Dr Rajendran Parthiban is a Professor at the School of Engineering, Monash University Malaysia. He completed his BE (Hons) in 1997 and PhD in 2004 both from the University of Melbourne, Australia.
Journal of Micromechanics and Microengineering, 2016
Zinc oxide (ZnO) nanowires were directly synthesized on high temperature stable one-port surface ... more Zinc oxide (ZnO) nanowires were directly synthesized on high temperature stable one-port surface acoustic wave (SAW) resonators made of LiNbO3 substrate and Pt/Ti electrodes using a self-seeding catalyst-free thermal evaporation method. To enhance post-growth device functionality, one half of an SAW resonator was masked along the interdigital transducer aperture length during the nanowire growth process using a stainless steel shadow mask, while the other half was used as the ZnO nanowire growth site. This was achieved by employing a precisely machined stainless steel sleeve to house the chip and mask in the reaction chamber during the nanowire growth process. The ZnO nanowire integrated SAW resonator exhibited ultraviolet radiation sensing abilities which indicated that the ZnO nanowires grown on the SAW device were able to interact with SAW propagation on the substrate even after the device was exposed to extremely harsh conditions during the nanowire growth process. The use of a thermal evaporation method, instead of the conventionally used solution-grown method for direct growth of ZnO nanowires on SAW devices, paves the way for future methods aimed at the fabrication of highly sensitive ZnO nanowire-LiNbO3 based SAW sensors utilizing coupled resonance phenomenon at the nanoscale.
2015 IEEE Summer Topicals Meeting Series (SUM), 2015
We develop a model for OFDM based VLC systems capable of predicting the SNR at the receiver. The ... more We develop a model for OFDM based VLC systems capable of predicting the SNR at the receiver. The proposed models are more feasible for practical application. They are experimentally evaluated and the limitations presented.
Proceedings of the 1st Workshop on Green Computing - GCM '10, 2010
Page 1. N. Dharmaweera School of Engineering Monash University Bandar Sunway, Malaysia +603-55146... more Page 1. N. Dharmaweera School of Engineering Monash University Bandar Sunway, Malaysia +603-55146259 madushanka.nishan@ eng.monash.edu.my R. Parthiban School of Engineering Monash University Bandar Sunway ...
ABSTRACT As a new generation green lighting source, the light emitting diode (LED) is rapidly rep... more ABSTRACT As a new generation green lighting source, the light emitting diode (LED) is rapidly replacing traditional incandescent and fluorescent light sources. Apart from providing energy savings, the use of LED lighting technology creates scope for an innovative optical wireless communication technology known as visible light communication (VLC), which takes advantage of the superior modulation capability of LEDs to transmit data through a wireless channel. VLC is capable of concurrently providing communication as well as illumination. For making commercial implementation of VLC feasible, it is necessary to incorporate it with dimming schemes that will provide energy savings, moods, and increase the aesthetic value of the place using this technology. However, general dimming techniques have an adverse effect on communication since they limit the achievable data rate of a VLC link. This drives the necessity of formulating efficient dimming techniques, which will create a balance between the two most basic functions of VLC: illumination and communication. This paper focuses on dimming mechanisms that can be implemented in VLC systems to save energy and provide precise illumination control. The motivation behind this control mechanism, current challenges in practical implementation, driver circuitry, recent progress, and future prospects are also concisely presented.
ABSTRACT The year-by-year increase in electricity consumption significantly �affects all nations ... more ABSTRACT The year-by-year increase in electricity consumption significantly �affects all nations today from environmental, social, and economic perspectives. Various studies show that, among the contributors of this increase, power consumption of the equipment forming the Internet infrastructure is significant�. Consequently, considerable attention is given to �nding solutions to reduce power consumption of the systems that run the Internet. Current literature suggests that the optical backbone network is responsible for the majority of the consumed power, especially at high traffic loads. This highlights the importance of formulating solutions to reduce power consumption in backbone networks. In this paper, we provide a comprehensive survey of the most relevant research efforts on minimizing power consumption of backbone networks. We categorize our review into four broad approaches: network redesign, traffic engineering, power-aware networking, and load-adaptive operation. We highlight the �findings of relevant studies and provide an analysis of their limitations. We also evaluate the technological differences of similar work and identify a number of future directions. Finally, we demonstrate that the adoption of these technologies is gathering pace among prominent research bodies, device manufacturers, and network operators.
