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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 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
Johan, Septi
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Aerospace Engineering 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

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Development of Supplementary Basic Physics Practicum Based on Problem-Solving Method Assisted with Augmented Reality (AR) Technology Johan, Henny; Putri, Desy Hanisa; Risdianto, Eko; Johan, Septi; Sudirman, Sudirman; Widiasih, Widiasih
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 9 No 1 (2023): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 9 Issue 1, J
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.09105

Abstract

Physics practicum is an important activity in basic physics courses that involve contextual physics concepts, such as cases in coastal areas which can demand students’ problem-solving skills. Covid-19 has caused basic physics practicum activities to become difficult to carry out in a laboratory scale, thus alternative solution is necessary to perform practical activities in the Covid-19 situation, namely by utilizing Augmented Reality (AR) technology. AR can help visualize physics concepts and practicum activity procedures relevant to practicum activities. This study aimed to develop an AR-assisted practicum guidebook product oriented toward a problem-solving method by presenting several cases of natural potential in local coastal areas. This study used an R&D method with a 4D model. However, this study was limited to the development stage. Data were collected with validation sheets and student response questionnaire sheets. These data were then analyzed with descriptive qualitative data analysis technique. Based on the data analysis results, many students had difficulties in carrying out physics practicum activities during the Covid-19 pandemic. This occurred due to the unaccessible practicum video procedures in the guidebook during the offline condition. Furthermore, the practicum procedure guidebook was only in narrative text, unable to stimulate high-level thinking skills by presenting coastal area cases. Students must be introduced deeper to the potential of coastal areas and their relation to physics concepts.
AKTIVITAS MASYARAKAT DAN PENGARUHNYA TERHADAP FENOMENA ALAM ABRASI TERINTEGRASI PEMBELAJARAN FISIKA SEKOLAH Umaya, Umaya; Devicawati, Devicawati; Johan, Henny; Johan, Septi
SILAMPARI JURNAL PENDIDIKAN ILMU FISIKA Vol 5 No 2 (2023): Silampari Jurnal Pendidikan Ilmu Fisika (SJPIF)
Publisher : LPPM UNIVERSITAS PGRI SILAMPARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31540/sjpif.v5i2.2227

Abstract

Abrasi merupakan proses alami berupa pengikisan tanah di daerah pantai yang disebabkan oleh gelombang dan arus laut yang merusak, kadang disebut juga erosi pantai. Kerusakan pantai tersebut salah satunya dapat disebabkan oleh terganggunya keseimbangan alam wilayah pesisir. Keausan umumnya disebabkan oleh fenomena alam, tetapi banyak tindakan manusia juga berkontribusi terhadap keausan pantai. Secara sederhana, abrasi adalah pengikisan wilayah pesisir oleh gelombang dan arus yang merusak. Adapun akibat yang ditimbulkan abrasi yaitu penyusutan garis atau area pantai, kerusakan hutan mangrove, permasalahan sampah dan pergeseran mata pencaharian masyarakat sekitar. Dibalik akibat yang ditimbul, ada beberapa hal yang dapat dilakukan dalam mitigasi (upaya) pencegahan dan pengurangan resiko abrasi. Mitigasi terbagi menjadi mitigasi struktural dan mitigasi non-struktural, untuk mitigasi struktural contohnya yaitu penanaman hutan mangrove dan membangun pemecah gelombang dan mitigasi non-struktural menekankan pada aspek perencanaan guna lahan, insentif pemerintah, pelatihan dan pendidikan bagi masyarakat, kesadaran publik. Upaya tersebut tentunya dapat dilakukan oleh pemerintah dan masyarakat sekitar. Termasuk warga sekolah yang berada di pesisir pantai. Guru dapat memberikan pembelajaran mitigasi bencana abrasi dengn mengintegrasikannya kedalam materi Gelombang fisika kelas XI.
IDENTIFICATION OF PHYSICAL OCEANOGRAPHIC PARAMETERS AND MIXING TYPES AT THE TRANSITIONAL SEASON I IN THE ESTUARY OF AIR MANNA REGENCY SOUTH BENGKULU Supiyati, Supiyati; Sari, Devi Permata; Ekawita, Riska; Johan, Septi; Sudirman, Sudirman
Spektra: Jurnal Fisika dan Aplikasinya Vol 8 No 2 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 2, August 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.082.05

