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All Journal Teknotan: Jurnal Industri Teknologi Pertanian Jurnal Ilmu Dasar Jurnal Penelitian Fisika dan Aplikasinya (JPFA) BERKALA SAINSTEK Natural B Jurnal Fisika Unand GEA, Jurnal Pendidikan Geografi UNEJ e-Proceeding R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Fisika FLUX Sistemasi: Jurnal Sistem Informasi Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Spektra: Jurnal Fisika dan Aplikasinya International Journal of Remote Sensing and Earth Sciences (IJReSES) STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Jurnal Teori dan Aplikasi Fisika Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Pillar of Physics: Jurnal Berkala Ilmiah Fisika InSTEM Geosfera Indonesia The International Journal of Remote Sensing and Earth Sciences (IJReSES)
Bowo Eko Cahyono
Physics Department, Faculty Of Mathematics And Natural Sciences, University Of Jember, Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Journal : indonesian journal of applied physics

 1 
Karakteristik Sensor Kapasitif Pelat Sejajar Dalam Aplikasinya Sebagai Instrumen Pengukur Curah Hujan Berbasis Arduino Uno Bowo Eko Cahyono; Supriyadi Supriyadi; Muhammad Ainur Rofiq
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.14248

Abstract

Penelitian ini bertujuan untuk mempelajari karakteristik dari kapasitor pelat sejajar sebagai sensor dalam alat ukur curah hujan berbasis Arduino dengan tampilan LCD. Alat ini mampu membaca dan menampilan tegangan keluaran, nilai kapasitansi, konstanta dielektrik dan tinggi level curah hujan akibat adanya perubahan komposisi bahan dielektrik di antara pelat kapasitor. Sistem yang didesain telah diuji dalam 3 tahapan yaitu, uji akurasi pembacaan nilai kapasitansi, nilai ketinggian air, dan pengujian di lapangan. Nilai-nilai kapasitansi sensor yang ditampilkan dalam LCD dibandingkan dengan nilai kapasitansi sensor yang diukur dengan menggunkan kapasitansi meter CM-3300A. Dalam pengujian ini didapatkan hasil bahwa nilai-nilai kapasitansi yang diukur dengan dua etode yang berbeda tersebut saling berdekatan. Selisih tertinggi adalah 20,97pF pada ketinggian 15cm. Tinggi level air yang terbaca dibandingkan dengan pembacaan menggunakan penggaris dan hasilnya menunjukkan bahwa selisih terkecil yaitu 0,19 mm dan selisih terbesar 4,93 mm. Selanjutnya berdasarkan pengujian langsung di lapangan didapatkan selisih yang tidak terlalu jauh, dengan rata-rata selisih yang diperoleh kurang dari 5 mm. Secara umum, sistem alat ukur curah hujan telah menunjukkan kinerja yang bagus  saat dilakukan pengujian dan diaplikasikan pada kondisi hujan secara langsung di lapangan. Hasil tersebut telah menunjukkan bahwa sistem alat ukur curh hujan telah sesuai dengan apa yang diharapkan.
Pemanfaatan Citra Landsat 8 untuk Pemetaan Potensi Mineralisasi Emas di Kabupaten Tapanuli Selatan, Sumatera Utara Shofitri Zuhannisa'; Bowo Eko Cahyono; Nurul Priyantari
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.089 KB) | DOI: 10.13057/ijap.v9i01.25478

