With the wide use of GPS, it becomes more and more important to improve the positioning accuracy. The GPS signal is very weak, and can be easily interfered. Space-time adaptive processing(STAP) can suppress the jamming not only in the temporal domain, but also in the spatial domain. STAP has now become a good candidates for jamming mitigation in GPS. In order to evaluate the performance of vari...

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...

Aircraft landing using the Global Positioning System (GPS) in equatorial regions is more difficult than in other regions because ionospheric scintillation is prevalent. Ionospheric scintillation causes amplitude fades of 20 dB or more and an increase in the phase jitter. This research evaluates techniques to enhance a GPS receiver for overcoming ionospheric scintillation. To validate the design...

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...

In the framework of the GRIM series of gravity field models, the CNES/GRGS GINS precise orbit determination software has been adapted to dynamic GPS data processing. That is simultaneous processing of all available observables (i.e. GPS, DORIS, Laser) and all available satellite orbits (i.e. GPS, TOPEX/POSEIDON) can now be performed. The TOPEX/POSEIDON (T/P) mission satellite is equipped with a...

BACKGROUND GPs typically sanction absence from work by issuing sickness certificates. There has been some debate recently about changing the way sickness certificates are issued and by whom. However, without understanding GPs' certification practices, their requirements in terms of training and education and how they feel the certification process should or should not be changed, measures aimed...

OBJECTIVE The aim of this study is to analyse the interaction between patients and GPs in preventive consultations with an emphasis on how patients answer GPs' questions about lifestyle, and the conditions these answers impose on the process of establishing agreement about lifestyle as a problem or not. DESIGN Six general practitioners (GPs) video-recorded 15 annual preventive consultations. ...

OBJECTIVE To compare the quality of care provided by general practitioners participating in diabetes shared-care registers with that provided by GPs not using registers. DESIGN Cross-sectional comparison using Health Insurance Commission (HIC) data for patients attending the GPs. PARTICIPANTS AND SETTING 155 GPs using diabetes registers, 459 GPs not using registers, and their patients with ...

BACKGROUND GPs are the health professionals most frequently consulted by adolescents. However, discussion between GPs and adolescents regarding cannabis use does not occur spontaneously. OBJECTIVE To identify obstacles to the identification and management of cannabis use by adolescents based on GPs' experiences. METHODS We conducted a qualitative study using focus groups of GPs from the Auv...