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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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Improvement of Soundscapes Based on Noise Control in Urban Forest as an Effort to Fulfill Quality of Green Open Space Standards: Suyatno Suyatno, Lailatul Inayah, Susilo Indrawati Suyatno Suyatno; Lailatul Inayah Lailatul Inayah; Susilo Indrawati Susilo Indrawati
Jurnal Fisika dan Aplikasinya Vol 18 No 1 (2022): January 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.v18i1.12040

Abstract

Urban forests play an important role in green open spaces. Urban forests have aesthetic functions and social functions that refer to the quality standards. Urban noise causes city forest soundscapes to be less comfortable and less aesthetic so that its function as a green open space is not fulfilled. This study aims to improve the quality of sound in urban forests (soundscape) based on the quality of green open space standards through noise control and find out the type of improvement most preferred by visitors. The quality of standard of green open space is pursued through sound masking, active noise cancellation, and convolution in sound signal conditioning. The convoluted sound signal is traffic noise with a convolved signal in the form of bird noise, water rush, and relaxation music. From the results of the improvement of the sound signal then tested on 30 respondents through a comparison test method. 
Design and Manufacturing Audio Bioharmonic Technology with Manipulate Peak Frequencies for Crop Field: Refpo Rahman Refpo Rahman Refpo Rahman
Jurnal Fisika dan Aplikasinya Vol 17 No 3 (2021): October 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9715

Abstract

Applied physics can be involved and integrated with various fields of science. Sonic bloom technology by utilizing sound waves in fact can increase plant growth. This research is the development of the audio bioharmonic (ABH) device to create an efficient, practical, and easy-to-use for farmers. The design and manufacturing of an ABH device based on an Arduino UNO Atmega 328p with manipulated frequencies have been done. The original sound source of Garengpung (Dundubia Manifera) was manipulated around the range of 3000-5000 Hz and the frequency spectrum was calculated using Fast Fourier Transform (FFT) analysis. The results show that the peak frequencies obtained are 3241, 4167, and 4963 Hz as the sound sources of mp3 files. Furthermore, the ABH device was validated by comparing the results of the FFT analysis of the sound source of the mp3 files with the sound recording of the ABH device. As the result, the deviations of the peak frequency obtained are 259, 140, and 172 Hz. And the last, the sound pressure levels (SPL) of audio bioharmonic output at different frequencies are measured using a sound level meter in real-time for 30 minutes. All frequencies have stable SPL at 80-100 dB.
Dye Sensitized Solar Cell (DSSC) Efficiency Derived from Natural Source: Muhammad Fajri Maulana, Elvan Yuniarti, Ai Nurlaela, Sitti Ahmiatri Saptari Muhammad Fajri Maulana Muhammad Fajri Maulana; Elvan Yuniarti Elvan Yuniarti; Ai Nurlaela Ai Nurlaela; Sitti Ahmiatri Saptari Sitti Ahmiatri Saptari
Jurnal Fisika dan Aplikasinya Vol 17 No 3 (2021): October 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9616

Abstract

Dye Sensitized Solar Cell (DSSC) with natural dye from Leunca fruit (Solanum Nigrym L) and Jamblang fruit (Syzygium Cumini L) extract as sensitizer has been created. This DSSC is composed of ZnO doping TiO2 using milling tool for 30 minutes which would be used as photoelectrodes. This study used two natural dyes which are Leunca and Jamblang fruit. The characterizations were performed to examine crystal structure of ZnO-TiO2 with XRD, to measure ZnO-TiO2 particle size with SEM, to examine optical properties from the dye using UV-Vis spectrophotometer, and to run an electrical test to find the efficiency from DSSC. The results indicate that the use of Jamblang fruit as sensitizer is better than Leunca fruit. This is because Jamblang fruit extract has light absorption area on the range of 250 - 800 nm which is higher absorbance than that of Leunca fruit. In addition, the milling time applied was found to be not long enough to produce semiconductor with smaller crystal size. The electrical test result shows Jamblang fruit based DSSC performance is better than Leunca fruit. The maximum power output values are 4.01 x 10-8 Watt with the efficiency of 22.57 x 10-4 % and 2.16 x 10-7 Watt with efficiency of 6.02 x 10-4 % when radiated with Halogen lamp and sunlight, respectively. Aside from the fact that the preparation technique is relatively easy, natural dye material can be found abundantly in nature and its price is also cheap, hence this study is very promising. However, several changes are needed to gain better results. The brief of this research is to develop alternative energy from solar energy, so that its use can be maximized as environmentally-friendly energy source.
Mapping the Potential Liquefaction Area in Yogyakarta City Based on Ground Shear Strain Data: Ilham Ilham, Urip Nurwijayanto Prabowo, Sismanto Sismanto Ilham Ilham Ilham Ilham; Urip Nurwijayanto Prabowo Urip Nurwijayanto Prabowo; Sismanto Sismanto
Jurnal Fisika dan Aplikasinya Vol 17 No 3 (2021): October 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9561

