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Wyszukujesz frazę "Krzyżak, A.T." wg kryterium: Autor

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    Tytuł:
    Qualification of the Most Statistically "Sensitive" Diffusion Tensor Imaging Parameters for Detection of Spinal Cord Injury
    Autorzy:
    Krzyżak, A. T.
    Jasiński, A.
    Adamek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043545.pdf
    Data publikacji:
    2005-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.30.-y
    87.57.-s
    07.57.Pt
    Opis:
    Qualification of the most statistically "sensitive" diffusion parameters using Magnetic Resonance (MR) Diffusion Tensor Imaging (DTI) of the control and injured spinal cord of a rat in vivo and in vitro after the trauma is reported. Injury was induced in TH12/TH13 level by a controlled "weight-drop". In vitro experiments were performed in a home-built MR microscope, with a 6.4 T magnet, in vivo samples were measured in a 9.4 T/21 horizontal magnet The aim of this work was to find the most effective diffusion parameters which are useful in the statistically significant detection of spinal cord tissue damage. Apparent diffusion tensor (ADT) weighted data measured in vivo and in vitro on control and injured rat spinal cord (RSC) in the transverse planes and analysis of the diffusion anisotropy as a function of many parameters, which allows statisticall expose of the existence of the damage are reported.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 1; 207-210
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The isolated Wuchiapingian (Zechstein) Wielichowo Reef and its sedimentary and diagenetic evolution, SW Poland
    Autorzy:
    Fheed, A.
    Świerczewska, A. T.
    Krzyżak, A.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060002.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    reef
    microfacies
    diagenesis
    porosity
    Zechstein Limestone
    Wolsztyn Ridge
    Opis:
    The development of a relatively small and isolated part of the Wuchiapingian, Zechstein Wielichowo Reef was possible owing to a progressive subsidence and frequent sea level fluctuations. Three biofacies were distinguished within the studied object: (1) a shallow-water and highly energetic Acanthocladia biofacies, dominated by bryozoans and crinoids, with poorly preserved porosity, reduced mainly by calcite cementation and compaction; (2) the Horridonia biofacies comprising numerous brachiopods, preferring a moderate depth of water, with comparably poor porosity; and (3) the Fenestella/Kingopora biofacies rich in fossils of the highest variability, related to the deepest and calmest waters, occurring on the top of the profile and showing a significant effective porosity, reaching almost 13%. Among many diagenetic processes altering the reef, several lines of evidence suggest that it was the meteoric diagenesis to enhance its porosity the most extensively. Since no stromatolites are present, the final sea level decrease is interpreted to be rapid, hence creating conditions favourable for the meteoric dissolution. Some intraparticle porosity, however, seems to be of a depositional origin.
    Źródło:
    Geological Quarterly; 2015, 59, 4; 762--780
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Classification of breast cancer malignancy using cytological images of fine needle aspiration biopsies
    Autorzy:
    Jeleń, Ł.
    Fevens, T.
    Krzyżak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/908052.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    złośliwość guza
    klasyfikacja guza
    rak sutka
    skala Blooma-Richardsona
    automated malignancy grading
    FNA grading
    SVM
    breast cancer grading
    Bloom-Richardson
    Opis:
    According to the World Health Organization (WHO), breast cancer (BC) is one of the most deadly cancers diagnosed among middle-aged women. Precise diagnosis and prognosis are crucial to reduce the high death rate. In this paper we present a framework for automatic malignancy grading of fine needle aspiration biopsy tissue. The malignancy grade is one of the most important factors taken into consideration during the prediction of cancer behavior after the treatment. Our framework is based on a classification using Support Vector Machines (SVM). The SVMs presented here are able to assign a malignancy grade based on preextracted features with the accuracy up to 94.24%. We also show that SVMs performed best out of four tested classifiers.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2008, 18, 1; 75-83
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of pattern recognition techniques for the analysis of thin blood smear images
    Autorzy:
    Habibzadeh, M.
    Krzyżak, A.
    Fevens, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/333546.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    binaryzacja
    segmentacja
    granulometria
    CBC
    microscopic medical denoising
    binarization
    segmentation
    edge preservation
    granulometry
    Opis:
    In this paper we discuss applications of pattern recognition and image processing to automatic processing and analysis of histopathological images. We focus on counting of Red and White blood cells using microscopic images of blood smear samples. We provide literature survey and point out new challenges. We present an improved cell counting algorithm.
