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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 16 Documents

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Search results for , issue "Vol 3 (2014)" : 16 Documents clear

KARAKTERISASI MINERAL PADA BATU GRANIT DI SEKITAR GUNUNG MARAPI DAERAH SUMATERA BARAT MENGGUNAKAN X-RAY DIFFRACTION (XRD) Abdil Bajili
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Rock is a collection of one or more minerals which also becomes the main ingredient in the formation of the earth’s crust. The rock contains of important mineral which are widely utilized by humans in daily life and also it can be the basic ingredients for sector industry. West Sumatra is also rich of the natural sources inside the rocks in mineral form. Which is used by Seismic Method, concluded that one of the compiler layers of rock that dominated the earth’s crust in West Sumatra is granite rock. Granite is included in the type of intrusive igneous rock that process of coagulating take place under the surface of the earth and it comes out because the eruption of volcano and the pressure in the earth. West Sumatra is the province which has many active volcanoes, one of them is Marapi Mountain. Around the Marapi Mountain much by passed by the Fault Sumatran. So that the research purpose to determine the characterization of minerals in the granite rock surrounding Marapi Mountain using X-Ray Diffraction (XRD) and explore in West Sumatra have. X-Ray Diffraction (XRD) is the method needed to analyze mineralogy of a rock sample. The result found in the measurement is that there are Orthoclase, Quartz, Albite, Magnetite, Thorite, Ilmenite, Hornblende, Kaolinite, Muscovite, and Sodalite. With the value of susceptibility is 4,1 x 10-5 m3/kg, the value of density is 2,54 gr/cm3 and compress straight granite is 12,56 MPa. Keywords: Rock, mineral, West Sumatra, Marapi Mountain, Granite rock, X-Ray Diffraction (XRD).

PEMBANGKIT GETARAN FREKUENSI RENDAH MENGGUNAKAN SENSOR OPTOCOUPLER Yoggy Refiyon
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Sensor is main component in measuring and controlling system. Somemany sensor using high technology in fabrication, like vibration sensor. It is making vibration sensor have high cost and rare. Because of that many researchers develop the vibration sensor, so that can ben get a sensor with low cost and good characteristic. To develop a vibration sensor with good characteristic needed a low frequency vibration generator as sensor calibrator. The goal of this research is knowing performance and design specification of low frequency vibration generator using optocoupler sensor. Kind of this research is laboratory experiment, and measurement technique and collecting data executed by directly and indirectly. Directly measurement is measuring output of sensor and time of count. Indirectly measurement is to determine accuration and precision of instrument. The data obtained through measurement analyzing in two methods, statics and graph. There are two result of this research, that are 1. Vibration generator that have two box casing( mechanical and electronic box), 2. Accuration of sensor is 94.4% with average of correctness 0.95477. Accuration average of vibration generator is 0.98 and the precision is 0.976. Keyword: vibration generator, low-frequency, seismic sensor, calibrator, optocopler counter

PENGARUH WAKTU SPIN COATING TERHADAP STRUKTUR DAN SIFAT LISTRIK SEL SURYA PEWARNATERSENSITASI Desi Susanthy
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Energy crisis that hit the world can be perceived by the people of Indonesia. Alternative solution to this problem needs to be done such as utilizing solar energy. Solar Cells Dyes sensitized is a device that converting solar energy to electrical energy by using the interaction of photons with the photosensitizer. Generally, the solar cell is composed of electrodes, dye, electrolyte, and semiconductors. In this research, Dye use mangosteen peel. The purpose of research is to determine the effect of film thickness on the electrical properties of the solar cell. Based on the results of measurements and data analysis, there are of research such as of spin coating. There are sereval result of research such as; first, varying thickness depending time of spin coating. Thickness of sample are 67.8 µm for 2 minutes, 66.1 µm for 4 minutes, 63.0 for 6 minutesand 59.6 µm for 8 minutes; second, absorbance value of dye with 338.17 nm wavelenght is 2.270; the last, the samples produce 20 µA current and 130 mV voltage for 67.8 µm film thickness, 500 µA and 213 mV for 66.1 µm, 18 µA and 15 mV for 63.0 µm and 12 µA current and 1.7 mV for 59.6 µm. Keywords: TiO2 thin film, method of spin coater, DSSC, natural dye, fotosentitizer.

