The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
A. Koch - One of the best experts on this subject based on the ideXlab platform.
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FPGA - Structured Design Implementation - A Strategy for Implementing Regular Datapaths on FPGAs
Proceedings of the 1996 ACM fourth international symposium on Field-programmable gate arrays - FPGA '96, 1996Co-Authors: A. KochAbstract:SDI is a strategy for the efficient implementation of regular datapaths with fixed topology on FPGAs. It employs parametric module generators, a floorplanner based on a genetic algorithm, and a circuit Compaction Phase through local technology mapping and placement by ILP models. Initial results promise faster layouts than with general algorithms.
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Structured Design Implementation - A Strategy for Implementing Regular Datapaths on FPGAs
Fourth International ACM Symposium on Field-Programmable Gate Arrays, 1996Co-Authors: A. KochAbstract:SDI is a strategy for the efficient implementation of regular datapaths with fixed topology on FPGAs. It employs parametric module generators, a floorplanner based on a genetic algorithm, and a circuit Compaction Phase through local technology mapping and placement by ILP models. Initial results promise faster layouts than with general algorithms.
P. Marwedel - One of the best experts on this subject based on the ideXlab platform.
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Time-constrained code Compaction for DSPs
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 1997Co-Authors: R. Leupers, P. MarwedelAbstract:This paper addresses instruction-level parallelism in code generation for digital signal processors (DSPs). In the presence of potential parallelism, the task of code generation includes code Compaction, which parallelizes primitive processor operations under given dependency and resource constraints. Furthermore, DSP algorithms in most cases are required to guarantee real-time response. Since the exact execution speed of a DSP program is only known after Compaction, real-time constraints should be taken into account during the Compaction Phase. While previous DSP code generators rely on rigid heuristics for Compaction, we propose a novel approach to exact local code Compaction based on an integer programming (IP) model, which handles time constraints. Due to a general problem formulation, the IP model also captures encoding restrictions and handles instructions having alternative encodings and side effects and therefore applies to a large class of instruction formats. Capabilities and limitations of our approach are discussed for different DSPs.
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Time-constrained code Compaction for DSPs
Proceedings of the Eighth International Symposium on System Synthesis, 1995Co-Authors: R. Leupers, P. MarwedelAbstract:DSP algorithms are, in most cases, subject to hard real-time constraints. In the case of programmable DSPs, meeting those constraints must be ensured by appropriate code generation techniques. For processors offering instruction-level parallelism, the task of code generation includes code Compaction. The exact timing behavior of a DSP program is only known after Compaction. Therefore, real-time constraints should be taken into account during the Compaction Phase. While most known DSP code generators rely on rigid heuristics for that Phase, this paper proposes a novel approach to local code Compaction based on an integer programming model, which obeys exact timing constraints. Due to a general problem formulation, the model also obeys encoding restrictions and possible side-effects.
Natalia Wilke - One of the best experts on this subject based on the ideXlab platform.
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hopanoids like sterols modulate dynamics Compaction Phase segregation and permeability of membranes
Biochimica et Biophysica Acta, 2019Co-Authors: Agustin Mangiarotti, Dario M Genovese, Christoph A Naumann, Mariela R Monti, Natalia WilkeAbstract:Abstract In recent years, hopanoids, a group of pentacyclic compounds found in bacterial membranes, are in the spotlight since it was proposed that they induce order in lipid membranes in a similar way cholesterol do in eukaryotes, despite their structural differences. We studied here whether diplopterol (an abundant hopanoid) promoted similar effects on model membranes as sterols do. We analyzed the Compaction, dynamics, Phase segregation, permeability and compressibility of model membranes containing diplopterol, and compared with those containing sterols from animals, plants and fungi. We also tested the effect that the incubation with diplopterol had on hopanoid-lacking bacteria. Our results show that diplopterol induces Phase segregation, increases lipid Compaction, and decreases permeability on phospholipid membranes, while retaining membrane fluidity and compressibility. Furthermore, the exposition to this hopanoid decreases the permeability of the opportunistic pathogen Pseudomonas aeruginosa and increases the resistance to antibiotics. All effects promoted by diplopterol were similar to those generated by the sterols. Our observations add information on the functional significance of hopanoids as molecules that play an important role in membrane organization and dynamics in model membranes and in a bacterial system.
R. Leupers - One of the best experts on this subject based on the ideXlab platform.
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Time-constrained code Compaction for DSPs
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 1997Co-Authors: R. Leupers, P. MarwedelAbstract:This paper addresses instruction-level parallelism in code generation for digital signal processors (DSPs). In the presence of potential parallelism, the task of code generation includes code Compaction, which parallelizes primitive processor operations under given dependency and resource constraints. Furthermore, DSP algorithms in most cases are required to guarantee real-time response. Since the exact execution speed of a DSP program is only known after Compaction, real-time constraints should be taken into account during the Compaction Phase. While previous DSP code generators rely on rigid heuristics for Compaction, we propose a novel approach to exact local code Compaction based on an integer programming (IP) model, which handles time constraints. Due to a general problem formulation, the IP model also captures encoding restrictions and handles instructions having alternative encodings and side effects and therefore applies to a large class of instruction formats. Capabilities and limitations of our approach are discussed for different DSPs.
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Time-constrained code Compaction for DSPs
Proceedings of the Eighth International Symposium on System Synthesis, 1995Co-Authors: R. Leupers, P. MarwedelAbstract:DSP algorithms are, in most cases, subject to hard real-time constraints. In the case of programmable DSPs, meeting those constraints must be ensured by appropriate code generation techniques. For processors offering instruction-level parallelism, the task of code generation includes code Compaction. The exact timing behavior of a DSP program is only known after Compaction. Therefore, real-time constraints should be taken into account during the Compaction Phase. While most known DSP code generators rely on rigid heuristics for that Phase, this paper proposes a novel approach to local code Compaction based on an integer programming model, which obeys exact timing constraints. Due to a general problem formulation, the model also obeys encoding restrictions and possible side-effects.
Agustin Mangiarotti - One of the best experts on this subject based on the ideXlab platform.
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hopanoids like sterols modulate dynamics Compaction Phase segregation and permeability of membranes
Biochimica et Biophysica Acta, 2019Co-Authors: Agustin Mangiarotti, Dario M Genovese, Christoph A Naumann, Mariela R Monti, Natalia WilkeAbstract:Abstract In recent years, hopanoids, a group of pentacyclic compounds found in bacterial membranes, are in the spotlight since it was proposed that they induce order in lipid membranes in a similar way cholesterol do in eukaryotes, despite their structural differences. We studied here whether diplopterol (an abundant hopanoid) promoted similar effects on model membranes as sterols do. We analyzed the Compaction, dynamics, Phase segregation, permeability and compressibility of model membranes containing diplopterol, and compared with those containing sterols from animals, plants and fungi. We also tested the effect that the incubation with diplopterol had on hopanoid-lacking bacteria. Our results show that diplopterol induces Phase segregation, increases lipid Compaction, and decreases permeability on phospholipid membranes, while retaining membrane fluidity and compressibility. Furthermore, the exposition to this hopanoid decreases the permeability of the opportunistic pathogen Pseudomonas aeruginosa and increases the resistance to antibiotics. All effects promoted by diplopterol were similar to those generated by the sterols. Our observations add information on the functional significance of hopanoids as molecules that play an important role in membrane organization and dynamics in model membranes and in a bacterial system.