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All Journal JURNAL PENELITIAN ILMU PENDIDIKAN Candra Sangkala Jurnal Kedokteran Brawijaya Trikonomika: Jurnal Ekonomi Agrointek Jurnal Eksplora Informatika JITK (Jurnal Ilmu Pengetahuan dan Komputer) Jurnal Komtika (Komputasi dan Informatika) METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi JITTER (Jurnal Ilmiah Teknologi Informasi Terapan) Jurnal Teknologi dan Informasi JURNAL MANAJEMEN BISNIS Infotronik : Jurnal Teknologi Informasi dan Elektronika Journal of Information System, Applied, Management, Accounting and Research @is The Best [Accounting Information System & Information Technology Business Enterprise] Jutisi: Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Dinasti International Journal of Education Management and Social Science Jurnal Informatika dan Rekayasa Perangkat Lunak Jurnal Penegakan Hukum dan Keadilan AL-ARBAH: Journal of Islamic Finance and Banking JINAV: Journal of Information and Visualization International Journal of Engineering, Science and Information Technology Djtechno: Jurnal Teknologi Informasi Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Jurnal Ekonomi International Journal of Research and Applied Technology (INJURATECH) Jawa Dwipa Jurnal Algoritma Jurnal Dimamu Journal of Peasants' Rights Jurnal Komputer Bisnis Jurnal Teknologi Informasi Magna: Journal of Aconomics, Management, and Business Jurnal Akuntansi, Manajemen dan Perbankan Syariah Jurnal Pendidikan Kristen dan Ilmu Teologi Marturia Pangkaja: Jurnal Agama Hindu Jurnal Agro Fabrica Coreid Journal SmartComp Jurnal Teknologi Informasi Indonesia INTERNAL (Information System Journal) JEPEmas: Jurnal Pengabdian Masyarakat (Bidang Ekonomi) Amerta Berkala Arkeologi As-sunniyyah JuTISI (Jurnal Teknik Informatika dan Sistem Informasi) Jurnal Komtika (Komputasi dan Informatika)
Heri Purwanto
Universitas Sangga Buana, Bandung City, West Java 40124, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Transportation Other

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ANALISIS TERMODINAMIKA DAN KINETIKA PADA PROSES TRANSESTERIFIKASI MINYAK SAWIT MENJADI BIODIESEL DENGAN METODE SYSTEMATIC LITERATURE REVIEW Irham, Wardatul Husna; Purwanto, Heri; Adhyaksa, Bagus; Putra, Raihant Syah; Syahda, Arsyifa Nirmala; Ambarita, Tony Gunawan
Jurnal Agro Fabrica Vol. 7 No. 2 (2025): Desember 2025
Publisher : Institut Teknologi Sawit Indonesia (ITSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47199/jaf.v7i2.349

