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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 297 Documents

15 16 17 18 19

THE EFFECT OF HYDROPHOBIC CALCINATION TEMPERATURE VARIATION OF SILICA / POLYSTYRENE COMPOSITE (SiO2 / PS) ON THE DURABILITY OF SELF CLEANING MATERIALS Dila Juliawati; Ratnawulan Ratnawulan
PILLAR OF PHYSICS Vol 14, No 1 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/11369171074

Nature possesses functional architectural and surface characteristics. The functional surface is one of the surfaces of taro or lotus leaves which has water-repellent (hydrophobic) properties. Water repellency is the ability to form on surfaces that escape from water (such as glass, ceramics, etc.). The purpose of this study was to determine the resistance of the surface layer on the SiO2/PS layer which is expected to be used for self-cleaning applications using calcination temperatures of 30oC, 60oC, 90oC, 140oC and 180oC for 1 hour using a furnace. This research is a type of experimental research conducted at the Material Physics Laboratory of FMIPA and the FMIPA Chemistry Laboratory, Universitas Negeri Padang (UNP). This study uses a HEM-3D (High Energy Milling Ellipse-3D Mention) tool. The precursor was made by giving the composition of 0.5 grams of polystyrene (PS) and 0.2 grams of silica powder. Coating is done by using the spin coating method and giving the calcination temperature using a furnace. The results of this study were the variations in the calcination temperature of the SiO2 / PS composite hydrophobic on the resistance of the coating showed a change in the contact angle. Largest contact angles at temperatures of 60oC and for durability using contact angle tests with a distance of several days. The change in the contact angle decreases greatly, but the value of the contact angle is greatest at 60oC.

Fabrication of measuring tool for gear rotational speed using an inductive proximity sensor and an Arduino Uno microcontroller Elfi Susilawati; Yulkifli Yulkifli; Zulhendri Kamus
PILLAR OF PHYSICS Vol 10 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The development of science and technology (Science and Technology) always improved. Science and technology proven to provide convenience and benefits for humans as in the field of Physics, for example measurement of the Rotational speed. Rotational speed can be measured in two ways: manually and automatically. Automatic sensor-assisted system used to detect and monitor the speed of play. Sensors for this system is inductive proximity sensors npn LJ12A3-4-Z / BX type. The use of these sensors has not been widely used in general, so the design and realization of the system is done looking at technical data, specifications and sensor characteristics. The objective of the research is to know the performance specification and the design of the gear speed measuring instrument. This research is engineering research. Data collection is done directly and indirectly. Direct measurements are made by comparing the measurements and theoretical outcomes. Indirect measurements determine the precision and accuracy of the speed. The data obtained through measurement are statistically and graphically. Based on data analysis put forward two important sections. First, the measurement system performance specification using proximity sensor and arduino microcontroller UNO consist of DC motor there are 12 gear, near DC motor there is proximity sensor with 4 mm distance to gear, and box circuit. Design specifications of measuring instruments in the form of device sensitivity 8,015; Relative accuracy 0.97; 97% accuracy and 0.99 system accuracy

ESTIMASI KEDALAMAN BATUAN DASAR DI DESA KAMPUNG MANGGIS KECAMATAN PADANG PANJANG BARAT MENGGUNAKAN METODE INVERSI ROBUST 2D DATA GEOLISTRIK TAHANAN JENIS KONFIGURASI WENNER Basra Kurniawan
PILLAR OF PHYSICS Vol 3 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The aimed of this research are to determine the resistivity and the depth of basement rocks in Kampung Manggis Padang Panjang Barat area. The resistivity and the depth of basement rocks in Kampung Manggis are important to know to anticipate landslide caused excessive load on the surface of the earth. This research use resistivity geoelectrical method with Wenner configuration. The data of this research were taken four tracks using ARES (Automatic Resistivity). The data were processed using Res2Dinv v3,59 software with Robust 2D inversion to obtain a 2D cross-section beneath the earth’s surface. The result of this research showed that type of basement rock in Kampung Manggis Padang Panjang Barat is an igneous rock groups, namely Andesite. The resistivity of this Andesite is 170 – 790 Ωm. The depth of basement rocks below the earth’s surface varies, which generally more than 20 m deepness around Kampung Manggis Padang Panjang Barat area . Keywords – Basement Rocks, resistivity, Wenner, Robust 2D inversion

Cover, Dewan Redaksi, Daftar Isi Pendahulun Jurnal
PILLAR OF PHYSICS Vol 12, No 1 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Jurnal Pillar of Physics Vol. 12 No. 1, April 2019 memuat 11 artikel penelitian di bidang fisika antara lain fisika instrumentasi dan elektronika, fisika kebumian dan fisika material.

