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Wyszukujesz frazę "optical microscopy" wg kryterium: Temat


Tytuł:
Evaluation of the quality of titanium oxide and copper oxide layers by means of optical microscopy
Autorzy:
Głuszek, A.
Sawicka-Chudy, P.
Wisz, G.
Sibiński, M.
Cholewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/101772.pdf
Data publikacji:
2018
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
titanium oxide
copper oxide
optical microscopy
histograms
Opis:
The aim of this paper is to analyse high-resolution optical images of the surface layers of titanium oxide and copper oxide. The materials were produced using the PREVAC Modular Platform for layer deposition located at the University of Rzeszów. Images with a magnification of 50x were obtained using an optical microscope. On the basis of the results obtained, the quality of the layers was evaluated based on the image analysis. The quantitative method of analysis was applied, as a result of which the conditions of the manufacturing process for which the obtained layers had the highest homogeneity were indicated. The minimum range of grey shade counting was from 65 to 150 and the maximum range from 135 to 220. The standard deviation was from 8 to 40%.
Źródło:
Energy Policy Studies; 2018, 1 (2); 39-51
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania mikroskopowe ureilitu NWA XXX
Microscopic Investigations of NWA XXX Ureilite
Autorzy:
Szurgot, Marian
Powiązania:
https://bibliotekanauki.pl/articles/1032789.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
extraterrestrial matter
meteorite
meteorites
optical microscopy
ureilite
Opis:
New NWA XXX ureilite found in 2006 was investigated by optical microscopy in reflection and in transmission. Olivines, pigeonite, metal veins and dots, and carbon phases have been revealed and their features and distribution studied. Twinning of pigeonite, reduction rims, and poikilitic inclusions of olivine in large pigeonite crystals have been identified and characterized. NWA XXX meteorite belongs to olivine-pigeonite ureilites.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 138-146
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of factors determinant of siliceous electrical porcelain resistance to structural degradation
Autorzy:
Ranachowski, P.
Ranachowski, Z.
Kudela Jr., S.
Pawełek, A.
Piątkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/351813.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porcelain insulating materials
ageing processes
acoustic emission (AE)
optical microscopy
Opis:
The subject of this study was investigation of the factors that have a decisive influence on the resistance of siliceous porcelain to degradation processes. There was tested material C 110 type, which is widely used for the production of low-voltage (LV) elements such as insulators and bushings. On the basis of mechanical-acoustic and microscopic research of small-sized samples, which were subjected to compression, there were distinguished successive stages of degradation of the material structure. In the authors* opinion, they have a reference to the ageing process, taking place during many years of work under operating conditions. Thus, it was possible to assess the structural factors that determine the durability and reliability of LV electroinsulating elements. The results were related to electrical aluminous porcelains.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1489-1496
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moving-aperture-based three-dimensional micro-measurement system
Autorzy:
Fan, S.
Yu, M.
Jiang, G.
Wang, Y.
Wang, W.
Li, W.
Powiązania:
https://bibliotekanauki.pl/articles/174026.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical microscopy
computational photography
three-dimensional micro-measurement
moving aperture
Opis:
To overcome the depth-of-field limitation of an optical microscope image, a three-dimensional measurement method with a superior depth-of-field is proposed. In the proposed method, light-field information of different angles is obtained by moving the aperture and the three-dimensional scene is reconstructed by using a computational reconstruction technology. First, stereo matching of different aperture position images is performed to obtain the multi-aperture imaging deviation. The focal plane moving distance is thereby estimated. Then, the relational expression between the image coordinates and the focal plane moving distance is determined according to the image coordinates. Two dimensional coordinates of the space point are obtained by the expression coefficients. Finally, the depth coordinates are computed, and three-dimensional reconstruction of the spatial points is completed. Experiments of three-dimensional measurements of the calibration board with different angles and circuit boards are conducted. The results show that the maximum error of the distance measurement is controlled into 0.84%, and the maximum angle measurement error is controlled into 4.56%.
Źródło:
Optica Applicata; 2018, 48, 4; 533-547
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Modified Aluminous Porcelain Subjected to Mechanoacoustic Tests
Autorzy:
Ranachowski, P.
Ranachowski, Z.
Wieczorek, K.
Jaroszewski, M.
Kudela, S. jr.
Powiązania:
https://bibliotekanauki.pl/articles/355059.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrical porcelain materials
ageing processes
acoustic emission
AE
optical microscopy
Opis:
The paper presents the microscopic and mechanoacoustic study of degradation processes of the porcelain material C 130 type. This kind of material is used in the production of the most durable and reliable electrotechnical elements. Raw material composition of the studied porcelain was modified. This had an impact on the inner properties, cohesion and – in consequence – on operational properties of the material. Using mechanical-acoustic and microscopic methods of testing of small-size samples that were subjected to compression, it was possible to distinguish successive stages of degradation of the porcelain structure. These stages were generally typical of the porcelain materials. In the authors’ opinion, they are connected to the ageing process happening over many years of work under operating conditions. Optimization of composition and technological properties – important during technological processes – resulted in a slight decrease in inner cohesion of the porcelain. When compared to the reference material – typical domestic C 130 material, mechanical strength was somewhat lower. Carried out investigations proved that resistance of the investigated material to the ageing degradation process – during long term operation – also decreased. The improvement of technological parameters and the reduction in the number of defective elements occurred simultaneously with some decrease in the operational parameters of the material. To restore their initial high level, further work is needed to optimize the raw material composition of the porcelain.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1821-1826
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrologiczna i mineralogiczna charakterystyka chondrytu węglistego NWA 4967
Petrological and mineralogical characteristics of NWA 4967 carbonaceous chondrite
Autorzy:
Szurgot, Marian
Powiązania:
https://bibliotekanauki.pl/articles/1033012.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
NWA 4967
chondrites
extraterrestrial minerals
meteorites
optical microscopy
petrographic thin sections
Opis:
NWA 4967 carbonaceous chondrite thin section was investigated by optical microscopes in transmission and in reflection. Minerals of the meteorite have been identified and microstructure analyzed. Chondrules, matrix, metal phases, AOAs and CAIs are constituents of the rock, as expected. Olivine, clinopyroxene, orthopyroxene, troilite, kamacite and feldspar have been detected. Various types of chondrules including: PO, POP, PP, RP, BO, C, GOP and GO chondrules were identified. Compositional zoning of some olivines, diagnostic cracks in pyroxenes, clinopyroxene twins, and chondrule rims have been observed and analyzed. Our previous EPMA and Raman data as well as present optical data confirm that NWA 4967 belongs to CO3.2 chondrites, as previously classified.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 121-148
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental analysis by measurement of surface roughness variations in turning process of duplex stainless steel
Autorzy:
Krolczyk, G. M.
Legutko, S.
Powiązania:
https://bibliotekanauki.pl/articles/220659.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
turning
coatings
friction-reducing
optical microscopy
surface roughness analysis and models
Opis:
The objective of the investigation was to identify surface roughness after turning with wedges of coated sintered carbide. The investigation included predicting the average surface roughness in the dry machining of Duplex Stainless Steel (DSS) and the determination of load curves together with roughness profiles for various cutting conditions. The load curves and roughness profiles for various cutting wedges and variable cutting parameters were compared. It has been shown that dry cutting leads to a decrease in friction for lubricated surfaces, providing a small initial contact area where the surface is contacted. The study has been performed within a production facility during the production of electric motor parts and deep-well pumps.
Źródło:
Metrology and Measurement Systems; 2014, 21, 4; 759-770
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Structures Assessment of Some TRIP Steels
Autorzy:
Pantilimon, Mircea Cristian
Berbecaru, Andrei-Constantin
Coman, George
Sohaciu, Mirela G.
