cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota surabaya,
Jawa timur
INDONESIA
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
 46   47   48   49   50 
Effects of The Addition of Carbon on Abaca Fiber and PVA Composite Materials Based on Mechanical and Acoustic Properties: Susilo Indrawati, Syabania R A, Linda Silvia, Lila Yuwana, Mochamad Zainuri Susilo Indrawati Susilo Indrawati; Syabania R. A. Syabania R. A.; Linda Silvia Linda Silvia; Lila Yuwana Lila Yuwana; Mochamad Zainuri Mochamad Zainuri
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14534

Abstract

Abaca is a kind of banana that grows in Indonesia. Abaca banana product utilized in this research is a fiber that obtained from the midrib of the stem. Henceforth, abaca fiber is processed to be the form of membranes. The purpose of the study are to determine the physical, mechanical and acoustic properties of abaca fiber composite materials as fillers and polyvinyl acetate (PVA) as a matrix. The ratio of composite materials of abaca fibers and PVA is 1:10. The variations used in producing membranes are the addition of carbon powders by 0%, 2%, 4%, 6% and 8%. The characteristics carried out include testing of density, morphology, tensile strength and sound absorption coefficient. The results reveal that the highest density is obtained from the sample of 0% carbon, i.e., 1.026 gr/cm3. Furthermore, the mechanical properties testing shows the highest yield stress value in samples with 4% carbon of 476.8 MPa and the highest Young modulus in samples with 8% carbon is 7905.1 MPa. Therefore, the addition of carbon could improve the mechanical properties of composites materials. Based on the measurement of sound absorption coefficient using an impedance tube with 1 microphone, the highest value can be attained from the sample of 4% carbon, namely 0.211 which shows the sample is more reflective. The material is reflective because the amount of abaca fiber used is less than PVA. The diameter of pores formed between the fiber and PVA are very small which could cause the absorption coefficient value to be lower. Therefore, further research will focus on the addition of abaca fiber content in composite materials. The positive point in this study is that the addition of carbon with 4% and 8% provides optimal mechanical ability.
Natural Dyes Extraction of Curcuma Longa, Tradescantia Spatacea, and Bryophyta Absorption Capability on TiO2 Nanofiber Thin Layer: Novita Asma Ilahi, Fadillah Hazrina, Afrizal Abdi Musyafiq, Ahmad Aftah Syukro, Erliza Septia Nagara Novita Asma Ilahi Novita Asma Ilahi; Fadillah Hazrina Fadillah Hazrina; Afrizal Abdi Musyafiq Afrizal Abdi Musyafiq; Ahmad Aftah Syukron Ahmad Aftah Syukron; Erliza Septia Nagara Erliza Septia Nagara
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14068

Abstract

Exploration of plant variations is required to determine the absorbance ability and potential utilization of dye in the development of Dye-Sensitized Solar Cells (DSSC). Extraction of four different plants was carried out to obtain three different types of natural dyes. The curcumin dye was obtained from the extraction of Curcuma longa, the chlorophyl dye was obtained from the extraction of Bryophytes, the anthocyanin dye was obtained from the extraction of Brassica oleracea var capitata f. rubra, and Tradescantia spathacea. The research was conducted to determine the absorbance capability of each different type of dye and the image of the thin layer of TiO2 nanofiber used by DSSC. Extraction is carried out through a drying and pounding process. The powder of each plant was then synthesized using ethanol through a homogenization process for 12 hours. The research utilizes a spectrophotometer UV-Visible to determine the wavelength of the natural dye, as well as a scanning electron microscope (SEM) to determine the size of the titanium dioxide (TiO2) thin film nanofiber based on the displayed image. DSSC utilizes TiO2 nanofiber as a thin layer of semiconductor. The dye absorption peak is in the wavelength range of 350-500 nm and 650-700 nm. Based on the analysis of absorbance results, curcumin dye has the greatest potential to be used in DSSC with the highest absorption ability in all its occurrences at visible light wavelengths.
The Use of Zinc Oxide (ZnO) Photocatalyst for Photodegradation of Car Wash Wastewater: Abd Mujahid Hamdan, Rauza Azkiya, Arief Rahman, Mailiza Efriana, Rahmad Maulana, Hanif Hanif Abd Mujahid Hamdan Abd Mujahid Hamdan; Rauza Azkiya Rauza Azkiya; Arief Rahman Arief Rahman; Mailiza Efriana Mailiza Efriana; Rahmad Maulana Rahmad Maulana; Hanif Hanif Hanif Hanif
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14019

