Nowe dane paleobotaniczne z profilu Ferdynandów 2011 na stanowisku stratotypowym

The new drilling, made in 2011 in the Ferdynandovian interglacial stratotype site in Ferdynandów near Kock (E Poland) allows to carry out high resolution palaeobotanical analyses (including palynological and plant macrofossils ones). The results of the analyses are presented and interpreted against the background of the earlier partition of the ferdynandovian succession (acc. to Janczyk-Kopikowa 1975). A particular attention was paid to the similarity of succession derived from the profile Ferdynandów 2011 with those from neighboring sites in Łuków and Zdany. Very clearly it outlines the division of the three analyzed profiles of the ferdynandovian succession into two distinct interglacials separated by a sediment section bearing the record of the succession typically glacial with its stadial-interstadial oscillations. In the light of the new data from the Ferdynandów 2011 profile, it is clear that the division which was first used by Mamakowa (1996), applies to all ferdynandovian successions in Poland, if only two warm periods were registered in them (formerly known as two climate optima). The warm units in the Ferdynandów 2011 succession correspond to climatostratigraphic units Ferdynandovian 1 and 2, and the cold unit – to Ferdynandovian 1/2 (Lindner et al. 2004). The whole ferdynandovian succession s.l. correlates with the Cromerian complex in the early Middle Pleistocene of Western Europe stratigraphy (Cromerian II Westerhoven and Cromerian III Rosmalen) and marine oxygen isotope stages (MIS) 13–15. The new geological and palaeobotanical data allowed to reconstruct the functioning of interglacial lake and its palaeogeographic context on the stratotype site and its evolution.Stanowiska z zapisem ferdynandowskiej sukcesji pyłkowej są rzadko spotykane, a zwłaszcza te z zapisem paleobotanicznym dwu okresów ciepłych i dzielącego je ochłodzenia. Na tym tle, na szczególną uwagę zasługuje obszar Południowego Podlasia, na którym zostało rozpoznanych 8 stanowisk z osadami interglacjału ferdynandowskiego. Są one udokumentowane badaniami palinologicznymi (Żarski i in. 2009a; Ryc. 1). Na tym obszarze zlokalizowane jest również stanowisko stratotypowe Ferdynandów B z 1963 roku, dla którego opisano w 1981 roku nową wówczas sukcesję pyłkową, określoną jako sukcesja ferdynandowska (Janczyk-Kopikowa i in. 1991; Mojski, 1985; Janczyk-Kopikowa 1991; Rzechowski 1996)

Magma mixing and exsolution phenomena in peralkaline rhyolites: insights from the Gold Flat Tuff, Nevada

The distribution and compositions of chevkinite-group minerals (CGMs) in the pantelleritic Gold Flat Tuff, Nevada, USA, are used to examine three aspects of the evolution of the tuff, which we feel are of general significance in peralkaline magmatism. First, both chevkinite-(Ce) and perrierite-(Ce) occur in certain facies, although normally these phases almost invariably occur in different igneous lithologies. Their co-occurrence in the tuff is due to the mixing of pantelleritic and intermediate magmas. Second, the tuff is the first recorded occurrence of a CGM in a pantellerite eruptive, with possible implications for the crystallization conditions. In particular, low values of ${{a}}\mathrm{SiO}_{2}$ may have stabilized ilmenite + chevkinite rather than aenigmatite, although the unusually high LREE contents ($\sum$La–Sm ${\le }$ 1517 ppm) in the pantellerite may have played a role. Third, an unusual lamellar texture in the CGM is revealed by Atomic Force Microscopy to be formed by a rutile-like phase. The lamellae may have formed by exsolution from a rutile-like layer in the crystal structure. An electron back-scattered diffraction study of a single crystal showed a structural dislocation not apparent optically or by electron back-scattered imaging. This may have wider implications in mineralogical studies

Magma mixing and exsolution phenomena in peralkaline rhyolites: insights from the Gold Flat Tuff, Nevada