PENGARUH PENAMBAHAN AQUADEST DAN AIR ACCU (H2SO4 30%) TERHADAP ARUS DAN TEGANGAN DARI SEL ACCU DENGAN MENGGUNAKAN AIR SINGKONG KARET (MANIHOT GLAZIOVII. M.A) Yuni Satria Ningsih
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The waste produced by the tapioca flour that made from Manihot glaziovii.M.A it is divide into two types, namely, solid waste and liquid waste. Solid waste can be used as organic fertilizer, but for liquid waste is not optimally utilized. Liquid waste is contain cyanide compounds by 8,27 mg/L that can generate electric current and potentially as an electrolyte solution. After that the writer analyze this research on liquid waste from Manihot glaziovii M.A water. The purpose of this research is to know the current and voltage value of the manihot glaziovii M.A with water that uses the cell battery. From this research the writer find the results obtained the value of current (I) and voltage (V) for each variation of the solution as follows: test solution to ASK for 1A; 3V, to ASK solution: Aq (70: 30 = 1A; 2 .6V), (65: 35 = 1A; 2, 4V), (60: 40 = 1A; 2, 2V) and ASK for a solution: Ac (70: 30 = 1A; 4, 4V), (65: 35 = 1A; 4, 7V), (60: 40 = 1A, 28V; 4). Water accu has (I) and (V) of 1A; .6V. Next on the measurement value of degree on acidity (pH) of the test solutionASK: Aq has a pH of 5, to ASK > pure pH = 4,69, while to ASK: Ac pH 3.5 <. I and V highest produced by ASK: air conditioning. So the results of this research is indicate that Manihot glaziovii.M.A has the potential as a solution of accu is more environmentally friendly and not harmful. Keywords: Manihot glaziovii M.A, Cell Accumulator, Current (I), Voltage (V), and pH

PENGARUH VARIASI KOMPOSISI PASIR POZZOLAND DAN PASIR ALAM TERHADAP KUAT TEKAN DAN KUAT LENTUR BATA RINGAN Hermila Hermila
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The purpose of this research is to investigate what is the variation of composition between pozzoland sand and natural sand as bricklayers light material that can result in compressive strength and flexural strength best. In this study, the method used is the experimental method, the independent variable in this study is a variation of composition pozzoland sand and natural sand sieve no.8 bricklayers light. The making of sample is done by testing the compressive strength and flexural strength from the age of 14 days, 21 days, and 28 days. From this research found the effect variations in composition pozzoland sand and natural sand in the manufacture of lightweight brick is the more variations in composition of pozzoland sand then natural sand, so compressive strength and flexural strength lightweight bricks produced is increasing, and the higher the age of light brick, so the compressive strength and strong bending is also increasing. It means the pozzoland sand greatly affect the compressive strength and flexural strength in a lightweight brick. Keywords: Sand pozzoland, natural sand, compressive strength, flexural strength, lightweight bricks

PENYELIDIKAN BIDANG GELINCIR MENGGUNAKAN METODA GEOLISTRIK TAHANAN JENIS KONFIGURASI SCHLUMBERGER DI DESA KAMPUNG MANGGIS KECAMATAN PADANG PANJANG BARAT Lismalini Lismalini
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The investigation of slip surface in Kampung Manggis Padang Panjang Barat has been done. The aim of this research is to know the shape of slip surface in that area. This research use resistivity geoelectrical method with Schlumberger configuration. Data are colected in four track which is made paralel by ARES (Automatic Resistivity meter). Processing of data was done using Res2Dinv v3.57 software with standard constraint least squares inversion in order to make 2D model of earth’s surface. The result of this research shows that slip sufrace is Translational Slip that is almost parallel with land surface. The resistivity values of first’s slip surface around 142.00-273.00 Ωm in 10.30 m deepness and the second one around 121.00–225.00 Ωm in 10.80 m deepness. The rock in slip surface is interpreted as Limestone. Keywords - Slip Surface, resistivity geoelectrical method, Schlumberger

