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Tytuł:
Determination of Binder Content in Traditional Sandmixes by Microwave Method
Autorzy:
Nowak, D.
Powiązania:
https://bibliotekanauki.pl/articles/106941.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
molding sand
binder
microwaves
Opis:
This paper presents preliminary research on the possibility of determining the binder content in traditional sandmixes by the microwave method. The research included examinations of three kinds of bentonite. The presented measurements were carried-out with the use of a special stand – the so-called slot line. The concentration of the binder in molding sand was determined on the grounds of measurements of a parameter; i.e., absorbed power or output power of the electromagnetic wave. One of the main advantages of the suggested new method is the short time of the measurement.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 4; 80-84
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Possibilities in Thermal Analysis of Molding Materials
Autorzy:
Svidró, J.
Diószegi, A.
Powiązania:
https://bibliotekanauki.pl/articles/107009.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
casting
foundry sand
Fourier thermal analysis
heat absorption
molding material
silica sand
Opis:
Molding material-related studies within the research activities concerning foundry technology have always been limited despite the significant effect of molding mixtures on the quality of cast parts. One reason behind this trend is the difficulty in interpreting the results of such complex systems like molds and cores. This paper provides a new possibility for studying the heat-absorption performance of materials used as molding media in metal casting processes. By further developing the Fourier thermal analysis method of cores and molds introduced by earlier studies, the investigation of unbonded sand has become available. The heat-absorption properties of the components can be hereby separated and studied respectively. Thermal analyses were performed on sphere-shaped resin-bonded cores with various binder levels as well as on unbonded sand samples. The temperature data collected from two points of the samples were then used for the calculation of the novel thermophysical properties. The results revealed not only quantitative but qualitative differences in the characteristics of the binder decomposition processes, providing a deeper understanding on the thermal behavior of molding materials. The outcome of the research provides more accurate data, which is the key for the improved simulation of casting processes.
Źródło:
Journal of Casting & Materials Engineering; 2018, 2, 4; 67-70
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Beneficiation on Some Properties of Osun State Ceramic Raw Materials
Autorzy:
Abiolaa, Oluranti Adetunji
Oke, Adekola Olayinka
Omidiji, Babatunde Victor
Adetan, Dare Aderibigbe
Powiązania:
https://bibliotekanauki.pl/articles/106975.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
clay
feldspar
silica sand
beneficiation
ceramic
Opis:
Clay, feldspar and silica sand are important industrial minerals which often need treatment commonly known as beneficiation to improve the quality of ceramic tiles produced from these materials. The different minerals, after sorting, were treated separately in distilled water, alcohol and hydrochloric acid before being crushed in a ball mill; they were then characterized using a pelletron accelerator. The results show an increased silicon content for clay, silica sand and feldspar; and reduced aluminum content for clay and silica sand but not for feldspar. Iron impurity and its oxide are also shown to reduce by over 50% in all the minerals while potassium was found to be the dominant element in feldspar among the defining elements. In conclusion, the increased quartz in the mineral will improve the hardness, density, porosity, and rigidity of ceramic tiles as well as providing support and controlling shrinkage. Furthermore, increasing the mineral quotient in feldspar will enhance its fluxing potential.
Źródło:
Journal of Casting & Materials Engineering; 2019, 3, 3; 62-66
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water chemical composition characteristic in the upper part of the Sztoła River
Autorzy:
Juśko, K.
Kasprzak, A.
Pietrzak, D.
