The Use of Analog Computer Simulation for Learning Modeling Concepts and Skills

1972 ◽  
Vol 1 (2) ◽  
pp. 135-153
Author(s):  
Thomas T. Liao
Keyword(s):  
Computer Simulation ◽  
Educational Technology ◽  
Computer Simulations ◽  
Research Study ◽  
Analog Computer ◽  
Columbia University ◽  
Doctoral Research

This paper reports on the need, rationale, design and findings of a doctoral research study done at Teacher's College, Columbia University. Significant differences were found in several comparisons which were done to obtain answers to basic questions about the usage of analog computer simulations. Suggestions are also made for further research in this area of educational technology.

A Computer Simulation Approach for Engineering Air-Jet Spun Yarns

1997 ◽  
Vol 67 (3) ◽  
pp. 223-230 ◽  
Author(s):  
Rangaswamy Rajamanickam ◽  
Steven M. Hansen ◽  
Sundaresan Jayaraman
Keyword(s):  
Computer Simulation ◽  
Computer Simulations ◽  
Fiber Length ◽  
Experimental Investigations ◽  
Simulation Approach ◽  
Air Jet ◽  
Fiber Fineness ◽  
Spun Yarns ◽  
Yarn Count ◽  
Wrap Angle

A computer simulation approach for engineering air-jet spun yarns is proposed, and the advantages of computer simulations over experimental investigations and stand-alone mathematical models are discussed. Interactions of the following factors in air-jet spun yarns are analyzed using computer simulations: yarn count and fiber fineness, fiber tenacity and fiber friction, fiber length and fiber friction, and number of wrapper fibers and wrap angle. Based on the results of these simulations, yarn engineering approaches to optimize strength are suggested.

Computer Simulation of an Synthetic Ultraviolet Absorbent in the Interface of DMB and DMF

2010 ◽  
Vol 146-147 ◽  
pp. 966-971
Author(s):  
Qi Hua Jiang ◽  
Hai Dong Zhang ◽  
Bin Xiang ◽  
Hai Yun He ◽  
Ping Deng
Keyword(s):  
Computer Simulation ◽  
Computer Simulations ◽  
Density Functional ◽  
Density Functional Method ◽  
Mean Field ◽  
Functional Method ◽  
Dynamic Density ◽  
Interface Phase ◽  
Simulation Results

This work studies the aggregation of an synthetic ultraviolet absorbent, named 2-hydroxy-4-perfluoroheptanoate-benzophenone (HPFHBP), in the interface between two solvents which can not completely dissolve each other. The aggregation is studied by computer simulations based on a dynamic density functional method and mean-field interactions, which are implemented in the MesoDyn module and Blend module of Material Studios. The simulation results show that the synthetic ultraviolet absorbent diffuse to the interface phase and the concentration in the interface phase is greater than it in the solvents phase.

scholarly journals Transformation of Gear Inter-Teeth Forces into Acceleration and Velocity

1999 ◽  
Vol 5 (3) ◽  
pp. 203-218 ◽  
Author(s):  
Walter Bartelmus
Keyword(s):  
Computer Simulation ◽  
Mathematical Modelling ◽  
Computer Simulations ◽  
Production Technology ◽  
Vibration Acceleration ◽  
Acceleration Signal ◽  
Field Practice ◽  
Design Production ◽  
Extended Interpretation

The paper deals with mathematical modelling and computer simulation of a gearbox system. Results of computer simulation show new possibilities of extended interpretation of a diagnostic acceleration signal if signal is obtained by synchronous summation. Four groups of factors: design, production technology, operation, change of gear condition are discussed. Results of computer simulations give the relation between inter-teeth forces and vibration (acceleration, velocity). Some results of computer simulations are referred to the results obtained in rig measurements and in field practice. The paper shows a way of increasing the expert's knowledge on the diagnostic signal, which is generated by a gearbox system, on a base of mathematical modelling and computer simulation.

