ZigBee technology is a kind of self organization of short distance, strong anti-interference, low cost, emerging wireless sensor network application that has attracted wide attention. Therefore, this paper studies and designs a real-time positioning system of underground personnel based on ZigBee system, the positioning of the sensor carrying miners through the wireless sensor network. This wil...

We give a simple explicit formula for turnover reduction when a large number of alphas are traded on the same execution platform and trades are crossed internally. We model turnover reduction via alpha correlations. Then, for a large number of alphas, turnover reduction is related to the largest eigenvalue and the corresponding eigenvector of the alpha correlation matrix.

More police reduces crime but little is know about the mechanism. Does more police deter crime by reducing its attractiveness, or is the reduction driven by an incapacitation of recurrent criminals? This paper exploits micro-level data on single robberies together with redeployments of two police forces within a city, providing first evidence of (negative) incapacitation that is driven by reduc...

Issue: When benchmarking (as in engagement, work‐ stress, safety, or performance‐related applications), the use of normative scores can be a big mistake. Because if the norm group characteristics change in any way, the entire benchmarking process is rendered problematic. More importantly, if score magnitudes are considered related to performance, then it is the actual score which carries that r...

INTRODUCTION Critical Care Continuous EEG (CCEEG) is a common procedure to monitor brain function in patients with altered mental status in intensive care units. There is significant variability in patient populations undergoing CCEEG and in technical specifications for CCEEG performance. METHODS The Critical Care Continuous EEG Task Force of the American Clinical Neurophysiology Society deve...

This study investigated the impact of motivation on employee turnover in Telecom sector of Pakistan. The questionnaire used was designed to focus on motivation and turnover questions. One hundred and six close-ended questionnaires were used for analyses. Regression and correlation analyses were proposed to explore the impact of motivation on employee’s intention to quit. Motivation was establis...