1,720,964 research outputs found
Telemetry BER with unsynchronized ranging signalinterference
No full textCCSDS (Consultative Committee for Space Data Systems) 2006 Spring meeting, Rome (Italy), paper SLS-RNG 06-0
Performance of the ranging clock synchronizer inthe presence of telemetry interference
No full textCCSDS (Consultative Committee for Space Data Systems) 2006 Spring meeting, Rome (Italy), paper SLS-RNG 06-0
The brown bear population of Abruzzo
No full textThe Ursus arctos population of the Abruzzo National Park seems relatively stable, despite occasional fluctuations. An increase of the bear range has occurred recently for a mean distance of 36km beyond the former range. Invading wild boars Sus scrofa from outside areas may compete for food with the bears.-Author
Ranging system performance with un-synchronizedtelemetry interference
No full textCCSDS (Consultative Committe for Space Data Systems) 2006 Spring meeting, Rome (Italy), paper SLS-RNG 06-0
PN regenerative ranging and its compatibility with telecommand and telemetry signals
No full textThe paper investigates the performance of a satellite communication system in which the onboard receiver regenerates the uplink pseudonoise (PN) ranging sequence. Using phase modulation, the PN ranging signal is transmitted together with the telecommand signal in the uplink and the telemetry signal in the downlink. Various ranging sequences are taken into consideration and tested prior to final international adoption. The reciprocal interference among telemetry, telecommand, and ranging signals is evaluated in terms of bit error rate and ranging phase acquisition time
Serological survey for selected viral pathogens in brown bears from Italy
No full textBlood samples were collected from six captive bears and nine free-ranging Marsican brown bears (Ursus arctos marsicanus) in the Abruzzo National Park, Italy, between 1991 and 1995. Sera were tested for evidence of exposure to canine distemper virus (CDV), canine adenovirus type 2, canine coronavirus, and canine parvovirus type 2 (CPV-2). Serologic evidence of CDV and CPV-2 exposure was found in both captive and free-ranging bears. This may be the first report of CDV exposure in free-ranging bears.[...
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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