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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 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)

Cahyono, Bowo Eko

Jurusan Fisika Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Jember

Author-ID : 2853421

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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UTILIZATION OF TOFU LIQUID WASTE WITH CERAMIC-BASED MICROBIAL FUEL CELL (MFC) TECHNOLOGY Tri Mulyono; Siswanto Siswanto; Misto Misto; Mutiara Garnet R.A; Bowo Eko Cahyono
UNEJ e-Proceeding 2022: E-Prosiding Kolokium Hasil Penelitian dan Pengabdian kepada Masyarakat
Publisher : UPT Penerbitan Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

The purpose of this study was to determine the effect of adding variations in substrate concentration and the effect of variations in the surface area of the electrodes (anode and cathode) on the power density, resulting in a maximum power density value for a period of 13 days. measurement. The first step is measuring voltage and current with substrate concentration without dilution process, then variation of concentration is carried out with 10 times, 8 times, 5 times, 4 times, and 2 times dilutions on ceramics with a diameter of 8 cm. . The second step is to measure the voltage and current by varying the surface area of the electrodes (cathode and anode). The measurement results showed that the maximum power density value obtained was 188.23 mW/m2 without a dilution process, namely with a concentration of 3640 ppm for the 3rd day. While the results of the measurement of the variation of the electrode surface area obtained a maximum power density value of 205.88 mW/m2 on the electrode surface area of 3.57 m2 for the third day. The more surface area of the electrode given at the time of measurement, the more bacteria that are in contact with the electrode, causing the value of the resulting power density to be greater.Keywords: waste tofu, microbial fuel cell (MFC), power density, electrode, ceramic

Klasifikasi Down Syndrome Menggunakan Tekstur LBP dengan Tiga Variasi Distance Classifiers Agung Tjahjo Nugroho; Yustisi Wulandari; Bowo Eko Cahyono
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 7, No 1 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/string.v7i1.13532

Down syndrome is the most easily identified and most common genetic disorder. Down syndrome variation of trisomy 21 has characteristics that are common to people with Down syndrome. But, children with this Down syndrome variation have slight differences in the mouth and appearance because they tend to have similar oral features with their parents and siblings so that distinguishing them is quite complex. Therefore, it is important to know in more details the special characteristics of children with Down syndrome. This study aims to create an innovative image processing-based system so that it is more practical to classify people with down syndrome and normal people. The method that can be used is the Local Binary Pattern (LBP) method. This study used 2400 mouth frames of children with Down syndrome and normal children for data training. Then, it also uses 3600 mouth frames for children with Down syndrome and normal children for testing data. The results obtained are the threshold value which gives a good classification of 0.1-0.2 for the three variations of the distance calculation method. The Euclidean and Chebychev methods have an accuracy quality of 100% while the City block method at the threshold of 0.1-0.2 has an accuracy of 91.6. So, it can be said that the most accurate method in this research is the Chebychev, Euclidean, then City Block method.

Analysis of Caffeine Content in Roasting Temperature Variation of Robusta Luwak Coffee from Garahan Jember Plantation using UV-Vis Spectrophotometry Method Bowo Eko Cahyono; Winda Arif Febrayanti; Misto Misto
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 19, No 3 (2022): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

ABSTRACT- The increasing demand for high-quality coffee has led to making various tests to guarantee the quality of coffee to be accepted in the market. This study aimed to know the caffeine content in Robusta Luwak coffee roasted at different temperatures. The coffee used in this study is pure and mixed with rice. This study was conducted using various roasting temperatures, namely 190⁰C and 240⁰C. The additional material combined with the coffee is rice with mass fractions of 10%, 20%, 30%, 40%, and 50%. The absorbance value of caffeine in the sample is measured in the wavelength of the maximum absorbance of pure caffeine solution, 273 nm. The results showed that pure Robusta Luwak coffee with roasting temperatures of 190⁰C and 240⁰C had caffeine content of 1.10% and 0.94%, respectively. In mixed Robusta Luwak coffee, the highest caffeine content was at 190⁰C with a caffeine content of 0.89% in the composite material mass fraction of 10%, and the lowest caffeine content was at 240˚C with a mass fraction of 50% mixed material that had a caffeine content of 0.31%. In the serving dose, those two samples showed that the caffeine content was laid in the safe interval according to SNI and FDA standards.KEYWORDS: caffeine; robusta Luwak coffee; temperature; wavelength.

