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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Ilmiah Aplikasi Isotop Radiasi Journal of Degraded and Mining Lands Management Jurnal Keteknikan Pertanian Tropis dan Biosistem Journal of Engineering and Technological Sciences ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya FaST : Jurnal Sains dan Teknologi International Journal of Remote Sensing and Earth Sciences (IJReSES) Instrumentasi Formosa Journal of Sustainable Research (FJSR) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Sastra Kusuma Wijaya
Departemen Fisika Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Design and performance of very low head water turbines using a surface vorticity model algorithm Ridwan Arief Subekti; Budi Prawara; Anjar Susatyo; Ahmad Fudholi; Sastra Kusuma Wijaya; Arief Sudarmaji
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 13, No 2: June 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v13.i2.pp1140-1149

Abstract

This study explores the numerical optimization of water turbine runner profile performance using a surface vorticity model algorithm. The turbine is designed on a laboratory scale and operates at a net head of 0.09 m, 400 rpm, and a water flow rate of 0.003 m3/s. The initial design of the turbine runner was optimized to minimize losses in the hydrofoil. The optimization algorithm is coded in MATLAB software to obtain the optimal stagger angle that will be used in the water turbine design. Furthermore, design validation was performed using computational fluid dynamics analysis ANSYS CFX to determine the water turbine performance. The settings used in ANSYS CFX include the reference pressure of 1 atm, turbulence model shear stress transport, and inlet boundary conditions using total pressure and static pressure outlet boundary conditions. The computational fluid dynamics analysis reveals that by optimizing the design, the efficiency of the water turbine increases by approximately 2.6%. The surface vorticity model algorithm can be applied to optimize the design of the water turbine runner.
Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation Sabar Sabar; Dewi Maulidah Nur Anjani; Sastra Kusuma Wijaya
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.4
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v4i1.19808

Abstract

This virtual instrumentation system based on Arduino and LabVIEW aims to detect the water level using a water level sensor. The water level sensor used to measure the water level is the Funduino type. This sensor and the buzzer module are connected to the Arduino Uno to transmit data to LabVIEW. When the water has reached a certain height, this sensor will detect the water level. When the water has reached the set point, this sensor will sound a buzzer as a sign that the water is full. Based on the experimental results, it is found that the tension value affects the volume of the experiment site. Where the greater the volume used will produce a large voltage, and vice versa. Furthermore, the graph results obtained that are still away from the linearity of a regression function with a value of y = 0.0079x + 1.8561 and R² = 0.4298.
Fan Beam Tomography Technique for Scale Thickness Measurement in Geothermal Pipeline West Java Area Wibisono Wibisono; Firliyani Rahmatia Ningsih; Paston Sidauruk; Sastra Wijaya Kusuma
Jurnal Ilmiah Aplikasi Isotop dan Radiasi Vol 16, No 2 (2020): Desember 2020
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jair.2020.16.2.6039

Abstract

In the industrial field, tomography technique has been developed for inspection or maintenance by obtaining cross-sectional images of an object. Tomography application in geothermal power plant assist online inspection without interrupting operation process. Identification of scale materials in online condition is required to observe steam pipe productivity. A fan beam computed tomography system using gamma-ray transmission has been developed in laboratory experiment and field work. The aim of this study is to identify scale materials and its’ parameters, for instance geometry, density, and concentration of elements. The system feature is an arc up to 100°, vertex distance of 413.5 mm, fan rotation increment of 2.813°, and fan sensor spacing of 0.781°. This auto control system is used to scan geothermal pipe with outer diameter (OD) of 220 mm and thickness of 8.18 mm. Gamma radiation source which used is Scandium-46 (Sc-46) with activity 15 mCi. In this paper, experiment data are compared with Monte Carlo simulation method to strengthen interpretation. The results showed that image reconstruction successfully identify geometry and distribution scale materials inside the pipe which is the thickest located in d position 62 mm. Element analysis tested using neutron activation analysis (NAA) method contain some elements, with confidence level 95%.
Sistem Otomasi Ekstraksi Radiocessium pada Pengambilan dan Preparasi sampel untuk Menentukan Kualitas Air Sabar Sabar; Mohamad Nur Yahya; Zunanik Mufidah; Sastra Kusuma Wijaya; Duwi Hariyanto; Kisna Pertiwi
Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol 9, No 2 (2021)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2021.009.02.03

