One of the significant requirements for testing a software implementation of an inter-AS DDoS countermeasure is to measure the performance of the implementation in a large scale topology with typical DDoS tools and traffic. Ideally, an emulated inter-AS topology with same scale of the real Internet will provide similar characteristics of the real Internet if the same number of physical servers ...

We consider the problem of designing a logical optical network topology for a given physical topology (or fiber layout) and a given traffic demand matrix between the end-users. Traffic between the end-users is carried in a packet-switched form and the objective of our logical topology design is to minimize the maximum congestion on the logical connections in the logical topology. The logical co...

We discuss the generalized Plateau problem in the 3+1 dimensional Schwarzschild background. This represents the physical situation, which could for instance have appeared in the early universe, where a cosmic membrane (thin domain wall) is located near a black hole. Considering stationary axially symmetric membranes, three different membrane-topologies are possible depending on the boundary con...

we consider the transitive linear maps on the operator algebra $b(x)$for a separable banach space $x$. we show if a bounded linear map is norm transitive on $b(x)$,then it must be hypercyclic with strong operator topology. also we provide a sot-transitivelinear map without being hypercyclic in the strong operator topology.

Wavelength routed optical networks allow to design a logical topology, comprising lightpaths and routers, which is overlayed on the physical topology, comprising optical fibers and optical cross-connects, by solving a Routing and Wavelength Assignment (RWA) problem. In this paper we extend the concept of lightpath to the one of Super-Lightpath, which uses a simple bit level Time Division Multip...

We have developed a 3D measuring system that uses two pan-tilt cameras to accurately measure the position of a robot’s hand. With this system, a target is set up at the tip of the robot’s hand. The pan-tilt cameras are controlled so that the midpoint of the target view is centered within the camera frames. Then, its 3D position is calculated using a triangulation method from the azimuth and ele...

One of the promising lightwave network architectures is the multihop lightwave networks based on wavelength division multiplexing (WDM). In this architecture, separate channels created by assigning different wavelengths between node pairs define the logical connectivity. This logical topology is independent of the underlying physical topology and can be adaptively changed according to the chang...

Precise network topology information is required to perform management activities such as fault detection, root cause analysis, performance monitoring, and load balancing in enterprise networks. To accomplish these management tasks, both network discovery and connectivity information are essential. This paper examines various problems with the existing topology discovery mechanisms and proposes...

The bandwidth requirements of the Internet are increasing every day and there are newer and more bandwidththirsty applications emerging on the horizon. Wavelength division multiplexing (WDM) is the next step towards leveraging the capabilities of the optical fiber, especially for wide-area backbone networks. The ability to switch a signal at intermediate nodes in a WDM network based on their wa...

The star topology is sometimes used in automotive applications to overcome wiring constrains within a car. It has to be mentioned that star topology is neither covered by ISO11898 nor by SAE J2284 therefore it is recommended to prove the feasibility of a specific topology in each case by simulations or measurements on a system setup (NXP-Semiconductors 2006). This paper considers the verificati...