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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
Arjuna Subject : -
Articles 282 Documents
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Simulator input-output sistem kontrol menggunakan Raspberry Pi Zainal Bachrudin; Catur Edi Widodo; Kusworo Adi
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In this research has been made I / O simulator which is a tool to simulate input and output of a control system using Raspberry Pi. Raspberry Pi has 26 GPIO (General Purpose Input and Output) pins that can be used to control inputs and outputs on the I / O simulator. The 26 GPIO pins are divided into two main systems, is 13 GPIO pins that are odd numbered as inputs and 13 other GPIO pins which are even numbered as outputs. The Raspberry Pi GPIO pins are ordered as inputs and outputs using Python programming languages. The command is done by reading the switch as input signal input, then Raspberry Pi process the input signal and send data as output signal with LED flame on the I / O Simulator. The I / O simulator can simulate logic gates, as AND, OR, NOT, and ADD, and can run mini distillation plant.Keywords: Simulation, Input-Output, Raspberry Pi, Python
ANALISIS ENTRANCE SURFACE EXPOSURE (ESE) DAN KUALITAS RADIOGRAF PHANTOM SEBAGAI PARAMETER KENDALI MUTU PADA PESAWAT MAMOGRAFI Erna Mariani; Eko Hidayanto; Evi Setiawati
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

The Entrance Surface Exposure (ESE) and quality of radiograph phantom as part of a Quality Control (QC) were analyzed on mammography machine Hologic M-Series. This research aims to detemine ESE values on mammography machine and determining number of fibers, speck groups and masses on radiograf phantom as part of a Quality Control (QC).The ESE was measured by Multi Purpose Detector (MPD) over the range of kV from 20–27 kV kV for current time 90 mAs, 95 mAs, 100 mAs, and phantom radiograph was tested by CIRS model 015 phantom was exposed at 23 kV for current time 90 mAs, 95 mAs, 100 mAs. The ESE values by direct measurement ranged from 3,22 mGy to 10,86 mGy and The ESE values by calculation of backscatter factor ranged from 3,59 mGy to 11,73 mGy and phantom radiograph testing qualitatively the number of fibers, speck groups, and mass in over the range of tolerances are 4 for fibers, 3 for speck groups, and 3 for the masses. This results shown that the mammography machine is still good condition and proper to be used for clinical examination moreover the result of phantom radiograph can be read properly and can diagnose symptoms of abnormalities in breast tissue properly.Keywords: Entrance Surface Exposure (ESE), phantom radiograph, quality control, mammography machine, Multi Purpose Detector (MPD).
Kajian Penaikan pH dan Oksidasi Ozon terhadap Konsentrasi Phospat dan Deterjen dalam Air Limbah di Laboratorium Kesehatan Daerah Kabupaten Semarang Suhirman Suhirman; Nur Endah; Sulistyani Sulistyani; Muhammad Nur
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

One of human activity is health Laboratory which is it activity would produce waste water that can environment contaminate . Some of  substance that consisted in laboratory waste water are, phospat dan deterjent which is  contain Linear alkylbenzene sulfonate (LAS). These parameter should to be processed before lost upon to environment or river. The choice to ozone technology consideratly that this technology is good technology (no side effect), Cheap relativly, no wide area needed and more practically. The ozone tecnology that be chosen is Advance Oxidation Processes (AOP)  with altering pH waste water to pH 9. In this manner we hope produce more OH radical that have more higher potential oxidation than ozone elone. The aim of this research is: to study altering pH and ozone oxidation concerning consentration of phospat and deterjent waste water of Health Laboratory at Semarang regency. Research type was True eksperimen with desain Posttest-Only Control Design, laboratory scale.The yields after oxidation proces with ozone  was : rate value of phospat concentration was 3,62 ppm at 10 minutes, 3,45 ppm at 20 minutes, 3,35 ppm at 30 minutes and 3,28 ppm at 45 minutes.Rate value of LAS concentration was 0,21 ppm at 10 minutes, 0,17 ppm at 20 minutes, 0,14 ppm at 30 minutes and 0,17 ppm at 45 minutes..Analysis yield : there was not difference  about phospat consentration on pH altering and ozone oxidation (Sig. 0,965 > 0,05), there was not difference  about LAS consentration on pH altering and ozone oxidation  (Sig. 0,7890 > 0,05). Keyword : Advance Oxidation Proceses, Ammonia, Phospat, Linear alkyl Benzenesulfonat
IDENTIFIKASI LITOLOGI RESERVOIR BATUPASIR MENGGUNAKAN INVERSI IMPEDANSI ELASTIK DI LAPANGAN “D” PADA FORMASI TALANG AKAR DENGAN KEDALAMAN 2780 – 2805 METER, CEKUNGAN JAWA BARAT UTARA Dita Aprilina; Agus Setyawan; Mualimin Mualimin
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

