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All Journal Jurnal Sains dan Teknologi Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Fisika Unand Jurnal Kelautan Tropis JURNAL ENGGANO JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Pendidikan Fisika dan Teknologi Silampari Jurnal Pendidikan Ilmu Fisika Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Maritime Park: Journal Of Maritime Technology and Socienty Indonesian Journal of Community Empowerment and Service
Johan, Septi
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Aerospace Engineering Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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The Influence of Wind Dynamics and Longshore Currents on Shoreline Changes in the Lais Segment, North Bengkulu, Based on Seasonal Variations Supiyati; Ekawita, Riska; Johan, Septi; Dari, Evita Sri Wulan
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 2 (2025): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v14i2.95817

Abstract

Pantai Lais mengalami perubahan garis pantai yang sangat cepat yang disebabkan abrasi dan sedimentasi. Penelitian ini bertujuan untuk mengidentifikasi karakteristik dinamika angin dan  Longshore  Current, dan pemetaan perubahan garis pantai di segmen Pantai Lais.  Penelitian ini merupakan penelitian kuantitatif-deskriptif. Subjek penelitian mencakup data oseanografi seperti kecepatan dan arah Longshore  Current, kecepatan angin, serta tinggi dan periode gelombang laut yang diperoleh melalui pengukuran langsung di lima titik pengamatan pada dua musim peralihan. Data yang sudah diperoleh kemudian dianalisis secara deskriptif dan kuantitatif. Temuan penelitian menunjukan perubahan garis pantai di segmen Lais sangat dipengaruhi oleh dinamika angin dan Longshore  Current, dimana angin adalah faktor utama pembangkit gelombang. Ketinggian gelombang laut akan menimbulkan gelombang pecah yang merupakan penyebab terbentuknya Longshore  Current. Ketinggian gelombang laut dan kuatnya energi gelombang menghantam dinding pantai, mengakibatkan pinggir pantai terabrasi. Material terabrasi ini akan ikut terbawa oleh Longshore  Current   sesuai dengan arah gerak arus mengalir, yang kemudian akan menumpuk di daerah yang kecepatan aliran arus lemah atau mengecil, sehingga terjadi sedimentasi. Rata-rata sedimentasi selama 10 tahun terakhir sebesar 10,60 meter/tahun, dengan sedimentasi tertinggi terjadi tahun 2017 sebesar 29,05. Sedangkan rata-rata abrasi selama 10 tahun terakhir 13,03 meter/tahun, dengan abrasi tertinggi tahun 2015 sebesar 20,5 m. Penelitian ini berimplikasi dalam perencanaan zona pesisir, terutama dalam mitigasi erosi pesisir, perencanaan ruang pesisir, dan perlindungan pemukiman serta infrastruktur yang rentan terhadap abrasi.
PELATIHAN PENGEMBANGAN BAHAN AJAR BERBASIS DIGITAL MENGGUNAKAN CANVA BAGI GURU-GURU SDIT NURUL FIKRI KOTA BENGKULU XXX, SATURN; Johan, Septi; Supiyati, Supiyati; Kurniawan, Chandra; Johan, Henny
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 2 (2025): December 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i2.43508

Abstract

Kegiatan pembelajaran daring menuntut guru untuk melakukan berbagai penyesuaian, baik metode maupun media pembelajaran, agar materi dapat tersampaikan dengan efektif kepada peserta didik tanpa memberatkan mereka. Salah satu alternatif media yang dapat digunakan adalah bahan ajar digital berbasis e-modul. Kegiatan pengabdian kepada masyarakat (PPM) ini bertujuan untuk meningkatkan kompetensi guru dalam mengembangkan bahan ajar digital menggunakan aplikasi Canva. Metode pelaksanaan kegiatan terdiri atas tahap persiapan, pelaksanaan pelatihan, dan evaluasi. Tahap persiapan meliputi perizinan, koordinasi dengan mitra, serta penyiapan alat, bahan, soal pre-test dan post-test, serta materi pelatihan. Koordinasi awal dilakukan bersama Kepala Sekolah SDIT Nurul Fikri Kota Bengkulu untuk menyusun jadwal dan teknis pelaksanaan kegiatan. Tahap selanjutnya adalah pelaksanaan kegiatan, sosialisasi diawali dengan pre-test untuk mengukur pengetahuan awal peserta tentang Canva, dilanjutkan dengan sosialisasi dan pelatihan pembuatan bahan ajar digital menggunakan Canva, serta diakhiri post-test untuk mengevaluasi hasil pelatihan. Berdasarkan hasil post-test, seluruh peserta telah mencoba membuat bahan ajar digital dan mengenal fitur-fitur Canva. Hasil pre-test dan post-test menunjukkan adanya peningkatan pemahaman peserta sebesar 95% setelah mengikuti kegiatan ini. Kegiatan ini diharapkan dapat menjadi solusi efektif bagi guru dalam menghadapi tantangan pembelajaran daring yang menarik dan inovatif.
Training on the Utilization of the HVSR Geophysical Method Based on the Concept of Mechanical Wave Propagation for Earthquake Hazard Potential Analysis in Kuto Rejo Village Hadi, Arif Ismul; Refrizon; Muda Lubis, Ashar; Johan, Septi; Halauddin
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 2 (2025): December 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i2.45281

