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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) International Journal of Reconfigurable and Embedded Systems (IJRES) International Journal of Applied Power Engineering (IJAPE) The Journal of Experimental Life Sciences (JELS) Jurnal Teknik Elektro TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Informatics (IJEEI) JURNAL NASIONAL TEKNIK ELEKTRO Proceeding of the Electrical Engineering Computer Science and Informatics Arty: Jurnal Seni Rupa Jurnal SOLMA JURNAL MUQODDIMAH : Jurnal Ilmu Sosial, Politik dan Hummaniora Indonesian Journal of Electrical Engineering and Computer Science International Journal of Electrical, Energy and Power System Engineering (IJEEPSE) Jurnal Kepastian Hukum dan Keadilan Andalasian International Journal of Applied Science, Engineering, and Technology Akuntansi'45 COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Andalas Journal of Electrical and Electronic Engineering Technology Jurnal Andalas: Rekayasa dan Penerapan Teknologi Jurnal Rekayasa elektrika JAMBIS : Jurnal Administrasi Bisnis Eduarts: Jurnal Pendidikan Seni
Syafii .
Electrical Engineering, Dept., Engineering Faculty, Universitas Andalas
Aerospace Engineering Arts Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Neuroscience Social Sciences Other

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Integrated and Sequential Enzyme-Assisted Extraction of Fucoidan and Alginate from Sargassum echinocarpum Sugiono, Sugiono; Hidayat, Mohammad Taufiq; Wahyuni, Endang Tri; Syafii, Syafii; Fikriyatullatifah, Anisa; Mumtazah, Lutfia Anis
The Journal of Experimental Life Science Vol. 15 No. 2 (2025)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jels.2025.015.02.05

Abstract

The sequential extraction biorefinery process can use brown algae as its feedstock, offering a sustainable approach to maximizing the utilization of marine biomass for high-value bioactive compounds. This method enables the recovery of multiple bioactive components from a single raw material, increasing process efficiency and reducing waste. Fucoidan and alginate, two valuable polysaccharides in brown algae, have attracted significant attention due to their diverse applications in the pharmaceutical, nutraceutical, and food industries. This research aims to develop an enzyme-assisted extraction (EAE) process that maximizes the fucoidan yield of Sargassum echinocharpum in the integrated alginate and fucoidan extraction biorefinery process. The effect of the parameter process, including temperature, time, and solvent-to-algae ratio, was evaluated to maximize fucoidan and alginate yield and determine the correct equation model in the first order of the experiment. The study showed that temperature, time, and the ratio of solvents all had a real effect on how quickly the fucoidan and alginate yields increased and then decreased after reaching their highest point. The temperature of 50°C, time of 24 hours, and the solvent-to-algae ratio of 30:1 (v/w) resulted in the highest fucoidan yield of 4.25% and alginate yield of 35.3%,  along with an intrinsic viscosity of 78.91 mL.g-1, molecular weight of 73.58 kDa, and an M/G ratio of 0.35.  Statistical analysis revealed a quadratic relationship, suggesting the presence of an optimal extraction condition. These findings highlight the potential of enzyme-assisted biorefinery techniques for improving fucoidan and alginate extraction. This extraction process demonstrates significant potential for industrial-scale application in the food, pharmaceutical, and nutraceutical industries due to its efficiency and sustainability.  
Overview of Electrical Energy Planning in West Sumatera Aditio Pribadi, Rizki; Syafii, Syafii
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 1 (2021): July 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i1.7