The distribution and compositions of chevkinite-group minerals (CGMs) in the pantelleritic Gold Flat Tuff, Nevada, USA, are used to examine three aspects of the evolution of the tuff, which we feel are of general significance in peralkaline magmatism. First, both chevkinite-(Ce) and perrierite-(Ce) occur in certain facies, although normally these phases almost invariably occur in different igneous lithologies. Their co-occurrence in the tuff is due to the mixing of pantelleritic and intermediate magmas. Second, the tuff is the first recorded occurrence of a CGM in a pantellerite eruptive, with possible implications for the crystallization conditions. In particular, low values of ${{a}}\mathrm{SiO}_{2}$ may have stabilized ilmenite + chevkinite rather than aenigmatite, although the unusually high LREE contents ($\sum$La–Sm ${\le }$ 1517 ppm) in the pantellerite may have played a role. Third, an unusual lamellar texture in the CGM is revealed by Atomic Force Microscopy to be formed by a rutile-like phase. The lamellae may have formed by exsolution from a rutile-like layer in the crystal structure. An electron back-scattered diffraction study of a single crystal showed a structural dislocation not apparent optically or by electron back-scattered imaging. This may have wider implications in mineralogical studies

Camtrap DP: an open standard for the FAIR exchange and archiving of camera trap data

Camera trapping has revolutionized wildlife ecology and conservation by providing automated data acquisition, leading to the accumulation of massive amounts of camera trap data worldwide. Although management and processing of camera trap-derived Big Data are becoming increasingly solvable with the help of scalable cyber-infrastructures, harmonization and exchange of the data remain limited, hindering its full potential. There is currently no widely accepted standard for exchanging camera trap data. The only existing proposal, “Camera Trap Metadata Standard” (CTMS), has several technical shortcomings and limited adoption. We present a new data exchange format, the Camera Trap Data Package (Camtrap DP), designed to allow users to easily exchange, harmonize and archive camera trap data at local to global scales. Camtrap DP structures camera trap data in a simple yet flexible data model consisting of three tables (Deployments, Media and Observations) that supports a wide range of camera deployment designs, classification techniques (e.g., human and AI, media-based and event-based) and analytical use cases, from compiling species occurrence data through distribution, occupancy and activity modeling to density estimation. The format further achieves interoperability by building upon existing standards, Frictionless Data Package in particular, which is supported by a suite of open software tools to read and validate data. Camtrap DP is the consensus of a long, in-depth, consultation and outreach process with standard and software developers, the main existing camera trap data management platforms, major players in the field of camera trapping and the Global Biodiversity Information Facility (GBIF). Under the umbrella of the Biodiversity Information Standards (TDWG), Camtrap DP has been developed openly, collaboratively and with version control from the start. We encourage camera trapping users and developers to join the discussion and contribute to the further development and adoption of this standard. Biodiversity data, camera traps, data exchange, data sharing, information standardspublishedVersio

Camtrap DP: an open standard for the FAIR exchange and archiving of camera trap data

Camera trapping has revolutionized wildlife ecology and conservation by providing automated data acquisition, leading to the accumulation of massive amounts of camera trap data worldwide. Although management and processing of camera trap-derived Big Data are becoming increasingly solvable with the help of scalable cyber-infrastructures, harmonization and exchange of the data remain limited, hindering its full potential. There is currently no widely accepted standard for exchanging camera trap data. The only existing proposal, “Camera Trap Metadata Standard” (CTMS), has several technical shortcomings and limited adoption. We present a new data exchange format, the Camera Trap Data Package (Camtrap DP), designed to allow users to easily exchange, harmonize and archive camera trap data at local to global scales. Camtrap DP structures camera trap data in a simple yet flexible data model consisting of three tables (Deployments, Media and Observations) that supports a wide range of camera deployment designs, classification techniques (e.g., human and AI, media-based and event-based) and analytical use cases, from compiling species occurrence data through distribution, occupancy and activity modeling to density estimation. The format further achieves interoperability by building upon existing standards, Frictionless Data Package in particular, which is supported by a suite of open software tools to read and validate data. Camtrap DP is the consensus of a long, in-depth, consultation and outreach process with standard and software developers, the main existing camera trap data management platforms, major players in the field of camera trapping and the Global Biodiversity Information Facility (GBIF). Under the umbrella of the Biodiversity Information Standards (TDWG), Camtrap DP has been developed openly, collaboratively and with version control from the start. We encourage camera trapping users and developers to join the discussion and contribute to the further development and adoption of this standar

