Gnanou Sudha | Pondicherry Engineeing College (original) (raw)
Papers by Gnanou Sudha
2008 38th Annual Frontiers in Education Conference, 2008
Traditionally, real-time systems are built for a very small set of mission-critical applications ... more Traditionally, real-time systems are built for a very small set of mission-critical applications like space crafts, avionics and other distributed control systems. The various steps in building such systems include, characterizing the workload, designing scheduling algorithms and performing schedulability analysis. Conventional teaching methodologies for real-time systems have primarily focused on these topics and the choice is completely justified for the targeted traditional real-time systems. However with the evolution of small scale real-time embedded systems like cell phones, PDAs, sensor motes and other portable control systems primarily driven by a Real-Time Operating System (RTOS), the conventional teaching methods fall short in several ways. This is because, building such real-time embedded systems poses certain different design and implementation challenges branching out of the severe resource constraints that these devices should operate under.
Journal of Biomedical Optics, 2005
Tissue images obtained at deeper depths lack significant contrast. To enhance the contrast of the... more Tissue images obtained at deeper depths lack significant contrast. To enhance the contrast of these images and to increase the visibility of subsurface tissues, a method is proposed. This technique is based on the principle that photons at longer wavelengths penetrate deeper than photons at shorter wavelengths. In this technique, images in the original and orthogonal polarized states are recorded with the source illumination in linear polarized state at two different wavelengths. Image subtraction of a fraction of the copolarized image from the perpendicular polarized state is done on these images. The images obtained after the first processing are subjected to the next image subtraction where the shorter wavelength image is subtracted from the longer wavelength image. Monte Carlo simulations show that the resultant image has marked contrast up to 2.5 cm.
Journal of Visual Communication and Image Representation, 2016
Multimedia Tools and Applications, 2015
Journal of Bioinformatics and Intelligent Control, 2015
Biomedical Signal Processing and Control, 2016
IET Wireless Sensor Systems, 2015
Advances in Intelligent Systems and Computing, 2013
2008 16th IEEE International Conference on Networks, 2008
Wireless ad hoc networks consist of nodes which can communicate with each other in a peer-to-peer... more Wireless ad hoc networks consist of nodes which can communicate with each other in a peer-to-peer fashion over single hop or multi hops without any fixed infrastructure such as access point or base station. In flat topology there is no topology management concept and all the nodes participate in routing. In this paper the task of topology management for ad hoc networks is implemented using Routing Intelligence Mobile Agent (MARI) Algorithm and the performance is compared with that of flat topology network having same number nodes. In the proposed scheme the nodes with higher power levels among their one hop neighbors are selected as MARI nodes and these participate in routing. To provide communication between any two MARI nodes a midway node is selected. Only these MARI and midway nodes will stay awake and the remaining nodes will be in sleep mode so that there is power saving. In this paper, the power consumption and back off delay performance of a flat network and a network employing MARI algorithm are compared. The proposed MARI topology management is found to have less power consumption and less back-off delay as compared with flat topology.
IFMBE Proceedings, 2008
NA Abu Osman, F. Ibrahim, WAB Wan Abas, HS Abd Rahman, HN Ting (Eds.): Biomed 2008, Proceedings 2... more NA Abu Osman, F. Ibrahim, WAB Wan Abas, HS Abd Rahman, HN Ting (Eds.): Biomed 2008, Proceedings 21, pp. 683686, 2008 www.springerlink.com © Springer-Verlag Berlin Heidelberg 2008 ... Studies On Skin Temperature Changes On A Diabetic Foot
SpringerPlus, 2014
In recent years, Reversible logic has emerged as a major area of research due to its ability to r... more In recent years, Reversible logic has emerged as a major area of research due to its ability to reduce the power dissipation which is the main requirement in the low power digital circuit design. It has wide applications like low power CMOS design, Nano-technology, Digital signal processing, Communication, DNA computing and Optical computing. Floating-point operations are needed very frequently in nearly all computing disciplines, and studies have shown floating-point addition/subtraction to be the most used floating-point operation. However, few designs exist on efficient reversible BCD subtractors but no work on reversible floating point subtractor. In this paper, it is proposed to present an efficient reversible single precision floating-point subtractor. The proposed design requires reversible designs of an 8-bit and a 24-bit comparator unit, an 8-bit and a 24-bit subtractor, and a normalization unit. For normalization, a 24-bit Reversible Leading Zero Detector and a 24-bit reversible shift register is implemented to shift the mantissas. To realize a reversible 1-bit comparator, in this paper, two new 3x3 reversible gates are proposed The proposed reversible 1-bit comparator is better and optimized in terms of the number of reversible gates used, the number of transistor count and the number of garbage outputs. The proposed work is analysed in terms of number of reversible gates, garbage outputs, constant inputs and quantum costs. Using these modules, an efficient design of a reversible single precision floating point subtractor is proposed. Proposed circuits have been simulated using Modelsim and synthesized using Xilinx Virtex5vlx30tff665-3. The total on-chip power consumed by the proposed 32-bit reversible floating point subtractor is 0.410 W.