Powiązania:
https://bibliotekanauki.pl/articles/184148.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
zinc ore mining
lead ore mining
sand extraction
Opis:
The Sztoła River crosses Lesser Poland and Silesia voivodships in the region of Olkusz zinc and lead ores mining and sands extraction. It is one of the left-bank tributary of Biała Przemsza. Its sources are located southwest of Olkusz. In the geological structure of Sztoła water catchment area, on the basis of conducted drillings, the following deposits can be distinguished: Paleozoic, represented by Permian deposits, Mezozoic-Triassic deposits, and Cenozoic-Quaternary deposits (Buła 2000, Motyka 2010). Hydrodynamic conditions in the region of Sztoła have been strongly interrupted by the development of zinc and lead ores mining and a sand pit, which required an application of drainage. The first system of drainage was adits built in 16 th century, which resulted in a decrease of the groundwater table level from few to over a dozen meters (Żukowski 1946, Górnisiewicz 1975, Molenda 1977, Kosiński 1882). The intensive development of mining in this region began in the first half of 19 th century, along with appearance of new drainage techniques. The Sztoła River changed its character from draining to infiltrating on its the whole length as the effect of development of vast zinc and lead ores mine depression cone, related to the exploitation of the „Pomorzany” mine, and later with a gravitational drainage of sandpit „Szczakowa” (Witczak & Motyka 1975, Haładus et al. 2007). In the upper part of the river it resulted with a partial dry out of the riverbed. Water flowing in the river originated from the drainage of Olkusz zinc and lead ores mines and is directed there through Baba channel. A research conducted in the summer of 2014 examined the upper part of the Sztoła River. Groundwater taken from springs, as well as surface water, was collected, and the areas of critical riverbed dry out were identified. A complete physicochemical analysis was carried out in the AGH hydrogeochemical laboratory in Cracow. On the basis of the received data, the characteristics of chemical composition of groundwater and surface water were prepared. Their hydrochemical type, pH values, electrolytical conductivity was determined. Chemical composition was also presented in the selected graphical forms (Piper, Collins, Pie Chart). Based on analysis, the statistical parameters of composition of water from the research region were calculated. Furthermore, the quality of underground and surface water was evaluated according to the existing standards, and suitability to consumption by people was determined. The Obtained data were also compared with archival results of samples collected within the investigated area.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 1; 81-82
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Approach to Quantifying the Effect of the Density of Sand Cores on Their Gas Permeability
Autorzy:
Sundaram, Dinesh
Svidró, József Tamás
Svidró, Judit
Diószegi, Attila
Powiązania:
https://bibliotekanauki.pl/articles/2105204.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
compaction
density
furan sand
gas permeability
porous media
Opis:
The density of moulding mixtures used in the foundry industry plays a significant role since it influences the strength, porosity, and permeability of moulds and cores. The latter is routinely tested in foundries using different solutions to control the properties of the moulding materials that are used to make moulds and cores. In this paper, the gas permeability of sand samples was measured using a custom-made setup to obtain the gas permeability in standard units instead of the usual permeability numbers (PN) with calibrated units. The aim of the work was to explore the effect of density variations in moulding materials on their gas permeabilities. Permeability in this work is quantified in SI units, square metres [m2]. The setup works based on Darcy’s law and the numbers obtained from the measurements can be used to deduce the gas permeability, k, of a sample. Two furan resin bonded mixtures with the same grain size distribution were hand-rammed with varying compaction forces to obtain a variation in density. Cylindrical samples (50 × 50 mm) were prepared using a silica sand aggregate sourced from a Swedish lake. The results of the measurement provided the difference in gas permeability between the samples that have varying densities. The results of permeability were then extrapolated by modifying the viscosity value of the air passed through the sample. In order to find the effect of apparent density variation on the pore characteristics of the samples, mercury intrusion porosimetry (MIP) was also performed. The results were in line with the gas permeability measurements.
Źródło:
Journal of Casting & Materials Engineering; 2022, 6, 2; 33--38
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method
Autorzy:
Dańko, R.
Jamrozowicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/106993.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
core shooting
core blowing
molding sand
resin migration
Opis:
Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 3; 70-73
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model of gas-liquid-sand mixture separation in the four-phase separator of inertial type for subsea application
Autorzy:
Kopey, B. V.
Kryvonozhko, T. A.
Liakh, M. M.
Yuriev, E. V.
Powiązania:
https://bibliotekanauki.pl/articles/299239.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
separator
four-phase
efficiency
subsea
oil
gas
water
sand
Opis:
In this article the construction and mathematical model of four-phase separator is realized, which is based on inertial separation mechanism of gas-liquid-sand mixture. Also we have put the problem on the basis of this model to obtain the dependence of separator efficiency on the parameters which play a crucial role in the technological process of separating gas-oil-water-sand mixture into a solid, liquid and a gas phase.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 2; 361-377
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial Neural Networks as a Tool for Supporting a Moulding Sand Control System Based on the Dependency between Selected Moulding Sand Properties
Autorzy:
Mrzygłód, Barbara
Jakubski, Jarosław
Opaliński, Andrzej
Regulski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/24201264.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
artificial neural network
decision support
green moulding sand
compactibility
Opis:
The article presents the potential for using artificial neural networks to support decisions related to the rebonding of green moulding sand. The basic properties of the moulding sand tested in foundries are discussed, especially compactibility as it gives the most information about the quality of green moulding sand. First, the data that can predict the compactibility value without the need for testing are defined. Next, a method for constructing an artificial neural network is presented and the network model which produced the best results is analysed. Additionally, two applications were designed to allow the investigation results to be searchable by determining the range of values of the moulding sand parameters.
