A compact fully integrated wideband six-port device composed of a suspended stripline Wilkinson power divider and three bias stripline of 3-dB quadrature directional couplers is presented. In order to integrate a six-port circuit, a multilayer circuit structure has been adopted by the via hole interconnection at the output port of the divider. The 3-dB quadrature directional coupler is composed...

A novel approach for scalable length Fast Fourier Transform (FFT) in single Processing Element (single PE) architecture has been developed. Scalable length FFT design meets the different lengths requirement of FFT operation in OFDM system [1]. An efficient mechanism that named Interleaved Rotated Data Allocation (IRDA) to replace multiple-port memory with single-port memory has also been propos...

Introduction Support of RSTP in Catalyst Switches New Port States and Port Roles Port States Port Roles New BPDU Format Full View of the Cisco BPDU, IEEE BPDU, and BPDU Diagrams New BPDU Handling BPDU are Sent Every Hello-Time Faster Aging of Information Accepts Inferior BPDUs Rapid Transition to Forwarding State Edge Ports Link Type Convergence with 802.1D Convergence with 802.1w Proposal/Agre...

It is shown that by use of the Kalman-decomposition an uncontrollable and/or unobservable port-Hamiltonian system is reduced to a controllable/observable system that inherits a port-Hamiltonian structure. Energy and co-energy variable representations for port-Hamiltonian systems are discussed and the reduction procedures are used for both representations. For a general portHamiltonian system in...

The multi-port network model is a simpler tool to analyze microstrip antennas on thinner substrates. While analyzing modified shaped microstrip antennas, the multi-port network model consists of larger number of segments which increases the complexity of the model. In this paper, first multi-port network models of multi-band and compact modified rectangular microstrip antennas are discussed. Fu...

We present attributed hierarchical port graphs (AHP) as an extension of port graphs that aims at facilitating the design of modular port graph models for complex systems. AHP consist of a number of interconnected layers, where each layer defines a port graph whose nodes may link to layers further down the hierarchy; attributes are used to store user-defined data as well as visualisation and run...

Department of Educational Psychology, Guidance and Counselling, Rivers State University of Education, P. M. B. 5047. Port Harcourt, Nigeria. University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria This study deals with the incidence of Marasmic-kwashiorkor among children in Port Harcourt from the period 1994-1997. The study was undertaken at the University of Port Harcourt Teachin...

This paper researches the role of port authorities in governance, and Port Community System implementation. The authors provide theoretical frameworks seaports, authorities, Systems. literature review was carried out using Web Science database additional relevant sources. concluded that although different governance models exist (regarding type authority), there is no evidence as to which model...

Nowadays competition between port container terminals, especially between geographically close ones, is rapidly increasing. How to improve the competitiveness of port container terminals is, therefore, an immediate challenge, with which port operators are confronted. In terms of port competitiveness, the makespan of a container vessel, which is the latest completion time among all handling task...

In recent work a class of quasi port Hamiltonian system expressing the first and second principle of thermodynamics as a structural property has been defined: Irreversible port-Hamiltonian system. These systems are very much like port-Hamiltonian systems but differ in that their structure matrices are modulated by a non-linear function that precisely expresses the irreversibility of the system....