Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "three-dimensional" wg kryterium: Temat


Tytuł:
Cytotoxicity of three-dimensional paper-based models from a three-dimensional paper-based printer
Cytotoxicité des modèles tridimensionnels imprimés en papier
Autorzy:
Kozakiewicz, Marcin
Szymor, Piotr
Olszewski, Raphael
Powiązania:
https://bibliotekanauki.pl/articles/2129266.pdf
Data publikacji:
2018-08-26
Wydawca:
Presses Universitaires de Louvain
Tematy:
cytotoxicité; stérilisation; impression 3D
imprimante 3D
cytotoxicity; sterilization; three-dimensional printing, three-dimensional printer
Opis:
Objective: Our study aimed to determine the possibility of using models created with a low-cost, paper based 3D printer in an operating room. Therefore influence of different methods of sterilization on models was tested and cytotoxicity of generated models was determined. Material and methods: 30 cuboids divided into three groups were used for verification of shape stability after sterilization. Each group was sterilized either with: Ethylene oxide in temperature 55˚C, Hydrogen peroxide gas plasma in temperature 60˚C or Gamma irradiation at 21˚C, 25kGy. Each cuboid was measured using calliper three times before and three times after sterilization. Results were analysed statistically in Statgraphics Plus. Statistical significance was determined as p< 0.05. Sixty cylinders divided into six groups were used for cytotoxicity tests. Three of those groups were covered before sterilization with 2-octyl-cyanoacrylate. Each group was sterilized with one of the previously described methods. Cytotoxicity was tested by Nanostructural and Molecular Biophysics Laboratory in Technopark Lodz using normal adult human dermal fibroblasts. Survival of cells was tested using spectrophotometry with XTT and was defined as ratio of absorbency of tested probe to absorbency of control probe. Calcein/Ethidium dyeing test was performed according to LIVE/DEAD Viability/Cytotoxicity Kit protocol. Observation was done under Olympus GX71 fluorescence microscope. Results: There was no statistically significant difference for established statistical significance p=0.05 in cuboids dimensions before and after sterilization regardless of sterilization method. In XTT analysis all samples showed higher cytotoxicity against normal, human, adult dermal fibroblast culture when compared to positive control. ANOVA statistical analysis confirmed that 2-octyl cyanoacrylate coating of paper model improved biological behaviour of the material. It decreased cytotoxicity of the model independently of sterilization method. In calcein/ethidium dyeing test due to the high fluorescence of the background caused by cylinders of analysed substance it was impossible to perform the exact analysis of the number of marked cells. Conclusions: Acquired results allow to conclude that Mcor Technology Matrix 300 3D paper-based models can be used in operating room only if covered with cyanoacrylate tissue adhesive. Nemesis relevance: We found no statistically significant difference in cuboids dimensions before and after sterilization regardless of sterilization method. Three-dimensional paper-based models present with high cytotoxicity without coating.
Objectif: Notre étude consistait à déterminer s'il était possible d'utiliser en salle d'opération des modèles tridimensionnels (3D) issus d’une imprimante tridimensionnelle utilisant du papier. Pour cela nous avons testé l'influence de différents types de stérilisation sur les modèles ainsi que la cytotoxicité des modèles imprimés en papier.  Matériel et méthodes: 30 cubes divisés en trois groupes ont été utilisés pour vérifier la stabilité de la forme après la stérilisation. Chaque groupe a été stérilisé avec: l’oxyde d'éthylène à 55˚C, peroxyde d’hydrogène à 60˚C et irradiation aux rayons gamma à 21˚C, 25kGy. Chaque cube a été mesuré avec un pied à coulisse trois fois avant et trois fois après la stérilisation. La signification statistique a été établie à p< 0.05. Soixante cylindres, divisés en trois groupes, ont été utilisés pour les tests de cytotoxicité. Trois de ces groupes ont été couverts, avant la stérilisation, avec du 2-octyl-cyanoacrylate. Chaque groupe a été stérilisé avec une des méthodes de stérilisation décrite ci-dessus. La cytotoxicité a été testée en utilisant des fibroblastes dermiques humains adultes normaux. La survie des cellules a été testée en utilisant la spectrophotométrie avec XTT. L’observation a été réalisée avec le microscope à fluorescence Olympus GX71. Résultats: Il n’y avait pas de différence significative dans les dimensions des cubes avant et après la stérilisation et ce pour les trois méthodes de stérilisation. Avec l’analyse XTT tous les échantillons ont démontré une cytotoxicité supérieure par rapport à une culture de fibroblastes dermiques humains adultes normaux de contrôle. L’analyse statistique ANOVA a confirmé que l’enrobage avec du 2-octyl cyanoacrylate des modèles papier améliorait le comportement biologique du matériau. Cet enrobage réduisait la cytotoxicité du modèle indépendamment de la méthode de stérilisation. Conclusions: les modèles 3D à base du papier 3D issus de l’imprimante Mcor Technology Matrix 300 peuvent être utilisés dans la salle d’opération seulement s’ils sont enrobés avec la colle biologique à base de cyanoacrylate. Rapport avec Nemesis: Nous n’avons pas trouvé de différence significative des dimensions des cubes avant et après la stérilisation indépendamment de la technique de stérilisation utilisée. Les modèles 3D à base du papier présentent une haute cytotoxicité cellulaire sans enrobage.