Abstract

Kabupaten Tapanuli Selatan secara geologi merupakan daerah vulkanik tua dan disertai dengan adanya sesar yang mengindikasikan adanya batuan teralterasi hidrotermal yang dapat menjadi salah satu indikator potensi keberadaan logam salah satunya emas. Secara geologi, emas merupakan mineral logam yang berkaitan erat dengan proses magmatik dan lingkungan pembentukannya berada di dalam batuan vulkanik. Kegiatan eksplorasi emas saat ini banyak dilakukan dengan metode pemetaan lapang, akan tetapi metode tersebut mempunyai kendala dimana memerlukan biaya, energi, dan waktu yang relatif tinggi. Oleh karena itu, diperlukan metode untuk memudahkan eksplorasi emas salah satunya dengan penginderaan jauh. Tujuan dari penelitian ini adalah melakukan pemetaan serta pengukuran luasan potensi mineralisasi emas di Kabupaten Tapanuli Selatan dengan cara mengetahui zona alterasi hidrotermal dengan menggunakan metode penisbahan saluran (band ratios) dan lineament (kelurusan) yang ada di lokasi penelitian. Hasil penelitian ini diperoleh potensi mineralisai emas tersebar di tujuh kecamatan, yakni di Kecamatan Batang Toru, Angkola Sangkunur, Sipirok, Angkola Timur, Aekbilah, Batang Angkola, dan Sayurmatinggi. Pengukuran luasan wilayah potensi mineralisasi emas dilakukan dengan membuat polygon area. Berdasarkan luasan total di setiap kecamatannya, diperoleh kesimpulan bahwa potensi mineralisasi emas di Kabupaten Tapanuli Selatan yang paling luas terdapat di Kecamatan Batang Toru, yang juga ditunjukkan dengan adanya aktivitas pertambangan emas resmi yang beroperasi di wilayah Batang Toru.
Analisis Produktivitas Padi berdasarkan Indeks Kekeringan (NDWI dan NDDI) Lahan Sawah menggunakan Data Citra Sentinel-2A di Kecamatan Ambulu Bowo Eko Cahyono; Rahmadin Rahagian; Agung Thahjo Nugroho
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 1 (2023): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i1.70682

Abstract

Rice is almost a staple food source for the world's population. The State of Indonesia contributes the largest amount of rice productivity, especially in the province of East Java. Ambulu District is part of the province of East Java, which has experienced a decline in rice productivity. The decline in rice productivity is thought to be the result of agricultural land drought. The purpose of this study was to determine the correlation value of the drought index (NDWI and NDDI) with rice productivity. This research was conducted using remote sensing methods using the Sentinel-2A satellite from 2016 to 2020 during the rainy season. Sentinel-2A satellite data is in the form of images, which are then cropped and digitized on agricultural land. Furthermore, the data was processed using Arcgis Software to obtain NDWI (Normalized Defense Water Index) and NDDI (Normalized Defense Drought Index) values as land dryness parameters, which were classified into 5 classes. The correlation results of the NDWI value on rice productivity have a directly proportional relationship with an effect of 61.96% and 38.04% influenced by other factors. The results of the correlation of NDDI values on rice productivity have an inverse relationship with an effect of 68.68% and 31.32% influenced by other factors
Numerical Tsunami Hazard Modelling in the Pancer Coast - Puger, East Java, Indonesia Rozikan Rozikan; Agus Suprianto; Muhammad Aryono Adhi; Bowo Eko Cahyono
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 16, No 1 (2026): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v16i1.114864

Abstract

The southern Java subduction zone is one of the major tsunami hazard sources in Indonesia due to its potential to generate large megathrust earthquakes. This study evaluates tsunami hazards from a Mw 8.7 megathrust earthquake worst-case scenario using numerical modeling with COMCOT v1.7. A five-layer nested grid system is applied to simulate tsunami generation, propagation, and inundation from the Indian Ocean to the Pancer - Puger coast, Jember Regency, Indonesia. Earthquake source parameters are defined using the Wells and Coppersmith empirical relationships, while initial seafloor deformation is calculated using the Okada elastic dislocation model. Tsunami wave dynamics are analyzed using Virtual Tsunami Gauges (VTGs). The results indicate that Puger Kulon and Mojosari villages experience the most severe impacts, with large wave amplitudes, strong currents, and inundation exceeding 20 m depths. Tsunami arrival time is about 21 to 27 minutes, providing a very limited evacuation window. The ETH (Estimated Tsunami Height) and ETA (Estimated Time of Arrival) maps show that low-lying, open coastal plains act as primary pathways for tsunami penetration. These findings emphasize the high vulnerability of the Pancer coast - Puger and the need for risk-based mitigation, improved evacuation planning, and strengthened local early warning systems.
Assessment of Settlement Area Development in Jember Regency Area Based on Multitemporal LANDSAT 8 OLI-TIRS Data Bowo Eko Cahyono; Inas Alfiyatul Umniyah
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 15, No 1 (2025): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v15i1.97656

