In this study, the authors derive the exact closed-form expression of the outage probability for coded cooperation using power-based approach. They consider a generalised system model with n relays (n > 1) over Nakagami-m fading channels. They also obtain the optimal number of relays for the given outage performance. Furthermore, they find analytically the critical cooperation ratio at which th...

We proposed a new physical layer technique that can enhance the security of cooperative relay communications. The proposed approach modifies the decoded message at the relay according to the unique channel state between the relay and the destination such that the destination can utilize the modified message to its advantage while the eavesdropper cannot. We present a practical method for secure...

The authors outlined a model to examine the modern printing machines’ unexpected breakdowns. They had been analysing the different downtimes for years. The results of the researches help to organize the pro-active maintenance at the graphic arts industry.

This paper investigates the performance of cooperative receive diversity, for the wireless body area network (WBAN) radio channel, compliant with the IEEE 802.15.6 Standard, in the case of monitoring a sleeping person. Extensive WBAN measurements near the 2.4 GHz ISM band were used. Up to 7 dB and 20% improvement for two-hop communications with the use of relays are empirically demonstrated wit...

We propose a method to calculate the outage probability of systems with multiple transmit antennas in frequency selective fading channels, where the multipaths may arrive at a fractional of symbol period. The design criteria of space-time codes in such channels are also briefly discussed.

The aim of this study was to analyze the impact categories bus downtime caused by necessity their repair on availability indicator. A retrospective covering 12 years operation carried using selected municipal transport company as an example. share in total time vehicle analyzed. Spearman’s rank correlation coefficient used for analysis. research covered seven makes and types buses six downtime....

Information Lifecycle Management is a must for ever growing healthcare databases. In practice, this problem is further compounded due to the evolving nature of these databases, where the schema itself evolves over time. In this paper, we describe PRLM (Patient Record Lifecycle Management), a tool developed to manage lifecycle of patient visit records of Ramakrishna Mission Sevashrama Hospitals ...

Introduction: Cyberattacks continue to plague medical systems across the world with nearly 24% of all cyber breaches impacting health systems. In Fall 2021, a large, tertiary care county hospital in Indianapolis, Indiana, USA suffered cyberattack, causing over four weeks downtime, forcing system revert paper charting and operate without electronic record (EMR) or internet. Communication Emergen...