Temat: analysis 14C - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Datowanie bezwzględne próbek drewna ze stanowisk: Grabowiec stan. 1 i Hruszowice - Gaje stan. 2, woj. podkarpackie
Absolute dating of wood samples from sites: Grabowiec site 1 and Hruszowice – Gaje site 2, the Podkarpackie Voivodeship
Autorzy:: Krąpiec, Marek
Powiązania:: https://bibliotekanauki.pl/articles/896891.pdf
Data publikacji:: 2014
Wydawca:: Narodowy Instytut Dziedzictwa
Tematy:: dendrochronology
analysis 14C
Grabowiec site 1
Hruszowice-Gaje site 2
Opis:: The article presents the results of dendrochronological and radiocarbon datings for 2 archaeological sites. As a result, two dates were obtained on the basis of dendrochronological measurements and four radiocarbon.
Źródło:: Raport; 2014, 9; 165-168
2300-0511
Pojawia się w:: Raport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Middle and Upper Weichselian Pleniglacial fluvial erosion and sedimenta- tion phases in Southwestern Poland, and their relationship to Scandinavian ice sheet build-up and retreat
Fazy sedymentacyjne i erozyjne środkowego i górnego plenivistulianu oraz ich związek z transgresją i regresją lądolodu skandynawskiego w południowo-zachodniej Polsce
Autorzy:: Krzyszkowski, D.
Kuszell, T.
Powiązania:: https://bibliotekanauki.pl/articles/191674.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Pleistocene
Weichselian
fluvial erosion and sedimention
pollen analysis
14C dating
SW Poland
Opis:: The sequence of Weichselian sediments and processes in SW Poland is almost identical to that of central Poland. Generally, three fluvial units occur, comprising silts and sands coarsening upwards to silts, sands and gravels, with aeolian deposits on top. This suggests very uniform processes throughout the palaeogeographic zone. To the south of this zone, there was extensive loess deposition and glacial deposition to the north. Climatic conditions during the Middle and Upper Weichselian Pleniglacial in SW Poland were similar to those in central Poland and northwestern Europe, though the period of 47-43 kyrs BP was slightly milder in SW Poland (shrub tundra, forest-tundra). Climatic conditions during the periods 38-27 kyrs BP and 23-18 kyrs BP were very uniform throughout central Europe, including SW Poland, though there may have been a strong north-south climatic gradient during the former period, as data from the loessic zone indicate at least patches of boreal forest or forest-tundra conditions in SW Poland at that time. It is also possible that there was a Middle Weichselian Pleniglacial interstadial with a lower age boundary at 25,900 ą 700 years BP, characterised by Pinus-Picea forest with no heliophytes. This interstadial represents the last mild period before the advance of the late Weichselian ice sheet into SW Poland. The Weichselian fluvial deposition of SW and central Poland may have been punctuated by at least three major erosional phases, characterised by similar incision depths during the cold stages. Erosion took place, with certainty, at around 75-60 kyrs BP (Lower Pleniglacial) and 27 kyrs BP, very probably at around 23/22 kyrs and possibly at around 40 kyrs BP, and valley aggradation occurred during the milder stages. The Upper Pleniglacial was characterised by valley aggradation, associated with southward ice sheet advance and restricted fluvial outflow. However, the frequent Middle Pleniglacial Weichselian climatic oscillations did not initiate sedimentation and erosion, they controlled only river discharge and type of fluvial sedimentation and aeolian activity. The occurrence of the erosional and aggradational phases were controlled by the changes in ice volume in Scandinavia, ice sheet build-up and retreat, respectively.
Źródło:: Annales Societatis Geologorum Poloniae; 2007, 77, No 1; 17-38
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reconstruction of atmospheric lead and heavy metal pollution in the Otrębowskie Brzegi peatland (S Poland)
Autorzy:: Pawełczyk, Fatima
Bloom, Karolina
Jucha, Witold
Michczyński, Adam
Okupny, Daniel
Sikorski, Jarosław
Tomkowiak, Julita
Zając, Ewelina
Fagel, Nathalie
Powiązania:: https://bibliotekanauki.pl/articles/2058587.pdf
Data publikacji:: 2019
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Pb isotopes
pollution
elemental record
human activity
14C dating
210Pb dating
palynological analysis
Opis:: We reconstruct palaeoenvironmental changes since the Late Holocene in the Orava-Nowy Targ Basin, with an emphasis on anthropogenic influence (Walker et al., 2018). This reconstruction employs multiproxy analyses of the Otrębowskie Brzegi poor fen. We combined radiocarbon and 210Pb dating with elemental geochemistry, stable lead isotopes, and palaeobotanical analyses. The core we investigated covers a period from 4200 ± 100 BC to the present, with a peat accumulation rate varying between 0.001 and 0.243 cm y-1. Heavy metal concentrations, Pb isotopic ratios, and a palynological analysis revealed a significant impact of human activities in the past. The highest concentration and accumulation rate of Pb, were found around 1950 AD. The 206Pb/207Pb quotient ranged between 1.168 and 1.223, with average value around 1.198. Most of the interpretation was based on Pb and its stable isotopes; however, other elements were also important indicators of natural and anthropogenic environmental changes. Our results revealed similarities between the geochemical composition of the peatland studied and other peatlands from the Orava-Nowy Targ Basin.
Źródło:: Geological Quarterly; 2019, 63, 3; 568--585
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Efficiency frontier on Japanese banking system
Autorzy:: Ivan, Ionut Cristian
Powiązania:: https://bibliotekanauki.pl/articles/646300.pdf
Data publikacji:: 2015-12
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: data envelopment analysis
free disposability hull
efficiency frontier
distance
financial efficiency
super efficiency
C14
D24
Opis:: Since the emergence of the efficiency frontier techniques, a series of comparisons between the methods that led to the resultant efficiency has been presented. In this paper, data from 99 Japanese banks are used in order to prove the applicability of efficiency frontier analysis on the East-Asian financial system and to reveal the differences between inter and intra-regional banks, showing the effect of the present financial crisis on the efficiency of the studied banks. DEA and FDH are used to determine the technical and scale efficiency of the analyzed banks and also it compares fully efficient banks by ranking them through the super-efficiency notion.
Źródło:: Ekonomia Międzynarodowa; 2015, 012
2082-4440
2300-6005
Pojawia się w:: Ekonomia Międzynarodowa
Dostawca treści:: Biblioteka Nauki

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