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Endarko Endarko
Department of Physics, Institut Teknologi Sepuluh Nopember, Kampus ITS-Sukolilo Surabaya
Physics

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Assessment of 3D-Printed Bolus for Post-Mastectomy Breast Cancer Radiation Therapy: Urifa Nabihal Aini, Hayfa Annisa, Diska Maharani, Aditya Prayugo Hariyanto, Agus Rubiyanto, Nasori Nasori, Aloysious Mario, Endarko Endarko Urifa Nabihal Aini Urifa Nabihal Aini; Hayfa Annisa Hayfa Annisa; Diska Maharani Diska Maharani; Aditya Prayugo Hariyanto Aditya Prayugo Hariyanto; Agus Rubiyanto Agus Rubiyanto; Nasori Nasori; Aloysious Mario Aloysious Mario; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 20 No 2 (2024): June 2024 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v20i2.20671

Abstract

The fabricated 3D-printed bolus with 5 mm thick PLA and TPU materials was successfully used to analyze the air gap, relative electron density ( RED), and mass attenuation coefficient values for Post-Mastectomy Breast Cancer Radiation Therapy (PMRT). The 3D bolus was designed using 3D-Slicer Segment Editor software according to the thickness used, then smoothed and finished using Autodesk Meshmixer software, and printed on a 3D Creality printer. The air gap value was then analyzed by taking images from the phantom and 3D-printed bolus on a CT-Scan, then processed on Radiant DICOM, and the air gap value for the two 3D bolus materials was obtained. Analysis of two 3D bolus materials, PLA and TPU, showed that TPU is more suitable for bolus use in postmastectomy breast cancer cases based on its material properties. In addition, TPU is also better in terms of the air gap value because it has a smaller air gap, an RED value that is almost close to that of breast tissue, and better mass attenuation. Therefore, the recommended 3D-printed bolus material is TPU with a thickness of 5 mm as a tissue substitute for postmastectomy breast cancer cases.
Optimization of Low-Dose Pediatric Chest CT Examination: Pediatric Phantom Study: Dafa Miftahuddin, Audiena Gelung Prayitno, Aditya Prayugo Hariyanto, Djuli Pontjowijono, Endarko Endarko Dafa Miftahuddin Dafa Miftahuddin; Audiena Gelung Prayitno Audiena Gelung Prayitno; Aditya Prayugo Hariyanto Aditya Prayugo Hariyanto; Djuli Pontjowijono Djuli Pontjowijono; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 20 No 1 (2024): January 2024 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v20i1.19814

Abstract

This study uses a Pediatric Thoracic phantom developed in-house to optimize low-dose pediatric chest CT examinations based on organ-specific dose and image quality. Four low-dose protocols, low kV and low mA, reconstructed using Filtered Back Projection (FBP) and iterative reconstruction (IR) algorithms, were investigated. Lung, heart, and spinal cord doses were measured using calibrated Gafchromic LD-V1 Film. Evaluation of image spatial resolution and noise are considered. The CTDIvol results underestimate organ-specific doses. Low kV exposed an average dose of 29.55% less than low mA. No significant differences existed in the MTF curves of standard, low mA, or low kV doses. The peak NPS for low kV is significantly higher than for low mA. The combination of low kV and FBP produces images with better high spatial resolution. Meanwhile, combining low mA with an IR algorithm effectively reduces image noise so that low-contrast object detection improves.
Rancang Bangun Alat Kardiografi Berbasis Impedansi Listrik (Electrical Impedance Cardiography): Fajar Timur, Endarko Endarko Fajar Timur Fajar Timur; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 16 No 3 (2020): October 2020 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6186

Abstract

Electrocardiography is a process or method to observe and record the activity of the heart by using a graph of electrical voltage versus time. A standard plan to achieve this is by measuring the bioelectric potential or bioimpedance of the heart organ. In this research, an electrical impedance cardiography device will be designed and tested. The process is carried out by using four electrodes that are attached at the neck and the diaphragm level of the body, an electric current with a specific value and frequency, then injected on a pair of electrodes, and the voltage will be measured on other pair of electrodes. The device testing process is carried out on subjects in good health and having no medical abnormality in a sitting and upright position. Impedance data will be measured and recorded at each time; the data that has been obtained will then be processed to determine the impedance graph Z and the first derivative of Z (dZ/dt). The number of heartbeats will also be calculated each time with another method, which is by using a stopwatch to compare the validity of the heart rate readings from the impedance cardiography device. The result demonstrated that the electrical impedance cardiography device that has been made could be used to illustrate heart rate graphs as a result of cardiovascular activity.
Blood Pressure Monitor Design Using MPX5050GP Pressure Sensor and Visual C# 2010 Express: Ayu Jati Puspitasari, Endarko Endarko, Iim Fatimah Ayu Jati Puspitasari Ayu Jati Puspitasari; Endarko Endarko; Iim Fatimah Iim Fatimah
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4929

