How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:

Un episodio della querelle des femmes nella Sicilia del Settecento: l’ Apologia filosofico-storica Di Vincenzo Di Blasi

Andrea Schembari
Kwartalnik Neofilologiczny | 2021 | No 4 | 593-603 | DOI: 10.24425/kn.2021.139562
Keywords Sicily eighteenth century philogyny Di Blasi apology
Download PDF Download RIS Download Bibtex

Abstract

Apologia filosofico-storica in cui si mostra il sesso delle donne superiore a quello degli uomini, published in 1737 by the Palermitan nobleman Vincenzo Di Blasi, is a collection of examples – taken from myth, history and literature – of feminine values and virtues, composed in support of the superiority of the “womanish sex” over the virile one. The work is closely linked to the Sicilian cultural context of that time, suspended between a fossilized scholastic philosophy and a slow reception of the secular and modern Cartesian thought. But it confirms – also in Sicily – the growing cultural and disseminating function acquired by the so called “art of conversation”, alongside the already institutionalized model proposed by the academies.
Go to article

Authors and Affiliations

Andrea Schembari
1
ORCID: ORCID
  1. Uniwersytet Szczeciński

Discovering the Name of Poznań on Bolesław the Brave’s Coin. A Further Extension of the 1st Die-chain of his Coins / Odkrycie nazwy Poznania na monecie Bolesława Chrobrego. Dalsze rozszerzenie łańcucha 1 połączeń stempli jego monet

Stanisław Suchodolski
Wiadomości Numizmatyczne | 2023 | Rok LXVII | 1-32 | DOI: 10.24425/wn.2023.148057
Keywords Bolesław I the Brave coin dies die-chains Poznań
Download PDF Download RIS Download Bibtex

Abstract

coin hoard discovered in an unknown locality east of Saint Petersburg in Russia in 2019 ( tpq 1008/9), contained three Polish coins issued by Bolesław I the Brave of hitherto unknown types (Mikhel’son 2023). One of them bears the inscription: +POZZNANI, the oldest record of Poznań’s name, the then-capital center (Fig. 1). The reverse of this coin, like the two others, was struck from a die that contains the inscription: AЯЄAHLAT (Figs 1–3). This die was already known from the first die-chain of Bolesław the Brave’s coinage. This makes it possible to include the newly discovered coins in the die-chain. As a consequence, die-chain no. 1 can be expanded, its chronology can be made more precise (ca. 998–1010), and can help establish that the linked die-chains were used in the Poznań mint.
Go to article

Authors and Affiliations

Stanisław Suchodolski
1
  1. Institute of Archaeology and Ethnology Polish Academy of Sciences

A New/Old Coin Type of Bolesław I The Brave, and a Hoard That Was Not There

Stanisław Suchodolski
Wiadomości Numizmatyczne | 2022 | Rok LXVI | 167-180 | DOI: 10.24425/wn.2022.141938
Keywords Poland 10th/11th centuries Bolesław I the Brave coin dies imitation of coin dies die-chains
Download PDF Download RIS Download Bibtex

Abstract

The starting point for this text was the publication of a coin, assigned to Bolesław I the Brave (992–1025), Prince of Poland, with the name BOLEZLAV and a two-side representation of a chapel (Grossmanová, Matejko-Peterka, Kašparová 2018; Fig. 4). It is currently stored in the Moravian Museum in Brno. This coin has been known in the literature since the mid-19th century (Cappe 1850). Former researchers assigned it either to Boleslav III in the Bohemia (Cappe 1850; Hanka 1856) or to Bolesław I the Brave in Poland (Stronczyński 1884; Fiala 1895; Gumowski 1939). Newer researchers ignored it completely, suspecting that it was some kind of imitation or contemporary falsification. However, its authenticity is supported by the fact that it was originally in the collection of H. Dannenberg. Finally, the matter was decided by the publication in the auction catalogue (Warszawskie Centrum Numizmatyczne, Auction no. 67, item 132) of a coin minted on one side with the same die as the coin from Brno (Fig. 5). This allows us to postulate the existence of a new fourth die-chain in the coinage of Bolesław I the Brave (Fig. 6).
Go to article