Źródło:
Journal of Casting & Materials Engineering; 2023, 7, 2; 15--21
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Analysis of the Prospects of the Use of Magnetic Water Treatment in Foundry Engineering
Autorzy:
Dan, Leonid
Trofimova, Larysa
Powiązania:
https://bibliotekanauki.pl/articles/24201265.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
water
magnetic field
magnetic water treatment
molding sand
green strength
Opis:
Scientists are currently focused on creating technologies that produce positive results without affecting the environment. One such technology is magnetic water treatment. In this paper, an analytical review of publications devoted to the application of magnetic treatment of water in various branches of engineering, agriculture, and medicine is carried out. Current views on the structure of water molecules, as well as the theories explaining the influence of the magnetic treatment of water on its properties, are reviewed. The results of studies of the influence of water treated by a magnetic field on the properties of molding sand are analyzed, including those in which the authors of the article took part. It is shown that the magnetic treatment of still water can increase the green strength of the molding sand containing this water from 0.035 to 0.052 MPa, and that of water in motion to 0.075 MPa. Thanks to this, the amount of binder in the molding sand can be reduced. It is concluded that the use of magnetically treated water in foundries is promising.
Źródło:
Journal of Casting & Materials Engineering; 2023, 7, 2; 22--26
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości oceny zailenia ośrodków piaszczysto-ilastych na podstawie pomiaru kąta fazowego
Assessibility of clay content in clayey-sandy media on the basis of phase angle measurement
Autorzy:
Krochmal, J. K.
Powiązania:
https://bibliotekanauki.pl/articles/299481.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
kąt fazowy
ośrodki piaszczysto-ilaste
phase angle
sand-clayey media
Opis:
W artykule prezentowane są wyniki kontynuacji badań kąta fazowego Psi dla pośrednich udziałów objętościowych iłu i piasku, którego efektem końcowym było zgłoszenie projektu wynalazczego nr P-393 413 oraz podano metodykę i uwarunkowania dające możliwość określenia iłu w ośrodkach piaszczysto ilastych, co było istotnym punktem realizacji projektu badawczego N524 348335.
The results of further investigation of phase angle Psi for indirect volume content of clay and sand are presented in the paper. As a result a patent application nr P-393 413 was submitted. Methods and conditions of assessing clay content in sand-clayey media were established, and that created bases for realization of a research project N524 348335.
Źródło:
Wiertnictwo, Nafta, Gaz; 2011, 28, 1-2; 209-215
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Optimization of a Numerical Steel Foundry Simulation Through a Characterization of the Thermal Properties of the Materials
Autorzy:
Souêtre, Morgan
Vaucheret, Alexis
Jacquet, Philippe
Carton, Jean-François
Powiązania:
https://bibliotekanauki.pl/articles/2172386.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
foundry simulation
low-alloyed steel
green sand
thermal analysis
CALPHAD
Opis:
In many foundries, numerical simulation is used to determine the origins of different defects as this tool allows the acceleration of the design process. However, the databases provided by different software do not seem to tally with the actual properties of the material. In fact, every foundry uses a different grade of steel and varying mixtures of sand. An evaluation of the impact of different material properties showed the importance of measuring every physical property to improve the database of the software. Following this, an experiment was conducted to evaluate the gap between numerical simulations and the results obtained through experimentation. This experiment, called thermal analysis, consists in measuring the solidification and cooling of a cylinder filled with liquid steel. After the calculation of the steel properties and a simulation with real experimental parameters, a comparison between each cooling curve was realized. This comparison shows that the calculated properties provide a simulated cooling curve which is closer to the experimental curve than the properties in the original database. We did not explore all of the metal properties in this study, but the modification of the sand properties was explored, together with the thermal conductivity of the steel and sand. These other measurements will be obtained in a future study.
Źródło:
Journal of Casting & Materials Engineering; 2022, 6, 4; 76--80
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer modelling of the ablation casting process and prediction of the strength properties of AC-42000 castings
Autorzy:
Małysza, Marcin
Puzio, Sabina
Major-Gabryś, Katarzyna
Głowacki, Mirosław
Wilk-Kołodziejczyk, Dorota
Kamińska, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/29520071.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
casting
simulations
ablation
gravity sand casting
gravity die casting
mechanical properties
Opis:
The demand for castings with superior properties has compelled the development and optimization of manufacturing technologies. By further developing already known techniques, we are able to contribute to the introduction of new research possibilities. The article presents the methodology of conducting simulation tests of the gravity casting process into sand moulds with the use of ablation. The ablation technique consists in spraying water through evenly spaced nozzles onto a mould into which the liquid casting alloy has been poured. The conducted research focuses on an alloy from the group of Al-Si alloys. In order to compare the effects of different techniques, additional tests were carried out for gravity casting into sand and metal die moulds. At the same time, virtual experiments were conducted to develop a simulation methodology for ablation casting technology, taking into account mould degradation. Additionally, the possibility of predicting the final mechanical properties of various manufacturing technologies was tested. Destructive tests were carried out to determine the mechanical properties in the cast samples, as well as microstructure tests and secondary dendrite spacing. The results of the mechanical tests are compared with the predicted simulation properties.
