Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.52916
Isa Isnawanti, Dwi Satya Palupi
Telah dilakukan kajian persamaan diferensial stokastik bagi pergerakan kurs mata uang. Kajian terhadap rapat peluang return perlu dilakukan karena rapat peluang return menggambarkan fluktuasi kurs mata uang serta mencerminkan interaksi yang terjadi di pasar keuangan. Pada penelitian ini return kurs mata uang diasumsikan mengikuti proses stokastik yang dapat digambarkan oleh suatu persamaan diferensial stokastik, sehingga distribusi rapat peluang return dapat digambarkan oleh persamaan Fokker-Planck. Data yang digunakan pada penelitian ini adalah kurs mata uang IDR/USD dari Januari 2001 sampai Januari 2021 yang diperoleh dari data kurs transaksi Bank Sentral Republik Indonesia. Distribusi rapat peluang return harian yang diperoleh mengikuti distribusi Gaussian dengan rata-rata −0, 0001 dan sigma = 0, 0048. Berdasarkan distribusi tersebut dapat dibentuk persamaan diferensial stokastik bagi return kurs mata uang IDR/USD.
{"title":"Kajian Teoritik Persamaan Diferensial Stokastik bagi Kurs Mata Uang (Forex), Kajian Khusus : Kurs IDR/USD","authors":"Isa Isnawanti, Dwi Satya Palupi","doi":"10.13057/ijap.v13i1.52916","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.52916","url":null,"abstract":"Telah dilakukan kajian persamaan diferensial stokastik bagi pergerakan kurs mata uang. Kajian terhadap rapat peluang return perlu dilakukan karena rapat peluang return menggambarkan fluktuasi kurs mata uang serta mencerminkan interaksi yang terjadi di pasar keuangan. Pada penelitian ini return kurs mata uang diasumsikan mengikuti proses stokastik yang dapat digambarkan oleh suatu persamaan diferensial stokastik, sehingga distribusi rapat peluang return dapat digambarkan oleh persamaan Fokker-Planck. Data yang digunakan pada penelitian ini adalah kurs mata uang IDR/USD dari Januari 2001 sampai Januari 2021 yang diperoleh dari data kurs transaksi Bank Sentral Republik Indonesia. Distribusi rapat peluang return harian yang diperoleh mengikuti distribusi Gaussian dengan rata-rata −0, 0001 dan sigma = 0, 0048. Berdasarkan distribusi tersebut dapat dibentuk persamaan diferensial stokastik bagi return kurs mata uang IDR/USD.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43851896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.41577
Y. Yulianto, Z. Su’ud
Many intense experimental and theoretical studies have been performed to understand the behavior of fusion reactions, especially related to the barrier height of the interacting nuclei. This preliminary study would discuss a variation of the applicability of the Glas-Mosel formula with a little bit of modification applied to heavy systems. The modified Glas-Mosel formula has been utilized to calculate the fusion cross-sections of (O-16)+(Ge-70,72,73,74,76). To perform the differential and the optimization numerics, the Finite Difference and Nelder-Mead methods were applied to Fortran script-code respectively to assist the computational process. Referring to the obtained results, it can be indicated that the obtained results are in positive agreement with the experimental data. In addition, the modified Glas-Mosel formula proposed in this study has the capability to explain the experimental results or in predicting the fusion cross-section of nuclei. Further investigations are needed to get the crucial data to serve as a basic reference.
{"title":"The Modified Glas-Mosel Formula for Numerical Investigation of the Fusion Cross-Sections of (O-16)+(Ge-70,72,73,74,76) - A Preliminary Study","authors":"Y. Yulianto, Z. Su’ud","doi":"10.13057/ijap.v13i1.41577","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.41577","url":null,"abstract":"Many intense experimental and theoretical studies have been performed to understand the behavior of fusion reactions, especially related to the barrier height of the interacting nuclei. This preliminary study would discuss a variation of the applicability of the Glas-Mosel formula with a little bit of modification applied to heavy systems. The modified Glas-Mosel formula has been utilized to calculate the fusion cross-sections of (O-16)+(Ge-70,72,73,74,76). To perform the differential and the optimization numerics, the Finite Difference and Nelder-Mead methods were applied to Fortran script-code respectively to assist the computational process. Referring to the obtained results, it can be indicated that the obtained results are in positive agreement with the experimental data. In addition, the modified Glas-Mosel formula proposed in this study has the capability to explain the experimental results or in predicting the fusion cross-section of nuclei. Further investigations are needed to get the crucial data to serve as a basic reference.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43727417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v12i2.65252
M. Hutagalung, Iwan Setiawan, Dedy Hamdani
This research is a theoretical research by reviewing the literature that discusses the method of accelerating quantum dynamics adiabatically. This method for accelerating quantum dynamics is so- called the fast-forward method. This method was proposed by Masuda and Nakamura in 2010. In this method, the ground state and first excited state wave function is modified by adding an additional term to the wave function which is called the adiabatic phase. This is done so that the time-dependent Schrodinger equation remains fulfilled. The accelerating process is carried out using an adiabatic parameter that goes to zero. Fast-forward method is applied first to get the adiabatic phase. Furthermore, by reviewing the wave function at the ground state and first excited state we get the adiabatic phase which ensures that the harmonic oscillator can move from the initial state to the final state in a shorter time.
