Stone Age and Early Metal Period Archaeology and Settlement Patterns in the Lake Pyhäjärvi Micro-Region, Karelian Isthmus, Russia

Recent Finnish-Russian research cooperation on the Karelian Isthmus, north-west Russia, has completely changed views on the area’s prehistory. In this paper we describe the methodology and results of archaeological field surveys and test excavations carried out in the so-called Lake Pyhäjärvi micro-region in 2005–2008. In the course of the project’s field studies, the number of Stone Age and Early Metal Period sites in the area increased tenfold, and the exceptional, well-stratified settlement site of Kunnianniemi with nearly three-metredeep archaeological deposits was located. Recent studies provide reference material for the recently studied nearby areas and a working framework for further inquiries related to, for instance, the spatio-temporal changes in the settlement pattern, material culture, subsistence base, socio-cultural structure, and contact networks

Stone Age Research in the Narva–Luga Klint Bay Area in 2005–2014

The Narva–Luga micro-region, situated on the border of Estonia and Russia in north-eastern Europe, has been the target of international and interdisciplinary research conducted annually between 2005 and 2014. During this time, altogether 42 new archaeological sites have been discovered, and many sites have also been excavated – in addition, a large amount of natural scientific data has been collected. All in all, over 60 Stone Age and Bronze Age sites are currently known in this micro-region. The sites date mostly between the late 6th and late 3rd millennia calBC, that is, to the cultural contexts of Narva Ware, Comb Ware, and Corded Ware. In this paper, some of the main results of the archaeological studies made during the last decade are briefly summarised

Archaeological cooperation in the Soviet Union and Russia from the 1950s to the early 2020s at the University of Helsinki

‘East archaeology’, research cooperation in the areas of present-day Russia, has been one part of the research activities of the Department of Archaeology at the University of Helsinki in the post-war era. The first steps were taken as part of the state-controlled Finnish-Soviet scientific cooperation between the 1950s and 1970s, but Glasnost and Perestroika opened up a whole new range of opportunities in the 1980s and 1990s. Initially, the collaboration focused primarily on the Karelian Iron Age, but soon expanded to the other periods of prehistory, the Stone Age and the Early Metal Period. A significant part of the research has been conducted in areas near Finland – the Karelian Isthmus and Ingria, the Karelian Republic, and the Kola Peninsula – but several other parts of Russia have also attracted attention over the years. The purpose of this article is to present the history of these ‘eastern’ studies from the beginning to the early 2020s; cooperation has currently been stopped as a consequence of Russian politics, which culminated in the war in Ukraine in 2022

Comprehensive study on the reinforcement of electrospun PHB scaffolds with composite magnetic Fe3O4–rGO fillers: Structure, physico-mechanical properties, and piezoelectric response

This is a comprehensive study on the reinforcement of electrospun poly(3-hydroxybutyrate) (PHB) scaffolds with a composite filler of magnetite−reduced graphene oxide (Fe3O4−rGO). The composite filler promoted the increase of average fiber diameters and decrease of the degree of crystallinity of hybrid scaffolds. The decrease in the fiber diameter enhanced the ductility and mechanical strength of scaffolds. The surface electric potential of PHB/Fe3O4−rGO composite scaffolds significantly increased with increasing fiber diameter owing to a greater number of polar functional groups. The changes in the microfiber diameter did not have any influence on effective piezoresponses of composite scaffolds. The Fe3O4−rGO filler imparted high saturation magnetization (6.67 ± 0.17 emu/g) to the scaffolds. Thus, magnetic PHB/Fe3O4−rGO composite scaffolds both preserve magnetic properties and provide a piezoresponse, whereas varying the fiber diameter offers control over ductility and surface electric potential

"Flora of Russia" on iNaturalist: a dataset

The "Flora of Russia" project on iNaturalist brought together professional scientists and amateur naturalists from all over the country. Over 10,000 people are involved in the data collection.Within 20 months the participants accumulated over 750,000 photo observations of 6,853 species of the Russian flora. This constitutes the largest dataset of open spatial data on the country’s biodiversity and a leading source of data on the current state of the national flora. About 85% of all project data are available under free licenses (CC0, CC-BY, CC-BY-NC) and can be freely used in scientific, educational and environmental activities

"Flora of Russia" on iNaturalist: a dataset

The "Flora of Russia" project on iNaturalist brought together professional scientists and amateur naturalists from all over the country. Over 10,000 people are involved in the data collection.Within 20 months the participants accumulated over 750,000 photo observations of 6,853 species of the Russian flora. This constitutes the largest dataset of open spatial data on the country’s biodiversity and a leading source of data on the current state of the national flora. About 85% of all project data are available under free licenses (CC0, CC-BY, CC-BY-NC) and can be freely used in scientific, educational and environmental activities

"Flora of Russia" on iNaturalist: a dataset

The "Flora of Russia" project on iNaturalist brought together professional scientists and amateur naturalists from all over the country. Over 10,000 people are involved in the data collection.Within 20 months the participants accumulated over 750,000 photo observations of 6,853 species of the Russian flora. This constitutes the largest dataset of open spatial data on the country’s biodiversity and a leading source of data on the current state of the national flora. About 85% of all project data are available under free licenses (CC0, CC-BY, CC-BY-NC) and can be freely used in scientific, educational and environmental activities

The JUNO experiment Top Tracker

20 pagesInternational audienceThe main task of the Top Tracker detector of the neutrino reactor experiment Jiangmen Underground Neutrino Observatory (JUNO) is to reconstruct and extrapolate atmospheric muon tracks down to the central detector. This muon tracker will help to evaluate the contribution of the cosmogenic background to the signal. The Top Tracker is located above JUNO's water Cherenkov Detector and Central Detector, covering about 60% of the surface above them. The JUNO Top Tracker is constituted by the decommissioned OPERA experiment Target Tracker modules. The technology used consists in walls of two planes of plastic scintillator strips, one per transverse direction. Wavelength shifting fibres collect the light signal emitted by the scintillator strips and guide it to both ends where it is read by multianode photomultiplier tubes. Compared to the OPERA Target Tracker, the JUNO Top Tracker uses new electronics able to cope with the high rate produced by the high rock radioactivity compared to the one in Gran Sasso underground laboratory. This paper will present the new electronics and mechanical structure developed for the Top Tracker of JUNO along with its expected performance based on the current detector simulation

The JUNO experiment Top Tracker

20 pagesInternational audienceThe main task of the Top Tracker detector of the neutrino reactor experiment Jiangmen Underground Neutrino Observatory (JUNO) is to reconstruct and extrapolate atmospheric muon tracks down to the central detector. This muon tracker will help to evaluate the contribution of the cosmogenic background to the signal. The Top Tracker is located above JUNO's water Cherenkov Detector and Central Detector, covering about 60% of the surface above them. The JUNO Top Tracker is constituted by the decommissioned OPERA experiment Target Tracker modules. The technology used consists in walls of two planes of plastic scintillator strips, one per transverse direction. Wavelength shifting fibres collect the light signal emitted by the scintillator strips and guide it to both ends where it is read by multianode photomultiplier tubes. Compared to the OPERA Target Tracker, the JUNO Top Tracker uses new electronics able to cope with the high rate produced by the high rock radioactivity compared to the one in Gran Sasso underground laboratory. This paper will present the new electronics and mechanical structure developed for the Top Tracker of JUNO along with its expected performance based on the current detector simulation