Authors and Affiliations

Stanisław Suchodolski
1
  1. em., Institute of Archaeology and Ethnology, Polish Academy of Sciences, Al. Solidarności 105, PL 00–140 Warsaw, Poland

Influence of Mould Material on the Mechanical Properties of Wax Models

A. Kroma P. Brzęk
Archives of Foundry Engineering | 2021 | vo. 21 | No 3 | 48-52 | DOI: 10.24425/afe.2021.138664
Keywords FDM Investment casting wax models mechanical properties wax injection dies
Download PDF Download RIS Download Bibtex

Abstract

The article presents results of research on the influence of the mould material on selected mechanical properties of wax models used for production of casting in investment casting method. The main goal was to compare the strength and hardness of samples produced in various media in order to analyse the applicability of the 3D printing technology as an alternative method of producing wax injection dies. To make the wax injection dies, it was decided to use a milled steel and 3D printed inserts made using FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication) technology from HIPS (High Impact Polystyrene) and ABS (Acrylonitrile Butadiene Styrene). A semi-automatic vertical reciprocating injection moulding machine was used to produce the wax samples made of Freeman Flakes Wax Mixture – Super Pink. During injection moulding process, the mould temperature was measured each time before and after moulding with a pyrometer. Then, the samples were subjected to a static tensile test and a hardness test. It was shown that the mould material influences the strength properties of the wax samples, but not their final hardness.
Go to article

Bibliography

[1] Campbell, J. (2015). Complete casting handbook: metal casting processes, techniques and design. (2nd ed.). Oxford: Butterworth-Heinemann.
[2] Tamta, K. & Karunakar, D.B. (2020). Development of hybrid pattern material for investment casting process: an experimental investigation on improvement in pattern characteristics. Materials and Manufacturing Processes. 36(6), 744-751. DOI: 10.1080/10426914.2020.1854471.
[3] Bernat, L. & Popielarski, P. (2020). Identification of substitute thermophysical properties of gypsum mould. Archives of Foundry Engineering. 20(1), 5-8. DOI: 10.24425/afe.2020.131274.
[4] Guzera, J. (2010). Casting production in autoclaved gypsum moulds using investment casting method. Archives of Foundry Engineering. 10(3), 307-310. (in Polish).
[5] Sarbojeet, J. (2016). Crystallization behavior of waxes. Doctoral dissertation. Utah State University, Logan, United States of America.
[6] Unknown author, Investment casting process steps (lost wax). Retrieved January 12, 2021, from http://americancastingco.com/investment-casting-process.
[7] Ruwoldt, J., Humborstad Sørland, G., Simon, S., Oschmann, H-J. & Sjoblom, J. (2019). Inhibitor-wax interactions and PPD effect on wax crystallization: New approaches for GC/MS and NMR, and comparison with DSC, CPM, and rheometry. Journal of Petroleum Science and Engineering. 177. 53-68. DOI: 10.1016/j.petrol.2019.02.046
[8] Jung, T., Kim, J-N. & Kang, S-P. (2016). Influence of polymeric additives on paraffin waxes crystallization in model oils. Korean Journal of Chemical Engineering. 33(6), 1813-1822. DOI: https:://doi.org/10.1007/s11814-016-0052-3.
[9] Simnofske, D. & Mollenhauer, K. (2017). Effect of wax crystallization on complex modulus of modified bitumen after varied temperature conditioning rates. IOP Conference Series: Materials Science and Engineering. 236. DOI: 10.1088/1757-899X/236/1/012003.
[10] Edwards, R.T. (1957). Crystal Habit of Paraffin Wax. Industrial & Engineering Chemistry. 49(4), 750-757. DOI: https://doi.org/10.1021/ie50568a042.
[11] Dantas Neto A.A., Gomes, E.A.S. & Barros Neto, E.L., Dantas, T.N.C. & Moura C.P.A.M. (2009). Determination of wax appearance temperature (WAT) in paraffin/solvent systems by photoelectric signal and viscosimetry. Brazilian Journal of Petroleum and Gas. 3(4), 149-157. ISSN: 1982- 0593.
[12] Unknown author, Freeman super pink flake wax: technical data sheet. Retrieved January 12, 2021, from https://www.freemanwax.com/datasheets/Injection/tdssuperpink.pdf.
[13] Unknown author, M-series-specification. Retrieved January 12, 2021, from https://support.zortrax.com/m-seriesspecification/.
[14] Clarke, E.W. (1951). Crystal Types of Pure Hydrocarbons in the Paraffin Wax Range. Industrial & Engineering Chemistry. 43(11), 2526–2535. DOI: https://doi.org/10.1021/ie50503a037
Go to article