{"title":"Kajian Literatur Fase Adiabatik untuk mempercepat Dinamika Kuantum Adiabatik pada Osilator Harmonik","authors":"M. Hutagalung, Iwan Setiawan, Dedy Hamdani","doi":"10.13057/ijap.v12i2.65252","DOIUrl":"https://doi.org/10.13057/ijap.v12i2.65252","url":null,"abstract":"This research is a theoretical research by reviewing the literature that discusses the method of accelerating quantum dynamics adiabatically. This method for accelerating quantum dynamics is so- called the fast-forward method. This method was proposed by Masuda and Nakamura in 2010. In this method, the ground state and first excited state wave function is modified by adding an additional term to the wave function which is called the adiabatic phase. This is done so that the time-dependent Schrodinger equation remains fulfilled. The accelerating process is carried out using an adiabatic parameter that goes to zero. Fast-forward method is applied first to get the adiabatic phase. Furthermore, by reviewing the wave function at the ground state and first excited state we get the adiabatic phase which ensures that the harmonic oscillator can move from the initial state to the final state in a shorter time.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46253308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.65447
Eddy Mirnanda, Alfalah Adam Saputra, L. Arifin
Research has been conducted in the Palembang and surroundings areas using gravity data with the aim of knowing the basin structure that has hydrocarbon potential based on 2D and 3D modeling. The Palembang and surroundings areas is one of the regions that has hydrocarbon potential which is characterized by several Sub-Basins namely the South Jambi Sub-Basin, the North Palembang Sub-Basin, and the West Palembang Sub-Basin. The study area has a Complete Bouguer Anomaly value (CBA) between +21 mGal to +55 mGal. Based on 2D modeling, rocks with a density value of around 2.35 gr/cm3 are identified as reservoir zones located in the Talang Akar Formation with depths of around 4000 meters to 5000 meters below the surface. Rocks with density values between 2.35 gr/cm3 to 2.40 gr/cm3 are identified assealsin the form of shale as cover rocks that are good at trapping hydrocarbons. In 2D modeling there are fault structures in the form of normal faults and reverse faults that are identified based on analysis Second Vertical Derivative (SVD). Based on 3D gravity inversion modeling, the reservoirzone was found to be at a depth of about 4000 meters to 5000 meters below the surface which has a density value between 2.31 gr/cm3 to 2.53 gr/cm3.
{"title":"Identifikasi Struktur Bawah Permukaan berdasarkan Analisis Data Gayaberat di Daerah Palembang dan sekitarnya sebagai Cekungan Potensi Hidrokarbon","authors":"Eddy Mirnanda, Alfalah Adam Saputra, L. Arifin","doi":"10.13057/ijap.v13i1.65447","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.65447","url":null,"abstract":"Research has been conducted in the Palembang and surroundings areas using gravity data with the aim of knowing the basin structure that has hydrocarbon potential based on 2D and 3D modeling. The Palembang and surroundings areas is one of the regions that has hydrocarbon potential which is characterized by several Sub-Basins namely the South Jambi Sub-Basin, the North Palembang Sub-Basin, and the West Palembang Sub-Basin. The study area has a Complete Bouguer Anomaly value (CBA) between +21 mGal to +55 mGal. Based on 2D modeling, rocks with a density value of around 2.35 gr/cm3 are identified as reservoir zones located in the Talang Akar Formation with depths of around 4000 meters to 5000 meters below the surface. Rocks with density values between 2.35 gr/cm3 to 2.40 gr/cm3 are identified assealsin the form of shale as cover rocks that are good at trapping hydrocarbons. In 2D modeling there are fault structures in the form of normal faults and reverse faults that are identified based on analysis Second Vertical Derivative (SVD). Based on 3D gravity inversion modeling, the reservoirzone was found to be at a depth of about 4000 meters to 5000 meters below the surface which has a density value between 2.31 gr/cm3 to 2.53 gr/cm3.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42694986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.69418
Masruroh Masruroh, R. Tjahjanto, Gancang Saroja, D. Santjojo
The sensitivity of a QCM-based VOCs sensor with two kinds of a metal phthalocyanine, i.e., copper phthalocyanine (CuPc) and zinc phthalocyanine (ZnPc) was examined for various VOCs. The sensitivity of the two metal phthalocyanine was determined by the compatibility of the overlapped metal orbitals (Cu(II) dan Zn(II)) and the corresponding VOCs. The CuPc and the ZnPc layer were deposited on the quartz crystal oscillator by a vacuum evaporation method. The frequency shift and the sensitivity of the sensors with the two functional layers were tested using 5 VOCs: formaldehyde, propanol, ethanol, toluene, and ketone. The CuPc sensor showed the highest sensitivity to formaldehyde. On the other hand, the ZnPc was highly sensitive to ethanol.
{"title":"Functionalized Copper Phthalocyanine and Zinc Phthalocyanine as a Coating Layer on the Sensitivity of QCM-Based VOCs Sensor","authors":"Masruroh Masruroh, R. Tjahjanto, Gancang Saroja, D. Santjojo","doi":"10.13057/ijap.v13i1.69418","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.69418","url":null,"abstract":"The sensitivity of a QCM-based VOCs sensor with two kinds of a metal phthalocyanine, i.e., copper phthalocyanine (CuPc) and zinc phthalocyanine (ZnPc) was examined for various VOCs. The sensitivity of the two metal phthalocyanine was determined by the compatibility of the overlapped metal orbitals (Cu(II) dan Zn(II)) and the corresponding VOCs. The CuPc and the ZnPc layer were deposited on the quartz crystal oscillator by a vacuum evaporation method. The frequency shift and the sensitivity of the sensors with the two functional layers were tested using 5 VOCs: formaldehyde, propanol, ethanol, toluene, and ketone. The CuPc sensor showed the highest sensitivity to formaldehyde. On the other hand, the ZnPc was highly sensitive to ethanol.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48532549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v12i2.61245
Graziani Rumbino, Lili Maniambo, Melfi Soll, Gemala Dirgantari, O. Togibasa
Biobattery is an alternative energy device that uses organic waste without hazardous chemicals. It is further reported that tropical almond (Terminalia catappa L.) is rich in glucose content, making it a potential electrolyte for a biobattery device, although the power performance is not optimal. Therefore, this research aims to improve the performance of biobattery from tropical almond paste with the addition of acetic acid. Biobattery cells were constructed using the galvanic cell method, while the tropical almond paste as an electrolyte was stored in a box container with a volume of 600 cm³, then attached with copper and zinc metal plate as cathode and anode. Five typical devices of biobattery were made with various acid concentrations of 0%, 10%, 20%, 40%, and 80% which were added to the electrolyte. The results showed a significant enhancement of power performance, from 0.25 mW without any acid up to 1.62 mW with acid addition. The biobattery from tropical almond paste added with acetic acid of 20% had the best performance. Based on the results, the characterization of this device had an open cell voltage of 0.93, and the power curve showed a peak value of 1.62 mW at a current of 3.29 mA, with a stable current lasting up to 200 hr.
{"title":"Performance Enhancement of Biobattery from Tropical Almond Paste Using Acetic Acid Addition","authors":"Graziani Rumbino, Lili Maniambo, Melfi Soll, Gemala Dirgantari, O. Togibasa","doi":"10.13057/ijap.v12i2.61245","DOIUrl":"https://doi.org/10.13057/ijap.v12i2.61245","url":null,"abstract":"Biobattery is an alternative energy device that uses organic waste without hazardous chemicals. It is further reported that tropical almond (Terminalia catappa L.) is rich in glucose content, making it a potential electrolyte for a biobattery device, although the power performance is not optimal. Therefore, this research aims to improve the performance of biobattery from tropical almond paste with the addition of acetic acid. Biobattery cells were constructed using the galvanic cell method, while the tropical almond paste as an electrolyte was stored in a box container with a volume of 600 cm³, then attached with copper and zinc metal plate as cathode and anode. Five typical devices of biobattery were made with various acid concentrations of 0%, 10%, 20%, 40%, and 80% which were added to the electrolyte. The results showed a significant enhancement of power performance, from 0.25 mW without any acid up to 1.62 mW with acid addition. The biobattery from tropical almond paste added with acetic acid of 20% had the best performance. Based on the results, the characterization of this device had an open cell voltage of 0.93, and the power curve showed a peak value of 1.62 mW at a current of 3.29 mA, with a stable current lasting up to 200 hr.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46474446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.55546
Muhammad Danu Rizkia, Iis Nurhasanah
CeO2 nanoparticles (nanoceria) is a material that posseses antibacterial activity. In this study, nanoceria was combined with chitosan to increase its antibacterial property. The formation of nanoceria-chitosan was analyzed using X-ray diffractometer, Fourier Transform Infrared (FTIR) and UV-Vis Spectrophotometer. The antibacterial activity of nanoceria-chitosan was tested using the disc diffusion method on Escherichia coli bacteria. X-ray diffraction pattern analysis showed that nanoceria-chitosan has a cubic structure. The incorporation of chitosan in nanoceria was identified at a wave number of 2919 cm-1 from the FTIR spectrum. Nanoceria-chitosan showed a smaller crystallite size, a larger energy band gap and better antibacterial activity than nanoceria.
{"title":"Karakteristik Antibakteri Nanoceria-Kitosan yang disintesis menggunakan Metode Presipitasi","authors":"Muhammad Danu Rizkia, Iis Nurhasanah","doi":"10.13057/ijap.v13i1.55546","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.55546","url":null,"abstract":"CeO2 nanoparticles (nanoceria) is a material that posseses antibacterial activity. In this study, nanoceria was combined with chitosan to increase its antibacterial property. The formation of nanoceria-chitosan was analyzed using X-ray diffractometer, Fourier Transform Infrared (FTIR) and UV-Vis Spectrophotometer. The antibacterial activity of nanoceria-chitosan was tested using the disc diffusion method on Escherichia coli bacteria. X-ray diffraction pattern analysis showed that nanoceria-chitosan has a cubic structure. The incorporation of chitosan in nanoceria was identified at a wave number of 2919 cm-1 from the FTIR spectrum. Nanoceria-chitosan showed a smaller crystallite size, a larger energy band gap and better antibacterial activity than nanoceria.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43760380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.56323
Muhammad Al Thariqsyah, I. Ramadhan, S. Sudarmaji
Shear wave splitting is a study that utilizes the differences between arrival times of two shear waves (slow and fast) propagating from a source to a receiver to identify the magnitude of the anisotropic medium through which they propagate. Aside from generating a delay time between two shear waves, the anisotropic medium also shifts the polarization of fast shear wave from its initial polarization which is indicated as the main orientation of the related fracture system. The study was conducted on Landak Field, located around Bukit Besar mountain range by analyzing provided data from December 2011 to April 2012. The results of this study show that the polarizations of fast shear waves in several stations are as following; NE-SW orientation at station R09, R17, R25, and R26, N-S orientation at station R08, and NW-SE orientation at station R17. Not only do these orientations of polarization show a good correlation with structural analysis in this area, but also important to be noted that all microseismic stations encounter a wide-spreading polarization phenomenon as an effect of complex anisotropy. The delay time from all stations ranges from 0.03 to 0.07 seconds. The normalization between delay time and length of ray path for all stations results in a fracture intensity parameter ranging from 0.004 to 0.011 seconds/km. This intensity is measured in slowness parameters, which shows increased value towards the Bukit Besar area, which potentially becomes the upflow zone of the geothermal system. The study shows that the distribution of fracture intensity and pressure have correlation and identical trend with temperature distribution.
