26 Result(s)
within
M. Ausloos
Solid State Physics
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Article
Effects of agents' mobility on opinion spreading in Sznajd model
Under synchronous updating and allowing the agents to move in the lattice or underlying network, we find that the Sznajd model always reaches a consensus as a steady state, – because agent frustrations are ...
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Article
Clusters in weighted macroeconomic networks: the EU case. Introducing the overlap** index of GDP/capita fluctuation correlations
GDP/capita correlations are investigated in various time windows (TW), for the time interval 1990–2005. The target group of countries is the set of 25 EU members, 15 till 2004 plus the 10 countries which joine...
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Article
Drastic events make evolving networks
Co-authorship networks of neighbouring scientific disciplines, i.e. granular (G) media and networks (N) are studied in order to observe drastic structural changes in evolving networks. The data is taken from a...
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Article
Cluster structure of EU-15 countries derived from the correlation matrix analysis of macroeconomic index fluctuations
The statistical distances between countries, calculated for various moving average time windows, are mapped into the ultrametric subdominant space as in classical Minimal Spanning Tree methods. The Moving Aver...
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Article
On the genre-fication of music: a percolation approach
We analyze web-downloaded data on people sharing their music library. By attributing to each music group usual music genres (Rock, Pop ...), and analysing correlations between music groups of different genres ...
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Article
Limit current density in 2D metallic granular packings
The electrical properties of a 2D packed metallic pentagons have been studied. The electrical characterization of such metallic pentagon heaps, like i-V measurements, has been achieved. Two distinct regimes have ...
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Article
Foam imbibition in microgravity
We report an experimental study of aqueous foam imbibition in microgravity with strict mass conservation. The foam is in a Hele-Shaw cell. The bubble edge width ℓ is measured by image analysis. The penetration...
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Article
Are EUR and GBP different words for the same currency?
The British Pound (GBP) is not part of the Euro (EUR) monetary system. In order to find out arguments on whether GBP should join the EUR or not correlations are calculated between GBP exchange rates with respect ...
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Article
Mechanistic approach to generalized technical analysis of share prices and stock market indices
Classical technical analysis methods of stock evolution are recalled, i.e. the notion of moving averages and momentum indicators. The moving averages lead to define death and gold crosses, resistance and support ...
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Article
False Euro (FEUR) exchange rate correlated behaviors and investment strategy
We have searched for correlations and anticorrelations with respect to currencies as CHF, DKK, JPY, and USD in order to understand the EUR behavior. In order to do so we have invented a false euro (FEUR) dating b...
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Article
Special issue on Econophysics
What is “Econophysics"? Who is an “econophysicist"? The coining of a new scientific term, composed of the names of two fields, traditionally considered to be far from each other, brings new dreams to investiga...
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Article
Simultaneous measurements of thermal diffusivity, thermal conductivity and thermopower with application to copper and ceramic superconductors
A home made experimental set-up allows us to measure the thermal conductivity, the thermopower and the thermal diffusivity simultaneously in the temperature range (20-300 K). Therefore the specific heat can be...
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Article
Monte-Carlo analysis of tracer diffusion mechanisms in YBa2Cu3O6+c
A method for estimating, via the Monte-Carlo simulation, the most often realized diffusion mechanisms in 2D ordered structures is presented. Taking as an example the diffusion of oxygen ions in 123 — YBCO high te...
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Article
Anomalous temperature behavior of the resistivity in lightly doped manganites around a metal-insulator phase transition
An unusual temperature and concentration behavior of the resistivity ρ(T, x) in La0.7Ca0.3Mn1−2x CuxO3 is observed at slight Cu do** (0≤x≤0.05). Namely, the introduction of copper results in a splitting of the ...
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Article
Negative magnetoresistance in mixed-valence La0.6Y0.1Ca0.3MnO3: Evidence for charge localization governed by the Curie-Weiss law
The colossal negative magnetoresistance Δρ observed in La0.6Y0.1Ca0.3MnO3 at B=1 T shows an unusual, nearly perfect symmetry (around the peak temperature T 0=160 K), suggestive of a Curie-Weiss-dominated transpor...
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Article
Probing the field-induced variation of the chemical potential in Bi2Sr2CaCu2Oy via magneto-thermopower measurements
Approximating the shape of the magneto-thermoelectric power (TEP) ΔS(T,H) measured in Bi2Sr2CaCu2Oy by an asymmetric linear triangle of the form ΔS(T,H)≃S p (H)±B ±(H)(T ...
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Article
A sharp decrease of resistivity in La0.7Ca0.3Mn0.96Cu0.04O3: Evidence for Cu-assisted coherent tunneling of spin Polarons
Nearly a 50% decrease of the resistivity ρ(T, x) is observed upon just 4% Cu do** at the Mn site of La2/3Ca1/3Mn1−x CuxO3. When the observed phenomenon is attributed to a decrease of the spin-polaron energy E σ
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Article
Visualizing the log-periodic pattern before crashes
We present a method for visualizing the pattern which we believe to be a precursor signature of financial crashes (or ruptures). The log-periodicity of the pattern is investigated through the envelope function...
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Article
Low q-moment multifractal analysis of Gold price, Dow Jones Industrial Average and BGL-USD exchange rate
An estimate of the low q-moment values of the assumed multifractal spectrum of Gold price, Dow Jones Industrial Average (DJIA) and Bulgarian Lev - USA Dollar (BGL-USD) exchange rate over a 6 1/2 year time span ha...
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Article
Multi-affine analysis of typical currency exchange rates
For foreign currency exchange rates, multi-affine analysis can put quantitatively into evidence the differences between correlated (daily closing market) values and random walks in time dependent data. The H(q) s...
