Analysis of hetero-coagulation structure of colloidal mullite precursor powder - experimental approach and computer simulation -

1997 ◽  
Vol 501 ◽  
Author(s):  
Y. I. Cho ◽  
H. Kamiya ◽  
H. Takano ◽  
M. Horio ◽  
H. Suzuki
Keyword(s):  
Computer Simulation ◽  
Electrophoretic Mobility ◽  
Experimental Approach ◽  
Single Mode ◽  
Brownian Dynamic ◽  
Mixing Processes ◽  
Coagulation Structure ◽  
Dynamic Methods ◽  
Ph Conditions ◽  
Precursor Powders

ABSTRACTTo control the hetero-coagulation structure of ultra-fine γ-A12O3 and SiO2 powders for mullite ceramics, hetero-coagulation structures in suspensions with different pH conditions were investigated by experimental approach and computer simulation. Electrophoretic mobility distribution, which was determined by a Laser Doppler method, was used for the estimation of hetero-coagulation structure. As results, a bimodal electrophoretic mobility distribution was observed when precursor powders were prepared by colloidal mixing processes at pH=9.5. Since each peak almost corresponded to the electrophoretic mobility of γ-A12O3 or SiO2 particles, hetero-coagulates were not formed in suspension. In the case of pH=6.0, heterocoagulates generated in suspension, however, uniform and fine hetero-coagulates could not be attained. On the other hand, narrow and single mode electrophoretic mobility distribution was observed after colloidal mixing at pH=4.4. The change of hetero-coagulation structure with different pH conditions were analyzed by using Brownian dynamic methods with considering hetero-coagulated system. The change of hetero-coagulation structure with different pH conditions were qualitatively simulated by this model.

STUDY ON THE TRAFFIC OF NANONETWORK APPLICATIONS

2020 ◽  
Author(s):  
Р.Я. ПИРМАГОМЕДОВ ◽  
И.В. ХУДОЕВ ◽  
А.Е. КУЧЕРЯВЫЙ
Keyword(s):  
Computer Simulation ◽  
Traffic Modeling ◽  
Telecommunication Systems ◽  
Dynamic Methods ◽  
Series Of Experiments

Рассматриваются вопросы моделирования трафика наносетевых приложений - одного из перспективных направлений развития телекоммуникационных систем (IMT-2030). Трафик анализируется с учетом существующих алгоритмов работы шлюза, обеспечивающего взаимосвязь между наносетью и традиционными сетями. Проведен цикл экспериментов с использованием методов имитационного компьютерного моделирования. Сделаны выводы о необходимости динамических подходов к управлению сетевыми ресурсами в событийно-ориентированных наносетях. It is considered the issue of traffic modeling of nanonetwork applications - one of the promising directions of the development of telecommunication systems (IMT-2030). The traffic is analyzed taking into account the existing algorithms of the gateway, which provides the interaction between the nanonetwork and traditional networks. A series of experiments were carried out using the methods of computer simulation. The article concludes that the management of the resources of event-oriented nanonetworks requires dynamic methods.

Computer simulation of the propagation of extremely short femtosecond pulse in single-mode fiber with shifted dispersion characteristics

2011 ◽  
Vol 20 (4) ◽  
pp. 237-246 ◽  
Author(s):  
D. L. Hovhannisyan ◽  
V. O. Chaltykyan ◽  
A. O. Hovhannisyan ◽  
G. D. Hovhannisyan ◽  
K. A. Hovhannisyan
Keyword(s):  
Computer Simulation ◽  
Femtosecond Pulse ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Dispersion Characteristics

Effect of Mechanical Alloying on Characteristic of Powders of Amnoia Hepatamolybdate, Copper and MoCu Sintered

2014 ◽  
Vol 802 ◽  
pp. 25-28
Author(s):  
Ronyclei Raimundo Silva ◽  
Leonardo Resende ◽  
Rodolfo Albuquerque Buarque Assunção ◽  
Franciné Alves Costa ◽  
Uílame Umbelino Gomes
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Alloying ◽  
Hydrogen Gas ◽  
Composite Powders ◽  
Mixing Processes ◽  
Ammonium Heptamolybdate ◽  
Density Measurements ◽  
Environmentally Sustainable ◽  
Two Samples ◽  
Precursor Powders

