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MATLAB SIMULATION OF CHAOTIC SYSTEM AND ITS APPLICATION IN SECURE COMMUNICATION WITH AWGN CHANNEL
PAWAN, SANJU SAINI
International Journal of Electrical, Electronics and Data Communication , 2013,
Abstract: Chaos is a complex behavior produced by internal random properties of nonlinear, deterministic dynamical systems. Recently, chaos based techniques have received a great deal of attention for the purpose of secure communication. This paper investigates, the performance of a secure communication system using cascaded-drive response synchronization in a noisy channel. Simulation results show that this method can be successfullyused to recover the encrypted signal up to signal to noise ratio of 35 dB.
Application of high performance liquid chromatography to the determination and validation of levodopa in methanolic extract of Mucuna utilis
Singh Raman,Saini Pawan,Mathur Satish,Singh Gyanendra
International Journal of Green Pharmacy , 2010,
Abstract: A sensitive, precise and accurate high-performance liquid chromatographic (HPLC) method has been developed for the analysis of levodopa in methanolic extract of Mucuna utilis. The method utilises sample preparation step followed by separation on a Eurosphere C18, 250 Χ 4.0 mm, 5 m particle size column, using methanol and 0.5% v/v acetic acid in the ratio of 70:30 v/v as the mobile phase. Analysis of levodopa was carried out in the absorbance mode at 284 nm. The method was validated in terms of linearity, precision (inter and intra day), accuracy, Limit of Detection (LOD) and Limit of Quantitation (LOQ). The proposed HPLC method was found to be precise, specific, accurate and can be used for the identification and quantitative determination of levodopa in herbal extracts.
Insights on the structural characteristics of NDM-1: The journey so far  [PDF]
Avneet Saini, Rohit Bansal
Advances in Biological Chemistry (ABC) , 2012, DOI: 10.4236/abc.2012.24040
Abstract: New Delhi metallo-β-lactamase (NDM-1) has created a medical storm ever since it was first reported; as it is active on virtually all clinically used β-lactam antibiotics. NDM-1 rampancy worldwide is now considered a nightmare scenario, particularly due to its rapid dissemination. An underlying theme in the majority of recent studies is structural characterization as knowledge of the three-dimensional structure of NDM-1 shall help find connections between its structure and function. Moreover, structural details are even critical in order to reveal the resistance mecha- nism to β-lactam antibiotics. In this perspective, we review structural characteristics of NDM-1 that have been delineated since its first report. We anticipate that these structure-function connections made by its characterization shall further serve as future guidelines for elucidating pathways towards de novo design of functional inhibitors.
Mobile Based Electricity Bill Deposit System through UML  [PDF]
Pawan Kumar Chaurasia, Vipin Saxena
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.43021
Abstract: The present paper deals with a model design through Unified Modeling Language (UML) for a mobile based elec-tricity bill deposit system. Due to complex life style of people this model is proposed in the form of UML Class, Sequence and Use Case diagrams. For implementation of proposed model, a real case study of Uttar Pradesh Electricity Bill deposit System is considered. By the use of this model, one can display the status of deposited electricity bill on a hand held mobile device system.
On the Performance of ISFET-based Device for Water Quality Monitoring  [PDF]
Pawan Whig, Syed Naseem Ahmad
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.411087
Abstract: A new configuration realizing water quality monitoring device using ISFET involving low power CMOS Integrated “Ion Sensitive Field Effect transistor (ISFET) – Operational Amplifier is presented. The study’s main focus is on simulation of power and performance analysis of ISFET device, which is used for water quality monitoring. This approach can improve calibration of device to a fairly wide range without the use of a high speed digital processor. The conventional device has a drawback of slow slew rate but in this novel design, the device has a better slew rate. A new slew rate enhancement (SRE) incorporated into a ISFET, which does not affect the small signal frequency response. The functionality of the circuit is tested using Tanner simulator version 15 for a 70nm CMOS process model also the transfer function realization is done on MATLAB R2011a version, the Very high speed integrated circuit Hardware description language(VHDL) code for the same scheme is simulated on Xilinx ISE 10.1 and various simulation results are obtained. Simulation results are included to demonstrate the results.
