330 research outputs found
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No full textRede,
in verkorte vorm uitgesproken
ter gelegenheid van het aanvaarden
van het ambt van bijzonder hoogleraar
in de virologie aan het Erasmus
faculteit van de Erasmus Universiteit
Rotterdam op 8 maart 200
Coherent Multistatic Radar Imaging
No full textAfter a MIMO revolution in the telecommunications world, this technology becomes increasingly popular in the radar world. The radar end-users are demanding more and more of their systems, while the targets are designed to have an as small as possible RCS, which makes them more difficult to detect. With multiple transmitters and receivers it may be possible meet the stringent demands of the users. Extending monostatic radar functions like target localization and Doppler velocity estimation to a multistatic configuration will show some significant improvements in resolution and overall situational awareness. With multistatic target localization, the cross-range resolution can be greatly improved and the overall system is much less susceptible to dips in the RCS, because it sees the target from different angles. With multistatic Doppler velocity estimations, a complete 2D or 3D target velocity vector can be composed to aid tracking and imaging techniques like ISAR. Multistatic ISAR is a perfect example of the strength of combining multiple radars. It can be used to achieve a higher resolution for the same integration time as a monostatic radar, or it allows a reduction of integration time, with a resolution equal to the monostatic case. A new concept in multistatic ISAR is the interpolation of the ISAR data. In case the geometry between the target and the radars does not meet the requirements for coherent combining the images, an interpolation of the data can be done. Not only the geometrical requirements can be eased, also the integration time can be artificially increased, allowing the radars to spend more time on other functions. Another new approach to multistatic ISAR is the incoherent combination of multiple ISAR images. This concept is called 2D ISAR and allows the creation of high resolution images with low resolution surveillance and MTI radars. The main idea of 2D ISAR is seeing the target under different angles, so the amplitude of the summation of scatters will be higher than that of the sidelobes, which allows to estimate the overall target dimensions.TelecommunicationsElectrical Engineering, Mathematics and Computer Scienc
Haarlem Spaarnwoude Transferium
No full textA new sponge connecting three dislocated area's in one unified building which host the new Transferium for Haarlem Spaarnwoude with 550 parking places, a Children's daycare center, An information center, A restaurant, A giftshop, A outdoor theatre and the renewed hotel which was present at the existing location. All these functions will be connected with a 23.000m2 public landscape bridging the river "Liede" and forming a new gateway to explore the beautiful surroundings of Haarlem.ArchitectureArchitectural EngineeringArchitectur
The Role of Small Round-Structured Viruses (SRSV) in Outbreaks of Gastroenteritis in The Netherlands
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Authors’ reply: Management of patients with Ebola virus disease in Europe: High-level isolation units should have a key role
No full textBurden of norovirus in healthcare facilities and strategies for outbreak control
No full textNorovirus is the most frequently occurring cause of community-acquired acute gastroenteritis in people of all ages. It is also one of the most frequent causes of outbreaks in healthcare settings, affecting both long-term care facilities and acute care hospitals. Whereas norovirus gastroenteritis is typically mild and resolves without medical attention, healthcare-associated infections often affect vulnerable populations, resulting in severe infections and disruption of healthcare services. Globally, most norovirus outbreaks in hospitals and residential care institutions are associated with genogroup II type 4 (GII.4) strains. Recent data demonstrate that excess mortality occurs during outbreak periods in healthcare facilities. Nosocomial outbreaks can result in large economic and societal costs. Current control measures for norovirus are largely based on general infection control principles, and treatment is mainly supportive and non-specific. While neither vaccines nor antiviral agents are currently available, both are being developed with encouraging results
The Incidence and Genetic Variability of Small Round-Structured Viruses in Outbrreaks of Gastroenteritis in The Netherlands
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