Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
Water state modification in hydration shells of protein molecules under the microwave irradiation
Water state modification in hydration shells of protein molecules under the microwave irradiation A F Korolev, A I Kostienko, A P Sukhorukov, I V Timoshkin* A Pulino** *Physics Department, Moscow State University, Vorobyevy Gory, Moscow, 119899, Russia. fax: 7 (095) 932 8820 e-mail: afc@rad255.phys.msu.su **Gamma Tel Cambridge, MA, 02139, USA Abstract The experimental results of water state modifi
Passive surveillance system for air traffic control
Passive surveillance system for air traffic control log. Vladimir Kubecek, CSc member of IEEE log. Pavel Sterba, member of IEEE. ERA a.s., Prumyslova 387, 530 03 Pardubice, Czech Republic. Abstr'clct A new passive radar based on the multilateration Time Difference Of Arrival (TDOA) technique is presented. The radar is dedicated for Air Traffic Control purposes. The system utilises Secondary Surve
On the optimisation of distributed ambiguity ratio and directivity for a synthetic aperture radar
On the optimisation of distributed ambiguity ratio and directivity for a synthetic aperture radar P James Matra Marconi Space, United Kingdom. Abstract Space borne Synthetic Aperture Radar (SAR) is a radar capable of high resolution imaging of the surface of the earth. Typical applications of a space borne SAR include the observation of oil slicks, ice packs, shipping lanes, industrial pollution a
Techniques for CFAR radar image detection in pulse jamming
Techniques for CFAR radar image detection in pulse jamming Christo Kabakchiev and Vera Behar Institute of Information Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria. Abstract The presence of strong pulse jamming in a reference window used by Cell-Averaging CFAR detectors for noise power estimation can cause drastic degradation in performance even if the CA CFAR detectors employ bi
A dedicated radar imaging statistical model of the scattering matrix initially characterised in an anechoïc chamber - Application to the Huynen parameters sensitivity analysis
A dedicated radar imaging statistical model of the scattering matrix initially characterised in an anechoic chamber - Application to the Huynen parameters sensitivity analysis L PRlOU, B UGUEN and G CHASSAY L.C.S.T. - U.R.A. 834 - I.N.S.A., 20, avenue des buttes de Coesmes, 35043 Rennes cedex, France Phone: +33-99 28 65 07 Fax: +33-99 38 62 48 Abstract A noise scattering matrix statistical model o
Surface bistatic scattering coefficient by means the facet model radar altimetry application
Surface bistatic scattering coefficient by means the facet model radar altimetry application* S Alessi, F De Acntis, G Picardi and R Sen. INFO-COM Dpt, University of Rome, "La Sapienza" via Eudossiana 18,00184 Roma, Italy. STS Studi TecnologieSistemi s.r.1., via O.Beccari 13,00154 Roma, Italy. e-mail: picar@infocom.ing.uniromal.it . (*) This work was supported by ASI (Italian Space Agency) and
Performance evaluation and comparison of variable structure multiple-model algorithms for tracking maneuvering radar targets
Performance evaluation and comparison of variable structure multiple-model algorithms for tracking maneuvering radar targets v P Jilkov, D S Angelova Laboratory for Parallel and Distributed Processing, Bulgarian Academy of Sciences, "Acad G. Bonchev" St, Bl. 25-A, 1113 Sofia, Bulgaria (E-mail: VPJILKOV@BGCICT.ACAD.BG) Abstract The variable structure approach to multiple model state estimation for
Helical antennas for multi-mode mobile phones
Helical antennas for multi-mode mobile phones Piiivi Haapala and Pertti Vainikainen Radio Laboratory of the Institute of Radio Communications, Helsinki University of Technology, Finland Abstract The use of helical antennas in handsets for multifrequency operation has been studied. It is shown that it is possible to obtain very wideband operation or two separate frequency bands of operation by usin
Design of variable phase bifilar helical antenna for mobile communication
Urban Wave Propagation Models
26th EuMC . 9.12 September 1996 . Hotel Hilton Atrium. Prague. Czech Republic Urban Wave Propagation Models Lajos Nagy, Zoltan Sandor, Zoltan Szabo and Tamas Csaba. Technical University of Budapest, Department of Microwave Telecommunications. email: t-nagy@nov.mht.bme.hu Abstract An error analysis of the COST 231 Walfish-Ikegami model [1] proposed for urban area and the demonstration of a