Indonesian Journal of Physics最新文献

Magnetoteluric Modelling in High Noise of Low Frequency Signal 低频信号高噪声中的磁流体建模

Indonesian Journal of Physics Pub Date : 2024-02-09 DOI: 10.5614/itb.ijp.2023.34.2.6

Agus Laesanpura, Nindia E. Larasati, A. Sugianto, Wahyu Eko Yunian

{"title":"Magnetoteluric Modelling in High Noise of Low Frequency Signal","authors":"Agus Laesanpura, Nindia E. Larasati, A. Sugianto, Wahyu Eko Yunian","doi":"10.5614/itb.ijp.2023.34.2.6","DOIUrl":"https://doi.org/10.5614/itb.ijp.2023.34.2.6","url":null,"abstract":"Magnetoteluric(MT) modelling geophysics in high noise areas is a challenging task. One part is the precious data for subsurface reconstruction, the other, the noise will a priori annoy the outcome. Through simulation and an example fact in the field, these two phenomena will be discussed. The simulation will propose the ideal model without and with noise, running on the Bostick inversion. Noise varies several schemas in two types of curves. Occam and Bostick algorithms will be used to run the inversion scheme. The trade of the advantages and disadvantages is then compared to a prior model in the field where MT data and geologic cross section are available. Two scenarios are available, one is to use data with treatment using available schema, and the other is to use data by cutting off the noise contaminant segment, and finally to see the resulted through 2D modelling process. The resultant shows the model use the ideal signal without noise through inversion resulting is a better than the other with a noisy signal experiencing treatment, notably in level shallow part. The geologic cross section and gravity model is available to support these results.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140459804","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}

引用次数: 0

Density Functional Theory Simulation of Iron-Montmorillonite as Carbon Dioxide Adsorber 铁蒙脱土作为二氧化碳吸附剂的密度泛函理论模拟

Indonesian Journal of Physics Pub Date : 2024-01-29 DOI: 10.5614/itb.ijp.2023.34.2.5

Husni Ihsudha, T. Wungu, S. Suprijadi, Yoshitada Morikawa

引用次数: 0

Analysis of the Effect of Tube Current, Slice Thickness, and Tube Voltage on Ct Scan Image Noise using the Noise Power Spectrum (NPS) Method 使用噪声功率谱（NPS）方法分析电子管电流、切片厚度和电子管电压对ct扫描图像噪声的影响

Indonesian Journal of Physics Pub Date : 2024-01-04 DOI: 10.5614/itb.ijp.2023.34.2.3

Anggita Ananda Kirei, R. Widita

{"title":"Analysis of the Effect of Tube Current, Slice Thickness, and Tube Voltage on Ct Scan Image Noise using the Noise Power Spectrum (NPS) Method","authors":"Anggita Ananda Kirei, R. Widita","doi":"10.5614/itb.ijp.2023.34.2.3","DOIUrl":"https://doi.org/10.5614/itb.ijp.2023.34.2.3","url":null,"abstract":"This study was conducted to analyze CT scan images in order to determine the effect of tube current, slice thickness, and tube voltage on noise using the Noise Power Spectrum (NPS) method. Moreover, this study was also aimed to identify the optimal range of tube current, slice thickness, and tube voltage values to minimize noise formation in CT scan images while maintaining the safe dose for the patients. The research parameters included variations in tube current values with slice thickness variations, using tube voltages of 80 kV and 120 kV. The tube current (mAs) variations used were 150 mAs, 200 mAs, 250 mAs, 300 mAs, and 350 mAs, while the slice thickness variations were 0.8 mm, 1.6 mm, 3.2 mm, 4.8 mm, and 9.6 mm. A Phillips 16-slice access CT scan with a water phantom was utilized as the material for the research. The obtained image data were analyzed using ImQuest and ImageJ software. The results show that as the variations in tube current (mAs), slice thickness (mm), and tube voltage (mV) increase, the noise values decrease. This was demonstrated by the smallest area under the curve (AUC) values, which were 24.46 variance for the tube current variation at 120 kV and 3.57 variance for the slice thickness variation at 120 kV. Thus, to minimize the noise, it is recommended to increase the tube current, slice thickness, and tube voltage.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514069","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}

引用次数: 0

Determination of Fractionation Scheme Based on Repair Effect Using Equivalent Uniform Dose (EUD) Model 利用等效均匀剂量 (EUD) 模型确定基于修复效应的分馏方案

Indonesian Journal of Physics Pub Date : 2024-01-04 DOI: 10.5614/itb.ijp.2023.34.2.2

Tiara Andrina Pratista, R. Widita

{"title":"Determination of Fractionation Scheme Based on Repair Effect Using Equivalent Uniform Dose (EUD) Model","authors":"Tiara Andrina Pratista, R. Widita","doi":"10.5614/itb.ijp.2023.34.2.2","DOIUrl":"https://doi.org/10.5614/itb.ijp.2023.34.2.2","url":null,"abstract":"Radiotherapy treatment planning is required to obtain an optimal balance between delivering a high dose to target volume and a low dose to organ at risks. In this planning, it is also necessary to determine the appropriate fractionation scheme for each patient. One of the commonly used methods to determine the fractionation scheme is calculating the Normal Tissue Complication Probability (NTCP) and Tumor Control Probability (TCP) parameters. In this study, the Equivalent Uniform Dose (EUD) model is used to calculate NTCP and TCP. This model is based on a non-uniform dose distribution that is sensitive to the biological factors of cells. The biological factor examined in this research is the repair effect, which is the ability of cells to repair themselves after being radiated. Thus, the objective of this research is to determine the fractionation scheme based on NTCP calculations using the EUD model while taking into account the repair effect. The data used in this study were obtained from 10 patients with glioblastoma brain cancer in the form of cumulative DVH (dose-volume histogram) and total time of radiation. Based on the NTCP calculations, the average risk of organ complication for each patient appears to be close to zero, with a range of values from 2 x 10-6% to 1 x 10-1%. These results indicate that the treatment planning conducted is proven to be safe and there are no complications for the patients. Furthermore, based on the NTCP and TCP calculations, the best fractionation scheme is hypofractionation, which remains safe while considering the dose limit for each normal organ surrounding the target.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514081","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}

