Wyniki wyszukiwania - BazTech

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Methods of implementation and operation of hardware DRM protection on the example of printer cartridges

Cybowski Wojciech

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2022

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nr 25(1)

117--137

EN

Tens of millions of printers are sold each year, including copiers and multifunction devices. Each printer needs an ink or toner cartridge, depending on the type of printer. This is where the problems arise that anyone who owns such a device has encountered – the price and availability of cartridges. A set of original cartridges for the printer we bought can sometimes cost more than the printer itself. On the other hand, it is not always possible to buy cheaper replacement consumables. This is often due to the fact that the manufacturer of the printer has implemented a Digital Rights Management (DRM) protection in the chip connected to the cartridge. Bypassing such protection is not trivial, and when a way to do so is learned, it is not disclosed because of the commercial value of such knowledge. The goal of this paper is to determine if it is possible to find out for ourselves how selected DRM protections work by using reverse engineering, and to develop a way to reset these protections so that we are not tied to the price and availability of consumables on the market, as we can remanufacture our cartridges ourselves, which is especially important in the context of the Right to Repair.

2

Sniper Rifle Cartridge

Syroka Zenon

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2021

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nr 24(1)

195--210

EN

The paper proposes a modification of the 7.62 mm NATO rifle cartridge. The design and the results of a computer simulation were presented. The projectile’s flight behavior under different weather conditions was simulated. A figure diagram and a digital model of the projectile were presented. Ballistic calculations were performed, and an animation showing the projectile’s behavior under various weather conditions was developed. The results were patented.

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Improvements in the Structural Integrity of Resin Based Combustible Cartridge Cases (CCC) at Elevated Temperatures

Dey A., Athar J., Gogoi S., Navle P. B., Sikder A. K.

Central European Journal of Energetic Materials

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2015

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Vol. 12, no. 1

117--127

EN

An advanced, solvent-less resin based Combustible Cartridge Case (CCC), designed to resolve the inherent problems of shrinkage and limited mechanical strength associated with the gelatinisation of nitrocellulose, has already been developed. The felt-moulded components contain thermoplastic polyvinyl acetate (PVAc) resin as the binder and the enhanced mechanical strength is achieved by carrying out hot compaction of dry felts at an elevated temperature (105 ± 2 °C). Presently, resin based technology is adopted for tank gun ammunition and also for the developed modular CCCs, i.e. the Modular Combustible Case (MCC) for different types of artillery gun ammunition. However, during exhaustive trials conducted with the resin based CCCs in 120 mm tank gun ammunition at three temperatures, i.e. -10, 27 and 55 °C, severe geometrical deformation was noticed when the rounds were conditioned at 55 °C for 24 h., adversely affecting the loading of rounds into the gun chamber. This was attributed to the combined effects of softening of the resin at that temperature and the load of the projectile/ shell (14.4 kg) experienced by the CCC region during conditioning of the round in the horizontal mode. In order to resolve this problem of deformation, PVAc resin was required to be modified. The PVAc resin was modified to the form of a nanocomposite. PVAc nano composite was prepared by dispersing organically modified nano clay, i.e. Cloisite 30B, into the resin before making the CCCs. The nanocomposite of PVAc resin was characterized by FTIR, DMA, softening point measurement etc. The results showed a remarkable improvement in the glass transition temperature (Tg) and in the softening temperature of the modified PVAc resin. This modified PVAc resin was used to prepare CCCs. Furthermore, these CCCs were coated with hexamethylene diisocyanate (HMDI) on the inner and the outer surfaces. The isocyanate coating becomes crosslinked in the matrix, thereby improving the softening point as well as the mechanical properties of the CCCs. These modified CCCs were repeatedly tested at 55 and 60 °C for 24 h. After testing, it was found that no deformation had taken place and the assembled rounds were easily loaded into the gun chamber. The use of the PVAc nanocomposite in the preparation of resin based CCCs, followed by isocyanate coating, is an effective means of achieving the required improvement in structural integrity of the resin CCCs at elevated temperatures.

4

Globalny cel - recykling.

Pawlak J.

Recykling

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2006

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nr 3

34-34

PL

Hewlett-Pachard - światowy dostawca rozwiązań z zakresu nowych technologii dla użytkowników indywidualnych i instytucjonalnych - w 2005 r. zwiększył recykling o 17%. Osiągnął w ten sposób znaczny postęp w realizacji celu zakładającego przetworzenie blisko 500 rys. ton produktów.

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Recykling i refabrykacja wkładów do drukarek, faksów i kserokopiarek w świetle przepisów Unii Europejskiej

Trejderowski T.

Problemy Ekologii

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2006

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R. 10, nr 2

99-101

PL

Od połowy sierpnia 2005 roku w Polsce obowiązuje druga (pierwsza obowiązuje od połowy sierpnia 2004 r.) z dwóch dyrektyw Unii Europejskiej dotyczących recyklingu oraz postępowania ze zużytymi materiałami eksploatacyjnymi powstałymi w procesie użytkowania urządzeń elektrycznych i elektronicznych. W sposób szczególny nacisk położono w nich na postępowanie ze zużytymi wkładami drukującymi stosowanymi w drukarkach, kserokopiarkach, faksach i innych urządzeniach biurowych, których produkcja (zużycie) sięga kilkudziesięciu milionów ton rocznie w samej tylko Unii Europejskiej. Artykuł charakteryzuje pokrótce wytyczne przedstawione w obu dyrektywach oraz ich wpływ na życie codzienne zarówno producentów wspomnianych wkładów drukujących, jak i szeregowych użytkowników urządzeń biurowych i drukujących. Ponadto przedstawiono stanowisko oraz wdrożone programy recyklingu w firmach zajmujących się produkcją bądź utylizacją tego typu wkładów na skalę masową.

EN

Since August 2005 the other of the two EC Directives (the first came into force in mid-August 2004) on recycling and utilisation procedures of used consumable materials resulting from the operation of electric and electronic equipment has become effective in Poland. Special stress has been put on the utilisation procedures concerning used cartridges from printers, copy machines, faxes and other office equipment the annual consumption of which reaches several tens of million of tons only in the European Union. The article contains a brief characteristic of provisions in both directives along with their impact on the everyday life of both: cartridge producers and users of office equipment. Moreover, the position has been presented together with implemented recycling programmes in firms dealing with production or mass utilisation of cartridges.