scholarly journals Spatio-temporal estimation of basic and effective reproduction number of COVID-19 and post-lockdown transmissibility in Bangladesh

2021 ◽  
Author(s):  
Al-Ekram Elahee Hridoy ◽  
Imrul Hasan Tipo ◽  
Md. Shamsudduha Sami ◽  
Md. Ripon Babu ◽  
Md. Sayem Ahmed ◽  
...  
Keyword(s):  
Reproduction Number ◽  
Temporal Estimation ◽  
Spatio Temporal

scholarly journals SPATIO-TEMPORAL ESTIMATION OF INTEGRATED WATER VAPOUR OVER THE MALAYSIAN PENINSULA DURING MONSOON SEASON

2017 ◽  
Vol XLII-4/W5 ◽  
pp. 165-175
Author(s):  
S. Salihin ◽  
T. A. Musa ◽  
Z. Mohd Radzi
Keyword(s):  
Water Vapour ◽  
Monsoon Season ◽  
Temporal Distribution ◽  
Southwest Monsoon ◽  
Northeast Monsoon ◽  
Path Delay ◽  
Zenith Path Delay ◽  
Temporal Estimation ◽  
Integrated Water Vapour ◽  
Spatio Temporal

This paper provides the precise information on spatial-temporal distribution of water vapour that was retrieved from Zenith Path Delay (ZPD) which was estimated by Global Positioning System (GPS) processing over the Malaysian Peninsular. A time series analysis of these ZPD and Integrated Water Vapor (IWV) values was done to capture the characteristic on their seasonal variation during monsoon seasons. This study was found that the pattern and distribution of atmospheric water vapour over Malaysian Peninsular in whole four years periods were influenced by two inter-monsoon and two monsoon seasons which are First Inter-monsoon, Second Inter-monsoon, Southwest monsoon and Northeast monsoon.

scholarly journals Tracking progress towards malaria elimination in China: estimates of reproduction numbers and their spatiotemporal variation

2019 ◽  
Author(s):  
Isobel Routledge ◽  
Shengjie Lai ◽  
Katherine E Battle ◽  
Azra C Ghani ◽  
Manuel Gomez-Rodriguez ◽  
...  
Keyword(s):  
Yunnan Province ◽  
Reproduction Number ◽  
Individual Level ◽  
Reproduction Numbers ◽  
Imported Cases ◽  
Geostatistical Models ◽  
Sources Of Infection ◽  
Spatio Temporal ◽  
The Relationship ◽  
Local Transmission

AbstractChina reported zero locally-acquired malaria cases in 2017 and 2018. Understanding the spatio-temporal pattern underlying this decline, especially the relationship between locally-acquired and imported cases, can inform efforts to maintain elimination and prevent re-emergence. This is particularly pertinent in Yunnan province, where the potential for local transmission is highest. Using a geo-located individual-level dataset of cases recorded in Yunnan province between 2011 and 2016, we jointly estimate the case reproduction number, Rc, and the number of unobserved sources of infection. We use these estimates within spatio-temporal geostatistical models to map how transmission varied over time and space, estimate the timeline to elimination and the risk of resurgence. Our estimates suggest that, maintaining current intervention efforts, Yunnan is unlikely to experience sustained local transmission up to 2020. However, even with a mean Rc of 0.005 projected for the year 2019, locally-acquired cases are possible due to high levels of importation.

Prevalence of Salmonella in flocks housed in enriched cages

2014 ◽  
Vol 143 (6) ◽  
pp. 1194-1207 ◽  
Author(s):  
P. ZONGO ◽  
A. DUCROT ◽  
J.-B. BURIE ◽  
C. BEAUMONT
Keyword(s):  
Temporal Evolution ◽  
Deterministic Model ◽  
Reproduction Number ◽  
Breeding Systems ◽  
Foodborne Disease ◽  
Or Groups ◽  
Cage Size ◽  
Spatio Temporal ◽  
Speed Of Propagation ◽  
The Basic Reproduction Number

SUMMARYSalmonellosis is a foodborne disease of humans and animals caused by infection with Salmonella. The aim of this paper is to improve a deterministic model (DM) and an individual-based model (IBM) with reference to Salmonella propagation in flocks of laying hens taking into account variations in hens housed in the same cage and to compare both models. The spatio-temporal evolution, the basic reproduction number, R0, and the speed of wave propagation were computed for both models. While in most cases the DM allows summary of all the features of the model in the formula for computation of R0, slight differences between individuals or groups may be observed with the IBM that could not be expected from the DM, especially when initial environmental contamination is very low and some cages may get rid of bacteria. Both models suggest that the cage size plays a role on the risk and speed of propagation of the bacteria, which should be considered when designing new breeding systems.

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