29,621 research outputs found
Futures Studies in the Interactive Society
This book consists of papers which were prepared within the framework of the research project (No. T 048539) entitled Futures Studies in the Interactive Society (project leader: Éva Hideg) and funded by the Hungarian Scientific Research Fund (OTKA) between 2005 and 2009. Some discuss the theoretical and methodological questions of futures studies and foresight; others present new approaches to or
procedures of certain questions which are very important and topical from the perspective of forecast and foresight practice. Each study was conducted in pursuit of improvement in futures fields
Counting on Beauty: The role of aesthetic, ethical, and physical universal principles for interstellar communication
SETI researchers believe that the basic principles of our science and the
science of extraterrestrial beings should be fundamentally the same, and we
should be able to communicate with them by referring to those things we share,
such as the principles of mathematics, physics, and chemistry (a similar
cognitive map of nature). This view assumes that there is only one way to
conceptualize the laws of nature. Consequently, mathematics and the language of
nature should be universal. In this essay, we discuss the epistemological bases
of the last assumptions. We describe all the hypotheses behind the universality
of the laws of nature and the restrictions that any technology should have to
establish contact with other galactic technological civilization. We introduce
some discussions about the limitations of homocentric views. We discuss about
the possible use of aesthetic cognitive universals as well as ethical ones in
the design of interstellar messages. We discuss the role of symmetry as a
universal cognitive map. We give a specific example on how to use the Golden
Section principles to design a hypothetical interstellar message based in
physical and aesthetical cognitive universals. We build a space of
configuration matrix, representing all the variables to be taken into account
for designing an electromagnetic interstellar message (e.g. frequency,
polarization, bandwidth, transmitting power, modulation, rate of information,
galactic coordinates, etc.) against the limitations imposed by physical,
technological, aesthetical and ethical constraints. We show how to use it, in
order to make hypotheses about the characteristics and properties of
hypothetical extraterrestrial artificial signals and their detection by
existing SETI projects.Comment: To appear in "Between Worlds: The Art and Science of Interstellar
Message Composition," Douglas Vakoch (ed.), MIT Press, Cambridge MA. This
manuscript was originally submitted to the editor of the book on November
200
On the Origin of Deep Learning
This paper is a review of the evolutionary history of deep learning models.
It covers from the genesis of neural networks when associationism modeling of
the brain is studied, to the models that dominate the last decade of research
in deep learning like convolutional neural networks, deep belief networks, and
recurrent neural networks. In addition to a review of these models, this paper
primarily focuses on the precedents of the models above, examining how the
initial ideas are assembled to construct the early models and how these
preliminary models are developed into their current forms. Many of these
evolutionary paths last more than half a century and have a diversity of
directions. For example, CNN is built on prior knowledge of biological vision
system; DBN is evolved from a trade-off of modeling power and computation
complexity of graphical models and many nowadays models are neural counterparts
of ancient linear models. This paper reviews these evolutionary paths and
offers a concise thought flow of how these models are developed, and aims to
provide a thorough background for deep learning. More importantly, along with
the path, this paper summarizes the gist behind these milestones and proposes
many directions to guide the future research of deep learning.Comment: 70 pages, 200 reference
Evolving Indoor Navigational Strategies Using Gated Recurrent Units In NEAT
Simultaneous Localisation and Mapping (SLAM) algorithms are expensive to run
on smaller robotic platforms such as Micro-Aerial Vehicles. Bug algorithms are
an alternative that use relatively little processing power, and avoid high
memory consumption by not building an explicit map of the environment. Bug
Algorithms achieve relatively good performance in simulated and robotic maze
solving domains. However, because they are hand-designed, a natural question is
whether they are globally optimal control policies. In this work we explore the
performance of Neuroevolution - specifically NEAT - at evolving control
policies for simulated differential drive robots carrying out generalised maze
navigation. We extend NEAT to include Gated Recurrent Units (GRUs) to help deal
with long term dependencies. We show that both NEAT and our NEAT-GRU can
repeatably generate controllers that outperform I-Bug (an algorithm
particularly well-suited for use in real robots) on a test set of 209 indoor
maze like environments. We show that NEAT-GRU is superior to NEAT in this task
but also that out of the 2 systems, only NEAT-GRU can continuously evolve
successful controllers for a much harder task in which no bearing information
about the target is provided to the agent
Optimisation of Mobile Communication Networks - OMCO NET
The mini conference “Optimisation of Mobile Communication Networks” focuses on advanced methods for search and optimisation applied to wireless communication networks. It is sponsored by Research & Enterprise Fund Southampton Solent University.
