Article Per Year (5 Year)
p-Index From 2021 - 2026
1.431
P-Index
This Author published in this journals
All Journal Jurnal Ilmiah Giga JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JMM (Jurnal Masyarakat Mandiri) JUKI : Jurnal Komputer dan Informatika Journal of Petroleum and Geothermal Technology
Hartoyo, Puji
Unknown Affiliation
Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Physics Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Evaluasi Size Specific Dose Estimate Berdasarkan Diameter Efektif (SSDEDE) Pemeriksaan Abdomen di DKI Jakarta Sari, Ni Larasati Kartika; Wonga, Hiasintus; Hartoyo, Puji; Anita, Febria; Repi, Viktor Vekky Ronald; Muliyati, Dewi
Jurnal Ilmiah Giga Vol. 26 No. 2 (2023): Volume 26 Edisi 2 Tahun 2023
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v26i2.2865

Abstract

CTDIvol merupakan salah satu besarab dosis CT Scan yang dihitung berdasarkan fantom dengan diameter 16 cm atau 32 cm sehingga belum mewakili dosis pasien secarra akurat. Size-Specific Doses Estimate (SSDE) merupakan parameter dosis pasien CT Scan yang memasukkan unsur ukuran tubuh pasien yaitu DE (Diameter Efektif). Penelitian ini bertujuan untuk melaporkan nilai SSDEDE dan CTDIvol pada pemersiksaan abdomen di DKI Jakarta dan kolerasi SSDEDE dan CTDIvol. Penelitian ini dilakukan pada lima rumah sakit di DKI Jakarta, dimana sampel 20 pasien pemeriksaan CT Scan abdomen diambil dari masing-masing rumah sakit. Nilai SSDEDE diperoleh dari perhitungan dengan persamaan yang tertera pada AAPM report no. 204. Hasil menunjukkan bahwa, secara umum, nilai parameter dosis SSDEDE lebih tinggi dari CTDIvol pada pasien yang sama. Selain itu, rumah sakit di Jakarta Selatan memiliki nilai SSDEDE dan CTDIvol tertinggi, yaitu 38.534 mGy dan 28.016 mGy. Hasil tersebut menunjukkan pengaruh ukuran tubuh pasien terhadap perhitungan dosis serta SSDEDE menunjukkan potensi sebagai parameter dosis dalam penentuan DRL terlihat dari nilai koefisien kolerasinya (R2 ) 0.8992.
Characteristic of Background Seismic Noise of Local Tarutung Earthquake Based on Power Spectral Density and Probabilistic Density Function Method Sinambela, Marzuki; Hartoyo, Puji
JUKI : Jurnal Komputer dan Informatika Vol. 7 No. 1 (2025): JUKI : Jurnal Komputer dan Informatika, Edisi Mei 2025
Publisher : Yayasan Kita Menulis

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

Abstract

An evaluation of four broadband BMKG stations' ambient seismic noise is provided. Knowing the seismic ambient noise tiers confirmed by a community of seismic stations is essential for earthquake monitoring and detection purposes in the Sumatra area. Waveform records from May 2020 are used to calculate the power spectral density and likelihood density characteristic (PSDPDF) for a single day when an excessive noise stage is detected. This study aims to assess the vertical channel of waveform data using waveform information in miniSEED and SAC architecture. Because of their low probability of occurrence, the method used permits the use of data contaminated with earthquakes (a 4.8 magnitude earthquake occurred on May 11, 2020, at Tarutung, North Sumatera, Indonesia) and other demanding signals. The results obtained are extremely important for assessing the overall performance of the current seismic broadband stations, evaluating the web page resolution of new stations, and modifying the detection settings for the computerized processing machine in the Indonesia Seismic Network. Compared to TTSM, TKSM, and RSSM stations, the noise at LSTM stations is weaker, but the likelihood of an increase increases at high frequencies. Cultural noise in human endeavors produces certain noise and fluctuation over extended periods of time, which is typically certified for the process of earthquake signals
Impact of Different Grids on the Quality of Abdominal Radiography Images Shekti, Shitoch Armandho Bimo; Sari, Ni Larasati Kartika; Hartoyo, Puji; Muliyati, Dewi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v13i1.22202

