[HTML][HTML] An exploration of the mathematical structure and behavioural biases of 21st century financial crises

N James, M Menzies - Physica A: Statistical Mechanics and its Applications, 2023 - Elsevier
In this paper we contrast the dynamics of the 2022 Ukraine invasion financial crisis with
notable financial crises of the 21st century—the dot-com bubble, global financial crisis and …

Impact of the COVID-19 Pandemic on Births, Vaginal Deliveries, Cesarian Sections, and Maternal Mortality in a Brazilian Metropolitan Area: A Time-Series Cohort …

DP Ferreira, CV Bolognani, LA Santana… - … Journal of Women's …, 2023 - Taylor & Francis
Purpose The COVID-19 pandemic posed a worldwide challenge, leading to radical changes
in healthcare. The primary objective of the study was to assess the impact of the COVID-19 …

Impact of the COVID-19 Pandemic on Elective and Emergency Surgeries, and Postoperative Mortality in a Brazilian Metropolitan Area: A Time-Series Cohort Study

DP Ferreira, CV Bolognani, LA Santana… - … and Healthcare Policy, 2024 - Taylor & Francis
Purpose The COVID-19 pandemic posed a worldwide challenge, leading to radical changes
in surgical services. The primary objective of the study was to assess the impact of COVID …

Nonlinear effects of resource allocation delay on epidemic spreading in complex networks

X Chen, X Yang, R Wang, A Li, X Yang, S Cai… - … Journal of Nonlinear …, 2025 - pubs.aip.org
The impact of resource allocation on the dynamics of epidemic spreading is an important
topic. In real-life scenarios, individuals usually prioritize their own safety, and this self …

Portfolio diversification with varying investor abilities

N James, M Menzies - Europhysics Letters, 2024 - iopscience.iop.org
We introduce new mathematical methods to study the optimal portfolio size of investment
portfolios over time, considering investors with varying skill levels. First, we explore the …

[HTML][HTML] The causal relationship between gut microbiota and COVID-19: A two-sample Mendelian randomization analysis

S Tian, W Huang - Medicine, 2024 - journals.lww.com
Recent studies have shown that gut microbiota is associated with coronavirus disease 2019
(COVID-19). However, the causal impact of the gut microbiota on COVID-19 remains …

Detecting imbalanced financial markets through time-varying optimization and nonlinear functionals

N James, M Menzies - arXiv preprint arXiv:2412.00468, 2024 - arxiv.org
This paper studies the time-varying structure of the equity market with respect to market
capitalization. First, we analyze the distribution of the 100 largest companies' market …

Nonlinear shifts and dislocations in financial market structure and composition

N James, M Menzies - arXiv preprint arXiv:2403.15163, 2024 - arxiv.org
This paper develops new mathematical techniques to identify temporal shifts among a
collection of US equities partitioned into a new and more detailed set of market sectors …

[HTML][HTML] Collective infectivity of the pandemic over time and association with vaccine coverage and economic development

N James, M Menzies - Chaos, Solitons & Fractals, 2023 - Elsevier
This paper uses new and existing methods to study collective trends across countries
throughout the pandemic, with a focus on the multivariate time series of reproduction …

[PDF][PDF] Padrões de Impacto e Produtividade em Carreiras Científicas

AS Sunahara - ansesu.github.io
Nesta tese, exploramos diversos tópicos da disciplina de ciência da ciência (science of
science) usando a Plataforma Lattes como fonte primária de dados. Na primeira parte …