Mechanical thrombectomy in acute stroke – Five years of experience in Poland

Objectives Mechanical thrombectomy (MT) is not reimbursed by the Polish public health system. We present a description of 5 years of experience with MT in acute stroke in Comprehensive Stroke Centers (CSCs) in Poland. Methods and results We retrospectively analyzed the results of a structured questionnaire from 23 out of 25 identified CSCs and 22 data sets that include 61 clinical, radiological and outcome measures. Results Most of the CSCs (74%) were founded at University Hospitals and most (65.2%) work round the clock. In 78.3% of them, the working teams are composed of neurologists and neuro-radiologists. All CSCs perform CT and angio-CT before MT. In total 586 patients were subjected to MT and data from 531 of them were analyzed. Mean time laps from stroke onset to groin puncture was 250±99min. 90.3% of the studied patients had MT within 6h from stroke onset; 59.3% of them were treated with IV rt-PA prior to MT; 15.1% had IA rt-PA during MT and 4.7% – emergent stenting of a large vessel. M1 of MCA was occluded in 47.8% of cases. The Solitaire device was used in 53% of cases. Successful recanalization (TICI2b–TICI3) was achieved in 64.6% of cases and 53.4% of patients did not experience hemorrhagic transformation. Clinical improvement on discharge was noticed in 53.7% of cases, futile recanalization – in 30.7%, mRS of 0–2 – in 31.4% and mRS of 6 in 22% of cases. Conclusion Our results can help harmonize standards for MT in Poland according to international guidelines

Rentgenowskie badania struktury modelowych minerałów i ilościowych rozkładów ich gęstości elektronowej

Celem rozprawy doktorskiej było przestawienie, co współczesna krystalografia może wnieść do badań minerałów o różnym stopniu wykształcenia, jakości kryształów. Badałem trzy rodzaje minerałów: (i) alumohydrokalcyt o słabo rozwiniętych igiełkowych kryształów (ii) minerały grupy czewkinitu, złożone roztwory stałe, często również metamiktyczne oraz (iii) fluoryt, którego kryształ był niemal doskonałej jakości.The PhD dissertation presents what modern crystallography can deliver to the studies of minerals. Three types of minerals were studied (i) alumohydrocalcite of poorly developed tiny needle shaped crystals (ii) members of chevkinite group, complex partially metamict solid so-lutions and (iii) fluorite, of nearly prefect quality crystal

Palinostratygrafia i makroflora nowego profilu Ferdynandów 2011

Nowe wiercenie na stratotypowym stanowisku w Ferdynandowie, wykonane w 2011 roku, umożliwiło powtórzenie badań palinologicznych i analiz makroszczątków roślinnych. Pobrano rdzeń z pełną sekwencją osadów jeziornych glacjalno-interglacjalnych. Profil w Ferdynandowie (południowo- wschodnia część Wysoczyzny Żelechowskiej wg Kondrackiego 2002) zlokalizowany jest w obrębie współczesnego bezodpływowego obniżenia. Nowe wiercenie (Ferdynandów 2011) wykonano w sąsiedztwie archiwalnego wiercenia Ferdynandów B (Rzechowski 1996). Profil Ferdynandów 2011 obejmuje osady do głębokości 73 m. Seria interglacjalna ma miąższość 13,5 m i została nawiercona na głębokości 34 m. W jej skład wchodzą torfy, gytie i mułki. Przykrycie stanowią dwa poziomy glin zwałowych korelowane odpowiednio ze zlodowaceniem Odry (MIS 6) i Sanu 2 (MIS 12). Poniżej serii interglacjalnej leżą gliny zwałowe, które korelowane są ze zlodowaceniem Sanu 1 (MIS 16)

SBN60, strontium-barium niobate at 100 K

The title compound, Sr0.6Ba0.4Nb2O6 (strontium barium niobium oxide), belongs to the group of strontium–barium niobates with varying composition of Sr and Ba. Their general formula can be written as SrxBa1 - xNb2O6. Below the Curie temperature, Tc, these materials indicate ferroelectric properties. The Curie temperature for SBN60 is equal to 346±0.5 K so the structure is in the ferroelectric phase at the measurement temperature of 100 K. Characteristic for this family of compounds is the packing along the z-axis. The NbO6 corner-sharing octahedra surround three types of vacancy tunnels with pentagonal, square and triangular shapes. The Sr2+ ions partially occupy two unique sites, the first one located inside the pentagon and the second one in the square tunnels. Consequently, they are situated on the mirror plane and the intersection of two glide planes, respectively. The site inside the pentagonal tunnel is additionally disordered so that the same position is shared by Ba2+ and Sr2+ ions whereas another part of the Ba2+ ion occupies a different position (relative occupancies 0.43:0.41:0.16). One of the NbV atoms and three of the O2− ions occupy general positions. The second NbV atom is located on the intersection of the mirror planes. Two remaining O2− ions are located on the same mirror plane. Only the NbV atom and one of the O2− ions which is located on the mirror plane are not disordered. Each of the remaining O2− ions is split between two sites, with relative occupancies of 0.52:0.48 (O2− ions in general positions) and 0.64:0.36 (O2− ion on the mirror plane)