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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 12 Documents

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Search results for , issue "Vol 11, No 2 (2018)" : 12 Documents clear

Sintesis dan karakterisasi sifat optik film tipis hausmannite (Mn3O4) dengan metode spin coating ( Synthesis and characterization of the optical properties of hausmannite thin film (Mn3O4) by spin coating method ) Bevi Lidia; - Ratnawulan; - Ramli
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Hausmannite is applied as a semiconductor electronics material one of them as optoelectronic material. The purpose of this research is to investigate the influence of calcination temperature on the growth of thin film by spin coanting method against the optical properties of hausmannite. Based on the results of the value of transmittance and reflectance of the thin film of hausmannite decreases at a temperature of 200 °C to 400 °C then enlarges at a temperature of 500 °C. And the absorbance value of the thin film of hausmannite enlarges at a temperature of 200 °C to 400 °C and then shrinks at a temperature of 500 °C. Using the value of transmittance obtained large energy gap at the temperature calcination 200 °C, 300 °C, 400 °C and 500 °C is 1.53 eV, 1.64 eV, 2.26 eV and 2.28 eV.

Studi awal rancang bangun colorimeter sebagai pendeteksi pada pewarna makanan menggunakan sensor photodioda (Early studies on the design of a colorimeter to detect food coloring using a photodiode sensor ) Delvi Ayu Wulandari; - Yulkifli
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Laboratory have a function important in research. Laboratory of science must be have instrumentation who sophisticated. Chemistry not separated from research, one of the research of chemistry is colorimetric. Colorimetric is a method used in chemical analysis. The method of colorimetric is used intensity of solution. The instrumentation who measuring intensity of solution is colorimeter. This research is make colorimeter used sensor photodiode. Sensor photodiode is photo detector and very sensitivity to radiance. The sample of research is food dye. The food dye in this research is green. The chosen of food dye causes the sensor just can detection color of green. The result showed the measurement of average output voltage is 1,378 V. The output sensor not stable cause the sensor have high sensitivity. Desain of instrument colorimetric is a black box. The Selection of black box cause the measurement result are not affected by external light. The research light source is monochromatic.

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,

Sintesis lapisan hydrophobic nanokomposit mangan oksida/polystyrene (MnO2/PS) untuk aplikasi self cleaning (Synthesis of manganese oxide / polystyrene nanocomposite hydrophobic coating (MnO2 / PS) for self cleaning applications ) Tia Adriany Putri; - Ratnawulan; - Ramli
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The ability of a self-cleaning surface is widely used as a surface coating such as glass, buildings, textiles, ceramics, and so on. This mechanism is called self-cleaning. The self-cleaning mechanism of the hydrophobic substrate surface is based on the effect of the lotus leaf. The surface of the substrate with a lotus leaf effect makes the impurities accumulated on the surface of the substrate fall due to water repulsion. The purpose of this research is to investigate the synthesis of hydrophobic coating of MnO2 / PS nanocomposites which is expected to be utilized as a surface self-cleaning application. The result of this research is the synthesis of hydrophobic coating of MnO2 / PS nanocomposites shows a large change of contact angle. Where the contact angle increased during the temperature of 25-300 º C, then decreased to 400 ºC.

Analisis sifat listrik nanokomposit Fe3O4/PVDF yang disintesis dengan metode sol gel untuk aplikasi elektroda baterai lithium ion (Analysis of the electrical properties of Fe3O4 / PVDF nanocomposites synthesized by sol gel method for lithium ion battery electrode applications ) - Rahmi; - Ramli; Yenni Darvina
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

As technology develops at this time, all electronic components require a voltage source. One source of voltage is the battery. West Sumatra is one area that is rich in eccentrics. Iron ore content in Tiram Beach in West Sumatra is 34.015%, followed by other elements as pollutants. However, basically there is still a lack of public knowledge about nano materials. Nano composite is a mixture of matrix and filler with a certain composition. This study aims to find out which is good for making lithium batteries. The requirement for making lithium batteries is high conductivity and high capacitance. At this time also look at the properties of fe3O4 nano compresses. Based on experiments that have been carried out will produce Fe3O4 and PVDF, the greater the value of electrical conductivity and capacitance will be. The conductivity values obtained were 437082.9 S / m, 8337755 S / m, 753969 S / m, 9300430 S / m, 1034708 S / m and the capacitance value was 35.94μF, 37.8 μF, 5.2 μF, 194 μF, 2.68 μF. Based on the results that can be used is a large amount of 10 ml: 30 ml.

