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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 604 Documents
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Pencitraan Inframerah Dekat dari Lemak Sapi pada Model Lemak Tissue: Chrisli Elfri Sahuleka, Jodelin Muninggar, dan Ferdy S. Rondonuwu Chrisli Elfri Sahuleka Chrisli Elfri Sahuleka; Jodelin Muninggar Jodelin Muninggar; Ferdy S. Rondonuwu Ferdy S. Rondonuwu
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4584

Abstract

All women concern for their beauty. Some ways are done to obtain beauty with the use of creams, routine care in beauty clinics, up to plastic surgery by having liposuction on the desired part of the face. In the early procedures of plastic surgery, a 2-4cm incision is made on the skin before sucking the fat out. This cutting can cause various risks. Therefore, a non-destructive method is needed to identify the position of fat as a pre-plastic surgery procedure. Near Infrared Spectroscopy is a method for quickly and precisely identifying and measuring a sample without damaging it. This study aims to determine the area spectral and or wavelength sensitivity for fat and several other important components and to determine the position of fat from a one-dimensional image. The results show that the location of fat is in position 11-28. From this, it can be concluded that NIRS can inform the position of fat from a one-dimensional image.
Interpretasi Batuan Bawah Permukaan Prospek Bijih Besi di Kawasan Desa Pagubugan dan Desa Pagubugan Kulon Kecamatan Binangun Kabupaten Cilacap Berdasarkan Survei Magnetik: Adib Meiditha Wibowo, Sehah, dan Sugito Adib Meiditha Wibowo Adib Meiditha Wibowo; Sehah Sehah; Sugito Sugito
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4611

Abstract

Geophysical exploration to determine the potential of iron sand in the Pagubugan Village and Pagubugan Kulon Village areas, District of Binangun, Regency of Cilacap has been carried out from May to August 2018 using the magnetic method. The acquisition of magnetic data has been done in the research area at the geographical position stretching from 109.29880 E to 109.318920 E and 7.684300 S to 7.704020 S. Morphologically, the research location is the part of the eastern coastal in the district of Binangun. The results of the modeling and interpretation of magnetic anomaly data that obtained indicate the presence of rock deposite which thought to contain iron ore which intersects with clay, silt, sand, gravel, and crust from the Alluvium formation with a magnetic susceptibility value of 0.0094 cgs units. This rock deposite is estimated to lie at a depth of 0 to 53 meters and stretches at the geographical position from 109.309810 E and 7.69264 S to 109.31787 E and 7.695750 S.
Blood Pressure Monitor Design Using MPX5050GP Pressure Sensor and Visual C# 2010 Express: Ayu Jati Puspitasari, Endarko Endarko, Iim Fatimah Ayu Jati Puspitasari Ayu Jati Puspitasari; Endarko Endarko; Iim Fatimah Iim Fatimah
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4929

Abstract

Blood pressure monitor (BPM) using oscillometric method with MPX5050GP pressure sensor has been successfully fabricated and calibrated. Oscillometric method is measurement method to observe cuff pressure oscillations. In this study, the oscillometric waveform measured by fabricated BPM used Arduino Uno which processes pulse rate, systolic and diastolic pressures. Measurement results of pulse rate, systolic and diastolic pressures will be displayed and recorded in application designed using Visual C# 2010 Express. Fabricated BPM capable of measuring pulse rate and blood pressure in the range of 40-260 mmHg with ratio of systolic and diastolic pressures were achieved 0.48 and 0.78, respectively. The system has an average error of systolic pressure, diastolic pressure, and pulse rate were -4.38 mmHg (2.72%), 0.10 mmHg (5,55%), and 4.48 bpm (6.07%).
Kinetika Reaksi Proses Pirolisis Pada Sekam Padi: Casnan, Erliza Noor, Hartrisari Hardjomidjojo, Irzaman, dan Eti Rohaeti Casnan Casnan; Erliza Noor Erliza Noor; Hartrisari Hardjomidjojo Hartrisari Hardjomidjojo; Irzaman Irzaman; Eti Rohaeti Eti Rohaeti
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4602

