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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 10 Documents

Search results for , issue "Vol 13, No 1 (2020)" : 10 Documents clear

Pengaruh komposisi CoFe2O4 terhadap sifat magnetik nanokomposit CoFe2O4/PVDF yang disintesis dengan metode sol gel (The effect of CoFe2O4 composition on the magnetic properties of the CoFe2O4 / PVDF nanocomposites synthesized by the sol gel method) Sovia Yulianti; - Ramli; - Yulkifli; Yenni Darvina
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Cobalt Ferrite (CoFe2O4) is a magnetic material that has high coercivity, magnetic properties, and has electrical resistivity and high saturation magnetization, very suitable for applications in the field of magnetic, magnetic sensors, magnetic sensor constituents, biomedical materials, Magnetic Resonance Imaging (MRI) and hypertamia. The purpose of the survey is to explain the composition of the CoFe2O4 composition on the magnetic properties of the CoFe2O4 / PVDF nanocomposites synthesized by the Sol-Gel Method. There are three research results from vsm test data on hysteresis curves. First, the magnetization saturation data of each variation obtained results of 2.07 memu, 0.97 memu, 2.18 memu, 1.07 memu, and 0.91 memu. Second, the Remanent Magnetization data obtained results are 0.41 memu, 0.28 memu, 0.35 memu, 0.27 memu, and 0.16 memu. Third, the Medan Coercivity data is 208.31 Oe, 293.42 Oe, 163.20 Oe, 335.88 Oe, and 93.86 Oe.

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 alat ukur kadar gula darah berdasarkan tingkat kekeruhan spesimen urin menggunakan sensor warna TCS230 dan photodioda dengan tampilan LCD (An instrument for blood sugar level based on the turbidity level of the urine specimen using a TCS230 color sensor and a photodiode with an LCD display) Zalmirda Pratiwi; - Hufri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Blood sugar levels are a major factor of diabetes. Diabetes is a one of a dangerous diseases caused by damage to the working system of the hormone insulin in the body’s metabolism. The diagnosis of blood sugar levels is generally by pricking a finger or arm to take a sample of the patient’s blood. Another method can be used without hurting the patient’s body, which is using a urine sample. Discoloration of the patient’s urine can be detected using the TCS230 color sensor and photodiode. The design of the tool system in this research uses the changes in the color of the urine specimen as a measurement parameter. This research aims to determine the performance and design specifications of the manufacture of blood sugar levels based on the level of urin turbidity using the TCS230 color sensor and photodiode. There are two research results. First, the result of performance specifications is a beam-shaped measuring device consisting of an object box measuring 8,5x6x8 cm3 and an electronic component box measuring 20x10x10 cm3. Second, the result of design specifications are the precision of the tool at 95,95% with a percentage of errors of 4,44% and accuracy of 99,25%.

Pengaruh komposisi MnFe2O4 terhadap sifat listrik nanokomposit MnFe2O4/ PVDF yang disintesis dengan metode spin coating (The effect of MnFe2O4 composition on the electrical properties of MnFe2O4 / PVDF nanocomposites synthesized by the spin coating method) Onny Gustira; Yenni Darvina; - Ramli
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Manganese ferrite (MnFe2O4) has an MnFe2O4 structure in which its manufacture uses manganese mineral powder. MnFe2O4/ PVDF nanocomposites are made in the form of thin films to see the electrical properties that are affected by variations in composition. MnFe2O4/ PVDF nanocomposites were characterized using XRD, FTIR and FPP. The XRD characterization results show that the Monoclinic Crystalline form for PVDF and Cubic for MnFe2O4, the angular value of 2θ formed is the greater the composition of MnFe2O4 from small to large used, then MnFe2O4 and PVDF are already present in the MnFe2O4/ PVDF angles which are seen in the composition of MnFe2O4 from small to large used, then MnFe2O4 and PVDF are already present in MnFe2O4 / PVDF diffraction peak. FTIR characterization results can be seen that MnFe2O4 successfully binds to PVDF, where Fe-O is a functional group MnFe2O4 and CH2 is a PVDF functional group. The results of the FPP characterization show that if the MnFe2O4 composition is getting bigger and the PVDF composition is getting smaller, the resistivity value is small and the conductivity value is greater.