IDENTIFIKASI MINERAL MAGNETIK PADA GUANO DI GUA BAU-BAU KALIMANTAN TIMUR MENGGUNAKAN SCANNING ELECTRON MICROSCOPE (SEM) Tauhida Amalia Sari
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Change of environment of a cave can be seen from the presence of magnetic minerals in guano. In this research the magnetic minerals identified a Guano in Bau-Bau caves, East Kalimantan. This research aim to look the morphology, elemental composition, the kind of magnetic minerals, and how magnetic minerals transport into the cave. Magnetic minerals in guano identified by using Scanning Electron Microscope (SEM) that completed with Energy Dispersive Spectroscope (EDS). The result showed the morphology of magnetic minerals of the guano is oval and have some cracks, in addition to the grain size of magnetic minerals is multidomain, guano elements are Fe, O, Ti , Si, C, N, and Br. To determine the kind of magnetic minerals using Proust's Law. The results of calculation the kind of magnetic minerals that can form Hematite (Fe2O3), Magnetite (Fe3O4), Ilmenite (FeTiO3) and Rutile (TiO2). This is indicates the magnetic grains estimated come from the external environment and during the rainy, transportation into the cave. Keywords: Change of environment, magnetic minerals, guano, SEM

PENGEMBANGAN ALAT UKUR SUHU UDARA DIGITAL BERBASIS MIKROKONTROLER ATMEGA32 MENGGUNAKAN SENSOR SHT75 Nofri Hardisal
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Temperature is important weather parameter measured for many necessity, such as agriculture, pharmacy, and etc. In Indonesian Agency of Meteorology, Climatology and Geophysical, this parameter measured by using analog termograph with mechanic sensor is bimetal sensor. The purpose of research is development of Dygital air temperature measurement based on microcontroller Atmega32 by using SHT75 sensor with storage data in memory possesed of highest accuration and already calibrated of dygital with storage data in memory. There are three result of research such as. First, instrument built from sensor SHT75 module as sensor of temperature and box of system have 22x21x16 cm volume as place of electronic circuit. Second, data logger of instrument used internal EEPROM in Microcontroller ATMEGA32. Third, this instrument have highest precision and accuration, average of precision relative sensor SHT75 is 98,93% with average of accuration 0,999. Keyword --- Alat Ukur, Suhu, Sensor SHT75

PENDAHULUAN JURNAL Cover Dewan Redaksi Daftar Isi
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

CoverDewan RedaksiDaftar Isi

PERHITUNGAN TINGKAT ENERGI SUMUR POTENSIAL KEADAAN TERIKAT MELALUI PERSAMAAN SCHRODINGER MENGGUNAKAN METODE BEDA HINGGA Hanifah Rahmayani
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Schrodinger equations are widely used in solving a variety of problems, one of them is particles in a box in especially of potential wells bound state. Particle in a box is a discrete circumstances, so we must examined whether or not the degeneration of these particles. The Schrodinger equation analysed to get a form of modeling of energy levels and wave functions in potential wells of the circumstance used numerical method. We also can show energy level of each state from the model. The numerical approaches is finnite difference method using Matlab R2010 software. Numerical calculation shows k value. k1 and k3 gets from solution of cos equation, whereas k2 and k4 gets from solution of sin equation. The k value is used to know the energy level in potential wells. energy level model show wave fucntion. In potential well bound state, Energy level and wave functions be smaller when potential energy is high and it is high when potential when potential energy is small. When wide of potential well is smaller, energy level and wave function be smaller too. But there isn’t show energy level and wave function when wide of potential well is high. The shape of energy level and and wave function of particle in box.

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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

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