Abstract

The recent increase in community activity in the Air Manna Estuary of the South Bengkulu regency, will affect the physical condition of the estuary. Therefore, this research were to determine of the physical oceanographic parameters such as temperature, salinity, current velocity, tidal and the mixing type in the Air Manna estuary, South Bengkulu Regency at the transitional season I. The method used is the measurement of field data directly during high tide and low tide conditions as well as descriptive and quantitative data analysis. The results showed that the characteristics of the physical oceanographic pharameters in the Air Manna Estuary were influenced by tidal condition. The highest current speed at the mouth of the estuary is 2.6 m/s at low tide and 2.2 m/s at high tide, with the highest temperature in the upstream estuary of 27.49oC towards the sea during high tide conditions. The low salinity in the middle of the estuary of 0.99 ppt increases towards the sea with a relatively smaller distribution of salinity at low tide.The mixing type in the Air Manna Estuary is the Salt wedge estuary which has a well-certified mixing pattern, with an estuary number of 0.00019.
Microzonasi Perubahan Garis pantai Akibat Pengaruh Rip Current di Pantai Kota Bani Bengkulu Supiyati, Supiyati; Johan, Septi; Suwarsono, Suwarsono; Putri, Hestyna Eka
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.22262

Abstract

The coastal of Kota Bani in Bengkulu is directly connected to the Indian Ocean, which has strong waves and currents that have the potential for rip currents. Recently, Kota Bani coast has experienced rapid shoreline changes caused by abrasion. Therefore, the purpose of this study is to identify rip current generating parameters, microzonation mapping of shoreline changes and its relationship with the potential zone of rip current occurrence at Kota Bani Coast, Bengkulu. The methods used in this study were in situ measurement of rip current generating parameters and identification of rip current using drone photos and USGS data to see shoreline changes. Analysis was done descriptively and quantitatively. Based on the research results, the type of breaking wave found at Kota Bani Coast is the plunging type with an irribaren value of 0.3 - 2.3. The potential for rip current occurs more in the west season than in the first transitional season. Rip current speeds of 3 m/s in the west season and 2.2 m/s in the first transitional season. Based on photo data of the coastline from the USGS for 10 years, the abrasion zone experienced a total coastline setback of 149.9 meters and in the non-abrasion zone experienced a total coastline increase (sedimentation) of 113.3 meters, with an average per year.  Pantai Kota Bani Bengkulu Utara berhubungan langsung dengan Samudera Hindia yang memiliki gelombang dan arus kuat yang memiliki potensi kemunculan rip current. Akhir-akhir ini Pantai kota Bani mengalami perubahan garis pantai yang sangat cepat yang disebabkan abrasi. Oleh sebab itu tujuan penelitian ini adalah mengidentifikasi parameter pembangkit rip current, pemetaan microzonasi perubahan garis pantai dan  hubungannya dengan zona potensi rip current di Pantai Kota Bani Bengkulu. Metode yang digunakan dalam penelitian ini adalah pengukuran in situ parameter pembangkit rip current dan identifikasi rip current menggunakan foto drone serta data USGS utuk melihat perubahan garis pantai. Analisis dilakukan secara diskriptif dan kuantitatif. Berdasarkan hasil penelitian diperoleh tipe gelombang pecah yang terdapat di Pantai Kota Bani yaitu tipe plunging dengan nilai irribaren 0,3 - 2,3. Potensi kemunculan rip current lebih banyak terjadi pada musim barat dibandingkan musim peralihan I. Kecepatan rip current pada musim barat 3 m/s dan pada musim peralihan I 2,2 m/s. Berdasarkan data foto garis pantai dari USGS selama 10 tahun zona terabrasi terjadi total kemunduran garis pantai 149,9 meter dan pada zona tidak terabrasi mengalami total kemajuan garis pantai (sedimentasi) 113,3 meter, dengan rata-rata perubahan garis pantai per tahun 3,7 m. Zona abrasi dan tidak terabrasi sama-sama berpotensi munculnya rip current, akan tetapi kemunculan rip current lebih banyak pada zona terabrasi, hasil yang didapat menunjukkan bahwa rip current menjadi salah satu faktor mempercepat terjadinya abrasi di Pantai Kota Bani.  
Kajian Perubahan Garis Pantai Kabupaten Bengkulu Utara dengan Interpretasi Citra Penginderaan Jauh dan Digital Shoreline System Septianingsih, Dwi; Amalia, Isra; Johan, Septi; Lidiawati, Liza
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.218-227.2025