Analisis kondisi pasang surut dengan waktu kejadian gempabumi Sumatera Barat (Analysis of tidal conditions with the time of the earthquake in West Sumatera) Elka Fitri Enora; Letmi Dwiridal
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Tides are a phenomenon of movement of the ups and downs of the surface of the sea water at intervals caused by a combination of the gravitational force and the attractive force of celestial bodies, especially by the sun, earth and moon. Earthquake events can occur from earth rock rock fractures by forces (including gravitational forces) that are collected slowly, and earthquakes can also occur if the stress shear causes the force to exceed the strength of the rock, causing deformation. Analysis of tidal conditions with the time of the West Sumatran earthquake in the period 2009-2019. The increase of tides in the period 2009 is on the 2009-09-30 has a depth of 79 km above sea level which is in the Mentawai Islands. Meanwhile, in the year 2010 there are 2010-10-25 has a depth of 10 km above sea level in the Mentawai Islands. In 2011 it was in the year 2011-08-04 had a depth of 41 km on sea level in the Mentawai Islands. While in the period 2016 there are 2016-06-01 has a depth of 69 km above the surface of the sea water in the Siberut estuary. In the period 2018 there are 21/04/2018 has a depth of 35 km are in the Siberut estuary.

Rancang bangun tirai otomatis menggunakan sensor cahaya dan remote control (A design of automatic blinds using a light sensor and remote control) Desvita Roza; - Hufri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The development of science and technology that is increasingly advanced is widely used by humans to meet human needs. This rapid technological development is marked by the number of equipment that has been created and operated both manually and automatically. Utilization of an automatic control system in the context of smarh home can be applied to the curtain and light media that exist in every home. The purpose of this study is to determine the performance specifications and design specifications of an automatic curtain using a light sensor and remote control.This research is included in engineering research. This study explains the specifications of performance and specifications for automatic curtain design. Performance specifications describe the functions of automatic curtain tool builders, while design specifications explain the accuracy and accuracy of the tools. The measurement technique is done directly and indirectly. Direct measurements are carried out on the voltage value, while indirect measurements are carried out by analyzing the accuracy and accuracy of the automatic curtain tool. The sensor used is the LDR sensor. The results of the study of performance specifications and design specifications. First, the performance specifications of the automatic curtain consist of the LDR sensor, remote control, curtain drive, and electronic circuit builder of the automatic curtain system. The LDR sensor used is the LDR sensor with a maximum resistance of 50kΩ. The second result, the results of the design specifications of this study consisted of accuracy and accuracy. The accuracy value of the automatic curtain tool is 99.16% and the accuracy value is 98.98%

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%.

Pengembangan digital resistivity meter multielektroda otomatis untuk konfigurasi Schlumberger (Development of an automatic multi-electrode digital resistivity meter for the Schlumberger configuration) Erin Ficrah Huda; - Yohandri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Prototype digital multi-electrode automatic resistivity meter is a prototype that is used to measure ground resistivity with 16 electrodes based on the ohm law principle. By selecting four electrodes as a measuring point, then injecting voltage through the two current electrodes, the potential difference between the two electrodes can be detected. Current and voltage data obtained can determine the value of resistivity or soil resistivity. This research is a type of research and development that functions to develop existing products. From the results of the study, it can be stated four results consisting of internal testing results, product manufacturing results and initial field testing results or limited trials. The results of internal testing are looking at the characteristics of the current detection circuit, then testing the relay module and multiplexer module. The products are made up of prototype boxes, cable electrodes, 16 nail electrodes and, 12-volt batteries. Preliminary field test results on a laboratory scale for current and voltage measurements with error percentages from 0,8% to 31,8% and 0,098% to 11,76%, respectively. Limited field test results for resistivity measurements at three different locations obtained an average accuracy of 78,05%; 78,89% and 84,05%, respectively. While the average accuracy was 77,50%, 99,74% and 99,41%, respectively.

