scholarly journals Influence of human population movements on urban climate of Beijing during the Chinese New Year holiday

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Jingyong Zhang ◽  
Lingyun Wu
Keyword(s):  
Human Population ◽  
Urban Climate ◽  
Population Movements ◽  
Chinese New Year Holiday

scholarly journals Mathematical modelling for malaria under resistance and population movement

2020 ◽  
Vol 38 (2) ◽  
pp. 133-163
Author(s):  
Cristhian Montoya ◽  
Jhoana P. Romero Leiton
Keyword(s):  
Human Population ◽  
Control Strategies ◽  
Basic Reproductive Number ◽  
Reproductive Number ◽  
Transmission Dynamic ◽  
Equilibrium Solutions ◽  
Population Movements ◽  
Existence And Stability ◽  
Theoretical Results ◽  
Disease Free

In this work, two mathematical models for malaria under resistance are presented. More precisely, the first model shows the interaction between humans and mosquitoes inside a patch under infection of malaria when the human population is resistant to antimalarial drug and mosquitoes population is resistant to insecticides. For the second model, human–mosquitoes population movements in two patches is analyzed under the same malaria transmission dynamic established in a patch. For a single patch, existence and stability conditions for the equilibrium solutions in terms of the local basic reproductive number are developed. These results reveal the existence of a forward bifurcation and the global stability of disease–free equilibrium. In the case of two patches, a theoretical and numerical framework on sensitivity analysis of parameters is presented. After that, the use of antimalarial drugs and insecticides are incorporated as control strategies and an optimal control problem is formulated. Numerical experiments are carried out in both models to show the feasibility of our theoretical results.

scholarly journals Deciphering Past Human Population Movements in Oceania: Provably Optimal Trees of 127 mtDNA Genomes

2006 ◽  
Vol 23 (10) ◽  
pp. 1966-1975 ◽  
Author(s):  
Melanie J. Pierson ◽  
Rosa Martinez-Arias ◽  
Barbara R. Holland ◽  
Neil J. Gemmell ◽  
Matthew E. Hurles ◽  
...  
Keyword(s):  
Human Population ◽  
Population Movements ◽  
Optimal Trees

scholarly journals Vegetation fragment influence over urban climate

2017 ◽  
Vol 2 (1) ◽  
pp. 72-86
Author(s):  
Tiago Henrique De Oliveira ◽  
Rejane Magalhães de Mendonça Pimentel ◽  
Josiclêda Domiciano Galvíncio
Keyword(s):  
Air Temperature ◽  
Environmental Quality ◽  
Human Population ◽  
Urban Climate ◽  
Forest Fragments ◽  
Area Index ◽  
Water Index ◽  
Erosion Processes ◽  
Normalized Difference Water Index ◽  
Big City

Vegetated areas are important to provide environmental quality for the human population that lives in the neighborhood and to avoid natural disasters, such as erosion processes. The monitoring of forest fragments and green areas in the urban environment is important to the efficient management of the vegetation. This study aimed to identify the influence of the vegetation over the urban climate. The Leaf Area Index (LAI), Normalized Difference Water Index (NDWI), and surface temperature were considered to be used to monitoring the air temperature. Different vegetation coverture in distinct areas of a big city, as Recife-PE-Brazil, is responsible for the environmental quality conditions, mainly those related to the air temperature and humidity, providing comfortable conditions for the human population. It is indispensable the monitoring of these vegetated areas to optimize the quality of life in big cities.

Human Population Movements

2015 ◽  
pp. 219-233
Author(s):  
Oscar Lao ◽  
Manfred Kayser
Keyword(s):  
Human Population ◽  
Population Movements

scholarly journals The Stone Age Plague: 1000 years of Persistence in Eurasia

2016 ◽  
Author(s):  
Aida Andrades Valtueña ◽  
Alissa Mittnik ◽  
Felix M. Key ◽  
Wolfgang Haak ◽  
Raili Allmäe ◽  
...  
Keyword(s):  
Bronze Age ◽  
Human Population ◽  
Human Mobility ◽  
Molecular Signatures ◽  
Stone Age ◽  
Late Neolithic ◽  
Population Movements ◽  
Central Eurasia ◽  
Human Genomic ◽  
The Bronze Age

AbstractMolecular signatures of Yersinia pestis were recently identified in prehistoric Eurasian individuals, thus suggesting Y. pestis caused some form of disease in humans prior to the first historically documented pandemic. Here, we present six new Y. pestis genomes spanning from the European Late Neolithic to the Bronze Age (LNBA) dating from 4,800 to 3,700 BP. We show that all currently investigated LNBA strains form a single genetic clade in the Y. pestis phylogeny that appears to be extinct. Interpreting our data within the context of recent ancient human genomic evidence, which suggests an increase in human mobility during the LNBA, we propose a possible scenario for the spread of Y. pestis during the LNBA: Y. pestis may have entered Europe from Central Eurasia during an expansion of steppe people, persisted within Europe until the mid Bronze Age, and moved back towards Central Eurasia in parallel with subsequent human population movements.

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