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In multi-controller software-defined networking (SDN) environments, a flow whose path includes switches that are managed by different controllers experiences increased flow setup latency, which is critical for delay-sensitive applications. To address the issue, we propose an optimal controller assignment scheme that minimizes the average flow setup latency while limiting load imbalance between controllers...
This paper deals with the simulation and modelling of a Quadruple-Tank interacting system using various controllers. Quadruple-Tank is a one kind of MIMO (Multiple Input Multiple Output) system. It is not possible to determine all the parameters used in Multi variable systems. The major issues in a multivariable process are that loop interaction can arise and causes difficulty in design of feedback...
Recently, Slideshow presentations such as research talking, demonstrations and lectures are performed heavily. On the other hand, handwriting ones are rarely performed. However, handwriting still have advantages and slideshow also have limitations. In this paper, we investigated merits and demerits of slideshow and handwriting lectures and proposed new oral presentation method that has both merits...
This paper deals with the tracing algorithm of multi-agent system. The organized system does not impose requirements to high-speed computers nor limit the number of PCs. A necessary condition is the existence of links between PCs for data transfer. The organized distributed computing system has high availability, flexibility, safety and coordination of computational processes using a decentralized...
This paper is devoted to extension of the mathematical theory of A-trails and OE-trails for planar graphs. These types of trails imply constructing such trails avoiding intersection of not-passed edges with passed cycles and ensuring absence of intersected transitions at each graph vertex. In terms of cutting process, a planar graph is to be the cutting plan; the process of constructing such a trail...
Connection setup in software-defined networks (SDN) requires considerable amounts of processing, communication, and memory resources. Attackers can target SDN controllers with simple attacks to cause denial of service. We proposed a defense mechanism based on a proof-of-work protocol. The key characteristics of this protocol, namely its one-way operation, its requirement for freshness in proofs of...
One of the most important segments of the university education process management seems to be the student knowledge verification as well as support of the monitoring and assessment of the quality of educational programs and related processes. The organization of the examination tests, as well as, the process and methods of student knowledge verification can take a lot of time. This paper elaborates...
Cyber-Physical Systems (CPS) are yielding novel problems and solutions for security researchers. CPSs connect computerized controllers and human supervisors with physical systems used in the energy, transportation, water, manufacturing, and other sectors. Recent attacks against CPS have prompted unprecedented investigation into new threats and mitigations against CPSs. There are motivating examples...
The results of model experiments to improve load balancing in distributed computing systems are described. A control scheme of processing requests from the terminal devices, providing effective dynamic horizontal scaling of computing power at peak loads, is offered.
This paper proposes an advanced industrial controller prepared for hazardous industrial environments, namely natural gas odorisation. Its design and conception is focused on robustness and reliability, with high flexibility to allow local and remote monitoring and control. Instead of a centralized approach, where the computational load relies on a unique processor, we propose a distributed architecture,...
Military computers have been widely used for Defense System Technologies projects during the last decade in ASELSAN, the leading defense industry company of Turkey. A military computer design is reused for new projects as long as it meets the requirements, but as processor technology evolves and different project requirements arise, the need for a new design becomes inevitable.
Control systems are lectured in various engineering fields from chemical engineering to electrical engineering. Control systems training become more efficient when the training activities are supported by experimental studies. During the experimental studies, observing control process and analyzing data captured from the process in a computer provide a significant contribution to education. This paper...
Based on the feature of the operating system course and the practice of teaching, the paper studies the existing problems in the teaching process. We propose improvements on four aspects: update teaching contents, improve teaching methods, strengthen practical teaching and reform the manner of examination. With the help of these improvements, the teaching practice shows that students' learning interest...
We are experimentally conducting a fine-grain comparative analysis of two different methods of producing pre-recorded lectures versus a traditional live lecture. The two different pre-recorded lecture production methods do not require assistance from university staff members and therefore represent a low-cost approach. The first method is generating narrated slides using PowerPoint during a live lecture...
This paper outlines issues of designing environments for real-time dynamic displaying of vector object-oriented 2D open-text formatted schemes with large number of rendered objects. Graphical objects and their dynamic behaviour are treated as entities with mutable structure — string-indexed containers. The article emphasizes significance of container elements rapid lookup by given key for application...
Modern avionics systems benefit a lot from integration which in return increases the system complexity and safety problems. The hazards existed in IMA have been considered from the prospects of resources allocation/ scheduling while the resource process integration is ignored. The existing analysis methods, proposed by the ARP4761, cannot analyze the data interaction problems among functions. The...
Packaging technology can be of strategic importance to a company, as it can be a key to competitive advantage in the modern food industry. A multihead weighing process is a packaging process based on the sum of weights from several individual hoppers. The final quality of the packaged product in a modern automated food packing system should fulfill mo objectives —the quality of the packaging process...
This paper puts forward the basic thought of designing cluster monitoring system. Firstly, the daemon running on each server node collect the specific monitoring information and then send processed information to cluster control and processing module. Secondly, the cluster control and processing module receives the processed data, then the data is made some corresponding processing and sent to the...
In this paper, nature inspired firefly algorithm has been used for designing of controllers for set-point response and stability purpose. Using firefly algorithm, we have tuned the parameters of above two controllers. A performance criteria integral square error (ISE) is optimized using firefly optimization technique. For the optimum value of ISE, controller parameters are selected. Routh Stability...
In this short paper, we present a Software-Defined Radio testbed for multi-node simulations. This testbed was created with the goals of providing repeatable simulations, while reducing development time of SDR implementations. To provide an accessible development environment, the testbed is primarily based in the MATLAB language.
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