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Scratchpad sharing strategies for multiprocess embedded systems: A first approach
 in Proc. ESTMEDIA, 2005
"... Portable embedded systems require diligence in managing their energy consumption. Thus, power efficient processors coupled with onchip memories (e.g. caches, scratchpads) are the base of today’s portable devices. Scratchpads are more energy efficient than caches but require software support for thei ..."
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Cited by 11 (1 self)
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Portable embedded systems require diligence in managing their energy consumption. Thus, power efficient processors coupled with onchip memories (e.g. caches, scratchpads) are the base of today’s portable devices. Scratchpads are more energy efficient than caches but require software support for their utilization. Portable devices ’ applications consist of multiple processes for different tasks. However, all the previous scratchpad allocation approaches only consider single process applications. In this paper, we propose a set of optimal strategies to reduce the energy consumption of applications by sharing the scratchpad among multiple processes. The strategies assign both code and data elements to the scratchpad and result in average total energy reductions of 9%20 % against a published single process approach. Furthermore, the strategies generate Paretooptimal curves for the applications allowing design time exploration of energy/scratchpad size tradeoffs. 1.
Comparison of sensitivity to color changes in natural and phasescrambled scenes
 Journal of the Optical Society of America A
, 2008
"... Traditionally, thresholds for detecting photometric changes have been measured by using stimuli such as disks or gratings and accounted for in terms of relatively lowlevel mechanisms in the visual pathway. Therefore one might not expect the higherorder structures that characterize natural scenes t ..."
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Cited by 3 (1 self)
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Traditionally, thresholds for detecting photometric changes have been measured by using stimuli such as disks or gratings and accounted for in terms of relatively lowlevel mechanisms in the visual pathway. Therefore one might not expect the higherorder structures that characterize natural scenes to influence thresholds for detecting uniform photometric changes. We compared thresholds for detecting uniform photometric changes for natural and phasescrambled versions of images of natural scenes. The chromaticity and luminance of every pixel was represented as a vector in a modified version of the MacLeod–Boynton color space and was translated, rotated, or compressed within that color space. Thresholds for all types of transformation were significantly lower in the raw compared with phasescrambled scenes, and we attribute this to the influence of
Evaluating the Complexity of Mathematical Problems. Part 1
, 2009
"... In this paper we provide a computational method for evaluating in a uniform way the complexity of a large class of mathematical problems. The method, which is inspired by NKS1, is based on the possibility to completely describe complex mathematical problems, like the Riemann hypothesis, in terms of ..."
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Cited by 1 (0 self)
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In this paper we provide a computational method for evaluating in a uniform way the complexity of a large class of mathematical problems. The method, which is inspired by NKS1, is based on the possibility to completely describe complex mathematical problems, like the Riemann hypothesis, in terms of (very) simple programs. The method is illustrated on a variety of examples coming from different areas of mathematics and its power and limits are studied.
Predicting Improper Fractional Base Integer Characteristics
"... Combinatorics and algebra have been used to find equations for the smallest integer with a certain length in an integral base. However, improper fractional bases have not been explored in much depth since their discovery in the 1930s. In this study, I discovered an original formula for the smallest ..."
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Combinatorics and algebra have been used to find equations for the smallest integer with a certain length in an integral base. However, improper fractional bases have not been explored in much depth since their discovery in the 1930s. In this study, I discovered an original formula for the smallest integer with a specific digit length in an improper fractional base. I wrote an original computer program to convert integers from base 10 to any improper fractional base. I used this program to find 100 combinations of length, improper fractional base, and the smallest integer with that length in that fractional base. I used graphing, combinatorics, and difference equations to attempt to find a method to predict the smallest integer with a specific length in an improper fractional base. I then used number theory to evaluate the divisibility requirements
On the Detection of FrequencySpectraBased Chipless RFID Using UWB Impulsed Interrogation
"... Abstract—A novel approach is presented to accurately estimate the resonant features of a multipatch backscatterbased chipless radio frequency identification (RFID) tag. An ultrawideband impulse radar (UWBIR)based reader interrogates the chipless tag with a UWB pulse, and the received backscatter ..."
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Abstract—A novel approach is presented to accurately estimate the resonant features of a multipatch backscatterbased chipless radio frequency identification (RFID) tag. An ultrawideband impulse radar (UWBIR)based reader interrogates the chipless tag with a UWB pulse, and the received backscatter is analyzed in thetimedomain.Thekeycomponents constituting the backscattered signal, the structural mode, and the antenna mode are identified, and their spectral content are analyzed. Analysis shows that the antenna mode backscatter contains the information carrying signal while the structural mode backscatter contains no information about the tag. A semianalytical model is developed to explain the behavior of the signal backscattered from the chipless RFID tag. Simulation and semianalytical results are validated by experimental measurements obtained in an anechoic chamber environment using a 4b multipatch chipless RFID tag. The new method does not rely on calibration tags for operation and has a greater degree of freedom in the orientation of tags with respect to a reader. A novel method, selective spectral interrogation (SSI), that uses a set of interrogation pulses to extract information bits stored in the spectral signature of the chipless tag is also introduced. Index Terms—Backscatter, chipless radio frequency identification (RFID), ultrawideband impulse radar (UWBIR), time domain. I.
Mathematical Problems. Part 1 ∗
, 2008
"... In this paper we provide a computational method for evaluating in a uniform way the complexity of a large class of mathematical problems. The method is illustrated on a variety of examples coming from different areas of mathematics and its power and limits are studied. 1 ..."
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In this paper we provide a computational method for evaluating in a uniform way the complexity of a large class of mathematical problems. The method is illustrated on a variety of examples coming from different areas of mathematics and its power and limits are studied. 1