Studi percepatan tanah maksimum wilayah Sumatera Barat dengan metode NGA (Next Generation Attenuation) (Study of the maximum soil acceleration of the West Sumatra region using the NGA (Next Generation Attenuation) method ) Sandra Gusdalina; - Syafriani; - Ma’muri
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

West Sumatera is an earthquake prone area because it is in the active subduction zone between the Indo-Australian plate and the Eurasian plate. In addition, West Sumatera is also traversed by the Sumatera fault system, which consists of four active fault segments, namely the Sumpur segments, the Sianok segment, the Sumani segment and the Diffi segment. From every earthquake that occurs in a place will cause a value of ground acceleration. The maximum ground acceleration value can be determined by direct measurement using Accelerograph or by attenuation formulation such as the Fukushima and Tanaka attenuation formulation (1990) and the Patwardhan attenuation formula. The data used in this study is the PGA Accelerograph value recorded in the February 2013-December 2017 period at the Padang Panjang BMKG. The magnitude used is 3.3-6.2SR and its depth is 2-218 km. the calculated PGA value using the attenuation formula will be compared with the PGA value from Accelerograph. Data processing is done by using three sensors namely Sta. sensor Geof. Padang Panjang. Sta. Met. Ketaping and Sta. Mar Teluk Bayur Padang. Based on the three sensors, the PGA value is calculated based on the formulation of Fukushima and Tanaka (1990) and Patwardhan attenuation according to the coordinates of each sensor. After obtaining the PGA value, the calculation of the attenuation formula was compared with the PGA value recorded by Accelerograph. From the three sensors, it was found that the PGA value calculated using the Fukushima and Tanaka formula (1990) approached the PGA value of Accelerograph. So the formulation of Fukushima and Tanaka (1990) is used to find the value of PGA in the West Sumatera region. Based on the formulation of the Fukushima and Tanaka (1990) attenuation, the city or district was obtained. Which has the highest PGA value in Kab. Mentawai Island. This is because the earthquake that occurs has a shallow depth and distance of earthquake sources close to kep regency Mentawai.

Studi instrumen gas analyzer inlet KILN 5W1A50A1 untuk pengukuran kadar oksigen di KILN pada PT. Semen Padang (Study of the KILN 5W1A50A1 inlet gas analyzer instrument for measuring oxygen levels at KILN at PT. Semen Padang ) Nila Yulita; - Asrizal; Zulhendri Kamus
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Oxygen has an important role in the process of burning cement and producing Carbon Monoxide. The oxygen content can be measured using a Gas Analyzer. At PT. Semen Padang has a Gas Analyzer but information about instruments, data and analysis and the use and constraints of the Gas Analyzer are still lacking. To answer this promblem researchers are interested in conducting further research. This research includes descriptive research, namely research that aims to describe or explain an object's variables. measurement results obtained from the measurement results using a Gas Analyzer. the measurement results obtained will be analyzed statistically and graphically. the measurement results are analyzed by data in one day, one week, one month and for 6 months. Based on the results of data analysis it can be seen that the oxygen gas content of the measurement results is still in the range used.

Analisis struktur batuan berdasarkan data geolistrik tahanan jenis konfigurasi schlumberger dan konfigurasi dipole-dipole di Kecamatan Malalak Kabupaten Agam (Analysis of rock structures based on geoelectric resistance of schlumberger configuration and dipole-dipole configuration in Malalak District, Agam Regency ) Winda Permatai Sari; - Akmam; - Hidayati
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The bedrock can interpreted using the Geolectrical method. The aim of this research was determine the resistivity and structure of bedrock in Malalak District Agam area. This research used Dipole-dipole configuration and Schlumbergerconfiguration. Both of that configuration have complementary advantages and disadvantages to each other. The data were processed and interpreted with using Smoothness-Constraint Least Square inversion. The result of this research showed that type structure of bdrock in malalak Disctrict Agam area with Dipole-dipole configuration and Schlumberger configuration. The type structure of bedrock on this research is Clay, Sandstone, Limestone, Andesite andGranitee.

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.

Analisis tingkat kerentanan seismik di Sumatera Barat berdasarkan nilai percepatan tanah maksimum dan intensitas maksimum (periode data gempa tahun 2007-2017) (Analysis of the level of seismic vulnerability in West Sumatra based on the value of maximum ground acceleration and maximum intensity (earthquake data period 2007-2017) ) - Mandasari; - Syafriani; Rahmat Triyono; Robby Hendra
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

A research on seismic vulnerability analysis in West Sumatera has been conducted based on maximum land acceleration and maximum intensity (Earthquake Data Period 2007-2017). This study used the empirical formulation of Mc.Guirre, Si and Midorikawa and Donovan to find the maximum ground acceleration value and the empirical formula of Murpy O’Brien was used to calculate its maximum intensity. The reference point used to calculate the maximum land acceleration value and the maximum intensity with 19 districts/cities in the region of West Sumatera. The research data used are data of earthquake recorded in BMKG Padang Panjang from February 2007 until December 2017 located in West Sumatera region with coordinated 3030’LS-0054’LU and 960BT-1020BT. Earthquake magnitude used in 5.0 SR-8.1 SR with 10-208 km depth of earthquake. Determining the seismic susceptibility level based on the calculation of maximum land acceleration and maximum intensity value using Mc.Guirre empirical formula ranges from 24.93 Gal-138.79 Gal and its maximum intensity V MMI-VI MMI. For the empirical formula of Si and Midorikawa the maximum ground acceleration value ranges from 13.50 Gal-348.31 Gal and its maximum intensity V MMI-VIII MMI. As for the empirical formula of Donovan the maximum land acceleration value is 6.04 Gal-34.47 Gal and itsmaximum intensity ranges from III MMI-V MMI. Based on the calculation of the three empirical formulation used, the level of seismic vulnerability in Sumatera region that has the highest value based on the maximum land acceleration value and maximum intensity is in the Kep. Mentawai region is at a very large risk level one.

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Syafriani

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Sumatera barat

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Home Page

OAI Link

Editorial Team

Contact

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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

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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