Ercan Topuz

Principles of integrated maritime surveillance systems

Preface. Acknowledgements. 1. Introduction. 2. Maritime Surveillance Applications. 3. Maritime Environment. 4. Sensors. 5. Sensor Platforms. 6. Principles of Automatic Target Recognition in a Maritime Environment. 7. Multisensor Data Fusion. 8. Communications Systems and Data Links. 9. Simulation of Maritime Surveillance Systems. 10. New Technologies, New Functions and Solutions. 11. Cost Analysis and Implementation Planning. Index.

Modeling and Simulation Tools for Emerging Telecommunication Networks

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Reliability and Availability Basics

Basics of reliability analysis are reviewed, and elements of topological reliability models are introduced. The effectiveness of preventive maintenance in improving system service-life performance, and that of redundancy in improving system-availability performance, are discussed.

Some Characteristics of Radiation From Linearly Phased/Sequentially Excited Periodic, Rectangular Arrays of Dipoles

Floquet wave and element-by-element summation representations are implemented to investigate the radiation from a periodic, rectangular array of linearly phased/sequentially pulsed dipoles in the frequency- and time-domains. A synthetic aperture type formulation for Floquet wave representation and an asymptotic formulation for the element-by-element summation representation are developed. Numerical results are presented to demonstrate the efficiency of the Floquet wave representation in terms of radiating, non-radiating and diffracted wave constituents and then validated via comparison with direct summation over the contributions of individual dipole radiations.

Time-Domain Investigations of Periodic Rectangular Dipole Arrays

Radiation from large arrays of finite one-and two-dimensional periodic, linearly phased, electric current dipoles is investigated. The classical element-by-element summation representation is modified to speed up the convergence. A synthetic aperture type approach is applied in the Floquet domain for modeling finite arrays. Numerical results for the radiated field are presented both in frequency and also in time domains.

Determination of burst drop probability in optical burst switched networks with Monte Carlo simulation

Optical burst switching (OBS) has recently been subject to increased interest since, given the state-of-the-art technology, it appears to be the most attractive technique for meeting transparency and bandwidth on demand requirements in high capacity, backbone optical networks. In this study a Monte Carlo based model is developed for calculating the overall burst drop probability performance of JIT protocol in OBS networks under fairly realistic conditions. Our simulation results indicate that the advantages gained in using OBS become more pronounced as the channel occupation ratio decreases.

Photonic Band Gaps of the Honeycomb Photonic Crystal Fiber Structure

In this study, full wave solutions are presented for a photonic crystal fiber structure with cylindrical air holes of circular cross-section in a honeycomb type periodic arrangement on silica substrate, and a low index core region obtained by introducing an extra air hole. Numerical results are presented for the variations of the band structure and modal fields which are obtained via plane wave and localized basis function expansion techniques, respectively.

Visualisations of wave dynamics in wedge-waveguides via Matlab-based propagation packages

This presentation is intended to tutorially enhance the utility and understanding of the analytical and numerical representations for the wave propagation problem inside a wedge-waveguide with both non-penetrable and penetrable boundaries; through visualizations of the dynamical interaction between the various wave species, implemented through educational Matlab packages. The first package has been prepared for the exploration of line-source-excited wave fields in terms of normal, adiabatic and intrinsic mode solutions. The second package belongs to one-way split-step parabolic equation modeling for the visualizations of modal leakage

A Monte Carlo Type Simulation Approach For Performance Evaluation In Optical Burst Switched Networks

Burst switching appears to be the most promising technique for meeting transperancy and bandwidth-on-demand requirements in wavelength division multiplexed, ultra high capacity, backbone optical networks. Modeling and simulation of such networks present challenges which are rather difficult, and in extreme cases impossible to meet using analytical or discrete event approaches. This is due to the absence of sufficiently accurate models for the former, and due to the required exessively large computational resources for the latter approach. In this paper a different modeling approach is presented, which under the assumptions of stationarity of distributions allows for implementation of Monte Carlo sampling for calculating overall burst loss probability performance of JIT protocol in optical burst switched networks. Simulation results are presented for NSFNet and Pan-European Network, which demonstrate the applicability of the proposed approach.

Simulation of Maritime Surveillance Systems

This chapter is about techniques for using computers to imitate, or simulate, the operations of various kinds of real world maritime surveillance facilities and processes. The contents of the chapter is organized as follows: