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Pillar of Physics: Jurnal Berkala Ilmiah Fisika

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Published by Universitas Negeri Padang

ISSN : 23379030 EISSN : 26852608 DOI : http://dx.doi.org/10.24036/10741171074

Core Subject : Science,

Earth & Planetary Sciences Materials Science & Nanotechnology Physics

This journal publishes original articles on the latest issues and trends occurring internationally in: 1 Geophysics, 2 Electronics and Instrumentation, 3 Material Physics, (4) Computational Physics. Other topics are related to physics are most welcome.

Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)

Articles 7 Documents

Search results for , issue "Vol 9 (2017)" : 7 Documents clear

Fabrication of a 2.4 GHZ XBEE wireless communication system with sent data to support the measurement of the tipping vessel rainfall at the BMKG Sicincin Risa Noviarti; Asrizal Asrizal; Yohandri Yohandri
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Information of rainfall is required in agricalture to determine kind of plant wich is suitable planted in certain area. A rain gauge had used in BMKG Sicincin wastipping bucket raingauge model TB3-0.2 serial no.92-459. This rain gauge can not be used because its data loggeris damage. Based on reality, researcher was interested to give solution by making wireless communication XBee in this rain gauge for sending data to PC. The goal of this research is to explain performance and design specification of system. Kind of this research is engineering research. Measurement technique and collecting data was executed by directly and indirectly measurement. Directly measurement was used to measure output of sensor and time of count. Indirectly measurement was used to determine accuration and precision of rain gauge. The data was analysed by using descriptive statistic and graph method. Mechanic part of system consist of tube, funnel and tipping bucket , while electronic part of system consist of sensor circuit, microcontroler circuit, RTC circuit, transmitter circuit and receiver sircuit. Precision of rain gauge in laboratory testing is 0.86, its average of accuration is 0.93 andrelative precision data transmition is 1. Accuration ofrain gauge in field testingis 0.92

Analysis of seismic changes rate based on the seismotectonic spatial distribution of West Sumatra region Wela Yulianda; Syafriani Syafriani; Ardiyansyah Sabarani
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

West Sumatra has a high level of seismicity so as often rocked by significant earthquakes and caused damage. The earthquake is usually preceded by symptoms such as occurrence of a seismic Quiescence phenomenon. This phenomenon can be seen by observing seismic rate changes in a region. The observation used data from NEIC / USGS and ISC with time period from 22nd of September 1918 to 31st of October 2015. The method used to analyze the seismic rate changes is the z-value method. The study area is divided into several grids. Z-value of each grid is counted and will be spatially distributed so seismic rate change of West Sumatra can be analyzed. This analysis will show presence or absence of seismic Quiescence phenomenon before earthquake in West Sumatera. The observation result showed that there is a certain preceding phenomenon before the significant earthquake in 1943 (7.8 SR) and 2007 (7.8 SR) in West Sumatra. This phenomenon called seismic Quiescence can be used as earthquake precursor. At the beginning of 2015 showed the decrease in seismic activity in several regions in West Sumatra according to development of seismic activity data. It is suspected as early symptoms of impending significant earthquake in future

Study on tools and measuring results of wind speed using the agroclimate automatic weather station (AAWS) instrument at BMKG Sicincin Astuti Kirana Fachry; Zulhendri Kamus; Sugeng Nugroho
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Wind speed and direction is required data in agriculture. Wind speed and direction will usually help pollinate plants, but it can also be used for the determination of the future grow. One of the instrument used to determine wind speed and direction are AAWS (Agroclimate Automated Weather Station). This instrument is used to measure weather elements Unsu-one speed and direction of this AAWS angin.Pada for measuring the weather elements such as wind speed and direction using an ultrasonic anemometer. The wind data must first be processed and analyzed so that it becomes useful information, one result is a diagram windrose plot (WRPLOT). WRPLOT can perform calculations in generating wind rose diagrams and frequency distribution of wind data quickly so that the information resulting from the analysis of wind speed and direction to be more informative and interactive. From the analysis of the measurement data of wind speed and direction were performed using WRPLOT showed, that the wind speed in the morning with a range 2,1-3,6m / s blowing from the southwest. During the day the wind speed decreased to 0.5 to 2.1 m / s blowing from the northeast and east. While at night the average wind speed was 0.5 to 2.1 m / s blowing from the northeast and east as well.

