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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 6 (2015)" : 16 Documents clear

Investigasi bidang gelincir di Jorong Koto Baru Nagari Aie Dingin Kabupaten Solok dengan metode geolistrik tahanan jenis konfigurasi schlumberger (Investigation of landsile slip surface in Jorong Koto Baru Nagari Aia Dingin, Solok Regency using the geoelectric resistivity method with the schlumberger configuration) - Nurhidayati; - Akmam; Harman Amir
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Investigation of landslide slip surface using geoelectrical resistivity method has been conducted at Jorong Koto Baru Nagari Aie Dingin Kabupaten Solok. The aim of this research is to know the shape of slip surface, depth of slip surface, and angle of slip surface. Data were collected by Automatic Resistivity Multielectrode in 4 lines with Schlumberger configuration. Interpretation of data was done with Robust Constraint Inversion. The result of this research shows that slip surface is Translation slip. The estimation result showed that the subsurface lithology on four path consist of Alluvium and Sands, Sandstone, Clay, Limestone and Granite. The slip surface is a clay layer on four path with resistivity value range from 66.1-90.25 Ωm, 70.45–90.8 Ωm and 67.05-100 Ωm. Depth of slip surface for one and three section was found are of 7.05 meter, and for two section was found are of 4.14 meters. Angles of slip surface are 21.74°, 19.94°, 21.85°, 17.46° and 17.13°

Analisa ukuran bulir mineral magnetik pada lindi tpa sampah kota padang menggunakan metoda Anhysteretic Remanent Magnetization (ARM) (Analysis of magnetic mineral grain size on leachate of Padang city waste landfill using the Anhysteretic Remanent Magnetization (ARM) method) Risaldi Putra; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Padang city has landfill located in Air Dingin Village Balai Gadang Koto Tangah Subdistrict of Padang. This landfill has some leachates that assumed there is seepage from leachate pond to the river and drain. The results observation present that the river is decomposed and its color is changed so it obliged to research about Pollutants of Landfill (TPA) Padang City Mineral Magnetic Basis. The purpose of the research is to determinate grain size and mineral magnetic domain in Leachates of Landfill (TPA) Padang City by using ARM (Anhysteretic Remanent Magnetization) Method. The samples research were 6 samples that taken from leachate pond, the river, and drain at landfill (TPA) area. Measuring instruments that utilized were Ekman Grab, Susceptibility Meter, Molsfin AF demagnetizer, PARM ( Partial Anhysteretic Remanent Magnetization) and Minispin Magnetometer. The data collection was analyzed by plotting the correlation between relative intensity (I/Io) and magnetic field by using Lowrie and Fuller Kurve Test as comparative kurve for measuring grain size and magnetic domain. The research results showed that grain size of leachate pond sample is about 6 μm up to 135 μm, whereas grain size of river and drain samples are about 110 μm up to 135 μm. Magnetic domain sample was obtained of the research result is pseudo single domain (PSD) and multi domain (MD). Grain size was obtained from river and drain sample bigger than grain size of leachate pond sample. Mineral magnetic of leachate pond is more disposed to PSD whereas mineral magnetic of river and drain is more disposed to MD. Based on the results, the river and drain samples are expected that it has contaminated mineral magnetic of leachate pond (anthropogenic)

Estimasi kedalaman batuan dasar menggunakan metode inversi robust 2-D data geolistrik tahanan jenis konfigurasi dipole dipole di Bukit Apit Puhun Kecamatan Guguk Panjang Kota Bukittinggi (The estimation of the depth of the bedrock uses a robust 2-D inversion method of resistivity geoelectric data with a dipole dipole configuration at Bukit Apit Puhun, Guguk Panjang District, Bukittinggi City) - Bavitra; - Akmam; Harman Amir
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Bukit Apit Puhun Bukittinggi area is located at Sianok fault zone. This area was potensially occur tectonic activity such as earthquakes. Tectonic activity could disturb the stability of the bedrock. The aim of this research was to determine the resistivity and to depth of basement bedrock in Bukit Apit Puhun Bukittinggi area. This research used Robust 2D inversion Geoelectrical data with Dipole-dipole configuration. The Data of this research were taken five track using ARES (Automatic Resistivitymeter). The data were processed and interpreted with using Robust 2D inversion. The result of this research showed that type of basement bedrock in Bukit Apit Puhun Guguk Panjang was an igneous groups, namely Andesite. Resistivity of Andesite bedrock were varies on the each track. The resistivy of Andesite was 352 Ωm – 7598 Ωm. Depht of Andesite bedrock were varies, which generally more than 30 meters deepness at Bukit Apit Puhun Bukittinggi area

