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Determining farm surface porcine reproductive and respiratory syndrome virus (PRRSV) contamination through viability RT-qPCR. [PDF]
PLoS OneMelini CM +3 more
europepmc +1 more source
Copper and manganese levels are associated with infectious abortions, stillbirths, and early neonatal deaths in upper Midwest beef cattle herds. [PDF]
J Am Vet Med AssocMitchell H +7 more
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Commercial aviation VDL choices
IEEE Aerospace and Electronic Systems Magazine, 2003The purpose of this study was to analyze digital data link communications technologies in a line-of-sight environment. Because there is a global debate over selecting the next generation VHF data link (VDL) technology, this paper evaluates each of them for the terminal and enroute airspace only.
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Formal Semantics of Programming Languages: VDL
IBM Journal of Research and Development, 1981The history of ideas that led to the first formalization of the syntax and semantics of PL/I is sketched. The definition method and notation are known as the Vienna Definition Language (VDL). The paper examines the relationship between VDL and both denotational semantics and the axiomatic approach to programming language definition.
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VDL Mode E Receiver Performance Measurments
IEEE Aerospace and Electronic Systems Magazine, 2006VDL Mode E is a digital communications system proposed as a worldwide standard for replacement of the existing analog AM voice system used for VHF aeronautical communications. It provides a needed increase in voice channel capacity as well as offering a digital data link for CPDLC with the high integrity and low latency needed for time-critical ATC ...
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Estimation of VDL mode 2 with hidden transmitters
2009 IEEE Aerospace conference, 2009The VDL Mode 2 aeronautical data link uses a p-persistent Carrier Sense Multiple Access (CSMA) channel access protocol that, like all CSMA systems, is susceptible to the hidden transmitter condition. Simulations have shown that the impact of hidden transmitters in the aeronautical environment can be significant.
Steven Bretmersky, Rafael Apaza
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Development of prototype VDL Mode 2 system in Korea
2009 Integrated Communications, Navigation and Surveillance Conference, 2009The Korea Aerospace Research Institute (KARI) has been developing a prototype VDL Mode 2 system since mid of 2005. The purposes of this project are to obtain knowledge, insights and experiences of aeronautical communications trends and technologies and to prepare for future deployment of globally harmonized communication infrastructure consistent with ...
Joong-Won Bae +4 more
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