Abstract

The coastal area of ​​North Bengkulu often experiences abrasion and accretion processes, considering its location directly facing the vast waters of the Indian Ocean. This phenomenon can have an impact on changes in the coastline in the area. This study aims to identify changes in the coastline over time by utilizing multi-sensor satellite imagery from USGS. The focus is to measure changes in the distance of coastal areas in North Bengkulu Regency. Changes in the coastline in this area are calculated statistically using the Digital Shoreline Analysis System (DSAS). The results of the average calculation of the distance of changes in the coastline from 2014 to 2023 in North Bengkulu Regency are influenced by quite large abrasion and accretion of -20.31 meters and 21.6 meters. The impact of accretion shows a higher value than abrasion due to the addition of land (sedimentation) in a number of river estuaries in North Bengkulu Regency. Changes in the coastline are influenced by the dynamics of seasonal winds and sea waves due to the East and West Monsoons, impacting coastal settlements, infrastructure, and ecosystems such as coral reefs and mangrove forests
Wind Pattern Analysis and Its Impact on Flight Safety at Fatmawati Soekarno Airport Using Wind Rose Method (2019-2023) Agustina, Tari; Rosyid, Muhammad Ilham; Johan, Septi; Norfahmi, Siti Hairunnisa; Lizalidiawati, Lizalidiawati
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 1 (2025): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i1.8465

Abstract

A study of wind patterns was conducted to minimize aircraft accidents at Fatmawati Soekarno Airport, Bengkulu City. The data was then processed using the Wrplot application to show the direction and difference in wind speed and create a wind pattern image in the form of a wind rose diagram. This study aims to analyze wind patterns and speeds at Fatmawati Soekarno Airport, Bengkulu City for a period of 5 years (2019-2023) using the Wind Rose method. Data obtained from the Meteorology, Climatology, and Geophysics Agency, Fatmawati Bengkulu Meteorology Station shows that the dominant wind direction comes from the Southeast, Northeast, and North which are influenced by seasonal changes. The results of the analysis show extreme wind speeds ranging from 2.50 - 4.70 m / s which are classified as light winds and are still safe for flight operations. With a deep understanding of this wind pattern, it is hoped that airport managers can optimize the use of runways and improve flight safety by accommodating weather conditions. The results of this study also emphasize the importance of consistent wind pattern monitoring to support risk management related to extreme weather.
Analysis of Rainfall Distribution and Climate Classification in Response to Flood Events in Lebong Regency, Indonesia Limbong, Rospita Naomi; Anwar, Anang; Johan, Septi; Lizalidiawati, Lizalidiawati
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 1 (2025): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i1.8740