The mechanical alloying of Mo-Cu powders allows the production of highly homogeneous sintered pieces, with very thin Mo particles and good dispersion of Mo particles in the ductile Cu phase, allowing the development of a route for the preparation of Mo-Cu simple composite powders, environmentally sustainable and able to increase the sinterability of the material without causing damage to their properties of thermal conductivity and electrical. Was used the precursor powders of molybdenum (Ammonium heptamolybdate) plus Cu, where two samples were prepared by mixing processes. For mechanical alloying, and by mixing manually, and both reduced and sintered in a resistive furnace with hydrogen gas. The materials were analyzed by optical microscopy, XRD and density measurements. The results confirm the effect of mechanical alloying on the increasing in high density of the sintered samples and thereby producing superior properties to those shown by the mixing manually sample.

scholarly journals A comparison of degradation rate bone scaffold morphology between computer simulation and experimental approach

2017 ◽  
Vol 13 (4-2) ◽  
pp. 529-532
Author(s):  
Akbar Teguh Prakoso ◽  
Ardiyansyah Syahrom ◽  
Mohd Ayub Sulong ◽  
Amir Putra Md. Saad ◽  
Irsyadi Yani ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Cross Sections ◽  
Degradation Rate ◽  
Experimental Approach ◽  
Bone Scaffold ◽  
Micro Computed Tomography ◽  
Dynamic Flow ◽  
Porous Magnesium ◽  
Orthopedic Applications ◽  
Good Agreement

The objective of this research is to validate the behavior of degradation rate within porous magnesium scaffolds in terms of morphological which includes weight loss after degradation by means of micro-computed tomography (µCT) based on image processing. The main contribution of this work is finding another method to determine morphology based on computer simulation. In the present study, bone scaffold specimens made of pure magnesium that was prepared with three different percentages of porosities 30%, 41%, and 55%. There were immersed and subjected to the dynamic flow rate of simulated body fluid for periods of 24, 48 and 72 hours. One sample of each specimen was scanned by µCT with a resolution of 17 µm. The cross-sections of raw data were superimposed by using MIMICS software to form a 3D reconstruction of the samples after degradation. The degradation morphology was collected from the simulation and showed good agreement with the experimental results by only less than 2%. Based on the simulation results, it is possible to give a recommendation for the alternative way in the morphological study of orthopedic applications.

Computer Programs for Fire Simulation

1996 ◽  
Author(s):  
David G. Lilley
Keyword(s):  
Computer Simulation ◽  
Experimental Approach ◽  
Computer Programs ◽  
Fire Simulation ◽  
Fire Scenario ◽  
Site Investigations ◽  
Fire Scenarios ◽  
Computer Calculations ◽  
Witness Statements ◽  
Rule Out

Abstract Computer programs for simulating fire development in a multi-room building complements the experimental approach and/or post-fire on-site investigations. A variety of computer calculations can help to validate or deny a suggested fire scenario and witness statements. Thus they help to discriminate between alternative fire scenarios by evaluating the consequences and comparing them with observations. In this way computer simulation helps to rule in or rule out the suggested ignition and spread of the fire.

scholarly journals Sensing force and charge at the nanoscale with a single-molecule tether

Nanoscale ◽  
2021 ◽  
Author(s):  
Xuanhui Meng ◽  
Philipp Kukura ◽  
Sanli Faez
Keyword(s):  
Electrophoretic Mobility ◽  
Single Molecule ◽  
Single Particle ◽  
Experimental Approach ◽  
Particle Measurements ◽  
Mobility Of Molecules

Measuring the electrophoretic mobility of molecules is a powerful experimental approach for investigating biomolecular processes. A frequent challenge in the context of single-particle measurements is throughput, limiting the obtainable statistics....

Single - mode DFB laser computer simulation

2005 ◽  
Author(s):  
H.V. Bagdassaryan ◽  
A.V. Daryan ◽  
T.M. Knyazyan ◽  
N.K. Uzunoglu
Keyword(s):  
Computer Simulation ◽  
Single Mode ◽  
Dfb Laser
Sign in / Sign up

Export Citation Format

Share Document