Autor: Binkowski, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simulation of the reaction of X-ray radiation with an object while densitometry tests
Autorzy:: Binkowski, M.
Dyszkiewicz, A.
Wróbel, Z.
Powiązania:: https://bibliotekanauki.pl/articles/333342.pdf
Data publikacji:: 2004
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: badanie densytometryczne
tkanka kostna
gęstość mineralna kości
densitometry test
bone tissue
bone mineral density
simulation of absorption law
Opis:: The computer modelling of absorption effect of X-ray radiation in the bone tissue was analysed. An image, which is produced as a result of X-ray absorption was computed based on the absorption law. The simulation enables to define dimensions and resolution of space where the experiment will be realised. A model of a sample contains information about its geometry and distribution of density. It can be made as simple solids or loaded from external source, like files. This method may be useful to load information about bone microstructure into the simulation space. A source of X-ray radiation was defined as a plate, which has initial radiation intensity. Rules of radiation propagation were simplified to straight model where radiation propagates in the direction perpendicular to the surface of detector which records an image. The image is generated by computation of partial absorption for each space elements. The results of simulation of model of micro-structure of bone tissue are presented. They can be useful to show when densitometry test does not contain accurate and full information about bone tissue. It may by helpful in the future while searching for reasons of incomplete correlation between mineral density and mechanical strength.
Źródło:: Journal of Medical Informatics & Technologies; 2004, 8; MM95-104
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The influence of bone tissue microstructure parameters on bone mineral density parameter computed within the computer simulation process
Autorzy:: Binkowski, M.
Dyszkiewicz, A.
Wróbel, Z.
Powiązania:: https://bibliotekanauki.pl/articles/333857.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: badanie densytometryczne
tkanka kostna
gęstość mineralna kości
mikrostruktury kości
densitometry test
bone tissue
bone mineral density
bone microstructure
simulation of attenuation law
Opis:: The given article was created with reference to lack of correlation between results from densitometry test of bone tissue and its mechanical strength. The changes of bone mechanical strength cannot be solely connected with changes of bone mineral density with micro structural construction of bone tissue. The article describes the research using a computer simulation where changes of physical density and parameters of bone microstructure were modelled. The influences of those parameters for changing the bone mineral density have been computed. It has been calculated during simulation process similar to the way it has been provided from densitometry test. The computation process has been carried out on the basis of computer method of simulation of x-ray radiation propagating through the object and had been was created and tested in the previous research. The model of tested object was defined by spatial high resolution distribution of density. The simulation was executed on a sample of bone tissue. The input data to the model of sample were series of cross-sections obtained previously from micro CT of an animal sample. The changes of parameters were simulated in the model based on a method of 2D image processing. The procedure was used to reduce the trabecular surface for all cross-sections. The results of the algorithm were measured during algorithm process. Images were also analyzed by software to measure parameters of microstructure. It gave a chance to estimate the correlation between measured parameter and parameters of microstructure. The applied method of simulation of attenuation of x-ray radiation allowed to produce densitometry image and to compute parameter similar to bone mineral density. The analysis of obtained results shows how the bone mineral density computed from simulation depends on changes of parameters of microstructure.
Źródło:: Journal of Medical Informatics & Technologies; 2005, 9; 49-55
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The parameters of density and mechanical strength of bone tissue in diagnosis of osteoporosis
Autorzy:: Binkowski, M.
Wróbel, Z.
Dyszkiewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/333991.pdf
Data publikacji:: 2003
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: właściwości mechaniczne tkanki kostnej
rozpoznanie osteoporozy
mikrotwardość
mechanical properties of bone tissue
diagnosis of osteoporosis
microhardness
Opis:: The paper presents results of a study, in which an incomplete correlation between the mineral bone tissue density and patient susceptibility to bone fractures was confirmed. A simple model describing distribution of internal forces present in the microstructure of trabecular bone is proposed. The purpose of this model is to demonstrate that parameters of mechanical strength depend not only on the quantity of mineral material in the bone, but also on the quality of the trabecular structure. In addition, we present the results of cortical and trabecular bone micro hardness test, which are then used to calculate of the modulus of elasticity. Micro-hardness test was performed using Micro-Combi-Tester equipment. Micro-hardness was measured with Vickers diamond; analysis of displacement prosperities was carried out by Olivier and Pharr method. Young's modulus was calculated directly from the resulting unloading curve. Generally, the results for both cortical and trabecular bone tests correspond to the results known from literature. However, depending on localization of the test, slight deviations in modulus of elasticity occur. In conclusion of this research, it is proposed that the dependence between bone mineral density and Young's modulus can be calculated using samples of a normal bone and a bone with changed biomechanical properties. The aim of this research would be to estimate a quantitative coefficient, which would describe differences between mineral bone density and the bone's real density, which is responsible for the immunity to fractures.
