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All Journal JOIV : International Journal on Informatics Visualization Teknomekanik E-Jurnal SPIRIT PRO PATRIA Makara Journal of Technology
Harmanto, Dani
Unknown Affiliation
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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Music Information Retrieval Based on Active Frequency Wibowo, Hardianto; Suharso, Wildan; Azhar, Yufis; Wicaksono, Galih Wasis; Minarno, Agus Eko; Harmanto, Dani
Makara Journal of Technology Vol. 25, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Music is the art of combining frequencies. A balance of frequencies gives rise to a harmonious tone. Several features of music can be analyzed, and they include sociocultural background, lyrics, mood, tempo, rhythm, harmony, melody, timbre, and instrumentation. In this study, we use the frequency of instrumentation as a feature for classification because each instrument has a frequency range. To test this frequency range, we use five music genres and one music playing skill. The five genres are dangdut, electronic dance music (EDM), metal, pop/rock, and reggae. The music playing skill is acoustic. Active frequencies are tested using the k-nearest neighbor method, and the results serve as basis of the accuracy of music classification. The classification accuracy for EDM, metal, and acoustic is over 70%, whereas that for dangdut, pop/rock, and reggae is less than 60%. In sum, the accuracy of music classification is influenced by the similarities in the music instruments used and the tempo.
The Implementation and Empirical Analysis of Android Learning Application toward Performance among Students Electronics Engineering Education Hidayat, Hendra; Harmanto, Dani; Orji, Chibueze Tobias; Anwar, Muhammad
JOIV : International Journal on Informatics Visualization Vol 8, No 3 (2024)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/joiv.8.3.2235

Abstract

The integration of technology into the realm of education is experiencing exponential growth, and an ever-evolving selection of media formats is being created to facilitate teaching and learning in a more effective manner. The objective of this research endeavor is to ascertain the degree to which the implementation of learning applications influences the academic achievement of students enrolled in electrical engineering-related programs. To accomplish this objective, learning methodologies and self-directed learning must be implemented as variables that impact students' academic performance. To facilitate this inquiry, a total of 339 representative samples of participants were collected. The collected data were subjected to analysis using the SmartPLS 4.0 software and the Structural Equation Model (SEM) with partial least square (PLS) correction. Following a thorough analysis, it was determined that the data provided an accurate representation of the population. The findings of this study have practical implications-students who engage in self-directed learning and implement effective learning strategies will see a substantial improvement in their overall learning outcomes. Students desire easy access to a variety of educational resources and materials, according to the findings. This aspiration motivates the proliferation of mobile media devices. To facilitate students' access to a diverse range of learning strategies, instructors possess the ability to provide accommodation. These applications benefit students by streamlining the process of obtaining access to learning-supporting materials and resources
Evaluation and characterization of charcoal briquettes using damar binder for sustainable energy Nurdin, Hendri; Waskito, Waskito; Harmanto, Dani; Purwantono, Purwantono; Kurniawan, Andre; Yuvenda, Dori; Anaperta, Yoszi Mingsih
Teknomekanik Vol. 8 No. 1 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i1.33672

