cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
Arjuna Subject : -
Articles 282 Documents
 3   4   5   6   7 
Pengiriman data hasil pengukuran parameter lingkungan menggunakan jaringan seluler dengan Raspberry Pi sebagai node Husen Nasrullah Armin; Isnain Gunadi; Catur Edi Widodo
Youngster Physics Journal Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1197.583 KB)

Abstract

In this research has built a data delivery system of environmental parameters from Raspberry Pi into a webserver database for monitoring temperature, humidity, and light intensity in realtime, which used two Raspberry Pi as the two sensor nodes. Data from measurement of temperature, humidity, and light intensity of the sensor node is transmitted into the webserver via the mobile network, then the data is stored in a MySQL database, then the data is displayed in the form of websites. Applications to display the information of temperature, humidity and light intensity are made in the form of web programming with PHP and HTML discussed. With the appearance of the web is expected to facilitate the users to access through related information anywhere and anytime with the terms connected to the network internet. from this study, obtained results Raspberry Pi is able to transmit the observed data well into the webserver with a minimum data transmission delay of 1 second and 12 second maximum delay for a sensor node-1 and minimum delivery delays 1 second and 13 second maximum delay for sensor node-2.Keywords : Raspberry Pi , webserver, PHP, MySQL
PENENTUAN NILAI KOEFISIEN SERAPAN BAHAN DAN DOSIS RADIASI PADA VARIASI KOMBINASI KAYU DAN ALUMINIUM Andri Yanyah; Heri Sutanto
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.942 KB)

Abstract

In testing the material absorption coefficient of lead Pb, teak, ironwood and aluminum: The X-ray unit is set at a fixed voltage, current and time on the conditions of 81 kV and 32 mAs. The distance between the tube to the object as far as 100 cm, Multi Purpose Detector (MPD) is placed under the object, size of field radiation is 5 cm x 5 cm, the center beam is placed right in the middle of the object, then do exposure for each thickness of lead Pb, teak, ironwood, aluminum, combination of aluminum and teak, then combination of ironwood with aluminum performed in sequence according to the variations thickness of the material.The results of material coefficient absorption testing for teak wood, ironwood and aluminum, showed the value of the absorption coefficient (μ) for teak 0,023 /mm, ironwood 0,031 /mm and aluminum 0,102 /mm. Equality results between teak, ironwood and aluminum to the lead Pb at thickness of 2 mm, teak wood 472 mm, ironwood 350 mm and for aluminum 102 mm. In thickness combination of 30 mm teak and 30 mm aluminum, absorbed dose that passes material is 0,042 mGy. For the thickness combination of 30 mm ironwood with 30 mm aluminum, the absorbed dose that passes through the material is 0,035 mGy. To be equal with the lead Pb at 1,3 mm thickness, each material has very far equality value due to the thickness of 1,3 mm Pb can absorb dose that passes through the material equal with 0,001 mGy. Keywords: X-ray mobile, Multi Purpose Detector (MPD), Absorption Coefficient (), Pb, Jati, Ulin, Aluminium
Identifikasi sesar daerah rawan longsor Jabungan Semarang menggunakan data anomali udara bebas (Riset Pendahuluan) Rina Dwi Indriana
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1055.251 KB)

Abstract

< align="justify">Geophysical research has been done in Jabungan, Banyumanik, Semarang with the objective is to map the fault in the Jabungan area. Jabungan area is an area prone to landslides, several landslide events occurred in the area. From the existing geological map indicated some fault, which predicted in the Jabungan area. Several surveys of geophysical methods were done in the Jabungan area to examine landslide and fault as a disaster environmental study. One of the geophysical methods used is the gravity method. With this method can be obtained fault trend, depth and thickness. This survey is a preliminary survey to map the fault trend. This premilinary survey was done with an area of 2 km x 3,5 km. Results of premilinary survey is a trending fault pattern northwest northwest. For further analysis, data acquisition and area of research should be added.Keywords: fault, gravity, Jabungan
SINTESIS DAN KARAKTERISASI PIGMEN HEMATIT (α-Fe2O3) DARI BIJIH BESI ALAM MELALUI METODE PRESIPITASI Kukuh Dwi Septiana; Priyono Priyono; Nurul Taufiqu Rochman; Yuswono Yuswono; Tito Prastyo Rahman; Dwi Wahyu Nugroho; Radyum Ikono; Nofrizal Nofrizal; Nurwenda Novan Maulana
Youngster Physics Journal Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.652 KB)

