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This paper presents numerical scenarios concerning penetration in a lossy medium that can be obtained by radiating inhomogeneous electromagnetic waves. Former papers approached this problem, both analytically and numerically, finding requirements and limits of the so-called “deeppenetration” condition, which consists of a wave transmitted in a lossy medium having an attenuation vector whose direction...
Recent studies highlighted deep-penetration prop-erties of inhomogeneous waves at the interface between a loss-less and a lossy medium. Such waves can be generated bymeans of radiating structures known as Leaky-Wave Anten-nas (LWAs). Here, a different approach is proposed basedon the use of a lossy prism capable to generate an inhomo-geneous wave when illuminated by a homogeneous wave. Thelossy prism...
The penetration properties of inhomogeneous waves are illustrated. A theoretical approach is presented and a leaky-wave antenna design is proposed in order to verify the theoretical implications. Practical aspects related to the excitation of leaky waves able to give rise to deep penetration effects in lossy media are discussed and the possible implementation issues are commented.
While many seafloor surveys provide a growing number of data, only few automatic techniques are developed to analyze images. This study is interested in the automatic detection and quantification of microbial mats and fields of siboglinid polychaete (tubeworm) colonizing the seafloor of the deep-sea Hakon Mosby Mud Volcano surveyed by ROV. Three algorithms are developed to segment the high resolution...
This paper describes the new survey module (called "Module de Mesures en Route"), of the remotely operated vehicle (ROV) Victor 6000 and presents the first results obtained during two scientific cruises held during the summer of 2006 (Viking and Momareto).
EXOCET/D was a three-year project that started in 2004 and that was funded by the European Commission (STREP, FP6-GOCE-CT-2003-505342). The general objective of this project was to develop, implement and test specific technologies aimed at exploring, describing and quantifying biodiversity in deep-sea fragmented habitats as well as at identifying links between community structure and environmental...
The last case of poliomyelitis due to transmission of indigenous wild poliovirus occurred in Italy in 1982. To achieve the certification of the eradication of poliomyelitis in Italy, an active surveillance of acute flaccid paralysis (AFP) in the population aged less than 15 years was set up following the World Health Organization (WHO) guidelines. The survey started in 1996 with a pilot study involving...
Surveillance of suspected poliomyelitis cases was conducted in Albania from 1980 through 1995. A total of 93 cases were reported, 11 of which were clinically defined as poliomyelitis cases according to WHO criteria. Poliovirus was isolated from six subjects who were defined as contact vaccine-associated cases. Characterization of isolates by both antigenic and molecular methods showed that, in all...
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