There is growing concern regarding the ability of GPS receivers to operate in the presence of in-band or nearband interference. In-band interference can occur deliberately from GPS jammers or naturally from spurious harmonics from nearby electronics that generate signal products that land in the GPS signal band. To support development and testing of GPS receivers in an interference environment,...

OBJECTIVE To investigate the reasons behind intentions to quit direct patient care among experienced general practitioners (GPs) aged 50-60 years. DESIGN AND SETTING Qualitative study based on semistructured interviews with GPs in the South West region of England. Transcribed interviews were analysed thematically. PARTICIPANTS 23 GPs aged 50-60 years: 3 who had retired from direct patient c...

This paper examines the performance of several precise point positioning (PPP) models, which combine dual-frequency GPS/Galileo observations in the un-differenced and between-satellite single-difference (BSSD) modes. These include the traditional un-differenced model, the decoupled clock model, the semi-decoupled clock model, and the between-satellite single-difference model. We take advantage ...

The University of Nottingham Ningbo China (UNNC) has full access to the Beidou system, QZSS, GLONASS, Galileo and GPS on its campus. Currently UNNC has a number of GNSS receivers that can access the multi-GNSS constellation, these being a ComNav K508 triple frequency GPS/BeiDou/GLONASS system, Unicore UR240-CORS-II and UR240-RTK GPS/BeiDou receivers, Javad SIGMA and TIUMPH-VS multi GNSS receive...

the aim of this research is to integrate the GPS tracking system (tracking device and web-based application) with GPS navigator for rental cars, allowing the user to use various applications to monitor and manage the cars. This is enable the firms and customers to communicate with each other via the GPS navigator. The system should be developed by applying new features in GPS tracking applicati...

GPS receivers are widely used in navigation and positioning, due to the global availability of GPS signals, its low cost and low power consumption. However, it does not work sufficiently in all signal environments. This raises the need to integrate GPS with other sensor systems (for instance, the inertial navigation system (INS)) to have a robust, continuous navigation solution regardless of th...

BACKGROUND There is a large variation in referral rates to secondary care among GPs, which is partly unexplained. AIM To explore associations between reasons for referral to secondary care and patient, GP, and healthcare characteristics. DESIGN AND SETTING A cross-sectional study in Northern Norway. METHOD Data were derived from 44 (42%) of 104 randomly selected GPs between 2008 and 2010....

OBJECTIVE To determine the prevalence of patient-initiated aggression toward general practitioners in Australia. DESIGN, SETTING AND PARTICIPANTS A cross-sectional national survey, conducted during February-May 2010, of 3090 GPs in 19 Divisions of General Practice, purposively sampled to represent urban, rural and remote areas. MAIN OUTCOME MEASURE Proportion of GPs experiencing patient-ini...

BACKGROUND General practitioners' (GPs') feelings of burnout or dissatisfaction may affect their patient care negatively, but it is unknown if these negative feelings also affect their mental health care. GPs' available time, together with specific communication tools, are important conditions for providing mental health care. We investigated if GPs who feel burnt out or dissatisfied with the t...