Abstract

ABSTRAK Biodiesel merupakan bahan bakar ramah lingkungan yang dihasilkan melalui proses transesterifikasi antara minyaknabati dan alkohol dengan bantuan katalis.minyak kelapa sawit Adalah bahan baku utama yang potensial karenamemiliki ketersediaan yang melimpah. Pembahasan ini bertujuan untuk menganaisis aspek termodinamika dankinetika pada proses transesterifikasi minyak kelapa sawit menjadi biodiesel.berdasarkan Jurnal yang telah kami baca.Analisis ini difokuskan pada jenis katalis,suhu reaksi,jenis alcohol, dan nilai energi yang mempengaruhi produtivitasbiodiesel.Hasil telah menunjukan bahwa Sebagian besar analisis ini menggunakan model kinetika Arrhenius denganpendekatan kinetika orde satu terhadap trigliserida.niali yang terkandung dalam energi aktivasi (Eₐ) sekitar 10–60kJ/mol, dengan katalis basa homogen (NaOH dan KOH) menghasilkan laju reaksi lebih cepat dan Eₐ lebih rendahdibandingkan katalis heterogen berbasis CaO atau abu sawit.secara termodinamika dan reaksi transestrifikasi bersifatendotermik dan reversible, dikarenakan peningkatan suhu dan rasio alcohol mempercepat proses pembentukanbiodiesel.Metanol ini terbukti lebih efisien dibandingkan dengan etanol, karena metanol menghasilkn konversi tinggilebih tinggi dan waktu reaksi lebih singkat dibandingkan dengan etanol. Pemahaman yang luas terhadap hubunganantara termodinamika dan kinetika yang menjadi dasar penting utuk merancang proses produksi biodiesel yang lebihefisien, ekonomis dan berkelanjutan. ABSTRAK Biodiesel is an environmentally friendly fuel produced through a transesterification process between vegetable oiland alcohol with the aid of a catalyst. Palm oil is a potential primary raw material due to its widespread availability.This discussion aims to analyze the thermodynamic and kinetic aspects of the transesterification process of palm oilinto biodiesel based on twenty journals that we have read. This analysis focuses on the type of catalyst, reactiontemperature, type of alcohol, and energy value that affect biodiesel productivity. The results show that most of theseanalyses employ the Arrhenius kinetic model, using a first-order kinetic approach for triglycerides. The activationenergy (Eₐ) value is around 10–60 kJ/mol, with homogeneous base catalysts (NaOH and KOH) producing fasterreaction rates and lower Eₐ compared to CaO-based heterogeneous catalysts or palm ash. Thermodynamically, thetransesterification reaction is endothermic and reversible, as increased temperature and alcohol ratio accelerate thebiodiesel formation process. Methanol has proven to be more efficient than ethanol, as it produces higher conversionrates and shorter reaction times compared to ethanol. A broad understanding of the relationship betweenthermodynamics and kinetics is an important basis for designing a more economically efficient and sustainablebiodiesel production process.
From Mine to Metropolis: A Systematic Review of Green Mining Innovations for Sustainable Urban Logistics Darwisman, Samuel; Purwanto, Heri; Nisa, Haerun; Siahaan, Jusuf Roni; Dermawan, Azizi
Dinasti International Journal of Education Management and Social Science Vol. 7 No. 2 (2025): Dinasti International Journal of Education Management And Social Science (Decem
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijemss.v7i2.6033

Abstract

Urban logistics contributes significantly to environmental degradation, challenging the achievement of Sustainable Development Goals. Concurrently, the green mining industry has developed robust technological innovations with potential applicability in urban contexts, yet this cross-sectoral knowledge transfer remains underexplored. This study aims to bridge this gap through a systematic literature review of 30 peer-reviewed articles to identify transferable technologies and the determinants influencing their implementation. The methodology followed the PRISMA guidelines, analyzing literature from Scopus and Web of Science and assessing their quality using the CASP checklist. Results reveal three key transferable domains: (1) fleet electrification, (2) autonomous systems, and (3) circular economy models. Key enablers include policy incentives and long-term economic benefits, while high initial capital expenditure and regulatory uncertainty are primary barriers. The primary contribution of this research is a novel conceptual framework that provides an actionable roadmap for policymakers to accelerate the decarbonization of urban freight by leveraging proven industrial innovations. This study offers significant practical implications for enhancing urban sustainability.
SUPPORT VECTOR MACHINE TO CLASSIFY SENTIMENT REVIEWS ON GOOGLE PLAY STORE Nursikuwagus, Agus; Suherman; Purwanto, Heri; Hartono, Tono
JITK (Jurnal Ilmu Pengetahuan dan Teknologi Komputer) Vol. 11 No. 3 (2026): JITK Issue February 2026
Publisher : LPPM Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33480/jitk.v11i3.7282

