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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 15 Documents

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Search results for , issue "Vol 7 (2016)" : 15 Documents clear

Komputasi energi elektronik pembentukan kitosan dari kitin cangkang udang dan pengaruhnya akibat keberadaan logam berat Bayu Fernanda
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Shrimp waste in the form of skin, head and tail of a substance containing protein and chitin can be processed into chitosan which has many uses. Chitosan is obtained from chitin which is reacted with NaOH. Chitosan can be processed and used as an absorbent material heavy metals generated by industrial waste. Owned energy chitosan obtained by Ev 798,4. However kitosani formation process, and how the influence of the presence of heavy metals to the energy can not be explained. Based on that, the purpose of this study was to determine the change in potential energy and activation energy in the formation of chitosan and the influence of the presence of heavy metals to energy chitosan.This research was a theoretical study that uses CS software Chemoffice and winmopac to see the chitosan molecular electronics and pengruh heavy metals. Using this software obtained data such as the distance between molecules, molecular charge and potential energy at the time of formation of chitin chitosan reacted with NaOH. Then chitosan is reacted with heavy metals, from here will be visible effect of heavy metals on the energy chitosan

Pembuatan sistem untuk meratakan padi otomatis menggunakan remote control dan detector object Husnuli Karim
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Drying rice in Indonesia still uses conventional way. This drying process usually use the traditional tool. The weakness of this tool is pushed and pulled by human. A solution to solve this problem is to make an automatic system to flat th rice by using remote control and detector object. This system is completed by detector object sensor. The objective of this research is to determine performance specification and design specification of this system. This research design is engineering research. This engineering research is the research who applied the knowledge to make a design in some tool. Electronic circuit design of system is usually described in diagram block. This diagram block consist of transmitter, receiver, microcontroller, motor driver, DC motor, PING sensor, and buzzer. The physic quantities in this research was distance and frequency. Research of this research can be devided into two part. The specification design of system completed with remote control and PING sensor. This system made from wood that combine with tube plastic. This system has 1.3 m of lengt and 1 m of wide with 4 wheels and a thruster, the thruster power of motor can be pushed 5 kg mass of rice. PING sensor have 98.6 % of accuration and have 0.997 precission. The transmitter and receiver have frequency 25 MHz with relative accuration 92.529 % and precission 0.991. Remote control has an average range 16.99 m with precission 0.999. This system can flat the rise up to 5.93 m with relative accuration 0.9 and can flat the rice with thickness 1.15 with precission 0.95

Monitoring magnetik terhadap polusi kendaraan bermotor di Kota Padang Panjang (Magnetic monitoring of pollution due to vehicles in Padang Panjang City) Delta Perdana
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Air pollution caused by vehicle has reached alarm point basically in a big city caused by human activity such as industria process, vehicle emission, household trash burning and more another activity. Air Pollution caused by vehicle produced magnetic mineral that sourced from friction machine, corotion of vehicle machine and vehicle emission that from incomplete combustion, where tha source of pollution in form of fly ash, so that cause air pollution. Padang Panjang include areas vehicle pass so that must doing research about magnetic monitoring to pollution by vehicle in Padang Panjang city. Purpose of this research for determinethe air pollution caused vehicle. In this research taking 30 topsoil as sample.air pollution level can determined by using rock magnetism method that is Magnetic Suseptibility method. Suseptibility magnetic Method used to know concentration or magnetic suseptibility value that be contained in a sample. Magnetic susceptibility value be measured with using Bartington Susceptibility Meter MS2B type. Measurement made by mass suseptibility value. Suseptibility value can be determined pollution levels (high, medium, and low). Based on measurement obtainable average magnetic suseptibility value all of sample taking point sample include ranges 1133,3 x 10-8 m3/kg until 1263,9 x 10-8 m3kg-1, including high polluted category. Highest magnetic suseptibility value there in Ngalau villages which indicates high pollution levels. Judging from the distance measurements from a roadside in Padang Panjang, the highest susceptibility values are at a distance of 0 m from the roadside then 1 m and 2 m from the roadside