Abstract

This study aims to determine the reaction kinetics of the rice husk pyrolysis process by analyzing the characteristics of the Thermogravimetry Analysis (TGA) curve. Characteristics of the TGA Curve describes the process of losing mass to the temperature in the pyrolysis process with various stages of material phase changes due to the heating process. The pyrolysis process is influenced by temperature, time, and heating rate, so by analyzing the temperature, time and heating rates, the reaction kinetics will be obtained. The kinetic reaction of the pyrolysis process based on the Arrhenius equation, the speed of the decomposition reaction is influenced by changes in mass or mass fraction per unit time. Exponential factor value (A) will affect the speed of reaction of the pyrolysis process, the greater the value of A, the greater the reaction speed and vice versa. Value (A) in the pyrolysis process of HCl washed and heated rice husk, the value is smaller when compared with the value of A process of rice husk pyrolysis without washing and heating.
Sintesis Ca2P2O7 dari Limbah Kerang dengan Metode Solvotherma: Faisal Akbar, Retno Kusumaningrum, Miraj S. Jamil, Alfian Noviyanto, Wahyu B. Widayatno, Agus S. Wismogroho, dan Nurul T. Rochman Faisal Akbar Faisal Akbar; Retno Kusumaningrum Retno Kusumaningrum; Miraj S. Jamil Miraj S. Jamil; Alfian Noviyanto Alfian Noviyanto; Wahyu B. Widayatno Wahyu B. Widayatno; Agus S. Wismogroho Agus S. Wismogroho; Nurul T. Rochman Nurul T. Rochman
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.4707

Abstract

Synthesize of calcium pyrophosphate (CPP) was made using solvothermal method followed by heat treatment. The source of calcium carbonate was green shells waste and blood clams waste. CaO was obtained by decompose calcium carbonate, which is from the green shells and blood clams, at 10000 C for 2 hours in air atmosphere. CaO powder was mixed with H3PO4 to synthesize CaHPO4 using solvothermal method. Single phase of calcium pyrophosphate was obtained from blood clams waste after heat treatment of CaHPO4 at 8000 C for 2 hours. However, impurity phases were observed for calcium pyrophosphate from green shells waste. Moreover, the average particle size of calcium pyrophosphate from green shells waste was 1.5 ± 0.8 µm, which is bigger compared to 258 ± 151 nm of blood clams waste.
Efek Pemanasan Pra-Kompaksi dan Sinter Terhadap Sifat Kuat Tekan Komposit Al/SiC: Mashuri dan I. Mufidah Mashuri Mashuri; I. Mufidah I. Mufidah
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.5281

Abstract

Research on the effects of pre-compacting heating on Aluminum (Al) matrix and sintering on the density and compressive strength of Al/SiC composites made using powder metallurgy method. The synthesized of Al/SiC composites was began by heating pre-compacting of Al matrix at temperatures of 40, 60, and 800 C within 1 hour, mechanically compacting and sintering at temperatures of 400, 500, and 6000 C. In order to increase the homogeneity of pressure during compacting throughout in the composites, non-reactive and volatile zinc stearate was used. Phase and morphological identification were carried out using X-rays Diffractometry (XRD) and Scanning Electron Microscope (SEM) devices. The density and porosity were measured by the Archimedes method and the compressive strength was tested by the Torsee Universal Testing Machine. The results showed that pre-compacting in the Al matrix with the temperature of 600 C and sintered temperatures up to 5000 C can increase the density and the compressive strength of Al/SiC composites prepared by powder metallurgy method. Sintering process can give a new phase -Al2O3 in the surface area contact of Al-SiC which can strengthen interfacial bonds and reduce porosity so that the density and the compressive strength increase.
Keunggulan Ekstraksi Fitur Ordo Kedua terhadap Ordo Pertama untuk Identifikasi Ciri Berbasis Tekstur Warna: Arief Bustomi Muhammad Arief Bustomi Muhammad Arief Bustomi
Jurnal Fisika dan Aplikasinya Vol 15 No 3 (2019): October 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i3.5311

Abstract

The feature extraction method is done by first converting RGB images into grayscale images. Based on the grayscale image, two different processing methods are carried out, namely first order feature extraction and second order feature extraction. The extraction features of the first order used 5 characteristic parameters, namely Mean, Variance, Skewness, Kurtosis, and Entropy, while the extraction features of the second order used 6 characteristic parameters, namely Angular Second Moment, Contrast, Correlation, Standard Deviation, Inverse Difference Moment and Homogenity. The 11 characteristic parameters will then be classified using the LVQ artificial neural network method to find the final weight used as the reference weight for characteristics identification based on color texture. In this research, 30 image samples were used (15 image samples in category A and 15 image samples in category B) which were divided into 16 image samples for training and 14 image samples for testing. The results of the research analysis show that the second order feature extraction method is more reliable than the first order feature extraction method.
Efektivitas Paparan Medan Magnet Lemah Terhadap Tingkat Kesempurnaan Pembakaran Bahan Bakar Minyak Beroktan Rendah: Shinta Monika Utami, Giner Maslebu, dan Nur Aji Wibowo Shinta Monika Utami Shinta Monika Utami; Giner Maslebu Giner Maslebu; Nur Aji Wibowo Nur Aji Wibowo
Jurnal Fisika dan Aplikasinya Vol 15 No 2 (2019): June 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i2.3578

