56 research outputs found
PonyGE2: Grammatical Evolution in Python
Grammatical Evolution (GE) is a population-based evolutionary algorithm,
where a formal grammar is used in the genotype to phenotype mapping process.
PonyGE2 is an open source implementation of GE in Python, developed at UCD's
Natural Computing Research and Applications group. It is intended as an
advertisement and a starting-point for those new to GE, a reference for
students and researchers, a rapid-prototyping medium for our own experiments,
and a Python workout. As well as providing the characteristic genotype to
phenotype mapping of GE, a search algorithm engine is also provided. A number
of sample problems and tutorials on how to use and adapt PonyGE2 have been
developed.Comment: 8 pages, 4 figures, submitted to the 2017 GECCO Workshop on
Evolutionary Computation Software Systems (EvoSoft
The Facebook Algorithm's Active Role in Climate Advertisement Delivery
Communication strongly influences attitudes on climate change. Within
sponsored communication, high spend and high reach advertising dominates. In
the advertising ecosystem we can distinguish actors with adversarial stances:
organizations with contrarian or advocacy communication goals, who direct the
advertisement delivery algorithm to launch ads in different destinations by
specifying targets and campaign objectives. We present an observational
(N=275,632) and a controlled (N=650) study which collectively indicate that the
advertising delivery algorithm could itself be an actor, asserting
statistically significant influence over advertisement destinations,
characterized by U.S. state, gender type, or age range. This algorithmic
behaviour may not entirely be understood by the advertising platform (and its
creators). These findings have implications for climate communications and
misinformation research, revealing that targeting intentions are not always
fulfilled as requested and that delivery itself could be manipulated
Detecting tax evasion: a co-evolutionary approach
We present an algorithm that can anticipate tax evasion by modeling the co-evolution of tax schemes with auditing policies. Malicious tax non-compliance, or evasion, accounts for billions of lost revenue each year. Unfortunately when tax administrators change the tax laws or auditing procedures to eliminate known fraudulent schemes another potentially more profitable scheme takes it place. Modeling both the tax schemes and auditing policies within a single framework can therefore provide major advantages. In particular we can explore the likely forms of tax schemes in response to changes in audit policies. This can serve as an early warning system to help focus enforcement efforts. In addition, the audit policies can be fine tuned to help improve tax scheme detection. We demonstrate our approach using the iBOB tax scheme and show it can capture the co-evolution between tax evasion and audit policy. Our experiments shows the expected oscillatory behavior of a biological co-evolving system
- …