Dumitrescu, Ruxandra Elena
Ciucă, Sorin
Gherghescu, Ioana-Arina
Predescu, Cristian
Powiązania:
https://bibliotekanauki.pl/articles/27313868.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
TRIP steel
optical microscopy
Vickers hardness
retained austenite
car body material
Opis:
Automotive industry is constantly interested in building cars made of light and high strength parts in order to reduce the emission levels, the fuel consumption and minimize the effects of a car crash. Some parts may be made of lighter materials, but the steel ones must compensate the strength needed for the car body. Research is made for finding new materials showing high strength combined with high ductility. Among them, transformation - induced - plasticity steels are of great interest, efforts being made to improve their characteristics. A new composition of such a steel is presented, its features being compared with those of three other steels of the same class and category. Optical microscopy at different magnifications is performed, together with Vickers hardness test. Structural particularities are found for each tested steel, justified by their own chemical compositions. The new steel reveals important characteristics: besides the mainly bainitic structure, it has both larger ferritic areas and amounts of retained austenite, making him proper for further study.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 491--498
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical Assessment of the Microstructure of Barite Aggregate from Different Deposits Using X-Ray Microtomography and Optical Microscopy
Autorzy:
Żołek, N.
Ranachowski, Z.
Ranachowski, P.
Jóźwiak-Niedźwiedzka, D.
Kudela, S. jr.
Dvorak, T.
Powiązania:
https://bibliotekanauki.pl/articles/351890.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
barite ore
barite aggregate
microstructure
optical microscopy
thin sections analysis
X-ray tomography
Opis:
Two different barite ore (barium sulfate BaSO4) specimens from different localizations were tested and described in this paper. Analysis of the microstructure was performed on polished sections, and on thin sections using X-ray microtomography (micro-CT), and optical microscopy (MO). Microtomography allowed obtaining three-dimensional images of the barite aggregate specimens. In the tomograms, the spatial distribution of the other polluting phases, empty space as well as cracks, pores, and voids – that exceeded ten micrometers of diameter-were possible to visualize. Also, the micro-CT allowed distinguishing between minerals of different density, like SiO2 and BaSO4. Images obtained and analyzed on thin sections with various methods using the optical microscopy in transmitted light delivered additional information on the aggregate microstructure, i.e. allow for estimation of the different kinds of inclusions (like the different density of the minerals) in the investigated specimens. Above methods, which were used in the tests, completed each another in order to supply a set of information on inclusions’ distribution and to present the important differences of the barite aggregate specimens microstructure.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 697-702
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cast iron component failure: A metallurgical investigation
Autorzy:
Sudhakar, K. V.
Powiązania:
https://bibliotekanauki.pl/articles/382757.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast iron
hardness test
optical microscopy
scanning electron microscopy
fractography
żeliwo
testy twardości
mikroskopia optyczna
mikroskop skaningowy
Opis:
A fractured nutcracker was examined for determining the root cause/s for premature fracture/failure. This is one of the common tools used typically for cracking hard nuts. In this study, metallurgical failure analysis techniques namely, visual inspection, optical microscopy, SEM, and hardness tests were used in investigating the broken product. From the metallurgical analysis, it was determined that the combined effect of low carbon equivalent and presence of inclusions contributed to the sudden fracture of the nut cracking tool.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2s; 67-70
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mikroskopowe metody badania cytoszkieletu
Microscopy techniques for cytoskeleton resarch
Autorzy:
Nowak, Natalia
Pomorski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1033968.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Tematy:
cytoskeleton
electron microscopy
immunocytochemistry
molecular probes
optical microscopy
superresolution microscopy
cytoszkielet
immunocytochemia
mikroskopia elektronowa
mikroskopia optyczna
mikroskopia superrozdzielcza
sondy molekularne
Opis:
Cytoszkielet to sieć białkowych polimerów oraz związanych z nimi setek białek motorycznych, regulatorowych i łączących cytoszkielet z innymi strukturami komórkowymi. Rozwój wiedzy o cytoszkielecie jest nierozerwalnie zwiększany z postępem technik mikroskopowych używanych do jego obserwacji. Początki tych badań to niespecyficzne, nieskomplikowane barwienia utrwalonego materiału biologicznego, które później rozwinęły się w nowoczesną mikroskopię strukturalną, pozwalającą na precyzyjne znakowanie określonych białek tworzących cytoszkielet, badanie ich stanu fizjologicznego czy też oddziaływań cytoszkieletu z luźno związanymi białkami błony czy cytoplazmy. Obecnie możliwe jest nie tylko obrazowanie struktury i funkcji cytoszkieletu ze znacznie lepszą rozdzielczością przestrzenną, ale także prowadzenie tych obserwacji na żywym materiale biologicznym. Z drugiej strony, stabilność cytoszkieletu umożliwia poszukiwanie nowych metod jego obrazowania, co niewątpliwie należy do kół napędowych postępu, jaki dokonał się i wciąż dokonuje się w dziedzinie mikroskopii.
