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JFA (Jurnal Fisika dan Aplikasinya)
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 1858036X     EISSN : 24604682     DOI : -
Core Subject : Science,
Physics
JFA (Jurnal Fisika dan Aplikasinya, Abbreviation: J.Fis. dan Apl.) hanya menerbitkan artikel penelitian asli serta mengulas artikel tentang topik seputar bidang fisika (fisika teori, material, optik, instrumentasi, geofisika) dan aplikasinya. Naskah yang dikirimkan ke JFA belum pernah diterbitkan ditempat lain serta tidak dalam proses pertimbangan untuk diterbitkan ditempat lain, dalam bahasa apapun. Studi teoritis, eksperimental, dan praktis sama-sama didorong, seperti juga artikel interdisipliner dan yang timbul dari penelitian dan kolaborasi industri.
Arjuna Subject : -
Articles 423 Documents
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RANCANGAN PERCOBAAN INFRARED THERMOMETER: KALIBRASI DAN KEUNGGULAN PEMANFAATANNYA Sutrisnawati - Mehora
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.5873

Abstract

His experiment aims to determine whether the reading of the infrared thermometer depends on the distance or angle of the incident ray, know the calibration and validation of the infrared thermometer and determine the temperature as a function of position and time for 1-D and 2-D objects and analyze the measurement results. The first experiment was carried out on objects with different areas, namely walls and small aluminum slabs with a size of 3.8cm x 3.8cm. The second experiment was also conducted on different objects, namely water with a temperature of 30oC and 60oC, which was measured at the same temperature using an infrared thermometer and an alcohol thermometer. The third experiment was carried out on 1D objects with 2 different types of materials and one type of 2D material. From the results of the experiment it can be concluded several things, for experiment one obtained differences in the reading of the thermometer at various angles and distances for object 2 (small plates), while for objects with large areas such as thermometer reading walls remain the same for different distances and angles. The thermal conductivity coefficient of aluminum is greater than iron.
Study of Earthquake Activities in the Lokop-Kutacane Fault in Aceh Province, Indonesia jihad, abdi; Banyunegoro, Vrieslend Haris
Jurnal Fisika dan Aplikasinya Vol 17, No 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i1.7830

Abstract

The tectonic setting of Aceh is very interesting to be studied. Despite many researches of Aceh’s tectonic setting, still there are many hidden faults waiting to be studied. One of them is Lokop-Kutacane fault which becomes active in 2020. There is an increase in frequency of earthquakes in Lokop-Kutacane fault. Magnitude-fault length analysis indicates that maximum magnitude of Lokop-Kutacane fault is M7,6 but historically it only had M6.8 in the past. CDF and PDF analysis show that the highest probability of earthquake magnitude is between 3 to 4 at 28.9%. Focal mechanism also gives two nodal planes with the direction of strike of 62 and 153. The distribution of earthquakes trend fits the 153 strike nodal plane with the direction of Northwest-Southeast. The calculation of b-value gives 0.78 that indicate that the fault is not able to hold a large amount of stress or the stress will be released in form of small to moderate earthquakes.
Pembuatan Paduan Tembaga Sebagai Bahan Baku Uang Logam Eddy Agus Basuki; Khaidar Said
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.5824

Abstract

Umumnya perunggu digunakan sebagai material untuk perhiasan, medali dan koin mata uang, karena paduan logam ini memberikan warna yang baik dan kekerasan yang relatif tinggi. Indonesia pernah menggunakan perunggu aluminium untuk koin mata uang. Khusus untuk koin mata uang, persoalannya adalah bahwa material dasar untuk pembuatan koin ini diimpor dari luar negeri sehingga menyebabkan tingginya biaya pembuatan koin. Dalam kenyataannya Indonesia memiliki sumber yang memedai untuk menyediakan material dasar untuk memproduksi paduan logam ini. Makalah ini membahas studi pembuatan paduan logam berbasis Cu-Al-Sn untuk kegunaan sebagai bahan koin uang logam. Logam dasar yang digunakan, yaitu tembaga, timah dan aluminium diperoleh dari PT. Smelting, PT. Inalum dan PT. Timah. Sebanyak 12 variasi paduan dibuat untuk kemudian diuji sifat fisika dan sifat mekanis serta pengamatan struktur mikro. Semua hasil paduan yang dibuat dibandingkan dengan uang logam yang pernah digunakan sebelumnya yaitu koin Rp. 500,-. Hasil studi menunjukkan bahwa penambahan Sn dan Al ke dalam paduan Cu meningkatkan kekerasan dan menurunkan berat jenis paduan logam yang dihasilkan, tetapi pengotor Fe menurunkan ukuran partikel endapan. Hasil percobaan menunjukkan bahwa dijumpai empat komposisi paduan yang memiliki sifat yang lebih baik dibandingkan dengan paduan logam yang pernah digunakan untuk koin Rp. 500,-.
Evaluation and Analysis of Uncertainty Measurement of The Sound Level Meter Calibration by Coupler Method Bondan Dwisetyo; Denny Hermawanto
Jurnal Fisika dan Aplikasinya Vol 17, No 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i1.6874