Analisis Usia Tebu Terhadap Pola Nilai GNDVI (Green Normalized Difference Vegetation Index) Berdasarkan Data Citra Landsat-8 Bowo Eko Cahyono; Agung Tjahjo Nugroho; Niken Dwi Wulandari
Teknotan: Jurnal Industri Teknologi Pertanian Vol 16, No 3 (2022): TEKNOTAN, Desember 2022
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol16n3.2

Tebu adalah salah satu tanaman yang dapat memproduksi gula serta bioenergi bagi lingkungan yang masa tanamnya selama ±12 bulan. Kondisi pertumbuhan tanaman tebu berdasarkan usia tanamnya dapat dipantau dengan menggunakan teknologi penginderaan jauh. Penelitian ini bertujuan untuk mengetahui pola reflektansi spektra yang dinyatakan melalui indeks vegetasi GNDVI. Penelitian ini menghubungkan nilai GNDVI terhadap usia tanaman tebu dengan menggunakan data citra Landsat 8 tahun 2019-2020 di Kabupaten Jember yang terbagi menjadi 11 lokasi lahan. Tahap awal yang dilakukan yaitu mengumpulkan data citra lalu dikoreksi radiometrik ToA. Selanjutnya menghitung nilai GNDVI pada lokasi lahan tebu yang ditinjau. Nilai GNDVI dari setiap lokasi lahan ini dihitung nilai mediannya dan dibuat grafik hubungan antara nilai GNDVI terhadap usia tanam tebu. Dari hasil penelitian didapatkan pola nilai GNDVI terhadap usia tebu berbentuk kurva parabolik. Hasil dari pola tersebut menunjukkan bahwa nilai GNDVI berada pada maksimum di usia sekitar 8, 9, dan 10, dimana nilai GNDVInya dalam rentang 0.43 sampai 0.54. Secara rata-rata hubungan usia tebu dengan nilai GNDVI dinyatakan dengan persamaan dimana X dan Y berturut-turut adalah usia tebu dan nilai GNDVI dengan puncak nilai GNDVI berada pada bulan ke 9. Secara umum dapat dikatakan bahwa semakin besar usia tebu maka semakin besar nilai GNDVI hingga pada keadaan maksimum dan kembali menurun.

Klasifikasi Jenis Biji Kopi dengan Menggunakan Metode Gray Level Co-occurrence Matrix (GLCM) Bowo Eko Cahyono; Agus Tjahjo Nugroho; Icha Wulan Maulinida
Teknotan: Jurnal Industri Teknologi Pertanian Vol 16, No 3 (2022): TEKNOTAN, Desember 2022
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol16n3.9