{"title":"The Estimation of Fracture Intensity and Pressure Distribution using Analysis of Shear Wave Splitting on “Landak” Geothermal Field","authors":"Muhammad Al Thariqsyah, I. Ramadhan, S. Sudarmaji","doi":"10.13057/ijap.v13i1.56323","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.56323","url":null,"abstract":"Shear wave splitting is a study that utilizes the differences between arrival times of two shear waves (slow and fast) propagating from a source to a receiver to identify the magnitude of the anisotropic medium through which they propagate. Aside from generating a delay time between two shear waves, the anisotropic medium also shifts the polarization of fast shear wave from its initial polarization which is indicated as the main orientation of the related fracture system. The study was conducted on Landak Field, located around Bukit Besar mountain range by analyzing provided data from December 2011 to April 2012. The results of this study show that the polarizations of fast shear waves in several stations are as following; NE-SW orientation at station R09, R17, R25, and R26, N-S orientation at station R08, and NW-SE orientation at station R17. Not only do these orientations of polarization show a good correlation with structural analysis in this area, but also important to be noted that all microseismic stations encounter a wide-spreading polarization phenomenon as an effect of complex anisotropy. The delay time from all stations ranges from 0.03 to 0.07 seconds. The normalization between delay time and length of ray path for all stations results in a fracture intensity parameter ranging from 0.004 to 0.011 seconds/km. This intensity is measured in slowness parameters, which shows increased value towards the Bukit Besar area, which potentially becomes the upflow zone of the geothermal system. The study shows that the distribution of fracture intensity and pressure have correlation and identical trend with temperature distribution.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49129452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.66864
M. I. Nurwidyanto, M. Zainuri, Anindya Wirasatrya, Gatot Yuliyanto
The aim of this study was to obtain a profile for each depth of the subsurface structure of the Semarang coast based on microtremor data. The acquisition of 109 data points in this study was taken using a single-station microtremor tool in the coastal area of Semarang. This study uses the HVSR method to produce the HV curve, amplification factor (A0) and dominant frequency (f0) which can later be used to find the values of vp, vs and vp/vs at each depth. The results obtained in this study include A0 of 0.13 - 5.96, f0 of 0.13 - 7.47 Hz, vs of 154.42 - 1444.404 m/s, vp of 266.40 - 4758.37 m/s and vp/vs of 1,421 – 28,674. Based on the vs analysis, bedrock begins to appear at a depth of 100 m in the eastern and southern parts of West Semarang District and the southern part of North Semarang District. Classification of hard soil, very dense and soft rock from a depth of 100 m shows that it has covered most of the area of Semarang City. However, there are still several areas that still have a medium soil classification, namely most of the areas of Gayamsari District, Genuk District and Pedurungan District, as well as a small part of the area of North Semarang District, West Semarang District and Central Semarang District. Analysis of vp/vs at a depth of 150 m showed a vp/vs classification with a range of 1.4 - 2 in the study area. However, there are still several areas that still have vp/vs values with a value range of 3 – 3.2, namely in the northern part of West Semarang District, eastern Central Semarang District, eastern South Semarang District, northern East Semarang District, northern Gayamsari District, and the central part of Genuk District.
{"title":"Struktur Bawah Permukaan Pantai Semarang berdasarkan Metode HVSR","authors":"M. I. Nurwidyanto, M. Zainuri, Anindya Wirasatrya, Gatot Yuliyanto","doi":"10.13057/ijap.v13i1.66864","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.66864","url":null,"abstract":"<p>The aim of this study was to obtain a profile for each depth of the subsurface structure of the Semarang coast based on microtremor data. The acquisition of 109 data points in this study was taken using a single-station microtremor tool in the coastal area of Semarang. This study uses the HVSR method to produce the HV curve, amplification factor (A<sub>0</sub>) and dominant frequency (f<sub>0</sub>) which can later be used to find the values of v<sub>p</sub>, v<sub>s</sub> and v<sub>p</sub>/v<sub>s</sub> at each depth. The results obtained in this study include A<sub>0</sub> of 0.13 - 5.96, f<sub>0</sub> of 0.13 - 7.47 Hz, v<sub>s</sub> of 154.42 - 1444.404 m/s, v<sub>p</sub> of 266.40 - 4758.37 m/s and v<sub>p</sub>/v<sub>s</sub> of 1,421 – 28,674. Based on the v<sub>s</sub> analysis, bedrock begins to appear at a depth of 100 m in the eastern and southern parts of West Semarang District and the southern part of North Semarang District. Classification of hard soil, very dense and soft rock from a depth of 100 m shows that it has covered most of the area of Semarang City. However, there are still several areas that still have a medium soil classification, namely most of the areas of Gayamsari District, Genuk District and Pedurungan District, as well as a small part of the area of North Semarang District, West Semarang District and Central Semarang District. Analysis of v<sub>p</sub>/v<sub>s</sub> at a depth of 150 m showed a v<sub>p</sub>/v<sub>s</sub> classification with a range of 1.4 - 2 in the study area. However, there are still several areas that still have v<sub>p</sub>/v<sub>s</sub> values with a value range of 3 – 3.2, namely in the northern part of West Semarang District, eastern Central Semarang District, eastern South Semarang District, northern East Semarang District, northern Gayamsari District, and the central part of Genuk District.</p>","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44743670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.13057/ijap.v13i1.67837