Abstract

Palm kernel shells have great potential as biomass and renewable energy sources. Its utilization has not been maximized which is only directly burned which causes air pollution. The accumulation of solid waste in the crude palm oil processing industry negatively impacts the environment. The research aims to determine the characteristics and quality of charcoal briquettes with palm kernel shell carbonization. The main findings of this study are the calorific value, water content, volatile matter, ash content, and fixed carbon in palm kernel shell charcoal briquettes with damar binder. The experimental research method was carried out by carbonizing the raw materials of palm kernel shell briquettes, applying various concentrations of damar binder mixtures. The technical parameters of briquette making were 10 MPa pressure, 60 mesh size, and different carbonization temperatures by furnace. The calorific and proximate were empirically measured by using a bomb calorimeter. This research produced palm kernel shell charcoal briquettes with a calorific value of 30.72 MJ/kg at a carbonization temperature of 500oC and concentration of 85%:15%, a moisture content of 5.18%, volatile matter of 32.72%, ash content of 2.81%, and fixed carbon of 57.90%. Palm kernel shell charcoal briquetting technology is potentially a recommended alternative solid fuel. Consequently, developing renewable energy that is environmentally friendly leads to achieve sustainable energy security. By utilizing waste, the negative impacts on the environment can be overcome and energy needs are also resolved.
EKSPERIMEN ECOFRIENDLY PAVING PLASTIK HDPE Mudjanarko, Sri Wiwoho; Bin Arshad, Mohd Fadzil; Harmanto, Dani; Nurmianto, Eko; Artaya, I Putu; Rasidi, Nawir; Safarizki, Hendramawat Aski; Mayestino, Alexander Machicky; Mulyadi, Irwan; Bahaswan, Rizal; Ningsih, Hardian; Wiwoho, Firdaus Pratama; Achmad, Imron Ramdhani; Maruli, Sahat; Tjahjono, Prijo
E-Jurnal SPIRIT PRO PATRIA Vol 9 No 1: Maret 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat / Narotama University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29138/spirit.v9i1.2217

Abstract

Sampah merupakan sumber masalah dalam kehidupan kita sehari-hari baik di daerah perkotaan maupun pinggiran perkotaan. Keterbatasan pembuangan sampah menimbulkan bencana sendiri apabila tidak bisa dilakukan pengelolaan yang baik atau didaur ulang untuk kebutuhan kehidupan lainnya. Proses daur ulang bisa menjadi peluang bisnis masyarakat sekitar maupun Industri skala UMKM. Salah satu bagian sampah yang bisa didaur ulang adalah plastik. Plastik merupakan material yang sulit diuraikan didalam tanah. Di beberapa kota besa Di beberapa kota besar, permasalahan pemilahan plastik dilakukan oleh Bank Sampah yang dibentuk sesuai tingkat kesadaran masyarakatnya seperti Bank Sampah Bhakti Pertiwi di bawah naungan Bumdes Tamansera Tambaksawah di Kota Sidoarjo.. Permasalahan ini akan menimbulkan bencana bagi umat manusia. Tujuan penelitian ini ini untuk memproses limbah plastik menjadi produk paving yang ramah lingkungan dengan mutu yang bisa menerima beban ringan seperti sebagai jalan setapak. Metodologi yang dilakukan dalam pembuatan paving plastik adalah mengumpulkan tutup botol plastik yang termasuk kategori plastik HDPE. Langkah selanjutnya dilakukan pembakaran menggunakan media kompor berenergi gas LPG. Setelah plastik mendidih dan mencair, plastik hasil pembakaran dimasukkan ke media cetak paving dan setelah cetakan penuh dilakukan perendaman di air untuk melepaskan paving plastik dari cetakan. Dari hasil pengujian material ini dihasilkan mutu tekan yang baik sehingga bisa dijadikan salah satu cara menyelesaikan permasalahan sampah plastik dan produk ekonomis yang dihasilkan bisa menjadi bagian bisnis umkm masyarakat sekitarnya.
Co-Authors Achmad, Imron Ramdhani Agus Eko Minarno Anaperta, Yoszi Mingsih Andre Kurniawan Bin Arshad, Mohd Fadzil Dori Yuvenda Eko Nurmianto Firdaus Pratama Wiwoho, Firdaus Pratama Hardian Ningsih, Hardian Hardianto Wibowo Hendra Hidayat Hendramawat Aski Safarizki I Putu Artaya Maruli, Sahat Mayestino, Alexander Machicky Muhammad Anwar Mulyadi, Irwan Nawir Rasidi Nurdin Hendri Orji, Chibueze Tobias Purwantono, Purwantono Rizal Bahaswan Sri Wiwoho Mudjanarko, Sri Wiwoho Tjahjono, Prijo Waskito Waskito, Waskito Wicaksono, Galih Wasis Wildan Suharso Yufis Azhar