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The recent advances in wireless energy transfer technology provide a promising way to solve the problem of limited battery capacity of sensor nodes in wireless sensor networks. Adoption of mobile charger in the wireless rechargeable sensor networks (WRSNs) makes it easier to charge sensor nodes rather than charging with energy harvesting schemes. However, many existing energy replenishment schemes...
Sink mobility has been proven to be an effective way for minimizing delay in data delivery and mitigating the hot spot problem in wireless sensor networks (WSNs). However, there is an impact of the path selection for the mobile sink on the data delivery delay. Hence selection of optimal number of halting positions called rendezvous points (RPs) and their locations are challenging in WSNs. In this...
Spectral efficiency and capacity of Land Mobile Satellite (LMS) systems can be enhanced by using MIMO (Multiple Input Multiple Output). Polarization diversity is an efficient technique to realize MIMO in LMS communications. Polarization diversity employs different polarization to realize multiple independent propagation paths. Dual polarized antennas offer a space and cost effective alternative compared...
The utilisation of smart antenna (SA) techniques in future wireless and cellular networks is expected to have an impact on the efficient use of the spectrum and the optimization of service quality. This is because SAs can enhance the maximization of output power of the signal in desired directions amongst a whole lot of functions. In spite of these benefits of SAs, long range communications still...
The coverage of interest points (targets) by mobile sensors in Wireless Sensor Networks is a very important and challenging problem. As the sensors are deployed randomly, initial placements of sensors may not guarantee coverage of all targets. In this paper, we consider the problem of covering all the targets in the surveillance region by relocating a subset of the sensors with the objective of minimizing...
Recent advances in signal processing and the revolution by the mobile technologies have spurred several innovations in all the areas and albeit more so in home based tele-medicine. We used variational mode decomposition (VMD) based denoising on large-scale phonocardiogram (PCG) data sets and achieved better accuracy. We have also implemented a reliable, external hardware and mobile based phonocardiography...
Wireless sensor networks (WSN) are widely used various applications such as disaster management, search and rescue operation, wild life monitoring, remote patient monitoring, structural health monitoring etc. It provides bridge between the real physical and virtual worlds. In many scenarios, the coverage area of the WSN will be very large and a multi-hop adhoc network needs to be maintained for the...
Stroke is one of the leading causes of death and disability in India, and the prevalence of this disorder shows a steep rise in the recent decades. Among the many consequences of stroke, the loss of the ability to use language — i.e., aphasia — is a major detriment to the quality of life of the affected individuals. In the recent past, the rise of model-driven treatment approaches has shown promising...
A MIMO antenna system comprising of two antenna elements is proposed for utilization in Long Term Evolution (LTE) frequencies for mobile terminals. The antenna element is a coupled fed printed monopole capable of functioning at LTE 2300 on a printed circuit board. The antennas are located symmetrically on the top side of the circuit board. The substrate used here is FR4 which possesses a relative...
With the popularity of mobile devices, wearables and auxiliaries such as stylus, a number of possible modes for interaction are available. However, the concept of simultaneous copying of multiple snippets of text is not yet widely available. It might be useful to the user to paste multiple snippets of text simultaneously, rather than copy and paste individual snippets multiple times. Multiple copy...
Using a qualitative framework created for assessing participation in online communities, the study explores participation and mobilization in mobile communities with data collected from interviews and content analysis of conversations. A WhatsApp Blood Donation Volunteer group in Ernakulam was chosen for the case study.
Advancements in game design, mobile technologies and game play have made researching into Massively Multiplayer Online Games a completely different genre altogether demanding interdisciplinary methodology and integration of different perspectives. The current study uses definitions borrowed from the MDA framework and combines it with active user perspectives and components of formal analysis to explore...
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