Abstract

This research addresses the "rating-content discrepancy" on the Google Play Store, where numerical star ratings often conflict with the actual sentiment of textual reviews. Utilizing the CRISP-DM   framework, the study evaluates the effectiveness of machine learning in resolving these inconsistencies by classifying Instagram user reviews into positive and negative categories. Two primary algorithms were compared using a dataset of 600 reviews. The Support Vector Machine (SVM) model demonstrated high efficacy with an accuracy of 0.84. In contrast, the K-Nearest Neighbors (KNN) model performed poorly, achieving an accuracy of only 0.48. This significant performance gap highlights SVM's superior ability to handle high-dimensional text data through optimal hyperplane separation. The research further integrated the Streamlit library to create an interactive web interface for real-time sentiment prediction and result visualization. Ultimately, this study confirms that a structured CRISP-DM approach combined with SVM provides a robust solution for automated opinion mining, offering a reliable methodology for future data science applications in social media analysis
Alat Deteksi Kebocoran Gas Menggunakan Sensor MQ-2 Berbasis Arduino Uno Purwanto, Heri; Putra, Alifudin Nuryansyah; Shiddieq, Diqy Fakhrun; Wiharko, Teguh
Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Vol. 2 No. 2 (2021): December
Publisher : Faculty of Vocational Studies - Research Center, DRPM ITS

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

Abstract

Penggunaan LPG tertinggi di Indonesia saat ini digunakan oleh rumah tangga dengan presentase yang terus meningkat setiap tahunnya karena LPG merupakan bahan bakar yang mudah ditemukan dan terjangkau di kalangan rumah tangga khususnya untuk ekonomi menengah kebawah. Namun dibalik tingginya penggunaan LPG, masih banyak masyarakat yang menghiraukan risiko kebocoran gas. Penelitian ini bertujuan merancang prototype untuk mendeteksi adanya kebocoran gas, asap, atau api di dapur dengan memanfaatkan Exhaust Fan untuk membuang gas atau asap yang terdeteksi. Metodologi yang digunakan pada penelitian ini adalah ADDIE yaitu model pengembangan efektif yang menuntut kesesuaian antara pendekatan yang digunakan dengan produk yang akan dihasilkan. Alat pendeteksi dirancang dan direalisasikan menggunakan sistem kendali Mikrokontroller Arduino Uno dengan sensor MQ-2. Sensor MQ-2 dan sensor Flame Detector mendeteksi adanya kebocoran gas, asap, atau api dan mengirimkan data kepada Arduino Uno agar Buzzer, Layar LCD, dan Exhaust Fan dapat menyala diikuti display status bahaya dan kadar gas disekitaran alat. Hasil uji coba menunjukkan bahwa sensor MQ-2 dapat mendeteksi gas dalam waktu 2.9 detik untuk kadar gas >300 ppm, asap dengan kadar >200 ppm terdeteksi dalam 2.25 detik, dan sensor flame detector dapat mendeteksi api dari jarak maksimal 30cm dalam waktu 0.61 detik.
APLIKASI SEVEN TOOLS QUALITY CONTROL DALAM PENGENDALIAN MUTU CRUDE PALM OIL (CPO) DI TANGKI TIMBUN PABRIK KELAPA SAWIT Purwanto, Heri; Mahyunis; Hartanti, Puspita Sri
Jurnal Agro Fabrica Vol. 7 No. 2 (2025): Desember 2025
Publisher : Institut Teknologi Sawit Indonesia (ITSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47199/jaf.v7i2.383

Abstract

Quality control of Crude Palm Oil (CPO) is essential to ensure compliance with quality standards. This study aims to control and analyze CPO quality parameters, namely Free Fatty Acid (FFA), moisture content, and dirt content, using the Seven Tools of Quality Control. The research was conducted at a palm oil mill in South Labuhanbatu Regency, North Sumatra, using laboratory quality data collected from October to December 2024. A descriptive quantitative method was applied by utilizing check sheets, Pareto diagrams, control charts, and fishbone diagrams within the Quality Control Circle (QCC) approach. The results showed that quality deviations occurred in 28 samples for FFA, 22 samples for dirt content, and 14 samples for moisture content. Pareto analysis indicated that FFA and dirt content were the main contributors to quality problems, accounting for 78.13% of total deviations. Control chart analysis revealed several periods of process instability, particularly in FFA values. The study concludes that the Seven Tools of Quality Control are effective in identifying dominant quality problems and supporting improvement efforts to enhance CPO quality.
Pengaruh Persepsi Harga, Service Quality, Customer Experience, dan Customer Trust Terhadap Loyalitas Pelanggan Produk Jasa Utami, Rafika Bakti; Kaukab, M. Elfan; Purwanto, Heri
Jurnal Akuntansi, Manajemen dan Perbankan Syariah Vol. 6 No. 1 (2026): Februari 2026
Publisher : UP2MF Fakultas Ekonomi dan Bisnis, Universitas Sains Al-Qur'an (UNSIQ) Jawa Tengah di Wonosobo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/k8852565

