motivated by the recent study on categorical properties of latticevalued topology, the paper considers a generalization of the notion of topological system introduced by s. vickers, providing an algebraic and a coalgebraic category of the new structures. as a result, the nature of the category   topsys   of s. vickers gets clari ed, and a metatheorem is stated, claiming that (latticevalu...

Topology-based visualization of planar turbulent flows results in visual clutter due to the presence of numerous features of very small scale. In this paper, we attack this problem with a topology simplification method for vector and tensor fields defined on irregular grids. This is the generalization of previous work dealing with structured grids. The method works for all interpolation schemes.

Topology in a network plays an important role for effective and efficient data communication. It is infect the organization of network that depicts how the communication between two nodes will take place. Wireless sensor network is a collection of tiny self-organized sensor nodes. A sensor has a characteristic of sensing small data from the environment, process it and forward it to some collect...

If the universe is finite and smaller than the distance to the surface of last scatter, then the signature of the topology of the universe is writ large on the microwave background sky. We show that the microwave background will be identified at the intersections of the surface of last scattering as seen by different “copies” of the observer. Since the surface of last scattering is a two-sphere...

Topology issues have received more and more attentions in Wireless Sensor Networks . WSN applications are normally optimized by the given underlying network topology. Topology control is an effective method to improve the energy efficiency of wireless sensor networks. Due to the severe resource limitations of the sensor nodes (e.g., small battery, limited computation capabilities, inexpensive t...

GaInP/GaAs HBT inductorless wideband amplifiers using shunt-series shunt-shunt dual-feedback topology (Kukielka topology) and shunt-series series-shunt dual-feedback topology (Meyer topology) are demonstrated in this article. Three amounts of feedback are applied on each topology. At the high-gain mode, the Kukielka/Meyer wideband amplifier achieves the small-signal power gain of 30/27 dB with ...

Recently, research on complex network theory and applications draws a lot of attention in both academy and industry. In mobile ad hoc networks (MANETs) area of research, a critical issue is to design the most effective topology for given problems. It is natural and significant to consider complex networks topology when optimising the MANET topology. Current works usually transform MANET or sens...

This study examines the topological and geographical structure of eight large Autonomous System (AS) topologies. We use a large collection of traceroutes obtained from multiple vantage points, and a set of heuristics designed to infer, from those traceroutes, the topology of individual ASs. We carefully validate some aspects of these topologies using publicly available information. Our analyses...