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Search Results: 1 - 10 of 146682 matches for " Chougule Amit B "
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Preserving Privacy Using Gradient Descent Methods Applied for Neural Network with Distributed Datasets
Sachin P. Yadav,Amit B.Chougule
International Journal of Computer Science Issues , 2013,
Abstract: The learning problems have to be concerned about distributed input data, because of gradual expansion of distributed computing environment. It is important to address the privacy concern of each data holder by extending the privacy preservation concept to original learning algorithms, to enhance co-operations in learning. In this project, focus is on protecting the privacy in significant learning model i.e. Multilayer Back Propagation Neural Network using Gradient Descent Methods. For protecting the privacy of the data items (concentration is towards Vertically Partitioned Data and Horizontally Partitioned Data), semi honest model and underlying security of El Gamal Scheme is referred [7].
Efficient Hardware Design and Implementation of AES Cryptosystem
Pravin B. Ghewari,Mrs. Jaymala K. Patil,Amit B. Chougule
International Journal of Engineering Science and Technology , 2010,
Abstract: We propose an efficient hardware architecture design & implementation of Advanced Encryption Standard (AES)-Rijndael cryptosystem. The AES algorithm defined by the National Institute of Standard and Technology(NIST) of United States has been widely accepted. The cryptographic algorithms can be implemented with software or built with pure hardware. However Field Programmable Gate Arrays (FPGA) implementation offers quicker solution and can be easily upgraded to incorporate any protocol changes. This contribution investigates the AES encryption and decryption cryptosystem with regard to FPGA and Very High Speed Integrated Circuit Hardware Description language (VHDL). Optimized and Synthesizable VHDL code is developed for theimplementation of both 128- bit data encryption and decryption process. Xilinx ISE 8.1 software is used for simulation. Each program is tested with some of the sample vectors provided by NIST and output results are perfect with minimal delay. The throughput reaches the value of 352 Mbit/sec for both encryption and decryption process with Device XCV600 of Xilinx Virtex Family.
Sharing File System for Campus Wide-Workgroups
Hangad Abdulkadar J,Avantkar Amol D,Chougule Amit B
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: This paper describes the implementation of a file system based distributed authoring system forcampus-wide workgroups .In this we overcome the difficulty in changing a single document by differentgroup members. Prior approaches operate on only specific documents but our system operates on any type ofdocument. Each group member maintains one updatable copy of shared document. We also hoard read-onlycopies of each of these updatable copies in any other group member’s node. All these copies are propagatedto other group members at a rate that is solely dictated by the wireless user availability. Our user space filesystem prototype exhibits acceptable file system performance. A subjective evaluation showed that themoderation operation was intuitive for students.
An Analysis of Weakly Consistent Replication Systems in an Active Distributed Network
Amit Chougule,Pravin Ghewari
International Journal of Computer Science Issues , 2011,
Abstract: With the sudden increase in heterogeneity and distribution of data in wide-area networks, more flexible, efficient and autonomous approaches for management and data distribution are needed. In recent years, the proliferation of inter-networks and distributed applications has increased the demand for geographically-distributed replicated databases. The architecture of Bayou provides features that address the needs of database storage of world-wide applications. Key is the use of weak consistency replication among autonomous machines. The protocol carries out pair wise reconciliation between the replicas. It enables replica convergence towards consistency. The paper presents an analysis of weakly consistent replication system in an active distributed network.
Variable Chunk Based Parallel Switching To Minimizing File Download Time in P2P Network
Amit Chougule,Shambhuraj Deshmukh
International Journal of Computer Science Issues , 2011,
Abstract: The Peer-to-peer (P2P) computing has been one of the emerging technologies in distributed file sharing. Experimental studies show that for a file download, service capacity fluctuation takes minutes to several hours. For a P2P one of the fundamental performances metric is the average download time. The common approach to analyse the average download time is average service capacity. Heterogeneity and fluctuation have significant impact on service capacity and hence the averages download time. Random Chunk Based Switching is one of the file downloading scheme where, the file to be downloaded is divided into many chunks but the short comes of this scheme are user sequentially download one chunk at a time, also if user gets stuck in a low service capacity peer, downloading a fixed amount of bytes from that peer may take a long time and here chunk size remains fixed and it does not change with time. We propose a new approach where chunk size changes with time and our model provides no. Of parallel connections which changes with hardware utilization which overcomes the shortcomings of Random Chunk Based Switching.
Effect of Camphor Sulfonic Acid Doping on Structural, Morphological, Optical and Electrical Transport Properties on Polyaniline-ZnO Nanocomposites  [PDF]
S. L. Patil, M. A. Chougule, S. G. Pawar, Shashwati Sen, V. B. Patil
Soft Nanoscience Letters (SNL) , 2012, DOI: 10.4236/snl.2012.23009
Abstract: In the present work, we report on effect of camphor sulfonic acid (CSA) doping on polyaniline-ZnO (50%) nanocomposites prepared by spin coating method on glass substrates. The XRD analysis revealed that the addition of CSA has no effect on crystallinity of PANi-ZnO nanocomposites. Surface morphological studies (SEM) showed that CSA has a strong effect on morphology of PANi-ZnO. The FTIR & UV-Vis spectroscopy confirmed the interaction between CSA and PANi-ZnO nanocomposite. DC electrical conductivity studies showed an increase in conductivity of PANi-ZnO nanocomposites by one order due to addition of CSA (10% - 50%).