Źródło:: Journal of Medical Informatics & Technologies; 2003, 6; IT117-125
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Patency of apertural barriers in clausiliids with different reproductive strategies
Autorzy:: Sulikowska-Drozd, A.
Walczak, M.
Binkowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/84037.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:: Folia Malacologica; 2018, 26, 3
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: X-ray microtomography (XMT) of fossil brachiopod shell interiors for taxonomy
Autorzy:: Blazejowski, B.
Binkowski, M.
Bitner, M.A.
Gieszcz, P.
Powiązania:: https://bibliotekanauki.pl/articles/23513.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: x-ray microtomography
fossil
brachiopod
shell
taxonomy
remains
paleontology
Terebratula terebratula
Opis:: The ability to see and understand the three−dimensional structure of an investigated object plays a key role in studying fossil remains. All living organisms are formed in threedimensions, but unfortunately fossilization processes often reduce overall shape, making it difficult to gather information about real overall appearance, functionality, and inner structure. Here, using a specimen of the brachiopod Terebratula terebratula we demonstrate a non−destructive technique for exploring the 3−D internal structure of fossil remains. The use of tomography allows the construction of a set of transverse serial sections in the manner used by brachiopod researchers for decades.
Źródło:: Acta Palaeontologica Polonica; 2011, 56, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modeling of X-ray propagation in bone microstructure
Autorzy:: Binkowski, M.
Król, Z.
Wróbel, Z.
Zeilhofer, H.-F.
Powiązania:: https://bibliotekanauki.pl/articles/333863.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: mikrotomografia
mikrostruktury kości
tłumienie promieniowania rentgenowskiego
wizualizacja
tomografia komputerowa
erozja
microtomography
X-ray propagation
bone microstructure
attenuation of X-ray radiation
visualization
computed tomography
erosion
Opis:: This paper presents some results concerning the analysis of X-ray propagation through biological structures. We introduce a physical model of the phenomenon and a numerical method based on this model for simulation of X-ray radiation propagation. The proposed method enables generation of radiological projections like those in the computed tomography or microtomography. We have focused our attention on the attenuation of X-ray radiation in bone tissue. Our computational model enables simulation of radiation propagation in the virtual specimen. The virtual bone microstructures used in our experiments are derived from the microtomography datasets of real bone specimens. The main advantage of our approach is that we can change the microstructure of the virtual sample in many ways by using the image processing methods. Results presented in this paper contain simulations of X-ray propagation for modified and unmodified trabecular microstructures as well as the visualization of the radiation intensity distribution for the simulated cases. With this new simulation technique, it is possible for example to analyze the propagation of X-ray radiation for different pathologic types of bone microstructure (e.g. virtually generated osteoporosis).
Źródło:: Journal of Medical Informatics & Technologies; 2005, 9; 75-82
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Differences in trabecular bone mechanical strength measured by the x-ray microcomputed tomography and compressive test
Autorzy:: Binkowski, M.
John, A.
Nowak, R.
Bożek, M.
Bielecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/333606.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: rentgenowska tomografia komputerowa
gęstość mineralna kości
wytrzymałość mechaniczna
x-ray microcomputed tomography
bone mineral density
mechanical strength
Opis:: The article describes the concept of measurement of the mechanical strength of trabecular bone dissected from human femoral head. When the studies are performed based on the human trabecular bone, there is a risk that correlation can be not achieved due to high discrepancy in the distribution of the bone density and mechanical properties. The compressive tests and X-ray microcomputed tomography with associated density phantom were used to deliver quantitative data. There is a conclusion that the selection of the region in the femoral head has to be performed very carefully. The region where cylinder is dissected can influence the results and produce fake data, which could not be correlated in the density of bone.
Źródło:: Journal of Medical Informatics & Technologies; 2010, 15; 163-168
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S$\text{}_{2}$- and T$\text{}_{1}$-States
Autorzy:: Szymański, M.
Balicki, M.
Binkowski, M.
Kubicki, J.
Maciejewski, A.
Pawłowska, E.
Wróżowa, T.
