scholarly journals Spatial Interaction in Local Expenditures Among Italian Municipalities: Evidence from Italy 2001-2011

2016 ◽  
Author(s):  
Massimiliano Ferraresi ◽  
Giuseppe Migali ◽  
Leonzio Rizzo
Keyword(s):  
Spatial Interaction ◽  
Local Expenditures

scholarly journals Spatiotemporal tracing of pandemic spread from infection data

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Satyaki Roy ◽  
Preetom Biswas ◽  
Preetam Ghosh
Keyword(s):  
New York ◽  
Network Inference ◽  
Spatial Interaction ◽  
Time Windows ◽  
New York State ◽  
Mitigation Measures ◽  
Contact Tracing ◽  
Long Distance ◽  
Spatiotemporal Models ◽  
Spread Of Infection

AbstractCOVID-19, a global pandemic caused by the Severe Acute Respiratory Syndrome Coronavirus 2 virus, has claimed millions of lives worldwide. Amid soaring contagion due to newer strains of the virus, it is imperative to design dynamic, spatiotemporal models to contain the spread of infection during future outbreaks of the same or variants of the virus. The reliance on existing prediction and contact tracing approaches on prior knowledge of inter- or intra-zone mobility renders them impracticable. We present a spatiotemporal approach that employs a network inference approach with sliding time windows solely on the date and number of daily infection numbers of zones within a geographical region to generate temporal networks capturing the influence of each zone on another. It helps analyze the spatial interaction among the hotspot or spreader zones and highly affected zones based on the flow of network contagion traffic. We apply the proposed approach to the daily infection counts of New York State as well as the states of USA to show that it effectively measures the phase shifts in the pandemic timeline. It identifies the spreaders and affected zones at different time points and helps infer the trajectory of the pandemic spread across the country. A small set of zones periodically exhibit a very high outflow of contagion traffic over time, suggesting that they act as the key spreaders of infection. Moreover, the strong influence between the majority of non-neighbor regions suggests that the overall spread of infection is a result of the unavoidable long-distance trips by a large number of people as opposed to the shorter trips at a county level, thereby informing future mitigation measures and public policies.

On the Relationship between Alonso's Theory of Movement and Wilson's Family of Spatial-Interaction Models

1981 ◽  
Vol 13 (2) ◽  
pp. 217-224 ◽  
Author(s):  
J Ledent
Keyword(s):  
Input Data ◽  
Spatial Interaction ◽  
System Of Equations ◽  
Interaction Models ◽  
Spatial Interaction Models ◽  
Standard Family ◽  
Original Contribution ◽  
Standard Models ◽  
The Relationship

This paper compares the system of equations underlying Alonso's theory of movement with that of Wilson's standard family of spatial-interaction models. It is shown that the Alonso model is equivalent to one of Wilson's four standard models depending on the assumption at the outset about which of the total outflows and/or inflows are known. This result turns out to supersede earlier findings—inconsistent only in appearance—which were derived independently by Wilson and Ledent. In addition to this, an original contribution of this paper—obtained as a byproduct of the process leading to the aforementioned result—is to provide an exact methodology permitting one to solve the Alonso model for each possible choice of the input data.

METHODS FOR CURBING LOCAL EXPENDITURES

1939 ◽  
Vol 24 (8) ◽  
pp. 227-230
Author(s):  
WILLIAM H. HACKETT
Keyword(s):  
Local Expenditures

scholarly journals Amelogenin-Ameloblastin Spatial Interaction around Maturing Enamel Rods

2016 ◽  
Vol 95 (9) ◽  
pp. 1042-1048 ◽  
Author(s):  
P. Mazumder ◽  
S. Prajapati ◽  
R. Bapat ◽  
J. Moradian-Oldak
Keyword(s):  
Spatial Interaction

Functional Regionalization of Spatial Interaction Data: A Comment

1981 ◽  
Vol 13 (5) ◽  
pp. 645-646 ◽  
Author(s):  
A Findlay ◽  
P B Slater
Keyword(s):  
Spatial Interaction ◽  
Interaction Data ◽  
Functional Regionalization ◽  
Independent Effects

A recent paper by Masser and Scheurwater (1980) favoured the adoption of the intramax procedure for functional regionalization, without satisfactorily investigating the independent effects of the approach of the procedure to standardization and to clustering. From an examination of these phases of the intramax procedure it is shown that the superiority of Masser and Scheurwater's approach is based on doubtful criteria.

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