Elastic Impedance (EI) inversion has been used to determine sandstone lithology distributions in “D” Field of Talang Akar Formation, North West Java Basin. The target zone was TAF-3-1 with depth 2780 m - 2805 m which located in Talang Akar Formation with litologies of sandstone and shale.            Sensitivity analysis is method to separation of sandstone and shale lithology between Elastic Impedance log and Gamma Ray log crossplot at the angle 0º-30º. Analysis at seismic data is inversion result analysis on vertical and to knowning the value of Elastic Impedance and inversion result analysis on horizontal to knowing the direction of sandstone reservoir lithology.            Result of Elastic Impedance inversion shows that sandstone reservoir lithology in target area TAF-3-1 layer have value of Elastic Impedance from 1314 g.m/cm3s - 1410 g.m/cm3s, which can be seen in the vertical cross section of Elastic Impedance. Lithology distribution in lateral showed that reservoir of sandstone in Northwest–Southeast of study area around of well TA-01.Keywords : Elastic impedance inversion, elastic impedance, sandstone, Talang Akar Formation
PENGUKURAN DISTRIBUSI DINAMIS KONSENTRASI GAS KARBON MONOKSIDA (CO) MENGGUNKANA WIRELESS SENSOR NETWORK Laela Meitasari; Suryono Suryono
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

Increasing population growth rate followed by pollution can cause carbon monoxide (CO). Carbon monoxide gas, including air pollution, then with the necessary monitoring devices for controlling the gas concentration CO gas in the environment. Tool made in the form of 5 points randomly distributed sensors to measure the concentration of CO gas. Measurements carried out safely which can be monitored in real time remotely using telemetry (remote measurement) with jarigan Wi-Fi. The minimum system microcontroller ATmega8535 to convert analog to digital data from the sensor. To respond to the physical symptoms of the changes in the concentration of CO gas used MQ-7 sensor utilizing as komuniksai UART serial and Wi-Fi as a data transmission. ADC value readings from the sensor MQ-7 converted into concentration values in the form ppm. Data that is sent over Wi-Fi will be acquired into a computer and stored in the database. Concentration of data processing in the form of a graph where the results of measurements carried out showed that the concentration changes which occur at any time change depending on the wind direction. If the value of the concentration is high, the colour is black, whereas if a low concentration is purple.
PENENTUAN STRUKTUR BAWAH PERMUKAAN DENGAN MENGGUNAKAN METODE SEISMIK REFRAKSI DI LAPANGAN PANAS BUMI DIWAK DAN DEREKAN, KECAMATAN BERGAS, KABUPATEN SEMARANG Saiful Nurul Hudha; Udi Harmoko; Sugeng Widada; Yusuf D.H; Gatot Yulianto; Sahid Sahid
Youngster Physics Journal Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

A research of refraction seismic methods in Diwak and Derekan village, Bergas district , Semarang regency , Central Java has been done on March 30, 2013 and August 27, 2013. This research in order to determination the subsurface structure of a geothermal field Diwak and Derekan with refraction method. In this aquisision data the travel time data was a distance function, with Geometrics Model ES-3000 seismic refraction instrument with 8 Geophones. Processing and interpretation data used Hagiwara method. Hagiwara method used value of delay time concept from travel time curve.This interpretation which resulted shows the subsurface lithology of the study area Diwak v1 obtained for the first layer of 297 – 412 m/s which we interpret as a layer of alluvium.  While v2 on both layers obtained a value of 471 – 697 m/s which we interpret as soil. This research is the penetration depth of 5.84 - 11.7 m . The results obtained in the field structure of the two bedding Derekan, v1 to the first layer of 546 - 1011 m/s which is interpreted as alluvium. While v2 on both layers obtained a value of 1081 - 1714 m/s are interpreted with clay .Penetration that can be recorded on the field at 0.75 – 9.16 m .Keywords: sub surface structure, seismic refraction, Hagiwara method, Diwak, Derekan
ANALISIS DOSIS PAPARAN RADIASI PADA INSTALASI RADIOLOGI DENTAL PANORAMIK Candra Ancila; Eko Hidayanto
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 the analysis of radiation dose exposure in panoramic dental radiology installations in Government General Hospital dr Kariadi Semarang, this study aims to identify and analyze the radiation dose received by workers and the general public and determine the effectiveness of radiation shielding in dental panoramic installations. Measurements were carrried out at the time of exposure using dental panoramic with surveymeter babyline. Measurements of doses exposure taken at the point operator station, waiting rooms and in the corridors employess and panoramic dental space, while measuring the effectiveness of radiation shielding in the door of the room and the operator station. Dose measurement result obtained in the operator station amounted 5,83 µSv/h, lounge area 2,4 µSv/h and at the corridor employees are not detected exposure dose when exposure using dental panoramic. For the effectiveness of radiation shielding door of the room is 12,24 % and in the operators station is 82,29 %. Can be concluded that the operator room and corridor employess fairly save from exposure to excessive radiation, while the lounge area has a value that approaches the dose limits. For radiation shielding door of the room is small and the effectiveness of the operator room is large.
STUDI ALIRAN FLUIDA MANIFESTASI PANAS BUMI DESA DIWAK DAN DESA DEREKAN, KECAMATAN BERGAS, KABUPATEN SEMARANG MENGGUNAKAN METODE TAHANAN JENIS 3D. Hotlan Simbolon; Udi Harmoko; Gatot Yulianto; Sugeng Widada; Yusuf D. H.; Sahid Sahid
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

