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Marcel Ausloos

Université de Liège, Physics, Emeritus

Unversity of Leicester, Business, Faculty Member

The Bucharest Academy of Economic Studies, Statistics and Econometrics, Faculty Member

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Papers by Marcel Ausloos

Nanosized Barium Hexaferrite Powders Obtained by a Single Microemulsion Technique

Solid State Phenomena, 2008

Barium hexaferrite (BaFe12O19) powders of particle size of 130 and 180 nm were synthesized by a s... more Barium hexaferrite (BaFe12O19) powders of particle size of 130 and 180 nm were synthesized by a single microemulsion technique. The influence of the concentration of Ba2+ and Fe3+ metallic ions in the aqueous phase in the microemulsion system on the particle size distribution, crystallinity and magnetic properties of BaFe12O19 was studied. The coercive force and saturation magnetization of the sample obtained at a lower concentration of metallic cations in the aqueous phase were higher than those of the sample obtained at higher concentration.

Peer to Peer Multiagent Competition and Cooperation with Network Effec

Socio-economical analysis of Italy: The case of hagiotoponym cities

This paper considers joining the economical characteristics of Italian cities with a relevant soc... more This paper considers joining the economical characteristics of Italian cities with a relevant sociological aspect of the Catholic saints. More than in other countries, a high percentage of Italian cities are toponyms coming from the name of specific saints (hagiotoponym). The link with Italian religious views is distinct. The statistical analysis of the economic contributions that each hagiotoponym city provides to the Italian GDP is considered. Such an analysis is also based on the comparison with Italian data and is considered with the Theil, Gini, and Herfindahl-Hirschman indices. It is obtained that hagiotoponym cities represent a proxy of the overall Italian reality of medium-sized cities in the case of outliers removal.

Hint of a Universal Law for the Financial Gains of Competitive Sport Teams. The Case of Tour de France Cycle Race

Fundamental Analysis in China: An Empirical Study of the Relationship between Financial Ratios and Stock Prices

The informational context is regularly questioned in a transitional economic regime like the one ... more The informational context is regularly questioned in a transitional economic regime like the one implemented in China or Vietnam. This article investigates this issue and the predictive power of fundamental analysis in such context and more precisely in a Chinese context with an analysis of 3 different industries (media, power, and steel). Through 3 different kinds of correlation , we examine 25 financial determinants for 60 Chinese listed companies between 2011 and 2015. Our results show that fundamental analysis can effectively be used as an investment tool in transitional economic context. Contrasting with the EMH for which the accounting information is instantaneously integrated into the financial information (stock prices), our study suggests that these two levels of information are not synchronized in China opening therefore a door for a fundamental analysis based prediction. Furthermore , our results also indicate that accounting information illustrates quite well the economic reality since financial reports in each industry can disclose a part of stock value information in line with the economic situation of the industry under consideration.

Efficiency in managing peer-review of scientific manuscripts - Editors' perspective

by Marcel Ausloos and O. Nedic

The purpose of this paper is to introduce a model for measuring the efficiency in managing peer-r... more The purpose of this paper is to introduce a model for measuring the efficiency in managing peer-review of scientific manuscripts by editors. The approach employed is based on the assumption that the editorial aim is to manage publication with high efficiency, employing the least amount of editorial resources. Efficiency is defined in this research as a measure based on 7 variables. An on-line survey was constructed and editors of journals originating from Serbia regularly publishing articles in the field of chemistry were invited to participate. An evaluation of the model is given based on responses from 24 journals and 50 editors. With this investigation we aimed to contribute to our understanding of the peer-review process and, possibly, offer a tool to improve the "efficiency" in journal editing. The proposed protocol may be adapted by other journals in order to assess the managing potential of editors.

Intriguing behavior when testing the impact of quotation marks usage in Google search results

Your article is protected by copyright and all rights are held exclusively by Springer Science+Bu... more Your article is protected by copyright and all rights are held exclusively by Springer Science+Business Media B.V., part of Springer Nature. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com".

Efficiency in managing peer-review of scientific manuscripts - Editors' perspective

by A. Dekanski, O. Nedic, and Marcel Ausloos

Journal of the Serbian Chemical Society, 2018

The purpose of this paper is to introduce a model for measuring the efficiency in managing peer-r... more The purpose of this paper is to introduce a model for measuring the efficiency in managing peer-review of scientific manuscripts by editors. The approach employed is based on the assumption that the editorial aim is to manage publication with high efficiency, employing the least amount of editorial resources. Efficiency is defined in this research as a measure based on 7 variables. An on-line survey was constructed and editors of journals originating from Serbia regularly publishing articles in the field of chemistry were invited to participate. An evaluation of the model is given based on responses from 24 journals and 50 editors. With this investigation we aimed to contribute to our understanding of the peer-review process and, possibly, offer a tool to improve the "efficiency" in journal editing. The proposed protocol may be adapted by other journals in order to assess the managing potential of editors.