Computer Simulation Studies of Fracture in Vitreous Silica

2002 ◽  
Vol 731 ◽  
Author(s):  
Romulo Ochoa ◽  
Michael Arief ◽  
Joseph H. Simmons
Keyword(s):  
Molecular Dynamics ◽  
Computer Simulation ◽  
Computer Simulations ◽  
Silica Glass ◽  
Vitreous Silica ◽  
Uniaxial Strain ◽  
Force Function ◽  
Simulation Studies ◽  
Previous Fracture ◽  
Computer Simulation Studies

AbstractWe conduct molecular dynamics computer simulations of fracture in silica glass using the van Beest, Kramer, and van Santen model. Stress is applied by uniaxial strain at different pulling rates. Comparisons with previous fracture simulations of silica that used the Soules force function are presented. We find that in both models stress is relieved by rotation of the (SiO4)-2 tetrahedrons, increasing Si-O-Si bonding angles, and only small changes in the tetrahedron dimensions and O-Si-O angles.

Special Report: Advanced Educational Technology—A 5-Year Program of the NATO Science Committee

1989 ◽  
Vol 18 (1) ◽  
pp. 69-77
Author(s):  
Thomas T. Liao
Keyword(s):  
Educational Technology ◽  
International Collaboration ◽  
Collaborative Research ◽  
Research Study ◽  
Special Report ◽  
Science Committee ◽  
Advanced Study ◽  
International Aspects ◽  
Permanent Residents

The aim of the program is to stimulate and facilitate international collaboration among scientists of the member countries in areas related to advanced educational technology. Sponsored activities are advanced research workshops, advanced study institutes, collaborative research, and research, study, and lecture visits. NATO grants are intended to cover only part of the expenses involved in the international aspects of the sponsored activities. Citizens or permanent residents of one of the member countries of NATO possessing qualifications appropriate to the proposed activity are eligible.

scholarly journals Quaternary regenerative CMOS logic circuits with high-impedance output state

2005 ◽  
Vol 18 (3) ◽  
pp. 505-514
Author(s):  
Dusanka Bundalo ◽  
Branimir Ðordjevic ◽  
Zlatko Bundalo
Keyword(s):  
Computer Simulation ◽  
Computer Simulations ◽  
Delay Time ◽  
Propagation Delay ◽  
Logic Circuits ◽  
Output State ◽  
High Impedance ◽  
Multiple Valued Logic ◽  
Propagation Delay Time ◽  
Simulation Results

Principles and possibilities of synthesis and design of quaternary multiple valued regenerative CMOS logic circuits with high-impedance output state are de- scribed and proposed in the paper. Two principles of synthesis and implementation of CMOS regenerative quaternary multiple-valued logic circuits with high-impedance output state are proposed and described: the simple circuits with smaller number of transistors, and the buffer/driver circuits with decreased propagation delay time. The schemes of such logic circuits are given and analyzed by computer simulations. Some of computer simulation results confirming descriptions and conclusions are also given in the paper.

Reciprocity Research and Its Implications for the Negotiation Process

1998 ◽  
Vol 3 (2) ◽  
pp. 151-169 ◽  
Author(s):  
◽  
Keyword(s):  
Computer Simulation ◽  
Empirical Research ◽  
Computer Simulations ◽  
Social Dilemma ◽  
Negotiation Process ◽  
Behavioral Research ◽  
Previous Trial ◽  
Behavioral Strategies ◽  
Social Scientists ◽  
Tit For Tat

AbstractWhile social scientists have discussed the issue of reciprocation for many years, much of current behavioral research stems from Robert Axelrod's computer simulations of behavioral strategies in prisoner's dilemma games. Axelrod showed that a tit-for-tat strategy – cooperate on the first trial, and thereafter behave as your opponent did on the previous trial – earned a higher average payoff than any other tested strategy. We review both the computer simulation and empirical research that followed his studies. We suggest that it would be fruitful to extend this research to the negotiation paradigm, for two reasons: (1) many of the findings have direct bearing on elements of the negotiation process, and (2) there are unique aspects of the negotiation process that pose interesting questions for social dilemma research.

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