Abstract

Jember is a regency in the province of East Java-Indonesia, experiencing residential or settlement area growth because of increasing population as the main trigger for land use changing. Monitoring the development of settlement areas is important for regional and urban planning. Remote sensing technology provides fast and efective methods of classifying land use and land cover for regional aea, so monitoring the development of settelemnent area can be identified easily. This study aims to determine the classification of land use and analyse the distribution or evelopment of settlement area in the Jember District based on LANDSAT 8 OLI-TIRS data for the year of 2013, 2015, 2017, 2019 and 2021. The classification was conducted by supervised classification method using a random forest algorithm. The land use is divided into six classes namely vegetation, water body, settlement, bush grass, open land and paddy field. The results showed that settlement area continues to increase every year, meanwhile the area of vegetation, water bodies, bush grass, open land and paddy fields varies every year. The distribution of settlement area in each sub-district showed that the largest area of settlements occur in Ambulu sub-district with 1,447 ha in 2013, 4,064 ha in 2019, and 3,215 ha in 2021. The other years that are 2015 and 2017, Wuluhan sub-district was detected as the largest area of settlement which are 2,950 ha in 2015 and 2,291 ha in 2017. However, this number of settlement area distribution does not really reflect the level of housing density in each sub-district. Thus, the housing density was calcuated by dividing the settlement area to the sub-district area. It found that the highest settlement density in 2021 is located in Kaliwates sub-district with a percentage of 48%, followed by Sumbersari at 44%, Balung at 31%, Ambulu at 30%, and Umbulsari at 29%.
Analysis of Vegetation Index Values and Sugar Content in Sugarcane Based on Planting Age using Sentinel-2 Satellite Data Inas Alfiyatul Umniyah; Bowo Eko Cahyono; Agus Suprianto; Farid Lukman Hakim
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 15, No 2 (2025): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v15i2.106287

Abstract

This study the relationship between the age of sugarcane plants (Saccharum officinarum L.), vegetation indices, and sugar content using Sentinel-2 satellite imagery in Jember Regency. Vegetation indices such as NDVI, GNDVI, NDRE, and NDII were used to monitor the physiological condition of the plants, while sugar content was measured using a refractometer on the upper, middle, and lower sections of the sugarcane stalks. The results indicate that the highest sugar content was found in the lower stalk section, as this area serves as the primary storage site for sucrose. There is relationship that increasing plant age correlates with changes in vegetation index patterns, peaking during the maximum vegetative phase. These findings offer significant insights into technology-based sugarcane land management, supporting the optimization of harvest timing, irrigation, and fertilization.
Co-Authors Agung Thahjo Nugroho Agung Tjahjo Nugroho Agus Subekti Agus Subekti Agus Suprianto Agus Tjahjo Nugroho Ahmad, Mutiara Garnet Artoto Arkundato Asih Sumarlin Chatarina Umbul Wahyuni Darmawan, Sukma Adi Ervin Budi Febriawan Farid Lukman Hakim Fauziah, Helmi Frahma, Yazella Feni Helmi Fauziah Holili Nur Arivah Husen, Jamal Icha Wulan Maulinida Ina Dwi Utami Inas Alfiyatul Umniyah Inas Alfiyatul Umniyah Indarto Indarto Indarto Indarto Irvan Siswanto Jamal Husen Katsunoshin Nishi Linggar Ayu Octaviani Lutfi Rohman Mandala, Marga Misto Misto Misto Mochamad Tanwiruz Zaman Muhammad Ainur Rofiq Muhammad Aryono Adhi Muhammad Syukron Ali Mukarromah, Luluk Mutiara Garnet R.A Niken Dwi Wulandari Noer Rimafatin Novia Puji Lestari Nur Shabrina Oktaviany Nurfaizatul Jannah Nursulistyono, Yuda Nurul Priyantari Nurwijayanti Octaviani, Linggar Ayu Permatasari, Yossika Dwi Putri Tunjung Sari Putri, Ervina Ikke Septiyas R Rofiatun Rahmadin Rahagian Rizky Mauli Diyah Rofiatun Rofiatun Rofiatun, R Rozikan Rozikan Sari, Putri Tunjung Sa’adah, Nurul Shofitri Zuhannisa' Siswanto Siswanto Siswanto Sri Indariyatul Masruroh Sudarmadi Sudarmadi Supriyadi Supriyadi Supriyadi Sutisna Sutisna Tri Mulyono Triatmojo, Muhammad Ikbal Nur Dian Umniyah, Inas Alfiyatul Wafi, Moh. Abduh Widiasih, Widiasih Winda Arif Febrayanti Yazella Feni Frahma Yazella Feni Frahma Yustisi Wulandari