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    Tytuł:
    Preliminary report on the microvertebrate faunal remains from the Late Triassic locality at Krasiejów, SW Poland
    Autorzy:
    Kowalski, Jakub
    Bodzioch, Adam
    Janecki, Piotr A.
    Ruciński, Maciej R.
    Antczak, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/191960.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microvertebrates
    archosauromorphs
    fish
    amphibians
    Triassic
    Keuper
    Polska
    Opis:
    Fossil vertebrate remains from the Keuper unit in the vicinity of the village of Krasiejów have been analyzed for almost two decades. However, the main goal of these works was focused mainly on large vertebrates. Here the authors present the first description of microvertebrate fossils from that site. The collection of around 5,000 specimens is mainly comprised of teeth and scales. The most numerous remains belong to osteichthyans: dipnoans (Ptychoceratodus and cf. Arganodus), palaeoniscids, semionotids, redfieldiids and chondrichthyans, such as Lonchidion sp., which is the first indisputable record of that genus in the Upper Triassic of Poland and the first shark at the Krasiejów locality. Tetrapod fossils consist of temnospondyl amphibians, rhynchocephalian lepidosauromorphs and archosauromorphs. Among them, temnospondyl amphibian remains are the most numerous and are represented mostly by Metoposaurus. However, on the basis of diversity in tooth morphotypes, the occurrence of other taxa cannot be excluded. Rhynchocephalians are composed of 7 fragmentary jaw morphotypes with dentition, which could indicate high taxonomic diversity (cf. Planocephalosaurus, cf. Diphydontosaurus and cf. Clevosaurus). The most varied fossil group was assigned to the archosauromorphs. The authors can distinguish at least 19 teeth morphotypes, which show similarities to the dentition of: protorosaurians (cf. Tanystropheidae), pseudosuchians (cf. Protecovasaurus, cf. Revueltosaurus), early crocodylomorphs and basal sauropodomorph dinosaurs. The first occurrence of a theropod dinosaur and cynodonts at the Krasiejów locality is also recorded. However, their remains are very rare. These new records show a high taxonomic diversity at the Krasiejów locality that contributes to our deeper understanding of Late Triassic ecosystem of Poland.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2019, 89, 3; 291-305
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New models and algorithms for RNA pseudoknot order assignment
    Autorzy:
    Zok, Tomasz
    Badura, Jan
    Swat, Sylwester
    Figurski, Kacper
    Popenda, Mariusz
    Antczak, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/911230.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    RNA pseudoknot order
    conflict graph
    vertex coloring
    maximum independent set
    integer programming
    kolorowanie grafu
    zbiór niezależny
    programowanie całkowitoliczbowe
    Opis:
    The pseudoknot is a specific motif of the RNA structure that highly influences the overall shape and stability of a molecule. It occurs when nucleotides of two disjoint single-stranded fragments of the same chain, separated by a helical fragment, interact with each other and form base pairs. Pseudoknots are characterized by great topological diversity, and their systematic description is still a challenge. In our previous work, we have introduced the pseudoknot order: a new coefficient representing the topological complexity of the pseudoknotted RNA structure. It is defined as the minimum number of base pair set decompositions, aimed to obtain the unknotted RNA structure. We have suggested how it can be useful in the interpretation and understanding of a hierarchy of RNA folding. However, it is not trivial to unambiguously identify pseudoknots and determine their orders in an RNA structure. Therefore, since the introduction of this coefficient, we have worked on the method to reliably assign pseudoknot orders in correspondence to the mechanisms that control the biological process leading to their formation in the molecule. Here, we introduce a novel graph coloring-based model for the problem of pseudoknot order assignment. We show a specialized heuristic operating on the proposed model and an alternative integer programming algorithm. The performance of both approaches is compared with that of state-of-the-art algorithms which so far have been most efficient in solving the problem in question. We summarize the results of computational experiments that evaluate our new methods in terms of classification quality on a representative data set originating from the non-redundant RNA 3D structure repository.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2020, 30, 2; 315-324
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New functionality of RNAComposer: an application to shape the axis of miR160 precursor structure
    Autorzy:
    Antczak, Maciej
    Popenda, Mariusz
    Zok, Tomasz
    Sarzynska, Joanna
    Ratajczak, Tomasz
    Tomczyk, Katarzyna
    Adamiak, Ryszard
    Szachniuk, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/1038732.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    RNA 3D structure prediction
    RNAComposer
    plant miRNA precursor
    Opis:
    RNAComposer is a fully automated, web-interfaced system for RNA 3D structure prediction, freely available at http://rnacomposer.cs.put.poznan.pl/ and http://rnacomposer.ibch.poznan.pl/. Its main components are: manually curated database of RNA 3D structure elements, highly efficient computational engine and user-friendly web application. In this paper, we demonstrate how the latest additions to the system allow the user to significantly affect the process of 3D model composition on several computational levels. Although in general our method is based on the knowledge of secondary structure topology, currently the RNAComposer offers a choice of six incorporated programs for secondary structure prediction. It also allows to apply a conditional search in the database of 3D structure elements and introduce user-provided elements into the final 3D model. This new functionality contributes to a significant improvement of the predicted 3D model reliability and it facilitates a better model adjustment to the experimental data. This is exemplified based on the RNAComposer application for modelling of the 3D structures of precursors of the miR160 family members.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 4; 737-744
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genotyp a morfologia trzustki u chorych na mukowiscydozę
    Autorzy:
    Jończyk-POtoczna, Katarzyna
    Sosnowski, Piotr
    Warzywoda, Małgorzata
    Stężowska-Kubiak, Sylwia
    Lisowska, Aleksandra
    Cofta, Szczepan
    Pogorzelski, Andrzej
    Skorupa, Wojciech
    Minarowska, Alina
    Antczak, Andrzej
    Biczysko, Maciej
    Walkowiak, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/552705.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    mukowiscydoza
    genotyp
    morfologia trzustki
    rezonans magnetyczny.
