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pro vyhledávání: '"Vázquez, Alexei"'
Autor:
Vazquez, Alexei
In 1969 Bromilow observed that the time $T$ to execute a construction project follows a power law scaling with the project cost $C$, $T\sim C^B$ [Bromilow 1969]. While the Bromilow's time-cost model has been extensively tested using data for differen
Externí odkaz:
http://arxiv.org/abs/2409.00110
Autor:
Vazquez, Alexei
The utilization of glycolysis in aerobic conditions have been a subject of debate for more than a century. A hypothesis supported by previous data is that glycolysis has a higher rate of ATP production per protein mass and per occupied volume than ox
Externí odkaz:
http://arxiv.org/abs/2403.14741
Autor:
Vazquez, Alexei
Publikováno v:
Eur Phys J B 97:44 (2024)
A project schedule contains a network of activities, the activity durations, the early and late finish dates for each activity, and the associated total float or slack times, the difference between the late and early dates. Here I show that the distr
Externí odkaz:
http://arxiv.org/abs/2312.12906
Autor:
Vazquez, Alexei
Publikováno v:
Chaos, Solitons & Fractals 180, 114528 (2024)
Project networks are characterized by power law degree distributions, a property that is known to promote spreading. In contrast, the longest path length of project networks scales algebraically with the network size, which improves the impact of ran
Externí odkaz:
http://arxiv.org/abs/2311.02959
Metabolic networks are probably among the most challenging and important biological networks. Their study provides insight into how biological pathways work and how robust a specific organism is against an environment or therapy. Here we propose a di
Externí odkaz:
http://arxiv.org/abs/2310.03623
Autor:
Vazquez, Alexei
Percolation theory investigates systems of interconnected units, their resilience to damage and their propensity to propagation. For random networks we can solve the percolation problems analytically using the generating function formalism. Yet, with
Externí odkaz:
http://arxiv.org/abs/2308.00987
Publikováno v:
Physica A 637, 129570 (2024)
Delays in activities completion drive human projects to schedule and cost overruns. It is believed activity delays are the consequence of multiple idiosyncrasies without specific patterns or rules. Here we show that is not the case. Using data for 18
Externí odkaz:
http://arxiv.org/abs/2304.10304
Autor:
Vazquez, Alexei
The shape of empirical distributions with heavy tails is a recurrent matter of debate. There are claims of a power laws and the associated scale invariance. There are plenty of challengers as well, the lognormal and stretched exponential among others
Externí odkaz:
http://arxiv.org/abs/2211.14069
Autor:
Vazquez, Alexei
Publikováno v:
Phys. Rev. E 107, 024316 (2023)
Providing an abstract representation of natural and human complex structures is a challenging problem. Accounting for the system heterogenous components while allowing for analytical tractability is a difficult balance. Here I introduce complex hyper
Externí odkaz:
http://arxiv.org/abs/2209.07331
Autor:
Vazquez, Alexei
Several systems can be represented by hypergraphs, an extension of graphs with associations between any number of vertices. These natural hypergraphs doe not appear at once. They are generated by some dynamical process of hypergraph evolution. Here I
Externí odkaz:
http://arxiv.org/abs/2208.03103