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Papers by Lubomír Ivánek
2017 18th International Scientific Conference on Electric Power Engineering (EPE)
This paper deals with estimates of capacity between rails of the traction tracks. The determinati... more This paper deals with estimates of capacity between rails of the traction tracks. The determination of capacity was performed using software for numerical processing of electromagnetic fields: QField, COMSOL, together with the ATP program. The model comprised a traction section with the track clearance of 10 cm above the ground. The result then provides the estimate of capacity changes between rails together with changes in frequency, ground clearance, earth conductivity etc.
Advances in Electrical and Electronic Engineering, 2018
This paper deals with the change of the ratio of the open circuit impedance to short-circuit impe... more This paper deals with the change of the ratio of the open circuit impedance to short-circuit impedance of the electric traction depending on the distance of the traction vehicle from the beginning of the section. This ratio is calculated in order to estimate the traction vehicle speed and the distance at which the track occupancy can be indicated. Therefore, the impedance moduli and the impedance phases of the open track circuit and the impedance of the occupied track (short-circuit impedance) is compared at different short-circuit distances. The impedances ratio varies with changing weather conditions. It is different in dry weather than in the rain. Therefore, in practical use, the track occupancy indicator must always be updated and the ratio must always be recalculated for the new situation. In this paper, the impedances ratio is calculated for specific parameters measured in the section of the track in Orlova. The distance between a reference point (place of short circuit rails) from a measuring point is for the impedance module ratio of F =10 about 218 m.
Temporomandibular Joint Pathology - Current Approaches and Understanding, Feb 28, 2018
The temporomandibular joint (TMJ) forms a complex functional system with teeth, bones, connected ... more The temporomandibular joint (TMJ) forms a complex functional system with teeth, bones, connected muscles and ligaments. Any discomfort in any of these structures directly affects the joint. The complaints are mostly pain, malocclusion and swelling. Temporomandibular joint tumors are very uncommon but show symptoms similar to intra-articular disorders that make up most of these disorders. The most common TMJspecific benign tumors are classified after a brief literature review. Our classification also includes the osteoma of the TMJ, other than World Health Organization's (WHO) classification of soft tissue and bone tumors. This benign tumor was also included in the classification because of its higher frequency in the literature. The treatment of these neoplasms may be conservative or radical surgery.
Materials Technology, 2014
Proceedings of the 2014 15th International Scientific Conference on Electric Power Engineering (EPE), 2014
ABSTRACT
Journal of Physics and Chemistry of Solids, 2012
Synthetic Metals, 2013
New approach of chemical bath deposition combined with drying of freshly polymerized PANI films i... more New approach of chemical bath deposition combined with drying of freshly polymerized PANI films in high voltage (HV) static electrical field 0.6-2.7 kV/cm has been applied in present work. AFM and SEM microscopy revealed the significant changes of structure and morphology of PANI films, however the most important result of HV treatment was the strong increase of conductivity of PANI films from 88 S/m for the reference sample untreated in HV field up to 374 S/m for samples dried in the electric field (1.0 kV/cm). The dependence of PANI conductivity on the intensity of HV field showed the maximum conductivity for 1.0 kV/cm. Effects of corona discharge observed for HV field intensity above 2.0 kV/cm on the samples are also presented. Results showed the possibility to change the nanostructure and morphology using HV electrical field.
2017 18th International Scientific Conference on Electric Power Engineering (EPE)
This paper deals with estimates of capacity between rails of the traction tracks. The determinati... more This paper deals with estimates of capacity between rails of the traction tracks. The determination of capacity was performed using software for numerical processing of electromagnetic fields: QField, COMSOL, together with the ATP program. The model comprised a traction section with the track clearance of 10 cm above the ground. The result then provides the estimate of capacity changes between rails together with changes in frequency, ground clearance, earth conductivity etc.
Advances in Electrical and Electronic Engineering, 2018
This paper deals with the change of the ratio of the open circuit impedance to short-circuit impe... more This paper deals with the change of the ratio of the open circuit impedance to short-circuit impedance of the electric traction depending on the distance of the traction vehicle from the beginning of the section. This ratio is calculated in order to estimate the traction vehicle speed and the distance at which the track occupancy can be indicated. Therefore, the impedance moduli and the impedance phases of the open track circuit and the impedance of the occupied track (short-circuit impedance) is compared at different short-circuit distances. The impedances ratio varies with changing weather conditions. It is different in dry weather than in the rain. Therefore, in practical use, the track occupancy indicator must always be updated and the ratio must always be recalculated for the new situation. In this paper, the impedances ratio is calculated for specific parameters measured in the section of the track in Orlova. The distance between a reference point (place of short circuit rails) from a measuring point is for the impedance module ratio of F =10 about 218 m.
Temporomandibular Joint Pathology - Current Approaches and Understanding, Feb 28, 2018
The temporomandibular joint (TMJ) forms a complex functional system with teeth, bones, connected ... more The temporomandibular joint (TMJ) forms a complex functional system with teeth, bones, connected muscles and ligaments. Any discomfort in any of these structures directly affects the joint. The complaints are mostly pain, malocclusion and swelling. Temporomandibular joint tumors are very uncommon but show symptoms similar to intra-articular disorders that make up most of these disorders. The most common TMJspecific benign tumors are classified after a brief literature review. Our classification also includes the osteoma of the TMJ, other than World Health Organization's (WHO) classification of soft tissue and bone tumors. This benign tumor was also included in the classification because of its higher frequency in the literature. The treatment of these neoplasms may be conservative or radical surgery.
Materials Technology, 2014
Proceedings of the 2014 15th International Scientific Conference on Electric Power Engineering (EPE), 2014
ABSTRACT
Journal of Physics and Chemistry of Solids, 2012
Synthetic Metals, 2013
New approach of chemical bath deposition combined with drying of freshly polymerized PANI films i... more New approach of chemical bath deposition combined with drying of freshly polymerized PANI films in high voltage (HV) static electrical field 0.6-2.7 kV/cm has been applied in present work. AFM and SEM microscopy revealed the significant changes of structure and morphology of PANI films, however the most important result of HV treatment was the strong increase of conductivity of PANI films from 88 S/m for the reference sample untreated in HV field up to 374 S/m for samples dried in the electric field (1.0 kV/cm). The dependence of PANI conductivity on the intensity of HV field showed the maximum conductivity for 1.0 kV/cm. Effects of corona discharge observed for HV field intensity above 2.0 kV/cm on the samples are also presented. Results showed the possibility to change the nanostructure and morphology using HV electrical field.