The Ising model in a Bak–Tang–Wiesenfeld sandpile

Physica A: Statistical Mechanics and its Applications, 2007

We study the spin-1 Ising model with non-local constraints imposed by the Bak-Tang-Wiesenfeld san... more We study the spin-1 Ising model with non-local constraints imposed by the Bak-Tang-Wiesenfeld sandpile model of self-organized criticality (SOC). The model is constructed as if the sandpile is being built on a (honeycomb) lattice with Ising interactions. In this way we combine two models that exhibit power-law decay of correlation functions characterized by different exponents. We discuss the model properties through an order parameter and the mean energy per node, as well as the temperature dependence of their fourth-order Binder cumulants. We find (i) a thermodynamic phase transition at a finite Tc between paramagnetic and antiferromagnetic phases, and (ii) that above Tc the correlation functions decay in a way typical of SOC. The usual thermodynamic criticality of the two-dimensional Ising model is not affected by SOC constraints (the specific heat critical exponent α ≈ 0), nor are SOC-induced correlations affected by the interactions of the Ising model. Even though the constraints imposed by the SOC model induce long-range correlations, as if at standard (thermodynamic) criticality, these SOC-induced correlations have no impact on the thermodynamic functions.

Granular matter: A wonderful world of clusters in far-from-equilibrium systems

Physica A: Statistical Mechanics and its Applications, 2005

In this paper, we recall various features of non equilibrium granular systems. Clusters with spec... more In this paper, we recall various features of non equilibrium granular systems. Clusters with specific properties are found depending on the packing density, going from loose (a granular gas) to sintered (though brittle) polycrystalline materials. The phase space available can be quite different. Unexpected features, with respect to standard or expected ones in classical fluids or solids, are observed, -like slow relaxation processes or anomalous electrical and thermoelectrical transport property dependences. The cases of various pile structures and the interplay between classical phase transitions and self-organized criticality for avalanches are also outlined.

Phase diagrams of model magnetofluids

by Marcel Ausloos and Jacek M Kowalski

IEEE Transactions on Magnetics, 1980

A model o f f e r r o f l u i d s i s t r e a t e d a n a l yt i c a l l y a n d n u m e r i c a ... more A model o f f e r r o f l u i d s i s t r e a t e d a n a l yt i c a l l y a n d n u m e r i c a l l y i n o r d e r t o d i s c u s s t h e p h a s e d i a g r a m s . M a g n e t i c p a r t i c l e s are supposed t o s i t on a l a t t i c e and t o i n t e r a c t through a magnetic Kac p o t e n t i a l and through a s h o r t r a n g e p o t e n t i a l b e t w e e n n e a r e s t neighbours.

Cu Doping as a Tool for Understanding CMR

Key Engineering Materials, 2002

... B, 59, 533 (1999). [4] CNR Rao, A. Arulraj, PN Santhosh, AK Cheetham, Chem. Mater., 10, 2714 ... more

Data science for assessing possible tax income manipulation: the case of Italy

by Tariq Ahmad Mir and Marcel Ausloos

Chaos, Solitons and Fractals, 2017

This paper explores a real-world fundamental theme under a data science perspective. It specifica... more This paper explores a real-world fundamental theme under a data science perspective. It specifically discusses whether fraud or manipulation can be observed in and from municipality income tax size distributions, through their aggregation from citizen fiscal reports. The study case pertains to official data obtained from the Italian Ministry of Economics and Finance over the period 2007-2011. All Italian (20) regions are considered. The considered data science approach concretizes in the adoption of the Benford first digit law as quantitative tool. Marked disparities are found,-for several regions, leading to unexpected " conclusions ". The most eye browsing regions are not the expected ones according to classical imagination about Italy financial shadow matters.

