The sensor tasking problem in sensor networks involves the representation of users’ tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. We analysed four approaches to task representation (TR) in sensor networks: the Open Geospatial Consortium’s Sensor Web Enablement, Goal Lattices, Semantic...

Walking in daily life places high demands on the interplay between cognitive and motor functions. A well-functioning dual-tasking ability is thus essential for walking safely. The aims were to study longitudinal changes in gait function during single- and dual-tasking over a period of two years among people with initially mild AD (n=21). Data were collected on three occasions, twelve months apa...

This paper shows how the canonical implementation [1] of the Singleton pattern does not work correctly in the presence of preemptive multi-tasking or true parallelism. To solve this problem, we present the Double-Checked Locking optimization pattern. This pattern is useful for reducing contention and synchronization overhead whenever “critical sections” of code should be executed just once. In ...

Background This study focussed on the effect of dual versus single tasking on balance, gait and cognition in veterans with mild traumatic brain injury (mTBI). We examined the correlation between these parameters, with responses to questions on community reintegration activities. Method 22 male and female veterans (aged 19-65) walked along a narrow and 6.1-meter long path, both at their self-s...

[Purpose] The purpose of the study was to investigate the postural control and cognitive performance of older adults when stepping backward with and without a concurrent cognitive task. [Subjects and Methods] Thirty young adults and twenty-eight older adults (mean age=21.3 ± 1.2 and 72.2 ± 5.7 years, respectively) were recruited. Participants were asked to step backward and then maintain a sing...

Remotely sensed images have become an important source of information for actors involved in disaster management and satellite-based emergency mapping (SEM) is increasingly used to support the response phase first hours days after a occurs. The delivery timeliness crisis key success SEM. In Copernicus Emergency Management Service (CEMS), procedure was tested during past 5 years which links Euro...

An Ada tasking kernel is implemented as a layer beneath the Linux operating system. This provides low overhead and precise control of execution timing for real-time Ada tasks, which execute within the Linux kernel address space, while allowing the Linux operating system to execute non-real-time tasks in the background. The Ada tasking kernel is derived from Yodaiken's Real-Time Linux kernel, wi...

Remote tasking encompasses different functionality, such as remote forking, multiple remote spawning, and task migration. In order to overcome the relatively high costs of these mechanisms, optimizations can be applied at various levels of the underlying operating system or application. Optimizations include concurrent message transmission, increased throughput and reduced latency at the distri...

The objective of on-line flagging in this paper is to perform an interactive assessment of geosynchronous satellites anomalies such as cross-tagging of satellites in a cluster, solar panel offset change, etc. This assessment will utilize a Bayesian belief propagation procedure and will include an automated update of the baseline signature data for the satellite, while accounting for the seasona...