Źródło:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery; 2018, 3, 1; 1-15
2593-3604
Pojawia się w:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on vertical displacements of an experimental section of a railway track with a spatial mat reinforcement
Autorzy:
Zamiar, Zenon
Surowiecki, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1961877.pdf
Data publikacji:
2021-12-30
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
three-dimensional mat
ground reinforcement
field tests
Opis:
The subject of the article are the layers strengthening the base of the railway track, used in special cases of modernization of the main lines on the Polish State Railways. The construction of a three-dimensional reinforcing mat, also known as a "mattress", is presented. The reinforcing "mattress" is a layer of stone aggregate pre-compressed in an openwork coating made of plastic mesh. The results of the research on vertical displacements of the experimental section established in the railway track with a spatial mat embedded in the substrate are discussed. Vertical displacements were obtained as a function of time in the track subjected to the operation process.
Źródło:
Logistics and Transport; 2021, 51-52, 3-4; 179-192
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Polish adaptation of Monika Ardelt’s Three-Dimensional Wisdom Scale (3D-WS)
Autorzy:
Steuden, Stanisława
Brudek, Paweł
Izdebski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2127729.pdf
Data publikacji:
2019-04-06
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
wisdom
Polish adaptation
Three-Dimensional Wisdom Scale
Opis:
The article outlines the results of academic endeavors to develop a Polish adaptation of Monika Ardelt’s Three-Dimensional Wisdom Scale (3D-WS). The results obtained using the Polish version are comparable to those obtained using the original research instrument, which proves that the Polish 3D-WS can be successfully used for research purposes. The Polish adaptation consists of 39 items covering four dimensions: Cognitive, Affective, Self-Awareness, and Empathic. The scale testing procedure involved a research sample consisting of 475 people. The Cronbach’s alpha coefficient was .83 for the entire scale and oscillated between .64 and .77 for the subscales. Over the course of the study, it turned out that some subscales of the Polish 3D-WS can be influenced by sociodemographic factors such as age, sex, and education.
Źródło:
Roczniki Psychologiczne; 2016, 19, 4; 769-792
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Volume-spatial compositions of buildings poltava of the late nineteen – early twenty centuries
Autorzy:
Savchenko, Tetiana
Powiązania:
https://bibliotekanauki.pl/articles/1836688.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
three-dimensional composition
frontal construction
compositional scheme
Opis:
The article presents studies of the formation patterns of the buildings composition in Poltava in the late 19th – early 20th centuries. The main types of volume-spatial compositions and factors that influenced its formation are identified: urban (location in the system of urban development), and functional (typology of buildings). The means of organization of the volume-spatial structure of the buildings of Poltava have been studied.
Źródło:
Przestrzeń i Forma; 2020, 44; 143-162
1895-3247
2391-7725
Pojawia się w:
Przestrzeń i Forma
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a Web-Augmented Reality application for demonstration of kidney pathology for veterinary education
Autorzy:
Atmaca, H.T.
Terzi, O.S.
Powiązania:
https://bibliotekanauki.pl/articles/2087089.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
veterinary pathology
education
three dimensional
Augmented Reality
kidney
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 3; 345-350
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Vertical Variations of Wave-Induced Radiation Stress Tensor
Autorzy:
Chybicki, W.