Abstract

This study aims to analyze the distribution and time series of rainfall in Lebong Regency, using a case study of the flood event on April 16, 2024, and to analyze the condition of climate change in Lebong Regency from 2014 to 2024. This research uses daily rainfall data to examine flood events and monthly data over 11 years from 2014 to 2024 for climate classification analysis with 10 rainfall observation stations using the Schmidt-Ferguson method. The results of the data processing were analyzed using descriptive and quantitative methods. Based on the research results, it was found that the distribution of rainfall before, during, and after the flood event experienced a significant change. Before the incident, the lowest rainfall in Lebong Regency was recorded at the Bungin, Gunung Alam, Rimbo Pengadang, and Semelako Atas Stations with a value of 0 mm/day (no rain). Rainfall increased on the day of the flood in several sub-districts, with the highest recorded at the Lemeu Station in Uram Jaya sub-district, reaching 101 mm/day. Meanwhile, after the day of the flood, the rainfall was 12 mm/day. Meanwhile, the climate classification based on the Schmidt-Ferguson method shows that the rainfall in Lebong Regency falls into the wet to very wet climate category. The very wet climate category in Lebong Regency is represented by the Bungin station, with rainfall amounting to 1166 mm/month in January 2020. Based on the 11-year average data, the highest rainfall occurs in November, amounting to 537.58 mm/year. The study also contributes to understanding local flood risk based on long-term rainfall classification, which has rarely been explored in the Bengkulu region.
Identification of Seawater Quality Around PLTU Teluk Sepang Outlet Based on Oceanographic Parameters Gerry, Muamar; Silaban, Angeli; Johan, Septi; Lidiawati, Liza
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 2 (2025): 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.v69i2.533

Abstract

The heat waste produced by the PLTU is released directly into the ocean, significantly impacting the quality of sea water. This research intends to assess the quality of sea water near the PLTU Teluk Sepang outlet in Bengkulu City using oceanographic parameters. Data collection was conducted in the field at eight sites that represent the area around the PLTU outlet, focusing on parameters such as sea water temperature, salinity, density, pH, and ocean currents. The obtained measurement results were then compared against the standards set by KepMenLH No. 51, 2004. The findings reveal that parameters such as temperature, pH, and salinity did not meet the quality standards necessary for marine biota ecosystems; the average temperature ranges from 33.58 to 35.39 °C, the pH levels were between 8.59 and 8.76, indicating an alkaline condition, and salinity measures between 24.7 and 26.9 ‰, all of which fall below the standards established by KepMenLH No. 51, 2004. This research demonstrates that the discharge of heat waste substantially pollutes the sea water quality around the PLTU Teluk Sepang outlet in Bengkulu City, particularly affecting sea water temperature, which significantly influences the metabolism of marine biota.
Analisis Pengaruh Tekanan Udara, Kelembaban, dan Suhu Udara terhadap Curah Hujan di Kota Bengkulu selama El Niño 2023 Wahyuni, Ani Sri; Edkayasa, Mardho Tillah; Johan, Septi; Norfahmi, Siti Hairunnisa; Lizalidiawati, Lizalidiawati
Jurnal Kelautan Vol 18, No 2: Agustus (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i2.29965

