The Internet’s layered architecture and organizational structure give rise to a number of different topologies, with the lower layers defining more physical and the higher layers more virtual/logical types of connectivity structures. These structures are very different, and successful Internet topology modeling requires annotating the nodes and edges of the corresponding graphs with information...

Let F = Kn, . . . ,K0 = Fq be an n-dimensional local field. We use the notation of section 1. In this section we describe properties of certain quotients K top(F ) of the Milnor K -groups of F by using in particular topological considerations. This is an updated and simplified summary of relevant results in [F1–F5]. Subsection 6.1 recalls wellknown results on K -groups of classical local fields...

Combinatorial vector bundles, or matroid bundles, are a combinatorial analog to real vector bundles. Combinatorial objects called oriented matroids play the role of real vector spaces. This combinatorial analogy is remarkably strong, and has led to combinatorial results in topology and bundle-theoretic proofs in combinatorics. This paper surveys recent results on matroid bundles, and describes ...

Topology construction and topology maintenance are significant sub-problems of topology control. Spanning tree based algorithms for topology control are basically transmission range based type construction algorithms. The construction of an effective backbone, however, is indirectly related to the placement of nodes. Also, the dependence of network reliability on the communication path undertak...

Due to the rapid development of the IOT, more and more devices in the network need to be connected to the IOT. Device management and device auto-discovery has become increasingly important. Network topology is a way to describe the logical or physical connections between network devices, and it is extremely necessary for the configuration management, even for the entire network management. Beca...

A newly developed ‘integrated services digital network’ (ISDN) splitter with bandstop (BS) topology is presented and compared to an actual ISDN splitter with a traditional lowpass (LP) topology. The LP-to-BS topology change reduced the amount of filter stages: a LP ISDN splitter requires an 8th order elliptic-like filter in order to be compliant to the standard ‘TS 101 952-1-4 V1.1.1’ [1] of th...

Although random cell complexes occur throughout the physical sciences, there does not appear to be a standard way to quantify their statistical similarities and differences. The various proposals in the literature are usually motivated by the analysis of particular physical systems and do not necessarily apply to general situations. The central concepts in this paper-the swatch and the cloth-pr...

Through the use of configurable wavelength-division-multiplexing (WDM) technology including tunable optical transceivers and frequency selective switches, next-generation WDM networks will allow multiple virtual topologies to be dynamically established on a given physical topology. For node port networks, we determine the number of wavelengths required to support all possible virtual topologies...

-Mobile Ad Hoc Networks are for many practical scenarios in the real world as it does not need any pre-established infrastructure. Nodes in the MANET are resource constrained. Communications over network consume energy resources of the network gradually. Therefore it is essential to have mechanisms that consume fewer resources over network. Cooperative communication is the strategy that can imp...

1. Abstract The limitation associated with the low optical absorption remains to be the main technical barrier that constrains the efficiency of thin-film solar cells in energy conversion. Effective design of light-trapping structure is thus critical to increase light absorption in thin-film cells. However, light trapping in thin-film solar cell is a highly complex physical phenomenon governed ...