Pengembangan sistem pengontrolan konduktivitas listrik larutan berbasis internet of things untuk tanaman hidroponik (Development of the electrical conductivity control system in the solution based on the internet of things for hydroponic plants) Weli Erlina; - Asrizal
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Hydroponics has become an alternative for people who want to garden, but they didn’t have enough space to grow crops. The most important problem that must be considered in hydroponic cultivation is the provision of adequate nutrition for plants. Inappropriate electrical conductivity values will result in undesirable things. Controlling conductivity in plants hydroponically is required so that the plants get the value of conductivity that accordingly. The purpose of the research is to determine the performance spesifications of the electrical conductivity control system, determine the effect of adding AB Mix solution to the conductivity and output voltage values, determine the accuracy and precision of the electrical conductivity control system on laboratory scale tests, and determine the results field scale test on the conductivity control system. This research is classified as research and development which is a research method used to develop products. Based on the results of data analysis, it can be concluded that there are four research data results. First, performance specifications which consist of sensors to measure electrical conductivity values, a circuit box containing a Node Mcu and a relay to drive the solenoid valve in the event of control. Second, the effect of adding AB Mix is directly proportional to the value of the conductivity. This means that the more the addition of solution AB Mix then the greater value output voltage. Meanwhile, the determine of the output voltage value the greater with the addition of solution AB Mix. Third, the results of the accuracy and presicion of the electrical conductivity control system of 98.98% and 97.40%. That is, the measurement and control data can be used because it is close to 100%. Third, the results of field scale tests that have been carried out for 3 days get varied data. Electrical conductivity values obtained during the field scale tests from 690 ppm up to 945 ppm.

Pengaruh komposisi MnFe2O4 terhadap sifat magnetik nanokomposit MnFe2O4 / PVDF yang di preparasi dengan metode spin coating (The effect of the MnFe2O4 composition on the magnetic properties of the MnFe2O4 / PVDF nanocomposites prepared by the spin coating method) Romizah Marta; Yenni Darvina; - Ramli; - Desnita
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Now is the age of the "Internet of things", where physical devices are able to exchange information between information sources connected to the system. To build a system, it takes a components device which in the manufacturing process is made into Nanocomposites. In this research, the materials used as Nanocomposites are Manganese ferrite (MnFe2O4) and Polyvinilidene Flouride (PVDF). Then the method used is the Spin Coating. The Spin Coating Method is used to grow a thin layer of MnFe2O4 / PVDF Nanocomposites. In the process of making Nanocomposites, Manganese and Iron are used as precursors. In this research, researcher used five variations of the composition of MnFe2O4 / PVDF Nanocomposites, namely 25% : 75%, 33.33%: 66.67%, 50% : 50%, 66.67%: 33.33% and 75%: 25%. There are three characterization tools used in this research namely XRD, FTIR and VSM. The results of XRD characterization as supporting data in this research show each peak has a different angle of 2Ө, intensity, FWHM value and Miller Index. Crystal form of PVDF is Monoclinic and Crystal form of MnFe2O4 is Cubic. The results of FTIR characterization as supporting data found two functional groups, namely Fe-O and CH2. For Fe-O is the MnFe2O4 Function Group, and CH2 is the PVDF Function Group or (C2H2F2)n. The results of the characterization of VSM as the results of the study show the relationship between the variation of the composition of the MnFe2O4 / PVDF Nanocomposites with Saturation Magnetization which tends to decrease which is worth 2.07 at 25% : 75% composition, 1.11 at 33.33% : 66.67% composition, 1 at 50% : 50% composition, 1.54 at 66.67% : 33.33% composition and 1.09 at 75%: 25% composition. The same result also occurs in the relationship of composition variation with Remanent Magnetization, which is worth 0.37 at 25% : 75% composition, 0.35 at 33.33% : 66.67%, 0.47 at 50% : 50% composition, 0.31 at 66.67% : 33.33% composition, 0.25 at 75% : 25% composition. Furthermore, the results of the relationship of variations in the composition of MnFe2O4 / PVDF nanocomposite with Coercivity is high low Coercivity values. This shows the change in nature from Hard Magnetic to Soft Magnetic. The value of Coercivity is 297.08 at 25% : 75% composition, 144.96 at 33.33%: 66.67% composition, 274.05 at 50% : 50% composition, 300.53 at 66.67% : 33.33% composition and 196.57 at 75% : 25% composition.

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Home Page

OAI Link

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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