Abstract

Electrical energy is one of the most important components in the development of an area. The development of sustainable development accompanied by rapid technological advances and an increase in living standards can cause the consumption of electrical energy to continue to increase, including in West Sumatra Province. To meet the needs of electrical energy in the future, it is necessary to build and develop the existing electrical system at PT. PLN (Persero) in order to serve the needs of electrical energy in the future. One of them is by predicting or predicting the demand for electrical energy in the next few years by utilizing historical data on the consumption of electrical energy in the past. In this study, the authors predict the electricity needs of West Sumatra Province from 2019 to 2028. The need for electrical energy tends to increase from year to year. In 2019 the need for electrical energy is 3,705 GWh, while in 2028 it is 6,980 GWh with an average growth in energy sales of 7.29 percent. The household sector has the highest demand for electrical energy in 2028, namely 3,769 GWh with an average percentage increase per year of 6.6 percent. Keywords: Power system planning, Electrical energy consumption, Generation planning and Electrification ratio.
Evaluation of Future Battery Electric Vehicles as an Environmentally Friendly Transportation Means: A Review Matalata, Hendi; Syafii, Syafii; Hamid, Muhammad Imran
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 1 (2023): March 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i01.67

Abstract

The climate challenge is an energy challenge. thus, policymakers around the world are trying to accelerate the adoption of clean energy technologies. The Global Energy Review said that global CO2 emissions from energy combustion in 2021 reached the highest annual level with an increase of 6% from 2020, The automotive sector is very important to achieve net zero global emissions by 2050 based on the agreement with the world in the Scenario Net Zero Emissions by 2050. in which in 2035 sales of internal combustion engine cars (ICE) will be stopped. In this case, of course, electric vehicles are an alternative to the field of future land transportation that uses batteries as fuel that utilizes renewable energy as a charger for electric vehicles. Electric vehicle charging infrastructure (EVCI) is a key driver of increased electrification mobility shifting away from internal combustion engines given that the specific geographical distribution of a region and its demographics are factors influencing the adoption of electric vehicles. This paper was written to review the state-of-the-art of Battery Electric Vehicle (BEV), a PV energy source in terms of renewable energy utilization, energy generation, batteries, and charging stations. PV generation is extensively reviewed, and although this research is quite extensive, some gaps need to be investigated for further research on commercial and residential aspects as a means of operating batteries for electric vehicle charging stations based on PV and BESS (Battery Energy Storage System). Regulations on the use of battery electric vehicles as an environmentally friendly means of transportation will grow based on government policies from each country
Evaluation of Photovoltaic Penetration on System Grid with Minimum Loading Approach Habibullah, Dawam; Moe, Khin Moe; Syafii, Syafii
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 2 (2023): July 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i2.95

Abstract

The Indonesian government has also set a target to increase the contribution of renewable energy in the national energy mix to 23% by 2025 and 31% by 2050. In this paper, an analysis of Maximum PV Capacity was used on the transmission network with a minimum loading approach using the Power Factory15.1 simulation. From the simulation that has been done, it can be seen that the placement of two PV location points gets better results than the placement of one PV location point. This can be seen that the feeder load for PV location point of 74.3%, while for two PV location points of 35.8% which value is still within safe limits, but for two PV location points get better results. PV trip state frequency values obtained for single location point and two PV location points get a result of 2% of 50 Hz which is still within safe limits.
Integration of Photovoltaic Distributed Generation in Grid Distribution Network: A Literature Review Maharmi, Benriwati; Syafii, Syafii; Azhari Zakri , Azriyenni
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i3.114

Abstract

Distributed Generation (DG) will become a future generation system known as a renewable energy source. Renewable energy is a topic being developed due to being environmentally friendly. It fulfills the need for electrical energy to replace fossil energy sources to reduce climate change due to carbon emissions towards net-zero emissions by 2050, reducing climate change by 1.50 C to 20 C. Solar photovoltaic (PV) is an energy source that has been widely developed and has enormous potential; where PV can be integrated off the grid and on the grid. Integrating PV into the network is challenging, so the network remains stable and reliable due to intermittent energy generation. This paper reviews the integration of PV-DG distribution networks. Topology, optimization, and impacts on the distribution network are also discussed in this paper. The literature review results show that PV-DG integrated into the grid has an impact caused by intermittent PV generation.
Kepuasan Pasien Terhadap Pelayanan Kesehatan Metode Importance Perfomance Analysis (IPA) RSU Kartini - Lampung Layrenshia, Belinda; Gumilar, Candra; Beni Nugroho, Dionysius; Maulidi, M. Alfi; Syafii, Syafii; Liambana, Junlianty; Noor Azahra, Anggraeni; Since Yuliana Frans, Inggrid; Purwadhi, Purwadhi; Veranita, Mira
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 3 (2024): COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v4i3.1368

