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ANALYSIS OF DAILY AND ANNUAL VARIATIONS OF SOLAR RADIATION, AIR TEMPERATURE, PRECIPITATION, WIND SPEED, HUMIDITY, AND AIR PRESSURE IN LAMPUNG AS INDICATORS OF RENEWABLE ENERGY Ayu Aprilia; Ahmad Faruq Abdurrahman; Annisa Ananda
Indonesian Journal of Science Education and Applied Science Vol 4, No 2 (2024)
Publisher : Program Studi Pendidikan IPA, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/i.v4i2.14286

Abstract

This study aims to analyze the potential for renewable energy development in Lampung Province, Indonesia, using data from NASA POWER and then integrating it with regional geographic and climate characteristics. The analysis focuses on three main types of renewable energy: solar, wind, and hydropower. In solar energy, Pesisir Barat shows significant potential with high and consistent solar radiation levels, averaging 18.61 kWh/m²/day, and stable temperature conditions, making this area suitable for solar photovoltaic (PV) systems. However, Mesuji shows lower solar radiation but remains a candidate for further exploration. Humidity patterns show minimal impact on solar radiation, while stable air pressure improves solar energy prospects in most areas. Based on the analysis, wind energy has limited potential for large-scale projects due to low wind speeds, averaging 1.0–2.5 m/s, but it can be used for micro-scale applications in coastal areas such as the Pesisir Barat and South Lampung. Hydropower presents significant opportunities, particularly in areas with high precipitation and significant topographic variation, such as West Lampung and Tanggamus, which are ideal for large-scale hydropower and micro-hydro systems. Seasonal precipitation patterns and stable air pressure support renewable energy development by providing predictable resource availability.Keywords: Energy, Lampung, NASA POWER. Studi ini bertujuan untuk menganalisis potensi pengembangan energi terbarukan di Provinsi Lampung, Indonesia, dengan menggunakan data dari NASA POWER dan kemudian mengintegrasikannya dengan karakteristik geografis dan iklim regional. Analisis difokuskan pada tiga jenis utama energi terbarukan: tenaga surya, angin, dan tenaga air. Dalam energi surya, Pesisir Barat menunjukkan potensi yang signifikan dengan tingkat radiasi surya yang tinggi dan konsisten, rata-rata 18,61 kWh/m²/hari, dan kondisi suhu yang stabil, menjadikan wilayah ini cocok untuk sistem fotovoltaik surya (PV). Namun, Mesuji menunjukkan radiasi surya yang lebih rendah tetapi tetap menjadi kandidat untuk eksplorasi lebih lanjut. Pola kelembapan menunjukkan dampak minimal pada radiasi surya, sementara tekanan udara yang stabil meningkatkan prospek energi surya di sebagian besar wilayah. Berdasarkan analisis, energi angin memiliki potensi terbatas untuk proyek skala besar karena kecepatan angin yang rendah, rata-rata 1,0–2,5 m/s, tetapi dapat digunakan untuk aplikasi skala mikro di wilayah pesisir seperti Pesisir Barat dan Lampung Selatan. Pembangkit listrik tenaga air menawarkan peluang yang signifikan, terutama di daerah dengan curah hujan tinggi dan variasi topografi yang signifikan, seperti Lampung Barat dan Tanggamus, yang ideal untuk sistem pembangkit listrik tenaga air dan mikrohidro skala besar. Pola curah hujan musiman dan tekanan udara yang stabil mendukung pengembangan energi terbarukan dengan menyediakan ketersediaan sumber daya yang dapat diprediksi.Kata kunci: Energi, Lampung, NASA POWER.
Pelatihan Penggunaan LaTeX Untuk Penulisan Skripsi Bagi Mahasiswa Program Studi Sarjana Matematika FMIPA Universitas Lampung Mega Sapitri, Nonik; Sawitri, Riza; Wamiliana; Abdurrahman, Ahmad Faruq
ABDI AKOMMEDIA : JURNAL PENGABDIAN MASYARAKAT Vol. 2 No. 4 (2024)
Publisher : ABDI AKOMMEDIA : JURNAL PENGABDIAN MASYARAKAT

