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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
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Articles 282 Documents
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Sistem Monitoring Kendaraan Secara 3D dengan Sensor Tekanan Udara dan Global Positioning System (GPS) Berbasis Web Secara Realtime Fatkhur Rohman; Jatmiko Endro Suseno; Catur Edi Widodo
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

A research on telemetry or remote measurement has been conduced, for the parameters of the position of a moving object, ie the vehicle. Parameters such as latitude and longitude position is obtained from the GPS receiver (Global Positioning System). GPS receiver is used Ublox Noe 6 M. In addition it’s also added a altitude parameter, which is obtained by converting the changes of air pressure. Sensor BMP180 used to measure air pressure. Both of these devices are read and controlled by a microcontroller ATmega328 with the Arduino software. The GPS receiver to get latitude and longitude coordinates from the satellite. Coodinates data is sent to a microcontroller, combined with altitide data, then data sent to the database server using internet with GSM network. In this system used web interface that allows users to monitor the position of the vehicle, without necessary for special receiving station. Based on the results of validation latitude and longitude coordinates from the GPS receiver, with GARMIN GPS devices with the GPSMAP 78s series, this GPS receiver has the highest standart deviation ± 0.000006 degrees for the longitude and ± 0.000012 for latitude. The position of the vehicle in form of latitude and longitude coordinates, then illustrated on Google Maps. The results of this study, acqusition system that has been mounted on the vehicle position coordinates can transmit data to the server, and the data transmission process becomes faster and cheaper. This system will continue sends the data for vehicles that are in the area covered by the GSM network provider. Lack of this system is data transmission medium that is highly dependent on the availability of the GSM network. If the GSM network is weak, it can cause failures in data transmission.
UJI IMAGE UNIFORMITY PERANGKAT COMPUTED RADIOGRAPHY DENGAN METODE PENGOLAHAN CITRA DIGITAL Arnefia Mei Yusnida; Suryono Suryono
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Image uniformity on Computed Radiography (CR) indicates the ability of photostimulable phosphor that contained in the imaging plate (IP) in generating value gray level at all points on the same exposure treatment. Image uniformity determine the image quality on radiological examination to be able to obtain accurate diagnostic information. Determination of image uniformity can be achieved by digital image processing. In this study, image uniformity tests performed using imaging plate size 35 x 35 with ID plate 9103073519. Imaging plate was exposured at 80 kV tube voltage and currents and the time variation of 40 mAs, 50 mAs and 60 mAs. Furthermore searched pixel values in the region of interest (ROI) which has been determined. Data from the test image is processed with Matlab software. The average deviation of each ROI pixel generated by the test images ranged between 0.17% -1.03% of the overall average. This value is still within the tolerance limit of 10% set by the AAPM, so the tapes were tested said to be unsuitable for use. Keywords: image uniformity, imaging plate, digital image, region of interest, deviation
Rancang bangun penghitung dan pengidentifikasi kendaraan menggunakan Multiple Object Tracking Laila Rahmawati; Kusworo Adi
Youngster Physics Journal Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Detection of a vehicle with a video camera is one accurate technology for detecting vehicles efficiently and can be used for large-scale data collection. This study has been conducted implementation of counters and  identifiers vehicles on the highway using multiple object tracking. The system uses an algorithm Gaussian mixture models and Kalman filter to detect and track the position, speed, direction of motion and size of vehicles from time to time in each image frame. The process of counting and identifying the vehicle consists of several stages of image acquisition, object detection using a Gaussian mixture models, morphology, object tracking using a Kalman filter and counting as well as the identification of the vehicle. The results of system performance is obtained by calculating the value of accuracy. Best performance results from the system counters and identifiers of vehicles on the highway using multiple object tracking obtained by the time of the morning and the worst at night. The results of the performance measurement system and vehicle identifiers using multiple object tracking accuracy of the results obtained on the morning of 94%, by 90% during the day, in the afternoon by 85%, and the evenings of 59%.Keywords: Counters and vehicle identifiers, multiple object tracking, Gaussian mixture models, Kalman Filter
