Simulation analysis of an optical processor for determination of relative translation of two speckle patterns

2002 ◽  
Author(s):  
Petr Smid
Keyword(s):  
Simulation Analysis ◽  
Speckle Patterns ◽  
Optical Processor

scholarly journals A Simulation Analysis of an Extension of One-Dimensional Speckle Correlation Method for Detection of General In-Plane Translation

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Ivana Hamarová ◽  
Petr Šmíd ◽  
Pavel Horváth ◽  
Miroslav Hrabovský
Keyword(s):  
Simulation Analysis ◽  
Speckle Pattern ◽  
Correlation Method ◽  
Object Plane ◽  
Speckle Field ◽  
Geometrical Arrangement ◽  
One Dimensional ◽  
Speckle Correlation ◽  
Speckle Patterns

The purpose of the study is to show a proposal of an extension of a one-dimensional speckle correlation method, which is primarily intended for determination of one-dimensional object's translation, for detection of general in-plane object's translation. In that view, a numerical simulation of a displacement of the speckle field as a consequence of general in-plane object's translation is presented. The translation componentsaxandayrepresenting the projections of a vectoraof the object's displacement onto bothx- andy-axes in the object plane(x,y)are evaluated separately by means of the extended one-dimensional speckle correlation method. Moreover, one can perform a distinct optimization of the method by reduction of intensity values representing detected speckle patterns. The theoretical relations between the translation componentsaxandayof the object and the displacement of the speckle pattern for selected geometrical arrangement are mentioned and used for the testifying of the proposed method's rightness.

Simulation Analysis in the Determination of Prehospital Response Times in the City of Santo Domingo

2007 ◽  
Vol 14 (4) ◽  
pp. e77-e77
Author(s):  
A. A. Baez ◽  
J. Rodriguez ◽  
S. Rogers ◽  
C. Pozner ◽  
E. Giraldez
Keyword(s):  
Simulation Analysis ◽  
Response Times ◽  
Santo Domingo ◽  
The City

scholarly journals Location Determination Of Optimal Emergency System For Hurricane Disaster Based On Mathematical Modeling

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Shizhong Ma
Keyword(s):  
Control System ◽  
Optical Communication ◽  
Simulation Analysis ◽  
Control System Design ◽  
Optical Communication System ◽  
Location Determination ◽  
Space Optical Communication ◽  
Working Principle ◽  
The Mathematical Model

AbstractThis article first introduces the current research status of space optical communication, and gives a brief overview of the development and application prospects of space optical communication, explaining its important research significance. Then, the working principle of ATP in space optical communication system is studied, the mathematical model of ATP control system is established according to the actual needs, and the ATP control system design of space optical communication is designed. By selecting appropriate motors and gyroscopes as the actuators and detection elements of the system, substituting the actual parameters for simulation analysis, and correcting and verifying the results, some useful results are obtained. The simulation results show the rationality and effectiveness of the ATP design scheme.

scholarly journals Structural determination of Co/TiO2 nanocomposite: XRD technique and simulation analysis

2016 ◽  
Vol 34 (3) ◽  
pp. 534-539 ◽  
Author(s):  
F. Mostaghni ◽  
Y. Abed
Keyword(s):  
Band Gap ◽  
Simulation Analysis ◽  
Sol Gel ◽  
Experimental Studies ◽  
Pure Tio2 ◽  
X Ray Diffraction ◽  
Tio2 Anatase ◽  
Structural And Electronic Properties ◽  
Diffraction Patterns

AbstractSynthesis and complex theoretical and experimental studies of Co/TiO2 anatase have been reported. The preparation of Co/TiO2 was carried out by sol-gel method. Distribution of cations among the two tetrahedral and octahedral sites was estimated by analyzing the powder X-ray diffraction patterns by employing Rietveld refinement technique, and the results revealed the existence of tetragonal structure. Band structure and density of states calculations were performed using the first-principles methods. The structural and electronic properties of Co/TiO2 were calculated in the general gradient approximation (GGA). An additional comparison with pure TiO2 anatase allowed us to clarify cobalt doping effect on the electronic structure and the band gap. The band gap of Co/TiO2 was decreased by broadening the valence band as a result of the overlap among Co 3d, Ti 3d, and O 2p states, which made it respond better to visible and solar light.

