abstract the concept of armouring is used to discuss the coarse surface layer in rivers. selective erosion in an alluvial channel reach for which there is no upstream sediment supply can lead to formation of a layer coarser than the under laying material. this phenomenon inhibits sediment transport from the reach.numerical modeling of armouring river bed, provides an approach to simulation of t...

determining landslide size could be a difficult and expensive task. in this research, size parameters of 142 landslides recognized in tajan river basin, northern iran, have been assessed. the dataset was prepared through the extensive field surveys and using the satellite imagery available via google earth. dependence between landslides area (a-m2), volume (v-m3), and depth (d-m) was appointed ...

Abstract: By using the concept of parameter varying (C,A)-invariant subspace and parameter varying unobservability subspace, this paper investigates the problem of fault detection and isolation in linear parameter varying (LPV) systems. The so called detection filters approach, formulated as the fundamental problem of residual generation (FPRG) for linear time invariant (LTI) systems is extende...

This paper incorporates two-sided moral hazard in an otherwise frictionless matching market for partnerships and examines how unobservability of the effort choices of the matched partners impacts the equilibrium sorting patterns. We find that the direction of this impact depends on whether unobservable effort and observable type are complements or substitutes: when they are complements (i.e.mar...

This paper develops the idea that obsolescence acts as an incentive device to provide quality for experience goods. The argument is that obsolescence affects the frequency at which consumers repurchase products and may punish producers for a lack of quality. A higher rate of obsolescence enables a firm to convince its consumers that it provides high quality. We identify a trade–off between qual...

Within the framework of a joint technical research cooperation project between Brazil and France, this paper proposes a new type of situation awareness algorithm based on the theory of graphs of pairs of plots (cf. Radar conference IEEE Washington 2010: “Tracking based on graph theory applied to pairs of plots”) using Brazilian Navy Aircraft Carrier "São Paulo" as a sensor data platform for the...

There is a class of implication-based methods that identify logic redundancy from circuit topology and without any primary input assignment. These methods are less complex than automatic test pattern generation ATPG but identify only a subset of all redundancies. This paper provides new results to enlarge this subset. Contributions are a xed-value theorem and two theorems on fanout stem unobser...

Odometer-aided visual-inertial SLAM systems typically have a good performance for navigation of wheeled platforms, while they usually suffer from degenerate cases before the first turning. In this paper, firstly we perform an observability analysis w.r.t. extrinsic parameters turning, which is complement existing results analyses. Secondly, inspired by above analyses, propose bidirectional traj...