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Abstract

The purpose of this community service activity is to improve the ability of students of the Bachelor of Mathematics Study Program FMIPA University of Lampung to use LaTeX for thesis writing. LaTeX was chosen because it is able to produce documents with a professional format, especially in managing mathematical equations and document layout. The training was held on October 24, 2024 at the Computer Laboratory ofthe Mathematics Department with 19 fifth semester students participating. The methods used include providing training modules, using LaTeX-based thesis templates, and hands-on practice using the Overleaf platform. The training results showed that 95% of participants recognized theimportance of using LaTeX, with 93% feeling satisfied with the training implementation. However, time efficiency was evaluated with a score of 80%, indicating the need for further training. Participants showed high enthusiasm and were able to practice LaTeX features, including table creation and writing mathematical equations. Through this training, students are equipped with technical skills to produce a thesis that is not only content-quality but also meets academic standards. Thus, this activity supports the strengthening of student competencies while supporting the University of Lampung as a higher education institution that excels in academics and research.
Peningkatan Kompetensi Guru IPA SD di Kecamatan Metro Utara Melalui Pelatihan Pembuatan dan Pengembangan Alat Peraga Fisika Supriyanto, Amir; Pauzi, Gurum Ahmad; Karo-Karo, Pulung; Syafriadi, Syafriadi; Abdurrahman, Ahmad Faruq; Aprilia, Ayu
RENATA: Jurnal Pengabdian Masyarakat Kita Semua Vol. 2 No. 3 (2024): Renata - Desember 2024
Publisher : PT Berkah Tematik Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61124/1.renata.91

Abstract

Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan kompetensi guru IPA SD di Kecamatan Metro Utara dalam merancang dan mengembangkan alat praktikum sederhana untuk mendukung pembelajaran IPA, khususnya Fisika. Pelatihan ini mencakup ceramah, diskusi dan praktik pembuatan media praktikum. Media praktikum yang dibuat antara lain media pembelokan cahaya, konveksi pada zat cair dan termometer sederhana. Evaluasi dilakukan melalui pre-test dan post-test untuk mengukur perubahan pengetahuan dan keterampilan guru. Rata-rata nilai peserta pelatihab meningkat signifikan dari 26,92% menjadi 63,08%. Hal ini menunjukkan efektivitas pelatihan dalam meningkatkan pemahaman konsep dan keterampilan praktikum. Hal ini diharapkan berdampak positif pada kualitas pembelajaran IPA di tingkat sekolah dasar, menjadikan Fisika sebagai mata pelajaran yang menarik dan mudah dipahami oleh siswa. Kata kunci: guru IPA SD; alat praktikum sederhana; pembelajaran Fisika; evaluasi pelatihan Abstract This community service activity aims to enhance the competencies of elementary science teacher in Metro Utara in designing and developing simple practical tools to support science learning, especially Physics. The training involved lectures, discussions, and practical sessions to create simple practical media, such as tools for demonstrating convection in liquids, light reflection, and simple thermometer construction. Evaluation was conducted through pretest and posttest to measure changes in the teachers ‘knowledge and skill. The participants’ average scores increased significantly from 26,92% to 63,08%, indicating the training’s effectiveness in improving conceptual understanding and practical skills. These results are expected to positively impact the quality of science education at the elementary level, making Physics an engaging and easily understood subject for student. Keywords: elementary science teachers; simple practical tools; Physics learning; training evaluation
Extraction of Nanocellulose from Bagasse Using Acid Hydrolysis Method Zaharani, Rethanita; Manurung, Posman; Firdaus, Iqbal; Asmi, Dwi; Abdurrahman, Ahmad Faruq
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 4 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i4.192

Abstract

The acid hydrolysis method was used to extract nanocellulose from bagasse. This study aims to prepare nanocellulose from sugarcane bagasse by acid hydrolysis method and to know the results of characterization with X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared (FTIR). In this study, 4 samples were made with variations of H2SO4 of 19, 29, 39 and 45%. XRD analysis shows that with the increase of sulfuric acid, the percentage of each sample increases, but in the 39% sample, there is a decrease in purity because there are still areas of cellulose that have yet to disappear. The phase identification results show that in the sample with 19, 29, and 39% addition, H2SO4 Iα, Iβ, and thenardite phases were formed. In the sample, 45% only form Iα and Iβ phases with a resulting particle size of 2.83 nm and a degree of crystallinity of 55.52%. The results of the SEM test analysis show that the image pattern has stone structures that overlap each other. The results of FTIR analysis show that the functional groups detected are O – H, C – H, C ≡ C, C = C, H – C – H, C – O, and C – O – C, which indicates the presence of nanocellulose.
Integration of Machine Learning and NASA POWER Dataset for Predicting Coffee Production in Lampung Aprilia, Ayu; Wahidin, Alka Budi; Abdurrahman, Ahmad Faruq
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 22, No 1 (2025): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v22i1.20980