Abstract

The evaluation and analysis of uncertainty measurement of sound level meter calibration by coupler method was carried out by Research Group for Acoustics and Vibration – National Standardization Agency of Indonesia (BSN). The aims of this work is to evaluate and analyze the uncertainty measurement of sound level meter (SLM) calibration using the coupler method, where it is focused for A-frequency weighting as main parameter based on Guide to the expressions of Uncertainty in Measurement (GUM). The uncertainty budgets that obtained of this work consists of a repeated measurement of sound level meter test using the multifunction acoustic calibrator as the reference instrument, readability of SLM, sound pressure level calibration of the reference along with drift of the standard, sound pressure response, the level of accuracy, the total harmonic distortion with noise, and the capability of the used insulation box to insulate background noise from outside. From the result of case study, the standard instrument withal its sound pressure response and level of accuracy has the highest contribution to provide the significant evaluation of the expanded uncertainty at the frequency of 8000 Hz that put of the values are 0,17 dB and 0,14 dB respectively. After that, the obtained expanded uncertainty reach up to 0,48 dB of this frequency. In addition, this result also state that the proposed expanded uncertainty values are below to the maximum of acceptance values that required by IEC 61672-1:2013. Thus, it is acceptable and is considered to be applicated further for the calibration of sound level meter, and other the utilized microphone instruments.
Kajian Validasi Data Global Satellite Mapping of Precipitation (GSMaP) di Bengkulu Diana Cahaya Siregar; Nasyithah Az-Zahra Lubis; Abdi Jihad; Tuti Herawati
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.4944

Abstract

The rainfall observation data is hard then we need other option to obtain the data which is easier and more accurate. One of methods to obtain rainfall data is using remote sensing. GSMaP is one among products produces by remote sensing which is able to obtaining rainfall data using satellite. The aim of this study is to validate the rainfall data using GSMaP to the rainfall observation data in Bengkulu for 2012-2015. The method used is processing GSMaP data into monthly data then comparing it with in situ data. In addition, there's processing data with statistical test. Based on the results, the correlation between GSMaP data and observation data is in range of 0,4 to 0,89. It shows that GSMaP data is quite valid to be used to fill incomplete rainfall data in Bengkulu, but it has not been able to intrepret value close to underforecast data.
Desain Efisiensi Energi Penggunaan Lampu pada Perpustakaan Lantai 5 ITS Surabaya Suyatno, Suyatno; Maslahah, Maslahah; Indrawati, Susilo
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6223

Abstract

Pencahayaan merupakan salah satu faktor penting dalam pemanfaatan ruang perpustakaan. Nilai kuat pencahayaan minimal yang dianjurkan pada ruang perpustakaan adalah 300 lux [5]. Penelitian ini dilakukan untuk mengetahui besar dan kemerataan nilai kuat pencahayaan di ruang baca perpustakaan lantai 5 ITS Surabaya dengan melakukan pengukuran dan simulasi menggunakan software DIALux 4.13 untuk kondisi existing. Pengukuran kuat pencahayaan dilakukan pada 31 titik dengan ketinggian 1 meter di atas bidang kerja. Pada kondisi eksisting, jumlah lampu yang dipakai adalah 112 lampu Philips tipe 1xTL-D36W/54-765 dengan daya sebesar 43 Watt dan menghasilkan fluks luminus sebesar 2500 lumen, 19 lampu 2xTL-D36W/54-765 dengan flux luminus 5000 lumen berdaya 85 Watt, dan 6 buah lampu philips RS061B 1xLED tipe 5-36-/830 berdaya 6 Watt dengan fluks luminus 480 lumen. Berdasarkan hasil yang diperoleh diketahui bahwa nilai kuat pencahayaan rata-rata 90,27 lux. Nilai ini menunjukkan bahwa kuat pencayahaan di perpustakaan belum memenuhi standart untuk ruang baca. Sedangkan untuk keseragamannya sebesar 0,48 di bawah standart yang seharusnya yaitu 0,6 [4]. Sementara untuk daya total yang dibutuhkan 6467 Watt. Pada simulasi perbaikan dengan mengganti semua lampu TL di area baca dan rak buku dengan lampu philips LL 121X 1xLED45S/840 O 4200 lm sebanyak 129 lampu berdaya 32 Watt didapatkan hasil kuat pencahayaan rata-rata sebesar 344 lux dan kemerataannya 0,62. Penggunaan jenis lampu ini juga mampu menurunkan penggunaan daya sebesar 4164 watt dari kondisi awal 6467 watt, atau lebih efisien 36% dibandingkan dengan kondisi awal.
Effect of Electrolytes on the Performance of Dye-Sensitized Solar Cell (DSSC) with Mulberry (Morrus) Extract as Dye Sensitizer hikmah, irmayatul; Zahrok, ZId Latifatas; Prajitno, Gontjang
Jurnal Fisika dan Aplikasinya Vol 17, No 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i1.6988