Abstract

Pelayanan kesehatan yang memuaskan semakin diakui karena pentingnya kesehatan bagi masyarakat. Pelayanan kesehatan berusaha untuk membuat pelanggan puas dengan memberikan layanan yang efektif dan efisien. Dengan menggunakan metode Importance Performance Analysis (IPA), penelitian ini menganalisis kepuasan pasien di RSU Kartini Lampung. Kinerja dan kepentingan pelayanan diukur dari 20 responden yang dibagi dalam dua kelompok usia: yang di bawah 45 tahun dan yang di atas 45 tahun. Hasil analisis menunjukkan bahwa untuk responden di bawah 45 tahun, rata-rata nilai kinerja (X) sebesar 4,2 dan kepentingan (Y) sebesar 4,5, dan untuk responden di atas 45 tahun, rata-rata nilai kinerja (X) sebesar 4,2 dan kepentingan (Y) sebesar 4,4. Ada gap -0,3 dan -0,2 antara kinerja dan kepentingan. Menurut analisis IPA, responden di bawah usia 45 tahun memerlukan kamar yang bersih, nyaman, dan menarik, tetapi mereka di atas usia 45 tahun menganggap sudah baik dan harus mempertahankannya. Hasil ini menunjukkan bahwa untuk meningkatkan kepuasan pasien secara keseluruhan, kualitas pelayanan harus disesuaikan dengan persepsi dan kebutuhan pasien dari berbagai kelompok umur
Pengembangan Perekonomian Pedesaan Berbasis Agrowisata Syafii, Syafii; Irianto, Heru; Nurany, Fierda; Elysia Sholiha, Almira Rahma; Handayani, Mia Putri
Jurnal Ilmiah Muqoddimah: Jurnal Ilmu Sosial, Politik dan Hummaniora Vol 8, No 4 (2024): November 2024
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jim.v8i4.2024.%p

Abstract

Pengembangan ekonomi pedesaan berbasis pariwisata merupakan strategi yang menjanjikan untuk meningkatkan kesejahteraan masyarakat pedesaan. Wonosalam adalah penghasil buah-buahan, yang terdiri dari duren, salak, manggis, pisang, alpokat, produk pertanian "polo pendem", dan penghasil susu sapi dan susu kambing Etawa. Namun sayangnya, tenaga agrowisata di Wonosalam berasal masyarakat petani yang mengelola kebunnya secara tradisional. Selain itu kurangnya akses transportasi dan infrastruktur yang memadai. Koneksitas dengan wilayah lain seperti Batu, Mojokerto, Kediri merupakan hal yang harus segera dibangun agar dapat meningkatkan kunjungan wisata. Metode penelitian yang digunakan dengan kualitatif deskriptif. Teknik pengumpulan data dengan melakukan forum group discussion (FGD) bersama para petani dan pejabat pemerintahan di Wonosalam. Hasil penelitian menjelaskan bahwa petani di wonosalam mengembangkan kegiatan bertaninya sebagai salah satu destinasi wisata pertanian seperti edukasi, petik buah, kuliner, dan agroindustri. Di bidang jasa, agrowisata di Wonosalam memiliki pilihan akomodasi seperti penyedia homestay, camping ground dan kegiatan wisata. Faktor penghambat berkembangnya di Wonosalam meliputi kurangnya tenaga ahli dalam pengelolaan agrowisata. Hal ini terjadi karena tenaga agrowisata di Wonosalam berasal masyarakat petani yang mengelola kebunnya secara tradisional. Selain itu kurangnya akses transportasi dan infrastruktur yang memadai. Kurangnya dukungan dinas terkait terhadap agrowisata dapat menghambat perkembangan agrowisata di berbagai daerah. Upaya pengembangan agrowisata Wonosalam yaitu dengan pengembangan kapasitas SDM, perlu mengembangkan paket wisata yang menarik dan unik, perlu mengembangkan kelembagaan yang kuat dengan tujuan dan visi yang telah ditetapkan. Mempromosikan pariwisata melalui berbagai platform media seperti website, media sosial dan agen perjalanan. Dengan demikian pengembangan perekonomian pedesaan berbasis agrowisata masih perlu di tingkatkan.Kata kunci: Agrowisata; Ekonomi; Pedesaan; Pertanian; Wonosalam
An internet of things-based weather system for short-term solar and wind power forecasting using double moving average Syafii, Syafii; Nur Izrillah, Imra; Aulia, Aulia; Ilhamdi Rusydi, Muhammad
Bulletin of Electrical Engineering and Informatics Vol 14, No 5: October 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i5.9852