Abstract

Untreated motor vehicle waste has the potential to damage the environment. The photodegradation method can decompose pollutants with the help of UV-A light and photocatalysts. Zinc Oxide (ZnO) is a photocatalyst capable of degrading motor vehicle washing waste. This study aims to investigate the ability of ZnO as a photocatalyst in degrading pollutants in motor vehicle waste. The independent variables in the experiment were the mass of ZnO and the contact time. The variables used were mass 0.5, 0.75, and 1 gram with a contact time of 2, 3, and 4 hours. The experimental results showed that ZnO irradiated with UV-A lamp was able to degrade organic substances. The mass and contact time of ZnO affect the effectiveness of photodegradation. These results show that the use of ZnO photocatalyst for photodegradation of Carwash Wastewater may be future technology to treat car wash wastewater.
A Review - Does Low Magnitude High-Frequency Vibration (LMHFV)Worth for Fracture Recovery Compared with Pulsed Electromagnetic Field (PEMF) Based Magnetotherapy Method? Evi Suaebah, Rohim Aminullah Firdaus, Muhimmatul Khoiro Evi Suaebah Evi Suaebah; Rohim Aminullah Firdaus Rohim Aminullah Firdaus; Muhimmatul Khoiro Muhimmatul Khoiro
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14213

Abstract

The subject of electromagnetic fields is widespread today, including in the medical world. One of them is therapy in fracture healing using the Pulsed Electromagnetic Field (PEMF) method by utilizing a magnetic field. Fracture healing using the magnetic field method utilizes the Helmholtz coil, which is influenced by the current and the amount of turns flowing in the magnetic field. This study conducted a literature study on fracture healing using the PEMF and the LMHFV methods. A comparison of these two methods will show different healing effects. From the studies, we can conclude which way has the most advantage in healing. A faster rehabilitation process will have an impact on reducing implant failure. In contrast, Applying the LMHFV method to bone fractures gives more significant and faster results in bone formation in the damaged part, and the healing process is owned faster. From these two methods, it can be concluded that the LMHFV method provides a similar healing effect than the PEMF method. Applying the LMHFV and PEMF method to bone fractures gives more significant and faster results in bone formation in the damaged part. In addition, the healing process is owned faster.
Structure Identification of Nanopowder TiO2 Synthesized by Coprecipitation Method: Vicran Zharvan, Gatut Yudoyono, Darminto Darminto Vicran Zharvan Vicran Zharvan; Gatut Yudhoyono Gatut Yudhoyono; Darminto Darminto
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.15475

Abstract

Titanium dioxide, or TiO2 is a semiconductor material with many advanced applications, such as photocatalysts. Generally, TiO2 has three primary forms of crystal structure: anatase, brookite, and rutile. Among these types of crystal structures, anatase has good properties in photocatalysts application due to its band gap value (3.20eV) and stability. Further, there are many methods to synthesize TiO2, such as sol-gel, hydrothermal method, etc. Still, the copreciptation method has a suitable method because it is easy to produce, high pure product and low cost. However, many parameters control the quality of TiO2 itself: pH, temperature, time and mechanical process. Especially for the mechanical process, no results were reported about structure identification of TiO2 at mixing time below 25 hours. In this research, titanium dioxide (TiO2) powder has been investigated using coprecipitation method and TiCl3 as a raw material. The TiO2 was synthesized by mixing the time duration at 5, 10 and 25 hours in this method. Analysis using x-ray diffraction shows that all the samples have an anatase phase. Further, Rietveld refinement analysis shows that mixing duration time does not significantly affect the lattice parameters.
Characterization of Cough Sounds Based on Measured Sound Pressure Levels from Arduino-Based MAX9814 Sound Sensor: Aris widodo, Muktamar Cholifah Aisiyah Aris Widodo Aris Widodo; Muktamar Cholifah Aisiyah Muktamar Cholifah Aisiyah
Jurnal Fisika dan Aplikasinya Vol 19 No 1 (2023): January 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14432

Abstract

Research has been conducted on the characterization of coughing sounds based on the measured sound pressure level of the Arduino-based MAX9814 sound sensor to determine the characteristics of coughing sounds based on the Sound Pressure Level (SPL). This research method is carried out by designing sound sensor hardware and software using the MAX9814 sound sensor. After that, recording the coughing sound data from the cough voice coswara respondent data set using a sound sensor and converting it to SPL data. After that, the cough SPL data was analyzed from the SPL cycle graph during recording and the cough phase pattern. And the resulting characterization of coughing sound based on coughing pressure using an Arduino-based MAX9814 sound sensor produced a coughing sound character in terms of sound pressure level (SPL) based on the expulsive phase and the intermediate phase of coughing. The expulsive phase indicator is emphasized the intensity of occurrence and density in one cycle of recording coughing sounds. And for the intermediate phase based on the drop rate of the SPL back to the SPL position without coughing. The SPL of cough detected by the MAX9814 sound sensor is ±80dB.
Development of Chobmons Prototype: Cholesterol and Blood Sugar Level Monitoring System Based on Internet of Things (IoT) using Blynk Application: Heni Sumarti, Tria Nurmar’atin, Hamdan Hadi Kusuma, Istikomah Istikomah, Irman Said Prastyo Heni Sumarti Heni Sumarti; Tria Nurmar’atin Tria Nurmar’atin; Hamdan Hadi Kusuma Hamdan Hadi Kusuma; Istikomah Istikomah; Irman Said Prastyo Irman Said Prastyo
Jurnal Fisika dan Aplikasinya Vol 18 No 3 (2022): October 2022 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i3.12532

Abstract

In the era of the industrial revolution 4.0, we need remote technology and products that d not created new medical waste piles. An unhealthy lifestyle can cause many diseases, either degenerative diseases, namely over rate cholesterol and blood sugar level. High cholesterol and blood sugar levels are causes of major influence on atherosclerosis, stroke, micro-vascular, and cardiovascular complications. We offer a non-invasive cholesterol and blood sugar monitoring device based on red LED and infrared light absorption using the Nellcor DS-100A sensor. This technology can help reduce cumulative medical waste and help health workers to monitor patients remotely. This study used ten random samples to calibrate cholesterol and blood sugar levels. The coefficient of determination values were 0.9580 and 0.9581, respectively, which gave excellent values so that the study is continued by collecting data. Data retrieval use 20 random sample data to measure cholesterol and blood sugar levels, the average accuracy prototype is 90.26% and 91.16%, respectively. It shows great potential in determining estimation value at cholesterol and blood sugar levels. The monitoring system can show the data on the LCD display in Blynk Application with the average time required of 1.07 s.
The Metallicity of the Sun Reviewed from Pre-Main Sequence Evolution: Putri Indriani, Aprilia Aprilia Putri Indriani Putri Indriani; Aprilia Aprilia
Jurnal Fisika dan Aplikasinya Vol 18 No 3 (2022): October 2022 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i3.12791

Abstract

Metallicity is defined as the fraction of the abundance of elements heavier than hydrogen and helium. Metallicity has different values for different stellar objects and its value will also change as the star evolves. This research is focused on calculating and analyzing the early metallicity of the Sun, that is at the beginning of the Sun's evolution at the Pre-Main Sequence. Five metallicity samples with an initial mass of 1 Mo were used. This study uses the evolution code MESA r-15140 which produces a Hertzsprung-Russell diagram with various metallicities. From the simulation, it is found that the most suitable metallicity is 0.065. There are four dominant elements at the core of the Sun, namely hydrogen, helium, carbon, and oxygen. The density, pressure, and temperature values at the core of the Sun also increase with age.
Analysis of Vegetation Density and Surface Temperature in Buahbatu District, Bandung using Landsat 8 Oli/Tirs Satellite Images: Riki Purnama Putra, Rena Denya Agustina, Khansa Qurratu’ Aini, Kanya Adwasyifa Riki Purnama Putra Riki Purnama Putra; Rena Denya Agustina Rena Denya Agustina; Khansa Qurratu’ Aini Khansa Qurratu’ Aini; Kanya Adwasyifa Kanya Adwasyifa
Jurnal Fisika dan Aplikasinya Vol 18 No 3 (2022): October 2022 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i3.12739

Abstract

Urban Heat Island is a phenomenon of increasing temperature that occurs in the city area compared to the surrounding area. Urban Heat Island is caused by reduced vegetation due to changes in rural land use to urban areas. This study was conducted to analysis the relation between vegetation density (NDVI) and surface temperature (LST) in Buahbatu District as an effort to control the impact of the Urban Heat Island phenomenon. This research was conducted by processing data from Landsat 8 OLI/TIRS satellite images in 2019-2020, namely from May to October 2019 and May to October 2020. Data collection was carried out through Google Earth Engine to retrieve geospatial data visualization (satellite imagery) and USGS to download Landsat 8 satellite imagery on Bands 4 and 5, then the data is processed using Arcmap, and Pearson correlation test is performed on SPSS. The results obtained are a correlation between vegetation density and surface temperature. In Buahbatu District, the correlation between vegetation density and surface temperature shows a value of (-.403*) in 2019 and (-.386*) in 2020. Both show a negative correlation, which means that if an area has high vegetation density, the surface temperature will decrease, and vice versa. In addition, Buahbatu District gets a good UHI with an NDVI above 0.25, and an LST below 30 but not less than 25.
Performance Analysis of Cone Basin-Based Gravitational Water Vortex Power Plant (GWVPP) by Variations in the Number of Blades: Iim Fatimah, Haswin Dian Fathoni, Bachtera Indarto Iim Fatimah Iim Fatimah; Haswin Dian Fathoni Haswin Dian Fathoni; Bachtera Indarto Bachtera Indarto
Jurnal Fisika dan Aplikasinya Vol 18 No 3 (2022): October 2022 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i3.14496

Abstract

The electricity supply is not evenly distributed for all regions in Indonesia. This is due to the lack of transportation access to reach these areas because of difficult terrain conditions. One of abundant energy sources available in nature is water, which can be used for micro-level power generation. Micro hydro generator usually uses a waterfall with a high head. However, not all of the water flow has a head tall. Therefore, this study proposes a promising prototype of a cone basin-based Gravitational Water Vortex Power Plant (GWVPP). The purpose of this study is to determine the performance of the cone basin-based GWVPP prototype by variation in the number of blades. The vortex turbine is designed with a water flow rate of 169.63 liters/minute and a cone basin with square-shaped blades and variations in the number of blades, namely 2, 4, and 6, with the same turbine blade area of 0.01 m2 . It was found that an increase in the number of blades enhances mechanical characteristics of, e.g. torque and rotational speed, as well as electrical characteristics, e.g. voltage, current, and electric power. The maximum result is achieved when the number of blades is six with the rated power of 5 mW and the rotation speed of 119.351 rpm.

Page 48 of 61 | Total Record : 604

 46   47   48   49   50 

Filter by Year

2005 2025


Reset
Filter By Issues
All Issue Vol 21 No 3 (2025): Okt 2025 Edition Vol 21 No 2 (2025): June 2025 Edition Vol 21 No 1 (2025): January 2025 Edition Vol 21, No 3 (2025) Vol 21, No 2 (2025) Vol 21, No 1 (2025) Vol 20 No 3 (2024): October 2024 Edition Vol 20 No 2 (2024): June 2024 Edition Vol 20 No 1 (2024): January 2024 Edition Vol 20, No 3 (2024) Vol 20, No 2 (2024) Vol 20, No 1 (2024) Vol 19 No 3 (2023): October 2023 Edition Vol 19 No 2 (2023): June 2023 Edition Vol 19 No 1 (2023): January 2023 Edition Vol 19, No 3 (2023) Vol 19, No 2 (2023) Vol 19, No 1 (2023) Vol 18 No 3 (2022): October 2022 Edition Vol 18 No 2 (2022): Juni 2022 Edition Vol 18 No 1 (2022): January 2022 Edition Vol 18, No 3 (2022) Vol 18, No 2 (2022) Vol 18, No 1 (2022) Vol 17 No 3 (2021): October 2021 Edition Vol 17 No 2 (2021): June 2021 Edition Vol 17 No 1 (2021): January 2021 Edition Vol 17, No 3 (2021) Vol 17, No 2 (2021) Vol 17, No 1 (2021) Vol 16 No 3 (2020): October 2020 Edition Vol 16 No 2 (2020): June 2020 Edition Vol 16 No 1 (2020): January 2020 Edition Vol 16, No 3 (2020) Vol 16, No 2 (2020) Vol 16, No 1 (2020) Vol 15 No 3 (2019): October 2019 Edition Vol 15 No 2 (2019): June 2019 Edition Vol 15 No 1 (2019): January 2019 Edition Vol 15, No 3 (2019) Vol 15, No 2 (2019) Vol 15, No 1 (2019) Vol 15, No 1 (2019) Vol 14 No 3 (2018): October 2018 Edition Vol 14 No 2 (2018): June 2018 Edition Vol 14 No 1 (2018): January 2018 Edition Vol 14, No 3 (2018) Vol 14, No 2 (2018) Vol 14, No 1 (2018) Vol 13 No 3 (2017): October 2017 Edition Vol 13 No 2 (2017): June 2017 Edition Vol 13 No 1 (2017): January 2017 Edition Vol 13, No 3 (2017) Vol 13, No 2 (2017) Vol 13, No 1 (2017) Vol 12, No 3 (2016) Vol 12, No 2 (2016) Vol 12, No 1 (2016) Vol 11, No 3 (2015) Vol 11, No 2 (2015) Vol 11, No 1 (2015) Vol 10, No 3 (2014) Vol 10, No 2 (2014) Vol 10, No 1 (2014) Vol 9, No 3 (2013) Vol 9, No 2 (2013) Vol 9, No 1 (2013) Vol 9, No 1 (2013) Vol 8, No 2 (2012) Vol 8, No 1 (2012) Vol 7, No 2 (2011) Vol 7, No 1 (2011) Vol 6, No 2 (2010) Vol 6, No 1 (2010) Vol 5, No 2 (2009) Vol 5, No 1 (2009) Vol 4, No 2 (2008) Vol 4, No 1 (2008) Vol 3, No 2 (2007) Vol 3, No 1 (2007) Vol 2, No 2 (2006) Vol 2, No 2 (2006) Vol 2, No 1 (2006) Vol 1, No 2 (2005) Vol 1, No 1 (2005) More Issue