Bari Sadri, India
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Kalia S.,BAHRA University | Sheoran R.,Singhania University
International Journal of Polymer Analysis and Characterization | Year: 2011

It becomes necessary to change the surface morphology of natural fibers to improve the interfacial adhesion between matrix and fibers. To improve the compatibility between natural fibers and hydrophobic polymer matrices, various greener methods have been explored such as plasma treatment and treatments using fungi, enzymes, and bacteria. In the present article, we report the microwave-assisted grafting of methyl methacrylate onto ramie fibers (Boehmeria nivea) and cellulase enzyme-assisted biopolishing of ramie fibers using the bacteria Streptomyces albaduncus. The effects of these treatments on the properties of ramie fibers are discussed. The modified fibers were characterized by using FT-IR, SEM, XRD, and TGA/DTA techniques in order to determine their morphology, crystallinity, and thermal stability. This article also describes the comparative study of properties of biologically and chemically modified ramie fibers. © Taylor & Francis Group, LLC.


Vaidyanathan S.,Tamil University | Rajagopal K.,Singhania University
International Journal of Systems Signal Control and Engineering Application | Year: 2011

This study investigates the hybrid synchronization of identical hyperchaotic Wang-Chen systems, identical hyperchaotic Lorenz systems and non-identical hyperchaotic Wang-Chen and Lorenz systems. The hyperchaotic Wang-Chen system and hyperchaotic Lorenz system are important models of hyperchaotic systems. Hybrid synchronization of the hyperchaotic systems addressed in this study is achieved through the synchronization of the 1st and 3rd states of the master and slave systems and anti-synchronization of the 2nd and 4th states of the master and slave systems. Active nonlinear control is the method used for the hybrid synchronization of hyperchaotic Wang-Chen and Lorenz systems and the stability results are established using Lyapunov stability theory. Since, the Lyapunov exponents are not required for these calculations, the proposed method is quite effective and convenient to achieve hybrid synchronization of the hyperchaotic systems addressed in this study. Numerical simulations are provided to illustrate the effectiveness of the various synchronization schemes proposed in this study.


Kalia S.,Singhania University
Journal of Low Temperature Physics | Year: 2010

Cryogenics is an exciting, important and inexpensive technique that already has led to main discoveries and holds much future assurance. Cryogenic processing is the treatment of the materials at very low temperature around 77 K. This technique has been proven to be efficient in improving the physical and mechanical properties of the materials such as metals, alloys, plastics and composites. It improves the wear, abrasion, erosion and corrosion resistivity, durability and stabilizes the strength characteristics of various materials. Cryogenic refines and stabilizes the crystal lattice structure and distribute carbon particles throughout the material resulting a stronger and hence more durable material. In present paper, we have reviewed the effect of cryogenic treatment on some metals, alloys, plastics and composites. © 2009 Springer Science+Business Media, LLC.


Murti K.,Singhania University | Kumar U.,JKK Nataraja Dental College and Hospital
Asian Pacific Journal of Tropical Biomedicine | Year: 2012

Objective: To establish the wound healing activity of aqueous and ethanolic extract of roots ofFicus racemosa (F. racemosa). Methods: Two models were performed to evaluate the wound healing activity i.e. incision and excision models. In incision model the parameter whichwas carried out was breaking strength of wounded skin. In excision model percentage woundcontraction and period of epithelialization were established for both the extracts. Reference standard drug was povidone iodine ointment for comparison with other groups. Results: From the observation in both two models, aqueous extract of F. racemosa was found to have greaterwound healing activity in terms of breaking strength in incision model and percentage woundcontraction, period of epithelialization in excision model than that of other groups. Conclusions: In conclusion, our findings suggest that aqueous extract of F. racemosa possesses better wound healing ability than the ethanolic extract.


Sundarapandian V.,Vel Tech Dr.RR & Dr.SR Technical University | Karthikeyan R.,Singhania University
Journal of Engineering and Applied Sciences | Year: 2012

In this study, researchers apply adaptive control method to derive new results for the anti-synchronization of identical Tigan Systems (2008), identical Li Systems (2009) and non-identical Tigan and Li Systems. In adaptive anti-synchronization of identical chaotic systems, the parameters of the master and slave systems are unknown and researchers devise feedback control law using the estimates of the system parameters. In adaptive anti-synchronization of non-identical chaotic systems, the parameters of the master system are known but the parameters of the slave system are unknown and researchers devise feedback control law using the estimates of the parameters of the slave system. The adaptive synchronization results derived in this study for the uncertain Tigan and Li Systems are established using Lyapunov Stability Theory. Since, the Lyapunov exponents are not required for these calculations, the adaptive control method is very effective and convenient to achieve anti-synchronization of identical and non-identical Tigan and Li Systems. Numerical simulations are shown to demonstrate the effectiveness of the adaptive anti-synchronization schemes for the uncertain chaotic systems addressed in this study. © Medwell Journals, 2012.