Abstract

A prototype of Dye Sensitized Solar Cell (DSSC) based TiO2 nanoparticles and mulberry (morrus) extract as dye sensitizer on the ITO glass substrate has been produced. The study aims to determine the difference between the use of gel electrolyte and liquid electrolyte on its influence on DSSC performance. Sandwich cells were made consisting of a working electrode in the form of a conductive glass ITO deposited with TiO2 which was sensitized by a dye of mulberry extract, the opposite electrode in the form of a conductive glass ITO with carbon deposited, and the electrolyte in the middle of the two electrodes were liquid and one was gel. Irradiation was carried out on both samples by lighting halogen lamps. Tested the characteristics of voltage-time and current-time in both samples. The results obtained for higher voltage and current values in samples with liquid electrolytes, but for the period of stability the samples with gel electrolytes showed better performance.
Analisis PGA (Peak Ground Acceleration) Pulau Lombok Menggunakan Metode Pendekatan Empiris Baiq Nora Kusumawardani; Lalu A. Didik; Bahtiar Bahtiar
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6372

Abstract

Pulau Lombok berada di antara dua lempeng besar yaitu lempeng Asia dan lempeng Australia sehingga Pulau Lombok sangat rawan akan terjadi guncangan gempa bumi dan pergeseran tanah. Faktor yang mempengaruhi niai percepatan tanah maksimum yaitu kondisi geologi dan karakteristik wilayah tersebut. Penelitian ini bertujuan untuk menganalisis nilai percepatan tanah maksimum menggunakan rumus empiris Donovan, Mc. Guirre, dan M. V. Mickey di Pulau Lombok.Data yang digunakan yaitu data sekunder gempa bumi Lombok dari Juli – September 2018 dan dianalisis menggunaakan rumusan Donovan, Guirre, dan Mickey. Hasil analisis menunjukkan bahwa nilai percepatan tanah maksimum paling tinggi sebesar 0.11191 gal yang terjadi didaerah Lombok Utara, dan daerah Lombok Utara termasuk kategori mengalami kerusakan berat. Nilai percepatan tanah masimum terkecil terjadi didearah Lombok Tengah dengan besar 0.03441 gal dan termasuk kategori sangat ringan. Dari ketiga rumusan, yang mendekati nilai percepatan tanah maksimum berdasarkan peta Shakemap yaitu rumusan Guirre.
Metode Numerik FDTD dengan Non-Uniform Grid untuk Solusi Persamaan Schrӧdinger Rohma Yuliani; I Wayan Sudiarta
Jurnal Fisika dan Aplikasinya Vol 16, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6187

Abstract

Pada paper ini, spasi grid yang tidak seragam (non-uniform grid) digunakan untuk meningkatkan akurasi pada metode finite difference time domain (FDTD). Pada umumnya, metode FDTD menggunakan grid seragam (uniform) sehingga pada kasus dengan perubahan potensial yang besar membutuhkan spasi grid yang cukup kecil dan jumlah grid yang banyak untuk mendapatkan akurasi yang diinginkan. Dengan spasi grid tidak seragam, posisi titik grid disesuaikan dengan perubahan potensial sehingga akurasi tinggi dapat diperoleh tanpa menambah jumlah grid. Pada paper ini, komparasi hasil metode FDTD dengan grid seragam dan tidak seragam untuk berberapa sistem kuantum diberikan. Hasil numerik menunjukkan bahwa peningkatan akurasi diperoleh dengan menggunakan grid tidak seragam.
Modeling of Coal Deposition Using the Resistivity Method with Wenner Configuration in the Bentarsari Basin Area, District of Salem, Brebes Regency, Central Java Putri Suci Ramdani; Muhammad Sehah
Jurnal Fisika dan Aplikasinya Vol 17, No 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i1.6897

Abstract

Research to model coal deposits in the Bentarsari Basin area of Salem District in Brebes Regency has been done using the geoelectric-resistivity method with Wenner configuration. Resistivity data acquisition is carried out on five tracks, with each track has a length of 200 m. The least squares inversion method is applied to obtain a 2D-resistivity section model. Furthermore, the 2D-resistivity section model data for each line is combined into a 3D model to determine the coal deposit model in the area. The results of the interpretation indicate that the subsurface structure of the area consists of clay, sandy clay, coal, and sandstone; where the type of coal is lignite. This coal deposit has resistivity values with interval of 86.1 – 219.0 Ωm, which is distributed evenly with depth of 0.0 – 26.5 m, where the southern part of the all track has a higher potential. This research can be followed up with log drill testing to determine the actual subsurface layer, so that it can be utilized as a very economical alternative energy.

Page 34 of 43 | Total Record : 423

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