Powiązania:
https://bibliotekanauki.pl/articles/241081.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
radiation stress
linear water waves
three-dimensional flow
Opis:
The flux of momentum generated by an incident wave field, commonly known as the radiation stress, plays an important role in near-shore water circulation. Many researchers use the concept of radiation stress in the calculation of cross-shore and long-shore circulation. In this paper, the traditional concept is extended to the case of vertical variation of radiation stress, and analitycal expressions for the vertical profile of radiation stress are derived. The distributions of the wave-induced radiation stress tensor with depth are studied by linear wave theory. The application of radiation stress with vertical variation is expected to play an important role in further studies of the near-shore system. Information regarding the vertical distribution of the radiation stress components ( and ) resulting from obliquely incident, shoaling waves is provided. The results show that the vertical variations of the wave-induced radiation stress tensor are significant as regards of wave propagation.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2008, 55, 3-4; 83-93
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability estimation of slopes having their slip surface determined by means of the STAB-3D method based on sliding body equilibrium analysis
Autorzy:
Ukleja, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059940.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
slope stability
three-dimensional analysis
layered soils
safety
landslides
Opis:
Most of the three-dimensional analyses of landslides are based on simple 2D methods analysing chosen characteristic flat sections of the analysed sliding body. Assumptions of the method of flat limit equilibrium analysis for a spatial solution have been elaborated. This is a combination of 2D analysis of flat sectional views and 3D analysis of the landslide’s sliding body, which disregards any stress that does not affect equilibrium. It is assumed, however, to apply only when dealing with structural slope failure (i.e. when the soil layers have the predisposition to shape the determined slip surface with a consistent decrease and explicit slide direction). This can also apply when examining the stability of a scarp or slope for the layered soil of potential slip surfaces and slide direction to be defined. The basic assumptions, equilibrium equations, and practical usage of the method have been described for an exemplary landslide. This method allows one to define in a straightforward manner the stability of slopes, to plan a way of preventing potential landslides, and to control those that have already arisen.
Źródło:
Geological Quarterly; 2016, 60, 3; 597--609
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistic staff managment - ant algorithm for the optimal team creation
Autorzy:
Schiff, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/409194.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
logistic staff management
three dimensional matching problem
ant colony
Opis:
During daily logistic management managers often met difficult decision optimization problem concerning company staff. Such problems often rely on matching workers between them and team leader or matching worker to a place and a time slot and often they, menagers want to optimise their resources in order to receive such matches as maximum as possible as regars a cardinality number of a such set. These optimisation problem are often NP-difficults and to solve them menagers need special software tools. To aid managers in such situation artificial methods are used. Between artificials methods is a one called the ant colony optimisation algorithm and why in this article an ant colony optimization algorithm for the maximum cardinality 3-dimensional matching problem is described. The problem is modeled by means of 2-dimensional arrays. The elaborated ant algorithm was compared with another existing ant algorithm and tested for different values of ant algorithm parameters. Results of these tests were presented and discussed. The elaborated algorithm shows its superiority.
Źródło:
Research in Logistics & Production; 2019, 9, 1; 49-59
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-dimensional reconstruction and morphometric analysis of the mandible in Van cats: A computed tomography (CT) study
Autorzy:
Yilmaz, O.
Demircioglu, İ.
Powiązania:
https://bibliotekanauki.pl/articles/2087193.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computed tomography
mandible
morphometry
three-dimensional reconstruction
Van cat
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 2; 261-270
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
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:
The Method of Transferring Topology Optimization Results Directly to the CAD System Database
Autorzy:
Łyduch, Konrad
Łukaszyk, Jacek
Nowak, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2022380.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
topology optimization
CAD
transferring results
three-dimensional structures
automated system
Opis:
The article presents a method of transferring topological optimization results directly to CAD system. The devel- oped method is based on sequential removal and addition of material, ignoring lesser fragments of the model. The input data includes coordinates of nodes imported from the model of finite element method optimized object. The algorithm is able to recognize geometry patterns during material addition and subtraction. Based on the results of the recognition process, individual 3D features are placed in CAD design tree (like „Feature Manager” design tree in Solidworks, used in the procedure described in the article below). Thus, the described algorithm allows for convenient and quick editing of transferred geometry of the optimized object directly in the CAD environment. The algorithm was tested on various examples of 2D and 3D models. The execution code of the presented method was written in Python programming language, and the macro for the CAD program was written in VB.NET. The proposed solution is independent of the optimizer used.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 243-252
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie 3D w projektowaniu konserwatorskim
3D modelling in conservation designs
Autorzy:
Bil, J.
Powiązania:
https://bibliotekanauki.pl/articles/217337.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Konserwatorów Zabytków
Tematy:
digitalizacja
wirtualizacja
modelowanie
obiekt trójwymiarowy
digitalisation
modelling
three-dimensional object
Opis:
Przełom wieków XX i XXI to początek nowej ery technologii i informatyki. Rozwój tych dziedzin znacząco wpłynął na możliwości i zakres ochrony dziedzictwa kulturowego. Możliwości zapisu cyfrowego stworzyły wirtualny świat, którego częścią stały się m.in. obiekty zabytkowe. W artykule został opisany proces digitalizacji i modelowania architektonicznych obiektów zabytkowych. Autor opisuje możliwości i sposoby wykorzystania oprogramowania niezbędnego do tworzenia trójwymiarowych obiektów wirtualnych wykorzystywanych w procesie projektowania konserwatorskiego. Przedstawia podstawowe zasady oraz narzędzia niezbędne do definiowania przestrzeni wirtualnej.
