Evaluating the impacts of relaxation and mutation in the SARS-CoV-2 on the COVID-19 epidemic based on a mathematical model: a case study of São Paulo State (Brazil)

In São Paulo State, mainly in rural areas, the utilization of wooden poles is observed for different purposes. In this context, wood in contact with the ground presents faster deterioration, which is generally associated to environmental factors and, especially to the presence of fungi and insects. With the use of mathematical models, the useful life of wooden structures can be predicted by obtaining "climatic indexes" to indicate, comparatively among the areas studied, which have more or less tendency to fungi and insects attacks. In this work, by using climatological data of several cities at São Paulo State, a simplified mathematical model was obtained to measure the aggressiveness of the wood in contact with the soil.

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Air quality and health impact assessment of a truckers' strike in Sao Paulo state, Brazil: A case study

Urban Climate ◽

10.1016/j.uclim.2020.100687 ◽

2020 ◽

Vol 34 ◽

pp. 100687 ◽

Cited By ~ 1

Author(s):

Daniela Debone ◽

Luciana Ferreira Leite Leirião ◽

Simone Georges El Khouri Miraglia

Keyword(s):

Air Quality ◽

Impact Assessment ◽

Health Impact Assessment ◽

Health Impact ◽

Sao Paulo ◽

São Paulo ◽

Paulo State ◽

São Paulo State

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Lithic Landscapes and Early Inhabitants in Southeastern Brazil: First Perspectives from a Case Study in Dourado, São Paulo State

PaleoAmerica ◽

10.1080/20555563.2018.1564522 ◽

2019 ◽

Vol 5 (1) ◽

pp. 44-61 ◽

Cited By ~ 3

Author(s):

Nicolás Batalla ◽

Letícia C. Correa ◽

Astolfo G. M. Araujo

Keyword(s):

Sao Paulo ◽

Southeastern Brazil ◽

São Paulo ◽

Paulo State ◽

São Paulo State

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Evaluating the trade-off between transmissibility and virulence of SARS-CoV-2 by mathematical modeling

10.1101/2021.02.27.21252592 ◽

2021 ◽

Cited By ~ 1

Author(s):

Hyun Mo Yang ◽

Luis Pedro Lombardi Junior ◽

Ariana Campos Yang

Keyword(s):

Mathematical Model ◽

Reproduction Number ◽

Sao Paulo ◽

Model Parameters ◽

São Paulo ◽

Paulo State ◽

The World ◽

Age Dependent ◽

São Paulo State ◽

Asymptomatic Individuals

AbstractBackgroundAt the beginning of 2020, SARS-CoV-2 spread to all continents, and since then, mutations have appeared in different regions of the world. The appearance of more virulent mutations leads to asseverate that they are also more transmissible. We analyzed the lower and higher virulent SARS-CoV-2 epidemics to establish a relationship between transmissibility and virulence based on a mathematical model.MethodsA compartmental mathematical model based on the CoViD-19 natural history encompassing the age-dependent fatality was applied to evaluate the SARS-CoV-2 transmissibility and virulence. The transmissibility was measured by the basic reproduction number R0 and the virulence by the proportion of asymptomatic individuals. The model parameters were fitted considering the observed data from São Paulo State.ResultsThe numbers of severe CoViD-19 and deaths are three times higher, but R0 is 25% lower in more virulent SARS-CoV-2 transmission than in a less virulent one. However, the number of more virulent SARS-CoV-2 transmitting individuals is 25% lower, mainly due to symptomatic individuals’ isolation, explaining the increased transmission in lower virulence.ConclusionsThe quarantine study in São Paulo State showed that the more virulent SARS-CoV-2 resulted in a higher number of fatalities but less transmissible than the less virulent one. One possible explanation for the number of deaths surpassing that predicted by the low virulent SARS-CoV-2 infection could be the transmission of more virulent variant(s).

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Assessment of photovoltaic generation, supply, and sustainability: a case study of municipalities in São Paulo state

Sustentabilidade em Debate ◽

10.18472/sustdeb.v12n2.2021.37015 ◽

2021 ◽

Vol 12 (2) ◽

pp. 51-78

Author(s):

Nilo Amaral Martin ◽

Antonio Cesar Germano Martins

Keyword(s):

Sao Paulo ◽

Generation Model ◽

São Paulo ◽

Photovoltaic Generation ◽

Paulo State ◽

Decentralized Generation ◽

Short Period ◽

São Paulo State ◽

Environmental Outcome

Energy consumption has been increasing together with population growth and the consequences for energy production widely generate discussions under the aspect of environmental outcome and supply reliability and quality. This paper proposes a methodology that allows the estimation of the potential for cities to be more independent in terms of centralized generation and distribution of electricity considering photovoltaic sources. Sustainability and environmental performance are also discussed. The methodology aims to assess some municipalities in the São Paulo state. The results showed high potential for photovoltaic supply in those municipalities under the considered conditions indicating the possibility for structuring a decentralized generation model where cities would be more independent in electricity supply. Implementing the required photovoltaic systems would return the energy consumed during their life cycle in a relatively short period compared to their expected lifetime.

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