cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Asril Pramutadi Andi Mustari
Contact Email
IJPhysicsITB@gmail.com
Phone
+6222-2500834
Journal Mail Official
ijp-journal@itb.ac.id
Editorial Address
Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA
Location
Kota bandung,
Jawa barat
INDONESIA
Indonesian Journal of Physics (IJP)
Published by Institut Teknologi Bandung
ISSN : 23018151     EISSN : 29870828     DOI : https://doi.org/10.5614/itb.ijp
Core Subject : Science, Engineering,
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering
Indonesian Journal of Physics welcomes full research articles in the area of Sciences and Engineering from the following subject areas: Physics, Mathematics, Astronomy, Mechanical Engineering, Civil and Structural Engineering, Chemical Engineering, Electrical Engineering, Geotechnical Engineering, Engineering Science, Environmental Science, Materials Science, and Earth-Surface Processes. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 334 Documents
 13   14   15   16   17 
Simulation of Surface Potential Distribution Induced by Electronic Carrier Injection into Single Silicon Quantum Dot Yudi Darma; Rizal Kurniadi; M. Hamzah Fauzi; Yuli Cha Tarido
Indonesian Journal of Physics Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.62 KB)

Abstract

In this paper we propose a numerical simulation method of the surface potential distribution based on the solution of two-dimensional Poisson equation in rectangular coordinates with boundary condition. The simulation results confirm that the surface potential changes on the dot by electron injection and/or extraction, in contrast to the neutral dot in which just a flat potential image was observed. . In this work we investigated the charge states of individual quantum dot with the diameter of 10 and 20nm. Note that, if two or more electrons are injected/extracted to/from the quantum dot, the coulombic repulsion effect is observed, and more clearly for the dot with the bigger size due to the charges separation into the quantum dot.
Sensor Modeling of a Vibration Sensor Mitra Djamal
Indonesian Journal of Physics Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.242 KB)

Abstract

A new type of vibration sensor based on flat coil element has been made. A sensor modeling based on a polynomial model for determining frequency and amplitude of the sensor has been developed. The model shows a good result with relative error under 6%.
Projection Correlation Optimization using Simulated Annealing in CT Image Reconstruction Rena Widita
Indonesian Journal of Physics Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.574 KB)

Abstract

Image reconstruction without analytical continuation is possible if and only if all projections cover entire object. In medical CT (Computed Tomography) applications, this condition is clearly not achievable. The new algorithm for image reconstruction using a few beam positions (projection correlation method) has been proved offer several advantages. . One drawback of using a few beam positions is a low quality image yielded. Thus, an objective function to rank the image quality is required to automate the decision process in determining the optimum beam positions. In this work, two optimization methods, gradient-descent method and simulated annealing, using projection correlation value as the objective function, were developed and compared to obtain the optimum beam positions. The effectiveness and practicality of each of these methods were compared. The results show that the simulated annealing presents superior results. This method could potentially be used in a clinical environment.
Design of The 200 MW(t) Pb-Bi Cooled Nuclear Fast Reactor For Steam Membrane Reforming Hydrogen Production Epung Saepul Bahrum; Zaki Su’ud; Abdul Waris; Bambang Ari Wahjoedi
Indonesian Journal of Physics Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (307.98 KB)

Abstract

Design study of the 200 MW(t) Pb-Bi cooled nuclear fast reactor for steam membrane reforming hydrogen production has been proposed. The design base on neutronic, steady state thermalhydraulic and safety examination of the 200 MWt Pb-Bi cooled fast nuclear reactor. For balance cylindrical core demonstrated that at flowrate 7000 kg s-1 and inlet coolant temperature of 350 0C yield average and maximum coolant outlet temperature of 552 and 621 0C. The safety analysis confirm at that situation the coolant and fuel cladding maximum temperature lower than coolant boiling and cladding melting temperature. The 552 0C average coolant outlet temperature corresponds to maximum reaction temperature of the steam membrane reforming which is close to 550 0C. We proposed design of the 200 MW(t) Pb-Bi cooled balance cylindrical core nuclear fast reactor for steam membrane reforming hydrogen production. The configuration of the design is Pb-Bi cooled nuclear fast reactor and steam membrane hydrogen production unit coupled with intermediate heat exchanger. One of the intermediate heat exchanger functions is to protect nuclear reactor when an explosion accident occur in the hydrogen production unit.
Comparison of Electron Direct Tunneling Time in a Heterostructure with a Nanometer-Thick Trapezoidal Barrier Calculated Using Exponential and Airy Wavefunctions Fatimah A. Noor; Mikrajuddin Abdullah; Sukirno Sukirno; Khairurrijal Khairurrijal
Indonesian Journal of Physics Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.833 KB)

