A revised annotated checklist of louse flies (Diptera, Hippoboscidae) from Slovakia

The list of all known locality and host records from the literature on louse flies from Slovakia are summarized, with the addition of new collection data. New locality data are provided for five species. Three species are added to the Slovakian list: Icosta minor (Bigot in Thomson, 1858), which was erroneously cited for Moravia instead of Slovakia in the previous checklist, and Ornithophila metallica (Schiner, 1864) and Ornithomya chloropus (Bergroth, 1901), which were overlooked from the last checklist. As a result, the louse fly fauna of Slovakia increases to 19 species: 12 autochtonous species and seven rare, non-native species only occasionally imported to Slovakia or migrating to the country with their hosts. This is by far the largest regional fauna of Hippoboscidae in Central Europe, and matches the richest southern European faunas. In total, 78 host-parasite associations concerning 46 bird-host species from eight orders and nine species of mammals, including humans, have been found from a literature review in Slovakia. Two host-parasite associations are reported from Slovakia for the first time: Ornithomya avicularia (Linnaeus, 1758) on Prunella modularis (Linnaeus, 1758) (Aves: Prunellidae) and Lipoptena fortisetosa Maa, 1965 on Homo sapiens Linnaeus, 1758 (Mammalia: Hominidae)

Transmission delay stabilization using commercial pluggable small form factor transceiver based on V-cavity laser

In this paper, we introduce and verify direct wavelength tuning of V-cavity laser based transceiver as a method for optical stabilization of the end-to-end delay of an optical fiber link. Other mostly deployed methods of optical stabilization are briefly overviewed together with particular lasers available in commercial transceivers. Fine tuning procedure for chosen V-cavity laser based transceiver is proposed, and such process is verified, increasing finesse at least 13 times (40 times on selected intervals).</p

Joint stable optical frequency and precise time transfer over 406 km of shared fiber lines - study

We present a preliminary study of bidirectional ultra-stable optical frequency and precise time transmission over 406 km long path in the telecom-grade fiber optic infrastructure of dense wavelength division multiplexing. The main challenge in this application is the need of bidirectional amplification to compensate for signal loss. Directional non-reciprocities of the time transfer are evaluated together with their uncertainties. Solutions are proposed to significantly limit the final uncertainty