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It is notable that the air discharge method specified in the International Eelectrotechnical Commission (IEC) standard provides unstable testing reproducibility. In this paper, to achieve stable testing reproducibility, we proposed an alternative air discharge test method using an electrostatic discharge (ESD) generator in contact discharge mode. Measurements of air discharge currents through a fixed...
Islanded operation of HVDC sending system can reduce the influence of HVDC fault on the parallel AC system, enhance the security of the system and increase the transmission capacity. Due to relatively small system inertia and ESCR, there are difficulties of the frequency and voltage control in the islanded sending system. The conventional analysis are focuses on the process after HVDC bipolar trip...
The Smart Grid, as a current progressive new field, brings new possibilities and also new challenges. This paper deals with cyber security challenges in Smart Grid area. We provide a random number generator, which might be used for cryptographic purpose in low-power parts of Smart Grid network. The presented solution use hardware events and it is an effective solution for true random number needs...
This paper discusses a new online tool for online gamers to share networking performance results and to produce aggregate networking performance reports generated from the data reported by all users. It is necessary to improve the quality of service and make online games faster. This will help improve latency sensitive game data collection. It will help to improve gaming performance through the global...
This paper focuses on development of negative sequence relay model that is processing IEC 61850-9-2 Sampled Values. The detection of negative sequence current and fast, reliable operation of protection relay is useful for power system components. This paper describes negative sequence relay model programmed in LabView that was tested with software tools developed at Brno University of Technology....
We investigate the parameters of pseudo-random number generator based on fuzzy logic (FRNG) and select the best one. The first parameter is the "size of buffer", the second parameter is the "number of membership functions for fuzzy variables in FRNG". These parameters play essential role for the FRNG and directly influence to the randomness of the output binary sequence. We investigate...
Sampled Values transferred via process bus according to IEC 61850 are used for protection functions in substation. Nowadays a lot of researchers are dealing with their processing and using them for protection algorithms. There are some software tools that could be used for their processing. This paper is focused on package of software tools developed at Brno University of Technology and they allow...
Previous work has demonstrated that property-based testing can successfully be applied to web services. For example, it has been shown that JSON schemas can be used to automatically derive test-case generators for web forms. This paper presents a test-case generation approach for web services that takes business rule models as input for property-based testing. We parse these models to automatically...
This paper investigates the biometric data emulation and encryption for the sports wearable devices, including data generation performance with different data encryptions for a NoSQL document database. We discuss more deeply a specific topic, related to testing data generation and data encryption for the performance and stress testing of our NoSQL database.
Built-in self-repair (BISR) concept is widely utilized and proven by industry to increase the reliability of regular structures such as memory cores. The idea of using this concept in mostly irregular structures such as logic cores is quite new and represents a challenging task with many problems involved; e.g. the identification of regular parts in a logic core suitable for reconfiguration, excessive...
In the submitted paper, a modern laboratory test bench for generating unit protections testing is described. Both physical construction and principle of operation are presented. The test bench is composed of: a laboratory stand with a functional front panel, one ABB REG 316*4 relay, one set of testing devices composed of Omicron™ CMC 156 testing unit and CMS 156 amplifier, one personal computer. Three...
This is a standard for developing data related to the seismic capabilities of relays. This standardcompliments ANSI/IEEE Std 344-1975, Recommended Practices for Seismic Qualification of Class IE Equipment for Nuclear Power Generating Stations, which provides general guidelines for developingdata related to seismic qualification of equipment used in nuclear generating plants.Data must be developed...
Software Defined Networking (SDN) is the potential future backbone of all computer networking. The main advantage of SDN is that it separates the control plane from the data plane. This delegates switching/routing decisions to a controller that is connected to the switches. The connectivity of the switches and controllers can be represented as a network topology. Usually a network topology has to...
Recent developments in secure computation have led to significant improvementsin efficiency and functionality. These efforts created compilers that form thebackbone of practical secure computation research. Unfortunately, many of theartifacts that are being used to demonstrate new research for secure computationare incomplete, incorrect, or unstable, leading to demonstrably erroneousresults and inefficiencies...
This paper discusses the efficiency of statistical tests for evaluating of pseudorandom number generators. We present the method to reduce a number of false negatives for pseudorandom sequences testing. We discuss this method applicability for specific tests and provide calculations of confidence intervals based on the tests significance. Also we describe the approach based on the calculation of the...
Extracting unknown and possibly useful information from a set of examples that has desired features is crucial and important for data analysis and interpretation. Normally, a public repository has become the most used method in attempting to find a suitable domain. However, relying on the available data in the public repository has several disadvantages. In this case, an automatic problem generation...
Oral carcinogenesis, a multistep phenomenon often precedes by oral pre-cancers like leukoplakia (OLK). Differentially expressed (DE) gene analysis of microarray data followed by functional classification provides an idea of alteration of biological functions associated with disease progression. In this context, microRNA (miRNA) microarray data analysis for functional classification is still a challenge,...
Recently, grammar-based fuzzers have been proposed to automate the generation of testing data. Grammar-based fuzzers differ from traditional fuzzers because the fuzzer is provided a grammatical definition of the test objective for the system under test. A novel fuzzer, Policy Generator (PG), is introduced. PG utilizes a number of heuristic techniques to improve space coverage over existing fuzzers...
The use of biomedical sensors, be it attached or embedded inside a human body, to monitor various physiological parameters is increasing at a significant rate due to continued advances in miniaturizations and materials. Testing and verification of the algorithms used in processing the physiological parameters of concern is essential, given the sensitivity of their usage. Simulation is a technique...
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