The turn of the 20th and 21st century was the beginning of a new era of technology and computer science. The development of those disciplines significantly influence the possibilities and range of cultural heritage protection. The possibility of digital recording created a virtual world, which encompassed e.g. historic monuments as its part. The article describes the process of digitalising and modelling architectonic objects of historical value. The author describes the possibilities and ways of using the software indispensable for creating three-dimensional virtual objects used in the process of conservation designing, and presents the essential principles and tools necessary to define virtual space.
Źródło:
Wiadomości Konserwatorskie; 2012, 31; 104-109
0860-2395
2544-8870
Pojawia się w:
Wiadomości Konserwatorskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualization of a lifeboat motion during lowering along ship’s side
Autorzy:
Kniat, A.
Powiązania:
https://bibliotekanauki.pl/articles/260135.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
three-dimensional visualization
kinematics
computer animation
lifeboat lowering
numerical simulations
Opis:
This paper presents description of a computer program for motion visualization of a lifeboat lowered along ship’s side. The program is a post-processor which reads results of numerical calculations of simulated objects’ motions. The data is used to create scene composed of 3D surfaces to visualize mutual spatial positions of a lifeboat, ship’s side and water waving surface. Since the numerical data contain description of a simulation as a function of time it is possible to screen a static scene showing the simulated objects in an arbitrary instance of time. The program can also reproduce a sequence of scenes in the form of animation and control its speed. The static mode allows to view an arbitrary crosssection of the scene, rotate and enlarge specific details and make the image more realistic by hiding invisible lines or shading. The application of the program is aimed at making it possible to assess and analyze numerical calculation results in advance of their experimental verification.
Źródło:
Polish Maritime Research; 2017, 4; 42-46
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D object shape reconstruction from underwater multibeam data and over ground LiDAR scanning
Autorzy:
Kulawiak, M.
Łubniewski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260564.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
multibeam sonar
laser scanning
three dimensional reconstruction
point cloud
triangulation
Opis:
The technologies of sonar and laser scanning are an efficient and widely used source of spatial information with regards to underwater and over ground environment respectively. The measurement data are usually available in the form of groups of separate points located irregularly in three-dimensional space, known as point clouds. This data model has known disadvantages, therefore in many applications a different form of representation, i.e. 3D surfaces composed of edges and facets, is preferred with respect to the terrain or seabed surface relief as well as various objects shape. In the paper, the authors propose a new approach to 3D shape reconstruction from both multibeam and LiDAR measurements. It is based on a multiple-step and to some extent adaptive process, in which the chosen set and sequence of particular stages may depend on a current type and characteristic features of the processed data. The processing scheme includes: 1) pre-processing which may include noise reduction, rasterization and pre-classification, 2) detection and separation of objects for dedicated processing (e.g. steep walls, masts), and 3) surface reconstruction in 3D by point cloud triangulation and with the aid of several dedicated procedures. The benefits of using the proposed methods, including algorithms for detecting various features and improving the regularity of the data structure, are presented and discussed. Several different shape reconstruction algorithms were tested in combination with the proposed data processing methods and the strengths and weaknesses of each algorithm were highlighted.
Źródło:
Polish Maritime Research; 2018, 2; 47-56
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of agglomerate shape using three-dimensional reconstruction based on a laser displacement sensor
Autorzy:
Zavala De Paz, J. P.
Castillo Castañeda, E.
Soto Herrera, J.
Turchiuli, C.
Powiązania:
https://bibliotekanauki.pl/articles/220899.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
agglomerated particles
laser displacement sensor
shape parameters
three-dimensional reconstruction
Opis:
The agglomeration of particles is a process that modifies the physical properties of a product originally manufactured as a powder. During milk powder agglomeration of fluidized bed, resulting agglomerates are sufficiently porous to improve the solubility of the final product but, at the same time, their rigidity decreases and agglomerates can be destroyed during packing. The porosity and rigidity properties depend on both the volume and shape characteristics of the agglomerates. This paper presents a three-dimensional reconstruction technique based on a laser displacement sensor (LDS) applied to characterize milk agglomerates. This technique allows three-dimensional scanning to estimate particle volume and extract shape parameters such as: sphericity, elongation and flatness ratio, shape factor and aspect ratio. This technique was implemented using a mechatronic device with two degrees of freedom. The device is composed of an angular positioning system to rotate the agglomerate and a linear positioning system to displace the LDS. Experimental result allows agglomerates classification according to shape parameters.
Źródło:
Metrology and Measurement Systems; 2013, 20, 3; 407-418
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies