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Tytuł:
The application of X-Ray Computed Microtomography for estimation of petrophysical parameters of reservoir rocks
Autorzy:
Kułynycz, Vitalij
Maruta, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1179531.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
computer microtomography
petrophysical parameters
reservoir rocks
Opis:
In the reservoir geology, X-Ray microtomography (micro-CT) is mainly used for three-dimensional visualization of minerals and rocks. For rock sample testing, micro-CT technology enables quantitative measurements of the internal structure of rock material in a precise and non-destructive manner and, above all, allows accurate measurements of the spatial pore system. By using this method, you can get detailed information about porosity: it is possible to measure the length and number of channels pore, tracing their connections, visualization and quantitative assessment of their tortuosity and permeability, observing the penetration of water or oil in the rock, analyzing the degree of filling the pores of the rock different media and imaging and analysis of the wettability process. With this method you can also get a permeability analysis (in three orthogonal directions), estimate the fracture and hydraulic conductivity of the rock medium [1]. The paper discusses the method of X-Ray microtomography, presents data acquisition and reconstruction of the internal structure of reservoir rocks for hydrocarbons. The results of research on petrophysical parameters of Polish reservoir rocks and global oil and gas deposits were presented using a modern research method, based on the literature review of micro-CT method.
Źródło:
World Scientific News; 2017, 76; 91-107
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osmotic dehydration and freezing as a suitable pretreatment in the process of vacuum drying kiwiberry: drying kinetics and microstructural changes
Autorzy:
Bialik, M.
Wiktor, A.
Witrowa-Rajchert, D.
Samborska, K.
Gondek, E.
Findura, P.
Powiązania:
https://bibliotekanauki.pl/articles/2082900.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Actinidia arguta
X-ray microtomography
mathematical modelling
drying kinetics
Opis:
This study investigated the effects of osmotic dehydration and freezing on the kinetics and microstructure of vacuum-dried kiwiberry. Both fresh and previously frozen fruit were dehydrated in sucrose, maltitol and xylitol. Freezing and osmotic dehydration were selected as possible ways to improve the drying kinetics and positively influence the taste of the fruit. This experiment focused on the analysis of microstructural changes induced by applied processing methods using the X-ray microtomography technique. The results showed that the fruit pretreated in sucrose suffered the least structural damage as expressed by the largest condensation of small pores and thin cell walls. Freezing and xylitol resulted in the accumulation of larger pores and thicker walls. The most rapid drying time of 678-688 min was observed for unfrozen samples, dehydrated in sucrose and maltitol. Freezing slowed down the drying process, by 60-100 min, in comparison to the unfrozen samples. The applied mathematical models proved useful in predicting the kinetics of the drying process. The equation proposed by Midilli et al. provided the best fit for predicting the kinetics of the process.
Źródło:
International Agrophysics; 2020, 34, 2; 265-272
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray micro computed tomography characterization of porosity in Rotliegend sandstones on the northern slope of the Wolsztyn Ridge, western Poland
Autorzy:
Poszytek, A.
Mikołajewski, Z.
Dohnalik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060542.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Rotliegend
lithologic traps
sandstones
porosity
Wolsztyn Ridge
computed microtomography
Opis:
Natural gas in the Polish Rotliegend Basin occurs in porous and permeable aeolian sandstones, and traps are mostly structural. Lithological traps are rare and occur on the northern slope of the Wolsztyn Ridge where fluvial and aeolian sandstones overlap with alluvial facies. Both fluvial and aeolian sandstones are reservoir rocks in this area. The X-ray micro computed tomography (MCT) results and microscopic observations indicate that the sandstones in lithologic traps on the northern slope of the Wolsztyn Ridge form highly compartmentalized vertical reservoir rocks composed of four types of sandstones. The profiles are dominated by very low-porosity fluvial sandstones (F2), and low-porosity aeolian and fluvial sandstones (A2, F1). The A1 type of sandstones with high porosity (10%) occurs only in some sections of the profiles. The most important diagenetic processes that reduced porosity were compaction and cementation by carbonate cements. All studied sandstones were subjected to the same diagenetic processes. However, each of the processes ran with varying intensity in different types of sandstones. Detailed analyses of pore distribution by MCT methods with respect to primary depositional or lithofacies effects, and secondary diagenetic effects, help to understand the 3D geometry of pores and pore shape-size distributions. The results can be used in the studies of other sandstones with a different origin and age.
Źródło:
Geological Quarterly; 2016, 60, 4; 801-810
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Micro Computer Tomography to Identification of Pore Structure Parameters of Porous Materials
Autorzy:
Szczepański, Z.
Cieszko, M.
Gadzała, P.
Zych, G.
Powiązania:
https://bibliotekanauki.pl/articles/115469.pdf
Data publikacji:
2010
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
volume porosity
bone tissue
computed microtomography
mCT
binarization
voxels
thresholding
microscopic
Opis:
The purpose of this paper is to apply the scans of microscopic geometry of human bones obtained by Micro Komputer Tomography method to identifi cation of their macroscopic pore structure parameters: volume porosity, permeability and tortuosity of pores and skeleton. These parameters, except the volume porosity, have been determined by simulations of microscopic processes of viscous fl uid fl ow and electrical current passage through virtual models of bones samples. The simulations wave performed using the COMSOL’s Multiphysics environment assigned for solution of boundary value problems described by partial diff erential equations, by use of the fi nite element method.
Źródło:
Challenges of Modern Technology; 2010, 1, 1; 90-91
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Saurichthys (Pisces, Actinopterygii) teeth from the Lower Triassic of Spitsbergen, with comments on their stable isotope composition (δ13C and δ18O) and X−ray microtomography
Autorzy:
Błażejowski, Błażej
Duffin, Christopher J.
Gieszcz, Piotr
Małkowski, Krzysztof
Binkowski, Marcin
Walczak, Michał
McDonald, Samuel A.
Withers, Philip J.
Powiązania:
https://bibliotekanauki.pl/articles/2051411.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
fish teeth
stable isotopes
x−ray microtomography
Lower Triassic
Źródło:
Polish Polar Research; 2013, 1; 23-38
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Root Canal System Analysis with a Group of First Permanent Molars of Upper and Lower Jaw
Analiza systemu kanałowego w pierwszych zębach trzonowych szczęki i żuchwy
Autorzy:
Mroczek, K.
Szlązak, K.
Jodkowska, E.
Święszkowski, W.
Kurzydłowski, K.J.
Powiązania:
https://bibliotekanauki.pl/articles/355703.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
endodontics
root canal system configuration
microtomography
endodoncja
konfiguracja kanałów korzeniowych
mikrotomografia
Opis:
A progressive bacteria invasion on tooth tissues leads to pulp inflammation, microabscesses of the pulp, destruction and in consequence inflammation of periapical tissues. Therefore the aim of endodontic treatment is three dimensional debridement of a root canal from the vent in pulp chamber to the physiological narrowing. Therefore the aim of the study is analysis of root canal configuration, number of canals, presence of lateral canals and canal delta with the group of first permanent molars. At the same time the accuracy of the radiological examination (x-ray images) is estimated due to comprehension of X-ray images performed before teeth preparation with root canal system and after observation of transversal cuts by means of light microscopy and microtomography. This establishment is presented through the differences in conventional radiological image and clinical assessment.
Postępująca inwazja bakteryjna w tkankach zęba prowadzi do zapalenia miazgi, powstawania w niej mikroropnii, zniszczenia a w konsekwencji do zapalenia ozębnej. Z tego względu celem leczenia endodontycznego stało się trójwymiarowe oczyszczenie kanału korzeniowego od jego ujścia do przewężenia fizjologicznego. Dlatego celem pracy jest analiza konfiguracji, ilości kanałów korzeniowych, istnienia kanałów bocznych oraz delty korzeniowej w grupie pierwszych zębów trzonowych stałych w uzębieniu ludzkim. Jednocześnie ocenie poddawana jest dodatkowo swoistość badania radiologicznego (zdjęcia zębowe), poprzez porównanie zdjęć rentgenowskich wykonanych przed preparacją zębów z obrazem systemu kanałowego uzyskanego na podstawie mikrotomografii oraz po wykonaniu szlifów poprzecznych i ich obserwacji na mikroskopie świetlnym. Celem tej oceny jest zaprezentowanie rozbieżności pomiędzy oceną radiologiczną systemu kanałowego a kliniczną.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 2; 629-632
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the carbonation zone in concrete using X-ray microtomography
Autorzy:
Łydżba, D.
Rajczakowska, M.
Stefaniuk, D.
Kmita, A.
Powiązania:
https://bibliotekanauki.pl/articles/178832.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
concrete
carbonation zone
X-ray microtomography
beton
strefa karbonatyzacji
mikrotomografia rentgenowska
Opis:
The article presents an application of X-ray microtomography for identification of the carbonation zone in concrete material. A concrete specimen subjected earlier to harsh environmental conditions is investigated. The material is firstly checked with the use of chemical corrosion indicators and then is subjected to microstructural analysis performed with the use of X-ray microtomography. Two different settings of scanning parameters are applied implying the image resolutions of approximately 14 μm per 1 pixel and about 7 μm per 1 pixel, respectively. The results obtained are then compared and analyzed. The depth of the carbonation zone is evaluated based on the attenuation curve. The paper highlights also the significance of the corrosion phenomenon in concrete structures. Details of the deterioration mechanisms in concrete are shortly presented.
Źródło:
Studia Geotechnica et Mechanica; 2014, 36, 1; 47-54
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray microtomography (μCT) as a useful tool for visualization and interpretation of shear strength test results
Autorzy:
Stefaniuk, D.
Tankiewicz, M.
Stróżyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/178870.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
X-ray microtomography
shear strength
shear plane
fine-grained soil
triaxial test
Opis:
The paper demonstrates the applicability of X-ray microtomography (μCT) to analysis of the results of shear strength examinations of clayey soils. The method of X-ray three-dimensional imaging offers new possibilities in soil testing. The work focuses on a non-destructive method of evaluation of specimen quality used in shear tests and mechanical behavior of soil. The paper presents the results of examination of 4 selected clayey soils. Specimens prepared for the triaxial test have been scanned using μCT before and after the triaxial compression tests. The shear strength parameters of the soils have been estimated. Changes in soil structure caused by compression and shear failure have been presented as visualizations of the samples tested. This allowed for improved interpretation and evaluation of soil strength parameters and recognition of pre-existing fissures and the exact mode of failure. Basic geometrical parameters have been determined for selected cross-sections of specimens after failure. The test results indicate the utility of the method applied in soil testing.
Źródło:
Studia Geotechnica et Mechanica; 2014, 36, 4; 47-55
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of bone volume porosity based on histograms of the mCT scans
Autorzy:
Gadzała, P.
Szczepański, Z.
Zych, G.
Powiązania:
https://bibliotekanauki.pl/articles/115459.pdf
Data publikacji:
2010
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
volume porosity
bone tissue
computed microtomography
mCT
histogram
probability distribution
voxels
thresholding
microscopic
Opis:
The new method is proposed in the paper for determination of volume porosity of bone tissue based on histograms of 3D mCT scans and also precise defi nition of the threshold value of relative density preserving calculated volume porosity during the reconstruction of the binary image of sample. In this method the normed histogram is considered as a probability distribution of relative mass density in the bone sample. It was shown that the normed histograms of increasing 3D sample are convergent to the limit curve which can be interpreted as a representative histogram of given sample. The limit histograms have been used to determine: the distributions of relative densities in the sets of voxels of pore and skeleton type and their characteristics, the volume porosities of both samples and thresholds values of their binarisation.
Źródło:
Challenges of Modern Technology; 2010, 1, 1; 88-89
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-invasive analysis and visualization of objects from FSW AlSi9Mg/2017A aluminum alloy joints
Nieinwazyjna analiza i wizualizacja obiektów w złączach AlSi9Mg/2017A wytwarzanych metodą Friction Stir Welding
Autorzy:
Wójcicka, A.
Mroczka, K.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/264301.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
X-ray microtomography
image analysis
aluminum alloys
FSW
mikrotomografia komputerowa
analiza obrazów
stopy aluminium
Opis:
Friction stir welding (FSW) technology allows for the welding of materials that differ in their chemical compositions, microstructures, and properties. When selecting the parameters, it is necessary to analyze the structure of a weld and eliminate the defects. The use of X-ray microtomography creates the possibility of precise imaging of a joint structure – especially when it contains defects (voids). The tests were carried out on an FSW joint made with both 2017A and AlSi9Mg aluminum alloys. The macrostructure was cross-sectional, and a defect was found in the middle part of the joint and on the advancing side. We used a conventional method of observation light microscopy. Then, an analysis was performed using X-ray microtomography, which revealed the shape of the defect in 3D. Individual cross-sections were extracted, which enabled us to measure the geometric quantities. A dependence was found for the shape of the defect on the welding parameters and the variability of its construction. The usefulness of this advanced material imaging technology for the analysis of FSW welds has been confirmed.
Technologia FSW umożliwia zgrzewanie materiałów różniących się składem chemicznym, mikrostrukturą i właściwościami. Przy doborze parametrów konieczna jest analiza struktury złącza i eliminacja ewentualnych wad. Zastosowanie mikrotomografii komputerowej umożliwia precyzyjne obrazowanie budowy złącza, szczególnie gdy zawiera wady (pustki). Badania przeprowadzono na złączu FSW stopów aluminium 2017A i AlSi9Mg. Zbadano makrostrukturę na przekroju poprzecznym i stwierdzono obecność wady w środkowej części złącza i po stronie natarcia. Zastosowano konwencjonalną metodę obserwacji – mikroskopię świetlną. Następnie wykonano analizę złącza z zastosowaniem tomografii komputerowej, która ujawniła kształt wady w wymiarze 3D. Wyekstrahowano poszczególne przekroje, które umożliwiły wykonanie pomiarów wielkości geometrycznych. Stwierdzono zależność kształtu wady od parametrów zgrzewania oraz zmienność jej budowy. Potwierdzono przydatność tej zaawansowanej technologii obrazowania budowy materiałów do analizy złącz FSW.
Źródło:
Metallurgy and Foundry Engineering; 2018, 44, 3; 145-152
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Co-Cs-Nd-Sr-Doped Perovskite-Rutile-Type Structure
Autorzy:
Smolinski, T.
Zhao, L.
Rogowski, M.
Wawszczak, D.
Olczak, T.
Brykala, M.
Powiązania:
https://bibliotekanauki.pl/articles/355628.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Synroc
X-ray diffraction
Rutherford backscattering
particle induced X-ray emission
Roentgen computed microtomography
Opis:
The perovskite type matrix is considered as solidification material for high-level radioactive waste. In this work the perovskite-rutile-type matrix doped by Co, Cs, Nd and Sr which simulate nuclear waste was prepared by sol-gel route. The material was characterized by several methods such as: X-ray diffraction, energy dispersive X-ray spectrometer, and particle induced X-ray emission combined with Rutherford backscattering spectrometry. The analyzes confirmed chemical composition Co-Cs-Nd-Sr-doped perovskite-rutile-type structure. A virtual model of the pellet`s structure was created non-destructively by Roentgen computed micro-tomography. The leaching tests confirmed high chemical resistance of the matrix.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1417-1423
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of X-ray computed microtomography for graptolite detection in rock based on core internal structure visualization
Autorzy:
Kaczmarek, Ł.
Kozłowska, A.
Maksimczuk, M.
Wejrzanowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/139097.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computed microtomography
visualization
graptolites
Silurian
Baltic Basin shale
mikrotomografia komputerowa
wizualizacja
graptolity
sylur
łupki basenu bałtyckiego
Opis:
This paper presents for the first time X-ray computed microtomography (μCT) analysis as a technique for Silurian graptolite detection in rocks. The samples come from the Jantar Bituminous Claystones Member of the Opalino core, Baltic Basin, northern Poland. Images were obtained with spatial resolution of 25 μm, which enabled the authors to create a 3-D visualization and to calculate the ratio of fissure and graptolite volume to the total sample volume. A set of μCT slices was used to create a 3-D reconstruction of graptolite geometry. These μCT slices were processed to obtain a clearly visible image and the volume ratio. A copper X-ray source filter was used during exposure to reduce radiograph artifacts. Visualization of graptolite tubaria (rhabdosomes) enabled Demirastrites simulans to be identified. Numerical models of graptolites reveal promising applications for paleontological research and thus for the recognition and characterization of reservoir rocks.
Źródło:
Acta Geologica Polonica; 2017, 67, 2; 299-306
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and surface topography of Ti6Al4V lattice structure fabricated by selective laser sintering
Autorzy:
Maszybrocka, J.
Stwora, A.
Gapiński, B.
Skrabalak, G.
Karolus, M.
Powiązania:
https://bibliotekanauki.pl/articles/202149.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal porous implant
selective laser sintering
surface roughness
X-ray microtomography
selektywne spiekanie laserowe
chropowatość powierzchni
Mikrotomografia
Opis:
Construction of metallic implants with a porous structure that mimics the biomechanical properties of bone is one of the challenges of orthopedic regenerative medicine. The selective laser sintering technique (SLS) allows the production of complex geometries based on three-dimensional model, which offers the prospect of preparing porous metal implants, in which stiffness and porosity can be precisely adjusted to the individual needs of the patient. This requires an interdisciplinary approach to design, manufacturing and testing of porous structures manufactured by selective sintering. An important link in this process is the ability to assess the surface topography of the struts of porous structure. The paper presents a qualitative assessment of the surface morphology based on SEM studies and methodology that allows for quantitative assessment of stereometric structure based on micro-tomographic measurements.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 85-92
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problem of the objects detection on low quality 3D image – example solution
Autorzy:
Gądek-Moszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/114988.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
image processing
low contrast
noise
X-ray microtomography
przetwarzanie obrazu
hałas
mikrotomografia rentgenowska
redukcja szumów
poprawa kontrastu
Opis:
Precise detection of analyzed objects is crucial and the most important task in quantitative and qualitative image of the microstructure analysis. The most common image distortion is noise, artefacts and low contrast. In the paper, author on the example of poor quality image of the polyurethane-polystyren composite structure, obtained with the X-ray microtomograph, presented possible methods of noise reduction, contrast enhancement, and correction of detection errors on the binary image.
Źródło:
Zeszyty Naukowe. Quality. Production. Improvement; 2017, 1 (6); 134-141
2544-2813
Pojawia się w:
Zeszyty Naukowe. Quality. Production. Improvement
Dostawca treści:
Biblioteka Nauki
Artykuł
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