Hard real-time systems are those that are specified in terms of strong timing constraints. They are often involved in critical activities, where human lives may sometimes be at stake. These characteristics emphasise the need for making the services provided by this kind of system fault-tolerant. However, doing so is not simple. It involves implementing redundancy into the system so that if a sy...

Parallel manipulators feature relatively high payload and accuracy capabilities compared to their serial counterparts. However, they suffer from small workspace and low maneuverability. Kinematic redundancy for parallel manipulators can improve both of these characteristics. This paper presents a family of new kinematically redundant planar parallel manipulators with six actuated-joint degrees ...

∗ Corresponding author, Phone: (716) 645-1430, Fax: (716) 645-3668, Email: [email protected]. ABSTRACT Cable-actuated parallel manipulators combine benefits of large workspaces, significant payload capacities and high stiffness by virtue of the cable actuation. However, redundant/surplus cables are required to overcome the unidirectional nature of forces exertable by cables. This leads to ...

Sparse arrays can resolve significantly more scatterers or sources than sensor by utilizing the co-array - a virtual array structure consisting of pairwise differences sums positions. Although several sparse configurations have been developed for passive sensing applications, far fewer active designs exist. In sensing, sum is typically relevant difference co-array, especially when are fully coh...

Redundancy is the traditional technique used to increase system reliability. With modern technology, in addition to being used as temporal redundancy, slack time can also be used by energy management schemes to scale down system processing speed and supply voltage to save energy. In this paper, we consider a system that consists of multiple servers for providing reliable service. Assuming that ...

Studies on the ecology of animal memory have focused on the benefits of memory while implicitly assuming that there are costs as well. Here I discuss probable costs of memory by relying on knowledge from molecular biology and physiology, which indicates that the maintenance of accurate information in animals is an active and costly process of maintenance and repair. Redundancy probably plays a ...

Automatic summarization is an active research area in natural language processing. This paper has proposed a special method that produces text summary by detecting thematic areas in Chinese document. The specificity of the method is that the produced summary can both cover many different themes and reduce its redundancy obviously at the same time. In this method, the detection of latent themati...