Cytoskeleton is basically a network of protein polymers, but it also contains thousands of motor, regulatory and scaffolding proteins that interact with this network. Discoveries related to the cytoskeleton were strictly connected to the development of microscopy techniques used to observe the cytoskeletal structures. At first, the imaging involved only unspecific, very simple staining of fixed material. Then, the methods evolved into advanced structural microscopy, which enabled accurate detection of specific cytoskeletal proteins, their physiological status, and interactions with loosely bound membrane and cytoplasmic proteins. Today, it is possible not only to visualize the structure and function of the cytoskeleton with better spatial resolution but also to perform the imaging in vivo on live biological specimens. On the other hand, one should also notice that observations of the stable, well defined cytoskeletal structures from their very discovery have continuously stimulated the progress in the microscopy field.
Źródło:
Kosmos; 2018, 67, 1; 219-232
0023-4249
Pojawia się w:
Kosmos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machine learning system for automated blood smear analysis
Autorzy:
Grochowski, Michał
Wąsowicz, Michał
Mikołajczyk, Agnieszka
Ficek, Mateusz
Kulka, Marek
Wróbel, Maciej S.
Jędrzejewska-Szczerska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/220750.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical microscopy
blood cells
biophotonics
image analysis
classification
eigenfaces
neural networks
decision support
nanodiamonds
bioimaging
Opis:
In this paper the authors propose a decision support system for automatic blood smear analysis based onmicroscopic images. The images are pre-processed in order to remove irrelevant elements and to enhancethe most important ones – the healthy blood cells (erythrocytes) and the pathologic ones (echinocytes). The separated blood cells are analysed in terms of their most important features by the eigenfaces method. The features are the basis for designing the neural network classifier, learned to distinguish between erythrocytes and echinocytes. As the result, the proposed system is able to analyse the smear blood images in a fully automatic way and to deliver information on the number and statistics of the red blood cells, both healthy and pathologic. The system was examined in two case studies, involving the canine and human blood, and then consulted with the experienced medicine specialists. The accuracy of classification of red blood cells into erythrocytes and echinocytes reaches 96%.
Źródło:
Metrology and Measurement Systems; 2019, 26, 1; 81-93
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody mikroskopowe w ocenie procesów wykończania wyrobów włókienniczych
Evaluation of finishing processes for textile products using the microscopic methods
Autorzy:
Machnowski, Waldemar
Wrzosek, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1818683.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Skórzanego
Tematy:
mikroskopia optyczna
SEM
skaningowa mikroskopia elektronowa
bawełna
jakość tekstyliów
procesy wykończenia tekstyliów
optical microscopy
scanning electron microscopy
cotton
textiles quality
textile finishing processes
Opis:
Badanie wyrobów włókienniczych odgrywa istotną rolę w systemie zapewnienia jakości tekstyliów, a także w pracach nad rozwojem nowych technologii i produktów włókienniczych. Istnieje wiele metod oceny struktury i właściwości włókien i wyrobów włókienniczych. Bardzo ważne miejsce wśród tych metod zajmują techniki mikroskopowe, w szczególności mikroskopia optyczna i skaningowa mikroskopia elektronowa (SEM). W artykule podano krótki przegląd możliwych zastosowań metod mikroskopowych do analizy efektów niektórych operacji wytwarzania tekstyliów. Wykorzystanie mikroskopu optycznego umożliwiło identyfikację przyczyn powodujących nierównomierność barwy wyrobów bawełnianych. Z przeglądu literatury oraz doświadczeń własnych autorów wynika, że metody mikroskopowe stanowią cenne narzędzie w badaniu włókien i wyrobów włókienniczych.