Źródło:
Computer Methods in Materials Science; 2022, 22, 2; 79-88
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the Glassex additive on technological and knock--out properties of the moulding sands with hydrated sodium silicate and new ester hardeners
Wpływ dodatku Glassex na właściwości technologiczne i wybijalność mas z uwodnionym krzemianem sodu i nowymi utwardzaczami estrowymi
Autorzy:
Major-Gabryś, K.
Dobosz, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/263880.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
samoutwardzalna masa formierska
szkło wodne
wybijalność
self-hardening moulding sand
water glass
Opis:
The article takes into consideration the researches concerning inserting the Glassex additive to the moulding sands with water glass and the new ester hardeners. The investigations combine the works connected to the Glassex additive influence on the moulding sand's with water glass knock-out properties and the works connected to the elaboration of the new ester hardeners upgrading of ability to mechanical reclamation of the moulding sand with water glass.
Artykuł omawia badania dotyczące wprowadzenia do mas formierskich ze szkłem wodnym dodatku Glassex oraz zastosowania nowych utwardzaczy estrowych. Przedstawione badania łączą prace autorów dotyczące określenia wpływu dodatku Glassex na wybijalność mas ze szkłem wodnym z pracami dotyczącymi wpływu nowych utwardzaczy estrowych na zdolność do regeneracji tych mas.
Źródło:
Metallurgy and Foundry Engineering; 2011, 37, 1; 33-40
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozdrabnianie ziaren piasku kwarcowego na laboratoryjnym stanowisku młyna strumieniowo-tarczowego
Comminution of quartz sand grains on the laboratory stand of target-jet mill
Autorzy:
Górecka-Zbrońska, A.
Zbroński, D.
Powiązania:
https://bibliotekanauki.pl/articles/349272.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
rozdrabnianie
piasek kwarcowy
młyn strumieniowo-tarczowy
comminution
quartz sand
target-jet mill
Opis:
W artykule zaprezentowano wyniki badań rozdrabniania wybranych klas ziarnowych piasku kwarcowego na laboratoryjnym stanowisku młyna strumieniowo-tarczowego. Stanowisko umożliwiało przeprowadzenie prób swobodnego rozdrabniania ziaren przyspieszanych w strumieniu powietrza i uderzających w nieruchomą tarczę. Wyznaczone rozkłady ziarnowe produktu umożliwiły ocenę jakości i skuteczności przeprowadzonych prób rozdrabniania. Na podstawie wyników badań podjęto próbę wyjaśnienia mechanizmu rozdrabniania ziaren w młynie strumieniowo-tarczowym. Przeprowadzona analiza wykazała, że rozdrabnianie ziaren piasku kwarcowego dla przyjętych parametrów procesu zachodzi głównie w wyniku udarowego pękania i powierzchniowego ścierania ziaren.
The experimental results of comminution process selected size fractions of quartz sand on the laboratory stand of target-jet mill are presented in the paper. Experiment stand makes possible to comminute grains accelerated by the air jet with a single impact, using stationary target. Determined particle size distribution of product makes possible to estimate of quality and efficiency of comminution process. On the basis of experimental results the probable explanation of comminution mechanism of grains in the target-jet mill is presented. The analysis showed that comminution in the mill takes place as a result of percussive cracking and superficial attrition of grains.
Źródło:
Górnictwo i Geoinżynieria; 2010, 34, 4/1; 61-70
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geophysical techniques for hydrogeological targets in semi-desert area in southern part of Vietnam
Badania geofizyczne dla celów hydrogeologicznych w południowej części Wietnamu
Autorzy:
Giang, N. V.
Thanh, L. N.
Dec, J.
Powiązania:
https://bibliotekanauki.pl/articles/183620.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
metody geofizyczne
wody podziemne
skała wodonośna
wydmy
geophysical tools
groundwaters
aquifer
sand dunes
Opis:
Obszar badań jest zlokalizowany w południowej części Wietnamu na obszarze wsi Hong Phong i Hoa Thang w okręgu Bac Binh w prowincji Binh Thuan, gdzie występują czerwone piaski wydm przybrzeżnych. Obszar ten należy do najbardziej suchych w Wietnamie. Wykonano pomiary oraz przetwarzanie i interpretację danych geofizycznych w celu oceny warunków hydrogeologicznych. Wykonano sondowania i profilowania geoelektryczne, sejsmiczne badania refrakcyjne, sondowania magnetycznego rezonansu jądrowego, MRS, badania elektromagnetyczne VLF oraz TEM, a także badania georadarowe dla rozpoznania struktur geologicznych. Głównym celem było rozpoznanie potencjału hydrogeologicznego. Stwierdzono występowanie dwóch warstw wodonośnych, z których druga, na głębokości 40-90 m okazała się warstwą perspektywiczną.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 455-462
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
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