Abstract

Kepahiang Regency has a high potential for earthquake hazards. This is because the Kepahiang area is located in the subduction zone of the Indo-Australian tectonic plate movement in the ocean and the movement of the Musi segment of the Sumatra fault on land as the main fault. As an area with high earthquake hazard potential and its location near the Musi segment fault, efforts are needed to reduce the risk of disasters due to earthquakes through the activity "Training on the Utilization of the Horizontal to Vertical Spectral Ratio (HVSR) Geophysical Method”. The HVSR method is a geophysical method based on the concept of mechanical wave propagation. HVSR measurements can be used to understand the structural properties of subsurface. The target audience for this activity is Village Apparatus and Residents of Kuto Rejo Village, Kepahiang Regency. This activity aims to provide an understanding of the basic concepts of mechanical wave propagation in rocks and provide training in the use of the HVSR method. The method used is through the stages of focus group discussion (FGD), field data acquisition, processing, interpretation and evaluation. The indicator of the achievement of the objectives of this activity is if each activity participant can acquisition, process, analyze, and interpret and answer the questionnaire related to the community service material correctly. The results of this activity provide insight into the importance of local wisdom-based earthquake hazard mitigation for disaster risk reduction. Village Apparatus and Residents of Kuto Rejo Village will continuously share their knowledge with other villagers from this activity.
Variabilitas Suhu di Samudera India Pada Saat Indian Ocean Dipole Positif Tahun 2006 Johan, Septi
JURNAL ENGGANO Vol. 10 No. 1 (2025)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.10.1.20-27

Abstract

The Indian Ocean Dipole (IOD) is a phenomenon of ocean and atmosphere interaction characterized by differences in sea surface temperature between the eastern (90oE-110oE and 10oS-0oN) and western (50oE-70oE and 10oS-10oN) of Indian Ocean. This study examines the variability of the temperature of the Indian Ocean during the positive evolution of the Indian Ocean Dipole (IOD) in 2006. The data used in this research are Sea Surface Temperature (SST) data, wind data, monthly Sea Surface Height (SSH) data and current velocity data. zonal. These data were then analyzed using a low-pass filter with a 13-month cut-off period to observe the IOD phenomenon. The results of this study indicate that positive IOD evolution in 2006 was identified through the IOD Index, this is also supported by the results of temperature data analysis. Based on temperature data, there is a pattern of temperature differences between the eastern and western regions of the Indian Ocean. In May, the surface temperature begins to decrease, indicating the start of the IOD evolutionary phase. IOD began to occur in May with a temperature of -0.5oC. Over time, IOD evolution reaches a peak in September-October with a temperature of -1.8oC and begins to experience evolutionary decay in November-December with a temperature of -0.2oC. IOD evolution that occurs on the surface is influenced by zone currents and surface wind movements that move to the left. The positive IOD movement to the west also affects the decrease in sea level in the west coast of Sumatra which is marked by a negative value of SSHA.   Keywords: Indian Ocean Dipole, Lowpass Filter, Temperature
Co-Authors Agustina, Tari Amalia, Isra Anwar, Anang Arif Ismul Hadi Chandra Kurniawan, Chandra Dari, Evita Sri Wulan Devi Permata Sari Devicawati, Devicawati Edkayasa, Mardho Tillah Eko Risdianto Gerry, Muamar Gita Rahma Sari Halauddin Henny Johan Limbong, Rospita Naomi Lizalidiawati Lizalidiawati Muda Lubis, Ashar Norfahmi, Siti Hairunnisa Putri, Desy Hanisa Putri, Hestyna Eka Refrizon Riska Ekawita Rosyid, Muhammad Ilham Septianingsih, Dwi Silaban, Angeli Sudirman Sudirman Supiyati . Suwarsono Suwarsono Umaya Umaya, Umaya Wahyuni, Ani Sri Widiasih, Widiasih XXX, SATURN