The conference strives to widen knowledge on advanced search methods capable of optimisation of wireless communications networks. The aim is to provide a forum for exchange of recent knowledge, new ideas and trends in this progressive and challenging area. The conference will popularise new successful approaches on resolving hard tasks such as minimisation of transmit power, cooperative and optimal routing
Artificial Immune Systems (2010)
The human immune system has numerous properties that make it ripe for
exploitation in the computational domain, such as robustness and fault
tolerance, and many different algorithms, collectively termed Artificial Immune
Systems (AIS), have been inspired by it. Two generations of AIS are currently
in use, with the first generation relying on simplified immune models and the
second generation utilising interdisciplinary collaboration to develop a deeper
understanding of the immune system and hence produce more complex models. Both
generations of algorithms have been successfully applied to a variety of
problems, including anomaly detection, pattern recognition, optimisation and
robotics. In this chapter an overview of AIS is presented, its evolution is
discussed, and it is shown that the diversification of the field is linked to
the diversity of the immune system itself, leading to a number of algorithms as
opposed to one archetypal system. Two case studies are also presented to help
provide insight into the mechanisms of AIS; these are the idiotypic network
approach and the Dendritic Cell Algorithm.Comment: 29 pages, 1 algorithm, 3 figures, Handbook of Metaheuristics, 2nd
Edition, Springe
Learning to Play Othello with N-Tuple Systems
This paper investigates the use of n-tuple systems as position value functions for the game of Othello. The architecture is described, and then evaluated for use with temporal difference learning. Performance is compared with previously de-veloped weighted piece counters and multi-layer perceptrons. The n-tuple system is able to defeat the best performing of these after just five hundred games of self-play learning. The conclusion is that n-tuple networks learn faster and better than the other more conventional approaches
The Biological Concept of Neoteny in Evolutionary Colour Image Segmentation - Simple Experiments in Simple Non-Memetic Genetic Algorithms
Neoteny, also spelled Paedomorphosis, can be defined in biological terms as
the retention by an organism of juvenile or even larval traits into later life.
In some species, all morphological development is retarded; the organism is
juvenilized but sexually mature. Such shifts of reproductive capability would
appear to have adaptive significance to organisms that exhibit it. In terms of
evolutionary theory, the process of paedomorphosis suggests that larval stages
and developmental phases of existing organisms may give rise, under certain
circumstances, to wholly new organisms. Although the present work does not
pretend to model or simulate the biological details of such a concept in any
way, these ideas were incorporated by a rather simple abstract computational
strategy, in order to allow (if possible) for faster convergence into simple
non-memetic Genetic Algorithms, i.e. without using local improvement procedures
(e.g. via Baldwin or Lamarckian learning). As a case-study, the Genetic
Algorithm was used for colour image segmentation purposes by using K-mean
unsupervised clustering methods, namely for guiding the evolutionary algorithm
in his search for finding the optimal or sub-optimal data partition. Average
results suggest that the use of neotonic strategies by employing juvenile
genotypes into the later generations and the use of linear-dynamic mutation
rates instead of constant, can increase fitness values by 58% comparing to
classical Genetic Algorithms, independently from the starting population
characteristics on the search space. KEYWORDS: Genetic Algorithms, Artificial
Neoteny, Dynamic Mutation Rates, Faster Convergence, Colour Image Segmentation,
Classification, Clustering.Comment: 12 pages, 3 figures, at
http://alfa.ist.utl.pt/~cvrm/staff/vramos/ref_35.htm
MS-BACO: A new Model Selection algorithm using Binary Ant Colony Optimization for neural complexity and error reduction
Stabilizing the complexity of Feedforward Neural Networks (FNNs) for the
given approximation task can be managed by defining an appropriate model
magnitude which is also greatly correlated with the generalization quality and
computational efficiency. However, deciding on the right level of model
complexity can be highly challenging in FNN applications. In this paper, a new
Model Selection algorithm using Binary Ant Colony Optimization (MS-BACO) is
proposed in order to achieve the optimal FNN model in terms of neural
complexity and cross-entropy error. MS-BACO is a meta-heuristic algorithm that
treats the problem as a combinatorial optimization problem. By quantifying both
the amount of correlation exists among hidden neurons and the sensitivity of
the FNN output to the hidden neurons using a sample-based sensitivity analysis
method called, extended Fourier amplitude sensitivity test, the algorithm
mostly tends to select the FNN model containing hidden neurons with most
distinct hyperplanes and high contribution percentage. Performance of the
proposed algorithm with three different designs of heuristic information is
investigated. Comparison of the findings verifies that the newly introduced
algorithm is able to provide more compact and accurate FNN model.Comment: 29 pages, 13 figures, 4 tables, 2 algorithms, preprint submissio
08351 Abstracts Collection -- Evolutionary Test Generation
From September 24th to September 29th 2008 the Dagstuhl Seminar
08351 ``Evolutionary Test Generation \u27\u27 was held
in Schloss Dagstuhl~--~Leibniz Center for Informatics.
During the seminar, several participants presented their current
research, and ongoing work and open problems were discussed. Abstracts of
the presentations given during the seminar as well as abstracts of
seminar results and ideas are put together in this paper. The first section
describes the seminar topics and goals in general.
Links to extended abstracts or full papers are provided, if available
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