Arnongst the many possible voice functions that can be implemented, voice coding has carried the most promise of finding early applications due to potential use in the existing telecommunications networks. However, commercial realisation of this opportunity has been somewhat retarded, partly due to the problern of coding voice down to low data rates not being addressed adequately. Whereas this ...

During the last decade several standards for Mobile telecommunications have been developed. The best known is without any doubt the Global Standard for Mobile Communications (GSM) which is operational in many countries, both within and outside Europe. It is now the most successful standard for mobile communications. Also the Digital Enhanced Cordless Telecommunications (DECT) was successfully i...

We performed two case-control studies on brain tumours diagnosed during 1 January 1997 to 30 June 2000 and 1 July 2000 to 31 December 2003, respectively. Living cases and controls aged 20-80 years were included. An additional study was performed on deceased cases with a malignant brain tumour using deceased controls. Pooled results for glioma yielded for ipsilateral use of mobile phone odds rat...

A new tool optimizes the placement of base stations for local wireless communications at company sites. It uses the latest in constraint-based programming technology.

BACKGROUND To study the association between use of wireless phones and meningioma. METHODS We performed a case-control study on brain tumour cases of both genders aged 18-75 years and diagnosed during 2007-2009. One population-based control matched on gender and age was used to each case. Here we report on meningioma cases including all available controls. Exposures were assessed by a questio...

AIM To investigate the association between the use of cellular or cordless telephones and the risk for salivary gland tumours. METHODS Cases were assessed from the six regional cancer registries in Sweden. Four controls matched for sex and age in five year age groups were selected for each case. A total of 293 living cases and 1172 controls were included. RESULTS There were 267 (91%) partic...

Objective The purpose of this study was to measure the temperature of the plugger tip of 3 cordless heat carriers set at 200°C. Materials and Methods Pluggers of the same taper (0.06, 0.08, 0.10) and similar tip sizes (sizes of 50 and 55) from 3 cordless heat carriers, namely SuperEndo-α2 (B & L Biotech), Friendo (DXM), and Dia-Pen (Diadent), were used and an electric heat carrier, System B (...