Abstract

Analytical expressions of electron direct transmittance and tunneling time in a heterostructure with a nanometer-thick trapezoidal barrier have been derived by using the Airy wavefunctions. The analytic expressions are applied to the Si (100)/SiO2/Si (100) heterostructure. It has been found that the electron direct transmittance and tunneling time are suitably calculated by employing the Airy wavefunction as compared to those obtained under the exponential wavefunction. It has also been found that the calculated electron direct transmittance and tunneling time under the Airy wavefunction are the same as those under the exponential wavefunction for very low bias voltage and low electron incident energy.
Preliminary Study of Steels Corrosion Phenomena in Liquid Lead-Bismuth using Molecular Dynamics Methods Alan Maulana; Zaki Su'ud; Hermawan K. Dipojono; Khairurrijal Khairurrijal
Indonesian Journal of Physics Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (110.045 KB)

Abstract

One of the prospective coolant material which can be used in the forth generation nuclear reactor is a liquid lead-bismuth. This coolant has inherent safety capability, economical, and able to burn their own nuclear waste. The problem of using this coolant is corrosion phenomena of steel occurred in the interaction with liquid lead-bismuth especially at high temperatures. Corrosion in this study is assumed as diffusion phenomena of leads or bismuths into the surface of steel. This phenomenon have been studied by molecular dynamic methods. As the first step to this investigation, the molecular dynamic program called Moldy has been used to simulate pure iron and lead system. The molecular dynamic simulation result of pure Fe system at 0 K showed that the peaks positions of radial distribution function is in a good agreement with the result from experiment. The deviation of the peaks position resulted from simulation and experiment is about 0.5%. The simulation result of Pb system showed no significant different with the result from experiment. The simulation also shows the broadening of the curves of radial distribution function and lowering the intensity at high temperature. These results indicate that the atomic positions of the system are distributed randomly.
Design Study of Long Life Pb-Bi Cooled Reactors With Natural Uranium as Fuel Cycle Input Using Radial Fuel Shuffling Strategy Rida Siti NM; Zaki Su'ud
Indonesian Journal of Physics Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (75.404 KB)

Abstract

Conceptual design study of Pb-Bi cooled fast reactors which fuel cycle need only natural uranium input has been performed. In this design the reactor cores are subdivided into several parts with the same volume. The region with natural uranium is put in the central core while the outer region is arranged with increasing plutonium content. However, in some cases the region with natural uranium content can be put in the most outer part of the core. The arrangement of the plutonium content considers the criteria that the fuel in the certain part must be fit for fresh fuel in the next higher enrichment region. Therefore at the end of a long life operation we just need to supply natural uranium fuel to the blanket region and move other regions properly to the next regions. As an example, using SRAC and FI-ITB CHI code system we obtained a core with 15-20 years life time per sub cycle.
Simulation of Mobile Robot Navigation System using Combination Method of A* Algorithm with Virtual Force Field Harri Sapto Wijaya; Mitra Djamal
Indonesian Journal of Physics Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.986 KB)

Abstract

A novel mobile robot navigation system has been developed and simulated. This method took advantages of two known methods: A* algorithm for minimum path finding and Virtual Force Field (VFF) for obstacle avoidance. This method allow the dynamic of environment also semi fully informed map. A* and VFF had been combined by splitting the path which obtained by A* into several straight lines and a temporary target is putted on every turning point of straight lines for VFF method. Each time the temporary target is reached by robot, it will be deactivated and next temporary target will be activated, until the final target is reached. Simulation is run on MobotSim 1.0 software and the result shows that the robot could pass the U-like shape obstacle (which usually problem by just using VFF method), uninformed static obstacle, and uninformed moving obstacle.
Seismic Activity of Volcano-tectonic Earthquakes at Guntur Volcano, West Java, Indonesia During the Period from 1991 to 2005 Nurlia Sadikin; Masato Iguchi; Gede Suantika; Muhamad Hendrasto
Indonesian Journal of Physics Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (726.541 KB)

Abstract

Volcano-tectonic earthquakes at Guntur volcano were analyzed. The hypocenters are distributed in 3 regions; around the summit area from Masigit volcano to Guntur volcano at depths <2km, Gandapura caldera at depths <3km and around Kamojang geothermal field at depths of 2-8km. The focal mechanisms are characterized by normal and reverse faults in the summit area and normal fault in Gandapura. The mechanism is dominated by strike-slip fault type in Kamojang. Although eruptivity of Guntur volcano has been dormant since 1847, VT earthquakes beneath the summit area and Gandapura may be related with intermittent intrusion of magma, considering focal mechanism of VT earthquakes and uplift of the ground around the summit area and Gandapura. However, the seismic energy release stayed at lower level than threshold preceding magmatic eruption.
Comparison of Electron Direct Transmittance and Tunneling Time of Si (100)/HfO2/Si (100) and Si (110)/HfO2/Si (110) Structures with Ultra-thin Trapezoidal Barrier Fatimah A. Noor; Mikrajuddin Abdullah; Sukirno Sukirno; Khairurrijal Khairurrijal
Indonesian Journal of Physics Vol 18 No 2 (2007): Vol. 18 No. 2 April 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.48 KB) | DOI: 10.5614/itb.ijp.2007.18.2.1