PENGHITUNGAN OTOMATIS JUMLAH SEL DARAH MERAH DAN IDENTIFIKASI FASE PLASMODIUM FALCIPARUM MENGGUNAKAN OPERASI MORFOLOGI Adi Pamungkas; Kusworo Adi; Choirul Anam
Youngster Physics Journal Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Malaria disease still a public health issue in Indonesia. The incidence of malaria in Indonesia is increasing every year. The cause of malaria is a parasite of the genus plasmodium that infected red blood cells through the bite of Anopheles mosquitoes. One of plasmodium type that often the cause of malaria in Indonesia is the plasmodium falciparum. This type of plasmodium causes malignant tertian malaria which threatening for the sufferer’s life. This study’s function is to design a program that capable automatically to calculate the total number of red blood cells, the number of parasites, and identified the plasmodium falciparum phase. The image processing of red blood cells in digital using morphological operations. The results of the testing program has been designed showed the correlation coefficient for counting the total number of red blood cells is 0.997, the validation value for parasit counting is 87.5%, and validation value for phase identification of plasmodium falciparum is 87.5%. Key words : red blood cell, falciparum, calculation, identification, automatic http://ejournal-s1.undip.ac.id/index.php/bfd/article/view/63
ANALISA PRESERVASI AMPLITUDO DAN RESOLUSI SEISMIK PADA DATA HASIL RECONVOLUTION LAPANGAN “X” CEKUNGAN SUMATERA TENGAH Agus Muhidin; Udi Harmoko; Hernowo Danusaputro; Moh. Irfan Saputra Haris
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Structure interpretation of post-stack seismic data to delineate lithology boundary sometimes face difficulties in tracking reflector continuity, this is due to limitation of vertical resolution. Reconvolution method has been applied to fix vertical seismic resolution. In order to validate the function reconvolution to amplitude related interpretation, amplitude variation with offset (AVO) has applied to geology model.Reconvolution method was applied by increasing dominant frequency of seismic data and capable to minimize tuning thickness zone of geology model has been made. Modeling geology based on average of P velocity, S velocity, and density from field “X” well data and estimating P velocity, S velocity and density for fluid condition of reservoir. AVO analysis has been applied to validate how far reconvolution method capable to maintain amplitude behavior, AVO analysis using Zeoppritz equation in 10 to 30 degree angle and using intercept attribute (A), gradient (B) and product (A*B). Reconvolution method has used 50 Hz, 60 Hz, 65 Hz, and 70 Hz of wavelet.Reconvolution method capable to fix vertical seismic data resolution, it can be seen by decreasing of tuning thickness from 16 to 14 meters. Based on AVO analysis that be used for validate reconvolution method is showing intercept (A) and gradient (B) value be affected by fluids condition in reservoir and presence the random noise in the seismic data. Intercept (A) and gradient (B) for reconvolved data do not have significant changes. However, wavelet has used in reconvolution that possess the smallest error value is wavelet with dominant frequency in 60 Hz and 65 Hz. Keywords: Structure interpretation, Tuning thicknes, Recovolution, and AVO analysis
Aplikasi metode magnetik untuk identifikasi sebaran bijih besi di Kabupaten Solok Sumatera Barat Aufi Maslihah Umamii; Tony Yulianto; Dadan Dani Wardhana
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The aim of this research is to identify the subsurface structure in Solok West Sumatera by mapping the magnetic field. The measurement was made at 821 points in Solok, West Sumatra to obtain total magnetic field. Data processing was carried out by the daily variation correction and correction IGRF (International Geometric Reference Field) on magnetic field anomaly data to obtain the anomaly contour of total magnetic field.  Furthermore, the upward continuation process and reduction to pole process were applied to obtain the contour of local and regional anomaly. The result showed a pair of positive and negative closure which is then created a 2D model and 3D model using the software Geosoft Oasis Montaj. The 2D modeling showed that the subsurface structure with one of rock layer has a susceptibility of 0.185 and 0.196 cgs which is strongly suspected as iron ore mineral carrier rock. This rock layer is a unit of limestone derived from the Perem-age Barisan Formation. 3D modeling was used to calculate iron ore reserves in Solok, which is estimated to reach 1.414.579.375 ton.Keyword: magnetic field anomaly, susceptibility of rocks, iron ore, 2-D, 3-D.