This research use geolistric method that aims to analize the system of manifestation of fluida distribution geothermal on Diwak, Derekan Central Java, based on measurement of geolistric 3-D with pole - pole configuration, has been done. Data processing is performed using software Res3dinv and surfer which results in a horizontal and vertical cross-section. The results of the interpretation of 2D processed by software rockwork to obtain 3-D cross-section. The results showed that the measurement point 1, the direction of the fluid flow toward the east. Measurement point 2, the direction of flow of the fluid toward the northwest, the fluid flow direction to both of the points towards Lutung river. Keywords : Fluida, pole-pole konfiguration, Diwak, Derakan
Karakterisasi sistem pembangkit aliran elektrohidrodinamika lucutan korona positif berkonfigurasi elektroda kawat-bidang Sumariyah Sumariyah; Azzuma Hasna Azzulkha; Muhammad Nur; Zaenul Muhlisin
Youngster Physics Journal Vol 6, No 2 (2017): Youngster Physics Journal April 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The characterization of electrohidrodynamic flow generation system (EHD) has been performed utilizing positive corona discharge configured wire-plate electrode. In this study, the characteristics of the EHD flow generation system in the form of current characteristics as a function of voltage or I-V characteristics with fixed geometry factor, in the without of lubricating oil and with the lubricating oil. The fixed geometry factor was obtained from the radius of the fixed point (r) electrode with various the electrode distance (d). This research was conducted by using positive corona incandescent discharges with wire field electrode configuration. The wire electrode used is made of stainless steel having a length of 5 cm, with wire diameter 0.11 mm, 0.14 mm, 0.21 mm, 0.36 mm, and 0.38 mm. Electrode of field used in the form of circle with diameter 20 cm. Data collection system with variation of voltage, variation of electrode distance, and variation of wire electrode diameter used. Furthermore, data analysis of measurement results was carried out. From the result of characteristic research of EHD flow generator system in the form of current as a function of voltage shows that the increase of voltage is proportional to current increase. While the current as a function of geometry shows the value of the current flowing inversely proportional to the geometry factor of the electrode distance change.Keywords:electrohydrodinamic, ion wind, positive corona discharge 
APLIKASI METODE OTSU UNTUK IDENTIFIKASI BAKTERI TUBERKULOSIS SECARA OTOMATIS Nelly Mirnasari; Kusworo Adi
Youngster Physics Journal Vol 2, No 2 (2013): Youngster Physics Journal April 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis. In this research, Ziehl-Neelsen sputum image is used to identify TB bacteria. Image segmentation process is done by using Otsu auto-thresholding to split object from its background in the ZN-stain sputum sample image. Morphology operation is done toward the splitting result to obtain the value of compactness, metric, and eccentricity of each object in the image which later will be used as input for the Adaptive Neuro-Fuzzy Inference System (ANFIS) to be classified. Result of the research show that segmentation using Otsu method is capable to properly split the object expected as bacteria from its background. The network testing show that ANFIS architecture with gbellmf as membership function type will work properly if it has 2 MFs on each input with epoch of 40. Keywords: Tuberculosis, Ziehl-Neelsen (ZN) Stain, Otsu method, auto-thresholding, fuzzy, ANFIS.

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