Kopi merupakan salah satu tanaman perkebunan yang menjadi sumber penghasilan rakyat dan juga dapat menjadi sumber peningkat devisa negara melalui ekspor biji kopi mentah maupun olahan dari biji kopi. Kopi dapat dibedakan berdasarkan jenisnya yaitu Kopi Robusta dan Kopi Arabika. Setiap varietas kopi memiliki harga yang berbeda-beda tergantung dari jenis varietasnya. Tidak semua petani, dan pemilik coffee shop mampu mengenali varietas kopi dengan hanya melihat green bean dan roasting. Hal tersebut dapat diatasi dengan pemodelan yang dapat mengidentifikasi varietas Kopi Robusta dan Arabika agar dapat digunakan sebagai second opinion untuk mengidentifikasi varietas kopi robusta dan arabika. Salah satu metode yang dapat digunakan adalah metode pencitraan. Tujuan dari penelitian ini adalah untuk mengetahui akurasi mengklasifikasikan jenis biji kopi dengan menggunakan metode Gray Level Co-occurrence Matrix (GLCM). Pada penelitian ini bahan utama yang digunakan adalah biji kopi jenis Robusta Tanggul dan Raung, serta Arabika Ijen dan Bali yang telah di sangrai. tingkat kematangan sangrai biji kopi yang digunakan pada penelitian ini adalah coklat muda (light roast) untuk jenis Arabika dan medium roast untuk jenis robusta. Hasil yang diperoleh dari akurasi klasifikasi jenis biji kopi dengan menggunakan metode GLCM sebesar 99% untuk klasifikasi tipe kernel atau powder, 93% untuk klasifikasi jenis Robusta atau Arabika, dan 56% untuk klasifikasi daerah asal yaitu (Tanggul, Raung, Ijen, dan Bali) dengan citra data uji sebanyak 80 citra.

Effect of Corrosive Liquid Lead Coolant on the Structural Stability of Iron Material Sudarmadi, Sudarmadi; Sutisna, Sutisna; Cahyono, Bowo Eko; Widiasih, Widiasih
Computational And Experimental Research In Materials And Renewable Energy Vol 5 No 1 (2022): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v5i1.31479

For the design of fast nuclear reactors, usually it use the lead metal alloys for coolant materials. Researches about lead coolants, has been carried out experimentally. However, experimental studies in the nuclear material field, besides being expensive, usually also require high safety. In particular, research on the corrosive properties of liquid lead for structural materials requires serious treatment if carried out experimentally. In this case, the computational method is very helpful to overcome these obstacles. In our research we use the molecular dynamics simulation method to know the effect of temperatures and effect of liquid lead corrosion attack to iron material. We want to know that which one is most crucial that causing the damage of the materials: it is due to temperature or due to liquid lead attack. It has been observed from MSD curves of simulation results that the liquid lead can make iron material experiencing most damage if compared with temperature effect The interactions among atoms are described by the Lennard-Jonnes interaction potential. The simulations was run and supported using Moldy and Ovito software.Keywords: Corrosion of molten lead, fast nuclear reactor, molecular dynamics simulation, Moldy, MSD, Ovito.

Emprowering The PKK Team in Pecoro Village, Rambipuji, Jember, Through The Production of Organic Fertilizer From Household Waste. Supriyadi; Bowo Eko Cahyono; Agus Subekti; Siswanto
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 1 No. 1 (2023): Mei
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v1i1.349

The empowerment PKK team in Pecoro Village, Rambipui District, Jember Regency has been carried out through organik fertilizer from household waste. The purpose of this activity is to empower PKK women to use household waste into products that can be used. The activity is carried out through lecture / counseling activities, mentoring and the practice of processing organik waste into compost. As a result, the level of awareness of PKK mothers and the community about waste management has increased, and is able to add additional cash and income.

Electric Power Analysis and System Optimization of Micro-Hydro Power Plants at the Sentool Plantation, Jember Irvan Siswanto; Artoto Arkundato; Lutfi Rohman; Bowo Eko Cahyono
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 1 No. 1 (2023): Mei
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v1i1.360