Abstract

Tujuan -   Penelitian ini bertujuan untuk menganalisis   pengaruh persepsi harga, service quality, customer experience, dan cuetstomer trust terhadap loyalitas pelanggan pada Bengkel Mobil Ham’z Motor Wonosobo. Metodologi - Penelitian ini menggunakan pendekatan kuantitatif. Populasi penelitian adalah pelanggan Bengkel Mobil Ham’z Motor Wonosobo. Teknik pengambilan sampel menggunakan non-probability sampling dengan rumus Lemeshow jumlah sampel sebanyak 96 responden. Analisis data dilakukan menggunakan regresi linier berganda dengan bantuan program SPSS 25. Hasil penelitian – menunjukkan bahwa persepsi harga berpengaruh signifikan terhadap loyalitas pelanggan (t = 2,528 ; p = 0,013), service quality berpengaruh signifikan terhadap loyalitas pelanggan (t = 4,191 ; p  = 0,000), customer experience signifikan terhadap loyalitas pelanggan (t = 4,047 ; p = 0,000) dan customer trust signifikan terhadap loyalitas pelanggan (t = 3,415 ; p = 0,001). Keterbatasan – hanya dilakukan pada satu objek penelitian sehingga hasilnya belum dapat digeneralisasikan secara luas, serta variabel yang diteliti masih terbatas pada empat faktor. Agenda penelitian yang akan datang -  diharapkan dapat menambahkan variabel lain seperti kepuasan pelanggan, citra merek, dan switching cost, serta memperluas objek penelitian pada bengkel otomotif lain atau sektor jasa yang berbeda agar hasil penelitian lebih komprehensif.
Co-Authors Abdurahman, Fairuz Rifqi Adhyaksa, Bagus Adini, Izmi Agus Nursikuwagus Agus Rahayu Agus Yudianto Ahadiyah, Latifatul Ahirotunisa, Suci Aini Mahabbati Akbar Al Ghifari Akbar, Muhamad Asif Maulana Al-Khoir, Habib Aldi Novriadi aldi, andi Alfirdaus, Muhammad Fidly Ali Ferhat Ambarita, Tony Gunawan Andres Permana Shidiq Andri Budi Santoso Andriansyah, Edi Anggi Algifary Salim Anggraeni, Octa Putri Antama, Febrizal Anugrah Rizki Samudra Anugrah Taufik Apriyanti, Siti Nur Arif Darmawan Arifin, Davit Aryanggara, Yanwar Azka, M. Gilang Maulana Bahtiar Efendi Bambang Pujiarto Bareta, Arief Bayu, Rahindra Beki Subaeki, Fatkhan Gunawan, Aldy Rialdy Atmadja, Beki Budi Prasetio Butar-Butar, Revaldo Cahyani, Herlina Dwi Chika Gustiana Widiarestuwati Coleta Palupi Titasari Dania, Afifah Farrah Darwisman, Samuel Deastuti, Sherly Dermawan, Azizi Devie Firmansyah, Devie Dewantoro, Bambang Diqy Fakhrun Shiddieq Dwi Anggraini, Nur Fitria Dyas Firmansyah Dzakiyun Naval Edy Winarno Fachrizal Fahmi Reza Ferdiansyah Farah Fadilah Alfarabi Fariel Rizky Megawan Fatah At Thariq Fauzi Ramdani Fernanda Rahmaeni Nur Taufik Fiqri Arya Nugraha Firman Maulana, Firman Giyanto Giyanto Gulo, Iwan Sah Putran Gunawan, Yanyan Gustian, Robby