Swedish Defence Research Agency

About: Swedish Defence Research Agency is a government organization based out in Stockholm, Sweden. It is known for research contribution in the topics: Radar & Laser. The organization has 1413 authors who have published 2731 publications receiving 56083 citations. The organization is also known as: Totalförsvarets forskningsinstitut.

Globe-Trotting Aedes aegypti and Aedes albopictus: Risk Factors for Arbovirus Pandemics

Abstract: Introduction: Two species of Aedes (Ae.) mosquitoes (Ae. aegypti and Ae. albopictus) are primary vectors for emerging arboviruses that are a significant threat to public health and economic burden ...

Change detection for low-frequency SAR ground surveillance

Abstract: Change detection using ultra-wideband synthetic aperture radar (SAR) images in the low end of the VHF band is shown to provide excellent performance for detection of vehicle-sized objects in forest concealment. Two different change detection algorithms are discussed and their performance evaluated. The two algorithms are based on similar statistical hypothesis testing, but differ in that one operates on complex (coherent change detection) whereas the other uses magnitude (incoherent change detection) image data. Algorithm evaluation is performed using radar data acquired with the airborne CARABAS-II SAR in northern Sweden. The data were collected during a change detection experiment with concealed vehicles in boreal forests (stand volume ca. 100 m/sup 3//ha). Results show that coherent change detection gives slightly better performance using full spatial resolution of the images, whereas the incoherent change detection gives better performance when spatial averaging (2/spl times/2 resolution cells) is included. A comparison with detecting vehicles using only single-pass images shows an increase of false alarms of one to two orders of magnitude at the same probability of detection.

A Survey of Industrial Control System Testbeds

Abstract: Conducting security tests such as vulnerability discovery within Industrial Control Systems (ICS) help reduce their vulnerability to cyber attacks. Unfortunately, the extreme availability requirements on ICS in operation make it difficult to conduct security tests in practice. For this reason, researchers and practitioners turn to testbeds that mimic real ICS. This study surveys ICS testbeds that have been proposed for scientific research. A total of 30 testbeds are identified. Most of these aim to facilitate vulnerability analysis, education and tests of defense mechanisms. Testbed components are typically implemented as simulation models. Testbed fidelity is rarely addressed, and at best briefly discussed.

Resilience in Everyday Operations A Framework for Analyzing Adaptations in High-Risk Work

Abstract: Managing complexity and uncertainty in high risk, socio-technical, systems requires people to continuously adapt. Designing resilient systems that support adaptive behaviour requires a deepened und ...