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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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Investigasi Difusi pada Sistem Urinari untuk Gangguan Fungsi Ginjal Model Empat Kompartemen menggunakan Metode Monte Carlo Jovi Yuzzer Budiman; Jodelin Muninggar; Adita Sutresno
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5063

Abstract

Kidney is a pair of organ in our urinary system that function to filter blood and urine establishment through filtration, reabsorption and secretion process.Formation of urine is done through one of processes, named tubular reabsorption. This process is a process of diffusion, passively and facilitated. The process happens in tubular reabsorption in kidney can be simulated by using Monte Carlo Cell simulation. Making model of 4 compartments consist of blood vessel, 2 kidneys with one kidney experiencing decreased function of kidney and bladder. Two kidney compartments with one of it experiencing decreased function affect the diffusion process that happens in substance reabsorption process in kidney.The purpose of this research is to study the diffusion process which happens in kidney by selecting several fixed variable and indicators which will be inspected by using Monte Carlo Cell simulation. The use of Monte Carlo Cell simulation enable to try any probabilities that occur in diffusion process of filtration, reabsorption and secretion process in kidney. The result of this research shows that the fewer number of molecules, the slower the molecular displacement and also the fewer number of surface molecules, the slower the molecular displacements.
Analisis Periodisitas Gempa Bumi Diwilayah Kabupaten Lombok Barat Dengan Menggunakan Metode Statistik Dan Transformasi Wavelet Fatimatuzzahra, Fatimatuzzahra; Didik, Lalu A.; Bahtiar, Bahtiar
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5717

Abstract

Abstrak Penelitian ini adalah penelitian eksperimen. Dimana bertujuan untuk mengetahui yang pertama variasi nilai –a (aktivitas seismik) dan nilai –b (tingkat kerapuhan batuan), kedua mengetahui peridesitas gempa bumi dengan metode statistik dan transformasi wavelet, dan yang ketiga menganalisis hasil dari metode statistik dan transformasi wavelet diwilayah kabupaten Lombok Barat. Metode yang digunakan untuk menentukan periodesitas gempa bumi dalam penelitian adalah metode statistik dan transformasi wavelet. Metode statistik dengan prangkat lunak Zmap digunakan untuk menentukan nilai –, nilai –b, dan periodesitas gempa bumi. Pada metode transformasi wavelet digunakan skewness, transformasi Box Cox,  dan transformasi wavelet continyu untuk menghitung periodesitas gempa. Penelitian ini menggunakan data dari BMKG dan National Earthquake Interntional Center (NEIC) untuk daerah antara episenter 1150.46-1160.20BT, dan 80.25 sampai dengan 80.55LS dari tanggal 22 Januari 2014 sampai 30 Oktober 2018. Analisis statistik menghasilkan parameter yang berkaitan dengan kondisi seismik (kegempaan) dan tektonik daerah penelitian. Parameter tersebut terdiri atas nilai – sekitar 5,5-2, nilai –b 0,9-1,8. Kedua parameter tersebut menunjukkan jarangnya terjadi gempa bumi dan cukup tingginya stress pada lempeng. Periodesitas berdasarkan hasil analisis statistik adalah sekitar 40-60 tahunan untuk magnitude 5,5 SR. Dengan metode transformasi wavelet diperoleh periodesitas sebesar 30 tahun dan 60 tahun untuk gempa dengan magnitudo 5,5 SR. Sehingga bisa disimpulkan bahwa hasil ini menunjukkan bahwa kedua metode tersebut menghasilkan nilai periodesitas yang hampir sama. Abstract This research is experimental research. Where the aim is to find out the first variotion of the a- vuale and the –b vuale, the second is to know the earthquake frequency whit the statistical method and wavelet transformation. And the third to analyze the results of the statistical method and wavelet transformation in the west Lombok regency. The method used to determine the earthquake periodicity in the study is the statistical method and the wavelet transformation. Statistical methods with Zmap sofwer are used to determine –a values, -b vuales, and earthquake periodicity. The wavelet transformation method uses skeweness, Box Cox transformation, and continyu wavelet transformation to calculate earthquake periodicity. This study uses data from BMKG and the National Earthquake International Center (NIEC) for the area between the epicenter of 1150.46-1160.20 BT, and 80.25 to 80.55 LS from 22 January 2014 to 30 October 2018. Statistical analysis produces parameters related to saismic conditions (seismic) and tectonic research area. The parameter consists of a vuale –a around 5,5 – 2 the –b vuale of 0,9 – 1,8. Both of these parameters shwo a rare earthquake and quite high stress on the plate. Periodicity based on the results of statistical analysis is around 40-60 years for magnitude 5,5 SR. with the wavelet transformation method, the periodecity of 30 years and 60 years is obtained for earthquakes with magnitude 5,5 SR. these results indicate that the two methods produce almost the same periodecity values. 
Studi Difusi Ca2+ Pada Sinapsis Menggunakan Metode Monte Carlo Cell Ester Ratna Sari; Giner Maslebu; Adita Sutresno
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5076

Abstract

Diffusion process became one of the important mechanisms in the human body system, such as in the nervous system which is the Ca2+diffusion in the synapses. This research aims to study the Ca2+diffusion process if Gd inhibits Ca2+channel in pre-synapses. This study did not use Gd, but it was modeled with various numbers of Ca2+ channels. The less number of Ca2+opened channels described the more Gd which inhibited Ca2+ channels. The Monte Carlo Cell Method (MCell) was used in this study. The synapses model was made using Blender 2.76b; consisted of two compartments illustrated with two circles. The molecule in the outside pre-synapses compartment interacted with the molecular surface of the pre-synapses compartment and resulted in a molecule in pre-synapses. The result of the simulation process for the molecules reached half of the variations in the number of total area channels. The time needed being 0.65s, 0.34s, 0.24s, and 0.18s, from the smallest to the biggest respectively. The times needed for density variations from big to small were 0.337s, 0.362s, and 0.364s respectively. The number of the diffused molecules in the backward rate variation within the same time was 3928, 3626, 2037, and 529 molecules respectively.
Perbandingan Citra Hasil Rekonstruksi Metode Newton-Raphson dan Landweber pada Electrical Capacitance Tomography: Analisis Resolusi dan Akurasi Rifang Pri Asmara; Agung Tjahjo Nugroho; Endhah Purwandari
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5238

Abstract

Penelitian untuk membuat desain Electrical Capacitance Tomography dilakukan menggunakan metode numerik Finite Difference Method (FDM) untuk forward problem dan ditentukan tingkat akurasinya terhadap metode analitik. Solusi berbasis FDM yang diperoleh, digunakan dalam proses rekonstruksi menggunakan metode Landweber dan Newton-Raphson. Perbandingan citra hasil rekonstruksi dari kedua metode dianalisis berdasarkan resolusi dan akurasi citra yang dihasilkan. Hasil penelitian ini menunjukkan bahwa akurasi Finite Difference Method dengan melakukan pemotongan garis pada objek domain, didapatkan 90,57% pada garis horizontal dan 87,43% pada garis vertikal. Adapun hasil untuk rekonstruksi didapatkan akurasi proses rekonstruksi 98% untuk Newton-Raphson dan 88% untuk Landweber. Resolusi citra yang direkonstruksi dengan menggunakan Newton-Raphson mampu membedakan 2 benda dengan jarak pisah minimal 3 cm, sedangkan Landweber mampu membedakan 2 benda dengan jarak pisah minimal 8 cm.
Analisis Silika (SiO2) Hasil Kopresipitasi Berbasis Bahan Alam menggunakan Uji XRF dan XRD Linda Silvia; Mochamad Zainuri
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5322

Abstract

Synthesis process of silica (SiO2) from Bancar sand has been carried out by coprecipitation method using NaOH. This study tried to obtain high purity silica from the natural resources by analyzing it using the Rietveld method. Experiments are conducted with different training. Study of X-ray Fluorescence (XRF) analysis showed that Bancar sand was used containing a silica composition weight of 81.7%. X-ray Diffraction (XRD) pattern proves that the synthesized SiO2 formed is amorphous silica, but is still a crystal structure, so that amorphous silica has not yet been formed as a whole. SiO2 content obtained showed high purity using the Rietveld method proved by GoF < 4%. By using MAUD software was obtained silica from coprecipitation methods have particle size were 98.4 ± 57.7 nm.
Interpretasi Batuan Bawah Permukaan Prospek Bijih Besi di Kawasan Desa Pagubugan dan Desa Pagubugan Kulon Kecamatan Binangun Kabupaten Cilacap Berdasarkan Survei Magnetik Muhammad Sehah
Jurnal Fisika dan Aplikasinya Vol 15, No 3 (2019)
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 109.2988° E to 109.31892° E and 7.68430° S to 7.70402° 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 109.30981° E and 7.69264° S to 109.31787 °E and 7.69575° S.
Analysis of Small Scale Topography and Local Precipitation in Bangka Belitung Island Ratih Prasetya; Rizki Adzani
Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.6301

Abstract

Weather early warning forecast has been developed using various method and data to investigate small scale weather characteristic. Each region, especially in low latitude has unique and dynamic local weather circulation. Bangka Belitung Island has a typical topography consists of hilly region and directly adjacent to the sea. Thus, this expected to have a high impact in local weather circulation. The used of in-situ data (air temperature, rainfall amount also wind surface speed and direction), weather satellite observation and meteorological model is chosen to investigates the local weather circulation characteristic. Findings in this study is that topography, has influencing and controlling local circulation such as the presence of land breeze and sea breeze supporting the formation of convective clouds around the hills in Bangka Belitung Island. Wind surface analysis shows that strong sea breeze activity occurred during the MAM period. Himawari satellite imagery analysis showed that rain occurred in the afternoon and only occurred in the mainland region of Bangka Belitung.
Analisis Resolusi Spasial Citra Ultrasonografi (USG) pada Arah Tangensial Radias Citra menggunakan Phantom Berbasis Silicon Rubber Victory Immanuel Ratar; Surya Suryasatriya Trihandaru; Giner Maslebu
Jurnal Fisika dan Aplikasinya Vol 16, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.4287

Abstract

Ultrasound is widely used in diagnostic imaging, therefore quality control(QC) of ultrasound images is important. One of the QC parameter is spatial resolution that can be analyzed by calculating the distance between two nearby object in the tangential direction of radiation. The image that is produced by the Curved Array transducer will produce a circular shaped image and the coordinates of the object isn’t in the cartesian coordinate system because it adapts to the surface of the transducer. The image must be transformed with a circle equation approach to calculate the distance between two nearby object. This study was using a Mindray 3D ultrasound model: DP-10 with Transducer model: 35C50EB, and phantom instruments made from a mixture of 99 ml silicon rubber and 1 ml catalyst. The acquisition data used a fixed frequency of 4.5 MHz with a gain variation of 168 dB, 182 dB, 202 dB and a depth variation of 3.3 cm, 4.9 cm, 5.7 cm. The result found that the measurement of objects in A area had an error of 0.8963%(0.087 mm),B area was 1.2979%(0.0779 mm), and C area was 2.6296%( 0.1183 mm). The values obtained still meet the standards set by American  Association  of  Physicist  in  Medicine(AAPM).
Preliminary Study of Using KY-038 Sensor Based on Arduino UNO and LabView to Determine the Pulse Rate Nur Afifah Zen; Slamet Indriyanto; Indah Permatasari; Juwansyah Sasmita; Lia Yuliantini
Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.6092

Abstract

The KY-038 sensor module is designed using Arduino UNO and LabView to allow human pulses. The experiment was carried out by making a design consisting of the KY-038 sensor module, Arduino UNO and LabView on a computer. LabView software is used to display pulse wave patterns. Measurement of the pulse will involve human objects with variations 3 namely relax (sit), sit and after running in place. The experimental results show that the different activities affect the voltage released on a chart that has a rating of 3 - 3.5 V. The more activities that are carried out before retrieving the pulse data, the greater the voltage that is read on the LabView results graph. After running in place, the value of the voltage and pulse are 3.5 V and 97 beats per minute, respectively
AUDIO BIO HARMONIC WITH WT5001 SMARTCHIPUSING SOLAR CELL Nur Kadarisman; Fitria Ayu Sulistiani; Wipsar Sunu Brams Dwandaru; Rhyko Irawan Wisnuwijaya; Agus Sugiarto
Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.3750

Abstract

The design of audio bio harmonic (ABH) with smartchip WT5001 using solar cell technology in the form of ABH instrumentation with an electricity resource derived from solar energy has been successfully created and tested, which includes (i) testing the peak frequency of sound and sound output, and (ii) emptying and charging tests to determine the effectiveness of the use of the solar cell as the power provider. The ABH system consists of (i) a sound generator device composed of WT5001 sound modules, amplifiers, and horn speakers, and (ii) structured power supply devices for solar cell modules, charger controllers, and batteries for storing power. The test results of the peak frequency for the insect (garengpung) sound files and the output sound of the ABH device indicate a deviation of peak frequency of 13.46 Hz to140.81 Hz. The 15 hours emptying test results in on mode with battery charging for 7 hours shows that the use of 10Wp solar cell is effective to provide electrical power in ABH tool operation.

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