Abstract

ABSTRAKFenomena El Niño sangat memengaruhi dinamika atmosfer, meliputi variabel seperti tekanan udara, kelembaban, dan suhu, sehingga memengaruhi pola presipitasi di Kota Bengkulu. Penelitian ini bertujuan untuk mengetahui hubungan antara tekanan udara, kelembaban udara, dan suhu udara terhadap pola curah hujan dari tahun 2019 hingga 2023, dengan fokus pada fenomena El Niño yang terjadi pada tahun 2023. Data diperoleh dari Stasiun Klimatologi Bengkulu dan Stasiun Meteorologi Fatmawati Soekarno, serta data Oceanic Niño Index (ONI) dari NOAA. Penelitian ini menggunakan metodologi deskriptif dan analisis regresi linier berganda, yang dilakukan dengan menggunakan Microsoft Excel. Hasil penelitian menunjukkan bahwa terdapat korelasi yang signifikan antara suhu udara, tekanan udara, dan kelembaban udara di Stasiun Klimatologi, dengan koefisien korelasi sebesar 0,54. Sebaliknya, parameter cuaca di Stasiun Meteorologi memiliki koefisien korelasi yang lebih rendah, yaitu 0,42. Hasil ini menyatakan bahwa adanya varians dalam hubungan antara variabel meteorologi tersebut di berbagai lokasi pengamatan. Hal ini mengonfirmasi bahwa El Niño menyebabkan penurunan curah hujan akibat meningkatnya suhu dan tekanan udara, serta berkurangnya kelembaban. Penelitian ini berpotensi menyediakan kerangka dasar untuk mengurangi dampak buruk kekeringan akibat perubahan iklim di wilayah Kota Bengkulu.Kata Kunci : Suhu Udara, Kelembaban, Tekanan, Curah Hujan, El Nino.ABSTRACTThe El Niño phenomenon significantly influences atmospheric dynamics, including factors like as air pressure, humidity, and temperature, hence impacting precipitation patterns in Bengkulu City. This study seeks to ascertain the correlation between air pressure, humidity, and temperature concerning rainfall patterns from 2019 to 2023, emphasising the El Niño phenomena of 2023. Data were acquired from the Bengkulu Climatology Station, the Fatmawati Soekarno Meteorology Station, and the Oceanic Niño Index (ONI) data provided by NOAA. This research employed a descriptive methodology and multiple linear regression analysis conducted via Microsoft Excel. The findings indicated a substantial association among air temperature, air pressure, and air humidity at the Climatology Station, with a correlation coefficient of 0.54. The Meteorology Station exhibited a lower correlation coefficient of 0.42 for the identical parameters. The results demonstrate variability in the correlation among these meteorological variables across different observation sites. The results indicate that El Niño leads to less precipitation owing to elevated temperature and air pressure, together with diminished humidity. This research may establish a foundational paradigm for alleviating the detrimental effects of climate change-induced droughts in coastal regions.Keywords: Air Temperature, Humidity, Pressure, Rainfall, El Nino.
Effect of Air Humidity, Wind Speed and Sea Surface Temperature on Rainfall in Bengkulu City Gita Rahma Sari; Johan, Septi; Supiyati; Anwar, Anang
Maritime Park: Journal of Maritime Technology and Society Volume 4, Issue 3, 2025
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.vi.45549

Abstract

Rainfall is a vital climate component and its variability in equatorial regions such as Indonesia. Bengkulu City, with its strategic geographical position on the edge of the Indian Ocean, is influenced by global and regional climate, as well as local conditions such as topography and sea surface temperature. Air humidity is known to be significantly correlated with extreme rainfall, while wind speed plays a role in air convergence and cloud formation. Therefore, this research tends to examine the air humidity, wind speed and sea surface temperature’s influence on rainfall in Bengkulu City. The method employed in this research is quantitative technique with multiple linear regression analysis using SPSS model. The data employed are monthly data of air humidity, wind speed, sea surface temperature, and rainfall from 2003 to 2023. As model validation before regression analysis, normality and multicollinearity tests were conducted. The analysis outcomes present that air humidity has a significant and positive partial effect on rainfall, which is consistent with its role in the condensation process and cloud formation. In contrast, wind speed and sea surface temperature show no significant partial influence on rainfall. However, simultaneously, these three independent variables (air humidity, wind speed and sea surface temperature) have a significant effect on rainfall. The regression model was able to explain about 63.8% of the variation in rainfall, confirming that air humidity is the main predictor of rainfall in the Bengkulu region.
Co-Authors Agustina, Tari Amalia, Isra Anwar, Anang Dari, Evita Sri Wulan Devi Permata Sari Devicawati, Devicawati Edkayasa, Mardho Tillah Eko Risdianto Gerry, Muamar Gita Rahma Sari Henny Johan Limbong, Rospita Naomi Lizalidiawati Lizalidiawati Norfahmi, Siti Hairunnisa Putri, Desy Hanisa Putri, Hestyna Eka Riska Ekawita Rosyid, Muhammad Ilham Septianingsih, Dwi Silaban, Angeli Sudirman Sudirman Supiyati . Suwarsono Suwarsono Umaya Umaya, Umaya Wahyuni, Ani Sri Widiasih, Widiasih