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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/6

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    PublicationOpen Access
    Feature and information extraction for regions of Southeast Europe from Corona satellite images acquired in 1968
    (Society of Photo-optical Instrumentation Engineers (SPIE), 2020) Stratoulias, Dimitris; Department of History; Kabadayı, Mustafa Erdem; Faculty Member; Department of History; College of Social Sciences and Humanities; 33267
    The Corona spy programme was a series of reconnaissance satellites which delivered more than 860000 images between 1960 and 1972. Since 1995, the data are declassified and a large historic earth observation archive is made accessible to the scientific community. Despite the large volume of information and the high spatial resolution of the satellite imagery, little has been done in the last 25 years in the context of image processing of this data source, a fact which perhaps can be attributed to the technical difficulties of these primitive images such as the lack of metadata, intense spatial and radiometric distortions, low Signal-to-Noise Ratio (SNR) and a single panchromatic band. Hence, the photogrammetric challenges to extract useful information are paramount. In this study, we present recent developments arising from our efforts to map settlements and agricultural parcels over the Plovdiv region, Bulgaria from a Corona image acquired in 1968. We, overall, present initial findings from the integration of earth observation into the ERC-StG project UrbanOccupationsOETR and evaluate the usability of such primitive images in feature extraction. We compare the areas corresponding to settlements and correlate them with concurrent population census. Based on the findings, we suggest that settlements and agricultural parcels can be mapped from a Corona KH-4B image with fine radiometric quality.
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    PublicationOpen Access
    Using threshold co-integration to estimate asymmetric price transmission in the Turkish milk market
    (Bononia University Press, 2021) Bor, Özgür; Department of Economics; Alpanda, Berna Tuncay; Teaching Faculty; Department of Economics; College of Administrative Sciences and Economics; 258769
    We investigate the price dynamics between retail milk price and raw milk price in the Turkish fluid milk market. The study uses monthly fluid milk prices for 14 years between January 2003 and December 2016. We analyze the price adjustment in the fluid milk market through an asymmetric error correction model with threshold co-integration. We find that the transmission between the two prices has been asymmetric in both the long term and short term period. Differences between the farm milk prices and retail milk prices may exist due to marketing costs across the supply chain and pricing policies associated with the market structure. Results of the long-run analysis indicate a significant market power in the fluid milk market. Therefore, in this asymmetric case, the deviations are likely to be the reason for the market power of the processors/retailers and the reason for the oligopolistic market structure in the sector.