引用次数: 0

Investigation of hydraulic jump by using the Moving Particle Semi-Implicit method 使用移动粒子半隐式法研究水力跃迁

Indonesian Journal of Physics Pub Date : 2023-11-13 DOI: 10.5614/itb.ijp.2023.34.1.5

Yacobus Yulianto

{"title":"Investigation of hydraulic jump by using the Moving Particle Semi-Implicit method","authors":"Yacobus Yulianto","doi":"10.5614/itb.ijp.2023.34.1.5","DOIUrl":"https://doi.org/10.5614/itb.ijp.2023.34.1.5","url":null,"abstract":"Investigation of hydraulic jump is necessary to provide the required data in hydraulic structures. Simulations are an alternative to experiments for providing data. The objective of this modeling is to examine the impact of the reservoir level on the height after the jump and the distance of the jump from the front of the exhaust hole. The simulation was performed by using the Moving Particle Semi-Implicit method. The reservoir level was set to 10 m, 18 m, and 32 m with 18174, 23934, and 33942 particles of simulation, respectively. The obtained results indicate that the height of the reservoir after the jump is between 2.68 m and 3.60 m for an initial reservoir level of 10 m. For an initial reservoir level of 18 m, the height of the jump is between 2.90 and 5.18 m. The final height after the jump ranges from 2.98 m to 8.28 meters for an initial reservoir level of 32 m. Consistent with the findings of other researchers, the simulation outcomes are extremely favorable. The higher the reservoir level, the higher the height after the jump, according to the obtained results of this study. In addition, the distance of the jump from the front of the exhaust hole increases as the reservoir fills. Regarding the expansion of this study, additional research must be conducted to investigate this phenomenon in greater depth, particularly with regard to particle velocity during the hydraulic jump process.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139279126","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}

引用次数: 0

Electronic and Surface Properties of Aluminum (111) Surface Modified by Interstitial and Substitutional Titanium Incorporation 通过置换和取代掺杂钛改性的铝（111）表面的电子和表面特性

Indonesian Journal of Physics Pub Date : 2023-09-18 DOI: 10.5614/itb.ijp.2023.34.1.3

I. Aditya

引用次数: 0

Montecarlo Application on Nucleon Dynamics in Calculating Fission Yield at 14 MeV Neutron Energy 蒙特卡洛核子动力学在计算 14 MeV 中子能裂变产率中的应用

Indonesian Journal of Physics Pub Date : 2023-09-18 DOI: 10.5614/itb.ijp.2023.34.1.4

Rizal Kurniadi

{"title":"Montecarlo Application on Nucleon Dynamics in Calculating Fission Yield at 14 MeV Neutron Energy","authors":"Rizal Kurniadi","doi":"10.5614/itb.ijp.2023.34.1.4","DOIUrl":"https://doi.org/10.5614/itb.ijp.2023.34.1.4","url":null,"abstract":"Nuclear data is a completeness that must be present in every activity related to nuclear technology. So high is the role of nuclear data, it is necessary to have very complete nuclear data. The need for nuclear data is not in line with the resulting experimental products. The amount of experimental data needs to be completed. This is because the operational costs for these experiments are costly. Thus, theoretical modeling calculations are inevitably the right choice to replace experimental results. Many theoretical models have been developed to obtain satisfactory results. They were starting from microscopic models to macroscopic models. A common obstacle is that microscopic models must be simplified and efficient to produce massive nuclear data. Meanwhile, the constraints on the macroscopic model could be more accurate. This paper will present a calculation that tries to produce accurate but uncomplicated and economical data. This technique uses the basic principles of random numbers and classical nucleon dynamics in the nucleus. At the end of the paper, the results of calculations are presented, which are very accurate and, at the same time, show the dynamics of the nucleons that occur.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139339190","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}

引用次数: 0

Generation of spin polarization in a multibarrier structure 多势垒结构中自旋极化的产生

Indonesian Journal of Physics Pub Date : 2023-08-02 DOI: 10.5614/itb.ijp.2023.34.1.2

B. D. Napitu

引用次数: 0

Total Kinetic Energy of Fission Fragments based on Fission Product Data 基于裂变产物数据的裂变碎片总动能

Indonesian Journal of Physics Pub Date : 2023-08-02 DOI: 10.5614/itb.ijp.2023.34.1.1

Rizal Kurniadi

引用次数: 0

Skyrme-Hartree-Fock on Deformed Nucleus for the Island of Inversion Case 逆转岛病例中变形核的Skyrme-Hartree-Fock

Indonesian Journal of Physics Pub Date : 2022-12-22 DOI: 10.5614/itb.ijp.2022.33.2.3

R. Kurniadi

引用次数: 0