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Tribhuwan M.R.,MIT E | Bhuyar V.A.,MIT E | Pirzade S.,Fr C Rodrigues Institute Of Technology
Proceedings - 2nd International Conference on Advances in Recent Technologies in Communication and Computing, ARTCom 2010 | Year: 2010

Cloud computing technology is enabling IT to do more with the infrastructure that already exists, as well as adding new ways to expand capacity quickly and economically by using external cloud computing resources. This technology is enabling IT managers to treat infrastructure as a common substrate on which they can provide services to users faster, in a much more flexible way and in cost-effective way-without having to re-design or add to the underlying infrastructure. Given the benefits of cloud computing, its broad appeal is not surprising. However, this new approach does raise some concerns. Chief among them is securing stored data in the cloud. In this paper, we focus on cloud data storage security, which has always been an important aspect of quality of service. To ensure the correctness of users' data in the cloud, we propose a method by utilizing the homomorphic token with distributed verification of erasure-coded data. Our scheme achieves the integration of storage correctness insurance and data error localization, i.e., the identification of misbehaving server(s). © 2010 IEEE. Source


Choudhari P.,Fr C Rodrigues Institute Of Technology
Proceedings - 2012 International Conference on Communication, Information and Computing Technology, ICCICT 2012 | Year: 2012

Wireless sensor network is an emerging technology that enables remote monitoring of objects and environment. Wireless sensor networks can assist user to detect target as well as acquire the movement information of the target such as a vehicle. Vehicle tracking finds its prime application in intrusion avoidance, surveillance etc. For surveillance applications, it is preferable to keep the intruder unaware of being tracked. This paper presents a tracking algorithm based on Kalman filter and the hardware implementation of a test bed along with the set/reset calibration circuit for improving the sensitivity of the magnetic sensor. The proposed method has been evaluated on real data. © 2012 IEEE. Source


Khot S.M.,Fr C Rodrigues Institute Of Technology | Yelve N.P.,Fr C Rodrigues Institute Of Technology
JVC/Journal of Vibration and Control | Year: 2011

In the last decade, many advances and changes have been seen in engineering theory and applications. The modern trend is to combine modeling, theoretical analysis and computer simulation. The conventional techniques of mathematical modeling of real life complicated structural systems for vibration analysis are tedious and time consuming. The finite element (FE) method is becoming popular because of its simplicity and feasibility of using for real life applications. In the present study, extraction of the system model from its FE model by using commercially available softwares such as ANSYS© and MATLAB© is demonstrated. A two-degree-of-freedom spring-mass-damper system is considered here. Its state space mathematical model in principal coordinate system is obtained in MATLAB© from the modal analysis results of its FE model done in ANSYS©. For checking the validity of model, transfer function and state space model in physical coordinates of the same system are derived mathematically by assuming proportional damping. Frequency responses of all the system models are compared and found to be in good agreement. To demonstrate the application of this study, system model of a cantilever beam is also extracted in MATLAB© from the result of modal analysis of its FE model in ANSYS© and its frequency response is plotted. Response of cantilever beam to unit impulse input is also obtained in both ANSYS© and MATLAB© and compared for validating the model. This study will definitely help in simplifying the vibration analysis of real life systems. © The Author(s) 2010. Source


Patil A.S.,Fr C Rodrigues Institute Of Technology | Shah M.S.,Fr C Rodrigues Institute Of Technology
2015 International Conference on Nascent Technologies in the Engineering Field, ICNTE 2015 - Proceedings | Year: 2015

Vocal tract is one of most important system in speech production and it begins at the glottis and ends at the lips. Vocal tract shape (VTS) is defined as varying cross sectional area from glottis-to-lips. Based on literature review it is noted that most of the research work carried out on vocal tract shape estimation (VTSE) is based on Wakita's algorithm which is based on autocorrelation of speech. The objective of this research work is to investigate VTSE based on formant frequencies, autocorrelation, covariance and lattice methods. For validation of results, data available for vocal tract shape for vowels from Magnetic Resonance Imaging (MRI) technique was used. Vowels /a/, /i/, /u/, /o/, vowel-semivowel-vowel utterances /aya/, /awa/ and some VCV syllables /apa/, /uba/ were analyzed for three female and three male speakers. From formant frequency, autocorrelation, covariance and lattice methods satisfactory results were obtained for vowels and semivowels. However, VTS for vowels based on formant frequency technique when compared with the MRI shapes were more realistic. From the investigation for effect of variation in analysis frame length on VTSE, it was observed that, lattice method required minimum analysis frame length compared to autocorrelation, and covariance methods, and estimated areas were more consistent across the analysis frames compared to other methods. © 2015 IEEE. Source


Khot S.M.,Fr C Rodrigues Institute Of Technology | Gurav S.,Fr C Rodrigues Institute Of Technology
2015 International Conference on Nascent Technologies in the Engineering Field, ICNTE 2015 - Proceedings | Year: 2015

The rolling element bearing is an important element used in rotating machinery. The performance of any mechanical system depends on condition of the bearing. Hence, to avoid failures condition monitoring of rolling element bearings is essential. In the present study, effect of surface failure on inner and outer race of bearing on vibration spectrum is proposed. The vibration spectrum is acquired for healthy bearing and bearing with surface failure failures on outer and inner race of bearing. The experimental study is carried out with various defect sizes on inner and outer race of bearing surface, at various shaft excitation frequencies. Vibration spectrums are acquired using a tri-axial shear type accelerometer (Type AC 102-A, SI.NO.66760) along with the photon+ (Bruel and Kajer) ultraportable dynamic signal analyser. The experimental results are compared with ball pass frequency of inner and outer race. It has been found that the percentage of errors is within permissible limit. © 2015 IEEE. Source

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