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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

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Pembuatan alat ukur kedalaman air menggunakan sensor sonar (An instrument to measure the water depth using a sonar sensor) Citra Syefriana; - Yohandri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Technological developments in various fields encourage humans to apply technology, including in fields related to water. The community uses the river as one of the infrastructure of water transportation, tourism, fisheries and trade. So that the depth of the waters is one of the important factors in the activities of the population, especially in relation to river utilization. a sensor that can detect water depth is a sonar sensor using Aquino as a micro controller sends via the HC-05 Bluetooth module and displays on Android via Bluetooth after installing an electronic Bluetooth application. This research is a study that explains the design and performance specifications. Design specifications explain the accuracy and distance accuracy, while performance specifications explain the performance of measuring instruments. The measurement technique used is direct and indirect measurement. Direct measurements carry out by comparing data using standard gauges and water depth meters. Whereas indirect measurement by analyzing the accuracy and accuracy of distance. Based on the results of the research that has been done of the accuracy, an obtained fairly good distance with an average percentage of 99,37% relative accuracy, an average relative error of 0,63%. The accuracy of the distance was taken 118 cm to, in the largest relative error percentage of 0,42% and an average accuracy of 99,58%. While The accuracy of the distance was taken 206 cm to, in the largest relative error of 0,97% and an average accuracy of 99,61%.

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

Cover, Editorial Team and Table of Content Pendahuluan Jurnal
PILLAR OF PHYSICS Vol 10 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Cover, Editorial Team and Table of Content

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

Pemetaan bahaya gempabumi deterministik dengan pendekatan Peak Ground Acceleration (PGA) di Kota Padang (Mapping of deterministic earthquake hazards using the Peak Ground Acceleration (PGA) approach in the city of Padang ) Zaimi Netrisa; - Syafriani; Rahmat Triyono; Hamdi Arifin
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Indonesia is passed by three plates of the E urasia plate, the Indo-Australin plate and the Pasific plate. Along the west of Sumatera, south of Java, south of Nusa Tenggara, ending in the Banda Sea, the Eurasia plate and Indo-Australian plate, the Eurasia plate and the Pasific plate in the Maluku Sea and ending in the Banda Sea. West Sumatra’s mainland section has occurred a significant and damaging earthquake of 6time. The city of Padang is adjecent to the Indo-Australian plate meeting and the Eurasian Plate. DSHA method basically aims to develop an earthquake scenario that is determined by the distance ang magnitude that affect the location. The resulting ground vibration with the predetermined earthquake event parameters is than calculated using the attenuation equation in some cases. DSHA has a basic concept to determine the ground motion parameters by using the maximum earthquake magnitude and distance of earthquake source closest from the point of obsevation. Based on the mapping results on th map of Padang City has the level of prone divided into three categories of danger that is small, medium and large denger and soil conditions are soft, medium and hard. Minor hazard are in BRI, SMO dan ADS. The danger is in Lap.Imam Bonjol, GOV and Kampung Cina and great danger of being in GOR,UNP, APT, SRC, ORG and CMN. The PGA value is proportional to the differene in soil. The greater the value of PGA then the greater the intensity caused by the earthquake. In this study instead,

Determination of basic rock depth using Marquardt inversion based on schlumberger configuration geolistric resistivity data in Kampung Manggis village, Padang Panjang Barat Herawati Herawati
PILLAR OF PHYSICS Vol 4 (2014)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The purpose of this basic research are to describe the resistivity and the depth of basement rocks in Kampung Manggis Padang Panjang Barat. The depth of basement rocks are important to anticipate the landslide in the research area. This research use the exploration methods. The measurement use resistivity geoelectrical method with Schlumberger configuration. The techniques of analysis data use Marquardt inversion with initial damping factor 0,1 and minimum damping factor 0,001. The analysis of the data generating 2D cross section below the earth surface. The interpretation of the data generating the depth and the types of basement rocks. The result of this research show the type of basement rocks in Kampung Manggis Padang Panjang Barat is an igneous rock groups, namely Andesite. The resistivity of this andesite is 170,1–1658 Ωm. The depth of basement rocks below the earth surface varies, which generally more than 8 m deepness around Kampung Manggis Padang Panjang Barat area

