Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regional airports in Greece, their characteristics and their importance
  for the local economic development   Technological developments worldwide are contributing to the improvement of
transport infrastructures and they are helping to reduce the overall transport
costs. At the same time, such developments along with the reduction in
transport costs are affecting the spatial interdependence between the regions
and countries, a fact inducing significant effects on their economies and, in
general, on their growth-rates. A specific class of transport infrastructures
contributing significantly to overcoming the spatial constraints is the
airtransport infrastructures. Nowadays, the importance of air-transport
infrastructures in the economic development is determinative, especially for
the geographically isolated regions, such as for the island regions of Greece.
Within this context, this paper studies the Greek airports and particularly the
evolution of their overall transportation imprint, their geographical
distribution, and the volume of the transport activity of each airport. Also,
it discusses, in a broad context, the seasonality of the Greek airport
activity, the importance of the airports for the local and regional
development, and it formulates general conclusions.

19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph