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Zipf's law unzipped
Why does Zipf's law give a good description of data from seemingly completely unrelated phenomena? Here it is argued that the reason is that they can all be described as outcomes of a ubiquitous raExpand
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Family name distributions: master equation approach.
Although cumulative family name distributions in many countries exhibit power-law forms, there also exist counterexamples. The origin of different family name distributions across countries isExpand
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Korean Family Name Distribution in the Past
We empirically study the genealogical trees of ten families for about five centuries in Korea. Although each family tree contains only the paternal part, the family names of women married to theExpand
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Upper transition point for percolation on the enhanced binary tree: a sharpened lower bound.
  • S. K. Baek
  • Mathematics, Physics
  • Physical review. E, Statistical, nonlinear, and…
  • 17 May 2012
Hyperbolic structures are obtained by tiling a hyperbolic surface with negative Gaussian curvature. These structures generally exhibit two percolation transitions: a system-wide connection can beExpand
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The comparison between Behçet's disease and spondyloarthritides: does Behçet's disease belong to the spondyloarthropathy complex?
This study was to clarify whether Behcet's disease (BD) could be classified into the spondyloarthropathy (SpA) complex. It was undertaken on 58 patients with BD (BD group), 56 patients with SpA (SpAExpand
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Intelligent tit-for-tat in the iterated prisoner's dilemma game.
  • S. K. Baek, B. Kim
  • Computer Science, Biology
  • Physical review. E, Statistical, nonlinear, and…
  • 1 July 2008
TLDR
We seek a route to the equilibrium where all the agents cooperate in the iterated prisoner's dilemma game on a two-dimensional plane, focusing on the role of tit-for-tat strategy, which implies how robust strategies are adopted when provided with an enhanced memory capacity. Expand
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Transfer Entropy Analysis of the Stock Market
In terms of transfer entropy, we investigated the strength and the direction of information transfer in the US stock market. Through the directionality of the information transfer, the moreExpand
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Flow improvement caused by agents who ignore traffic rules.
TLDR
A system of agents moving along a road in both directions is studied numerically within a cellular-automata formulation. Expand
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Non-Kosterlitz-Thouless transitions for the q-state clock models.
The q -state clock model with the cosine potential has a single phase transition for q≤4 and two transitions for q≥5 . It is shown by Monte Carlo simulations that the helicity modulus for theExpand
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A Paradoxical Property of the Monkey Book
TLDR
A 'monkey book' is a book consisting of a random sequence of letters and blanks, where a group of letters surrounded by two blanks is defined as a word. Expand
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