Abstract

Blood pressure monitor (BPM) using oscillometric method with MPX5050GP pressure sensor has been successfully fabricated and calibrated. Oscillometric method is measurement method to observe cuff pressure oscillations. In this study, the oscillometric waveform measured by fabricated BPM used Arduino Uno which processes pulse rate, systolic and diastolic pressures. Measurement results of pulse rate, systolic and diastolic pressures will be displayed and recorded in application designed using Visual C# 2010 Express. Fabricated BPM capable of measuring pulse rate and blood pressure in the range of 40-260 mmHg with ratio of systolic and diastolic pressures were achieved 0.48 and 0.78, respectively. The system has an average error of systolic pressure, diastolic pressure, and pulse rate were -4.38 mmHg (2.72%), 0.10 mmHg (5,55%), and 4.48 bpm (6.07%).
Penggunaan Komposit Layer TiO2 / SnO2 sebagai Fotoanoda pada Dye Sensitized Solar Cell: M N Fajar, R Hidayat, Triwikantoro, Endarko M. N. Fajar M. N. Fajar; R. Hidayat R. Hidayat; Triwikantoro Triwikantoro; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 15 No 1 (2019): January 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i1.4487

Abstract

Photoanode is one component of dye-sensitive cell solar (DSSC) which synthesized from metal oxide semiconductor materials with nanoparticle size that deposited onto the transparent conductive glass. The semiconductor material used must meet several criteria such as a wide surface and a high level of porosity so that it can absorb dye properly. One modification that is often done on DSSCs was to improve its performance by applying TiO2/ SnO2 to DSSC photoanodes. In this study, the performance of the synthesized DSSC with TiO2/SnO2 composites with both single and double layers structure will be compared to the performance of the synthesized DSSC from either photoanodes with a single layer structure of TiO2 or SnO2. The results showed that the high-efficiency of the DSSC could be achieved for both TiO2 and SnO2 single layer with value at 2.12 and 2.06%, respectively.
Studi Awal Solar Water DistillerAir Laut Dengan Limbah Botol Plastik Untuk Penyediaan Air Bersih: Endarko, Suasmoro, Triwikantoro, Agus Purwanto, Zaenal Arifin, Mashuri, Yoyok Cahyono, Yanurita Dwi Hapsari, Heru Sukamto, Suminar Pratapa, Herliansyah, Fachrina Maryam, Mira Anjani, dan Niken Rancangkapti Endarko Endarko; Suasmoro Suasmoro; Triwikantoro Triwikantoro; Agus Purwanto Agus Purwanto; Zaenal Arifin Zaenal Arifin; Mashuri Mashuri; Yoyok Cahyono Yoyok Cahyono; Yanurita Dwihapsari Yanurita Dwihapsari; Heru Sukamto Heru Sukamto; Suminar Pratapa Suminar Pratapa; Herliansyah Herliansyah; Fachrina Maryam Fachrina Maryam; Mira Anjani Mira Anjani; Niken Rancangkapti Niken Rancangkapti
Jurnal Fisika dan Aplikasinya Vol 14 No 2 (2018): June 2018 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v14i2.3572

Abstract

It has been successfully investigated the utilization of waste plastic bottles as a solar water distiller for the provision of clean water. In this study 600 and 1500 mL plastic bottles used for solar water distiller with 9 variations. A 600 mL bottle with a variation of the addition of soda cans painted black or not (3 variations) as type A. Hereinafter, 600 mL plastic bottle connected with 1500 mL plastic bottle positioned above 600 mL bottle contained small plastic bottle placed in bottle 1500 mL with variations of either painted black or not (3 variations) is called type B. Moreover, the next three variations are 1500 mL bottles cut in half to resemble open containers with smaller plastic bottles placed inside whether painted black or not (Type C). Furthermore, as a comparison of plastic containers (basin) with a diameter of 25 cm used for the solar distiller. The study was conducted with 30 mL of seawater as the initial data, after 8 hours exposed to the sunlight. The results showed that plastic containers had better efficiency compared to all types of the plastic bottle as solar distiller with the value up to (55.7 ± 3.1)%, while for the distillation system with plastic bottles, the highest efficiency was obtained type distillation system A with a range of 11-13%. While for type B and C respectively equal to 1-4%.
Pengaruh Ketebalan Lapisan TiO2 terhadap Performasi Dye Sensitized Solar Cells: Nurrisma Puspitasari, Nurul Amalia Silviyanti, Gatut Yudoyono, Gontjang Prajitno, Agus Rubiyanto, Endarko Nurrisma Puspitasari Nurrisma Puspitasari; Nurul Amalia Silviyanti Nurul Amalia Silviyanti; Gatut Yudoyono Gatut Yudoyono; Gontjang Prajitno Gontjang Prajitno; Agus Rubiyanto Agus Rubiyanto; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 14 No 1 (2018): January 2018 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v14i1.3553

