Playa de Son Bou

Smartphone usage has reached its peak. There has be en a tremendous growth in the number of people migrating from PCs to smart phones. Numerous scenar ios such as loss of a phone, phone theft etc., can lead to unauthorized use of one’s own smartphone. T his raises the concern for securing personal and private data. This project proposes a light weight two level user identification scheme to recognize a nd authenticate the mobile phone based on the device h olding and usage patterns. To validate the proposed scheme, an application is created which takes a ges ture input characterized by time of swiping the scr een, finger pressure, phone movements and location of sw ipe on the screen through X and Y co-ordinate. A threshold based matching scheme performs classifica tion to find the true owner. Results show that the scheme was able to achieve 90% true positives and 1 0% false positives with a 0.5% of battery usage.

P LACEMENT O F E NERGY A WARE W IRELESS M ESH N ODES F OR E-L EARNING...

IJCI JOURNAL

Energy efficiency solutions are more vital for Gree n Mesh Network (GMN) campuses. Today students are benefited using these e-learning methodologies. Ren ewable energies such as solar, wind, hydro has tremendous applications on energy efficient wireles s networks for sustaining the ever growing traffic demands. One of the major issues in designing a GMN is minimizing the number of deployed mesh routers and gateways and satisfying the sustainable QOS bas ed energy constraints. During low traffic periods t he mesh routers are switched to power save or sleep mo de. In this paper we have mathematically formulated a single objective function with multi constraints to optimize the energy. The objective is to place min imum number of Mesh routers and gateways in a set of can didate location. The mesh nodes are powered using the solar energy to meet the traffic demands. Two g lobal optimisation algorithms are compared in this paper to optimize the energy sustainability, to gua rantee seamless connectivity

C OMPREHENSIVE S TUDY OF A COUSTIC C HANNEL M ODELS FOR U NDERWATER W I...

IJCI JOURNAL

In underwater acoustic communication, shallow water and deep water are two different mediums which exhibit many challenges to deal with due to the tim e varying multipath and Doppler Effect in the forme r case and multipath propagation in the latter case. In this paper, the characteristics of the acoustic propagation are described in detail and channel mod els based on the various propagation phenomena in shallow water channel and deep water channel as wel l are presented and the transmission losses incurre d in each model are thoroughly investigated. Signal t o noise ratio (SNR) at the receiver is thoroughly analyzed. Numerical results obtained through analyt ical simulations carried out in MATLAB bring to lig ht the important issues to be considered so as to deve lop suitable communication protocols for Underwater Wireless Communication Networks (UWCNs) to provide effective and reliable communication.

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