Sentool Plantation is a plantation area, agro-industrial and agro-tourism are located in Suci Village, Panti District, Jember Regency. This area is at the foot of Mount Argopuro with abundant water sources. In this area there is a river flow that can be utilized as a micro-hydro power plant (PLTMH). PLTMH is a relatively easy power plant to make and apply in rural areas or villages. PLTMH was chosen as an alternative energy source with the principle of developing renewable energy Therefore, in this community service activity want to effort to analyze potency of electric power generation and optimization of the MHP System at the Sentool Plantation which is useful as a consideration PLTMH development to meet the electricity needs of the local community and electricity needs for the development of agro-tourism. Power potential analysis process and optimization of the PLTMH system is carried out with two stages of data analysis, namely the calculation of the potential power theoretical and simulation using HOMER Energy software. HOMER Energy is used for profit simulation. The greatest potency generated power is 53.12 kWh with a discharge of 0.398 m3/s and the smallest is 18.05 kWh with a discharge of 0.135 m3/s. Simulations using HOMER Energy software produce system configurations PLTMH with an estimated capital cost of IDR 48,600,000, operational costs and maintenance 42,900,000 per year, NPC of IDR -2,557,215,000, LCoE of IDR-573.63. PLTMH has a capacity of 37.1 kW with annual production of 290,573 kW, get a profit of IDR 212,747,987.50 from the sale of energy. The results of the calculation of the water discharge, the height of the water fall and the generated power are quite high, the water flow in the Sentool Plantation is technically feasible to build a micro-hydro power plant (PLTMH).

Determination of Sucrose Content in Sugarcane Liquids Through Angular Dispersion Angle Measurement Misto, M.; Mulyono, Tri; Cahyono, Bowo Eko
Jurnal ILMU DASAR Vol 20 No 2 (2019)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

In the sugar industry, it is important to measure the sucrose content of sugar cane so that an electronic system is needed for measurement. The system was employed an array photodiode as a sensor, red and green laser, operational amplifiers (opamp), an analog to digital converter from Arduino, and a computer. The main operation of the measurement system was conducted by the sensor and controller system in the computer. The controller was programmed with Basic program, a program that suitable for the device. The signal from array photodiode sensor is send to signal processing unit (opamp) and converted to digital signal by ADC. Then the digital code is countered by controller and displayed by monitor computer. Keywords: sugar content, array photodiode, Arduino.

Flooded Area Mapping and Its Relationship to the Land Use, Soil Type, and Rainfall in North Konawe Regency Cahyono, Bowo Eko; Putri, Ervina Ikke Septiyas; Nugroho, Agung Tjahjo
Jurnal ILMU DASAR Vol 23 No 2 (2022)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v23i2.23898

The flood incident in North Konawe Regency, Southeast Sulawesi that occurred on June 2nd, 2019 was the largest flood disaster in that area since the last 42 years, so it is interesting to study. As part of disaster risk management, it is necessary to do flood mapping to determine the distribution of flooded areas and identify areas that have potential for flooding. Mapping of flood inundation areas was carried out using Sentinel-1 data. Land use, rainfall and soil types are used as an analysis of their were relationship to the distribution of flood. The distribution of flood based on the identification of the presence of inundation covered 3 sub-districts, namely Oheo District, Asera District and Andowia District. Correlation of flood distribution to the land use, rainfall and soil type was identified using Pearson correlation value (r). The correlation between flood distribution and land use was -0.59 that indicates the correlation is moderate. Moreover, the correlation of flood distribution to the rainfall was 0 which means the correlation was very weak, and lastly, the correlation value of the flood distribution with soil type was 0.88 or the correlation was very strong.

Co-Authors Agung Tjahjo Nugroho Agus Subekti Agus Subekti Agus Suprianto Agus Tjahjo Nugroho Ahmad, Mutiara Garnet Artoto Arkundato Aryono Adhi, Aryono Asih Sumarlin Chatarina Umbul Wahyuni Darmawan, Sukma Adi Ervin Budi Febriawan Fauziah, Helmi Frahma, Yazella Feni Hakim, Farid Lukman Helmi Fauziah Holili Nur Arivah Husen, Jamal Icha Wulan Maulinida Ina Dwi Utami Indarto Indarto Irvan Siswanto Jamal Husen Katsunoshin Nishi Linggar Ayu Octaviani Lutfi Rohman Mandala, Marga Misto Misto Misto Misto Misto Misto Misto, M Misto, M. Muhammad Ainur Rofiq Muhammad Syukron Ali Mukarromah, Luluk Mutiara Garnet R.A Mutmainnah Mutmainnah 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 Rizky Mauli Diyah Rofiatun Rofiatun Rofiatun, R Rozikan, Rozikan 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

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