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A Custom Digital Intermediate Frequency Filter for the American Mobile Telephone System

A digital filter for intermediate frequency filtering in mobile communication systems is presented. The purpose of the work is to show an alternative to the analog filters which are used in most of today's heterodyne receivers. Bit-serial arithmetic is applied on a twelfth-order wave digital lattice filter algorithm. The paper also shows a method for retiming such algorithms. The power consumption

On-line Heart Rate Monitoring Using the Extra-corporeal Pressure Sensors of a Dialysis Machine

Heart rate can be extracted from the extracorporeal venous pressure signal of a dialysis machine. The results are of comparable accuracy and reliability to the ones obtained by the PPG reference signal from a pulse oximeter. Difficulties that occur during heart rate estimation were determined, and some can be overcome by a slight adjustment of blood flow rate. The described techniques, after being

Elastin- and Collagen-Rich Human Carotid Plaques Have Increased Levels of the Cysteine Protease Inhibitor Cystatin C.

Background: Cystatin C is a major inhibitor of the elastin- and collagen-degrading cysteine proteases and may therefore have an important role in preserving atherosclerotic plaque stability. In this study we analyzed the associations between human carotid plaque cystatin C expression and the plaque content of collagen and elastin. Methods: Thirty-one plaques were removed by endarterectomy and homo

Riskabelt att skapa låtsasmarknader i välfärden

Vinsterna bland företagen i välfärdssektorn kan bara hämtas hem genom att krympa kostnaderna. Men att låta företag agera på låtsasmarknader, där nedskärningar är det enda sättet att gå med vinst på kort sikt, är en riskabel väg i välfärdsbyggandet.

An Innovative Systems Approach for Research on Urban Risk Reduction and Climate Change Adaptation

This paper presents an innovative research on urban risk reduction and climate change adaptation that combines case studies, grounded theory and systems analysis, which could be used as a template for similar intersectoral and interdisciplinary investigations. Such a ‘case studies–grounded theory–systems analysis approach’ permits a grounded theory to be built from case study data, which is viewed