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    Wyświetlanie 1-7 z 7
    Tytuł:
    Individual rail transport and the conception of a means of transport using a suspended railway track
    Autorzy:
    Kuźma, Kazimierz
    Pyrek, Krzysztof
    Kocik, Wojciech
    Kalinowski, Piotr
    Kamiński, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/1819296.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    suspended bike
    individual mean of underground transport
    Opis:
    Distances to cover are still growing in Polish coal mines. It is not a real issue in terms of material and staff transport, which commonly uses suspended monorails with a friction wheel drive. The problem is how to transfer single people and small loads behind the scheduled times and routes of monorails. The goal of this work was to design and construct an individual mean of transport with its own drive using a monorail track which would meet the requirements of law, safety, mobility and can be used behind the scheduled times of monorails.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2019, 57, 3; 47--57
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A milling machine used for groove making in a tubing inter-rib niche
    Autorzy:
    Cichoń, Tomasz
    Pyrek, Krzysztof
    Ratuszy, Krystian
    Kalinowski, Piotr
    Kamiński, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/1819289.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    tubing milling machine
    shaft lining repairs
    tubing lining
    Opis:
    The sealing of shaft cast iron tubing within a tubing Inter-rib niche is often needed during overhauls and repairs of a shaft lining. Leakages or scratches and fractures can occur within the area of individual tubing of the shaft lining. The Przedsiębiorstwo Budowy Szybów S.A. developed special method for the sealing in question. Around the sealed area, a closed circumference groove of a depth smaller than the tubing thickness is made in the inner shaft lining. The sealing element is placed in this groove and then tightened with a spatial insert, with a hole for the injection of the sealing medium. A specially designed milling machine is used for groove making in the tubing lining of the mine shaft. The milling machine is composed of: power transmission system, special construction for mounting the milling machine to tubing and advance mechanism. The milling machine is driven by a battery drill-driver, and the whole device is mounted to the tubing with the use of specially designed guides with handles.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2019, 57, 3; 27--36
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A milling machine used for groove making in a tubing inter-rib niche
    Autorzy:
    Cichoń, Tomasz
    Pyrek, Krzysztof
    Ratuszny, Krystian
    Kalinowski, Piotr
    Kamiński, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/1819281.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    tubing milling machine
    shaft lining repairs
    tubing lining
    frezarka do tubingów
    naprawa obudowy szybu
    obudowa tubingowa
    Opis:
    The sealing of shaft cast iron tubing within a tubing Inter-rib niche is often needed during overhauls and repairs of a shaft lining. Leakages or scratches and fractures can occur within the area of individual tubing of the shaft lining. The Przedsiębiorstwo Budowy Szybów S.A. developed special method for the sealing in question. Around the sealed area, a closed circumference groove of a depth smaller than the tubing thickness is made in the inner shaft lining. The sealing element is placed in this groove and then tightened with a spatial insert, with a hole for the injection of the sealing medium. A specially designed milling machine is used for groove making in the tubing lining of the mine shaft. The milling machine is composed of: power transmission system, special construction for mounting the milling machine to tubing and advance mechanism. The milling machine is driven by a battery drill-driver, and the whole device is mounted to the tubing with the use of specially designed guides with handles.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2019, 57, 3; 27--36
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution Of The Results Of 1500 Liver Transplantations Performed In The Department Of General, Transplant And Liver Surgery Medical University Of Warsaw
    Autorzy:
    Krawczyk, Marek
    Grąt, Michał
    Grąt, Karolina
    Wronka, Karolina
    Krasnodębski, Maciej
    Stypułkowski, Jan
    Masior, Łukasz
    Hołówko, Wacław
    Ligocka, Joanna
    Nyckowski, Paweł
    Wróblewski, Tadeusz
    Paluszkiewicz, Rafał
    Patkowski, Waldemar
    Zieniewicz, Krzysztof
    Pączek, Leszek
    Milkiewicz, Piotr
    Ołdakowska-Jedynak, Urszula
    Najnigier, Bogusław
    Dudek, Krzysztof
    Remiszewski, Piotr
    Grzelak, Ireneusz
    Kornasiewicz, Oskar
    Kotulski, Marcin
    Smoter, Piotr
    Grodzicki, Mariusz
    Korba, Michał
