Alejandro Rivero

ORCID: 0000-0002-6689-214X
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About
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Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • Complex Network Analysis Techniques
  • Black Holes and Theoretical Physics
  • Opinion Dynamics and Social Influence
  • Noncommutative and Quantum Gravity Theories
  • Homotopy and Cohomology in Algebraic Topology
  • Advanced Topics in Algebra
  • Social Media and Politics
  • scientometrics and bibliometrics research
  • Quantum Mechanics and Applications
  • Advanced Operator Algebra Research
  • Mathematics and Applications
  • Physics of Superconductivity and Magnetism
  • History and Theory of Mathematics
  • Computational Physics and Python Applications
  • Nuclear physics research studies
  • Algebraic structures and combinatorial models
  • Misinformation and Its Impacts
  • Quantum Electrodynamics and Casimir Effect
  • Dark Matter and Cosmic Phenomena
  • Quantum Mechanics and Non-Hermitian Physics
  • Complex Systems and Time Series Analysis
  • Classical Philosophy and Thought
  • Geometric and Algebraic Topology

Universidad de Zaragoza
2008-2024

Instituto de Biocomputación y Física de Sistemas Complejos
2018

Universidad Carlos III de Madrid
2000-2001

The recent wave of mobilizations in the Arab world and across Western countries has generated much discussion on how digital media is connected to diffusion protests. We examine that connection using data from surge took place Spain May 2011. study recruitment patterns Twitter network find evidence social influence complex contagion. identify position early participants (i.e. leaders process) users who acted as seeds message cascades spreaders information). cannot be characterized by a...

10.1038/srep00197 article EN cc-by-nc-sa Scientific Reports 2011-12-15

The number of people using online social networks in their everyday life is continuously growing at a pace never saw before. This new kind communication has an enormous impact on opinions, cultural trends, information spreading and even the commercial success products. More importantly, have revealed as fundamental organizing mechanism recent country-wide movements. In this paper, we provide quantitative analysis structural dynamical patterns emerging from activity network around ongoing May...

10.1371/journal.pone.0023883 article EN cc-by PLoS ONE 2011-08-19

Social media have provided plentiful evidence of their capacity for information diffusion. Fads and rumors but also social unrest riots travel fast affect large fractions the population participating in online networks (OSNs). This has spurred much research regarding mechanisms that underlie contagion, who (if any) can unleash system-wide dissemination. Access to real data, both topology---the network friendships---and dynamics---the actual way which OSNs users interact, is crucial decipher...

10.1103/physreve.85.066123 article EN Physical Review E 2012-06-19

We consider the sampling bias introduced in study of online networks when collecting data through publicly available APIs (application programming interfaces). assess differences between three samples Twitter activity; empirical context is given by political protests taking place May 2012. track communication around these for period one month, and reconstruct network mentions re-tweets according to search streaming APIs, different filtering parameters. find that smaller do not offer an...

10.2139/ssrn.2185134 article EN SSRN Electronic Journal 2012-01-01

The emergence of collective intelligence has been studied in much greater detail small groups than larger ones. Nevertheless, several hundreds or thousands members, it is well-known that the social environment exerts a considerable influence on individual behavior. A few recent papers have dealt with some aspects large group situations, but not provided an in-depth analysis role interactions among members creation ideas, as well group's overall performance. In this study, we report...

10.3389/fpsyg.2022.848048 article EN cc-by Frontiers in Psychology 2022-11-02

We present a short historical and bibliographical review of the lepton mass formula Yoshio Koide, as well some speculations on its extensions to quark neutrino masses, possible relations more recent theoretical developments.

10.48550/arxiv.hep-ph/0505220 preprint EN other-oa arXiv (Cornell University) 2005-01-01

With the negative sign for $\sqrt m_s$, quarks strange, charm and bottom make a Koide tuple. It continues c-b-t tuple previously found by Rodejohann Zhang and, more peculiar, it is quasi-orthogonal to original lepton triplet.

10.48550/arxiv.1111.7232 preprint EN other-oa arXiv (Cornell University) 2011-01-01

We explore the relationship between collaborations in writing papers and academic productivity of economists and, particularly, we describe magnitude intensity co-authorship among economists. To that end, employ interaction maps from Complex Systems methods to study global properties specific networks. use 8,253 JCR ISI-WOK, published by 5,188 Spanish institutions, their co-authors, up 8,202 researchers, 2002 2014, identify determine collaborative structure economics research Spain, with its...

10.2139/ssrn.2803840 article EN SSRN Electronic Journal 2016-01-01

The implementation of the United Nations (UN) Sustainable Development Goals (SDGs) presents a vast and intricate array challenges, including establishment governance systems that engage all societal actors, particularly nongovernmental entities youth, in proposing solutions decision-making. This article investigates potential collective intelligence as tool within citizen science to create for SDG-related challenges establish or enhance necessary mechanisms. We detail experiment conducted...

10.5334/cstp.587 article EN cc-by Citizen Science Theory and Practice 2023-01-01

We propose an interpretation for the adjoint representation of $SO(32)$ group to classify scalars a generic Supersymmetric Standard Model having just three generations particles, via flavour $SU(5)$. show that this same arises from simple postulate self-consistence composites these scalars. The model looks only colour and electric charge, it pays cost additional chiral $+4/3$ quark per generation.

10.48550/arxiv.2407.05397 preprint EN arXiv (Cornell University) 2024-07-07

We propose an interpretation for the adjoint representation of SO(32) group to classify scalars a generic Supersymmetric Standard Model having just three generations particles, via flavour SU (5).We show that this same arises from simple postulate self-consistence composites these scalars.The model looks only colour and electric charge, it pays cost additional chiral +4/3 quark per generation.

10.2139/ssrn.4887525 preprint EN 2024-01-01

We explore the concept of areal speed concerning minimal length scales associated with Planck units. In gravitational systems, orbital radius measured in units becomes independent Newton's constant; it is just a multiple Compton wavelength \(M\). Reversing argument leads to an emergent understanding Newtonian gravity. also note that general relativity correction compensated by Generalized Uncertainty Principle and we highlight critical role spatial dimensionality.

10.32388/q7sktz preprint EN cc-by 2024-10-14

Abstract We propose an interpretation for the adjoint representation of SO (32) group to classify scalars a generic Supersymmetric Standard Model having just three generations particles, via flavour SU (5). show that this same arises from simple postulate self-consistence composites these scalars. The model looks only colour and electric charge, it pays cost additional chiral $$+4/3$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>4</mml:mn>...

10.1140/epjc/s10052-024-13368-3 article EN cc-by The European Physical Journal C 2024-10-15

10.2139/ssrn.4967771 preprint EN 2024-01-01
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