Study of groundwater pollution by leachate using the least-square smoothness-constraints inversion method geoelectric resistivity of configuration schlumberger in case study of final waste disposal (TPA) Air Dingin Yosi Permata Sari
PILLAR OF PHYSICS Vol 4 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The final processing place of waste that open,in generally result leachate. The leachate uncontrolled will leak everywhere, so that can affect condition of groundwater around the landfill. The aim of this research is to determine contaminantion of groundwater by leachate in that area. This research use resistivity geoelectrical method with Schlumberger configuration. Data are colected in four track by ARES (Automatic Resistivity meter). Data are interpreted by the Smoothness Constraints Least Squares inversion method to obtain models of 2D the earth's surface. The result of this research showed that there has been contamination of groundwater by leachate in Air Dingin landfilling. Groundwater contamination occurs on every track measurement, except on track 2. Contamination was identification in the depth of 5,00-23,30 m with resistivity value less 10 Ωm.

Rancang bangun set eksperimen kalorimeter digital dengan pengindera sensor termokopel dan load cell berbasis arduino uno (A design of experimental set with a thermocouple sensor and load cell sensing based on arduino uno) Mardiyah Noviyanti; - Hufri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

A calorimeter is a device used to determine heat capacity, specific heat capacity and latent heat capacity. Calorimeter needs to be developed in terms of temperature and mass measurements into digital measurements using thermocouple sensors and Load Cell sensors and Arduino Uno as microcontrollers. This research is included in engineering research. This study describes the performance specifications and design specifications of a digital calorimeter experiment set. Performance specifications describe the system functions of the experimental set builder, while design specifications explain the accuracy and accuracy of the tools. The measurement technique is done directly and indirectly. Direct measurements are made of temperature and mass, while indirect measurements are carried out by analyzing the accuracy and accuracy of the digital calorimeter experimental set. The sensors used are thermocouple sensors and Load Cell sensors. The percentage of accuracy of the temperature reading is 99.38% with a percentage error of 0.62%. At a temperature measurement of 30 ⁰C the percentage of accuracy was 99.57%. At a temperature measurement of 70 ° C, the percentage of measurement accuracy is 99.75%. At measuring 100⁰C, the percentage of measurement accuracy was 99.82%. The accuracy percentage of the mass reading is 99.46% with a percentage error of 0.54%. In the repeated measurements of the mass of the copper cube which has a mass of 59.6 grams, the percentage of measurement accuracy is 99.60%.

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 %

Identifikasi jenis batuan mengunakan metode geolistrik tahanan jenis konfigurasi wenner (Identification of rock types using the geoelectric resistivity method of the Wenner configuration ) Sendi Mutia; - Akmam; Harman Amir
PILLAR OF PHYSICS Vol 11, No 1 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The government of Padang has done the planning the development region construction . The region construction planning will be done in Kelurahan Balai Gadang. The construction is focused to the society residence. Hence, it is needed the knowledge about the various rocks under the surface for the design construction. The purpose of this research is to know the resistivity and kinds of rock arrangement under the surface. The research is a basic descriptive research. Measurement were made using the Geolistrik resistivity method of the wenner configuration.The wenner configuration has good vertical resolution so it is good to use for knowing rock types. The interpretation of the data was used Software Res2dinv to get resistivity and depth of rocks in 2D model cross section below the earth surface.The result of this research shows the kinds of resistivity in kelurahan balai gadang Kecamatan KotoTangah is line1 1,79 Ωm - 6020 Ωm ,line2 3,03 Ωm – 14.810 Ωm, line3 1,8 Ωm – 6747 Ωm, and line4 8,85 Ωm – 2490 Ωm. There are 5 kinds of arrangementrocks in Kelurahan Balai Gadang suck as Alluvium, Sandstone, Clay, Limestone and Andisite.

Cover, Editorial Team and Table of Content Cover Dewan Redaksi Daftar Isi
PILLAR OF PHYSICS Vol 4 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Cover, Editorial Team and Table of Content

Studi instrumen emisi debu tipe durag D-R 290 dalam menentukan karakteristik debu hasil pembakaran klinnker di Indarung V PT. Semen Padang (The study of the D-R 290 durag type dust emission instrument in determining the characteristics of dust from combustion clinics at Indarung V PT. Semen Padang ) Desti Liala Kurnia; - Asrizal; Zulhendri Kamus
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Information about the measurement of dust and processing of measurement data needs to be known. But the reality shows that the information on dust emission instruments and processing data is still lacking. With this basis, research on dust emission instruments and processing of measurement data needs to be done. The research method used in this study is a descriptive research method with a quantitative approach in which the object of research is an instrument of dust emissions. The procedure of this study is in accordance with the steps for descriptive research. The results of this study indicate that the average measurement results of dust emissions with an hourly measurement range still provide measurement results below the specified limit limit. The threshold is based of Environment Regulation LHK No. 19 of 2017 concerning emission quality standards for cement industry businesses and / or activities, namely 75 mg/Nm3. Measurement for 6 months with a weekly measurement range of 25 weeks, obtained an average value of the results of the measurement of dust density of 18.96 mg/Nm. Dust density is directly proportional to the level of translucency, the larger the dust density, the higher the translucency level will also be.

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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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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