Abstract

An analytical expression of electron direct transmittance and tunneling time through a nanometer-thick trapezoidal potential barrier have been derived by using a phase-time method with Airy wavefunction solution. The expression is applied to Si(100)/HfO2/Si(100) (isotropic) and Si(110)/HfO2/Si(110) (anisotropic) structures calculated under the consideration of barrier width, incident energy, incident angle, and bias voltage. The calculated results are discussed and comparisons between the isotropic and anisotropic heterostructures are discussed.

Page 15 of 34 | Total Record : 334

 13   14   15   16   17 

Filter by Year

2001 2025


Reset
Filter By Issues
All Issue Vol 36 No 1 (2025): Vol 36 No 1 2025 Vol 35 No 2 (2024): Vol 35 No 2 2024 Vol 35 No 1 (2024): vol 35 no 1 2024 Vol 34 No 2 (2023): vol 34 no 2 2023 Vol 34 No 1 (2023): vol 34 no 1 2023 Vol 33 No 2 (2022): Vol 33 No 2 (2022) Vol 33 No 1 (2022): Vol 33 No 1 (2022) Vol 32 No 2 (2021): Vol 32 No 2 (2021) Vol 32 No 1 (2021): Vol 32 No 1 (2021) Vol 31 No 2 (2020): Vol 31 No 2 (2020) Vol 31 No 1 (2020): Vol 31 No 1 (2020) Vol 30 No 2 (2019): Vol 30 No 2 (2019) Vol 30 No 1 (2019): Vol 30 No 1 (2019) Vol 27 No 1 (2016): Vol 27 No 1 (2016), July 2016 Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015 Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015 Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012 Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011 Vol 22 No 3 (2011): Vol. 22 No. 3, July 2011 Vol 22 No 2 (2011): Vol. 22 No. 2, April 2011 Vol 22 No 1 (2011): Vol. 22 No. 1, January 2011 Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010 Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010 Vol 21 No 2 (2010): Vol. 21 No. 2, April 2010 Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010 Vol 20 No 4 (2009): Vol. 20 No. 4, October 2009 Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009 Vol 20 No 2 (2009): Vol. 20 No. 2, April 2009 Vol 20 No 1 (2009): Vol. 20 No. 1, January 2009 Vol 19 No 4 (2008): Vol. 19 No. 4, October 2008 Vol 19 No 3 (2008): Vol. 19 No. 3, July 2008 Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008 Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008 Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007 Vol 18 No 3 (2007): Vol. 18 No. 3 July 2007 Vol 18 No 2 (2007): Vol. 18 No. 2 April 2007 Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007 Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006 Vol 17 No 3 (2006): Vol. 17 No. 3, July 2006 Vol 17 No 2 (2006): Vol. 17 No. 2, April 2006 Vol 17 No 1 (2006): Vol. 17 No. 1, January 2006 Vol 16 No 4 (2005): Vol. 16 No. 4, October 2005 Vol 16 No 3 (2005): Vol. 16 No. 3, July 2005 Vol 16 No 2 (2005): Vol. 16 No. 2, April 2005 Vol 16 No 1 (2005): Vol. 16 No.1, January 2005 Vol 15 No 4 (2004): Vol. 15 No. 4, October 2004 Vol 15 No 3 (2004): Vol. 15 No. 3, July 2004 Vol 15 No 2 (2004): Vol. 15 No.2, April 2004 Vol 15 No 1 (2004): Vol. 15 No.1, January 2004 Vol 14 No 4 (2003): IJP Vol. 14 No. 4, October 2003 Vol 14 No 3 (2003): Vol. 14 No.2, Juli 2003 Vol 14 No 2 (2003): Vol. 14 No.2, April 2003 Vol 14 No 1 (2003): Vol. 14 No.1, Januari 2003 Vol 13 No 4 (2002): Vol. 13 No.4, October 2002 Vol 13 No 3 (2002): Vol. 13 No.3, Juli 2002 Vol 13 No 2 (2002): Vol. 13 No.2, April 2002 Vol 13 No 1 (2002): Vol. 13 No.1, Januari 2002 Vol 12 No 4 (2001): Vol. 12 No.4, Oktober 2001 Vol 12 No 3 (2001): Vol. 12 No.3, Juli 2001 Vol 12 No 2 (2001): Vol. 12 No. 2, April 2001 Vol 12 No 1 (2001): Vol. 12 No. 1, Januari 2001 More Issue