Karakterisasi jenis mineral magnetik sedimen Gua Di Gua Liang Luar Kabupaten Manggarai Barat Provinsi Nusa Tenggara Timur menggunakan metode X-Ray Diffraction (XRD) Daris Maradelta
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The investigation types of magnetic minerals cave sediment in Liang Luar Cave Kabupaten Manggarai Barat Provinsi Nusa Tenggara Timur using X-Ray Diffraction. The measurement results in the form of diffraction angle (2θ), the distance between the field (dhkl), diffraction intensity (I) and relative intensity. The analysis techniques have been used Hight Score Plus Software analysis and manually. The results of measurement data of cave sediment samples in Liang Luar Cave show that the cave sediment samples containing magnetic minerals. The type of magnetic minerals contained in the cave sediment samples are magnetite, hematite, maghemite, and ilmenite in the cave sediment samples LS11-C3. This indicates that the inconsistencies type of magnetic minerals in each layer of cave sediment in Liang Luar Cave Kabupaten Manggarai Barat Provinsi Nusa Tenggara Timur. While the grain size of magnetic minerals cave sediment samples in Liang Luar Cave is the single-domain (SD) with a size of ≤ 100 nm

Optimasi kecepatan putar pengadukan dan waktu pengadukan terhadap kualitas fisika biodiesel dari minyak kelapa Riny Andwika Simatupang
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Nowadays, the quantity of fuel in the nature almost depleted. This condition make us to find another alternate energy source as a solution of fuel limitation.Using the organic material like cocoa plant as a renewable fuel that is biodiesel, to replace the diesel. This research goal is to know the optimum point of velocity of stirrer and stirring duration so it could produce fine quality of biodiesel as alternative energy source. In this research, the free variable that applied to the mixer as stir velocity is 1050 rpm, 1100 rpm, 1200 rpm and stir duration is been done in 5, 10, 15, 20 and 25 minutes. For controlled variable like process temperature is 50◦C, with sedimentation time is 24 hours and using NaOH as catalyst Biodiesel that been produce from transesterification from coco oil, having viscosity point at 4.408 cSt, density at 872.995 kg/m3 and flashpoint > 100◦C. The condition obtain from stirrer that using speed 1100 rpm on 5 minutes as the stirring time

Pembuatan pemodelan sistem ground based synthetic aperture radar (GB-SAR) untuk aplikasi deteksi longsor (Making a ground based synthetic aperture radar (GB-SAR) system modeling for landslide detection applications) Fitri Diana
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Ground Based Synthetic Aperture Radar (GB-SAR) is used for monitoring the displacement of landslides. Arrangement geometry of GB-SAR depend on the local topography. Calculation parameters of Synthetic Aperture Radar (SAR) system and design of tools developed need to be assessed, so that, we get the key parameters for developing the GB-SAR system matching as needed. The purpose of this research are to simulate the modeling of GB-SAR system towards the target area and resulted in the formulation of the reduction in SAR system and geometry of the illustration geometry of GB-SAR system. In general, appearance this modeling consists of two parts which are an application program and graphic modeling. GB-SAR modeling is developed based on software GUI Matlab. Variables in this research are slope hill angle, a distance of sensor to the target and bandwidth. The results of this research consists of three parts, namely the results of the formulation parameters GB-SAR geometry which are slant range center, maximum and minimum slant range, ground swath, image size, n synthetic aperture length, the next result is shape modeling GB-SAR system, and the relation between of each parameter. GB-SAR system modeling suggests that the relation between distance to the slant range and ground swath is linear proportional, while the slope hill angle is inversely proportional. In other side Relation of ground resolution with bandwidth is inversely proportional and relation ground swath with slope hill angle is linear proportional

Identifikasi mineral magnetik menggunakan metoda X-Ray Diffraction (XRD) Terhadap Polusi di Kota Padang Catur Krisna Gobah
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Many industrial processes such as the production of steel and cement, generate airborne magnetic material. That Particle to contained organized as magnetic mineral included kind of iron sulfide mineral and iron titanium sulfide. Industrial process using as a power plant in that process. Before being burned, coal is essentially nonmagnetic. The process of combustion causes the pyrite present dissociate and form pyrrhotite and sulfur gas. Above about 1350 K, pyrrhotite decomposes into sulfur and iron. Spherical iron particles are formed and subsequently oxidize to magnetite. This research intent on determine level of pollution and kind of magnetic mineral in a pollutant of padang city by undertaking measuring value of magnetic suseptibilty. By assume topsoil as a pollutant collector, so making use topsoil as a sample in this research. Measuring value of magnetic suseptibility by using magnetic suseptibilitymeter . Then identification kind of magnetic mineral by using a X-Ray Diffractometer (XRD). Data prosessing output of XRD organized as chart for know the kind of magnetic mineral. Data output from measuring value of magnetic suseptibility for know the pollution levels. Result of this research magnetic mineral has present in the Padang city magnetite is a big part. Hematite is a other mineral magnetic omly one sample contained that magnetic mineral just in sample KTT 06this sample taking at Lubuk Buaya, Koto Tangah subdistrict.

