Radiation Hardening
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. In Situ Synchrotron Radiation Measurements During Axial Strain In Hydrogen Cathodically Charged Duplex Stainless Steel SAF 2205
The objective of this work is the evaluation of hydrogen effects on the martensitic transformation and strain hardening in Duplex Stainless Steels (DSS) SAF 2205 (UNS S32205/S31803). DSS are two-phase alloys (austenite and ferrite), which are used for applications requiring high mechanical strength, in corrosive environments. Therefore, it is necessary a bet
Mat. Res.. Publicado em: 18/12/2017
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2. Photodegradation of UHMWPE Filled with Iron Ore Fine
Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application and the use of fillers may be a suitable way to overcome this. The fillers can influence the photo stabilizat
Mat. Res.. Publicado em: 23/01/2017
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3. Compiler Optimizations Impact the Reliability of the Control-Flow of Radiation-Hardened Software
ABSTRACT: This paper discusses how compiler optimizations influence software reliability when the optimized application is compiled with a technique to enable the software itself to detect and correct radiation-induced control-flow errors. Supported by a comprehensive fault-injection campaign using an established benchmark suite in the embedded systems domai
J. Aerosp. Technol. Manag.. Publicado em: 2013-09
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4. Single event transients in logic circuits - load and propagation induced pulse broadening
The generation and propagation of single event transients (SET) in logic gate chains is studied and modeled. Regarding SET generation, we investigate the dependence of the generated SET pulse width on the struck node capacitance. Rising node capacitance may lead to amplified pulse width, indicating that increasing load capacitance alone is not an option for
Publicado em: 2011
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5. Efeitos da radiação em dispositivos analógicos programáveis (FPAAs) e técnicas de proteção
Este trabalho estuda os efeitos da radiação em dispositivos analógicos programáveis (FPAAs, do inglês, Field Programmable Analog Arrays) e técnicas de proteção que podem ser aplicadas para mitigar tais efeitos. Circuitos operando no espaço ou em altitudes elevadas, como, por exemplo, em satélites e aeronaves, recebem doses de radiação e impacto d
Publicado em: 2011
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6. Estudo e implementação de um microcontrolador tolerante à radiação
Neste trabalho foi elaborado um microcontrolador 8051 tolerante à radiação, usando para isso técnicas de recomputação de instruções. A base para este trabalho foi a descrição VHDL desse microcontrolador, sendo proposto o uso de sensores de radiação, Bulk-BICS, e códigos de proteção de erros para os elementos de memória, como forma de suporte
Publicado em: 2010
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7. Stochastic noise characteristics in matrix inversion tomosynthesis (MITS)
Matrix inversion tomosynthesis (MITS) uses known imaging geometry and linear systems theory to deterministically separate in-plane detail from residual tomographic blur in a set of conventional tomosynthesis (“shift-and-add”) planes. A previous investigation explored the effect of scan angle (ANG), number of projections (N), and number of reconstructed p
American Association of Physicists in Medicine.