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The production of coffee in Indonesia, particularly in Lampung, plays a crucial role in both the local and national coffee sectors. Weather plays a crucial role in the development of coffee trees. Nonetheless, the coffee production is frequently hindered by unpredictable weather conditions. This can be foreseen through the use of scientific forecasting. Blending agriculture and science can maximize coffee production and effective resource utilization. This study creates a predictive model for coffee production by combining machine learning methods with the NASA POWER dataset. Data from NASA POWER is used to acquire information on various weather factors that impact the growth of coffee trees, including solar radiation, temperature, humidity, pressure, soil wetness, and wind speed. Additionally, information on coffee production is sourced from BPS-Statistics Indonesia. The Random Forest algorithm is used to model the connection between variables. The study findings demonstrate that combining machine learning with remote sensing can offer an effective model. Assessment of the R2, RMSE, and MSE figures shows satisfactory results, though not flawless. This happens due to external factors beyond the weather that influence coffee cultivation. The combination of machine learning and remote sensing is incorporated into a website. This model has the potential to be transformed into an app that offers precise details on coffee cultivation in Lampung. This research highlights how remote sensing data can offer insights into predicting sustainable agriculture outcomes.
CORONA DISCHARGE SEBAGAI TEKNOLOGI STERILISASI RAMAH LINGKUNGAN UNTUK PENGENDALIAN BAKTERI Abdurrahman, Ahmad Faruq; Manurung, Posman; Sumardi, Sumardi; Firdaus, Iqbal; Asmi, Dwi
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 10 No 1 (2025): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v10i1.20632

Abstract

Lucutan corona merupakan salah satu bentuk teknologi plasma dingin yang menjanjikan dalam aplikasi sterilisasi karena kemampuannya menghasilkan radikal oksigen reaktif (ROS) yang efektif dalam menonaktifkan mikroorganisme. Penelitian ini mengkaji karakteristik geometri, konfigurasi elektroda, serta parameter operasi lucutan corona dalam berbagai studi yang telah dipublikasikan. Hasil analisis menunjukkan bahwa konfigurasi pin-to-plate lebih banyak digunakan dibandingkan surface discharge karena kemampuannya menghasilkan medan listrik terfokus dengan intensitas tinggi. Tegangan operasi berkisar antara 10–30 kV dengan frekuensi 0.5–20 kHz, tergantung pada lingkungan bakteri uji. Beberapa jenis bakteri patogen, seperti Pseudomonas aeruginosa, Staphylococcus aureus, Serratia liquefaciens, Salmonella typhimurium, Listeria monocytogene, dan Escherichia coli, terbukti dapat dinonaktifkan secara efektif oleh plasma corona. Namun, tantangan dalam optimasi parameter, efisiensi energi, dan penerapan dalam skala industri masih menjadi hambatan yang perlu diselesaikan. Oleh karena itu, diperlukan penelitian lebih lanjut untuk meningkatkan efektivitas dan efisiensi teknologi ini dalam berbagai aplikasi, termasuk di bidang medis, pangan, dan pengolahan limbah.
IDENTIFIKASI REACTIVE OXYGEN SPECIES PADA PLASMA DIELECTRIC BARRIER DISCHARGE KONFIGURASI MESH-COPPER YANG DIRANGKAI SINGLE DAN DOUBLE MENGGUNAKAN OPTICAL EMISSION SPECTROSCOPY: Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abdurrahman, Ahmad Faruq; Aprilia, Ayu; Zahar, Intan; Kusumandari, Kusumandari; Saraswati, Teguh Endah
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p13-20