Abstract

The appearance of liquefaction phenomena in some places in Yogyakarta city due to the 2006 earthquake indicates that the sediment in this area has a high potential to liquefy. Three main factors that caused liquefaction are ground shaking, lithological conditions, and groundwater depth. This study aims to investigate one of the three factors i.e ground shaking. For this purpose, the ground shear strain (GSS) data were analyzed for mapping the potential liquefaction area in Yogyakarta city. They were calculated from the seismic vulnerability index and PGA. The seismic vulnerability index was analyzed from a microtremor single station data recorded in 110 sites while PGA was calculated using a reference of the 2006 earthquake. The GSS value in the study area is at a range of 2.0 × 10-4 to 5.8 × 10-3 . In this range, the soils begin to be elastic-plastic so that they are susceptible to be fracture and settlement. The high GSS correlates with the location of the liquefaction due to the 2006 earthquake. The liquefaction potential map was obtained by comparing the GSS with liquefaction sites. The high liquefaction potential is located in the southern part of Yogyakarta city covering Mantrijeron, Mergangsan, Pakualaman, Umbulharjo, and Kotagede districts.
A Structural Investigation of T’-Pr2-xCexCuO4 nanocrystals with x = 0.13: Putu Eka Dharma Putra, I Gede Arjana, Budi Haryanto, Resky Irfanita, Malik Anjelh Baqiya, Darminto Darminto Putu Eka Dharma Putra Putu Eka Dharma Putra; I Gede Arjana I Gede Arjana; Budi Hariyanto Budi Hariyanto; Resky Irfanita Resky Irfanita; Malik Anjelh Baqiya Malik Anjelh Baqiya; Darminto Darminto
Jurnal Fisika dan Aplikasinya Vol 17 No 3 (2021): October 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9720

Abstract

This report is briefly investigating the structural defect information of T’-Pr2-xCexCuO4 (T’-PCCO) nanocrystals with x = 0.13 at three different calcination temperatures. The as-synthesized powder of Pr2-xCexCuO4 (PCCO) nanocrystals with x = 0.13 were synthesized by using the chemically dissolved method within three different calcination temperatures, namely 900oC, 950oC, and 1000oC for 15 h in air. X-ray diffraction (XRD) technique is used to characterize the phase, structural, and crystalline defect information on the nanocrystal powder. It is found that all the indexed peaks are confirmed as PCCO phase with space group of I4/mmm and a minor impurity of Fm-3m space group. The lattice parameters are confirmed to be fluctuated signifying the stability of the Coulomb force at those temperatures. The post-Rietveld analysis using Bond Valance Sum (BVS) calculation shows the Ce-dependent of T’-PCCO nanocrystals while the Fourier difference suggests that the created crystalline defect as a part of the tetravalent doping effect which binds stronger apical oxygen. Moreover, at Pr- and Cu-site, the scattering distribution are fluctuating with the stable structure at 1000oC. This initial structural information is worth complementing the fundamental feature for understanding the T’-type cuprates.
Numerical Study of Motion of a Cylinder Filled with Water on an Inclined Plane using Scilab: Marini Amalia Ocvianti, Yudhiakto Pramudya, Moh Irma Sukarelawan Marini Amalia Ocvianti Marini Amalia Ocvianti; Yudhiakto Pramudya Yudhiakto Pramudya; Moh Irma Sukarelawan Moh Irma Sukarelawan
Jurnal Fisika dan Aplikasinya Vol 17 No 3 (2021): October 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.8853

Abstract

The velocity of the rolling motion is influenced by the shape of the object and its rotating axis. The cylinder motion on inclined plane has been investigated by number of research. However, the water filled cylinder need to be investigated further especially on the possibility moving sliding and rolling. Numerical study has been carried out on water filled cylinder modelling of frictionless sliding motion of point object, frictionless rolling motion, and rolling motion with friction on an inclined plane. By using the Euler method, data processing is carried out with the Scilab application. The resulting graph from running Scilab coding is a graph of v vs t and x vs t. We found the frictionless sliding motion produces the greatest velocity and distance because it is not influenced by friction and the object’s moment of inertia. Solid cylinder rolling with friction on an inclined plane produces the smallest velocity and distance due to the influence of friction and the moment of inertia of the object. These results indicate that a water filled cylinder can be considered a solid cylinder if ignoring all internal motion of water inside the cylinder.
Synthesis and Characterization of TiO2 from Lampung’s Iron Sand using Leaching Method with Temperature Variation: Iqbal Firdaus, Anggi Stevani, Yudhistira Novita Handayani, Nadia Febriyanti, Roniyus Marjunus, Posman Manurung Iqbal Firdaus Iqbal Firdaus; Anggi Stevan Anggi Stevan; Yudhistira Novita Handayani Yudhistira Novita Handayani; Nadia Febriyanti Nadia Febriyanti; Roniyus Marjunus Roniyus Marjunus; Posman Manurung Posman Manurung
Jurnal Fisika dan Aplikasinya Vol 17 No 2 (2021): June 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.7921