2013 International Conference on Communication and Signal Processing, 2013
IET Computer Vision, 2014
Advances in Intelligent Systems and Computing, 2013
International Journal of Multimedia Intelligence and Security, 2013
2008 16th International Conference on Advanced Computing and Communications, 2008
Page 1. Encryption of Digital Video Based on Lorenz Chaotic System Hephzibah Kezia1, Gnanou Flore... more Page 1. Encryption of Digital Video Based on Lorenz Chaotic System Hephzibah Kezia1, Gnanou Florence Sudha2 Department of Electronics and Communication Engg, , Pondicherry Engineering College,Pondicherry-605014 ...
A noninvasive investigation on severity of dengue was conducted on 44 hospitalized Dengue Hemorrh... more A noninvasive investigation on severity of dengue was conducted on 44 hospitalized Dengue Hemorrhagic Fever (DHF) patients, Male and Female aged between 3 to 14 years using Multifrequency Bioelectrical Impedance Analysis (MF-BIA). Among the 44 patients, 30 patients were confirmed with NS1 positive at the time of admission, whose blood investigations such as Haematocrit (HCT), Platelet (PLT) count, Aspartate Aminotransferase (AST) level and Alanine aminotransferase (ALT) level was taken for classification of risk under low risk and high risk DHF. For comparison, BIA of 53 healthy controls was also taken. Statistical analysis with ANOVA of BIA on healthy controls identifies reactance as a better indicator. Study shows that reactance at 100 KHz gives significant difference (p < 0.27 on day 1) between control and DHF risk groups and also the reactance shows good correlation (Pearson Correlation Coefficient r=0.18) with the blood investigation results which can be used for classifying degree of risk. In addition, statistical analysis of reactance of other fever indicate significant difference with DHF.
2008 38th Annual Frontiers in Education Conference, 2008
Traditionally, real-time systems are built for a very small set of mission-critical applications ... more Traditionally, real-time systems are built for a very small set of mission-critical applications like space crafts, avionics and other distributed control systems. The various steps in building such systems include, characterizing the workload, designing scheduling algorithms and performing schedulability analysis. Conventional teaching methodologies for real-time systems have primarily focused on these topics and the choice is completely justified for the targeted traditional real-time systems. However with the evolution of small scale real-time embedded systems like cell phones, PDAs, sensor motes and other portable control systems primarily driven by a Real-Time Operating System (RTOS), the conventional teaching methods fall short in several ways. This is because, building such real-time embedded systems poses certain different design and implementation challenges branching out of the severe resource constraints that these devices should operate under.
Journal of Biomedical Optics, 2005
Tissue images obtained at deeper depths lack significant contrast. To enhance the contrast of the... more Tissue images obtained at deeper depths lack significant contrast. To enhance the contrast of these images and to increase the visibility of subsurface tissues, a method is proposed. This technique is based on the principle that photons at longer wavelengths penetrate deeper than photons at shorter wavelengths. In this technique, images in the original and orthogonal polarized states are recorded with the source illumination in linear polarized state at two different wavelengths. Image subtraction of a fraction of the copolarized image from the perpendicular polarized state is done on these images. The images obtained after the first processing are subjected to the next image subtraction where the shorter wavelength image is subtracted from the longer wavelength image. Monte Carlo simulations show that the resultant image has marked contrast up to 2.5 cm.
