Estimating the Characteristics of the Forward Voltage Gain Scattering Parameter of Indoor Power Line Channel Using Only Input Port Measurement

Estimation of the characteristics of power line channel is a pre-requisite for successful implementation of any power line communication system. This paper presents a method to estimate the forward voltage gain scattering parameters (S21) of an indoor power line using only the input port reflection coefficient (S11). The measured input parameter with one/two load placed at the output suffices to estimate the S21 as far as frequency selectivity is concerned. The positions of notches can be estimated within a limit of error with positive and at times high correlation between the experimental and evaluated S21 parameters. The method is validated for a number of practical networks, and also for random channels with different types of loads and cables found in the papers. The procedure can be incorporated in estimating the channel for mitigating the related problems

NETIMIS: Dynamic Simulation of Health Economics Outcomes Using Big Data

Many healthcare organizations are now making good use of electronic health record (EHR) systems to record clinical information about their patients and the details of their healthcare. Electronic data in EHRs is generated by people engaged in complex processes within complex environments, and their human input, albeit shaped by computer systems, is compromised by many human factors. These data are potentially valuable to health economists and outcomes researchers but are sufficiently large and complex enough to be considered part of the new frontier of ‘big data’. This paper describes emerging methods that draw together data mining, process modelling, activity-based costing and dynamic simulation models. Our research infrastructure includes safe links to Leeds hospital’s EHRs with 3 million secondary and tertiary care patients. We created a multidisciplinary team of health economists, clinical specialists, and data and computer scientists, and developed a dynamic simulation tool called NETIMIS (Network Tools for Intervention Modelling with Intelligent Simulation; http://www.netimis.com) suitable for visualization of both human-designed and data-mined processes which can then be used for ‘what-if’ analysis by stakeholders interested in costing, designing and evaluating healthcare interventions. We present two examples of model development to illustrate how dynamic simulation can be informed by big data from an EHR. We found the tool provided a focal point for multidisciplinary team work to help them iteratively and collaboratively ‘deep dive’ into big data

A study of asynchronous noise in indoor power line with applications to power line communication

Abstract Power line channels do not have standard models for noise simulation. As such, study and analysis of different types of noise is imperative to developing channel simulator where communication systems can be tested and optimized for maximum efficiency. This is an indispensable part in developing power line communication systems that uses the available power line as a communication channel. This paper analyzes the asynchronous impulsive noise in indoor power line channels. The experimental setup for noise acquisition is described in detail. It is found that the impulse amplitude and the impulse durations follow the t-location scale and the log-logistic distribution better than other distribution tested. Such a distribution is easier to handle in terms of random number generation using the inverse cumulative distribution method. This can be used in the random noise simulation of impulsive noise in the generation of overall power line noise for system testing and optimization.</jats:p

Search for radio signal associated with UHE cosmic ray air showers in VLF range

436-439Experimental studies on the possibilities of detection of radio emission from ultra high energy cosmic ray (UHECR) extensive air shower (EAS) are done with the help of loop antenna system in the LF/VLF region. The signals from the loop for different orientations are analyzed off-line. The antenna is operated in coincidence with the particle detectors of mini-array to select the radio pulses originated from UHECR EAS. The experimental arrangement and important conclusion are discussed in the paper