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Articles 1 - 10 of 10
Full-Text Articles in Computer and Systems Architecture
Undergraduate Research On 5g Propagation Analysis In Naval Ship Environment, Otilia Popescu, Dimitrie Popescu, Murat Kuzlu
Undergraduate Research On 5g Propagation Analysis In Naval Ship Environment, Otilia Popescu, Dimitrie Popescu, Murat Kuzlu
Engineering Management & Systems Engineering Faculty Publications
Wireless communication systems have experienced rapid advancements over the last decade, with 5G systems becoming the regular standards and 6G systems being under development. However, the naval ship environment still requires more study due to the special indoor characteristics of the spaces below the deck, where the metal structures strongly impact the propagation characteristics, being prone to signal degradation, dead spots, and unreliable connectivity. This paper presents the research work conducted by a team of undergraduate students from Electrical and Computer Engineering (ECE) and Electrical Engineering Technology (EET) majors. The work was a partnership between Old Dominion University engineering programs …
A P2p Computing System For Overlay Networks, Grzegorz Chmaj, Krzysztof Walkowiak
A P2p Computing System For Overlay Networks, Grzegorz Chmaj, Krzysztof Walkowiak
Electrical & Computer Engineering Faculty Research
A distributed computing system is able to perform data computation and distribution of results at the same time. The input task is divided into blocks, which are then sent to system participants that offer their resources in order to perform calculations. Next, a partial result is sent back by the participants to the task manager (usually one central node). In the case when system participants want to get the final result, the central node may become overloaded, especially if many nodes request the result at the same time. In this paper we propose a novel distributed computation system, which does …
Decision Strategies For A P2p Computing System, Grzegorz Chmaj, Krzysztof Walkowiak
Decision Strategies For A P2p Computing System, Grzegorz Chmaj, Krzysztof Walkowiak
Electrical & Computer Engineering Faculty Research
Peer-to-Peer (P2P) computing (also called ‘public-resource computing’) is an effective approach to perform computation of large tasks. Currently used P2P computing systems (e.g., BOINC) are most often centrally managed, i.e., the final result of computations is created at a central node using partial results – what may be not efficient in the case when numerous participants are willing to download the final result. In this paper, we propose a novel approach to P2P computing systems. We assume that results can be delivered to all peers in a distributed way using three types of network flows: unicast, Peer-to-Peer and anycast. We …
Architecture For A Flexible And Scalable Simulation Engine, Robert C. Holcomb Jr.
Architecture For A Flexible And Scalable Simulation Engine, Robert C. Holcomb Jr.
Computational Modeling & Simulation Engineering Theses & Dissertations
Simulation is used by many different industries to gain insight on actions and decisions that may be too dangerous or costly to perform in reality. Although the use of computers to assist with modeling and simulation has been studied for quite a while, computer infrastructure, hardware, and capabilities are changing at a rapid pace. Computer software once written is difficult and costly to change, especially in order to take advantage of the advances in computer hardware. This thesis focuses on the design and implementation of a software simulation architecture that allows flexibility in the modeling conducted and scalability in the …
Software Development Approach For Discrete Simulators, Grzegorz Chmaj, Dawid Maksymilian Zydek
Software Development Approach For Discrete Simulators, Grzegorz Chmaj, Dawid Maksymilian Zydek
Electrical & Computer Engineering Faculty Research
Simulation is the most common approach to perform the problem research. Among several types of simulation, the most common way is the discrete simulation, which assumes the division of the time scale into fixed length time slots. Depending on investigated problem, simulation packages may be used or it could be necessary to design and create own simulation system. In this paper, we propose the complete pre-study scheme and the most commonly appearing implementation problems with suggested solutions. We also describe how to implement the exemplary simulator in C++.
Dynamic Routing Structure For An Rti Taking An Evolutionary Approach Towards Optimization, Matthew Ryan Davis
Dynamic Routing Structure For An Rti Taking An Evolutionary Approach Towards Optimization, Matthew Ryan Davis
Computational Modeling & Simulation Engineering Theses & Dissertations
The Runtime Infrastructure (RTI) is the common communication framework that High Level Architecture (HLA) simulations incorporate to exchange data. By abstracting the network communication layer from simulation, a common protocol for information exchange is achieved, allowing any RTI- based simulation to exchange data with any other. Such commonality can bring a limitation upon the network infrastructure, enforcing all federates to agree on the same communication policy. While this static network structure is not always the case, an optimal choice would be to adhere to the dynamic properties of a network. Static network configurations deny federates the ability to dynamically avoid …
What Should Be In A Human Behavior Representation Federation Object Model For High Level Architecture, Gurkan Haznedaroglu
What Should Be In A Human Behavior Representation Federation Object Model For High Level Architecture, Gurkan Haznedaroglu
Electrical & Computer Engineering Theses & Dissertations
Modeling and Simulation (M&S) can assist in evaluating scenarios and enhancing the performance of operational systems. Fully integrated use of MBS can enable the evaluation of the effectiveness of proposed equipment or software in realistic simulated environments and can provide an assessment of the impacts of specific equipment or capabilities on battle outcomes. Every level, from strategic planners, technology experts, operations research analysts, weapons systems designers and users, testers, maintainers, and cost analysts, has to be interactively involved to maximize the benefits of this approach. Human behavior is a very important part of the M&S process. Especially in constructive simulations, …
Programmable Process Flow Networks, Filip D. Cuckov
Programmable Process Flow Networks, Filip D. Cuckov
Electrical & Computer Engineering Theses & Dissertations
A model that introduces programmability to processes occurring in a cargo terminal simulation through the use of a process language is presented in this thesis. The model provides a means for a straight-forward definition, and redefinition of changing processes, their incorporation in the simulation architecture and efficient execution. The model was built to investigate a solution for transforming the cargo terminal simulation CPortS into a process-oriented simulation without hard-coded processes. The approach taken separates the system into an architecture and a set of processes which utilize and interact with the architecture's resources and infrastructure. The processes that take place within …
Creating Enterprise Simulations Using High Level Architecture, Anton R. Lidums
Creating Enterprise Simulations Using High Level Architecture, Anton R. Lidums
Electrical & Computer Engineering Theses & Dissertations
Despite an established need, there are two remaining roadblocks to building distributed simulations and enterprise simulation systems. First, commercial simulation packages and engineering modeling tools are not readily distributable across multiple computers and have traditionally had very little impetus for utilizing a distributable format. Second, although HLA simulations have been built and there are tools to facilitate those efforts, very little has been done or written that specifically describes a "non-standard" integration implementation in sufficient detail to make the process reusable or repeatable. This thesis introduces a proof of concept prototype that was developed to integrate simulations. The paper presents …
A Simulation Study Of A Space-Borne Optical Disk Mass Memory System, Kenny G. Chen
A Simulation Study Of A Space-Borne Optical Disk Mass Memory System, Kenny G. Chen
Electrical & Computer Engineering Theses & Dissertations
Issues concerning space-borne applications of an optical disk mass memory system (ODMMS) are investigated through computer simulation. The simulation model is developed according to a current description of the ODMMS with certain application constraints. The results are examined in terms of system modularity, multi-user data rate buffering, disk module access, and read/write file management. The conditions and requirements for future disk controller designs are indicated in the simulation results.