    Źródło:
    Family Medicine & Primary Care Review; 2011, 2; 161-164
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient Positioning of Two Long-Range Passenger Aircraft in Formation Flight
    Autorzy:
    Antczak, Adam
    Lasek, Maciej
    Sibilski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/36782619.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    formation flight
    optimisation
    strip theory
    dynamics of flight
    Opis:
    In today’s world, each airline is forced to look for new savings opportunities. One of the methods may be the use of formation flights in daily flight operations, which may allow a reduction in fuel consumption by several percentages. The paper presents the genesis of how the consideration of such flights and the possibility of their implementation in an airline had started. The leader’s plane generates vortices, which, with the proper alignment of the planes to one another, can reduce the drag on the wingman. However, the wrong position may not only have no positive effect but also may be a threat to stable wingman flight. The article presents a method of using these vortices in such a way as to have a positive impact on the aerodynamics of the wingman. A favourable position in the vertical and horizontal axes will be determined in relation to the vortex generated by the leader’s plane in order to obtain the greatest benefit in reducing fuel consumption. The paper presents an operational analysis of the possibility of maintaining such a distance to obtain profit on fuel but also to ensure the highest level of safety of the flight.
    Źródło:
    Transactions on Aerospace Research; 2022, 3 (268); 21-31
    0509-6669
    2545-2835
    Pojawia się w:
    Transactions on Aerospace Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diversity of vertebrate remains from the Lower Gogolin Beds (Anisian) of southern Poland
    Autorzy:
    Antczak, Mateusz
    Ruciński, Maciej
    Stachacz, Michał
    Matysik, Michał
    Król, Jan J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1836253.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Chondrichthyes
    Actinopterygii
    Reptilia
    fossil vertebrate
    tempestite
    coprolite
    Middle Triassic
    Opis:
    Middle Triassic (Muschelkalk) limestones and dolostones of southern Poland contain vertebrate remains, which can be used for palaeoecological and palaeogeographical analyses. The results presented concern vertebrate remains uncovered at four localities in Upper Silesia and one on Opole Silesia, a region representing the south-eastern margin of the Germanic Basin in Middle Triassic times. The most abundant remains in this assemblage are fish remains, comprising mostly actinopterygian teeth and scales. Chondrichthyan and sauropsid remains are less common. Reptilian finds include vertebrae, teeth and fragments of long bones, belonging to aquatic or semi-aquatic reptiles, such as nothosaurids, pachypleusorosaurids, and ichthyosaurids. Also, coprolites of possibly durophagous and predacious reptiles occur. In the stratigraphic column of Mikołów, actinopterygian remains are the most numerous and no distinct changes of the taxonomic composition occur. Although this assemblage differs from those described at other localities (Ząbkowice with numerous chondrichthyans, Żyglin, and Płaza with common sauropsid fossils), sampling bias has to be considered.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 4; 419-433
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania rezonansu magnetycznego u chorych na mukowiscydozę: wielkość trzustki
    Autorzy:
    Jończyk-Potoczna, Katarzyna
    Sosnowski, Piotr
    Warzywoda, Małgorzata
    Stężowska-Kubiak, Sylwia
    Lisowska, Aleksandra
    Goździk-Spychalska, Joanna
    Pogorzelski, Andrzej
    Skorupa, Wojciech
    Minarowska, Alina
    Antczak, Andrzej
    Biczysko, Maciej
    Walkowiak, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/552820.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    mukowiscydoza
    trzustka
    morfologia trzustki
    funkcja trzustki
    rezonans magnetyczny
    Źródło:
    Family Medicine & Primary Care Review; 2011, 2; 157-160
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the chimney cap as a method of improving the effectiveness of natural ventilation in buildings
    Autorzy:
    Antczak-Jarząbska, Romana
    Niedostatkiewicz, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/1573919.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    natural ventilation
    chimney cap
    ACH
    wind effect
    effectiveness
    Opis:
    Adequately designed natural ventilation is the cheapest and easiest way to effectively remove indoor pollutants and keep the air inside a building fresh. A prediction of the performance and effectiveness of ventilation in order to determine the design of a ventilation system can provide real and long-term cost savings. The worst time in terms of the efficiency of natural ventilation is the spring-autumn transition period [7]. In order to improve the efficiency of natural ventilation, chimney caps are used, among others. They are designed to improve the chimney effect described in colloquial language as a chimney draft. The chimney effect is a physical phenomenon of the formation of a spontaneous flow of a warmer gas, e.g. air, from the bottom up in stem channels [12]. The article analyses the influence of the chimney cowl on the improvement of the chimney effect in an apartment of a multi-family building with natural ventilation. Long-term tests of the chimney draft were carried out for the case without and with a chimney cap. The paper presents the results of the performance (air change rate, ACH) of natural ventilation for a building with an inlet gap measured for the transitional season (between the heating and the summer season). The measurements were performed during a windy period.
    Źródło:
    Polish Maritime Research; 2020, 3; 168-175
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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