Abstract

Penelitian ini bertujuan untuk mengidentifikasi reactive oxygen species (ROS) yang dihasilkan oleh plasma dielectric barrier discharge (DBD) pada konfigurasi rangkaian single dan double menggunakan Optical Emission Spectroscopy (OES). Variasi reaktor DBD digunakan untuk mengevaluasi spektrum emisi plasma. Hasil menunjukkan bahwa intensitas spektrum emisi pada rangkaian double secara umum lebih tinggi dibandingkan dengan Single. Produksi radikal OH dan O pada konfigurasi double lebih stabil, sementara emisi spektrum N₂ menunjukkan intensitas yang lebih besar dibandingkan dengan single. Stabilitas ini diuji lebih lanjut pada sampel dengan pH basa, yang menunjukkan penurunan pH menuju netral. Pengukuran suhu menunjukkan kestabilan selama proses berlangsung, menjadikan konfigurasi double DBD efektif untuk penelitian yang membutuhkan kestabilan suhu larutan. Hasil ini mengindikasikan bahwa rangkaian double dapat meningkatkan efisiensi produksi ROS dalam aplikasi plasma. Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abstract This study aims to identify reactive oxygen species (ROS) generated by dielectric barrier discharge (DBD) plasma in single and double configurations using Optical Emission Spectroscopy (OES). Variations in DBD reactors were employed to evaluate the plasma emission spectra. The results showed that the emission intensity in the double configuration was generally higher than in the single configuration. The production of OH and O radicals in the double configuration was more stable, while the N₂ emission spectrum exhibited higher intensity compared to the single configuration. This stability was further tested on a sample with alkaline pH, which showed a decrease in pH toward neutrality. Temperature measurements demonstrated stability throughout the process, making the double DBD configuration effective for studies requiring solution temperature stability. These findings indicate that the double configuration can enhance ROS production efficiency in plasma applications. Keywords: DBD plasma, reactive oxygen species, optical emission spectroscopy, single and double configurations
Penerapan model inverted class sebagai upaya peningkatana kualitas pembelajaran matematika untuk mahasiswa baru di Jurusan Fisika Universitas Lampung Aprilia, Ayu; Pauzi, Gurum Ahmad; Supriyanto, Amir; Abdurrahman, Ahmad Faruq; Syafriadi, Syafriadi; Karo-karo, Pulung; Suprihatin, Suprihatin; Manurung, Posman
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 3 (2025): May
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i3.30205

Abstract

Abstrak Matematika merupakan fondasi utama dalam penyelesaian berbagai masalah dalam bidang ilmu fisika. Namun, banyak mahasiswa mengalami kesulitan dalam mengusasai konsep-konsep dasar matematika sehingga menganggu prestasi akademik mahasiswa. Pengabdian ini bertujuan mengimplementasi metode inverted class untuk melihat bagaimana keberhasilannya dalam menyelesaikan permasalahan ini. Kegiatan pengabdian dilaksanakan pada minggu ke 3 dan 4 bulan Januari 2025. Kegiatan ini  dibagi menjadi menjadi tiga kegiatan yaitu persiapan kegiatan, pelaksanan kegiatan di kelas serta evaluasi keberhasilan dengan sasaran 55 mahasiswa baru Fisika Unila. Dalam masa persiapakan disusun modul interaktif, menarik dan modern. Lalu dilakukan test pemahaman awal konsep matematika dengan hasil 42,9%. Selanjutnya dilakukan 2 kali pembelajaran dengan inverted class. Pada tahap evaluasi diperoleh peningkatan pemahaman mahasiswa menjadi 60.5%. Dengan tambahan kesan positif terhadap pelaksanaan kegiatan dan modul yang diberikan. Pengabdian ini berhasil menunjukkan bahwa inverted class dapat menjadi solusi untuk mencarik pendekatan yang efektif dalam meningkatkan pemahaman konsep sekaligus melatih kemandirian belajar mahasiswa.  Kata kunci: fisika; inverted class ; mahasiswa baru; pemahaman matematika AbstractHowever, many students struggle to grasp basic mathematical concepts, which negatively impacts their academic performance. This community service program aims to implement the Inverted Class method to evaluate its effectiveness in addressing this issue. The program activities were carried out in 3th dan 4th weeks of January 2025. This program was divided into three stages: preparation, classroom implementation, and evaluation of its success, involving 55 first-year physics students at Universitas Lampung. During the preparation phase, an interactive, engaging, and modern module was developed. An initial test was conducted to assess students' understanding of basic mathematical concepts, yielding an average score of 42.9%. The implementation phase involved two Inverted Class learning sessions. In the evaluation phase, the students' understanding improved significantly, with an average score increase to 60.5%. Additionally, students provided positive feedback on the learning process and the module used. This program successfully demonstrated that the Inverted Class method can serve as an effective approach to improving conceptual understanding while fostering students' independent learning skills. Keywords: inverted class; first-year students; physics; mathematical understanding; independence
Characterization of Corona Plasma Ozone Generators and Analysis of Microbubble Ozone Size for Efficient Mass Transfer Fitryan, Anggyta; Junaidi, Junaidi; Arif Surtono; Eko Yulianto; Eva Sasmita; Muhammad Nur; Ayu Aprilia; Nida Lidya Susanti; Abdurrahman, Ahmad Faruq
Jurnal Multidisiplin Sahombu Vol. 5 No. 06 (2025): Jurnal Multidisiplin Sahombu, September - October (2025)
Publisher : Sean Institute