Abstract

This article presents the design and implementation of an internet of things (IoT)-based weather forecasting system aimed at optimizing operational planning for renewable energy generation. The system leverages a Raspberry Pi as its central controller, integrating pyranometer and anemometer sensors for real-time data collection and predictive analytics. Utilizing the double moving average method, the system provides accurate short-term forecasts of solar and wind power outputs, which are crucial for addressing the intermittency challenges of renewable energy sources. The integration with the Blynk platform ensures user-friendly data visualization and accessibility. Results from a three-day testing phase reveal the system's high accuracy, with prediction errors of 8.79% for solar power and 16.49% for wind power. These findings underscore the system's potential to enhance energy planning, improve efficiency, and support sustainability goals. By enabling data-driven decision-making, this IoT-based forecasting system offers a scalable solution for advancing renewable energy integration into the power grid.
Optimization of Thermal Power Plant Operations Using Genetic Algorithms Sapto Nisworo; Hasibuan, Arnawan; Syafii, Syafii
JURNAL NASIONAL TEKNIK ELEKTRO Vol 12, No 3: November 2023
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v12n2.1090.2023

Abstract

Accurate scheduling of capacity and operating time for electricity generation is intended to be able to determine the start and end periods of electricity generation operations and produce power output that can meet load requirements. In this research, the goal to be achieved is to know the existence of power plants when to start operating and when to stop operations and to minimize operational costs by dividing the value of the power that will be generated at each power plant. Genetic algorithms are applied to thermal power plant data patterns to design a scheduling plan. The process involves combining the six power generating units to be tested into three different samples. It was found that the total power load and total cost for Sample 1 was 78,109 MW and IDR 200,285, 66.26, Sample 2 was 74,497 MW and IDR 149,774,156.41, and Sample 3 was 78,681 MW and IDR 156,297,893, respectively. 08. This shows that the cost of sample 1 compared to sample 2 decreased by 25.22%, then in sample 2 when compared to sample 3 it increased by 4.17%. The data also shows that a higher number of generations results in lower costs. Therefore, genetic algorithms produce better solutions from one generation to the next.
A Systematic Review of Optimal Power Flow Studies with Renewable Energy Sources Penetration Maulana, Ricky; Syafii, Syafii
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.357