Authors and Affiliations

A. Kroma
1
P. Brzęk
1
  1. Poznan University of Technology, Institute of Materials Technology, Division of Foundry, Piotrowo 3, 61-138 Poznań, Poland

Studies on Flexural Properties and Construction of Failure Mode Map for Copper Sandwich Panels

A. Vino K. Kalaichelvan S. Sajith G. Kumaresan
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4 | 1371-1380 | DOI: 10.24425/amm.2022.141064
Keywords brazing Forming Honeycomb Strain energy flexural stiffness ED Wire cutting Dies EDS
Download PDF Download RIS Download Bibtex

Abstract

This paper is focused on investigating the mechanisms associated with different failure modes of copper (C101) sandwich panels with honeycomb cores of different heights subjected to flexural loading. Honeycomb core is made up of copper strips which were formed to required shapes using Dies fabricated by Electric Discharge Wire cut machining technique. All the joints in the sandwich panel were established through Brazing technique. Three-point bending test was conducted as per ASTM standard C-393. It was observed that increase in height of the core resulted in panels with higher strength to weight ratio. It also exhibited higher stiffness to weight ratio and very high strain energy absorption ability. An increase in flexural strength was reported with a maximum of 43% improvement for 10.9 mm core compared to 6.9 mm core. Further, 81.75% increase in absorbed strain energy was reported for 10.9 mm thick panel compared to 6.9 mm. The Optical and scanning electron microscope (SEM) analysis confirmed the establishment of good bonding between the filler and the substrate. Energy-dispersive Spectroscopic (EDS) analysis revealed the presence of Cu, Al, Zn, SiO2 and CaCO3 in the substrate. Further it also revealed the presence of Cu, CaCO3 and GaP in the filler material. The failure mode map was constructed which can be used for predicting different types of failures more likely to occur for specific parameters of copper sandwich panel. The dominant failures occurred during testing was in good agreement with the prediction done through failure mode map. The appreciable results in the proposed research may be supportive in construction of cooling system. The structure development and process control are convenient in mass production in automobile industries.
Go to article

Authors and Affiliations

A. Vino
1
ORCID: ORCID
K. Kalaichelvan
1
ORCID: ORCID
S. Sajith
2
ORCID: ORCID
G. Kumaresan
3
ORCID: ORCID
  1. Anna University, Department of Ceramics, AC Techcampus, Chennai, India
  2. Anna University, Department of Aerospace Engineering, MIT Campus, Chennai, India
  3. Bannari Amman Institute of Technology, Department of Mechanical Engineering, Sathya Mangalam, Erode – 638 401, India

Not Only Overstrikes. Recycling of the Oldest Polish Bracteate Dies

Grzegorz Śnieżko
Wiadomości Numizmatyczne | 2022 | Rok LXVI | 199-213 | DOI: 10.24425/wn.2022.141940
Keywords Poland 12th century Bolesław III Wrymouth coin dies secondary use overstrikes bracteates oldest Polish bracteates
Download PDF Download RIS Download Bibtex

Abstract

This article concerns the discovery of traces on coins that demonstrate the recycling of dies used to strike Bolesław III Wrymouth’s bracteates. They are the oldest Polish coins made using this technique. These allow us to establish the relative chronology of coins of both types and to provide evidence of a common mint origin, contributing to the wider discussion over the nature of the issue of bracteates. Thanks to this, it can be shown that as long as a coin with traces of an older design remains unique, it is equally possible to interpret it as either an overstrike or a secondary use of a die with newly engraved content.
Go to article

Authors and Affiliations

Grzegorz Śnieżko
1
ORCID: ORCID
  1. Institute of Archaeology and Ethnology, Polish Academy of Sciences, Al. Solidarności 105, PL 00–140 Warsaw, Poland

This page uses 'cookies'. Learn more