Abstract

Grids are additional accessory in radiography that absorb scatter radiation hoping to reduce blurriness on the image.  Various type of grids is available in the market so the effect of those on image quality needs to be evaluated. The purpose of this study is to compare the quality of abdominal radiography images using three variations of grids (moving and stationary grid) and without using a grid in order to see the best type or grids to produce the greatest image quality. Abdominal radiography exposure factors were used to expose two phantoms. Pro-Fluo 150 phantom was used as the object to measure image quality such as Signal to Noise Ratio (SNR), Contrast to Noise Ratio (CNR), and spatial resolution. A survey of five radiologists was also performed to evaluate the contrast and the visibility of objects’ boundaries in Anthropomorphic phantom images. The result of this study showed that the usage of various grids gave different values of SNR, CNR, and spatial resolution. The exposure factor of 70-75 kV in each mAs have the highest SNR value (52,64-78,31). Images obtained without a grid and exposure factor of 80-85 kV in each mAs have the highest SNR value (160,65-800,48). Images obtained from using moving grid also have the highest CNR and spatial resolution, with score of 3.72 – 7.62 and 3.7 lp/mm. The results of radiologists’ survey showed that the average score for moving grid’s images was 29.8 of 30 with a percentage of 99.33%. Therefore, it that can concluded that images obtained with moving grid have the best quality that can provides contrast and shows the boundaries between organs clearly in abdominal radiography. Based on this research, it’s recommended to use moving grid for abdominal radiography examinations.
Evaluation of the Hydraulic Fracturing Implementation at Well WEA-01 Layer A3 Kaesti, Edgie Yuda; Suwardi, Suwardi; Widyaningsih, Ratna; Yusrizal, Muhammad Zakiy; Rifqi, Wijaya Ananditya; Hartoyo, Puji
Journal of Petroleum and Geothermal Technology Vol. 4 No. 2 (2023): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jpgt.v4i2.9834

Abstract

The WEA-01 well produces in the A3 productive layer, talangakar formation with a layer thickness of 32.80 ft with a perforation interval of 4340.55 – 4360.24 ftMD where from petrophysical data this formation is dominated by sandstone with a permeability of 3 mD which is classified as low and a tight formation (Koesoemadinata, 1980) with 10% porosity. This is the basis for the stimulation of Hydraulic Fracturing. Hydraulic fracturing that has been implemented needs to be evaluated to find out whether the implementation has been carried out optimally or not.The method to be used in the evaluation of the WEA-01 Well hydraulic fracturing implementation includes data collection, then manual calculations and evaluation with actual data. The first evaluation was to calculate the geometry of the fracture using the 2D PKN method, the second evaluation was to calculate the price increase in the productivity index using the Cinco-ley Samaniego and Dominique method and the third evaluation was to analyze the IPR curve (Inflow Performance Relationship) before fracturing using the Darcy method and after fracturing using the Pudjo Sukarno method.Based on the results of manual fracture geometry calculations using the 2D PKN method, the results obtained are fracture length (Xf) of 200.07 ft, fracture height (hf) of 32.80 ft, and fracture width (wf) of 0.23 inch, fracture conductivity of 5094.70 mD-ft, and FCD 8.5, while the results of calculating the average permeability of formations using the Howard & Fast method obtained permeability after Hydraulic Fracturing of 15.71 mD or an increase of 5.2 times from the initial conditions and calculating the productivity index using the Cinco-Ley, Samaniego & Dominique method obtained an increase in PI prices of 3.45 times and from the determination of the IPR curve, the results obtained from the comparison of the IPR curve showed an increase in the production rate from 45.00 BOPD to 330 BOPD. Based on the increase in the fluid production rate, the implementation of Hydraulic Fracturing that has been carried out can be said to be successful.Keywords – hydraulic fracturing, fracturing fluid, proppant, fracture geometry, permeability, conductivity
EVALUATING CUTTING TRANSPORT ON 12 ¼” SECTION WELL TM-1 Widyaningsih, Ratna; Idea, Kharisma; Utami, Ayu; Putradianto, Ristiyan Ragil; Jati, Dhika Permana; Dzulfiansyah, Pratama; Hartoyo, Puji
Journal of Petroleum and Geothermal Technology Vol. 5 No. 1 (2024): May
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jpgt.v5i1.10742

Abstract

Mud hydraulics on a 12-1/4" section needs to be planned properly. Mud hydraulics design on a 12-1/4" section includes determining mud density, flow type, pressure loss, pump specifications, bit hydraulics and cutting lifting design. The purpose of bit hydraulics design is to determine the optimum flow rate. Mud hydraulics optimization is carried out using methods the Bit Hydraulic Horse Power (BHHP), Bit Hydraulic Impact (BHI) and Jet Velocity (JV) methods, where the analysis is in the form of graphs. The graph is analyzed by using a trial and error method to obtain the recommended flow rate so as to provide good cutting lifting. where the expected recommendation analysis are Cutting Transport Ratio (Ft) > 90%, Cutting Concentration (Ca) < 5%, and Carrying Capacity Index (CCI) > 1. The analysis results from the graph show that for the hole 12-1/4", it is recommended to use an optimum flow rate of 626.6 gpm with minimum value of Ft is 90.01%, Ca is 0.87% and CCI is 1.95. These values are stated to be good by using 15-15-16 nozzle bit combination. The Flowrate value can be increased up to 785 gpm by using 18-18-20 nozzle bit combination.. Keywords: Hydraulic Mud Planning, Optimum Flow Rate, Cuttings Removal.
Evaluasi Nilai Signal to Noise Ratio (SNR) dengan Penerapan Aturan 10 kVp dan 15% kVp pada Objek Stepwedge Setiawan, Philip Emanuel Deo; Hartoyo, Puji; Widodo, Susilo; Kartika, Ni Larasati
Jurnal Ilmiah Giga Vol. 28 No. 1 (2025): Volume 28 Edisi 1 Tahun 2025
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v28i1.3958

Abstract

Citra radiografi merupakan citra medis yang diperoleh dengan menggunakan radiasi pengion. Kualitas citra radiografi dipengaruhi oleh banyak faktor, diantaranya faktor eksposi serta keberadan anode heel effect. Beberapa strategi digunakan untuk meningkatkan kualitas citra radiografi dengan tetap memberika dosis yang wajar, salah satunya adalah aturan kVp. Penelitian ini membahas tentang analisa nilai Signal to Noise Ratio (SNR) dengan penggunaan aturan yang berbeda, aturan 10 kVp dan 15% kVp. Penelitian ini bertujuan untuk mendapatkan kombinasi faktor eksposi yang menghasilakan citra dengan SNR tertinggi. Tegangan tabung yang digunakan adalah 40 kV sampai 70 kV, divariasikan sesuai dengan aturan 10 kVp dan 15% kVp, dengan total 4 variasi faktor eksposi untuk aturan 10 kVP dan 5 variasi untuk aturan 15% kVp. Stepwedge berbahan aluminium yang memiliki 10 tingkatan dengan ketinggian tiap tingkatan 2 mm digunakan sebagai objek. Stepwedge diletakkan horizontal, sejajar dengan meja pemeriksaan dengan jarak 100 cm dari fokus pesawat sinar-X. Hasil penelitian menunjukkan bahwa kenaikan faktor eksposi dapat meningkatkan nilai SNR. Semakin tinggi tegangan tabung dan mAs maka nilai SNR akan meningkat. Hasil penelitian ini menunjukkan bahwa penggunaan 70 kV dan 4 mAs lebih dianjurkan karena menghasilkan noise lebih rendah daripada penggunaan 70 kV dan 2 mAs.
Spatiotemporal Dynamics of Seismic Activity in the Toba Caldera based on DBSCAN Clustering Algorithms Sinambela, Marzuki; Purwantiningsih, Purwantiningsih; Anita, Febria; Hartoyo, Puji; Mutanto, Ari
JUKI : Jurnal Komputer dan Informatika Vol. 7 No. 2 (2025): JUKI : Jurnal Komputer dan Informatika, Edisi Nopember 2025
Publisher : Yayasan Kita Menulis

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

Abstract

Salah satu sistem vulkanik terpenting di dunia, Kaldera Toba, memiliki lingkungan seismotektonik yang kompleks akibat interaksi antara tektonik regional, proses vulkanik, dan dinamika kaldera. Kinerja algoritma Density-Based Spatial Clustering of Applications with Noise (DBSCAN) menjadi fokus utama penelitian ini, yang menggunakan pendekatan pembelajaran mesin tanpa pengawasan untuk mengevaluasi aktivitas seismik di Toba Geopark antara tahun 2019 dan 2022. Sebagai fitur masukan, parameter gempa seperti magnitudo, percepatan tanah maksimum, kedalaman hiposentrum, dan posisi geografis digunakan. Indeks Davies-Bouldin, indeks Calinski-Harabasz, dan koefisien siluet digunakan untuk menilai kinerja pengelompokan. Berbeda dengan kinerja yang diamati di lokasi yang dipengaruhi tektonik, hasil menunjukkan bahwa DBSCAN sangat efektif di lingkungan vulkanik, mencapai skor siluet 0,679 dan indeks Davies-Bouldin 0,404. Sifat diskrit dan terkendali struktur dari seismisitas vulkanik tercermin dalam identifikasi DBSCAN terhadap enam kluster seismik kompak yang terkait dengan struktur kaldera unik dan klasifikasinya terhadap 91,48% peristiwa sebagai noise. Korelasi yang kuat antara kluster yang terdeteksi dan karakteristik vulkanik yang dikenal, seperti tepi kaldera, kompleks vulkanik pusat, dan sistem patahan yang berinteraksi, terungkap melalui analisis spasial. Hasil ini menunjukkan keefektifan algoritma klustering yang spesifik lingkungan dan membantu dalam pengembangan metode berbasis pembelajaran mesin untuk penilaian risiko dan pemantauan seismik.
PENINGKATAN EFISIENSI PANEL SURYA MELALUI PERAWATAN BERKALA Ruliyanta, Ruliyanta; Kusumoputro, R. A. S; Hartoyo, Puji
JMM (Jurnal Masyarakat Mandiri) Vol 8, No 1 (2024): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v8i1.20255

Abstract

Abstrak: Panel surya memanfaatkan photovoltaic dan merupakann sumber pembangkit listrik terbarukan. Efisiensi panel surya tergantung pada kondisi permukaan panel tersebut. Benda yang menghalangi sinar matahari dapat mengganggu efisiensi listrik yang dihasilkan. Salah satu gedung yang memiliki pembangkit listrik tenaga surya adalah gedung Inalum. Permasalahannya, para teknisi belum memahami perawatan pembaangkit listrik tenaga surya. Untuk itu diusulkan pelatihan di gedung ini dengan tujuan memberikan tambahan pengetahuan. Pelatihan diikuti oleh 11 teknisi dan 2 orang supervisor. Sistem evaluasi yang dilakukan dengan cara melakukan pra dan pasca test dengan soal yang sama. Sebelum dan Proses pelatihan mendapatkan penilaian sebesar 4,23 skala 5. Sementara pelatihan ini mampu meningkatkan kemampuan peserta pelatihan sebesar 60,77% menjadi 95,38% atau mengalami kenaikan sebesar 34,16%. Dengan bekal pelatihan ini harapannya pembangkit listrik tenaga surya yang ada di gedung Inalum memiliki efisiensi yang baik melalui perawatan yang berkala.Abstract: Solar Cells are a technology that converts solar energy into electrical energy. Solar panels utilize photovoltaics and are a renewable source of electricity generation. The efficiency of solar panels depends on the surface condition of the panels. Objects that block sunlight can interfere with the efficiency of the electricity produced. One of the buildings with a solar power plant is the Inalum building. The problem is that technicians need to understand the maintenance of solar power plants. For this reason, training is proposed in this building to provide additional knowledge. Eleven technicians and two supervisors attended the training. The training process received an assessment of 4.23 on a scale of 5. Meanwhile, this training increased the training participants' abilities by 60.77% to 95.38% or an increase of 34.16%. With this training, the solar power plant in the Inalum building will have good efficiency through regular maintenance. 
Co-Authors Ari Mutanto, Ari Ayu Utami, Ayu Dewi Muliyati Dzulfiansyah, Pratama Edgie Yuda Kaesti Febria Anita, Febria Idea, Kharisma Jati, Dhika Permana Kartika, Ni Larasati Kusumoputro, R. A. S Marzuki, Sinambela Purwantiningsih, Purwantiningsih Putradianto, Ristiyan Ragil Repi, Viktor Vekky Ronald Rifqi, Wijaya Ananditya Ruliyanta Ruliyanta Sari, Ni Larasati Kartika Setiawan, Philip Emanuel Deo Shekti, Shitoch Armandho Bimo Susilo Widodo, Susilo Suwardi Suwardi Widyaningsih, Ratna Wonga, Hiasintus Yusrizal, Muhammad Zakiy