Hafitzah, Nur Hamdani, Deden Sofyan Hananto, Ananda Zagkia Hartanti, Puspita Sri Hidayah, Attinia Hinawati, Titik HUTASUHUT, MHD FUAD MAHRUZ WIRA'I Indiati Indiati, Indiati Iwan Adhicandra Jarjayus, Muhammad Kamaulid, Tabiya Rayna Karbito Karbito, Karbito Kaukab, M. Elfan Khaeroman, Khaeroman Khaerul Manaf Khusnul Hidayah Kraugusteeliana Kraugusteeliana Kusdayanti, Niken Kusumo Atmojo, Langgeng Lili Adi Wibowo Lini, Nahdia M. Trihudiyatmanto Ma'sum, Aziz Maharani, Hastin Mahyunis Maisa Azizah Asmara Malau, Febiola Angelia Manurung, Emy Fadillah Margiyono, Toto Maula, Muhammad Nafi' Maula, Nur Ishmatul Maulana Azka, Muhammad Gilang Maulana, Dimas Dwi Maulana, Yono Mayliani, Atika Mochamad Cory Sakti Triwangsa Mochamad Raffnie Prayogha Mochamad Salman Ramadhan Mohamad Gifahri Addiansyah Mohamad Rizky Muhammad Hafiz Mukhtar Hanafi Mulya, Adi Tri Mulyara, Budi Munawar, Asep Munthe, Mandala Putra Musfiroh, Mila Fursiana Salma Musfiroh Fursiana Salma Nabilla Labaika Thalia Margaret Nafitasari, Siti Dia Namudany, Rania Nanda Putri Yasyallah Nasution, Faiz Albar Nasution, Santa Yusuf Nasyikin, Muhammad Neti Budiwati Nisa, Haerun Nita Yuanita Noor Hikmah, Noor Nugraha, Rikky Wisnu Nurhayati, Eni Candra Nurhidayati, Titin Nurul Fauziah NURUL HIDAYAH Nuruzzaman, Muhammad Efrizal Zahid Oktavia, Annisa Pada Mulia Raja Pangestuti, Anni Enggal Perdana, Rangga Satria Pratama, Ghandy Priadi, Ery Pulungan, Qias Nabirah Purbayanto, Bayu Purnama, Satria Sa'ban Purnama, Yayan Yudha Purwandari Purwandari Putra, Alifudin Nuryansyah Putra, Pramono Dimas Dwi Putra, Raihant Syah Putranto, Agus Putri, Armelia Army Rafi Martua Syahputra Rahimah Rajeg, Kadek Dedy Prawirajaya Rian Hidayat Ridwan, Taupik Rizkiyadi, Dicky Roisah, Roisah Rojab, Aji Ahadun Rudy Sofian Sabila, Asfyani Maiza Sabrina, Hana Saepudin, Didin Sahlan, H. Moh. Santa Yusuf Nasution SAUKANI, MHD AHYAR Setiawan , Rian SETIAWAN, Ahmad Sherly Deastuti Shiddieq, Diqy Fakhrun Siahaan, Jusuf Roni Silvia Julianti Sinaga, Shiva Anggreini Siregar , Ajis Paroji Siti Aisyah Siti Nur Aisah Situmeang, Pirmana Sri Achadi Nugraheni Sri Wahyuna Saragih Suherman Sukardi Sukardi Sulistyaningsih, Sulistyaningsih - Suprapti, Fitri Susanto Susanto Syahda, Arsyifa Nirmala Taufiq Akbar, Imam Taufiq Dwi Cahyono Taupik Ridwan Tin Suharmini Tirtasari, Coleta Palupi Tito Ramadhan, Muhammad Tono Hartono, Tono Topan Trianto Utami, Farida Riza Utami, Rafika Bakti Vanessa Gaffar Wahyu Abdilah WAHYU NURJAYA WK Wahyudin Wahyudin WARDATUL HUSNA IRHAM Wiharko, Teguh Wiharko, Teguh Winarni, Endra Wiwik Handayani Yanwar Aryanggara Yasfiro Blesahangga Yesaya Pranadinata Yogi Triono Yolanda Ashary Zakwan Zuhdy, Mukhtar