Simulation Techniques in Nonstandard Models

Intramembrane particles (IMP or MAP) are components of most biomembranes. They are visualized by freeze-fracture electron microscopy, and they probably represent replicas of integral membrane proteins. The presence of MAP in biomembranes has been extensively investigated but their detailed ultrastructure has been largely ignored. In this study, we have attempted to lay groundwork for a systematic evaluation of MAP ultrastructure. Using mathematical modeling methods, we have simulated the electron optical appearances of idealized globular proteins as they might be expected to appear in replicas under defined conditions. By comparing these images with the apearances of MAPs in replicas, we have attempted to evaluate dimensional and shape distortions that may be introduced by the freeze-fracture technique and further to deduce the actual shapes of integral membrane proteins from their freezefracture images.

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Σ =13 tilt grain boundary in silicon bicrystal

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175946 ◽

1990 ◽

Vol 48 (4) ◽

pp. 562-563

Author(s):

M.J. Kim ◽

Y.L. Chen ◽

R.W. Carpenter ◽

J.C. Barry ◽

G.H. Schwuttke

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Rotation Axis ◽

Czochralski Method ◽

High Resolution Electron Microscopy ◽

Image Simulation ◽

Simulation Techniques ◽

Resolution Electron ◽

The Common ◽

Tilt Grain Boundary

The structure of grain boundaries (GBs) in metals, semiconductors and ceramics is of considerable interest because of their influence on physical properties. Progress in understanding the structure of grain boundaries at the atomic level has been made by high resolution electron microscopy (HREM) . In the present study, a Σ=13, (510) <001>-tilt grain boundary in silicon was characterized by HREM in conjunction with digital image processing and computer image simulation techniques.The bicrystals were grown from the melt by the Czochralski method, using preoriented seeds. Specimens for TEM observations were cut from the bicrystals perpendicular to the common rotation axis of pure tilt grain boundary, and were mechanically dimpled and then ion-milled to electron transparency. The degree of misorientation between the common <001> axis of the bicrystal was measured by CBED in a Philips EM 400ST/FEG: it was found to be less than 1 mrad. HREM was performed at 200 kV in an ISI-002B and at 400 kv in a JEM-4000EX.

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Review of Computer Simulation Techniques.

Contemporary Psychology ◽

10.1037/009125 ◽

1967 ◽

Vol 12 (3) ◽

pp. 175-175

Author(s):

JOHN C. LOEHLIN

Keyword(s):

Computer Simulation ◽

Simulation Techniques ◽

Computer Simulation Techniques

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A study of visual simulation techniques for astronautical flight training.

PsycEXTRA Dataset ◽

10.1037/e404752004-001 ◽

1961 ◽

Cited By ~ 2

Author(s):

T. F. Buddenhagen ◽

M. P. Wolpin

Keyword(s):

Flight Training ◽

Visual Simulation ◽

Simulation Techniques

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Symposium 1: Benefits of simulation for decision-making in sport: Using simulation techniques to study the influence of action and handedness on decision-making in expert soccer players

PsycEXTRA Dataset ◽

10.1037/e547922012-448 ◽

2003 ◽

Author(s):

Bachir Zoudji ◽

Bettina Debu ◽

Bernard Thon

Keyword(s):

Decision Making ◽

Soccer Players ◽

Simulation Techniques

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Preface to Special Issue on Trend of Analysis and Simulation Techniques for Electric Power Dispatching and Regulation

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.136.454 ◽

2016 ◽

Vol 136 (5) ◽

pp. 454-454

Author(s):

Hiroumi Saitoh

Keyword(s):

Electric Power ◽

Special Issue ◽

Simulation Techniques ◽

Power Dispatching

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Comparison of Lead, Copper and Aluminium as Gamma Radiation Shielding Material through Experimental Measurements and Simulation Using MCNP Version 4c

International Journal of Contemporary Research and Review ◽

10.15520/ijcrr/2018/9/08/584 ◽

2018 ◽

Vol 9 (08) ◽

pp. 20193-20206 ◽

Cited By ~ 1

Author(s):

Md. Akhlak Bin Aziz ◽

Md. Faisal Rahman ◽

Md. Mahidul Haque Prodhan

Keyword(s):

Gamma Radiation ◽

Sodium Iodide ◽

Experimental Approach ◽

Radiation Shielding ◽

Test Material ◽

Simulation Techniques ◽

Radiation Sources ◽

Simulation Monte Carlo ◽

Shielding Material ◽

Code Version

The paper compares Lead, Copper and Aluminium as gamma radiation shielding material using both experimental and simulation techniques. Cs- 137 (662KeV), Na-22 (511KeV) and Na- 22(1274KeV) were used as gamma radiation sources and a sodium iodide (NaI) detector was used to detect the radiation. Variations were noted for detected gamma count rates by changing shielding material thickness. In the experimental approach, thickness was varied by placing sheets of a particular test material one by one. For simulation, Monte Carlo n- Particle (MCNP) code version 4c was used and the geometry of the whole experimental setup was plotted in it. The results were then compared for each test material and it was found that lead is the best shielding material for gamma radiation followed by copper and aluminium.

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