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Kalpana J.,SSCE | Rao P.S.,Centurion University | Rao P.G.,GMRIT
Engineering Solid Mechanics | Year: 2017

This paper presents the effect of vibratory dissimilar TIG (Tungsten Inert Gas) welding process on hardness of welded joins with respect to change of vibratory parameters. In this study, new vibratory setup with two metal engravers is used to give mechanical vibrations to the specimens to be welded. Finally, the effect of mechanical vibrations with the variation of vibration parameters is studied on the hardness at the weld bead and heat effected zone (HAZ) of welded joints. © 2017 Growing Science Ltd. All rights reserved.


Rao P.G.,GMRIT | Rao P.S.,Centurion University | Gopala Krishna A.,Jawaharlal Nehru Technological University Kakinada
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering | Year: 2017

Previous researches have been devoted to development of vibratory setup for inducing mechanical vibrations into the weld pool during welding process. The designed vibratory setup produces the required frequency with suitable amplitude and acceleration in terms of voltages. This helps in producing uniform and fine grain structure in the welded joints which results in an improvement in the mechanical properties of the weld pieces at heat affected zone. This paper presents the development of a smart prediction tool by implementing generalized regression neural network to establish a relation between vibration parameters such as input voltage to the vibromotor, time of vibration and impact strength of vibratory weld joints. In order to validate the feasibility of the developed prediction tool, a comparison is made with the experimental results. © IMechE 2015.


Centurion University's tie up with ICA gives students guaranteed job opportunity and on-job training after successful completion of their courses.


Sahoo P.K.,Centurion University | Parvathi K.,KIIT University
2014 International Conference on High Performance Computing and Applications, ICHPCA 2014 | Year: 2015

Efficiency of any surveillance system depends on the efficacy of moving object detection. Background subtraction, temporal differencing and optical flow techniques are mostly used in the moving object detection techniques. In this paper a hybrid technique is proposed based on background subtraction and temporal differencing techniques to detect the moving objects in outdoor and indoor scenes. The efficacy of algorithm is validated using different test videos and comparing with background subtraction and temporal differencing methods. © 2014 IEEE.


Govinda Rao P.,GMRIT | Srinivasa Rao P.,Centurion University | Gopala Krishna A.,Jawaharlal Nehru Technological University Kakinada
Journal of Manufacturing Technology Research | Year: 2015

In this review paper the residual stresses in welded structures produced by vibratory welding process has been discussed. Material properties, material manufacture, and structural geometry, welding process, treatments after welding and service conditions have been considered to analyse residual stress distributions. Plate butt welds, circumferential butt welds and weld cladding are the best examples to analyse residual stress distributions. Entire manufacturing and service history of the vibratory welded structure and its component materials are required for better understanding and analyzing the improvement in prediction and reduction of residual stresses. Microstructure of can be refined when the welded joints prepared with the presence of vibration. In this study, mechanical vibrations were given to the weld specimens during welding for identifying its effect on the hardness, metallurgical structure and residual stress of the material. Residual stresses were found to diminish in response to vibration whether it was applied during welding or after welding. Also grain growth process in the weld was increased. © Nova Science Publishers, Inc.


Shoba C.,Gandhi Institute of Technology and Management | Ramanaiah N.,Andhra University | Rao D.N.,Centurion University
Journal of Materials Research and Technology | Year: 2015

The present study aims at finding the residual stresses on aluminum hybrid composites during turning operation. The composites with varying percentage by weight reinforcement of 2, 4, 6 and 8 RHA and SiC in equal proportions were fabricated using two stage stir casting process. X-ray diffraction was used to study the residual stresses on the surface layer of the machined surface. It was observed that the residual stresses generated during casting were considerably larger when compared to the stresses generated during machining of composites. It was also noticed that the residual stresses were found to decrease with the increase in the reinforcement and increases with the increase in cutting speed. The related mechanisms are explained and presented in this work. © 2015 Brazilian Metallurgical, Materials and Mining Association.


Rao K.D.,Centurion University | Kumar S.,Jadavpur University
Advances in Intelligent Systems and Computing | Year: 2014

In this paper design of the Linear Quadratic Regulator (LQR) for Quarter car semi active suspension system has been done. Current automobile suspension systems use passive components only by utilizing spring and damping coefficient with fixed rates. The vehicle suspension systems are typically rated by its ability to provide good road handling and improve passenger comfort. In order to improve comfort and ride quality of a vehicle, four parameters are needed to be acknowledged. Those four parameters are sprung mass acceleration, sprung mass displacement, unsprung displacement and suspension deflection. This paper uses a new approach in designing the suspension system which is semi-active suspension. Here, the hydraulic damper is replaced by a magneto-rheological damper and a controller is developed for controlling the damping force of the suspension system. The semi-active suspension with controller reduces the sprung mass acceleration and displacement hence improving the passengers comfort. © Springer International Publishing Switzerland 2015.


Nayak T.,Centurion University | Prasad S.,GMR Institute of Technology | Senapati M.R.,Centurion University
Research Journal of Applied Sciences, Engineering and Technology | Year: 2015

In this study we have analyzed different techniques for information retrieval in text mining. The aim of the study is to identify web text information retrieval. Text mining almost alike to analytics, which is a process of deriving high quality information from text. High quality information is typically derived in the course of the devising of patterns and trends through means such as statistical pattern learning. Typical text mining tasks include text categorization, text clustering, concept/entity extraction, creation of coarse taxonomies, sentiment analysis, document summarization and entity relation modeling. It is used to mine hidden information from not-structured or semi-structured data. This feature is necessary because a large amount of the Web information is semi-structured due to the nested structure of HTML code, is linked and is redundant. Web content categorization with a content database is the most important tool to the efficient use of search engines. A customer requesting information on a particular subject or item would otherwise have to search through hundred of results to find the most relevant information to his query. Hundreds of results through use of mining text are reduced by this step. This eliminates the aggravation and improves the navigation of information on the Web. © Maxwell Scientific Organization, 2015.


Gaya A.,Centurion University
IET Conference Publications | Year: 2011

A channel model under has been designed for fading environments using which channel capacity of a MIMO system can be enhanced. The channel which proposed here between transmitter and receiver is Rayleigh flat fading and both the transmitter and receiver are unknown about the fading coefficient. As an efficient antenna arrayis being used here at the receiver which will increase the SNR and will give the high value of channel capacity. A linear antenna array gives high value of SNR and beam width which can be considered at the receiver. Under Rayleigh fading channel capacity varies linearly with number of antenna elements.


Behera G.,Centurion University
Proceedings - 2011 2nd National Conference on Emerging Trends and Applications in Computer Science, NCETACS-2011 | Year: 2011

Now-a-days privacy has become a major concern; the goals of security like confidentiality, integrity and availability do not ensure privacy. Data mining is a threat to privacy. Researchers today focus on how to ensure privacy while performing data mining task. As Data mining algorithms are typically complex and furthermore the input usually consists of massive data sets, the generic protocols in such a case are of no practical use and therefore more efficient protocols are required. This paper focus on the problem of decision tree learning with the popular C4.5 algorithm. C4.5, an extension of ID3 is a very popular decision tree building method in data mining. Entropy and Gini index are two different criteria used in ID3. While there is quite little work in privacy preserving ID3 using entropy and not much has been done for Gini index. This paper propose modified protocols based on secure multiparty computation for privacy preserving C4.5 using Gini index over distributed partitioned data, where the protocols do not require any third party server. However, some communication overhead is necessary so that the parties can carry out the secure protocols. The result like ROC(Receiver Operating characteristic) graph and detail accuracy through cost counting index is shown. © 2011 IEEE.

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