Informatics Publishing Limited

K. Malarvizhi ¹, L. S. Jayashree ²

Affiliations
1 Karpagam College of Engineering, Coimbatore, IN
2 RVS College of Engineering and Technology, Coimbatore, IN

Abstract

The wireless networks provides Best Effort of Service. Traffic analysis is processed as quickly as possible, but there is no guarantee of timelines or actual delivery due to delay. The medium access layer (MAC) is needed to schedule the links carefully so that packets can be transmitted with minimal collisions. Many scheduling policies have been studied at the MAC layer with the objective of maximizing throughput and reducing delay. These schemes are often called throughput optimal scheduling schemes. We will analyze the delay performance in multi-hop wireless networks. In the MAC layer the delay estimation is at the lower and upper bounds of the queue using queuing analysis. This paper focuses only a comparison of queuing delay analysis in wireless networks using various well known queuing techniques and also extend to identify the low complexity distributed scheduling algorithm for multi-hop wireless networks.

Keywords

Low Complexity and Distributed Algorithms, Queuing Analysis, Multi-Hop Wireless Networks, Lower and Upper Bounds, Maximal Matching, Queuing Delay.

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L. Praveen ¹, G. Prakash ², K. Malarvizhi ³, S. Kathikeyan ⁴, B. Venkatraman ⁵

Affiliations
1 Production Department, Thiagarajar College of Engineering, IN
2 St Joseph College of Engineering, IN
3 Vel Tech University, IN
4 Mechanical Department, Tyagarajar College of Engineering, IN
5 IGCAR, Kalpakkam, IN

Abstract

Compared with other materials like metals. The non destructive testing of composites is still a relatively immature area. Composite material which are strong and can with stand very high loads but even a small flaw in such parts will lead to catroscopic failure. Defects as voids, dislocation can be detected by thermography technique. The two advanced types of thermography as Lock-in Thermography and Pulsed eddy current stimulated Thermography as to be applied on composites. Where the comparison and experimental result is analyzed based on the inspection of composite materials. Results shows the many calibrated values for different samples of glass fibers which will be help full for inspection for different thickness of composite materials. This paper shows the potential usefulness of the thermal methods.

Keywords

Composite, Lock-In Thermography, Pulsed Thermography, Glass Fibers.

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P. Maithili ¹, C. Udhaya Shankar ², K. Malarvizhi ², Rani Thottungal ², S. Vidhya ¹

Affiliations
1 Department of Electrical and Electronics Engineering, Kumaraguru College of Technology, IN
2 Department of Electrical and Electronics Engineering, Kumaraguru College of Technology, IN

Abstract

This paper presents about a new soft switching Boost-Boost DC/DC converter using partial resonant circuit. The proposed circuit consists of conventional buck boost converter and partial resonant circuit. The switching devices in this proposed converter are operated by soft switching with a new partial resonant circuit. The partial resonant circuit consists of series connected switch-diode pair with a resonant capacitor, which is operated to a loss-less snubber capacitor. The switching control technique of the converters are simplified and its drive in constant switching frequency.The simulink model for a proposed converter is developed using MATLAB and the same is used for simulation studies. The results from the simulation studies showed that effective soft-switching zero voltage switching (ZVS) and zero current switching (ZCS) action using partial resonant circuit with constant frequency than the regenerative snubber circuit.

Keywords

Buck-Boost Converter, Partial Resonant Circuit, Regenerative Snubber Circuit, Soft-Switching Technique.

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S. Vidhya ¹, K. Malarvizhi ², K. Baskaran ³, C. Udhaya Shankar ¹, P. Maithili ⁴

Affiliations
1 Department of Electrical and Electronics Engineering, Kumaraguru College of Technology, IN
2 Kumaraguru college of Technology, Coimbatore, IN
3 Government College of Technology, Coimbatore, IN
4 Department of Electrical and Electronics Engineering, Kumaraguru College of Technology, IN

Abstract

Multilevel inverter (MLI) is a new breed of power converter that is suited for high power applications. Multilevel inverter is an effective and practical solution for increasing power and reducing harmonics in ac waveforms. This paper focuses on the implementation of inverted sine PWM technique for asymmetric cascaded multilevel inverter with unequal DC sources. This technique combines the advantage of inverted sine PWM technique and asymmetric cascaded multilevel inverter with unequal DC sources. Performance evaluation of the proposed PWM strategy and inverter topology is done using MATLAB/SIMULINK for single phase asymmetric multilevel inverter.

Keywords

Asymmetric Multilevel Inverter, Multi-Carrier PWM, ISCPWM Technique, THD, Fundamental Output Voltage.

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K. Malarvizhi ¹, D. Ramya Devi ¹, Alfred Raymond ², B. N. Vedha Hari ¹

Affiliations
1 School of Chemical and Biotechnology, SASTRA University, Thanjavur-613401, Tamilnadu, IN
2 Sara Industries-ASD, Coimbatore, Tamilnadu, IN

Abstract

The objective of the work is to formulate, optimize and evaluate "Itraconazole nanosuspension as aerosol foam formulation" for the treatment of skin diseases such as Cellulitis, Erysipelas, Impeigo and Blastomycosis, Histoplasmosis, Onchomycosis, etc. The solubility of poorly soluble itraconazole can be improved through nanosuspension process and also the absorption rate and bioavailability of drug can be enhanced by means of aerosol foam dispersion at the site of application.

Keywords

Itraconazole, Nanosuspension, Wet Milling, Foam.

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