Analisis anomali ketinggian semu (h'F) lapisan ionosfer sebagai prekursor gempa bumi sumatera (Analysis of the pseudo height anomaly (h'F) of the ionosphere as a precursor to the Sumatran earthquake) Ilham Akbar; - Syafriani; Muslim Buldan; - Afrizal
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Sumatra is an area prone to earthquakes, this is caused by a complex Sumatran tectonic system. Therefore, research is needed that aims to determine earthquake precursors as a disaster mitigation effort based on anomalies that occur in the ionosphere by observing pseudo anomalies (h’F) of the ionosphere before the earthquake. The research is a descriptive study by analyzing the ionosphere anomaly h'F, where the earthquake used as the sample of this study is an earthquake that has a magnitude ≥ 7 SR, where observations of ionospheric F layers can be done by utilizing ionosonda which has been installed in the Atmospheric and Space Observation Center (BPAA) Agam, to ensure that anomalies occur are not caused by external factors, the observations are also made through the DST Index. Based on the research that has been done, it is found that the correlation of magnitude to the anomaly h'F is positive or directly proportional. This is indicated by the emergence of a significant deviation of h'F value 7 days before the earthquake event so that observations of the h'f anomaly of the ionosphere layer are recommended as earthquake precursors. Based on the precursors that have been observed, the precursors were observed in the Aceh earthquake on 4, 6, 7 and 9 April 2012. The precursors in the Mentawai earthquake on 18 and 19 October 2012 and the Bengkulu earthquake precursors on 7 and 10 September 2007.

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

Kajian kapasitansi membran akibat variasi massa kitosan (Study of membrane capacitance due to mass variation of chitosan) Monicha Esti; - Gusnedi; - Ratnawulan
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

ABSTRACTMembrane is a layer that separates the two phases and organize mass transfer of the two phases were separated. Chitosan can be used as materials for membrane by dissolving chitosan powder in acetic acid 1 %. To obtain membranes that have good physical qualities, it is necessary to research on the physical properties of membranes. This type of research is experimental research with samples of chitosan membranes made of chitosan powder with chitosan mass variation is used as the membrane are 2 grams, 3 grams, 4 grams, 5 grams and 6 grams. Membrane capacitance values can be measured directly using the LCR meter 827. The highest value membrane capacitance is 6.10 ± 0.01 pF with a mass of chitosan used as membrane is 6 grams at frequency 1 kHz. Membrane capacitance values have a tendency decreases with higher frequency. The highest value capacitance chitosan membrane after immersion in a solution of 20 mM KCl is 7.90 ± 0.01 with a mass of chitosan used as membrane is 4 grams at frequency 1 kHz. Based on the research can be obtained an effect of mass of chitosan used as membrane due to capacitance chitosan membrane.Keywords : Membrane, Capacitance, Chitosan

Sintesis nanopartikel zirkonium dioksida (ZrO2) dengan metode sol gel menggunakan ekstrak nanas sebagai pengkelat untuk aplikasi nanofluida pendingin Dini Talenti Arya
PILLAR OF PHYSICS Vol 8 (2016)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The study of the nanoparticles is rapidly growing in the industry. The application of nanoparticles is very useful in improving the thermal conductivity of the fluid coolant such as water and oil that are still low. Efforts should be made to improve the thermal conductivity of the cooling fluid by mixing nanoparticles into the basic fluid that is called Nanofluids. This study aimed to determine the effect of pineapple’s extract on the characteristics of nanoparticles of Zirconium Dioxide (ZrO2) in terms of phase and the value of the surface area of the particles of Zirconium Dioxide (ZrO2) by one gram of it and see the effect the composition of nanoparticles suspended in a fluid on viscosity, zeta potential increase in thermal conductivity. This research is an experimental research that is conducted at the Laboratory of Science Techno Centre of Science Nuclear Applied and Technology (PSTNT) National Nuclear Energy Agency (BATAN) Bandung. The synthesis was conducted by using sol gel with calcination temperature of 700 , ZrO2 powder obtained then characterized by using XRD and Surface Area Analyzer. Furthermore, Zirconium Dioxide (ZrO2) nanoparticles mixed into 100 ml of distilled water and characterized using test equipment Viscosity, Zeta Potential meter and Critical Heat Flux (CHF). Results obtained in the study was the effect of the addition of pineapple extract as chelating against nanoparticles of zirconium dioxide (ZrO2) to prevent agglomeration/buildup on the particles of Zirconium Dioxide (ZrO2). The next result is the effect of the composition of nanoparticles of ZrO2 that were suspended in 100 ml of distilled water to the value of fluid Viscosity, Zeta Potential and rise of Critical Heat Flux. The bigger composition ZrO 2 led to a rise to the viscosity of Nano fluids water-ZrO2, the increase in the value of zeta potential and the increase of the value of Critical Heat Flux (CHF) associated with thermal conductivity values. The more viscous a fluid with the presence of nanoparticles, the conductivity value will be higher. High conductivity will improve the quality of the cooling fluid

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Contact Name Syafriani

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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

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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