Two simple methods for overall determination of mobility in dynamic speckle patterns

Optik ◽  
2013 ◽  
Vol 124 (24) ◽  
pp. 6565-6569 ◽  
Author(s):  
N. Budini ◽  
C. Mulone ◽  
F.M. Vincitorio ◽  
C. Freyre ◽  
A.J. López ◽  
...  
Keyword(s):  
Dynamic Speckle ◽  
Speckle Patterns

scholarly journals Determination of tyrosinase-cyanidin-3-O-glucoside and (−/+)-catechin binding modes reveal mechanistic differences in tyrosinase inhibition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kyung Eun Lee ◽  
Shiv Bharadwaj ◽  
Amaresh Kumar Sahoo ◽  
Umesh Yadava ◽  
Sang Gu Kang
Keyword(s):  
Simulation Analysis ◽  
Binding Free Energy ◽  
Food Additives ◽  
Binding Modes ◽  
Tyrosinase Inhibition ◽  
Generalized Born ◽  
Dynamics Simulations ◽  
Toxic Food

AbstractTyrosinase, exquisitely catalyzes the phenolic compounds into brown or black pigment, inhibition is used as a treatment for dermatological or neurodegenerative disorders. Natural products, such as cyanidin-3-O-glucoside and (−/+)-catechin, are considered safe and non-toxic food additives in tyrosinase inhibition but their ambiguous inhibitory mechanism against tyrosinase is still elusive. Thus, we presented the mechanistic insights into tyrosinase with cyanidin-3-O-glucoside and (−/+)-catechin using computational simulations and in vitro assessment. Initial molecular docking results predicted ideal docked poses (− 9.346 to − 5.795 kcal/mol) for tyrosinase with selected flavonoids. Furthermore, 100 ns molecular dynamics simulations and post-simulation analysis of docked poses established their stability and oxidation of flavonoids as substrate by tyrosinase. Particularly, metal chelation via catechol group linked with the free 3-OH group on the unconjugated dihydropyran heterocycle chain was elucidated to contribute to tyrosinase inhibition by (−/+)-catechin against cyanidin-3-O-glucoside. Also, predicted binding free energy using molecular mechanics/generalized Born surface area for each docked pose was consistent with in vitro enzyme inhibition for both mushroom and murine tyrosinases. Conclusively, (−/+)-catechin was observed for substantial tyrosinase inhibition and advocated for further investigation for drug development against tyrosinase-associated diseases.

scholarly journals Designing And Simulation Analysis Of A Rocket In Ansys

2021 ◽  
Author(s):  
Yashraj Asthana
Keyword(s):  
Environmental Factors ◽  
Drag Force ◽  
Simulation Analysis ◽  
Space Vehicles ◽  
Average Pressure ◽  
Ansys Software ◽  
The Earth

Abstract In this era of science, man is not limited to the earth, instead, is touching the soil of other planets too. Science has made it possible for humans to reach anywhere anytime by any means. One of the greatest inventions is Transportation. This transportation is not only limited to earth but is possible in the Space also. There are Space Vehicles or space crafts indulged in these operations. Energy is needed to operate them. The amount of this energy can be varied depending upon the structure of the vehicle and the forces opposing its movement. So, analysis is important to justify its structure and to calculate the forces exerted on it. Thus, this research includes analysis of a Rocket in Ansys software and determination of drag force acting on it and average pressure acting on it due to the environmental factors. Subjected to these factors we will design and manufactured the required Rocket for our mission.

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