871 research outputs found
Noise Parameters of CW Radar Sensors Used in Active Defense Systems
Active defense represents an innovative way of protecting military vehicles. It is based on the employment of a set of radar sensors which detect an approaching threat missile and activate a suitable counter-measure. Since the radar sensors are supposed to detect flying missiles very fast and, at the same time, distinguish them from stationary or slow-moving objects, CW Doppler radar sensors can be employed with a benefit. The submitted article deals with a complex noise analysis of this type of sensors. The analysis considers the noise of linear and quasi-linear RF components, phase-noise of the local oscillator as well as the noise of low-frequency circuits. Since the incidence of the phase-noise depends strongly upon the time delay between the reference and the cross-talked signals, a new method of measuring noise parameters utilizing a reflecting wall has been developed and verified. The achieved results confirm potentially high influence of the phase-noise on the noise parameters of the mentioned type of radar sensors. Obtained results can be used for the analysis of noise parameters of the similar but even more complex sensors
Wearable device to assist independent living.
Older people increasingly want to remain living independently in their own homes. The aim of the ENABLE project is to develop a wearable device that can be used both within and outside of the home to support older people in their daily lives and which can monitor their health status, detect potential problems, provide activity reminders and offer communication and alarm services. In order to determine the specifications and functionality required for development of the device user surveys and focus groups were undertaken and use case analysis and scenario modeling carried out. The project has resulted in the development of a wrist worn device and mobile phone combination that can support and assist older and vulnerable wearers with a range of activities and services both inside and outside of their homes. The device is currently undergoing pilot trials in five European countries. The aim of this paper is to describe the ENABLE device, its features and services, and the infrastructure within which it operates
Magnetic resonance imaging for the treatment planning in invasive carcinoma of the cervix in pregnant women
Successful use of activated recombinant factor FVIIa in the management of intra abdominal haemorrhage after cytoreductive surgery for advanced carcinoma of the ovary - a case report
Making video communication mobile by using a small humanoid social assistive robot
There is a high need among older persons to maintain their social contacts and to stay involved in social life. In this area of social communication ICT and assistive technology can bring a significant support provided that the actual needs and preferences of the user groups are actually met. The paper describes an innovative solution consisting of a mobile video communication facility using a LED projector which is integrated in a social assistive robot system developed in the framework of the KSERA project
Making video communication mobile by using a small humanoid social assistive robot
There is a high need among older persons to maintain their social contacts and to stay involved in social life. In this area of social communication ICT and assistive technology can bring a significant support provided that the actual needs and preferences of the user groups are actually met. The paper describes an innovative solution consisting of a mobile video communication facility using a LED projector which is integrated in a social assistive robot system developed in the framework of the KSERA project
Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion
CW-type structures belong to the most frequently employed radars, especially in a form of small sensors used, for example, in security applications or automotive industry. Range and reliability of operation of these sensors strongly depend upon their noise parameters. This paper extends previously published works by considering all potential inner noise sources and creating complex noise model of the concerned radar family including often used IQ signal processing. The noise sources cover local oscillator amplitude-noise and phase-noise, noise of a RF signal path and noise of a low-frequency signal path. The resulting noise model was verified by practical measurements which included different local oscillator types, different low-frequency bandwidths and different time-delays of the cross-talked signals. In all cases, the agreement between theory and measurement was within estimated limits. The developed model is applicable for noise analysis and design of all common CW-type radars
Sentinel lymph node in vulvar cancer - a pilot study to identify and assess the diagnostic value
EMon : embodied monitorization
Serie : Lecture Notes in Computer Science, vol. 5859The amount of seniors in need of constant care is rapidly rising: an
evident consequence of population ageing. There are already some
monitorization environments which aim to monitor these persons while they
remain at home. This, however, although better than delocalizing the elder to
some kind of institution, may not still be the ideal solution, as it forces them to
stay inside the home more than they wished, as going out means lack of
accompaniment and a consequent sensation of fear. In this paper we propose
EMon: a monitorization device small enough to be worn by its users, although
powerful enough to provide the higher level monitorization systems with vital
information about the user and the environment around him. We hope to allow
the representation of an intelligent environment to move with its users, instead
of being static, mandatorily associated to a single physical location. The first
prototype of EMon, as presented in this paper, provides environmental data as
well as GPS coordinates and pictures that are useful to describe the context of
its user
Strike point splitting induced by the application of magnetic perturbations on MAST
Divertor strike point splitting induced by resonant magnetic perturbations
(RMPs) has been observed on MAST for a variety of RMP configurations in a
plasma scenario with Ip=750kA where those configurations all have similar
resonant components. Complementary measurements have been obtained with
divertor Langmuir probes and an infrared camera. Clear splitting consistently
appears in this scenario only in the even configuration of the perturbation
coils, similarly to the density pump-out. These results present a challenge for
models of plasma response to RMPs.Comment: 9 pages, 4 figures, submitted to the proceedings of the 20th
Conference on Plasma Surface Interactions, to be published in the Journal of
Nuclear Material
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