Abstract

Increasing levels of octane fuel in order to efficient its increasingly scarce use has been done. However, consumers still maintain the use of low-octane fuel because of its affordable price. The treatment in the form of magnetic field exposure on fuel is a means that is believed able to improve the completeness of combustion. In this study, tests were conducted on low-octane fuel with exposure to weak magnetic fields aimed at streamlining the scarcity of low-octane fuel usage. Exposure to weak magnetic fields in the storage tank before going into the combustion process will stretch the hydrocarbon bonds so that the hydrocarbon molecules are easier to oxidise. Fuel exposed to a weak magnetic field is applied to a two-stroke engine with varying engine workloads. The level of combustion completeness is measured from reduction of fuel consumption and the percentage of O2 emissions. The results of this study indicate that exposure to weak magnetic fields on low-octane fuel significantly improves the completeness of combustion processes.
Sensor Ultrasonik HCSR04 Berbasis Arduino Due untuk Sistem Monitoring Ketinggian: Fitri Puspasari, Imam Fahrurrozi, Trias Prima Satya, Galih Setyawan, Muhammad Rifqi Al Fauzan, Estu Muhammad Dwi Admoko Fitri Puspasari Fitri Puspasari; Imam Fahrurrozi Imam Fahrurrozi; Trias Prima Satya Trias Prima Satya; Galih Setyawan Galih Setyawan; Muhammad Rifqi Al Fauzan Muhammad Rifqi Al Fauzan; Estu Muhammad Dwi Admoko Estu Muhammad Dwi Admoko
Jurnal Fisika dan Aplikasinya Vol 15 No 2 (2019): June 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i2.4393

Abstract

At present the development of the digitalization world is growing. In length measurements generally can only be measured through manual measurement that measures the device that wants to know its length. However, now the world of digitalization is able to make measurements without touching the device to be measured. One of them is by utilizing sound wave sources or commonly referred to as ultrasonic waves. The purpose of this study was to prototype Arduino Due microcontroller digital distance measuring devices using HC-SR04 sensor. The research method used is literature study and direct observation. Measurement results are displayed in a computer device to facilitate reading. This design is controlled through Arduino Due. The prototype testing results of the tool can run well and can be accessed in real time.
Penentuan Pengaruh Jenis Insektisida pada Porositas Kertas Saring Menggunakan Analisa Image: Sepdian Joyta Shadday, Made Rai Suci Shanti Nurani Ayub, Riyani Setiyaningsih, Adita Sutresno Sepdian Joyta Shadday Sepdian Joyta Shadday; Made Rai Suci Shanti Nurani Ayub Made Rai Suci Shanti Nurani Ayub; Riyani Setiyaningsih Riyani Setiyaningsih; Adita Sutresno Adita Sutresno
Jurnal Fisika dan Aplikasinya Vol 15 No 2 (2019): June 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i2.4270

Abstract

Database of filter paper porosity in mosquito resistance test becomes significant in the quality parameter of mosquito resistance paper test. Insecticide has an important role in such paper. Some insecticide used in the resistance test was included in the porosity test. In order to find the porosity of WM filter paper with WHO standard, an imageJ application is needed to look for the volume of air-cavity. The paper used in this measurement was WM filter paper without insecticide as the control paper and WM filter paper with insecticide, namely cypermetrin, lamdacy halotrin, and permetrin with the concentrate that has been decided in the resistance test. The results of this study showed that the porosity of filter paper with 0,05% cypermetrin as the active insecticide was 41,53%, the porosity of filter paper with 0,03% lamdacy halotrin as the active insecticide was 49,37% and the porosity of filter paper with 0,25% permetrin as the active insecticide was 49,60%. Therefore, it was found out that based on its porosity, the filter paper with permetrin as the active insecticide was better.

Page 55 of 61 | Total Record : 604

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