    Kalinowski, Piotr
    Skalski, Michał
    Zając, Krzysztof
    Stankiewicz, Rafał
    Przybysz, Marta
    Cieślak, Bartosz
    Nazarewski, Łukasz
    Nowosad, Małgorzata
    Kobryń, Konrad
    Wasilewicz, Michał
    Raszeja-Wyszomirska, Joanna
    Piwowarska, Jolanta
    Giercuszkiewicz, Dorota
    Sańko-Resmer, Joanna
    Rejowski, Sławomir
    Szydłowska-Jakimiuk, Monika
    Górnicka, Barbara
    Wróblewska-Ziarkiewicz, Bogna
    Mazurkiewicz, Michał
    Niewiński, Grzegorz
    Pawlak, Jacek
    Pacho, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/1395614.pdf
    Data publikacji:
    2015-05-01
    Wydawca:
    Index Copernicus International
    Tematy:
    liver transplantation
    survival
    outcomes
    donors
    center experience
    center volume
    Opis:
    Liver transplantation is a well-established treatment of patients with end-stage liver disease and selected liver tumors. Remarkable progress has been made over the last years concerning nearly all of its aspects. The aim of this study was to evaluate the evolution of long-term outcomes after liver transplantations performed in the Department of General, Transplant and Liver Surgery (Medical University of Warsaw). Material and methods. Data of 1500 liver transplantations performed between 1989 and 2014 were retrospectively analyzed. Transplantations were divided into 3 groups: group 1 including first 500 operations, group 2 including subsequent 500, and group 3 comprising the most recent 500. Five year overall and graft survival were set as outcome measures. Results. Increased number of transplantations performed at the site was associated with increased age of the recipients (p<0.001) and donors (p<0.001), increased rate of male recipients (p<0.001), and increased rate of piggyback operations (p<0.001), and decreased MELD (p<0.001), as well as decreased blood (p=0.006) and plasma (p<0.001) transfusions. Overall survival was 71.6% at 5 years in group 1, 74.5% at 5 years in group 2, and 85% at 2.9 years in group 3 (p=0.008). Improvement of overall survival was particularly observed for primary transplantations (p=0.004). Increased graft survival rates did not reach the level of significance (p=0.136). Conclusions. Long-term outcomes after liver transplantations performed in the Department of General, Transplant and Liver Surgery are comparable to those achieved in the largest transplant centers worldwide and are continuously improving despite increasing recipient age and wider utilization of organs procured from older donors.
    Źródło:
    Polish Journal of Surgery; 2015, 87, 5; 221-230
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    1000 Liver Transplantations at the Department of General, Transplant and Liver Surgery, Medical University of Warsaw - Analysis of Indications and Results
    Autorzy:
    Krawczyk, Marek
    Grąt, Michał
    Barski, Krzysztof
    Ligocka, Joanna
    Antczak, Arkadiusz
    Kornasiewicz, Oskar
    Skalski, Michał
    Patkowski, Waldemar
    Nyckowski, Paweł
    Zieniewicz, Krzysztof
    Grzelak, Ireneusz
    Pawlak, Jacek
    Alsharabi, Abdulsalam
    Wróblewski, Tadeusz
    Paluszkiewicz, Rafał
    Najnigier, Bogusław
    Dudek, Krzysztof
    Remiszewski, Piotr
    Smoter, Piotr
    Grodzicki, Mariusz
    Korba, Michał
    Kotulski, Marcin
    Cieślak, Bartosz
    Kalinowski, Piotr
    Gierej, Piotr
    Frączek, Mariusz
    Rdzanek, Łukasz
    Stankiewicz, Rafał
    Kobryń, Konrad
    Nazarewski, Łukasz
    Leonowicz, Dorota
    Urban-Lechowicz, Magdalena
    Skwarek, Anna
    Giercuszkiewicz, Dorota
    Paczkowska, Agata
    Piwowarska, Jolanta
    Gelo, Remigiusz
    Andruszkiewicz, Paweł
    Brudkowska, Anna
    Andrzejewska, Renata
    Niewiński, Grzegorz
    Kilińska, Beata
    Zarzycka, Aleksandra
    Nowak, Robert
    Kosiński, Cezary
    Korta, Teresa
    Ołdakowska-Jedynak, Urszula
    Sańko-Resmer, Joanna
    Foroncewicz, Bartosz
    Ziółkowski, Jacek
    Mucha, Krzysztof
    Senatorski, Grzegorz
    Pączek, Leszek
    Habior, Andrzej
    Lechowicz, Robert
    Polański, Sławomir
    Leowska, Elżbieta
    Pacho, Ryszard
    Andrzejewska, Małgorzata
    Rowiński, Olgierd
    Kozieł, Sławomir
    Żurakowski, Jerzy
    Ziarkiewicz-Wróblewska, Bogna
    Górnicka, Barbara
    Hevelke, Piotr
    Michałowicz, Bogdan
    Karwowski, Andrzej
    Szczerbań, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1396689.pdf
    Data publikacji:
    2012-06-01
    Wydawca:
    Index Copernicus International
    Tematy:
    liver transplantation
    indications
    results
    mortality
    Opis:
    The aim of the study was to analyze indications and results of the first one thousand liver transplantations at Chair and Clinic of General, Transplantation and Liver Surgery, Medical University of Warsaw.Material and methods. Data from 1000 transplantations (944 patients) performed at Chair and Clinic of General, Transplantation and Liver Surgery between 1994 and 2011 were analyzed retrospectively. These included 943 first transplantations and 55 retransplantations and 2 re-retransplantations. Frequency of particular indications for first transplantation and retransplantations was established. Perioperative mortality was defined as death within 30 days after the transplantation. Kaplan-Meier survival analysis was used to estimate 5-year patient and graft survival.Results. The most common indications for first transplantation included: liver failure caused by hepatitis C infection (27.8%) and hepatitis B infection (18%) and alcoholic liver disease (17.7%). Early (< 6 months) and late (> 6 months) retransplantations were dominated by hepatic artery thrombosis (54.3%) and recurrence of the underlying disease (45%). Perioperative mortality rate was 8.9% for first transplantations and 34.5% for retransplantations. Five-year patient and graft survival rate was 74.3% and 71%, respectively, after first transplantations and 54.7% and 52.9%, respectively, after retransplantations.Conclusions. Development of liver transplantation program provided more than 1000 transplantations and excellent long-term results. Liver failure caused by hepatitis C and B infections remains the most common cause of liver transplantation and structure of other indications is consistent with European data.
    Źródło:
    Polish Journal of Surgery; 2012, 84, 6; 304-312
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the NO2 concentration prediction possibility based on static and dynamic responses of TGS sensors at changing humidity levels
    Autorzy:
    Kalinowski, Paweł
    Woźniak, Łukasz
    Jasiński, Grzegorz
    Jasiński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/220989.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    TGS sensors
    partial least squares
    nitrogen dioxide
    dynamic measurements
    Opis:
    The commercially available metal-oxide TGS sensors are widely used in many applications due to the fact that they are inexpensive and considered to be reliable. However, they are partially selective and their responses are influenced by various factors, e.g. temperature or humidity level. Therefore, it is important to design a proper analysis system of the sensor responses. In this paper, the results of examinations of eight commercial TGS sensors combined in an array and measured over a period of a few months for the purpose of prediction of nitrogen dioxide concentration are presented. The measurements were performed at different relative humidity levels. PLS regression was employed as a method of quantitative analysis of the obtained sensor responses. The results of NO2 concentration prediction based on static and dynamic responses of sensors are compared. It is demonstrated that it is possible to predict the nitrogen dioxide concentration despite the influence of humidity.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 1; 167-179
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accelerating computation of a reduced order model of a structural system resulting from Craig–Bampton reduction using GPU programming
    Autorzy:
    Górecki, Piotr
    Kalinowski, Miłosz
    Jeziorek, Łukasz
    Broniszewski, Jakub
    Koziara, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/38706110.pdf
    Data publikacji:
    2024
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    GPU
    CPU
    reduced order model
    structural model
    CuPy array library
    model zredukowanego zamówienia
    model strukturalny
    CuPy
    Opis:
    The Craig–Bampton (CB) method is a well-known substructuring technique that reduces the size of a finite element model (FEM) using a set of vibration modes. For large FEA models, the reduction process could be computationally expensive since it requires algebra operations on FEM mode shapes and FEM system sparse matrices. In this paper, we investigate the potential of usage of GPU parallel processing to speed up solving the system of linear equations that results from the CB reduction process made for a model of cyclic structures. A Python based high-level approach, employing the CuPy, GinkGo and STRUMPACK libraries on the GPU, is compared with an optimized Fortran code. In side-to-side comparisons, employing the same inputs, the Python-GPU code is run on a single GPU device and the Fortran code is run on a multi-core compute node. The CB reduction process was split into several parts, each dealing with different kind of algebraic formulation of the problem. Performance comparisons were focused on the sparse system linear solver, since it turned out to be the most time-consuming part. The results suggest that the current GPU-based linear sparse solvers do not surpass the state-of-the-art CPU-based MKL PARDISO solver (at least up to 1M DOFs).
    Źródło:
    Computer Assisted Methods in Engineering and Science; 2024, 31, 1; 51-66
    2299-3649
    Pojawia się w:
    Computer Assisted Methods in Engineering and Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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