Antena array beam steering untuk sensor synthetic aperture radar (SAR) pada unmanned aerial vehicle (UAV) menggunakan software IE3D Herli Mia Haqu
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Sensor Synthetic Aperture Radar (SAR) work using the side looking of the system that is useful to distinguish the signal reflections from the left side or the right side at the same distance from the surface of the object or target. SAR sensors are taken using Unmanned Aerial Vehicle (UAV) and mounted on one side of the plane that caused the UAV requires a load balancer. One way to overcome this is to install the antenna under the fuselage, the radiation to be emitted toward the side known as beam steering antenna techniques. This study simulates the design of the antenna array to determine the influence of the dimensions of the antenna on the characteristics of the antenna array. Simulations carried out by varying the length and width of the feeding patch antenna array. The influence of the dimensions antenna on the antenna characteristics are used as a reference in determining the dimensions of the antenna array beam steering antenna characteristics for SAR sensors on the UAV. The software is used in this simulation software IE3D with the type of substrate pillar packing (NPC-H220A) having a dielectric constant of 2.17, thickness of 3.2 mm and a loss δ = 0.0005. Results of this research showed that the greater the length of the patch then it works the lower frequencies and viceversa. While wide-feeding affect the size of the antenna input impedance of the greater width of feeding the input impedance greater viceversa. Based on simulation results that have been done of the obtained reflection coefficient -18.01 dB antenna beam steering with 20° at a frequency of 1.270 GHz, the simulation results satisfy for the antenna of SAR sensors on the UAV

Pengaruh variasi ukuran partikel terhadap nilai konduktivitas termal papan partikel tongkol jagung Nanda Pratama
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Corncobs by most people still not optimally utilized, even considered as a waste byproduct of the primary production of maize. The content of lignocellulosic on corn cob allows for the manufacture of particle board by testing the thermal conductivity of which is expected later can be used as a heat insulator. The process of manufacture of particle board made with compression heat for 20 minutes with pressure of 160 Pa and temperature of 150 ° C, drying particle board for 15 days, density particle board 0.6x103 kg / m3 and thickness of particle board 1 cm.The results obtained for the thermal conductivity value of corncob particle board is greater mesh size, the smaller the size of its particles, the greater the thermal conductivity. From the results concluded that good particle board to serve as heat insulator materials are those that have low thermal conductivity values which qualify ukaran 8 mesh sieve amounted to 0.1012 W / m ° C. Increasingly smaller particle size makes thermal conductivity value increases so that the quality of heat insulator decreases

Pembuatan sistem pengukuran besaran gerak lurus berbasis personal komputer menggunakan sensor optocoupler Rani Humaira
PILLAR OF PHYSICS Vol 7 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Linier motion experiment is one of important experiment in physics because linear motion is basic motion which learned in the physics. The objective of this research is create a system of measuring linear motion parameters with good accuracy and precision and able to display data and graphics of linier motion parameters on personal computers using five HY860D optocoupler sensors with microcontroller Atmega 328 integrated on Arduino Uno board. There are three results of this research. First, the measurement system design consisting of five optocoupler sensor hang on a sensor pole with spacing between each sensor pole 50 cm, data of linier motion parameters which displayed on a computer include distance, time, average velocity and acceleration from each sensor and graphics show relation between distance and time, average velocity and time, acceleration and time. Second, the percentage of precision of time, average velocity, and acceleration for the measurement of uniform linear motion respectively 99.70 %, 99.91 %, and 100 %, percentage of precision of time, average velocity, and acceleration for the measurement of accelerated linier motion respectively 99.82 % , 86.18 % , and 98.70 %. Third, the average accuracy of time, average velocity and acceleration of uniform linear motion respectively 98.07%, 93.49 %, and 82.12 %, and average accuracy of time, average velocity and acceleration of the uniformly accelerated respectively 97.05 %, 98.22 %, and 90.04 %

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Home Page

OAI Link

Editorial Team

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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

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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