2007 International Conference on Industrial and Information Systems, 2007
We investigate the optimal level of IP integration for the deployment of an automatically switche... more We investigate the optimal level of IP integration for the deployment of an automatically switched optical network (ASON). We design and analyze a national network delivering a high bandwidth access to every user, and investigate the capital cost of ASONs with IP routers. Based on this analysis, we show that an ASON with IP routers at the edge is more
Journal of Micromechanics and Microengineering, 2016
Zinc oxide (ZnO) nanowires were directly synthesized on high temperature stable one-port surface ... more Zinc oxide (ZnO) nanowires were directly synthesized on high temperature stable one-port surface acoustic wave (SAW) resonators made of LiNbO3 substrate and Pt/Ti electrodes using a self-seeding catalyst-free thermal evaporation method. To enhance post-growth device functionality, one half of an SAW resonator was masked along the interdigital transducer aperture length during the nanowire growth process using a stainless steel shadow mask, while the other half was used as the ZnO nanowire growth site. This was achieved by employing a precisely machined stainless steel sleeve to house the chip and mask in the reaction chamber during the nanowire growth process. The ZnO nanowire integrated SAW resonator exhibited ultraviolet radiation sensing abilities which indicated that the ZnO nanowires grown on the SAW device were able to interact with SAW propagation on the substrate even after the device was exposed to extremely harsh conditions during the nanowire growth process. The use of a thermal evaporation method, instead of the conventionally used solution-grown method for direct growth of ZnO nanowires on SAW devices, paves the way for future methods aimed at the fabrication of highly sensitive ZnO nanowire-LiNbO3 based SAW sensors utilizing coupled resonance phenomenon at the nanoscale.
2015 IEEE Summer Topicals Meeting Series (SUM), 2015
We develop a model for OFDM based VLC systems capable of predicting the SNR at the receiver. The ... more We develop a model for OFDM based VLC systems capable of predicting the SNR at the receiver. The proposed models are more feasible for practical application. They are experimentally evaluated and the limitations presented.
Proceedings of the 1st Workshop on Green Computing - GCM '10, 2010
Page 1. N. Dharmaweera School of Engineering Monash University Bandar Sunway, Malaysia +603-55146... more Page 1. N. Dharmaweera School of Engineering Monash University Bandar Sunway, Malaysia +603-55146259 madushanka.nishan@ eng.monash.edu.my R. Parthiban School of Engineering Monash University Bandar Sunway ...
ABSTRACT As a new generation green lighting source, the light emitting diode (LED) is rapidly rep... more ABSTRACT As a new generation green lighting source, the light emitting diode (LED) is rapidly replacing traditional incandescent and fluorescent light sources. Apart from providing energy savings, the use of LED lighting technology creates scope for an innovative optical wireless communication technology known as visible light communication (VLC), which takes advantage of the superior modulation capability of LEDs to transmit data through a wireless channel. VLC is capable of concurrently providing communication as well as illumination. For making commercial implementation of VLC feasible, it is necessary to incorporate it with dimming schemes that will provide energy savings, moods, and increase the aesthetic value of the place using this technology. However, general dimming techniques have an adverse effect on communication since they limit the achievable data rate of a VLC link. This drives the necessity of formulating efficient dimming techniques, which will create a balance between the two most basic functions of VLC: illumination and communication. This paper focuses on dimming mechanisms that can be implemented in VLC systems to save energy and provide precise illumination control. The motivation behind this control mechanism, current challenges in practical implementation, driver circuitry, recent progress, and future prospects are also concisely presented.
ABSTRACT The year-by-year increase in electricity consumption significantly �affects all nations ... more ABSTRACT The year-by-year increase in electricity consumption significantly �affects all nations today from environmental, social, and economic perspectives. Various studies show that, among the contributors of this increase, power consumption of the equipment forming the Internet infrastructure is significant�. Consequently, considerable attention is given to �nding solutions to reduce power consumption of the systems that run the Internet. Current literature suggests that the optical backbone network is responsible for the majority of the consumed power, especially at high traffic loads. This highlights the importance of formulating solutions to reduce power consumption in backbone networks. In this paper, we provide a comprehensive survey of the most relevant research efforts on minimizing power consumption of backbone networks. We categorize our review into four broad approaches: network redesign, traffic engineering, power-aware networking, and load-adaptive operation. We highlight the �findings of relevant studies and provide an analysis of their limitations. We also evaluate the technological differences of similar work and identify a number of future directions. Finally, we demonstrate that the adoption of these technologies is gathering pace among prominent research bodies, device manufacturers, and network operators.
2007 International Conference on Industrial and Information Systems, 2007
We investigate the optimal level of IP integration for the deployment of an automatically switche... more We investigate the optimal level of IP integration for the deployment of an automatically switched optical network (ASON). We design and analyze a national network delivering a high bandwidth access to every user, and investigate the capital cost of ASONs with IP routers. Based on this analysis, we show that an ASON with IP routers at the edge is more
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