Sundarapandian V.,Vel Tech Dr.RR & Dr.SR Technical University | Karthikeyan R.,Singhania University
Journal of Engineering and Applied Sciences | Year: 2012

This study investigates the hybrid synchronization of Hyperchaotic Lorenz and Chen Systems via adaptive control. Explicitly, researchers derive new results for the hybrid chaos synchronization of identical Hyperchaotic Lorenz Systems, identical Hyperchaotic Chen Systems and non-identical Hyperchaotic Lorenz and Chen Systems. In this study, Researchers assume that the parameters of both master and slave systems are unknown and we devise adaptive hybrid synchronization schemes using the estimates of parameters for both Master and Slave Systems. The adaptive hybrid synchronization results derived in this study are established using Lyapunov Stability Theory. Since, the Lyapunov exponents are not required for these calculations, the proposed Adaptive Control Method is very effective and convenient to achieve hybrid synchronization of identical and non-identical Hyperchaotic Lorenz and Chen Systems. Numerical simulations are shown to demonstrate the effectiveness of the proposed adaptive hybrid synchronization schemes for the hyperchaotic systems addressed in this study. © Medwell Journals, 2012.


Vaidyanathan S.,Vel Tech Dr.RR & Dr.SR Technical University | Rajagopal K.,Singhania University
Communications in Computer and Information Science | Year: 2011

This paper investigates the global chaos synchronization of identical hyperchaotic Pang systems (Pang and Liu, 2011) and synchronization of non-identical hyperchaotic Pang system and Wang system (Wang and Liu, 2006). Active nonlinear feedback control is the method used to achieve the synchronization of the identical and different hyperchaotic Pang and Wang systems addressed in this paper and our results are established using Lyapunov stability theory. Since the Lyapunov exponents are not required for these calculations, the active control method is effective and convenient to synchronize identical and different hyperchaotic Pang and Wang systems. Numerical simulations are given to illustrate the effectiveness of the proposed synchronization schemes for the global chaos synchronization of hyperchaotic systems addressed in this paper. © 2011 Springer-Verlag Berlin Heidelberg.


Vaidyanathan S.,Vel Tech Dr.RR & Dr.SR Technical University | Sampath S.,Singhania University
Communications in Computer and Information Science | Year: 2011

In this paper, new results based on the sliding mode control are derived for the global chaos synchronization of identical hyperchaotic Lorenz systems (Jia, 2007). The stability results for the sliding mode control based synchronization schemes derived in this paper are established using Lyapunov stability theory. Since the Lyapunov exponents are not required for these calculations, the sliding mode control method is very effective and convenient to achieve global chaos synchronization of the identical hyperchaotic Lorenz systems. Numerical simulations are shown to illustrate and validate the sliding mode control results derived in this paper for the identical hyperchaotic Lorenz systems. © 2011 Springer-Verlag.


Vaidyanathan S.,Vel Tech Dr.RR & Dr.SR Technical University | Rajagopal K.,Singhania University
Communications in Computer and Information Science | Year: 2011

This paper investigates the adaptive synchronization of identical Pan systems (2010) and synchronization of non-identical Lü system (2002) and Pan system (2010). In adaptive synchronization of identical chaotic systems, the parameters of the master and slave systems are unknown and we devise feedback control laws using estimates of the system parameters. In adaptive synchronization of different chaotic systems, the parameters of the master system are known, but the parameters of the slave system are unknown and we devise feedback control laws using the estimates of the parameters of the slave system. Our adaptive synchronization results derived in this paper are established using Lyapunov stability theory. Since the Lyapunov exponents are not required for these calculations, the adaptive control method is effective and convenient to synchronize identical and different Lü and Pan systems. Numerical simulations are given to illustrate the effectiveness of the proposed adaptive synchronization schemes for the global chaos synchronization of chaotic systems addressed in this paper. © 2011 Springer-Verlag.


Vaidyanathan S.,Vel Tech Dr.RR & Dr.SR Technical University | Rajagopal K.,Singhania University
Communications in Computer and Information Science | Year: 2011

The purpose of this paper is to study chaos anti-synchronization of identical Li chaotic systems (2009), identical T chaotic systems (2008) and non-identical Li and T chaotic systems. In this paper, sufficient conditions for achieving anti-synchronization of the identical and non-identical Li and T systems are derived using active nonlinear control and our stability results are established using Lyapunov stability theory. Since the Lyapunov exponents are not required for these calculations, the active nonlinear feedback control method is effective and convenient to anti-synchronize the identical and non-identical Li and T chaotic systems. Numerical simulations are also given to illustrate and validate the anti-synchronization results for the chaotic systems addressed in this paper. © 2011 Springer-Verlag.

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