Purification and Characterization of Thermostable Cellulase Free Xylanase from Pseudomonas Sp. XPB-6  [PDF]
Pawan Kumar Sharma, Duni Chand
Advances in Microbiology (AiM) , 2012, DOI: 10.4236/aim.2012.21003
Abstract: Extracellular cellulase free xylanase from Pseudomonas sp. XPB-6 was purified to homogeneity with 2.15 fold of purity and 60.31% yield, respectively by ammonium sulfate precipitation and DEAE ion exchange chromatography. The protein was found to be a homotrimer consisting of three subunits of 41 kDa each and the native molecular weight of 123 kDa. The pH and temperature optimum for enzyme were 7.5 in 100 mM sodium phosphate buffer at 60°C and was stable to a high and broader range of pH and to a temperature up to 75°C. Kinetic experiments at 60°C gave Vmax and Km values of 144.92 U/mg and 0.60 mg·ml-1 respectively for birch wood xylan. The enzyme had no apparent requirement for cofactors, and its activity was strongly inhibited 1 mM Hg2+ and Cu2+ while it was slightly inactivated by 1 mM Mg2+ and Pb2+. Shelf life of xylanase of Pseudomonas sp. XPB-6 was studied both at room temperature and 4°C. The enzyme was stable both at room temperature and at 4°C for 90 and 28 days respectively. The half-life of the enzyme was approximately 40 days at room temperature.
Significance of the Ratio of Exhaust Temperature to Coolant Temperature and Its Effect on Various Engine Working Parameters
Pawan Kumar
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
Absence of the palmaris longus tendon in Indian population
Agarwal Pawan
Indian Journal of Orthopaedics , 2010,
Abstract: Background: Ethnic variations in the prevalence of the absence of the palmaris longus (PL) tendon are well known. Studies have also attempted to correlate its absence with other anatomical anomalies. However, most studies have been done in Caucasian populations. The present study was undertaken to know the occurrence of absence of palmaris longus in Indian population. Materials and Methods: The presence of the PL tendon was clinically determined in 385 normal Indian men and women using the standard technique. In subjects with an absent PL tendon, three other tests were performed to confirm its absence. All subjects were also examined for the presence of the flexor digitorum superficialis (FDS) in the little finger. Results: The overall unilateral absence of the tendon was 16.9% and the bilateral absence was in 3.3% in our population. There was no significant difference in its absence with regard to the body side or sex. The overall prevalence of the weak FDS in the little finger irrespective of the presence or absence of the PL tendon in our study was 16.10%. If we compare the deficiency of the FDS in the little finger with the absence of the PL tendon, the overall incidence is 4.15% and is statistically significant, while the sexwise distribution of the weak FDS with absent PL tendon was statistically significant in males and in females it was statistically insignificant. Conclusions: The prevalence of the unilateral absence of the PL tendon in an Indian population is comparable to the western population but a bilateral absence is significantly less. In patients with an absent PL tendon, the FDS of the little finger is weak, especially in males.
Congenital upper auricular detachment: Report of two unusual cases
Agarwal Pawan
Indian Journal of Plastic Surgery , 2009,
Abstract: Two unusual cases of congenital bilateral ear deformity have been presented. The deformity is characterized by upper auricular detachment on the right side with anotia on the left side in the first case and upper auricular detachment on the left side with normal ear on the right side in the second case. An attempt has been made to correlate the presented deformity with the embryological - foetal development of the auricle. Satisfactory correction can be obtained by repositioning the auricle back in to its normal position.
Congenital anterior urethrocutaneous fistula revisited
Agarwal Pawan
Indian Journal of Plastic Surgery , 2004,
Abstract: Congenital anterior urethrocutaneous fistulas are rare. A case of this unusual anomaly is presented with review of literature, discussion of the possible etiology and management strategy.
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