8,587 research outputs found
Digital design techniques for dependable High-Performance Computing
No full textL'abstract è presente nell'allegato / the abstract is in the attachmen
Micro Latch-up Analysis on Ultra- Nanometer VLSI Technologies: A new Monte Carlo Approach
No full textUltra-scale devices based on technologies below 20nm are nowadays widely adopted due to their elevated computing features and low power consumption. These characteristics made them attractive even for fields where the high reliability is the major concern like automotive or aerospace ones. In order to guarantee a high reliability level, one of the major challenge in these application fields is the protection versus the micro latch-up effect: a phenomenon that temporarily affects the logical behavior of technology cells at various locations across the die provoking circuit misbehavior. In this paper, we propose a new analysis flow for detecting the occurrences of micro latch-up event considering the physical layout of a circuit. In details, a circuit layers has been developed in order to identify the micro latch-up sensitive points in the 3D layout geometry, while a Monte-Carlo approach has been developed to calculate the micro latch-up error rate on routing interconnection nodes. Experimental results have been performed by fault simulation on a benchmark circuit implemented in six different variants of routing congestion using a 15 nm COTS technology library demonstrating the feasibility of the proposed approach
Effective Characterization of Radiation-induced SET on Flash-based FPGAs
No full textSingle Event Transients (SETs) are one of the major concern for Flash-based Field Programmable Gate Arrays (FPGAs). In this paper, we propose a new analysis to characterize the SET phenomena within Flash-based FPGAs
Concurrent Detection and Classification of Faults in Matrix Converter using Trans-Conductance
No full textThis paper presents a fault diagnostic algorithm for detecting and locating open-circuit and short-circiut faults in switching components of matrix converters (MCs) which can be effectively used to drive a permanent magnet synchronous motor for research in critical applications. The proposed method is based on monitoring the voltages and currents of the switches. These measurements are used to evaluate the forward trans-conductance of each transistor for different values of switch voltages. These trans-conductance values are then compared to the nominal values. Under healthy conditions, the values obtained for the fault signal is less than the tolerable value. Under the open/short-circuit conditions, the fault signal exceeds the threshold, hence enables the matrix converter drive to detect and exactly identify the location of the faulty IGBT. The main advantages of this diagnostic method include fast detection and locating of the faulty IGBT, easiness of implementation and independency of the modulation strategy of the converter.DOI: http://dx.doi.org/10.11591/ijpeds.v5i1.606
Digital Design Techniques for Dependable High Performance Computing
No full textAs today’s process technologies continuously scale down, circuits become increasingly more vulnerable to radiation-induced soft errors in nanoscale VLSI technologies. The reduction of node capacitance and supply voltages coupled with increasingly denser chips are raising soft error rates and making them an important design issue. This research work is focused on the development of design techniques for high-reliability modern VLSI technologies, focusing mainly on Radiation-induced Single Event Transient. In this work, we evaluate the complete life-cycle of the SET pulse from the generation to the mitigation. A new simulation tool, Rad-Ray, has been developed to simulate and model the passage of heavy ion into the silicon matter of modern Integrated Circuit and predict the transient voltage pulse taking into account the physical description of the design. An analysis and mitigation tool has been developed to evaluate the propagation of the predicted SET pulses within the circuit and apply a selective mitigation technique to the sensitive nodes of the circuit. The analysis and mitigation tools have been applied to many industrial projects as well as the EUCLID space mission project, including more than ten modules. The obtained results demonstrated the effectiveness of the proposed tools
Radiation-induced SET on Flash-based FPGAs: Analysis and Filtering methods
No full textReliability of Integrated Circuits (ICs) it is nowadays a major concern for deep sub-micron technology. The progressive decreasing of device feature sizes provokes an increasing sensitiveness to radiation-induced particle strikes within the device silicon structure generating a larger number of Single Event Transients (SETs). In the present paper, we propose a new analysis to characterize the SET phenomena within Flashbased FPGAs. Besides, we developed a new mitigation strategy based on the modification of the place and routed design to improve the filtering capability selectively adding electrical resistive capacitive loads without introducing performance degradation and introducing a limited overhead in terms of routing segments. Experimental results performed on a various set of benchmark circuits shows a mitigation of SET improved of 3 orders of magnitude with respect to traditional logical filtering solutions with a minimal performance degradation of about 9%
The 'true use of reading' : Sarah Fielding and mid eighteenth-century literary strategies.
No full textPhDThe aim of this thesis is to explore, by examining her life and
works, how Sarah Fielding (1710-68) established her identity as an author.
The definition of her role involves her notions of the functions of
writing and reading.
Sarah Fielding attempts to invite readers to form a sense of ties
by tacit understanding of her messages. As she believes that a work
of literature is produced through collaboration between the writer and
the reader, it is an important task in her view to show her attentiveness
toward reading practice. In her consideration of reading, she has two
distinct, even opposite views of her audience: on the one hand a familiar
and limited circle of readers with shared moral and cultural values and
on the other potential readers among the unknown mass of people. The
dual targets direct her to devise various strategies. She tries to
appeal to those who can endorse and appreciate her moral values as well
as her learning. Her writings and letters testify that she is sensitive
to the demands of the literary market, trying to lead the taste of readers
by inventing new forms.
The thesis opens with an overview of Sarah Fielding's career,
followed by a consideration of her critical attention to the roles of
reading. I go on to examine the narrative structures and strategies
she deploys, with a particular emphasis on her use of the epistolary
method. The following chapter deals with her attention to the reading
of the moral message tangibly embodied in her educational writing. It
is followed by an analysis of the activity which earned her a reputation
as a learned woman. Various as the forms of her works are, they invariably
reflect her attempt to balance herself between the two demands of
inventiveness and familiarity
First person - Sarah Alghamdi
No full textABSTRACT
First Person is a series of interviews with the first authors of a selection of papers published in Disease Models & Mechanisms, helping early-career researchers promote themselves alongside their papers. Sarah Alghamdi is first author on ‘ Contribution of model organism phenotypes to the computational identification of human disease genes’, published in DMM. Sarah is a PhD student in the lab of Robert Hoehndorf at King Abdullah University of Science and Technology, Thuwal, Saudi Arabia, investigating artificial intelligence, specifically knowledge representation and reasoning over biomedical data
Portrait of the English anthropologist Gregory Bateson, New Guinea, 1929 [picture] /
No full textPart of the collection: Sarah Chinnery photographic collection of New Guinea, England and Australia.; Gregory Bateson, famous English anthropologist, New Guinea research in Bainings and Sepik, eventually lived and worked in the United States. Author of "Naven" and other works. -- Accompanying notes from family.; Inscription: "1929" -- On label. "Gregory Bateson, 'Naven' and other works" -- In red ink.; Sarah Chinnery no.: Part 2.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic-vn4506462
Portrait of the anthropologist Professor Hortense Powdermaker from Queens, New York, in New Guinea, 1929 [picture] /
No full textPart of the collection: Sarah Chinnery photographic collection of New Guinea, England and Australia.; Inscriptions: "Professor Hortense Powdermaker, (Queens N.Y., U.S.A.) 'Life in Lesso [i.e. Lesu]' and other works" --In red ink. "1929" -- In pencil.; Professor Hortense Powdermaker, American anthropologist 1929 research in Lesu, New Ireland, New Guinea. Author of "Life in Lesu" and other works. -- Accompanying notes from family.; Sarah Chinnery no.: Part 2.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic-vn4506463
- …