EFEKTIVITAS RADIACWASH SEBAGAI DEKONTAMINAN Tc99m DAN I131 PADA PERMUKAAN DAERAH KERJA KEDOKTERAN NUKLIR M Rizqi Aditya Rahman; Eko Hidayanto; Rini Shintawati
Youngster Physics Journal Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Telah dilakukan penelitian dengan radiacwash sebagai bahan dekontaminan dari tumpahan Tc99mdan I131 pada tiga permukaan daerah kerja yaitu keramik, kaca dan vinyl untuk mengetahui efektivitas bahan dekontaminan radiacwash dan mengetahui bahan permukaan daerah kerja yang penurunan laju kontaminasinya paling cepat.Sumber Tc99mdan I131diteteskan pada ketiga permukaan, kemudian radiacwash diteteskan pada permukaan tersebut. Proses dekontaminasi dilakukan dengan teknik penyapuan memakai tissue. Laju kontaminasi diukur dengan alat monitor kontaminasi permukaan.Sampai tahap proses dekontaminasi kesepuluh, kontaminasi Tc99m pada bahan permukaan keramik 221,10 cpm, 96,03 cpm pada kaca dan 1713,69 cpm pada vinyl. Sementara untuk kontaminan I131, pada permukaan keramik 52,14 cpm, 38,94 cpm pada kaca dan 335,94 cpm pada vinyl. Dari hasil penelitian didapatkan bahwa pembersih radioaktif radiacwash lebih efektif untuk mengurangi kontaminan I131pada semua sampel permukaan daerah kerja. Selain itu didapatkan bahwa permukaan daerah kerja yang paling cepat mengurangi laju kontaminasi zat radioaktif adalah permukaan kaca.Kata kunci :dekontaminasi, Tc99m, I131, radiacwash
INTERPRETASI STRUKTUR BAWAH PERMUKAAN BERDASARKAN DATA GEOMAGNETIK PADA DAERAH MATA AIR PANAS JATIKURUNG KABUPATEN SEMARANG Laela Fitria; Tony Yulianto; Udi Harmoko
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The interpretation of subsurface structure and the identification of caused of the hot springs Jatikurung by using magnetic method have been successfully carried out. In this study, magnetic data acquisition was carried out in 71 points by using a PPM (Proton Precession Magnetometer) geometrics type of GSM 19T models to get the values of the total magnetic field. Data processing began with IGRF (International Geomagnetic Reference Field) correction and diurnal correction to get the total magnetic anomaly. The corrected data has been used to create total magnetic anomaly contour. The total magnetic anomaly contour has been used to process reduction to plan surface. The result of reduction to plan surface has been used to create a contour upward continuation and then made reduction to the poles. The result of research showed the total magnetic anomaly closure pair of positive and negative indicated a fault zone below the surface. The closure pair of positive and negative close to the manifestation was made an incision to determine the subsurface structure of the region by creating a model of 2-dimensional (2D) using software Mag2DC. In 2D modeling result show that there was a fault zone about 1200 meters depth. At a depth of 326 to 1200 meters was interpreted as a cap rock with a value 0.2926 (SI). The exhibition of the hot springs Jatikurung was interpreted by the finding of adjacent fault with igneous intrusion which was estimated to save the residual of magma that can be used as a heat source.
Aplikasi Metode Gravity Dengan Data Satelit Untuk Identifikasi Struktur Bawah Permukaan (Studi Kasus Semenanjung Muria) Hilda Ayu Noor Aulia Anisa; Rina Dwi Indriyana; Muhammad Irham
Youngster Physics Journal Vol 7, No 2 (2018): Youngster Physics Journal April 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Mass distribution beneath  Muria Peninsula was conducted with gravity methods to describe the subsurface mass distribution of the Muris peninsula. Anomalous data obtained from bgi.omp.obs. 3D modeling using Grablox and Bloxer software. 3D modeling results obtained five incisions consisting of two Eastern-directed incisions to the West, and three incisions pointing north to the South. The modeling results indicate a fault in the north of the study area and trails East to West, and a fault that extends over the Muria Mountain, north to south direction. Muria Basin with density of rock type 2.0 g / cc to 2.35 g / cc. The area is due to the sedia- tion of the muria peninsular, and the form of the continuous basin of Javanese anticlorium.Keywords: Gravity Method, density, gradient analysis, upward continuation, 3D modelling
ANALISIS KORELASI CITRA DATA PRIMER DENGAN DATA SEKUNDER MENGGUNAKAN CITRA GRID ANALYSIS AND DISPLAY SYSTEM (GrADS Wahyu Jatmiko; Rahmat Gernowo
Youngster Physics Journal Vol 3, No 1 (2014): Youngster Physics Journal Januari 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Indonesia has 13 (thirteen) the threat of catastrophic earthquakes, tsunamis, floods, landslides, volcanic eruptions, extreme waves and abrasion, extreme weather, drought, forest fires and land, buildings and residential fires, epidemics and disease outbreaks, failed technology, and social conflict. Research related to hydrometeorological predictable by doing a variety of approaches, one using remote sensing methods provided by the World Meteorological Organization (WMO) with the advantages of data is not affected by the location of the location such as the presence of a cliff, lake, or mountain.In the study image correlation analysis of primary data with secondary data using imagery Grid Analysis And Display System (Grads) have been analyzed the correlation between the image of the primary data with secondary data using Grid software image Analisys And Display System. The data used are rainfall, air temperature, and humidity, all of the data is the data on average monthly. Primary data were obtained from Badan Meteorologi, Klimatologi dan Geofisika (BMKG) Semarang and secondary data obtained by downloading from the National Oceanic And Atmospheric Administration (NOAA) website.The value of the correlation between the primary data with secondary data for rainfall data indicate a strong relationship , occurs when the amount of rainfall maximum correlation value is 0,67 and the value of correlation in the event the minimum rainfall is 0,79 . On air temperature data the value of the correlation time of maximum rainfall is 0.69 and the value of correlation in the event of rainfall minimum is -0,37 . Correlation values for air humidity data at the time of maximum precipitation is 0,01 and the magnitude of the correlation value at the time the minimum rainfall is 0,95 .Keywords : GrADS , disaster, correlation, extreme weather, dryness

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