Pedro Holderbaum on Greece
The Parthenon is problably the most famous surviving site from Ancient Greece. Standing at the heart of The Acropolis in the centre of Athens, the Parthenon is a monument to Classical Greek civilisation. Built during the golden age of Pericles – the famous Athenian statesman – the Parthenon was originally constructed to be a temple to the Ancient Greek goddess Athena.
Sobre o livro de John Wolf: Contagem Descrente.
Ao canto da sala descansava uma bengala gasta, porventura cansada de tanto andar sem o amparo de uma bengala.
Este livro é uma coletânea de contos decalcados a partir do nosso quotidiano. O homem em conflito com a sua consciência, marcado pela circunstância social e pelo egoísmo. O livro apresenta uma estrutura temática, não óbvia, abrindo no primeiro conto com o homem enquanto indivíduo, focado em si mesmo, fechando com um conto sobre o homem político e o seu papel na sociedade. Na voz de um narrador irrequieto, tricotando entre a realidade que o envolve e um zapping de pensamentos, trasvazam-se os limites de uma consciência em permanente conflito.
O insecto fossilizado no pára-brisas deixou um bilhete fácil e sacrificou-se na entrega da mensagem.
O narrador-personagem é por vezes um objeto, como o manual da passadeira de fitness, agredindo o personagem-homem, orgânico, que procura restabelecer à custa da tecnologia…
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In this paper we present an analysis of the behavior of Italian Twitter users during national political elections. We monitor the volumes of the tweets related to the leaders of the various political parties and we compare them to the elections results. Furthermore, we study the topics that are associated with the co-occurrence of two politicians in the same tweet. We cannot conclude, from a simple statistical analysis of tweet volume and their time evolution, that it is possible to precisely predict the election outcome (or at least not in our case of study that was characterized by a “too-close-to-call” scenario). On the other hand, we found that the volume of tweets and their change in time provide a very good proxy of the final results. We present this analysis both at a national level and at smaller levels, ranging from the regions composing the country to macro-areas (North, Center, South).
Multi-Level Geographical Study of Italian Political Elections from Twitter Data
Caldarelli G, Chessa A, Pammolli F, Pompa G, Puliga M, et al.
PLoS ONE 9(5): e95809 (2014)
See on www.plosone.org
Guided self-organization can be regarded as a paradigm proposed to understand how to guide a self-organizing system towards desirable behaviors, while maintaining its non-deterministic dynamics with emergent features. It is, however, not a trivial problem to guide the self-organizing behavior of physically embodied systems like robots, as the behavioral dynamics are results of interactions among their controller, mechanical dynamics of the body, and the environment. This paper presents a guided self-organization approach for dynamic robots based on a coupling between the system mechanical dynamics with an internal control structure known as the attractor selection mechanism. The mechanism enables the robot to gracefully shift between random and deterministic behaviors, represented by a number of attractors, depending on internally generated stochastic perturbation and sensory input. The robot used in this paper is a simulated curved beam hopping robot: a system with a variety of mechanical dynamics which depends on its actuation frequencies. Despite the simplicity of the approach, it will be shown how the approach regulates the probability of the robot to reach a goal through the interplay among the sensory input, the level of inherent stochastic perturbation, i.e., noise, and the mechanical dynamics.
Guided Self-Organization in a Dynamic Embodied System Based on Attractor Selection Mechanism
Surya G. Nurzaman , Xiaoxiang Yu, Yongjae Kim and Fumiya Iida
Entropy 2014, 16(5), 2592-2610
See on www.mdpi.com
Terry Tao once upon a time on the Balck-Scholes Equation.
Some time ago, I wrote a short unpublished note (mostly for my own benefit) when I was trying to understand the derivation of the Black-Scholes equation in financial mathematics, which computes the price of various options under some assumptions on the underlying financial model. In order to avoid issues relating to stochastic calculus, Itō’s formula, etc. I only considered a discrete model rather than a continuous one, which makes the mathematics much more elementary. I was recently asked about this note, and decided that it would be worthwhile to expand it into a blog article here. The emphasis here will be on the simplest models rather than the most realistic models, in order to emphasise the beautifully simple basic idea behind the derivation of this formula.
The basic type of problem that the Black-Scholes equation solves (in particular models) is the following. One has an underlying financial instrument
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Learning to Code: a mission, a life goal, a cause. A way of Life.
Teens, tweens and kids are often referred to as “digital natives.” Having grown up with the Internet, smartphones and tablets, they’re often extraordinarily adept at interacting with digital technology. But Mitch Resnick, who spoke at TEDxBeaconStreet in November, is skeptical of this descriptor. Sure, young people can text and chat and play games, he says, “but that doesn’t really make you fluent.”
[ted_talkteaser id=1657]Fluency, Resnick proposes in today’s talk, comes not through interacting with new technologies, but through creating them. The former is like reading, while the latter is like writing. He means this figuratively — that creating new technologies, like writing a book, requires creative expression — but also literally: to make new computer programs, you actually must write the code.
The point isn’t to create a generation of programmers, Resnick argues. Rather, it’s that coding is a gateway to broader learning.“When you learn to read, you…
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