Abstract

Indonesia has a lot of mining material of iron ore that could be used for various purposes in the steel industry or for pigment manufacturing. This research, has synthesized the Hematite (α-Fe2O3) pigment manufacture through a precipitation mechanism. The iron ore powder is mixed with HCl and NH4OH, then it is dried at a temperature of 150oC and calcinated at a temperature of 500oC and 800oC for knowing the formation temperature of  α-Fe2O3 crystal’s structure. Next, the synthesis results are characterized with XRD at 2θ from 10o to 80o with a sampling pitch of 0,02o. Synthesis results show that the raw material has a lattice parameter values a = b = 5,017 Ǻ and c = 13,652 Ǻ after purifying, the values of lattice parameter become a = b = 5,030 Ǻ and c = 13,739 Ǻ which appropriate with standard of ICDD No. 33-0664. The crystallite size is at range of 40 nm while the lattice strain at 1,700 x 10-4 to 3,500 x 10-4. The results of the color test indicate calcination value L * a * b * = 28,36, 27,86, 30,24 at temperature of 500oC where as at 800oC of the calcination temperature obtain values L * a * b * = 20,47, 22,42, 18,17.Keywords: iron ore, pigments, α-Fe2O3, precipitation
KARAKTERISASI PLASMA JET ARGON MENGGUNAKAN KOLOM DIELECTRIC BARRIER DISCHARGE (DBD) PADA TEKANAN ATMOSFER Andi Wibowo Kinandana; Muhammad Nur; Zaenul Muhlisin
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.857 KB)

Abstract

An atmospheric of Argon plasma jet is generated with column dielectric barrier discharge high voltage alternating current. Characterization of Argon plasma jet is used to observe the effect of variations in the voltage (V) to the length of the plasma jet. Voltage (V) and current (I) were analyzed to identify its effect to the length of the plasma jet. In this study, Argon gas is passed through the capillary column by regulating the flow rate of gas. Then the voltageis being increased until the plasma jet can be seen. Voltage is used consecutively in the range 0 to 10,5 kV at flow rate of Argon gas is 3 L / min. The result shows that electrical current increase and then reach saturation condition by the increase of voltage. The increase of the length of the plasma jet were given by the increase of the applied voltage. This research indicates that the length of the plasma jet characteristics tends to increase. The value of the voltage is affects to the value length of the plasma jet.
Rancang Bangun Sistem Wireless Sensor Salinitas Model Kapasitif Nita Melinda; Suryono Suryono
Youngster Physics Journal Vol 7, No 2 (2018): Youngster Physics Journal April 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1145.77 KB)

Abstract

Salinity is a significant parameter expecially to maritime aspect, such as in aquaculture and offshore agriculture. In most of measuring salinity using manual method and this is not effective. Wireless sensor of salinity using capacitive method, can be used in measuring salinity. This system consists of detector devices which is salinity sensor, processor devices which is microcontroller, and comunication devices using WiFi network. Salinity sensor is made from parallel cylinder which works by utilizing the principle of capacitance. This affect is  the frequency change of output pulse of astable multivibrator circuit. The microcontroller count the output pulse of astable multivibrator using frequency counter program. Data acquisition is made from delphi program on RTU computer. The output pulse of astable multivibrator pass the characterization process and calibration process to produce salinity value. The salinity data is stored in MySQL database and transmitted using WiFi network. The CTU computer which has been connected to the same network can access the data of salinity measurement from RTU, via a specific web address. Based on the research, the range measurement of sensor is between 2 ppt until 20 ppt, with error sensor reading is 9.11 %,. The testing of data transmission system is done by comparing the data generated from RTU and data received by CTU. The result shows that there is an error value of sending data is 0%.  Keyword: Salinity, astable multifibrator, WiFi, capacitance, web
STUDI DISTRIBUSI TEMPERATUR PERMUKAAN DANGKAL, EMISI GAS KARBONDIOKSIDA DAN POLA ALIRAN FLUIDA UNTUK MENGKLARIFIKASI SISTEM PANAS BUMI DI DAERAH MANIFESTASI DIWAK-DEREKAN, JAWA TENGAH Imroatun Nikmah; Udi Harmoko
Youngster Physics Journal Vol 3, No 1 (2014): Youngster Physics Journal Januari 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (465.619 KB)

Abstract

The research on temperature, carbon dioxide emissions (CO2) and fluid flow has been done at the site of geothermal manifestations Diwak-Derekan by using three methods: shallow surface temperature method, emissions of carbon dioxide (CO2) and Advance Groundwater (water level). The purpose of this study is to determine the temperature distribution, the emission of carbon dioxide (CO2) and fluid flow in the area Diwak-Derekan to get a conceptual model of the geothermal system.The shallow surface temperature measurement, emissions of carbon dioxide (CO2) and water table at the site of geothermal manifestations Diwak-Derekan has done with maps and put them in a third compiles data on height topography data.The result of study, in the manifestation area obtained result distribution of shallow surface temperature is about 30,77 oC (Diwak) and 30,64 oC (Derekan) with emission of carbon dioxide (CO2) is about 9%. And for water level measurement indicates that the flow of shallow ground water is coming from the west location of manifestations and mixed with hydrothermal fluids which then turn up to the surface as hot springs.Keywords: shallow surface temperatures, emissions of carbon dioxide (CO2), ground water, geothermal.
SISTEM PENGUKURAN KEKASARAN PERMUKAAN DINDING SUMUR BETON MENGGUNAKAN ULTRASONIC RANGING DENGAN MEDIA PENYIMPANAN DATA LOGGER Vifaldi Agti; Suryono Suryono
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.189 KB)