Abstract

Telah dilakukan pembuatan sistem otomasi untuk ekstraksi radiocessium pada filter preparasi dan filter pengambilan sampel dalam menentukan kualitas air. Sistem otomasi dilakukan dengan cara mengintegrasikan antara pompa, flowmeter dan sensor pendeteksi cairan mengunakan perangkat keras Arduino Uno. Struktur pemrograman yang ditanamkan pada perangkat Arduino menggunakan bahasa pemrograman C dan dikomunikasikan secara serial dengan komputer menggunakan bahasa pemrograman LabVIEW. Validasi sistem otomasi pada mode sampling dilakukan dengan membandingkan antara volume set poin dengan volume yang dihasilkan serta membandingkan tingkat kejernihan cairan. Untuk mengetahui tingkat keberhasilan preparasi pada filter ekstraksi dilakukan pengambilan data pada cairan yang digunakan sebagai media ekstraksi. Data hasil rekaman flowmeter diperoleh persamaan y = 2601.3????-31.183 dengan linearitas sebesar 0.9788. Karakteristik ADC pada cairan ekstraksi berkisar antara 30 – 60. nilai tersebut digunakan sebagai referensi pada mode preparasi media ekstraksi filter radiocesium. Hasil validasi sistem otomasi tersebut menampilkan kesesuaian antara parameter yang di input dengan yang dihasilkan serta kestabilan pada pembacaan parameter.
DETEKSI AGLUTINASI SECARA OTOMATIS UNTUK UJI GOLONGAN DARAH TIPE ABO BERBASIS KERTAS Juli Handono; Sastra Kusuma Wijaya; Anwar Soefi Ibrahim
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol 1, No 1 (2017): November
Publisher : Universitas Pelita Harapan

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

Abstract

ABSTRACT.  The research is the early study of development of automatic detection for  the paper-based agglutination devices as a determinant of ABO blood typing, namely the integration of the blood type test equipment based on paper chromatography and forward grouping method with agglutination detection through image processing. Paper test was made by Whatman No. 4 filter paper with three hydrophilic columns, the paper test pattern were printed by using laser printers and cutting process to make hydrophobic field, paper test printed were placed in waterproof cases that was printed with a 3D printer. Reagents anti-A, anti-B and Anti-D (rhesus) were immobilized on each hydrophilic columns. By measurement of optimization paper strips obtained the value of optimization volume of reagents immobilized and optimization of blood volume test, each 6 µl Anti-A, Anti-B and Anti-D were immobilized on hydrophilic columns and 40 µl amount of blood sample needed for testing. The preliminary study was produced image processing software for blood agglutination detection with Absolute Subtract Difference (ASD) method, it was designed to support single-board computer Raspberry Pi and mini camera for decision result of blood type on the display. The test results get a high accuracy by comparing the results with slide test method.
Data Acquisition System Design of Length Gauge Ocka Hedrony; Bernadus H. S; Adindra Vickar Ega; Ghufron Zaid; Sastra Kusumawijaya
Instrumentasi Vol 42, No 2 (2018)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v42i2.161

Abstract

Length gauge is one of measurement standard in the Length Metrology Laboratory, Research Center Metrology – LIPI. Practical use and good accuracy make it a mainstay in calibration. In use, length gauge requires a display unit to display readings of measuring results. The display unit is very susceptible to damage because it is directly connected to an electric power supply. To procure the display unit, requires funds and time. Therefore, the objective of the research is to design a length gauge data acquisition system that is simple and low cost without compromising function. Research was carried out by making a current into a voltage converter, converting an analog voltage signal into a pulse signal, separates the signal when the length gauge moves up and down, counting the generated pulse signal and displays it on the PC. Once the data acquisition system is calibrated, it was found that the readability of the system is 2 μm and with an uncertainty of 2.0 m. With this value of this uncertainty, based on ANSI/NCSL Z540-1-1994, the data acquisition system can be used as standard to calibrate measuring devices with an accuracy of at least 8 m.
DESAIN DAN PEMBUATAN PROTOTIPE PULSE ELECTROMAGNETIC THERAPY (PEMFT) UNTUK STUDI BIOELEKTROMAGNETIK Umiatin Umiatin; Tesa Apriyanti; Sastra Kusuma Wijaya
Spektra: Jurnal Fisika dan Aplikasinya Vol 2 No 3 (2017): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 2 Nomor 3, Desember 2017
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (565.081 KB) | DOI: 10.21009/SPEKTRA.023.01

Abstract

Abstrak Pulse Electromagnetic Therapy (PEMFt) atau lebih dikenal dengan PEMF merupakan salah satu modalitas yang disetujui oleh Food and Drug Administration (FDA) untuk membantu proses penyembuhan fraktur tulang non union (gagal sambung). Saat ini alat PEMF yang dijual dengan harga yang tidak murah, memiliki parameter fisis yang bervariasi sehingga dalam penggunaannya menghasilkan efektivitas beragam dan terkadang menimbulkan kontraindikasi. Dalam penelitian ini telah dilakukan desain, pembuatan dan uji coba prototipe alat PEMF menggunakan Arduino dan Labview. Tujuan dari penelitian ini adalah mendapatkan alat PEMF yang dapat digunakan dalam penelitian bioloektromagnetik. Penelitian dilakukan dalam tiga tahap yaitu tahap desain dan perancangan perangkat keras, desain dan perancangan perangkat lunak dan tahap ketiga adalah ujicoba alat PEMF untuk penelitian fraktur tulang menggunakan hewan coba tikus. Pada tahap pertama dibuat kumparan Helmholtz dengan diameter 40 cm, jumlah lilitan 500, menggunakan kawat tembaga 0.7 mm. Karakterisasi medan magnet yang dihasilkan dengan menggunakan Gaussmeter IDR 324 pada sumbu x, pada tegangan 18 V dan arus sebesar 0.28 A, menghasilkan medan magnet homogen sebesar 0.4 mT. Pada tahap kedua dilakukan pembuatan kode program alat PEMF menggunakan Labview dan mikro kontroler Arduino Uno. Parameter fisis PEMF yang dikendalikan adalah waveform, frekuensi, duty cycle, burst time dan exposure time. Pembuatan antar muka dan pengolahan data dilakukan menggunakan program LabVIEW. Pada tahap ketiga telah dilakukan ujicoba prototipe alat PEMF yang dibuat untuk studi pada hewan coba yaitu tikus Spraque Dawley selama 28 hari. Kata-kata kunci: Kumparan Helmholtz, PEMF, Bioelektromagnetik, Arduino Uno, LabVIEW. Abstract Pulse Electromagnetic Therapy (PEMFt) or better known as PEMF is one of the modalities approved by the Food and Drug Administration (FDA) to assist the healing process of non union bone fractures (failed connect). Currently PEMF equipment sold at a price that is not cheap, has a varying physical parameters so that in its use produce various effectiveness and sometimes contraindicated. In this research have been done design, manufacture and test prototype of PEMF tool using Arduino and Labview. The purpose of this research is to obtain PEMF tool which can be used in bioloectromagnetic research. The research was conducted in three stages, namely design and hardware design, design and software design, and the third step is PEMF testing for bone fracture research using mouse rats. In the first stage is made Helmholtz coil with a diameter of 40 cm, the number of windings 500, using 0.7 mm copper wire. The magnetic field characterization generated using Gaussmeter IDR 324 on the x axis, at a voltage of 18 V and a current of 0.28 A, produces a homogeneous magnetic field of 0.4 mT. In the second stage, the programming of PEMF tools was made using Labview and Arduino Uno micro controller. The controlled PEMF physical parameters are waveform, frequency, duty cycle, burst time and exposure time. Interface creation and data processing is done using LabVIEW program. In the third phase, a prototype PEMF test was made for a study of experimental animals of Spraque Dawley mice for 28 days. Keywords: Helmholtz coil, PEMF, Bioelectromagnetic, Arduino Uno, LabVIEW.
PENGENDALIAN GERAK MOBILE ROBOT BERBASIS BCI (BRAIN COMPUTER INTERFACE) Adbizar Asmon Rizal; Sastra Kusuma Wijaya
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (749.595 KB) | DOI: 10.21009/0305020101

Abstract

Has long been known that neurons in the human brain produces electrical waves that can be measured, these waves obtained by the Emotiv EPOC + to get a signal Electroencephalography (EEG) of 14 pieces of electrodes distributed along the human scalp. Brain Computer Interface (BCI) is a system that allows the control hardware using human brain signals using Electroencephalography (EEG). Brain Computer Interface can be used to control a variety of microcontroller-based devices such as mobile robot control, a robot arm, and wheelchairs to help disabled people. In this study, we developed a system that allows humans to control the direction of motion of the mobile robot wave Electroencephalography (EEG). The system consists of an Emotiv EPOC + Neuroheadset, computers, and mobile robots. Cognitive Suite provided by Emotiv is responsible for generating the necessary control measures to make the mobile robot to perform three different orders: move forward, turn right, and turn left. The experimental results show that the mobile robot can be controlled in real-time based on physiological changes the subject. Keywords: Brain Computer Interface, Emotiv EPOC+, Mobile Robot, Microcontroller.
PENGEMBANGAN ALAT BANTU PEMODELAN TERAPI LENGAN PASCA STROKE DENGAN MEMANFAATKAN SINYAL ELECTROENCEPHALOGRAPHY (EEG) MENGGUNAKAN EMOTIV Ester Fatmawati; Prawito Prawito; Sastra Kusuma Wijaya
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.759 KB) | DOI: 10.21009/0305020307