I. Irwan, Valentinus Galih Vidia Utra, JulianyNingsih Mohamad
Corona plasma technology has been studied as a surface modification for the adhesive bonding of polymers. Although corona plasma (C.P.) is becoming more popular in nanotechnology, the influence of corona plasma treatment parameters on the FT-IR spectra is a problem that has yet to be addressed. The purpose of this study is to use an artificial neural network to study the influence of corona plasma (C.P.) treatment parameters on textile polymer and evaluate the ability of this model to predict FT-IR spectral information from FT-IR measurements. In this study, polymers were modified under various corona plasma treatment conditions. We investigated FT-IR spectra information of polymers from FT-IR measurements by varying corona plasma treatment variables. We used three input parameters in this study: wavenumber, voltage, and exposure time—two output parameters: fabric roughness with SEM according to the degree of smoothness and percent transmission with FT-IR. The novel aspect of this study is that we used ANN to model the plasma treatment on polyester-cotton fabrics and the FT-IR spectra accurately enough for the first time. According to this study, the model that used four nodes (neurons) in the hidden layer, three input parameters (x1,x2,x3), and 20 iterations is appropriate for determining fabric surface roughness (S.R.) and percent transmission (T%). Based on this research, the values of R2 for determining fabric surface roughness (S.R.) and percent transmission (T%) were 99.79 percent and 67.18 percent, respectively. The results showed that the developed ANNs could accurately predict the experimental data in detail. This study is significant because it uses artificial intelligence to calculate and simulate the FT-IR spectra and fabric surface roughness of plasma treatment on textile fabrics. This study's scientific application is that it will help experts, researchers, and engineers understand the implications of plasma on the chemical structure of textile materials.
{"title":"FT-IR Spectral Model of Polyester-Cotton Fabrics with Corona Plasma Treatment using Artificial Neural Networks (ANNs)","authors":"I. Irwan, Valentinus Galih Vidia Utra, JulianyNingsih Mohamad","doi":"10.13057/ijap.v13i1.67837","DOIUrl":"https://doi.org/10.13057/ijap.v13i1.67837","url":null,"abstract":"Corona plasma technology has been studied as a surface modification for the adhesive bonding of polymers. Although corona plasma (C.P.) is becoming more popular in nanotechnology, the influence of corona plasma treatment parameters on the FT-IR spectra is a problem that has yet to be addressed. The purpose of this study is to use an artificial neural network to study the influence of corona plasma (C.P.) treatment parameters on textile polymer and evaluate the ability of this model to predict FT-IR spectral information from FT-IR measurements. In this study, polymers were modified under various corona plasma treatment conditions. We investigated FT-IR spectra information of polymers from FT-IR measurements by varying corona plasma treatment variables. We used three input parameters in this study: wavenumber, voltage, and exposure time—two output parameters: fabric roughness with SEM according to the degree of smoothness and percent transmission with FT-IR. The novel aspect of this study is that we used ANN to model the plasma treatment on polyester-cotton fabrics and the FT-IR spectra accurately enough for the first time. According to this study, the model that used four nodes (neurons) in the hidden layer, three input parameters (x1,x2,x3), and 20 iterations is appropriate for determining fabric surface roughness (S.R.) and percent transmission (T%). Based on this research, the values of R2 for determining fabric surface roughness (S.R.) and percent transmission (T%) were 99.79 percent and 67.18 percent, respectively. The results showed that the developed ANNs could accurately predict the experimental data in detail. This study is significant because it uses artificial intelligence to calculate and simulate the FT-IR spectra and fabric surface roughness of plasma treatment on textile fabrics. This study's scientific application is that it will help experts, researchers, and engineers understand the implications of plasma on the chemical structure of textile materials.","PeriodicalId":31930,"journal":{"name":"Indonesian Journal of Applied Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48858121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：