Autor: Piórkowski, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Construction of educational color layer for echocardiography simulator
Autorzy:: Piórkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/333069.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: tomografia komputerowa
echokardiografia przezprzełykowa
symulator
transesophageal echocardiography
computed tomography
simulator
Opis:: There is the educational color layer for CT2TEE, an online transesophageal echocardiography (TEE) simulator accessible at www.ct2tee.agh.edu.pl in the current paper presented. TEE is nowadays one of the most important diagnostic tools in cardiology. Because of the semi-invasive nature of this examination and complexity of heart structure the training process of learning TEE can be long and difficult, especially in patients with congenital heart disease. Therefore CT2TEE is constructed, the first online TEE simulator, described in detail in the previous publication. This paper contains an overview on echocardiographic simulators and the previously constructed CT2TEE simulator. A detailed description of the construction and operating principles of the Educational Color Layer (ECL), an additional feature of the CT2TEE simulator, is provided. ECL, being a color information storing and indexing platform, enables to mark various 3D heart structures and facilitates the process of learning TEE.
Źródło:: Journal of Medical Informatics & Technologies; 2010, 16; 167-171
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Minimization of the total completion time for asynchronous transmission in a packet data-transmission system
Autorzy:: Piórkowski, A.
Werewka, J.
Powiązania:: https://bibliotekanauki.pl/articles/907757.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: szeregowanie wiadomości
kolejkowanie komunikatu
system rozproszony
system czasu rzeczywistego
message scheduling
message queuing
distributed system
real-time systems
Opis:: The minimization of the total completion time for asynchronous transmission in distributed systems is discussed. Attention is focused on the problem of message scheduling on part of the sender. Messages to be sent form a queue, and the order in which they are to be sent has to be first established. The methods of scheduling messages, which minimize the factor of the total completion time, are presented herein. The message-scheduling problem becomes considerably complicated when the stream of data transmitted between the sender and the receiver is organized into packets. A scheduling rule, according to which the shortest messages (SPT-Shortest Processing Time) are selected as the first to be sent, has been proven to be appropriate for the proposed model. A heuristic algorithm for scheduling messages with real-time constraints is proposed. The performance of the scheduling algorithm is experimentally evaluated. The results of the study show the possibility of improving the total completion time from a few to ten percent, depending on the characteristics of the sender. Thus, the practicability of the method has been proved.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2010, 20, 2; 391-400
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Selected issues of corneal endothelial image segmentation
Autorzy:: Piórkowski, A.
Gronkowska-Serafin, J.
Powiązania:: https://bibliotekanauki.pl/articles/333407.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: śródbłonek rogówki
segmentacja komórki
binaryzacja
corneal endothelial
cell segmentation
binarization
Opis:: This article concerns the analysis of corneal endothelial image. The basic problems of binarization and segmentation of these images are discussed. Preprocessing methods are proposed, consisting of median and convolution filtration, to remove noise. An algorithm of normalization of the average brightness of the vertical and horizontal is presented. The problem of binarization is discussed. At the end the proposal of segmentation algorithm is reported.
Źródło:: Journal of Medical Informatics & Technologies; 2011, 17; 239-245
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Constructing software for analysis of neuron, glial and endothelial cell numbers and density in histological Nissl-stained rodent brain tissue
Autorzy:: Kołodziejczyk, A.
Ładniak, M.
Piórkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/333525.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: cell segmentation
cell-counting
image processing
image analysis
segmentacja komórki
zliczanie komórek
przetwarzanie obrazu
analiza obrazu
Opis:: Cell number, density and volume of white and gray matter in brain structures are not constant values. Cellular alterations in brain areas might coincide with neurological and psychiatric pathologies as well as with changes in brain functionality during selection experiments, pharmacological treatment or aging. Several softwares were created to facilitate quantitative analysis of brain tissues, however results obtained from these softwares require multiple manual settings making the computing process complex and time-consuming. This study attempts to establish half automated software for fast, ergonomic and an accurate analysis of cellular density, cell number and cellular surface in morphologically different brain areas: cerebral cortex, pond and cerebellum. Images of brain sections of bank voles stained with standard cresyl-violet technique (Nissl staining), were analyzed in designed software. Results were compared with other commercially available tools regarding number of steps to be done by user and number of parameters possible to measure.
Źródło:: Journal of Medical Informatics & Technologies; 2014, 23; 77-85
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Heuristic algorithms for the optimization of total weighted completion time for asynchronous transmission in a packet data transmission system
Autorzy:: Piórkowski, A.
Werewka, J.
Bielecka, M.
Powiązania:: https://bibliotekanauki.pl/articles/206673.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: total weighted completion time
total cost factor
optimization
heuristic algorithms
packet transmission
Opis:: In this paper, the minimization of total weighted completion time (total cost) for asynchronous transmission in distributed systems is discussed. Special attention has been paid to the problem of message scheduling on the sender side. Messages to be sent form a queue, therefore the order in which they are to be sent has to be set. Scheduling algorithms can be chosen to optimize scheduling criteria such as total completion time or total weighted completion time. The message scheduling problem becomes complicated considerably when the transmitted data stream between the sender and the receiver is formed into packets. TheWSPT (Weighted Shortest Processing Time) scheduling rule, which orders messages according to non-decreasing length and weight ratios has been proven to be non-optimal. It has been demonstrated that the problem of minimizing the total weighted completion time is NP-hard. Here, we propose heuristic algorithms for scheduling messages and experimentally evaluate the performance of these scheduling algorithms.
Źródło:: Control and Cybernetics; 2014, 43, 4; 507-529
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Pattern matching algorithms in preparation of a 3D heart models
Autorzy:: Bernady, G.
Gackowski, A.
Kempny, A.
Piórkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/333318.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: dopasowywanie wzorca
symulator
echokardiograficzne badanie przezprzełykowe
tomografia komputerowa
pattern matching
simulator transoesophageal echocardiography
computed tomography
Opis:: The CT2TEE is an online transoesophageal echocardiography (TEE) simulator [2] developed on the AGH University of Science and Technology. As a basis for the displayed real-time simulation it uses 3D models created by hand from the CT images. The aim of this paper is to present algorithms developed specifically for efficient editing and preparation of three-dimensional models of the heart for use in the CT2TEE simulator. A detailed description of proposed algorithms, their advantages and limitations, is provided.
Źródło:: Journal of Medical Informatics & Technologies; 2011, 17; 313-319
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Using computed tomography images for a heart modeling
Autorzy:: Szostek, K.
Piórkowski, A.
Kempny, A.
Banyś, R.
Gackowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/333424.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: echokardiografia
przetwarzanie obrazów
symulacja medyczna
echocardiography
image processing
medical simulation
Opis:: In this paper the quality and analysis of the computed tomography scan sets are presented in the context of creating a 3DD model of a heart for the ultrasonography simulator. Data was collected during regular patients examination, using various equipment and technique, therefore not every set has required quality. CT data can be fast characterized with histogram that can show if the brightness ranges of objects (heart structures) are selective. This makes CT data usable for simulation by applying a transform function on the CT images to produce ultrasonographylike images. The aim is to use a PACS system of Hospital, which is the source of data. Therefore a proper technique and system for analysis is needed.
Źródło:: Journal of Medical Informatics & Technologies; 2012, 19; 75-84
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Piórkowski, A." wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język