Browsing Articles by Title
Now showing items 613-632 of 860
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Radar imager for Mars’ subsurface experiment—RIMFAX
(2020-11-03)The Radar Imager for Mars’ Subsurface Experiment (RIMFAX) is a Ground Penetrating Radar on the Mars 2020 mission’s Perseverance rover, which is planned to land near a deltaic landform in Jezero crater. RIMFAX will add a ... -
Radar sensitivity to human heartbeats and respiration
(2015)Human heartbeats and respiration can be detected from a distance using radar. This can be used for medical applications and human being detection. It is useful to have a system independent measure of how detectable the ... -
Radio-Frequency Interference Considerations for Utility of the Galileo E6 Signal Based on Long-Term Monitoring by ARFIDAAS
(2023)The extent to which navigation signals in the E6 band may be impacted by shared spectrum allocations might be underappreciated. This paper presents top-level observations from a multi-year international radio frequency ... -
A Radon-Transform-Based Image Noise Filter - With Applications to Multibeam Bathymetry
(2015)This paper describes a linear-image-transform-based algorithm for reducing stripe noise, track line artifacts, and motion-induced errors in remote sensing data. Developed for multibeam bathymetry (MB), the method has also ... -
Range and Doppler walk in DVB-T based Passive Bistatic Radar
(2010)This paper analyzes the effects of range and Doppler walk for a Digital Video Broadcast - Terrestrial based Passive Bistatic Radar of both simulated and experimental data. Range and Doppler walk cause energy dispersal ... -
Rapid Identification of Bacillus anthracis Spores in Suspicious Powder Samples by Using Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS)
(2013)Rapid and reliable identification of Bacillus anthracis spores in suspicious powders is important to mitigate the safety risks and economic burdens associated with such incidents. The aim of this study was to develop and ... -
The Rapidly Exploring Random Tree Funnel Algorithm
(2022-03-17)This paper shows the feasibility of combining robust motion primitives generated through the Sums Of Squares programming theory with a discrete Rapidly exploring Random Tree algorithm. The generated robust motion ... -
A Reactive Collision Avoidance Algorithm for Vehicles withUnderactuated Dynamics
(2017)This paper presents a reactive collision avoidance algorithm, which avoids both static and moving obstacles by keeping a constant avoidance angle between the vehicle velocity vector and the obstacle. In particular, we ... -
Reactive Collision Avoidance for Nonholonomic Vehicles in Dynamic Environments with Obstacles of Arbitrary Shape
(2021-11-01)Over the recent years, there has been an increasing interest in autonomous systems. Consequently, the problem of avoiding static and dynamic obstacles without human interference has gained a lot of attention. Avoiding ... -
Reactive Collision Avoidance for Underactuated Surface Vehicles using the Collision Cone Concept
(2021-08)Avoiding collisions is a crucial task for autonomous systems. Many strategies for avoiding obstacles have been proposed, yet the problem of having underactuated dynamics is rarely addressed in previous studies of collision ... -
Real-time anomaly detection in hyperspectral images using multivariate normal mixture models and GPU processing
(2009)Hyperspectral imaging, which records a detailed spectrum of light arriving in each pixel, has many potential uses in remote sensing as well as other application areas. Practical applications will typically require real-time ... -
Real-time georeferencing for an airborne hyperspectral imaging system
(2011)The paper describes the georeferencing part of an airborne hyperspectral imaging system based on pushbroom scanning. Using ray-tracing methods from computer graphics and a highly efficient representation of the digital ... -
Real-time PCR and NASBA for rapid and sensitive detection of Vibrio cholerae in ballast water
(2012)Transport of ballast water is one major factor in the transmission of aquatic organisms, including pathogenic bacteria. The IMO-guidelines of the Convention for the Control and Management of Ships’ Ballast Water and ... -
Realising benefits in public IT projects: A multiple case study
(2022-12-13)Information Technology (IT) investments in the public sector are large, and it is essential that they lead to benefits for the organisations themselves and wider society. While there is evidence suggesting a positive ... -
Reciprocity and the scattering matrix of waveguide modes
(2013)The implications of the Lorentz reciprocity theorem for a scatterer connected to waveguides with arbitrary modes, including degenerate, evanescent, and complex modes, are discussed. In general it turns out that a matrix ... -
The Recruiter’s Dilemma: Signaling and Terrorist Recruitment Tactics
(2013)How do terrorists recruit? We know much about the profiles and pathways of recruits, but little about the strategies and tactics of recruiters. Such procedures matter because they help determine who joins. I highlight a ... -
The red-sky enigma over Svalbard in December 2002
(2005)On 6 December 2002, during winter darkness, an extraordinary event occurred in the sky, as viewed from Longyearbyen (78° N, 15° E), Svalbard, Norway. At 07:30 UT the southeast sky was surprisingly lit up in a deep red ... -
Redrawing borders, reshaping orders: Russia’s quest for dominance in the Black Sea region
(2021-01-04)Since Russia’s annexation of Crimea in March 2014, severe limitations have been placed on Ukraine’s coastal state rights and navigational freedoms in the Black and Azov Seas and the Kerch Strait. The "Kerch Strait clash" ... -
Reducing scalloping in synthetic aperture radar images using a composite image transform
(2015)In burst mode SAR imaging, echo intensity depends on the target's azimuth position in the antenna pattern. As a result, an amplitude modulation known as scalloping may appear, particularly in ScanSAR images of ocean ... -
Regulation of CCN1 (Cyr61) in a porcine model of intestinal ischemia/reperfusion
(2015)Intestinal ischemia is a serious condition that may lead to both local and systemic inflammatory responses. Restoration of blood supply (reperfusion) to ischemic tissues often increases the extent of the tissue injury. ...