    Źródło:
    Journal of Medical Informatics & Technologies; 2011, 18; 29-40
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GLCM and GLRLM based texture features for computer-aided breast cancer diagnosis
    Autorzy:
    Filipczuk, P.
    Fevens, T.
    Krzyżak, A.
    Obuchowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/333264.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    diagnostyka wspomagana komputerowo
    analiza teksturalna
    rak piersi
    computer-aided diagnosis
    texture features
    breast cancer
    Opis:
    This paper presents 15 texture features based on GLCM (Gray-Level Co-occurrence Matrix) and GLRLM (Gray-Level Run-Length Matrix) to be used in an automatic computer system for breast cancer diagnosis. The task of the system is to distinguish benign from malignant tumors based on analysis of fine needle biopsy microscopic images. The features were tested whether they provide important diagnostic information. For this purpose the authors used a set of 550 real case medical images obtained from 50 patients of the Regional Hospital in Zielona Góra. The nuclei were isolated from other objects in the images using a hybrid segmentation method based on adaptive thresholding and kmeans clustering. Described texture features were then extracted and used in the classification procedure. Classification was performed using KNN classifier. Obtained results reaching 90% show that presented features are important and may significantly improve computer-aided breast cancer detection based on FNB images.
    Źródło:
    Journal of Medical Informatics & Technologies; 2012, 19; 109-115
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Web–based framework for breast cancer classification
    Autorzy:
    Bruździński, T.
    Krzyżak, A.
    Fevens, T.
    Jeleń, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/91866.pdf
    Data publikacji:
    2014
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    breast cancer
    classification
    cytological image
    aspiration biopsy
    feature vector
    classifier
    multilayer perceptron
    segmentation algorithm
    Opis:
    The aim of this work is to create a web-based system that will assist its users in the cancer diagnosis process by means of automatic classification of cytological images obtained during fine needle aspiration biopsy. This paper contains a description of the study on the quality of the various algorithms used for the segmentation and classification of breast cancer malignancy. The object of the study is to classify the degree of malignancy of breast cancer cases from fine needle aspiration biopsy images into one of the two classes of malignancy, high or intermediate. For that purpose we have compared 3 segmentation methods: k-means, fuzzy c-means and watershed, and based on these segmentations we have constructed a 25–element feature vector. The feature vector was introduced as an input to 8 classifiers and their accuracy was checked. The results show that the highest classification accuracy of 89.02 % was recorded for the multilayer perceptron. Fuzzy c–means proved to be the most accurate segmentation algorithm, but at the same time it is the most computationally intensive among the three studied segmentation methods.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2014, 4, 2; 149-162
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the properties of polymer composites with carbon nanotubes in the aspect of their abrasive wear
    Autorzy:
    Krzyżak, A.
    Kosicka, E.
    Szczepaniak, R.
    Szymczak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/367013.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    polymer composites
    tribology
    reinforcement
    carbon nanotubes
    CNTs
    wear
    kompozyty polimerowe
    trybologia
    wzmocnienie
    nanorurki węglowe
    zużycie
    Opis:
    Purpose: Carbon nanotubes are used in composite materials due to the improvement of (including tribological) properties of composites, especially thermoplastic matrix composites. This demonstrates the potential of CNTs and the validity of research on determining the impact of this type of reinforcement on the composite materials under development. Design/methodology/approach: The article presents selected results of research on polymer composites made of C.E.S. R70 resin, C.E.S. H72 hardener with the addition of a physical friction modifier (CNTs) with a percentage by volume of 18.16% and 24.42%, respectively, which also acts as a reinforcement. The produced material was subjected to hardness measurements according to the Shore method and EDS analysis. The study of abrasive wear in reciprocating movement was carried out using the Taber Linear Abraser model 5750 tribotester and a precision weight. The surface topography of the composite material after tribological tests was determined using scanning electron microscopy (SEM). Some of the mentioned tests were carried out on samples made only of resin, used as the matrix of the tested polymer composite. Findings: Carbon nanotubes used in polymer matrix composites, including bisphenol A/F epoxy resin have an influence on the tribological properties of the material. The addition of carbon nanotubes contributed to a 24% increase in the Ra parameter relative to pure resin, to a level corresponding to rough grinding of steel. Research limitations/implications: The results of the tests indicate the need to continue research in order to optimize the composition of composites in terms of operating parameters of friction nodes in broadly understood aviation. Originality/value: The analysed literature did not find any studies on the impact of the addition of carbon nanotubes on epoxy resins based on bisphenol A/F. Due to the wide scope of application of such resins, the properties of such composite materials in which carbon nanotubes are the reinforcing phase have been investigated.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 1; 5-12
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in breast cancer incidence and stage distribution between urban and rural female population in Podlaskie voivodship, Poland in years 2001-2002
    Autorzy:
    Krzyzak, M
    Maslach, D.
