Lehtonen, Joel

Joel Lehtonen f. 27.11.1881 i Säminge d. 20.11.1934 i Helsingfors Under sin litterära bana avancerade Joel Lehtonen från en nyromantisk, nietzscheanskt färgad lidelse, mot en poetisk-realistisk folklivsskildring. Lehtonens tidiga litterära verk utspelar sig i finländsk forntid och skildrar upproriskheten hos stolta och avvikande individer som reflekterar över sitt ursprung. Lehtonens realistiska period når sin kulmen med den sk. Putkinotko-serien, som består av romanen Kerran kesällä (sv. En gång på sommaren) från 1917, novellsamlingen Kuolleet omenapuut (sv. De döda äppelträden) från 1918 samt endagsromanen Putkinotko, från 1919-1920, som kan ses som författarens mest centrala verk. I 1920- och 1930-talsproduktionen dyker satiriska och groteska drag upp. Lehtonens mest betydande diktsamling är Hyvästijättö lintukodolle (sv. Avsked till Lintukoto) som utgavs år 1934. http://www.blf.fi/artikel.php?id=4598 http://www.kansallisbiografia.fi/kb/artikkeli/4598/

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1/2014 on lehden EU-erikoisnumero.

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Kirjallisuusarvostelu

Evaluation of the GPS Accuracy of Tablets

Augmented Reality (AR) applications often require knowledge of the user’s position in some global coordinate system in order to draw the augmented content to its correct position on the screen. The most common method for coarse positioning is the Global Positioning System (GPS). One of the advantages of GPS is that GPS receivers can be found in almost every modern mobile device. This research was conducted in order to determine the accuracies of different GPS receivers. The tests included seven consumer-grade tablets, three external GPS modules and one professional-grade GPS receiver. All of the devices were tested with both static and mobile measurements. It was concluded that even the cheaper external GPS receivers were notably more accurate than the GPS receivers of the tested tablets. The absolute accuracy of the tablets is difficult to determine from the test results, since the results vary by a large margin between different measurements. The accuracy of the tested tablets in static measurements were between 0.30 meters and 13.75 meters.

Transfer of MPEG-2 Transport Stream over MPLS

This study examines how MPEG-2 Transport Stream, used in DVB-T video transmission, can be reliably and efficiently transferred to remote locations over an MPLS network. All the relevant technologies used in this scenario are also discussed in the study. This study was done for Digita Oy, which is a major radio and television content distributor in Finland. The theoretical part of the study begins with the introduction to MPLS technology and continues with explanation of IP Multicast and its components. The fourth section discusses MPEG-2 and the formation and content of MPEG-2 Transport Stream. These technologies were studied in relevant literature and RFC documentation. After the theoretical part of the study, the test setup and the test cases are presented. The results of the test cases, and the conclusions that can be drawn based on them, are discussed in the last section of the study. The tests showed that it is possible to transfer digital video quite reliably over an MPLS network using IP Multicast. By configuring the equipment correctly, the recovery time of the network in case of a failure can be shortened remarkably. Also, the unwanted effect of other traffic on the critical video traffic can be eliminated by defining the Quality of Service parameters correctly. There are, however, some issues that need to be tested further before this setup can be used in broadcast networks. Reliable operation of IP Multicast and proper error correction are the main subjects for future testing.