Fabric testing plays an important role in the quality assurance system and in the development of new textile technologies and products. There are many test methods used to evaluate the structure and properties of fibers and textile materials. Among these methods, microscopic techniques – especially optical microscopy and scanning electron microscopy (SEM) – are one of the most important methods. This paper provides a brief overview of the possible uses the microscopic methods for determining the results of some textile manufacturing processes. A review of the literature and the authors experiences in this field indicate that microscopic methods are a valuable tool for the testing and assessing the performance of fibers and textile products.
Źródło:
Technologia i Jakość Wyrobów; 2020, 65; 4--20
2299-7989
Pojawia się w:
Technologia i Jakość Wyrobów
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-body wear simulation influence on some direct and indirect dental resin biocomposites : A qualitative analysis
Autorzy:
Caracostea, A.
Morar, N.
Florea, A.
Soanca, A.
Badea, M. E.
Powiązania:
https://bibliotekanauki.pl/articles/307539.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mikroskop elektronowy skaningowy
skaningowy mikroskop elektronowy
mikroskop optyczny
system CAD
biokompozyt
scanning electron microscopy
optical microscopy
two-body wear
CAD system
advanced biocomposites
Opis:
Purpose: The aim of this study was to qualitatively assess the outcomes of two in vitro aging methods, thermal-cycling and twobody wear simulation accomplished with a dual-axis chewing device, on the surface characteristics of eight direct and indirect dental resin biocomposites. Methods: Eighty mesial-occlusal-distal dental cavities were restored with four direct nanohybrid composite materials and with four nano- and micro-hybrid lab-fabricated resin composite inlays. After the restored teeth were subjected to thermal-cycling and wear simulation based on mechanical loading, the surface texture features of the restorations were separately analysed for each of the methods, on epoxy resin models using a digital camera, computer-aided-design system, optical stereo-microscopy and scanning electron microscopy. Results: All the dental restorative resin based composites used in this investigation displayed different cyclic wear patterns after undergoing mechanical loading. After thermal-cycling, the group of resin composite inlays showed a better adaptation, a smoother and more polished occlusal surface compared with direct restorative materials. Only two of direct nanohybrid resin composites performed better after two aging methods. One nanohybrid and the other two microhybrid resin inlays did not perform as expected when they were subjected to simulated wear compared to the rest of test materials. Conclusions: The use of the two-body wear simulation method revealed important information about the behavior of the dental resin-based composites when multiple oral factors are involved in a lab-simulated condition. Furthermore, the macro- and micro-morphological analysis showed different abrasion patterns among the materials being tested according to the filler percentage and distribution of the particles within the resin matrix.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 3; 61-72
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Understanding technical cleanliness: importance, assessment, maintenance
Autorzy:
Faber, Joanna
Brodzik, Krzysztof
Nycz, Marta
Powiązania:
https://bibliotekanauki.pl/articles/2097549.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
technical cleanliness
component cleanliness code
contaminations
particles
optical microscopy
SEM
scanning electron microscopy
czystość techniczna
kod czystości komponentu
zanieczyszczenia
cząstki
mikroskopia optyczna
skaningowa mikroskopia elektronowa
Opis:
Development of the automotive industry, including so-called dowsizing and rightsizing, entails the need to ensure, and hence to verify, the stringent cleanliness levels of an increasing number of car components. The assurance of proper cleanliness level requires knowledge of the entire production process and precise information on the contaminants that will allow to identify their sources. Obtaining reliable cleanliness information requires establishing of many different factors, i. a. selection of proper contamination extraction and collection technique, proper parameters of extraction, validation of extraction procedure, methods of particles analysis. Analytical techniques which are implemented include gravimetric, optical microscopy and advanced techniques like scanning electron microscopy. This work present’s actual state of knowledge regarding technical cleanliness analysis of components. Important aspects of QA&QC in technical cleanliness assessment are also discussed.
Źródło:
Combustion Engines; 2021, 60, 3; 41--50
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł

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