Iron-YBCO heterostructures and their application for trapped field superconducting motor

by T. Coombs and Marcel Ausloos

Journal of Physics: Conference Series, 2006

In this work we report on the magnetic behavior of the heterostructures formed by bulk based YBCO... more In this work we report on the magnetic behavior of the heterostructures formed by bulk based YBCO rings and ferromagnetic yoke. The magnetization cycle has been performed by an In-Field Hall Mapping technique. A video-like recording of the magnetization process makes it possible to obtain the magnetization of selected areas. The current flowing through the superconducting rings can be deduced

Test of two hypotheses explaining the size of populations in a system of cities

Journal of Applied Statistics, 2015

Two classical hypotheses are examined about the population growth in a system of cities : Hypothe... more Two classical hypotheses are examined about the population growth in a system of cities : Hypothesis 1 pertains to Gibrat's and Zipf 's theory which states that the city growth-decay process is size independent; Hypothesis 2 pertains to the so called Yule process which states that the growth of populations in cities happens when (i) the distribution of the city population initial size obeys a log-normal function, (ii) the growth of the settlements follows a stochastic process. The basis for the test is some official data on Bulgarian cities at various times. This system was chosen because (i) Bulgaria is a country for which one does not expect biased theoretical conditions; (ii) the city populations were determined rather precisely. The present results show that: (i) the population size growth of the Bulgarian cities is size dependent, whence Hypothesis 1 is not confirmed for Bulgaria; (ii) the population size growth of Bulgarian cities can be described by a double Pareto log-normal distribution, whence Hypothesis 2 is valid for the Bulgarian city system. It is expected that this fine study brings some information and light on other usually considered to be more pertinent countries of city systems.

Econophysics of a religious cult: The Antoinists in Belgium [1920–2000]

Physica A: Statistical Mechanics and its Applications, 2012

In the framework of applying econophysics ideas in religious topics, the finances of the Antoinis... more In the framework of applying econophysics ideas in religious topics, the finances of the Antoinist religious movement organized in Belgium between 1920 and 2000 are studied. The interest of investigating financial aspects of such a, sometimes called, sect stems in finding characteristics of conditions and mechanisms under which definitely growth AN D decay features of communities can be understood. The legally reported yearly income and expenses between 1920 and 2000 are studied. A three wave asymmetric regime is observed over a trend among marked fluctuations at time of crises. The data analysis leads to propose a general mechanistic model taking into account an average GDP growth, an oscillatory monetary inflation and a logistic population drift.

Coherent measures of the impact of co-authors in peer review journals and in proceedings publications

Physica A: Statistical Mechanics and its Applications, 2015

This paper focuses on the coauthor effect in different types of publications, usually not equally... more This paper focuses on the coauthor effect in different types of publications, usually not equally respected in measuring research impact. A priori unexpected relationships are found between the total coauthor core value, ma, of a leading investigator (LI), and the related values for their publications in either peer review journals (j) or in proceedings (p). A surprisingly linear relationship is found: m the findings suggest an immediate test of coherence of scientific authorship in scientific policy processes.

Cross ranking of cities and regions: population versus income

Journal of Statistical Mechanics: Theory and Experiment, 2015

This paper explores the relationship between the inner economical structure of communities and th... more This paper explores the relationship between the inner economical structure of communities and their population distribution through a rank-rank analysis of official data, along statistical physics ideas within two techniques. The data is taken on Italian cities. The analysis is performed both at a global (national) and at a more local (regional) level in order to distinguish "macro" and "micro" aspects. First, the rank-size rule is found not to be a standard power law, as in many other studies, but a doubly decreasing power law. Next, the Kendall τ and the Spearman ρ rank correlation coefficients which measure pair concordance and the correlation between fluctuations in two rankings, respectively, -as a correlation function does in thermodynamics, are calculated for finding rank correlation (if any) between demography and wealth. Results show non only global disparities for the whole (country) set, but also (regional) disparities, when comparing the number of cities in regions, the number of inhabitants in cities and that in regions, as well as when comparing the aggregated tax income of the cities and that of regions. Different outliers are pointed out and justified. Interestingly, two classes of cities in the country and two classes of regions in the country are found. "Common sense" social, political, and economic considerations sustain the findings. More importantly, the methods show that they allow to distinguish communities, very clearly, when specific criteria are numerically sound. A * Corresponding address: specific modeling for the findings is presented, i.e. for the doubly decreasing power law and the two phase system, based on statistics theory, e.g., urn filling. The model ideas can be expected to hold when similar rank relationship features are observed in fields. It is emphasized that the analysis makes more sense than one through a Pearson Π value-value correlation analysis.

Thermal conductivity of twinned YBa2Cu3O7-x and tweeded YBa2(Cu0.95Fe0.05)3O7-x in a magnetic field: Evidence for intrinsic proximity effect

Solid State Communications, 1993

$Research paper thumbnail of Comment on {open_quotes}Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors{close_quotes}$

Comment on {open_quotes}Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors{close_quotes}

Phys Rev B, 1997