Implementation and Analysis of EFRS Technique for Intrusion Tolerance in Distributed Systems
A B Chougule,G A Patil
International Journal of Computer Science Issues , 2011,
Abstract: This paper includes designing and implementing a system that uses encryption-fragmentationreplication- scattering for the purpose of developing secure and dependable data storage within a distributed system. The system will consist of one central node which is assumed to be trusted and multiple storage nodes. Data is collected at the central node, which is then encrypted followed by fragmentation. Data fragments then undergo a hash function to give unique hash value of each fragment. These fragments are then replicated and scattered over the network. Thus, the system continues to provide service even in case of failure of some storage nodes.
STRUCTURAL, ELECTRICAL AND MAGNETIC PROPERTIES OF Y[Li0.5Ni0.75-x/2Znx/2Fe2O4] + (1-y) Ba0.5Sr0.5TiO3 ME COMPOSITES
S.U. DURGADSIMI,S.S. CHOUGULE,,B.K. CHOUGULE,,S.S. BELLAD
International Journal of Engineering Science and Technology , 2011,
Abstract: Magnetoelectric composites, namely, y[Li0.5Ni0.75-x/2Znx/2Fe2O4]+(1-y)Ba0.5Sr0.5TiO3 were prepared by standard double sintering ceramic method. The X-ray diffraction analysis was used to carry out the structural analysis to confirm the presence of constituent phases in the composites and to calculate the lattice parameters. The variation of dc resistivity with temperature shows a semiconducting behavior. From ac conductivity measurements in the range 100Hz to 1MHz it is concluded that in the present composites the conduction is due to small poloron hopping. The dielectric constant ( ) was studied as a function of frequency in the range 100Hz– 1MHz and as a function of temperature at four fixed frequencies (ie. 100Hz, 1 KHz, 10 KHz, 100 KHz). The saturation magnetization (Ms) was calculated from hysteresis loop. Flat curves in the magnetoelectric (ME) output Vs dc magnetic field is obtained, which may be due to the presence of Strontium in the composites. The static value of the ME conversion factor, i.e. (dE/dH)H was studied as a function of applied magnetic field. ME conversion factor showed direct relation with the resistivity of the composites.
Synthesis and Characterization of Polypyrrole (PPy) Thin Films  [PDF]
M. A. Chougule, S. G. Pawar, P. R. Godse, R. N. Mulik, Shashwati Sen, V. B. Patil
Soft Nanoscience Letters (SNL) , 2011, DOI: 10.4236/snl.2011.11002
Abstract: Polypyrrole (PPy) was synthesized by chemical oxidative polymerization technique using monomer pyrrole and ammo-nium persulphate as an oxidant in a ratio of 1:1. Thin films of polypyrrole were prepared by dissolving polypyrrole in mcresol and cast using spin coating technique on glass substrates. Thin films of polypyrrole were characterized by X ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infra red spectroscopy (FTIR), UV visible spectroscopy and electrical resistivity by four probe method. The XRD spectra showed that the polypyrrole is amorphous in nature. SEM studies revealed a uniform granular structure of PPy. The FTIR spectra shows that the presence of all characteristics absorption peaks of polypyrrole that is, 890 cm?1 (=C–H out-of-plane vibration), 1040 cm?1 (=C–H in-plane vibration), 1170 cm?1 (N–C stretch bending) and 1410 cm?1 (pyrrole ring vibration). UV visible study shows PPy films exhibit absorption peak at 446 nm (2.77 eV). Room temperature electrical resistivity of PPy is in the critical regime of the metal –to –insulator (M-I) transition.
Triglyceride-Increasing Alleles Associated with Protection against Type-2 Diabetes
Yann C. Klimentidis?,Akshay Chougule,Amit Arora?,Alexis C. Frazier-Wood?,Chiu-Hsieh Hsu
PLOS Genetics , 2015, DOI: 10.1371/journal.pgen.1005204
Abstract: Elevated plasma triglyceride (TG) levels are an established risk factor for type-2 diabetes (T2D). However, recent studies have hinted at the possibility that genetic risk for TG may paradoxically protect against T2D. In this study, we examined the association of genetic risk for TG with incident T2D, and the interaction of baseline TG with TG genetic risk on incident T2D in 13,247 European-Americans (EA) and 3,238 African-Americans (AA) from three prospective cohort studies. A TG genetic risk score (GRS) was calculated based on 31 validated single nucleotide polymorphisms (SNPs). We considered several baseline covariates, including body- mass index (BMI) and lipid traits. Among EA and AA, we find, as expected, that baseline levels of TG are strongly positively associated with incident T2D (p<2 x 10-10). However, the TG GRS is negatively associated with T2D (p=0.013), upon adjusting for only race, in the full dataset. Upon additionally adjusting for age, sex, BMI, high-density lipoprotein cholesterol and TG, the TG GRS is significantly and negatively associated with T2D incidence (p=7.0 x 10-8), with similar trends among both EA and AA. No single SNP appears to be driving this association. We also find a significant statistical interaction of the TG GRS with TG (pinteraction=3.3 x 10-4), whereby the association of TG with incident T2D is strongest among those with low genetic risk for TG. Further research is needed to understand the likely pleiotropic mechanisms underlying these findings, and to clarify the causal relationship between T2D and TG.
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