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Ali Eftekhari

Publications and source records attributed to Ali Eftekhari.

2 recordsLinked to original sources

Fractal geometry of literature: first attempt to Shakespeare's works

It was demonstrated that there is a geometrical order in the structure of literature. Fractal geometry as a modern mathematical approach and a new geometrical viewpoint on natural objects including both processes and structures was employed for analysis of literature. As the first study, the works of William Shakespeare were chosen as the most important items in western literature. By counting the number of letters applied in a manuscript, it is possible to study the whole manuscript statistically. A novel method based on basic assumption of fractal geometry was proposed for the calculation of fractal dimensions of the literature. The results were compared with Zipf's law. Zipf's law was successfully used for letters instead of words. Two new concepts namely Zipf's dimension and Zipf's order were also introduced. It was found that changes of both fractal dimension and Zipf's dimension are similar and dependent on the manuscript length. Interestingly, direct plotting the data obtained in semi-logarithmic and logarithmic forms also led to a power-law.

cs.CL

Inspecting plastic deformation of Pd by means of fractal geometry

The influence of phase transformation-induced plastic deformation in Pd|H system on the electrode surface was investigated. Since the Pd surface is subject of severe plastic deformation during this process, the structure and roughness of the electrode surface significantly changes. Quantitative analysis of the electrode surfaces for comparative study of such changes is a valuable tool to inspect the plastic deformation induced. Fractal dimension can be used as a quantitative measure for this purpose. Since inappropriate methods may lead to significant errors, an appropriate approach was proposed for the determination of fractal dimensions in such systems. It was demonstrated that the surface roughness generated is mainly due to the plastic deformation induced, not the other side processes. The methodology is of general interest for the investigation of plastic deformations. The methodology is of general interest for the investigation of plastic deformations, and also other solid-state structural changes.

physics.chem-ph