195] dan wilayah Sumatera = -1.876, 95%CI [-7.306, 3.554] tidak signifikan karena semua nilai p > 0.05. Hasil analisis heterogenitas menunjukkan tingkat variasi yang signifikan. Hasil analisis menggunakan model random effect menunjukkan bahwa beberapa metode seperti Demonstrasi = -5.361, 95%CI[-8.516, -2.205], Kooperatif = -5.350, 95%CI[-8.793, -1.907], Problem-Based Learning = -5.450, 95%CI[-8.896, -2.004], Team Quiz = 0.188, 95%CI[-4.727, 5.103], Group Resume = -5.140, 95%CI[-9.973, -0.307], Active Knowledge Sharing = -5.716, 95%CI[-10.545, -0.887], Inkuiri = -6.911, 95%CI[-11.538, -2.285]. Urutan metode pembelajaran yang signifikan mempengaruhi hasil belajar, yaitu demonstrasi, kooperatif, problem-based learning, group resume, inkuiri dan active knowledge sharing, sedangkan metode team quiz yang tidak signifikan karena nilai p > 0.05.

19 April 2022 in Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
Verified
Journal Article
Open access
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KKKriswanto Kriswanto
Kriswanto Kriswanto
FRFajar Romadlon
Fajar Romadlon
DADony Al-Janan
Dony Al-Janan
WAWidya Aryadi
Widya Aryadi
RNRizqi Naryanto
Rizqi Naryanto
JAJamari
Jamari
This paper presents rotor power optimization of the Horizontal Axis Wind Turbine of various parameters such as airfoil, angle of attack, and wind speed. Simulation of HAWT rotor power uses Blade Element Momentum (BEM). Furthermore, optimization using the Taguchi method with L16(43) orthogonal array. The parameters used in this study were: airfoil NACA (National Advisory Committee for Aeronautics) 4412, NACA 2412, NACA 4412-NACA 2412, NACA 4412mod-NACA 2412mod; angle of attack 3˚, 4˚, 5˚, 6˚; and wind speed of 5, 6, 7, 8 (m/s). The simulation uses the general parameter at 1 MW HAWT. Several types of NACA airfoil, angle of attack, and wind speed were simulated, then optimized to obtain optimal parameters for the HAWT output power. The results of this study found the most optimal rotor power, namely the condition of the NACA 4412mod-NACA 2412mod airfoil, 3˚ angle of attack, and 8m/s wind speed. Wind speed is the most significant influence factor based on ANOVA analysis ranked 1st based on S/N ratio analysis, 2nd rank is an airfoil, and 3rd rank is the angle of attack. The higher the wind speed, the greater the rotor power generated.