Pengaruh variasi temperatur kalsinasi terhadap karakteristik kalsium karbonat (CaCO3) dalam cangkang keong sawah (Pila ampullacea) yang terdapat di Kabupaten Pasaman (The effect of calcination temperature variations on the characteristics of calcium carbonate (CaCO3) in the shells of rice field snails (Pila ampullacea) found in Pasaman Regency) Haryona Delvita; Djusmaini Djamas; - Ramli
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Snail paddy shells (Pila ampullacea) located in sub-discricts Simpang Alahan Mati Pasaman contain lots of calcium carbonate (CaCO3) that is widely utilized in the industry. On the research of test data was obtained in the form of deposits of calcium levels XRF shell snail paddy is 93,438%. Based on test data XRD is obtained that information due to the temperature of the calcination transformation phase aragonite to calcite phase. The rising temperature of calcination causes a change of the structure of CaCO3 from Hexagonal structure to Ortorhombik structure. The rising temperature of calcination, grain size CaCO3 anyone rise to a certain temperature and then decline, as the grain size increases from aragonite before dikalsinasi 83,872 nm became 106,302 nm dikalsinasi on temperature after 380 ̊C. While the phase of calcite have grain size on temperature 380 ̊C, 410 ̊C, 440 ̊C, 470 ̊C and 500 ̊C each 118,983 nm, 139,882 nm, 137,067 nm, 140,047 nm, and 63,533 nm

Pengaruh jenis kulit pisang dan variasi waktu fermentasi terhadap kelistrikan dari sel accu dengan menggunakan larutan kulit pisang (Effect of banana peel type and fermentation time variation on the electricity of battery cells using a banana peel solution) Yasni Novi Hendri; - Gusnedi; - Ratnawulan
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

One attempt to deal with the energy crisis is the search of alternative energy. Of organic materials as well as inorganic material potentially to serve as alternative energy. Among them, waste banana peels that can be used as a biobaterai. One way to make banana peels as the optimal biobaterai with he does study of electricity generated from biobaterai by making a banana peels as a solution of elektrolitnya using a container of accu. The purpose of this study was to investigate the influence of different types of banana peels and fermentation time variation against electricity from cells using aqueous acid to the skin of a banana. This research was conducted on variation of skin types of bananas (ambon, raja, kepok and mas) and variations of the fermentation time (48, 96, 144 and 189 hours). In this study obtained data current and voltage measurement results of accu by using a solution of banana peels. Based on data obtained optimal banana peels type to serve as biobaterai is ambon banana with the value of the voltage and the current volt 33.08 mA. The fermentation time for 192 hours has obtained value of current and voltage for aqueous banana peels ambon, kepok, King and mas in a row was 33.08 mA and 3.70 volt, 25 mA and 3.23 volt, 24.65 mA and 2.88 volt, and 24.26 mA and 3.02 volt. The length of time the fermentation lowers the pH value of the material. This is because the process of the activity of microorganisms in the materials that increased, so that the electron transfer process took place rapidly resulting in the voltage and current values are getting lar

Pengaruh variasi penambahan serbuk grafit dalam pasir terhadap konduktivitas listrik beton K-350 (Effect of variations in the addition of graphite powder in sand to the electrical conductivity of K-350 concrete) Fitri Anika; Djusmaini Djamas; - Ramli
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Concrete conductive using graphite powder as a conductive material has not been optimized in their use of construction materials. Therefore, be used graphite powder as an ingredient added in the sand for the manufacture of concrete that is conductive. So with the addition of graphite powder in the sand is expected to produce electrical conductivity in the concrete. This is caused by the addition of carbon (C) contained in graphite powder is able to conduct electricity through the cement paste and aggregate, thus increasing the electrical conductivity of concrete. Has been testing an electric conductivity in volume of concrete K-350 with the addition of graphite powder variation of 0%, 5%, 10%, 15% and 20% using the test method Four-Point Probe. Results of testing the value of the electrical conductivity in the volume of concrete for each successive age the age of 7 days is 0.0229 (Ω.m)-1, 0.0286 (Ω.m)-1, 0.0306 (Ω.m)-1, 0.0358 (Ω.m)-1, 0.0374 (Ω.m)-1. At the age of 14 days in a row is 0.0132 (Ω.m)-1, 0.0177 (Ω.m)-1, 0.0207 (Ω.m)-1, 0.0250 (Ω.m)-1, 0.0291 (Ω.m)-1. At the age of 21 days in a row is 0.0099 (Ω.m)-1, 0.0135 (Ω.m)-1, 0.0155 (Ω.m)-1, 0.0164 (Ω.m)-1, 0.0204 (Ω.m)-1. At the age of 28 days in a row is 0.0074 (Ω.m)-1, 0.0101 (Ω.m)-1, 0.0111 (Ω.m)-1, 0.0121 (Ω.m)-1, 0.0152 (Ω.m)-1. From this study it can be concluded that the addition of graphite powder variations can increase the value of the electrical conductivity in the volume of concrete K-350, but declined against the concrete. This is caused by the influence of water content owned concrete

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Home Page

OAI Link

Editorial Team

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Contact Name Syafriani

Contact Email syafri@fmipa.unp.ac.id

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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

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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