Logical Linked Data Compression

Linked data has experienced accelerated growth in recent years. With the continuing proliferation of structured data, demand for RDF compression is becoming increasingly important. In this study, we introduce a novel lossless compression technique for RDF datasets, called Rule Based Compression (RB Compression) that compresses datasets by generating a set of new logical rules from the dataset and removing triples that can be inferred from these rules. Unlike other compression techniques, our approach not only takes advantage of syntactic verbosity and data redundancy but also utilizes semantic associations present in the RDF graph. Depending on the nature of the dataset, our system is able to prune more than 50% of the original triples without affecting data integrity

Contents of trace elements and sulphur in the leaves of deciduous trees along the roads of Zonguldak, Turkey

In this study, 16 trace elements (Al, B, Ba, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Ni, Pb, Sr, V, Zn) and S were found in unwashed leaves of several deciduous tree species [Alnus glutinosa (L.) Gaertner, Platanus orientalis L., Salix babylonica L.]. Samples were collected from 28 points distributed over 5 sites representing different traffic intensities in the city of Zonguldak. The relationships of sampling sites were determined using the UPGMA method. According to the results of analyses, the trace element and S concentrations in the observed tree species were ordered as follows: S>Mg>Fe>Sr>Zn> B>Ba>Al>Mn>Cu>Pb> Ni> V>Cr>Li>Co>Cd in Alnus glutinosa; S>Mg>Fe>Sr>Zn> Mn> Ba >Al>B>Cu>Pb> Cr>V>Li>Ni>Co>Cd in Platanus orientalis; S>Fe>Mg>Zn> Sr>Al>Ba>B>Mn>Cu> V>Pb>Ni>Li>Cr>Cd>Co in Salix babylonica. Significant positive correlations existed between the amount of heavy metals (r=0.81-1.00). The results are discussed in the context of prior studies. © by PSP

Foreign Body In The Main Pulmoary Artery An Unusual Complication Of Pudenz-Shunt

Scopu

Holocene coastal change in the ancient harbor of Yenikapi-L·stanbul and its impact on cultural history

An extensive rescue excavation has been conducted in the ancient harbor of L·stanbul (Yenikapi) by the Sea of Marmara, revealing a depositional sequence displaying clear evidence of transgression and coastal progradation during the Holocene. The basal layer of this sequence lies at 6. m below the present sea level and contains remains of a Neolithic settlement known to have been present in the area, indicating that the sea level at ~. 8-9. cal ka BP was lower than 6. m below present. Sea level advanced to its maximum at ~. 6.8-7. cal ka BP, drowning Lykos Stream and forming an inlet at its mouth. After ~. 3. cal ka BP, coastal progradation became evident. Subsequent construction of the Byzantine Harbor (Theodosius; 4th century AD) created a restricted small basin and accumulation of fine-grained sediments. The sedimentation rate was increased due to coastal progradation and anthropogenic factors during the deposition of coarse-grained sediments at the upper parts of the sequence (7th-9th centuries AD). The harbor was probably abandoned after the 11th century AD by filling up with Lykos Stream detritus and continued seaward migration of the coastline. © 2011 University of Washington.ÖNAP-472We are grateful to Directors Dr. İsmail Karamut, Zeynep Kızıltan, chief archeologists Metin Gökçay and Yaşar Anılır, and site archeologist Sırrı Çömlekçi for their valuable and kind help at the field study. We thank Dr. Baki Yokeş for identifying mollusk samples for radiocarbon analysis. We are indebted to Prof. Peter Kuniholm and Dr. Charlotte Pearson for improving the English language of the manuscript. We acknowledge two anonymous reviewers and Senior Editor Dr. D. B. Booth for their constructive comments on the earlier version of the manuscript. The present work was supported by the Research Fund of İstanbul University , project number ÖNAP-472

Earliest Date for Milk Use in the Near East and Southeastern Europe Linked to Cattle Herding

Near Eastern Archaeolog