Journal of Visual Communication and Image Representation, 2016
Multimedia Tools and Applications, 2015
Journal of Bioinformatics and Intelligent Control, 2015
Biomedical Signal Processing and Control, 2016
IET Wireless Sensor Systems, 2015
Advances in Intelligent Systems and Computing, 2013
2008 16th IEEE International Conference on Networks, 2008
Wireless ad hoc networks consist of nodes which can communicate with each other in a peer-to-peer... more Wireless ad hoc networks consist of nodes which can communicate with each other in a peer-to-peer fashion over single hop or multi hops without any fixed infrastructure such as access point or base station. In flat topology there is no topology management concept and all the nodes participate in routing. In this paper the task of topology management for ad hoc networks is implemented using Routing Intelligence Mobile Agent (MARI) Algorithm and the performance is compared with that of flat topology network having same number nodes. In the proposed scheme the nodes with higher power levels among their one hop neighbors are selected as MARI nodes and these participate in routing. To provide communication between any two MARI nodes a midway node is selected. Only these MARI and midway nodes will stay awake and the remaining nodes will be in sleep mode so that there is power saving. In this paper, the power consumption and back off delay performance of a flat network and a network employing MARI algorithm are compared. The proposed MARI topology management is found to have less power consumption and less back-off delay as compared with flat topology.
IFMBE Proceedings, 2008
NA Abu Osman, F. Ibrahim, WAB Wan Abas, HS Abd Rahman, HN Ting (Eds.): Biomed 2008, Proceedings 2... more NA Abu Osman, F. Ibrahim, WAB Wan Abas, HS Abd Rahman, HN Ting (Eds.): Biomed 2008, Proceedings 21, pp. 683686, 2008 www.springerlink.com © Springer-Verlag Berlin Heidelberg 2008 ... Studies On Skin Temperature Changes On A Diabetic Foot
SpringerPlus, 2014
In recent years, Reversible logic has emerged as a major area of research due to its ability to r... more In recent years, Reversible logic has emerged as a major area of research due to its ability to reduce the power dissipation which is the main requirement in the low power digital circuit design. It has wide applications like low power CMOS design, Nano-technology, Digital signal processing, Communication, DNA computing and Optical computing. Floating-point operations are needed very frequently in nearly all computing disciplines, and studies have shown floating-point addition/subtraction to be the most used floating-point operation. However, few designs exist on efficient reversible BCD subtractors but no work on reversible floating point subtractor. In this paper, it is proposed to present an efficient reversible single precision floating-point subtractor. The proposed design requires reversible designs of an 8-bit and a 24-bit comparator unit, an 8-bit and a 24-bit subtractor, and a normalization unit. For normalization, a 24-bit Reversible Leading Zero Detector and a 24-bit reversible shift register is implemented to shift the mantissas. To realize a reversible 1-bit comparator, in this paper, two new 3x3 reversible gates are proposed The proposed reversible 1-bit comparator is better and optimized in terms of the number of reversible gates used, the number of transistor count and the number of garbage outputs. The proposed work is analysed in terms of number of reversible gates, garbage outputs, constant inputs and quantum costs. Using these modules, an efficient design of a reversible single precision floating point subtractor is proposed. Proposed circuits have been simulated using Modelsim and synthesized using Xilinx Virtex5vlx30tff665-3. The total on-chip power consumed by the proposed 32-bit reversible floating point subtractor is 0.410 W.
2013 International Conference on Communication and Signal Processing, 2013
IET Computer Vision, 2014
Advances in Intelligent Systems and Computing, 2013
International Journal of Multimedia Intelligence and Security, 2013
2008 16th International Conference on Advanced Computing and Communications, 2008
Page 1. Encryption of Digital Video Based on Lorenz Chaotic System Hephzibah Kezia1, Gnanou Flore... more Page 1. Encryption of Digital Video Based on Lorenz Chaotic System Hephzibah Kezia1, Gnanou Florence Sudha2 Department of Electronics and Communication Engg, , Pondicherry Engineering College,Pondicherry-605014 ...
A noninvasive investigation on severity of dengue was conducted on 44 hospitalized Dengue Hemorrh... more A noninvasive investigation on severity of dengue was conducted on 44 hospitalized Dengue Hemorrhagic Fever (DHF) patients, Male and Female aged between 3 to 14 years using Multifrequency Bioelectrical Impedance Analysis (MF-BIA). Among the 44 patients, 30 patients were confirmed with NS1 positive at the time of admission, whose blood investigations such as Haematocrit (HCT), Platelet (PLT) count, Aspartate Aminotransferase (AST) level and Alanine aminotransferase (ALT) level was taken for classification of risk under low risk and high risk DHF. For comparison, BIA of 53 healthy controls was also taken. Statistical analysis with ANOVA of BIA on healthy controls identifies reactance as a better indicator. Study shows that reactance at 100 KHz gives significant difference (p < 0.27 on day 1) between control and DHF risk groups and also the reactance shows good correlation (Pearson Correlation Coefficient r=0.18) with the blood investigation results which can be used for classifying degree of risk. In addition, statistical analysis of reactance of other fever indicate significant difference with DHF.