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Sahoo B.P.,Indian Institute of Technology Kharagpur | Naskar K.,Indian Institute of Technology Kharagpur | Dubey K.A.,Bhabha Atomic Research Center | Choudhary R.N.P.,Institute of Technical Education and Research | Tripathy D.K.,Kalinga Institute of Industrial Technology University
Journal of Materials Science | Year: 2013

Composites based on ethylene acrylic elastomer (AEM) filled with a special type of conductive carbon black (CCB) have been prepared by two-roll mixing mill. The compression-molded sheet of the prepared composites have been subjected to electron beam (EB) radiation dose up to 400 kGy to induce radiation crosslinked composites. The crosslinked density has been calculated according to Flory-Rehner equation and is found to increase with increasing EB dose and CCB loading. Chain scission-to-crosslink density has been calculated by Charlesby-Pinner equation, which shows decreasing trend with increasing radiation dose. The dielectric relaxation behaviors of different doses of EB-treated AEM/CCB composites have been extensively studied as a function of frequency of applied electric field (101-106 Hz), CCB loading [0-30 phr (parts per hundred)], temperature (25-120 C), and EB dose (50-400 kGy). It is observed that the dielectric permittivity (ε′) increases with CCB loading and temperature, but decreases with increasing EB dose. This can be explained on the basis of interfacial polarization. Based on dielectric loss tangent (tan δ) values, it is observed that the dielectric relaxation time decreases with increases in the filler loading and temperature. However, it increases with increase in the radiation doses. Both the real and imaginary parts of the impedance (Z′ and Z″) have been found to decrease with increase in conductive filler loading. The AC conductivity (σac) increases with increase in the CCB concentration, test temperature, and radiation doses, which is attributed to the more pronounced hopping and tunneling mechanism. The percolation threshold (φ crit) occurred in the range of 16 phr CCB loading. The dispersions of CCB phase in AEM matrix below and above percolation have been captured by the transmission electron microscope photomicrographs. © 2012 Springer Science+Business Media, LLC.

Panda K.C.,Sambalpur University | Swain D.K.,Kalinga Institute of Industrial Technology University
Annals of Library and Information Studies | Year: 2011

Attempts to make the user community aware of e-news and e-news services offered by different e-news channels all around the world. Provides a brief discussion of history and developments of e-news services, newspaper websites and latent advantages of e-news in the electronic era. Employs literature survey method to unfold the latest trends of e-news industry and finds that, though e-news services provide immense opportunity to the readers and simultaneous access at infinite points and reading at ones convenience, still a few key technical challenges like, navigational support, hyper linking, and designing of e-newspapers needs to be properly taken care of and tackled with. Concludes with the recommendation that information professionals should take steps to increase the usage of e-newspapers by their intended audience.

Bhoi S.K.,National Institute of Technology Rourkela | Nayak R.P.,National Institute of Technology Rourkela | Dash D.,National Institute of Technology Rourkela | Rout J.P.,Kalinga Institute of Industrial Technology University
International Conference on Communication and Signal Processing, ICCSP 2013 - Proceedings | Year: 2013

Vehicular Ad Hoc Network (VANET) is a challenging area of research in the field of vehicular technology. It is an emerging topic for its high mobility and high link disruption. But if link disruption is due to the malicious drivers in the network then it reduces the performance of the network. Hole Generation attack is a kind of attack in which the malicious drivers breaks the communication links between the vehicles by increasing or decreasing their own speeds when they are a part of the network. In this paper, we proposed a Robust Routing Protocol (RRP) to send the message securely from source to destination by surviving from the hole generation attack. RRP consists of a security module to recognize a genuine node and a recovery module to resist the hole created by the malicious drivers. RRP network model is mainly divided into three phases: first phase is the hole detection phase in which the hole is detected, in the second phase hole information is broadcasted in the whole network and in the third phase the data is transmitted from source to destination by selecting a secure optimal path. Simulation result shows RRP performs better than GPSR when security and recovery is considered. It has a high packet delivery ratio when malicious drivers are considered in the network. © 2013 IEEE.

Sahoo B.P.,Indian Institute of Technology Kharagpur | Naskar K.,Indian Institute of Technology Kharagpur | Tripathy D.K.,Kalinga Institute of Industrial Technology University
Journal of Elastomers and Plastics | Year: 2014

Conductive rubber composites based on ethylene acrylic elastomer (AEM) and conductive carbon black (CCB) were prepared by a two-roll mixing mill. From the transmission electron microscope photomicrographs, the uniform distribution of CCB aggregates and the interconnected CCB aggregates in the AEM matrix were observed. The bound rubber content of unvulcanized rubber was found to increase significantly with increasing CCB content. The effect of CCB concentration on the dynamic viscoelastic properties of AEM matrix was determined using a Rubber Process Analyzer (RPA 2000) in terms of strain sweep and frequency sweep of both uncured and cured AEM/CCB systems. The storage modulus (G) increased with an increase in CCB loading. In the case of strain sweep, the G values decreased with strain amplitude for both the systems, but the G was more for cross-linked AEM/CCB systems. The strain dependency of G for CCB-filled AEM systems can be explained on the basis of the Payne effect. The complex viscosity (η∗) of these systems increased with CCB loading, and it decreased with strain amplitude, which is due to the shear thinning effect. The tan δ for unvulcanized and vulcanized systems increased with the strain; however, the value of tan δ was <1 throughout the experimental strain range, which explains the elastic nature of the cured systems. The G increased with angular frequency for both the systems and the tan δ became independent upon the angular frequency after 10 Hz. The alternating current conductivity (σAC) increased with an increase in CCB loading at all frequencies and the system achieves the percolation at 20 phr CCB loading, which is in accordance with the rheological percolation. The direct current conductivity (σDC) also increased with an increase in CCB concentration. © The Author(s) 2013.

Maity B.,Kalinga Institute of Industrial Technology University
2016 International Conference on Computer Communication and Informatics, ICCCI 2016 | Year: 2016

Wireless communication systems, satellite communication and radar systems are generally used low pass microwave filter for frequency selection. The low pass microwave filters are essential for reject harmonic components which are above cut off frequency. High impedance and low impedance microstrip lines are used in stepped impedance microwave filter design. In this proposed filter describes the design of C-band microstrip line low pass filter. In this paper we have choose the bandwidth of 4GHz and implemented with FR4 substrate. Relative permittivity is 4.2 with a thickness of 62 mil for 6th order low pass filter. I have achieved the cut off frequency 4.010GHz for -3dB. The return loss is greater than -47 dB. The proposed low pass stepped impedance microwave filter describes the designing of Butterworth approximation and cut off frequency at 4GHz with an realization of microstrip line. This low pass filter design is simulated by Advanced Design System (ADS) software. © 2016 IEEE.

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