Powiązania:: https://bibliotekanauki.pl/articles/1945389.pdf
Data publikacji:: 1996-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.50.Dq
33.50.Hv
35.80.Be
Opis:: Spectral and photophysical properties of a few aromatic thioketones in their S$\text{}_{2}$- and T$\text{}_{1}$-states, in particular those determined by their interactions with solvents, are discussed. The reasons for a drastically different behaviour of thioketones in interactions with benzene as well as saturated hydrocarbons and perfluoroalkanes are analysed in more detail. Results of the time-resolved transient absorption measurements in the pico- and nanosecond time scale are given. An analysis of these results proves that a product of the decay of the S$\text{}_{2}$-state of xanthione in benzene is a new transient (τ $\text{}_{1}\text{}_{/}\text{}_{e}$ ≥ 60 ps) individuum which, regarding the system properties and the conditions of the experiment, has been identified as an exciplex in S$\text{}_{2}$-state formed as a result of an efficient interaction with benzene molecule. Also in xanthione//alkane systems the involvement of a transient individuum was proved. Most probably, this individuum was a thioketyl radical which could be formed by hydrogen abstraction from a hydrocarbon molecule by xanthione in the S$\text{}_{2}$-state. Such individua act as intermediates in passing excitation to the triplet states of thioketones and are effective channels of the S$\text{}_{2}$-state decay. The changes observed in the transient absorption spectra of xanthione in C$\text{}_{6}$H$\text{}_{6}$ in the time range of 10$\text{}^{-7}$-10$\text{}^{-6}$ s can be attributed to the formation of an excimer in the T$\text{}_{1}$-state as a result of the T$\text{}_{1}$-state selfquenching.
Źródło:: Acta Physica Polonica A; 1996, 89, 4; 527-546
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Problem uszkodzenia iglic łukowych w rozjazdach zwyczajnych
Autorzy:: Czarnecki, M.
Bińkowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/215161.pdf
Data publikacji:: 2018
Wydawca:: Instytut Kolejnictwa
Tematy:: rozjazd kolejowy
iglica rozjazdu
wtrącenia niemetaliczne
naprężenia rozciągające
metoda elementów skończonych
Opis:: W artykule przedstawiono problem nadmiernego zużycia iglic łukowych w rozjazdach kolejowych zwyczajnych, charakteryzujący się wykruszeniem i ubytkiem materiału na pewnej długości w początkowym odcinku iglicy. Problem jest na tyle istotny, że zużycie pojawiło się w rozjazdach na zmodernizowanych liniach kolejowych już po kilkunastomiesięcznej eksploatacji. Na podstawie badań laboratoryjnych przeprowadzonych według norm PN-EN 13674-1:2011 i PN-EN 13674-2+A1:2010 oraz symulacji i analizy wykonanej metodą elementów skończonych (MES) wskazano prawdopodobne przyczyny nadmiernego zużycia iglic w rozjazdach kolejowych.
Źródło:: Problemy Kolejnictwa; 2018, 180; 7-14
0552-2145
2544-9451
Pojawia się w:: Problemy Kolejnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Problem of damage to curved switch rails in ordinary turnouts
Autorzy:: Czarnecki, M.
Bińkowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/952278.pdf
Data publikacji:: 2018
Wydawca:: Instytut Kolejnictwa
Tematy:: railway turnout
turnout switch rail
non-metallic inclusions
tension stresses
finite element method
rozjazd kolejowy
iglica rozjazdu
wtrącenia niemetaliczne
naprężenia rozciągające
metoda elementów skończonych
Opis:: The article presents the problem of excessive wear of curved switch rails in ordinary railway turnouts, which is characterized by spallings and the decrement of material on a certain length of the switch rail near the tip. The problem is important, as such wear arises in turnouts on railway lines after several months of exploitation following modernization. The probable reasons behind the excessive wear of switch rails in railway turnouts are indicated on the basis of laboratory tests performed in accordance with PN-EN 13674-1:2011 and PN-EN 13674-2+A1:2010, as well as on the basis of simulations and analyses carried out by the fi nite element method (FEM).
Źródło:: Problemy Kolejnictwa; 2018, 180; 79-86
0552-2145
2544-9451
Pojawia się w:: Problemy Kolejnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Semen metal profile, spermatozoa morphology and semen biochemical parameters in subfertile men with different lifestyle habits
Autorzy:: Blaszczyk, M.
Toporcerova, S.
Popelkova, M.
Binkowski, L.J.
Semla, M.
Tvrda, E.
Lukac, N.
Massanyi, P.
Stawarz, R.
Powiązania:: https://bibliotekanauki.pl/articles/15805.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2019, 24, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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