Abstract

Research of the application of ultrasonics wave for measurements of level of surface roughness of wall of the well concrete have been done. This purpose of research is create sensor system and data acquisition ultrasonic ranging for measure surface roughness of wall of the well and create data logger system  which can store measurement results. This method  included  in  non  destructive  test  because  It’s  used  of secure  wave  spectrum  region  and  nocontact measurement system. In this research, ultrasonic pulse generator using microcontroller ATSAM3X8E and the ultrasonic transducer is work on frequency of 40kHz. The transducer emits ultrasonic pulses to the object via the transmitter and receive back the wave reflection on the receiver.  ultrasonic waves are transmitted through air media experience attenuation and reflected towards the object until received by the receiver. The object used as the measurement of roughness is wall of the well concrete, reasons for choosing this object is to minimize attenuation, thus increasing the reflection of ultrasonic waves. In the method of time-of-flight measurement is done by rotating transducer for scanning object using the DC motor. The measurement results is stored in a data logger using the SD Card. To get the surface roughness profile, the distance data obtained is calculated using standard deviation equation. Then obtained a deviation of the roughness profile, the lowest value is 0.255 cm, the highest score is 0.730 cm, and the average value is 0,495 cm.
SISTEM PENGUKURAN KADAR GAS SO2 SECARA JARAK JAUH UNTUK PEMANTAUAN PADA KAWASAN GUNUNG BERAPI Arlien Siswanti; Figur Humani; Agus Sulistiyo; Inayatul Inayah; Giga Verian Pratama; Jatmiko Endro Suseno
Youngster Physics Journal Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (627.327 KB)

Abstract

When a forest fire or volcanic eruption must be accompanied by the emergence of gases endanger human health. By utilizing SO2 gas sensor and telemetry system,they are effectively used for the benefit of monitoring gas levels affected areas. The method used  by a field study in Gedong Songo which is now in an active condition give off gases which are still not detected. Through SO2 gas senso gas levels that can be obtained gas levels is 3.57 ppm. All data obtained from sensors will be transmitted in real time to ground stations via the telemetry system. Results of SO2 gas concentration data transmission will be shown through the android app and then analyzed as a follow up of disaster management.Keywords: Disaster, Quadcopter, gas sensors, Telemetry, Android.
ANALISIS TEKSTUR CITRA MIKROSKOPIS KANKER PARU MENGGUNAKAN METODE GRAY LEVEL CO-OCCURANCE MATRIX (GLCM) DAN TRANFORMASI WAVELET DENGAN KLASIFIKASI NAIVE BAYES Rizky Ayomi Syifa; Kusworo Adi; 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.166 KB)

Abstract

This research, conduct the lung cancer detection system on a microscopic image. The microscopic image used is the result from lung biopsy. If there is a cancerous tissue in the image of lung biopsy, the texture will be irregular, while the image of the normal lung biopsy will have a regular texture. The purpose of this reserach is to develope the lung cancer detection system and also to count the performance of the lung cancer detection system. The clasification process uses two methods, Gray Level Co-Occurance Matrix (GLCM) and Daubechies Wavelet Transform (db1). The Daubechies wavelet transformation is used in decomposition in level 4, while the offset of GLCM is 6. The feature extraction process is done in the transformation wavelet using the 4 subbands, approximation, horizontal Detils coefficients, vertical Detil coefficients and diagonal Detil coefficients, and the the feature extraction of GLCM uses the contrast, correlation, homogenity and energi as the parameter. The naïve bayes classification requires 2 parameter input, do a classification is 4 combination from each method of feature extraction. The result of this research is to extent the level of accuracy for the extraction of the feature extraction in 71,42% wavelet transformation method for the combination coefficients approximation-diagonal Detil coefficients and 80% accuration of GLCM method for the combination of homogeneity-correlation.

Page 5 of 29 | Total Record : 282

 3   4   5   6   7 

Filter by Year

2012 2018


Reset
Filter By Issues
All Issue Vol 7, No 2 (2018): Youngster Physics Journal April 2018 Vol 7, No 1 (2018): Youngster Physics Journal Januari 2018 Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017 Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017 Vol 6, No 2 (2017): Youngster Physics Journal April 2017 Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017 Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016 Vol 5, No 3 (2016): Youngster Physics Journal Juli 2016 Vol 5, No 2 (2016): Youngster Physics Journal April 2016 Vol 5, No 1 (2016): Youngster Physics Journal Januari 2016 Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015 Vol 4, No 3 (2015): Youngster Physics Journal Juli 2015 Vol 4, No 2 (2015): Youngster Physics Journal April 2015 Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015 Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014 Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014 Vol 3, No 2 (2014): Youngster Physics Journal April 2014 Vol 3, No 1 (2014): Youngster Physics Journal Januari 2014 Vol 2, No 4 (2013): Youngster Physics Journal Oktober 2013 Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013 Vol 2, No 2 (2013): Youngster Physics Journal April 2013 Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012 More Issue