Mamatha C.,Sri Venkateswara University |
Krishnaiah M.,Sri Venkateswara University |
Prakash C.S.,SJCIT |
Rewatkar K.G.,Dr Ambedkar College |
International Journal of ChemTech Research | Year: 2014
M-type calcium Hexaferrites with substitution of trivalent Aluminum ions were prepared by Solution combustion technique using metal nitrates as oxidants and ODH as reducing agents. The powders were characterized with XRD, SEM, and EDS. XRD analysis indicated the formation of single-phase substituted Mtype calcium hexaferrites with space group of P63/mmc(194). The average crystallite size is calculated and found to be in Nano size. DC conductivity and AC conductivity of bulk samples have been investigated as a function of frequency and temperature. The measurements were carried out in the frequency range of 100 to 10 × 105 Hz,at room temperature. Activation energies were calculated at both ferrimagnetic and paramagnetic regions. The enhanced resistivity of aluminum doped calcium hexaferrite is a prospective application in microwave devices. Magnetic properties are studied with the help of vibrating sample magnetometer (VSM). Results of VSM studies show the decrease in saturation magnetization with the increase of Al concentration. Increase in coercivity and Retentivity illustrated that these are hard ferrite materials.
Journal of Theoretical and Applied Information Technology | Year: 2016
The fourth generation 4 and beyond networks define the future of mobile communication. Handover management in 4 networks based on the IPv6 core is a problem that exists. The co-channel interference in wireless channels effect network and handover performance. In this paper the proposed Noise Resilient Reduced Registration Time Care-of Mobile IP protocol is modelled considering practical network conditions. A threshold based handover decision making algorithm is incorporated in the proposed protocol. The results presented in this paper clearly put forth the effects of the co-channel interference on handover management and network performance in the presence of multiple users. The comparative study prove that the proposed protocol is robust and minimizes network performance degradation considering practical conditions. © 2005 - 2015 JATIT & LLS. All rights reserved.
Geetha C.R.,Jain University |
2nd International Conference on Electronics and Communication Systems, ICECS 2015 | Year: 2015
Cryptography is a technique for secret communication where as obscuring the secret communication using for different data is Steganography. The secret communication is carried through many sources like image, audio & video files. Our work is mainly proposing data hiding by embedding the message of interest using geometric style of cryptographic algorithm, thus providing high security. Wavelet and curvelet transform algorithms are used to perform preprocessing of images. Even if the image carrying embedded data i.e., Stego image undergoes a reverse operation and data cannot be extracted if the receiver is unaware of the exact coordinates of the geometric shape. Hence retrieving secret image for an attacker becomes a hard task. Our Experimental results are verified for both the properties of Cryptography and Steganography it may be applicable for kind of multimedia applications. © 2015 IEEE.
Venkatesh A.S.V.,PESIT |
Apoorva B.M.R.,PESIT |
Concrete Solutions - Proceedings of Concrete Solutions, 5th International Conference on Concrete Repair | Year: 2014
Many existing Reinforced Concrete (RC) buildings need retrofit to overcome deficiencies to resist seismic loads. The use of steel bracing systems for strengthening or retrofitting seismically inadequate reinforced concrete frames is a viable solution for enhancing earthquake resistance. The present study is concerned with the structural response of a 4 × 4 bays, 15 storeys RC building on incorporating steel bracings externally or internally and masonry infill as diagonal strut at the center of the middle frame of the building up to 10 stories as Lateral Load Resisting System (LLRS). The models analyzed consist of one basic moment resisting RC frame (bare frame) with square column of size 900 × 900mm and others include the same bare frame, but provided with External Steel Bracing at the centre of the middle frame of the building, Internal steel bracing at the centre of the building and masonry infill at the centre frame of the building as LLRS. The detail investigations are carried out in zone V of seismic zones of India, considering primary loads (dead, live and seismic loads) and their combinations. The results obtained from the linear static analysis are thoroughly investigated for maximum values of joint displacements, support reactions, beam forces and truss forces. The results indicate better resistance to lateral loads in the presence of masonry infill provided at centre frame of the building up to 10 stories. © 2014 Taylor & Francis Group.
Sudir P.,SJCIT |
Advances in Intelligent Systems and Computing | Year: 2014
Proposed approach explores a new framework for Curved video text detection and extraction by utilizing fast texture descriptor LU-transform and Maximal H-Transform for the text detection. Connected Component filtering method and Nearest Neighborhood (NN) constraint is utilized for false positive elimination. B-Spline curve is fitted to centroid of each character and each oriented character is vertically aligned by finding angle that aligns the normal vector to the vertical axis. The aligned text string is fed to OCR for recognition. Experiments on various curved video data and Hua’s horizontal video text dataset shows that proposed method is efficacious and robust in detecting and recognizing multioriented videotext. © Springer International Publishing Switzerland 2015.