Dedicated systems with hardware and software tailored for the application provide tremendous performance improvements over systems based on general-purpose hardware. The authors describe SIERA, a system being develope...
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Dedicated systems with hardware and software tailored for the application provide tremendous performance improvements over systems based on general-purpose hardware. The authors describe SIERA, a system being developed for rapid-prototyping of the hardware and software components of such dedicated real-time systems starting from a high-level description. Based on their experience of automated generation at the chip level which they developed with the LAGER system, they identify two distinct phases in the design process. The first is the process of mapping the high-level system specification to a set of interacting hardware and software modules. The second is the generation of these software and hardware modules. A mix of mapping, synthesis and library based techniques is being utilized to accomplish these tasks.< >
In article, it is stated principles of creation of programmed logical integrated circuits and digital signal processing methods. Are resulted on a specific example process of formation code sequence the meaning code o...
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ISBN:
(数字)9781728125640
ISBN:
(纸本)9781728125657
In article, it is stated principles of creation of programmed logical integrated circuits and digital signal processing methods. Are resulted on a specific example process of formation code sequence the meaning code of required station in signal transmission devices in fiber optical systems.
Four spatial/spectral imaging diagnostics show relativistic self-channeling of a 25 TW, 1 ps laser pulse limited only by the length of the gas-jet target. Collective scattering of a probe beam provides a spectrally-re...
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Four spatial/spectral imaging diagnostics show relativistic self-channeling of a 25 TW, 1 ps laser pulse limited only by the length of the gas-jet target. Collective scattering of a probe beam provides a spectrally-resolved image of large-amplitude plasma waves indicating an intensity >10/sup 18/ W/cm/sup 2/ at 4 mm from the laser focus.
Folding is a scheme to reduce the silicon area in programmablelogic Array (PLA) design. Since optimum folding is an NP-complete problem, methods for estimating potential area saving are desirable. In the case of row ...
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ISBN:
(纸本)9780818600265
Folding is a scheme to reduce the silicon area in programmablelogic Array (PLA) design. Since optimum folding is an NP-complete problem, methods for estimating potential area saving are desirable. In the case of row folding, both the upper and lower bounds for the saved area ratio d are derived in the paper. By applying the well-known Rent's relationship on a proposed partition model for PLA, we can show that [formula omitted] where r is the Rent's exponent in the range 0 ≤ r ≤ 1. Four examples are given to validate the theoretical prediction. Finally, possible refinement and open problems are also mentioned.
Glutathione peroxidase (GPx) and other selenoproteins (SeP) are involved in the detoxification of reactive oxygen species (ROS). ROS is implicated in preeclampsia (PE). Generation of ROS and antioxidant effect of tota...
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Glutathione peroxidase (GPx) and other selenoproteins (SeP) are involved in the detoxification of reactive oxygen species (ROS). ROS is implicated in preeclampsia (PE). Generation of ROS and antioxidant effect of total GPx in women with PE was estimated. Since we found a significant decrease in total GPx level of women with PE, we were motivated to characterize at a molecular level SeP present in GPx (GPx 1-4, 6). Other SeP including selenoprotein P (SEPP), selenoprotein S (SELS) and thioredoxin reductase (TXNRD) were also analyzed since literature suggests that they also play a critical role in down regulation of oxidative stress (OS) in PE. Non SeP GPx were also analyzed for comparison purposes. Serum GPx was measured in venous blood samples of women with PE (Group A; n=25) and normotensive pregnant women (Group B; n=32) spectrophotometrically. Intracellular ROS generated by peripheral blood mononuclear cells was measured using flow cytometry. Molecular characterization of the SeP was done by sequence analysis at nucleotide, codon and amino acid levels. Intracellular ROS level was significantly increased in Group A as compared to Group B. ROS and GPx were significantly negatively correlated in both Group A and Group B. SePs involved in PE, primarily belonged to two nucleotide biasing groups, AT and GC. Dinucleotide usage and codon preferences in these two groups were found to be in accordance with their respective compositional bias. Such nucleotide compositional bias seemed to be major factor driving their selective codon choices. These SePs differ within themselves with respect to their relative amino acid abundance.
The authors describe a BiCMOS programmable gate array (PGA) with subnanosecond logic block delay and low power consumption. Each logic block can implement any Boolean function of three inputs, a D-latch, or an SR-latc...
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The authors describe a BiCMOS programmable gate array (PGA) with subnanosecond logic block delay and low power consumption. Each logic block can implement any Boolean function of three inputs, a D-latch, or an SR-latch. The PGA is supported by an advanced design environment, which includes schematic capture, interactive functional simulation, logic minimization, and technology mapping.< >
The digital systems area is both a target of technological innovations and a common requirement in many engineering fields. Important technological trends in this area are the use of hardware description languages as ...
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The digital systems area is both a target of technological innovations and a common requirement in many engineering fields. Important technological trends in this area are the use of hardware description languages as a design tool and the continuous improvement of the fabrication technology. Consequently, industry has a high demand for new graduating engineers with qualifications such as: self-guided learning, design skills and teamwork skills. This paper describes the experience achieved by formally incorporating active and cooperative learning strategies to the second-year digital systems course based upon the redesign framework implemented at ITESM Campus Monterrey, Mexico. The digital systems course material is naturally suitable for active and cooperative learning activities. The strategies described in this paper exploit the nobility of the course material by using technological support such as Verilog and PLD/PLA programming tools. The expected benefits were obtained from special course evaluations and professor experiences.
This paper describes LOGMIN, a new, interactive computer aided logic design tool. LOGMIN automates the increasingly complex problems of VLSI PLA design which has made the specification, manipulation, minimization and ...
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This paper describes LOGMIN, a new, interactive computer aided logic design tool. LOGMIN automates the increasingly complex problems of VLSI PLA design which has made the specification, manipulation, minimization and generation of PLAs difficult to do by hand. LOGMIN allows the specification of both combinational functions and sequential machines. Combinational functions may be described using a variety of operators, intermediate variables or PLA code. A State Machine Description Language (SMDL) was developed for the specification of sequential machines. This paper describes the background and motivation for LOGMIN, the algorithms used and the grammar for SMDL. Several examples are provided.
The design of a microprogram sequencer with concurrent error detection is described. The error detection scheme involves generation of signatures based on past and present sequencer outputs; these signatures are compa...
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The design of a microprogram sequencer with concurrent error detection is described. The error detection scheme involves generation of signatures based on past and present sequencer outputs; these signatures are compared frequently against expected values. Software tools for signature assignment are described. Testing results using prototype parts are summarized.< >
Congestion is still a great problem which Internet faces. Locating congestion links is very important to execute traffic engineering and mitigate network congestion. Firstly,congestion localization model was presented...
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ISBN:
(纸本)9781424442232
Congestion is still a great problem which Internet faces. Locating congestion links is very important to execute traffic engineering and mitigate network congestion. Firstly,congestion localization model was presented. After introducing AS performance matrix model, a kind of congestion detection algorithm based on threshold was put forward. Combining AS performance matrix with topology information, congested link localization algorithm was put forward. Simulation results show the algorithm has higher detection rate and lower false positive rate under different topology sizes and congestion levels.
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