Abstract

Ilmenite is a natural material in the form of sand which contains heavy metal minerals that are very abundant in Lampung province. This research aims to determine the content of TiO2 from Lampungs iron sand by leaching method with temperature variation. The iron sand are mixed with sodium hydrogen carbonate (NaHCO3), then heated at 7000 C for an hour. This research uses 5 samples with leaching temperature variation of 70, 80, 90, 100, and 1100 C for 2 hours. The acid leaching process uses HCl 12 M with a ratio of iron sand and HCl of 1:4, while the water leaching process uses 50 ml of distilled water. Furthermore, the samples are characterized using XRD and XRF to determine TiO2 content in the iron sand. The result shows that the highest amount of TiO2 is obtained in the sample with the leaching temperature of 1100 C for 2 hours, which is approximately 61%.
Reducing the Electrical Conductivity of ZnO/Ag Nanofiller for Solid Polymer Electrolytes Prepared by Laser Ablation in Polylactic Acid Solution: Permono Adi Putro, Nurfina Yudasari, Yulia Irdawati, Ahmad S. Sulaeman, Akhiruddin Maddu Permono Adi Putro Permono Adi Putro; Nurfina Yudasari Nurfina Yudasari; Yulia Irdawati Yulia Irdawati; Ahmad S. Sulaeman Ahmad S. Sulaeman; Akhiruddin Maddu Akhiruddin Maddu
Jurnal Fisika dan Aplikasinya Vol 17 No 2 (2021): June 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.8135

Abstract

Solid polymer electrolytes (SPEs) are vital components of fast appearing technology for energy storage-conversion devices. Here, SPEs based on silver (Ag) and zinc oxide (ZnO) nanoparticles are prepared by laser ablation in polylactic acid (PLA) at room temperature. The comparison study of PLA, PLA-ZnO, PLA-ZnO/Ag, and PLA-Ag -based SPEs is conducted in pursuance of the electrical conductivity obtained from electrochemical impedance spectroscopy (EIS) characterization. EIS provides comprehensive analyses, including DC and AC conductivities, dielectric constant, and electrical modulus of the samples. Our results show that PLA-ZnO exhibits an appreciable value of DC conductivity, which insignificantly decreases by Ag existence into PLA-ZnO/Ag. This study suggests that PLA-ZnO remains stable by Ag incorporation; hence, PLA-ZnO/Ag has a great potential as SPEs.
Spin-Orbit Effect on Thermal Properties of Half-Heusler Alloy FeVSb: Anugrah Azhar Anugrah Azhar Anugrah Azhar
Jurnal Fisika dan Aplikasinya Vol 17 No 2 (2021): June 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.8973

Abstract

FeVSb, a family of Half-Heusler alloy, is categorized as an n-type semiconductor which has a high figure of merit that makes this material to be one of the promising candidates for a thermoelectric device. In FeVSb, Fe and V atoms which have d-orbitals can be considered to have spin-orbit interaction that can affect the electronic structure and thermal properties of this material. In order to investigate how strong the spin-orbit interaction affect this material, we do the first-principles study by implementing the spin-orbit interaction to investigate the change of the band structure and thermal properties of FeVSb. Our results show that the spin-orbit interaction affects the band structure of the material indicated by the energy splitting in the electronic structure which increase the Seebeck coefficient, electrical conductivity, and thermal conductivity but slightly reduce the figure of merit values of FeVSb.
Development of Magnetic Functional Materials Based on Carbon/Manganite/Ferrite Composites for Microwave Absorber Materials Applications: Maya Puspitasari Izaak, Yohanes Edi Gunanto, Henni Sitompul, Wisnu Ari Adi Maya Puspitasari Izaak Maya Puspitasari Izaak; Yohanes Edi Gunanto Yohanes Edi Gunanto; Henni Sitompul Henni Sitompul
Jurnal Fisika dan Aplikasinya Vol 17 No 2 (2021): June 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.8978

Abstract

The synthesis of carbon/manganite/ferrite composite materials for microwave absorber applications has been successfully carried out with variations in the composition of 15:55:30 and 15:45:40 (wt%). This composition was successfully confirmed based on the analysis of the X-ray diffraction pattern using the GSAS program. The refinement results show that each phase of each composite has a good structure. Based on surface morphological observations, it is known that the composite samples have varying particle sizes of around 150-500 nm which are evenly distributed over the entire surface of the sample. The result of the microwave absorption analysis implies that the difference in composition results in a slight increase of the reflection loss and the presence of a new absorption peak at a frequency of 4.36 GHz. Our result underlines that the characteristic of microwave absorption in composites is insignificantly influenced by the composition of the material as the absorption properties are mainly affected by the respective phases that form it, not by the entire phase of the composite.

Page 50 of 61 | Total Record : 604

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