Indonesian Journal of Physics最新文献_第5页

Moving Particle Semi-implicit Method in Simulating Water-Oil Penetration 模拟水-油渗透的运动粒子半隐式方法

Indonesian Journal of Physics Pub Date : 2019-08-23 DOI: 10.5614/itb.ijp.2019.30.2.5

Y. Yulianto, A. Mustari, M. Ilham, A. N. Hidayati, S. Hatmanti

引用次数: 2

Dynamic Response of Non-linear Beam Structures in Deterministic and Chaos Perspective 确定性和混沌视角下非线性梁结构的动力响应

Indonesian Journal of Physics Pub Date : 2019-08-07 DOI: 10.5614/itb.ijp.2019.30.2.3

Anwar Dolu, Amrinsyah Nasution

引用次数: 0

Digital Image Analysis Of Single Rectangular Slit Fraunhofer Diffraction Patterns 单矩形狭缝夫琅和费衍射图样的数字图像分析

Indonesian Journal of Physics Pub Date : 2019-08-07 DOI: 10.5614/itb.ijp.2019.30.2.2

Y. Yogaswara, F. Latief

{"title":"Digital Image Analysis Of Single Rectangular Slit Fraunhofer Diffraction Patterns","authors":"Y. Yogaswara, F. Latief","doi":"10.5614/itb.ijp.2019.30.2.2","DOIUrl":"https://doi.org/10.5614/itb.ijp.2019.30.2.2","url":null,"abstract":"Study of the single rectangular slit Fraunhofer diffraction pattern has been carried out through experiments. Data acquisition was done by manually measuring the distance of the bright and dark diffraction patterns using millimeter block paper and by means of digital images analysis of the diffraction patterns. The digital images were used to obtain the bright and dark intensity data of the pattern as the function of the distance from the center of the pattern. The process of obtaining the data was carried out as follows: image acquisition, image digitization, image quality enhancement, graphics plotting and chart normalization. The data processing is done analytically and computationally using ImageJ software. The results of the digital image analysis of diffraction patterns produce an intensity graph of the distance of the diffraction pattern (I-y chart). The results from the digital image analysis approach provide an alternative method that is more accurate in the process of calculating the physical magnitude of diffraction parameters such as the wavelength of the source. One of the advantages of this method is that intensity of the diffraction pattern can be visualized as a function of the distance from the center of the screen. Although accuracy of the calculation result is not very high, the magnitude of the intensity can be observed to decrease with increasing distance of the diffraction pattern to the center of the screen. The results of the calculation of the source wavelength by means of digital image analysis provides good results compared to the manual method using the millimeter block paper. The smallest mean error of the wavelength by means of digital image analysis is 1,72% and the manual method using the millimeter block paper is 3,84%. This method of measurement using digital image analysis can be used as an alternative for various position or distance-based measurement, such as the calculation of linear expansion coefficient with a single slit diffraction method.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77915518","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

Characterization of Neutron and Gamma Beams at the TRIGA 2000 Reactor Beam Ports Using Monte Carlo TRIGA 2000反应堆光束口中子和伽马光束的蒙特卡罗表征

Indonesian Journal of Physics Pub Date : 2019-08-07 DOI: 10.5614/itb.ijp.2019.30.2.4

Rasito Rasito, S. Permana, Ilham Y

引用次数: 1

Volcanic Sediment Layer of Mount Samalas 1257 AD Modeling Based on Seismic Data 基于地震资料的萨马拉斯山1257 AD火山沉积层模拟

Indonesian Journal of Physics Pub Date : 2019-08-06 DOI: 10.5614/itb.ijp.2019.30.2.1

S. Minardi, T. Ardianto, A. T. Alaydrus, Hiden Hiden

引用次数: 0

2D Seismic Imaging Improvement through Prestack Depth Migration (PSDM) Method 基于叠前深度偏移(PSDM)方法的二维地震成像改进

Indonesian Journal of Physics Pub Date : 2019-03-13 DOI: 10.5614/itb.ijp.2019.30.1.5

Iyod Suherman, T. Wiguna, Rahadian Rahadian, D. Muljawan, O. Moefti

引用次数: 0

Yarkovsky Effect on the Orbital Dynamics of 1566 Icarus Asteroid 1566伊卡洛斯小行星轨道动力学的亚尔科夫斯基效应

Indonesian Journal of Physics Pub Date : 2019-01-16 DOI: 10.5614/itb.ijp.2019.30.1.2