    Juczewska, M.
    Lasota, W.
    Rabczenko, D.
    Marcinkowski, J.T.
    Szpak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/50013.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    Polska
    Podlasie voivodship
    rural population
    urban population
    woman
    breast cancer
    human disease
    distribution
    differentiation
    incidence
    disease stage
    Population Screening Programme
    monitoring
    diagnosis
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2010, 17, 1; 159-162
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Breast cancer survival gap between urban and rural female population in Podlaskie voivodship, Poland, in 2001-2002. Population study
    Autorzy:
    Krzyzak, M
    Maslach, D.
    Bielska-Lasota, M.
    Juczewska, M.
    Rabczenko, D.
    Marcinkowski, J.T.
    Szpak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/50248.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    environmental exposure
    rural population
    urban population
    human disease
    breast cancer
    survival rate
    inequality
    Podlasie region
    Polska
    female
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 277-282
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ropa naftowa i gaz ziemny w Polsce : obszary perspektywiczne oraz postępowanie przetargowe w 2018 r. (część I)
    Oil and gas in Poland : prospects and licensing rounds in 2018 in terms of hydrocarbon concessions (part I)
    Autorzy:
    Jagielski, G.
    Feldman-Olszewska, A.
    Janas, M.
    Kiersnowski, H.
    Krzyżak, E.
    Podhalańska, T.
    Roszkowska-Remin, J.
    Sobień, K.
    Wójcik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075843.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    koncesje na poszukiwanie
    rozpoznawanie węglowodorów
    eksploatacja węglowodorów
    Ministerstwo Środowiska
    concessions for prospection
    exploration of hydrocarbons
    exploitation of hydrocarbons
    Polish Ministry of the Environment
    Opis:
    On the 28th of June 2017, the Polish Ministry of the Environment announced the boundaries of the tender areas selected for the third licensing round for concessions for prospection, exploration and exploitation of hydrocarbons. This round is going to be proceeded in the 4th Quarter of 2018 and 1st Quarter of 2019. The geologists of the Polish Geological Survey selected 15 tender areas (promising for discoveries of conventional and unconventional oil and gas fields) based on the geological data resources stored in the National Geological Archive, other published data, as well as the knowledge and experience of employees of the Polish Geological Institute - National Research Institute and the Polish Ministry of the Environment. All selected areas are located onshore. In this article we describe 10 tender areas located in the Gdańsk, Pomerania and Wielkopolska petroleum provinces. Other tender areas situated in the Carpathians (Błażowa, Proszowice W, Rudnik-Lipiny, Wetlina) and in the Lublin Petroleum Province (Ryki) will be discussed in the next publication. Three areas: Wejherowo, Bytów and Braniewo-Miłakowo are located in the northern Poland (Gdańsk Petroleum Province). The exploration targets of these areas are generally related to structural-lithological traps in the Middle Cambrian beds of the Baltic Basin, as well as to unconventional shale oil and gas in the Lower Paleozoic. Seven tender areas are situated in the northwestern Poland (Pomerania and Wielkopolska Petroleum Provinces). Three of them - Chodzież, Piła and Leszno are dedicated to conventional gas deposits in the Rotliegend sandstones and, in some cases, also oil deposits in the Zechstein/Main Dolomite. Excluding the Leszno tender area, chances for tight gas discoveries exist within the Rotliegend sandstones. The exploration target of the Konin tender area is related to possible conventional fields in the Jurassic and Lower Cretaceous beds. In the Pomerania region the exploration target is generally related to conventional hydrocarbon deposits in the Devonian, Carboniferous and Permian (Rotliegend and Zechstein/Main Dolomite). Three tender areas are situated within the region of: Sierpowo, Orle and Chełmno. As a rule, a concession is granted for a period of 10 to 30 years and is divided into 2 phases: 1) prospecting and exploration phase (which lasts from 4 to 5 years and can be extended to another 2-year period), 2) production phase. Every entity interested in obtaining a concession needs to undergo the qualification procedure. We believe that this publication will contribute to better understanding of the offered tender areas and encourage activity in the Polish oil and gas sector.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 12; 724--740
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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