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Abstract

This study aims to characterize the performance of a corona plasma ozone generator, measure the concentration of ozone produced, and analyze and compare the size of ozone microbubbles from two diffusers (C50 and C80) to evaluate the efficiency of ozone mass transfer. The method used was experimental with equipment including a VOSOCO ozone generator, Ozone Monitor, dimmer, high voltage probe, Kyoritsu ampere clamp, SANWA multimeter, flowmeter, aquarium, Apexel 12.5x macro lens, C50 and C80 diffusers, and an iPhone 11, with Python-based microbubble size analysis software for digital image processing. The results showed that the ozone generator operated at 1200 V with a linear relationship between voltage, current, and power, where the highest ozone concentration was achieved at a flow rate of 0.8 l/min. The C80 diffuser produced smaller and more homogeneous bubbles (average 3.37 µm) compared to the C50 (4.09 µm), increasing the specific surface area by 21.4% for better mass transfer efficiency. The innovation of this research lies in the development of a Python-based analysis system with an effective and affordable digital image processing approach to characterize ozone microbubble size, providing an accurate alternative for analyzing critical parameters for optimizing microbubble-based ozonation systems.
EDUKASI FISIKA MATERIAL DI SMAIT DA’ARUL ILMI LAMPUNG: DARI KONSEP KE APLIKASI Fath, Yusril Al; Prihanto, Surya; Abdurrahman, Ahmad Faruq; Aprilia, Ayu; Firdaus, Iqbal; Manurung, Posman; Suprihatin, Suprihatin; Agnesia, Donna; Pertiwi, Salwa Dian
Jurnal Pengabdian Masyarakat Khatulistiwa Vol 8, No 2 (2025): NOPEMBER
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpmk.v8i2.5601

Abstract

ABSTRACTMaterial physics is an important branch of science that studies the properties and applications of various materials from atomic level as the foundation for modern technological development. The importance of this field encouraged the implementation of a socialization activity aimed at improving students’ understanding of the basic concepts and applications of material physics. The activity was attended by 22 participants and consisted of three stages: an initial survey, socialization using the one group pretest–posttest design through interactive and contextual methods, and data evaluation. The average pretest score of 2.22 increased to 3.45 in the posttest, indicating an improvement based on the Likert scale. These results show that the socialization activity contributed positively to enhancing participants’ understanding and interest in the concepts and applications of material physics. The interactive approach used in the socialization proved effective in strengthening participants’ motivation and insight into this field.Keywords: Physics, material, educationABSTRAKFisika material merupakan cabang ilmu penting yang mempelajari sifat dan aplikasi berbagai material dari tingkat atomik sebagai dasar pengembangan teknologi modern. Pentingnya bidang ini mendorong dilaksanakannya kegiatan sosialisasi yang bertujuan meningkatkan pemahaman siswa terhadap konsep dasar dan penerapan fisika material. Kegiatan diikuti oleh 22 peserta dengan tiga tahap: survei awal, sosialisasi menggunakan metode one group pretest–posttest design secara interaktif dan kontekstual, serta evaluasi hasil. Nilai rata-rata pretest 2,22 meningkat menjadi 3,45 pada posttest, menunjukkan peningkatan poin berdasarkan skala Likert. Hasil ini menunjukkan bahwa kegiatan sosialisasi berkontribusi positif dalam meningkatkan pemahaman dan ketertarikan peserta terhadap konsep serta aplikasi fisika material. Pendekatan sosialisasi yang interaktif terbukti efektif untuk memperkuat minat dan wawasan peserta terhadap bidang ini.Kata Kunci: Fisika, Material, Edukasi