Abstract

The increasing penetration Renewable Energy Source (RES) in electrical power grid, the power system must minimize costs and comply with operational and safety requirements. Optimal power flow (OPF) contributes to this objective by determining the optimal control settings, satisfying system and safety constraints, and enhancing operational efficiency. A systematic review was conducted to assess how OPF studies have been evaluated in the literature. The review analyzed 64 journal articles to identify specific OPF studies from three perspectives: type of RES penetration, objective function, and method of OPF. The results indicate that (a) wind turbines are the most commonly used RES model in OPF studies, (b) cost function is the primary objective that the majority of research has considered, and (c) novel meta-heuristics have often been used in OPF methods under uncertain RES penetration. This systematic review identifies research gaps and topics for further research to study OPF with RES penetration. The findings are expected to benefit researchers in deciding the best OPF method under uncertain RES.
Co-Authors ., Cahayahati ., Delima ., Erliwati ., Kamshory Abadi, Akbar Aditio Pribadi, Rizki Adrianti Adrianti Adrianti, Adrianti Agung W. Setiawan Akshar, Muh Alex, Taman Ali Basrah Pulungan Almoataz Youssef Abdelaziz Andi Pawawoi Andrivo Rusydi Arnawan Hasibuan Arya, Engla Harda Asrizal . Aswardi Aswardi Aulia Aulia Aulia Aulia Axel Doriza Azhari Zakri , Azriyenni Azizah, Farah Azriyenni Azhari Zakri Azzahrah, Nadia Fatimah Beni Nugroho, Dionysius Benriwati Maharmi Budi Endarto Cahayahati . Chamdani Chamdani Dadan Ramdan Danas, Aidil Darmana, Ija Dawam Habibullah Dawam Habibullah Delima . Dian Noviandri Dina Maizana Dona Juliandri Edyan Noveri Elmiyasna Kimin Elysia Sholiha, Almira Rahma Endang Tri Wahyuni Erliwati . Fahreza, Rahmad Fajril Akbar Farah Azizah Fierda Nurany, Fierda Fikriyatullatifah, Anisa Fitriyan, Rahmawati Gumilar, Candra Habib Satria Habib Satria Habibullah, Dawam Hanalde Andre Handayani, Mia Putri Hasdi Putra, Hasdi Herris Yamashika Herris Yamashika Heru Irianto Ija Darmana Ika Putri, Kartika Ilham Cholid Ilhamdi Rusydi, Muhammad Imam Fauzi Ath Thaariq Indrajaja, Nobella Indri Dayana Irfan El Fakhri Ita Merni Patulak Jaka Windarta Juliandri, Dona K. M. Nor K. M. Nor K. M. Nor Kamsidjo Budi Utomo Kamsory Kamsory, Kamsory Kartika Ika Putri Kartika Sri Kumala Sari Khin Moe Moe Kurniawan, Sulistyo Agung Dwi Kusnadi, Sekar Ayumeida Laksono, Heru Dibyo Layrenshia, Belinda Leily Wustha Johar Liambana, Junlianty Lovely Son, Lovely M. Yonggi Puriza Maharmi, Benriwati Marroh, Zahrotul Isti'anah Matalata, Hendi Maulidi, M. Alfi Moe, Khin Moe Mohammad Taufiq Hidayat Monice Monice Moranain Mungkin Muhammad Fadlan Siregar Muhammad Hadi Putra, Muhammad Hadi Muhammad Imran Hamid Muhammad Khahfi Zuhanda Muhammad Nasir Muhammad Nurdin Muhammad Ridha Fauzi Muhardika Muhardika Mumtazah, Lutfia Anis Muzamir Isa Nasir, Hikmah Afifah Nasir, Muhammad Nofri Dodi Noor Azahra, Anggraeni Novizon, Novizon Nur Izrillah, Imra Nurdin, Muhammad Nurmarini, Eva Perdana Putra, Ilham Prihadini, Diana Purwadhi Purwadhi Putri, Lusi Ngestina Rahmad B.Y Syah Rahmad Fahreza Rahmawati Fitriyan Refdinal Nazir Ricky Maulana Ridwan, Ridwan Rizka Hadelina Roni Putra Rudi Salam Rusydi, Muhammad Ilhamdi Salfikri, Iqbal Sapto Nisworo Since Yuliana Frans, Inggrid Slamet Raharjo Sugiono Sugiono Syah, Rahmad B. Y. Syah, Rahmad B.Y Syukri Yunus Tahrir, Muhammad Thoriq Kurnia Agung Thoriq Kurnia Agung Veranita, Mira Wati Wati Wati Wati Wati, Wati Welly Yandi Yandi, Welly Yona Mayura Yudi Arfan Yusdiansyah, Yusdiansyah Zahroni, Teguh Rizali Zarta, Abdul Rasyid Zulwisli .