Niken Rara Galih Amithya Parastuti, E. Soegiartini

{"title":"Yarkovsky Effect on the Orbital Dynamics of 1566 Icarus Asteroid","authors":"Niken Rara Galih Amithya Parastuti, E. Soegiartini","doi":"10.5614/itb.ijp.2019.30.1.2","DOIUrl":"https://doi.org/10.5614/itb.ijp.2019.30.1.2","url":null,"abstract":"The orbital dynamic of small objects is an n-body problem that can not be solve by analitically, it is needed to use numerical integration to find the solution instead. This work is about orbital dynamic of asteroid 1566 Icarus under Classical Newtonian gravitation and if thermal effect (Yarkovsky effect) is included. Yarkovsky Effect is a thermal radiation force resulted from time span of small rotating objects to receive heat from the Sun and then re-radiates it. The Yarkovsky Effect is working optimum for objects with diameter from 10 cm up to 10 km, and now is implemented to Asteroid 1566 Icarus with diameter 1.3 km which are member of Apollo and Earth crosser object. This Asteroid is called Earth crosser due to its orbit is crossing Earth’s orbit. With semi major axis a  1.078 au and eccentricity e  0.827, asteroid 1566 Icarus has perihelion distance q = 0.18674 au or less than semi major axis of Mercury. Due to that reason, Yarkovsky effect was considered to be applied on the orbital dynamics of asteroid 1566 Icarus. Due to sensitivity in input-data of numerical integration for n-body, one hundred simulation preliminary data were made as input in numerical integration process, therefore, 100 clones of Asteroid 1566 Icarus are gathered. Cloning process was conducted by using random number from Asteroid 1566 Icarus orbital elements at epoch 2456800.5 (23 May 2014) to standard deviation . The integration then later conducted within 105 years time span from the epoch. The result shown that the orbital dynamics of asteroid 1566 Icarus with Yarkovsky effect is still within the range of 100 clones of asteroid 1566 Icarus. Thereby, within 105 years, Yarkovsky effect does not change the orbital dynamic of asteroid 1566 Icarus globally, except for two phenomenon between close encounter with planet.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89557759","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

Effect of Temperature Semi-solid Casting Process on AZ91D Magnesium Alloys to Hardness and Microstructures 温度半固态铸造工艺对AZ91D镁合金硬度和组织的影响

Indonesian Journal of Physics Pub Date : 2019-01-14 DOI: 10.5614/itb.ijp.2019.30.1.4

Kusharjanto Kusharjanto, S. Sutarno, R. H. Mulyani

引用次数: 0

Analysis of Effect of Change Source to Surface Distance (SSD) and the Field Size to Distribution Dose Using Monte Carlo Method-EGSnrc 用蒙特卡罗方法分析变化源对表面距离和场大小对分布剂量的影响

Indonesian Journal of Physics Pub Date : 2019-01-13 DOI: 10.5614/itb.ijp.2019.30.1.3

Intan Dillia Nurhadi, Ridwan Ramdani, F. Haryanto, Y. S. Perkasa, M. Sanjaya

{"title":"Analysis of Effect of Change Source to Surface Distance (SSD) and the Field Size to Distribution Dose Using Monte Carlo Method-EGSnrc","authors":"Intan Dillia Nurhadi, Ridwan Ramdani, F. Haryanto, Y. S. Perkasa, M. Sanjaya","doi":"10.5614/itb.ijp.2019.30.1.3","DOIUrl":"https://doi.org/10.5614/itb.ijp.2019.30.1.3","url":null,"abstract":"Research was conducted to analyze the effect of changes in the distance radiation source to the surface it is called the medium Source to Surface Distance (SSD) and wide exposure field (Field Size) on the distribution of the dose in linear air Accelerator (LINAC) using Monte Carlo - EGSnrc. Monte Carlo simulation is used for modeling and simulation head linac at BEAMnrc. Virtual model of the linac is made based on the data characteristics of the aircraft Linac Varian Clinac iX then its output obtained information characteristic photon beam using BEAMDP, while modeling and simulation phantom done on DOSXYZnrc with the size of the phantom is (40x40x40) cm3 , with the material in the form of water, using a beam of photons 6 MV, testing variation SSD at 80 cm, 90 cm, 100.1 cm, 110 cm, 120 cm and variation field size is (6x6) cm2, (10x10) cm2, (20x20) cm2 to obtain disribution of dosage form of curves Percentage Depth dose (PDD) and Profile dose. The results showed that the smaller distance radiation source to the surface of the medium (SSD) and the greater the broad field (field size), then increasing the dose distribution is obtained. In the SSD and Field Size variation, the radiation dose will continue to rise significantly from the surface of the medium 0 cm to a depth of maximum dose (Dmax), then the dose began to decline after passing the depth Dmax.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78572081","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

An Application of Inversion Technique to 1-Dimensional Gravity Data in Bayesian Framework using Monte Carlo, Metropolis, and Simulated Annealing Algorithm 基于蒙特卡罗、Metropolis和模拟退火算法的贝叶斯框架下一维重力数据反演技术的应用

Indonesian Journal of Physics Pub Date : 2019-01-09 DOI: 10.5614/itb.ijp.2019.30.1.1

Adam Sukma Putra, W. Srigutomo, Y. Tiandho, Herlin Tarigan, Y. Yanti

引用次数: 0