Abstract

Design modeling has been done post-stroke therapy arm by utilizing command brain signals generated by Electroencephalography (EEG). EEG signals provides a lot of information, one of which is motor information. Every body moving describe the unique form of brain signals. In conditions paralysis, motor information on the EEG signals will still be found when someone tries to move his limbs. The basic concepts of this study are the EEG signal acquisition using the Emotiv EPOC +, controling signal using a device in which NImyRIO and servo motor driving a therapeutic tool. The result of the recording electrode (F3) of Emotiv EPOC shows that differences in the amplitude of the EEG signal in the frequency of 22 Hz when the right arms and left arms trying to move. Differences characteristic EEG signal are used for the motion controller information servomotor. The amplitude of the signal is electric voltage. It is converted into a pulse width to adjust the angle of swivel arm therapeutic tool. Keywords: Electroenchephalography, Emotiv EPOC+, NImyRIO and Frecuency.
The use of multi-sensor satellite imagery to analyze flood events and land cover changes using change detection and machine learning techniques in the Barito watershed Muhammad Priyatna; Sastra Kusuma Wijaya; Muhammad Rokhis Khomarudin; Fajar Yulianto; Gatot Nugroho; Pingkan Mayestika Afgatiani; Anisa Rarasati; Muhammad Arfin Hussein
Journal of Degraded and Mining Lands Management Vol 10, No 2 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.102.4073

Abstract

Indonesia is one of the countries in the world that is frequently affected by floods. Flood disasters can have various negative impacts and therefore need to be analyzed to determine prevention and mitigation measures. This study examined land cover change, flood detection, and flood distribution using multitemporal Sentinel-1 and Landsat-8 satellite imagery in the Barito watershed. A combination of change detection and the application of the Otsu algorithm was used to detect floodplains from Sentinel-1 imagery. Land use/land cover (LULC) changes are detected using a combination of change detection and machine learning in the form of a random forest algorithm. The overlay technique was used to analyze the distribution of floodplains. In this study, the floodplain in the study area was mapped to 109,623 ha. The change detection method detects a decrease in the areas of primary forest, secondary forest, fields, rice fields, shrubs and ponds, respectively, by 13,020 ha, 116,235 ha, 259 ha, 146,696 ha, 47,308 ha, and 9,601 ha. Settlements, bare land, plantations and water bodies increase by 14,879 ha, 64,830 ha, 218,916 ha, and 34,768 ha, respectively. Flooding was mainly found in the classes of rice fields, water bodies and primary forests.
Co-Authors Adbizar Asmon Rizal Adindra Vickar Ega AGUSTINA RACHMAWARDANI Ahmad Fudholi Ahmad Fudholi Anisa Rarasati Anisa Rarasati Anjar Susatyo Anjar Susatyo Anwar Soefi Ibrahim Arief Sudarmaji Arief Sudarmaji ARSHASENA SOPAHELUWAKAN Bernadus H. S Budi Prawara Budi Prawara Chulafak, Galdita Aruba Dewi Maulidah Nur Anjani Duwi Hariyanto Ester Fatmawati Fajar Yulianto Fajar Yulianto Firliyani Rahmatia Ningsih Gatot Nugroho Gatot Nugroho Ghufron Zaid Joni Juli Handono Khomarudin, Muhammad Rokhis Kisna Pertiwi Kisna Pertiwi Melki Adi Kurniawan Mohamad Nur Yahya Mufidah, Zunanik Muhammad Arfin Hussein Muhammad Arfin Hussein Muhammad Priyatna Muhammad Priyatna Muhammad Priyatna, Muhammad Muhammad Rokhis Khomarudin Muhammad Rokhis Khomarudin Nuraini Rahma Hanifa Ocka Hedrony Paston Sidauruk Pingkan Mayestika Afgatiani Pingkan Mayestika Afgatiani Prawito Prawito PRAWITO PRAWITO Ratih Rundri Utami Ridwan Arief Subekti Ridwan Arief Subekti Sabar Sabar Tesa Apriyanti Tinton Dwi Atmaja Umiatin Umiatin Wibisono Wibisono