Abstract

Dye Sensitized Solar Cell (DSSC) is the third generation of solar cells. DSSC is formed by sandwich structure, there are five parts: ITO glass (Indium Tin Oxide) as substrate; TiO2 as semiconductor material; dye (chlorophyll-turmeric-mangosteen) as an electron donor; gel electrolyte as electron transfer and active carbon as a catalyst in the counter electrode. The synthesis of nanometer-sized TiO2 powder is obtained by coprecipitation method. From the research that has been done, the efficiency of DSSC with 10 µm TiO2 layer thickness bigger than 20 µm and 30 µm layer thickness. The DSSC efficiency result is 0.25% for 10 µm TiO2 layer thickness , 0.143% for 20 µm TiO2 layer thickness, and 0.195% for 30 µm TiO2 layer thickness.
Pengaruh Jenis Katalis pada Elektroda Pembanding terhadap Efisiensi Dye Sensitized Solar Cells dengan Klorofil sebagai Dye Sensitizer: Nurrisma Puspitasari, Siti Rabiatul Adawiyah, Muhammad Noer Fajar, Gatut Yudoyono, Agus Rubiyanto, Endarko Nurrisma Puspitasari Nurrisma Puspitasari; Siti Rabiatul Adawiyah Siti Rabiatul Adawiyah; Muhammad Noer Fajar Muhammad Noer Fajar; Gatut Yudoyono Gatut Yudoyono; Agus Rubiyanto Agus Rubiyanto; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 13 No 1 (2017): January 2017 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v13i1.2150

Abstract

Dye-sensitized Solar Cell (DSSC) is a dye sensitized solar cells are formed by a sandwich structure where there are five parts include: glass ITO (Indium Tin Oxide) as a substrate; TiO2 as a semiconductor material; chlorophyll dye as an electron donor; electrolyte as electron transfer. Nanometer-sized TiO2 powder obtained through synthesis by coprecipitation method. Measurements were taken at the power of 100 mW/cm2. The results of the efficiency of DSSC using active carbon as a catalyst in the reference electrode, produces a larger percentage than black carbon and graphite, which is of 0.05% for active carbon, black carbon to 0.032%, 0.029% for graphite.
Co-Authors Aditya Prayugo Hariyanto Aditya Prayugo Hariyanto Agus Purwanto Agus Purwanto Agus Rubiyanto Agus Rubiyanto Aloysious Mario Aloysious Mario Audiena Gelung Prayitno Audiena Gelung Prayitno Ayu Jati Puspitasari Ayu Jati Puspitasari Dafa Miftahuddin Dafa Miftahuddin Diska Maharani Diska Maharani Djuli Pontjowijono Djuli Pontjowijono Fachrina Maryam Fachrina Maryam Fajar Timur Fajar Timur Gatut Yudoyono Gatut Yudoyono Gontjang Prajitno Gontjang Prajitno Hayfa Annisa Hayfa Annisa Herliansyah Herliansyah Heru Sukamto Heru Sukamto Iim Fatimah Iim Fatimah M. N. Fajar M. N. Fajar Mashuri Mashuri Mira Anjani Mira Anjani Muhammad Noer Fajar Muhammad Noer Fajar Nasori Nasori Niken Rancangkapti Niken Rancangkapti Nurrisma Puspitasari Nurrisma Puspitasari Nurul Amalia Silviyanti Nurul Amalia Silviyanti R. Hidayat R. Hidayat Siti Rabiatul Adawiyah Siti Rabiatul Adawiyah Suasmoro Suasmoro Suminar Pratapa Suminar Pratapa Triwikantoro Triwikantoro Urifa Nabihal Aini Urifa Nabihal Aini Yanurita Dwihapsari Yanurita Dwihapsari Yoyok Cahyono Yoyok Cahyono Zaenal Arifin Zaenal Arifin