Institute of Innovative Technologies

Katowice, Poland

Institute of Innovative Technologies

Katowice, Poland
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Wrobel L.,Silesian University of Technology | Gudys A.,Silesian University of Technology | Sikora M.,Institute of Innovative Technologies
BMC Bioinformatics | Year: 2017

Background: Survival analysis is an important element of reasoning from data. Applied in a number of fields, it has become particularly useful in medicine to estimate the survival rate of patients on the basis of their condition, examination results, and undergoing treatment. The recent developments in the next generation sequencing open new opportunities in survival study as they allow vast amount of genome-, transcriptome-, and proteome-related features to be investigated. These include single nucleotide and structural variants, expressions of genes and microRNAs, DNA methylation, and many others. Results: We present LR-Rules, a new algorithm for rule induction from survival data. It works according to the separate-and-conquer heuristics with a use of log-rank test for establishing rule body. Extensive experiments show LR-Rules to generate models of superior accuracy and comprehensibility. The detailed analysis of rules rendered by the presented algorithm on four medical datasets concerning leukemia as well as breast, lung, and thyroid cancers, reveals the ability to discover true relations between attributes and patients' survival rate. Two of the case studies incorporate features obtained with a use of high throughput technologies showing the usability of the algorithm in the analysis of bioinformatics data. Conclusions: LR-Rules is a viable alternative to existing approaches to survival analysis, particularly when the interpretability of a resulting model is crucial. Presented algorithm may be especially useful when applied on the genomic and proteomic data as it may contribute to the better understanding of the background of diseases and support their treatments. © 2017 The Author(s).


Habrych M.,Wroclaw University of Technology | Miedzinski B.,Institute of Innovative Technologies | Wang X.,China Agricultural University
Elektronika ir Elektrotechnika | Year: 2016

Paper presents and discusses results of analysis and research on the possibility of use of the Hall sensor as measuring element in directional ground fault protection. The considerations have been carried out for the new balance transformer structure with magnetic shielding. Its applicability has been confirmed by tests under real ground faults in MV networks of 6 kV and 20 kV with no-effective earthing. On the basis of the investigated results appropriate practical conclusions have been formulated.


Polnik B.,Institute of Mining Technology KOMAG | Budzynski Z.,Institute of Mining Technology KOMAG | Miedzinski B.,Institute of Innovative Technologies
Elektronika ir Elektrotechnika | Year: 2014

The paper discusses the advantages and disadvantages of existing mining locomotive propulsion systems used in the Polish underground mines. The method to design a new propulsion system with recuperation of energy is presented. Conclusions and recommendations for necessity of controlling the volume of recuperated energy closely correlated with amount of electrolytic gas emissions are given.


Wosik J.,Institute of Innovative Technologies | Kozlowski A.,Institute of Innovative Technologies | Habrych M.,Wroclaw University of Technology | Kalus M.,Institute of Innovative Technologies | Miedzinski B.,Institute of Innovative Technologies
Elektronika ir Elektrotechnika | Year: 2016

The paper analyses and examines the efficiency of non-linear reactive power compensation when use the active power filter controlled by an algorithm based on the theory of CPC. The developed physical model of 3-phase active filter has been presented and results of its performance in the system so the linear load and nonlinear RL type are discussed. Particular attention was put on its operation in transient conditions. Based on both simulation and investigation results appropriate practical conclusions are formulated.


Habrych M.,Wroclaw University of Technology | Wisniewski G.,Wroclaw University of Technology | Miedzinski B.,Institute of Innovative Technologies | Wosik J.,Institute of Innovative Technologies | Kozlowski A.,Institute of Innovative Technologies
Proceedings - 2014 International Conference on Information Science, Electronics and Electrical Engineering, ISEEE 2014 | Year: 2014

The paper presents the investigated results of performance of power transformers when used for converters supply of DC drive of hosting machines. Particular attention was paid on the power loss due to deformed current and voltage waveforms. The active and reactive power losses were compared for the newly employed transformer to this working more that 16 years. On the basis of the measurements the conclusions and recommendations for use in practice are formulated. © 2014 IEEE.


Wojtas P.,Institute of Innovative Technologies | Kozlowski A.,Institute of Innovative Technologies | Miedzinski B.,Institute of Innovative Technologies | Wosik J.,Institute of Innovative Technologies
Proceedings of the 5th International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2014 | Year: 2014

Paper presents and discusses investigated results of performance of selected low voltage vacuum interrupters in which the multicomponent multilayer condensed contact material based on Cu-W compositions was employed. On the basis of the switching test results followed by respective inspections of the contacts surface and investigations of the microanalysis as well as material morphology the conclusions on possibility of application of such the material composition for LV vacuum interrupters in practice are formulated.


Miedzinski B.,Wroclaw University of Technology | Wisniewski G.,Wroclaw University of Technology | Grechanyuk N.I.,Scientific and Producing Company Eltechmash | Grodzinski A.,Polish Tele and Radio Research Institute | Kozlowski A.,Institute of Innovative Technologies
Przeglad Elektrotechniczny | Year: 2010

Paper presents and discusses investigated results of performance of selected low voltage vacuum interrupters in which the multicomponent multilayer condensed contact material based on Cu-W compositions was used. On the basis of the switching test results followed by respective inspections of the contacts surface and investigations of the microanalysis as well as material morphology the conclusions on possibility of application of such the material composition for LV vacuum interrupters in practice are formulated.

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