Simulation of circular polarized microstrip antenna for circularly polarized - synthetic aperture radar (CP-SAR) Bastian Wahyudi; Asrizal Asrizal; Yohandri Yohandri
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Remote sensing technology is important to determine the geography information. Based on the sensor used, remote sensing can be divided into two types namely optical and radar. Radar-based remote sensing is more suitable for use in parts of Indonesia when compared to using an optical sensing, because of Indonesia has a large enough cloud cover. One type of radar sensor is a sensor Synthetic Aperture Radar (SAR). SAR sensors are generally operated in the linear polarization. When propagating in the ionosphere, micro wave with linear polarization will be disturbed by the effects of Faraday rotation. The impact of the effects of Faraday rotation can be reduced by emitting microwaves in circular polarization -CP. The signal quality of the CP can be described by a parameter called axial ratio. This study simulates antenna design to determine the effect of the dimensions of the antenna on the antenna characteristics. The simulation was performed by varying the length of the patch, the width of feeding and truncated junction on the patch antenna. Antenna dimension is obtained will be used as a reference in determining the dimensions of the antenna for the CP-SAR. The device used in this simulation is IE3D with the type of substrate pillar packing (NPC-H220A) with 2,17 dielectric constant of 3,2 mm thickness and loss δ = 0.0005. From the simulations, it can bestated two of research result. First, that the correlation between the length of the patch and the operating frequency of the antenna is comparable as well as the width of feeding and the input impedance. Second, the antenna dimensions are used to determine the model of the characteristics of the antenna for applications CP - SAR at 1,270 GHz operating frequency with a value of 50,54 Ω input impedance, VSWR of 1,053 and 1,1288 dB axial ratio

Analysis of weather elements based on measurement results of Automated Weather System (AWS) type Vaisala MAWS 201 Muhammad Ihsan Qudratullah; Asrizal Asrizal; Zulhendri Kamus
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Human activities due influenced by natural conditions and natural conditions are affected by human activities. This phenomenon is interesting because everybody couldn't control over the weather. Accuracy weather information can minimize the negative effects of weather such as aircraft accidents, material losses due to flooding and other. AWS is instrument used to measure the weather elements. However, in practice most of the weather forecast is only used to help smooth plane flight, and the result can only be accessed by certain institutions. In fact, if viewed more deeply the weather forecast has many benefits in human activities. This research objective is to determine the characteristics of the weather elements that can be utilized for various fields of human life. This research was descriptive which describe the AWS Vaisla MAWS 201 and the elements of the weather based on measurements using Vaisala MAWS 201. AWS measurement data retrieval was done directly by observing changes in weather elements occurring on the computer display. The computer display of measurement data elements of weather can be downloaded to be processed as information material. From these research activities could be offered two results. First AWS consist of remote terminal Unite (RTU), personal computer (CP), Sensors. AWS can measure some weather elements at once. Second, the measurement data obtained from the results that the average temperature in 2013 and 2014 was 250C -300C and minimum temperature of 240C. For the measurement of rainfall average per year is 35 mm and 0 mm. The air pressure value of the average per year is 1012 mb and 1009 mb. Air humidity is 80 and 82. Wind speed is taken from an annual average value of 10 m / s in 2014 and 3 m / s in 2013

Cover, Editorial Team and Table of Content Pendahuluan Jurnal
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Cover, Dewan Redaksi, Daftar Isi

Fabrication of a pressure gauge for the mosquito artery clamp based on the LJ12A3-4-Z / BX proximity sensor Novella Febriana; Yulkifli Yulkifli; Ratnawulan Ratnawulan
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

This research aims to design and develop a pressure gauge on the mosquito arterial clamp based on LJ12A3-4-Z/BX proximity sensor and to determine the performance specifications and proximity sensor-based equipment specifications LJ12A3-4-Z / BX. This study was engineering. The data collection done by measured the direct and indirect measurement.. Direct measurements carried out on proximity sensor output npn type LJ12A3-Z / BX, while indirect measurements carried out to determine the accuracy and precision of the instrument pressure gauge. The data obtained through the measurement was analyzed in two ways, namely by statistics and graphs. Based on data analysis that has been done can be put forward three important results. First, spesification of system performance pressure gauges at the arterial clamp LJ12A3 proximity sensor-based mosquito-Z / BX consists of a mosquito artery clamps connected by a proximity sensor type LJ12A3 npn-Z / BX and a box. Second, used to process the input data and processing data of sensor measurement data by the Arduino Uno microcontroller was. Third, this sensor has a sensor that outputs a value inversely proportional to the frequency of the pressure on the clamps are used, with the slope of 0.386. Meanwhile, the coefficient of determination obtained a straight line approach around 0.876. The resulting clamping pressure is inversely proportional to the value of the slope of the graph of No - 1,074. Through with the near of straight line coefficient of determination of the chart of 0726

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Syafriani

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+6281267996692

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fisikasains@fmipa.unp.ac.id

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Department of Physics Universitas Negeri Padang UNP Prof. Dr. Hamka Street, Air Tawar, Padang 25131

Location
Kota padang,

Sumatera barat

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Syafriani

Contact Email syafri@fmipa.unp.ac.id

Phone +6281267996692

Journal Mail Official fisikasains@fmipa.unp.ac.id

Editorial Address Department of Physics Universitas Negeri Padang UNP Prof. Dr. Hamka Street, Air Tawar, Padang 25131

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Syafriani

Contact Email
syafri@fmipa.unp.ac.id

Phone
+6281267996692

Journal Mail Official
fisikasains@fmipa.unp.ac.id

Editorial Address
Department of Physics Universitas Negeri Padang UNP Prof. Dr. Hamka Street, Air Tawar, Padang 25131

Location
Kota padang,

Sumatera barat

INDONESIA