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Ultrawideband underwater acoustic communication channels
(2013)
Traditional channel models for communications research are designed for narrowband systems. Underwater acoustic communication systems use a bandwidth that is not small compared with the center frequency of the signal and ...
Effects of Infliximab and Hydrocortisone on In Vitro Cytokine Responses after Stimulation with Lipopolysaccharide
(2013)
Background: Both glucocorticosteroids and biologic drugs such as the tumor necrosis factor (TNF)-α antagonist infliximab are used often in the treatment of rheumatoid arthritis or inflammatory bowel disease. In severe ...
Information capacity as a figure of merit for spectral imagers: the trade-off between resolution and coregistration
(2013)
The performance of spectral imagers is customarily described by several characteristics including resolution, noise, and coregistration. These must be traded off against each other in a practical imager design. This paper ...
An ATR architecture for algorithm development and testing
(2013)
A research platform with four cameras in the infrared and visible spectral domains is under development at the Norwegian Defence Research Establishment (FFI). The platform will be mounted on a high-speed jet aircraft and ...
Intracavity molecular spectroscopy in the mid-IR using ultra-broadband optical parametric oscillator
(2013)
We have performed intracavity molecular spectroscopy of water vapor, isotopic carbon dioxide, methane, acetylene, carbon monoxide, formaldehyde and other gases using broadband mid-IR sync-pumped OPO sources (PPLN-based OPO ...
High-pulse-energy, linear optical parametric oscillator with narrow and symmetrical far field
(2013)
A new method to obtain a narrow and symmetrical far field from a high-pulse-energy optical parametric oscillator (OPO) with a linear resonator has been tested. The OPO employs two identical nonlinear crystals that are cut ...
Improved estimation of oceanographic climatology using empirical orthogonal functions and clustering
(2013)
Vertical profiles of temperature, salinity, and sound speed velocity are used in numerous applications where accurate vertical profiles are crucial. Conventional climatological representations of vertical oceanographic ...
Three-dimensional multiple-source focalization in an uncertain ocean environment
(2013)
This letter develops a Bayesian focalization approach for three-dimensional localization of an unknown number of sources in shallow water with uncertain environmental properties. The algorithm minimizes the Bayesian ...
Propagation and scattering effects in underwater acoustic communication channels
(2013)
Systematic measurements were performed to characterize shallow-water acoustic propagation channels for applications in the field of underwater communications. The survey was conducted in northern Europe and covers the ...
Long-range tropospheric transport of uranium and plutonium weapons fallout from Semipalatinsk nuclear test site to Norway
(2013)
A combination of state-of-the-art isotopic fingerprinting techniques and atmospheric transport modelling using real-time historical meteorological data has been used to demonstrate direct tropospheric transport of radioactive ...