Search results for "historic"
showing 10 items of 753 documents
A new Meckel's cartilage from the Devonian Hangenberg black shale in Morocco and its position in chondrichthyan jaw morphospace.
2022
Fossil chondrichthyan remains are mostly known from their teeth, scales or fin spines only, whereas their cartilaginous endoskeletons require exceptional preservational conditions to become fossilized. While most cartilaginous remains of Famennian (Late Devonian) chondrichthyans were found in older layers of the eastern Anti-Atlas, such fossils were unknown from the Hangenberg black shale (HBS) and only a few chondrichthyan teeth had been found therein previously. Here, we describe a Meckel’s cartilage from the Hangenberg black shale in Morocco, which is the first fossil cartilage from these strata. Since no teeth or other skeletal elements have been found in articulation, we used elliptica…
History of Modern Genetics in Germany
2002
The history of modern genetics in Germany during the 20th century is a story of missed chances. In the USA the genetic revolution opened a fascinating new field for ambitious scientists and created a rapidly growing new industry. Meanwhile Germany stood aside, combating with political and social restrictions. Promising young scientists who wanted to work in the field left Germany for the US, and big companies moved their facilities out of the country. Up until the middle of the 1990s molecular biology in Germany remained a “sleeping beauty” even though many brilliant scientists did their jobs very well. Then a somewhat funny idea changed everything: the German minister for education and sci…
Signature of recent historical events in the European Y-chromosomal STR haplotype distribution
2005
Previous studies of human Y-chromosomal single-nucleotide polymorphisms (Y-SNPs) established a link between the extant Y-SNP haplogroup distribution and the prehistoric demography of Europe. By contrast, our analysis of seven rapidly evolving Y-chromosomal short tandem repeat loci (Y-STRs) in over 12,700 samples from 91 different locations in Europe reveals a signature of more recent historic events, not previously detected by other genetic markers. Cluster analysis based upon molecular variance yields two clearly identifiable sub-clusters of Western and Eastern European Y-STR haplotypes, and a diverse transition zone in central Europe, where haplotype spectra change more rapidly with longi…
The Potential Geosite of the “Libeccio Antico” Quarries: a Sedimentological and Stratigraphic Characterisation of Ornamental Stone from Mt Cocuccio, …
2018
The Custonaci marble district of western Sicily is known for the production of a valuable ornamental stone that has been, and nowadays is exploited due to its suitable properties and aesthetic qualities. The “Libeccio Antico” was, among the “marbles”, the most appreciated ornamental stone during the Baroque Age (the XVII–XVIII centuries), due to its strong polychrome contrasts from ivory to yellow, green or dark red. This polychrome pattern is the result of dissolution processes that involved an Upper Triassic peritidal limestone. The varicoloured sediments in paleocavities, collapse breccias, paleosols and neptunian dykes that occur in the “Libeccio Antico” represent the peculiar character…
New Approaches to OCR for Early Printed Books
2020
Books printed before 1800 present major problems for OCR. One of the main obstacles is the lack of diversity of historical fonts in training data. The OCR-D project, consisting of book historians and computer scientists, aims to address this deficiency by focussing on three major issues. Our first target was to create a tool that identifies font groups automatically in images of historical documents. We concentrated on Gothic font groups that were commonly used in German texts printed in the 15th and 16th century: the well-known Fraktur and the lesser known Bastarda, Rotunda, Textura und Schwabacher. The tool was trained with 35,000 images and reaches an accuracy level of 98%. It can not on…
Comment on "Lethally hot temperatures during the Early Triassic greenhouse".
2013
Sun et al . (Reports, 19 October 2012, p. 366) reconstructed Permian to Middle Triassic equatorial seawater temperatures. After correct temporal positioning of their data points, their presumed trends of temperature changes, and hence their assumption of a one-to-one relationship between putative "lethally hot" seawater temperatures and a disputable equatorial "eclipse" of some organisms, are no longer supported by their data.
Specyfika życia liturgicznego w diecezji opolskiej
2022
Jubileusz 50-lecia powstania diecezji opolskiej jest dobrą okazją, by uchwycić i opisać jej specyfikę w wielu obszarach. Niniejszy artykuł jest próbą pokazania specyfiki życia liturgicznego. Czytelnik poznaje odrębne uwarunkowania historyczne tej ziemi, następnie rolę modlitewnika Droga do nieba w kształtowaniu religijności Ślązaków, a także znaczenie Góry Świętej Anny i innych miejsc pielgrzymkowych w tym procesie. Tekst prezentuje też specyfikę życia sakramentalnego oraz roku liturgicznego praktykowane przez wiernych diecezji opolskiej.
Pierwsza z trzech śląskich insurekcji we współczesnej narracji podręcznikowej Casus opracowań dla szkół ponadgimnazjalnych i ponadpodstawowych
2020
Nie wszyscy zdają sobie sprawę z tego, że szkolne podręczniki historii to dla wielu ludzi jedyne książki historyczne, z którymi mieli styczność w ciągu swojego życia. To stwierdzenie powinno zachęcać do systematycznego monitorowania zarówno treści, jak i obudowy dydaktycznej tego rodzaju opracowań. Wychodząc z tego założenia, autor artykułu przeanalizował ponad 20 najpopularniejszych podręczników historii, przygotowanych dla uczniów szkół ponadgimnazjalnych w latach 1989-2019. Celem analizy było zobrazowanie I powstania śląskiego z 1919 r. Zdaniem większości autorów podręczników szkolnych decyzja o przeprowadzeniu plebiscytu na Górnym Śląsku, zapisana w traktacie wersalskim, wywołała antago…
LA OCUPACIÓN SOLUTRENSE DEL ABRIGO DE LA BOJA (MULA, MURCIA, ESPAÑA)
2013
El relleno pleistoceno del Abrigo de la Boja (ADB) empieza con un nivel adscrito al Magdaleniense superior, seguido de un potente paquete con ocupación difusa bajo el cual se desarrolla una secuencia depositada durante el último máximo glacial caracterizada por una serie de estructuras de combustión, de tipo hogar plano/amorfo (open hearth), existiendo también hogares de cubeta. Destaca un hogar enlosado, completo y muy bien conservado, excavado en 2012 y adscrito provisionalmente al Solutreogravetiense. Los niveles solutrenses subyacentes son ricos en elementos de adorno, entre los cuales conchas perforadas de Littorina obtusata y Smaragdia viridis; su industria lítica incluye raspadores, …
Hedge Effectiveness Testing as a Screening Mechanism for Hedge Accounting
2014
Accounting for financial instruments has been subject to much controversy, particularly accounting practices related to derivatives held for hedging purposes. For cash flow hedges, poor matching may result when fair-value accounting is prescribed for the hedging instrument and historical cost is prescribed for the assets that generate the “highly probable forecast transaction” to be hedged. Fair-value accounting may therefore induce excess variations in earnings, which could make a firm appear to be more risky than it actually is. The alternative to fair-value accounting offered by the Financial Accounting Standards Board (FASB) and the International Accounting Standards Board (IASB) to fi…