2017 Communication and Information Technologies (KIT), 2017
To achieve optimal data routing along fiber optics, analytical and algorithmic methods are used. ... more To achieve optimal data routing along fiber optics, analytical and algorithmic methods are used. When some degradation factors cause temporary optical fiber impairment, optimization of data routing is an essential problem. However, the temporality is quite vague and, some network parameters are difficult to quantify. While optimizing temporarily changed route in an optical network, any cooperating solution might be helpful to re-route transmission links to avoid links overloading and data loss. This paper provides novel solution for routing optimization within simple multi-path optical network. Fuzzy logic diagnostic and control subsystem enable transmission threats evaluation within an optical network. They cooperatively generate the most appropriate dynamic decisions for current data routing. They also improve data transmission reliability. Proposed fuzzy rules are particularly discussed in the paper.
Stand-alone o-grid power supply system is a necessity for applications when electrical power dis-... more Stand-alone o-grid power supply system is a necessity for applications when electrical power dis- tribution network is inaccessible. Internal and exter- nal subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both se- curity concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft pro- tection, breaking doors or windows signaling and coun- termeasure, weather extremes alert, etc. Both inter- nal and external aspects necessarily induce additional o-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for o-grid security subsys- tem. It consists from ...
Intrinsic resistivity of any semiconductor silicon layer strongly depends on dopants and impuriti... more Intrinsic resistivity of any semiconductor silicon layer strongly depends on dopants and impurities concentrations. Structural properties, treating, coating, finishing etc. affect dynamic resistance behaviour of a given p-n junction in a wafer. It is important for massively used photovoltaics, optoelectronics, microelectronics, and other solid-state electronics. In this work, efficient, universally applicable methodology is presented to investigate silicon resistive parameters. First, the silicon band gap models are studied. Influence of electrical resistivity on resistances and complex impedance parts is investigated. Dynamic iterative numerical modelling and simulations combined with sparse-matrix experimental measurements lead to extrapolated behaviours of these resistive parameters. All parameters are investigated within acceptable practical interval up to extremals.
This article brings new approach to optical network optimization. When routing data in fast optic... more This article brings new approach to optical network optimization. When routing data in fast optical networks, defined parameters of each path are taken into account and evaluated to find optimized path for data routing. Our fuzzy logic approach implements fuzzy weighed parameterization to achieve optimal path setup in decision process, over WDM network structure. Complex path evaluation and dynamic routing using fuzzy logic can provide better results and faster decisioning for data transport in optical networks.
Advances in Electrical and Electronic Engineering, Dec 29, 2014
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power distribution network is inaccessible. Internal and external subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both security concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft protection, breaking doors or windows signaling and countermeasure, weather extremes alert, etc. Both internal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsystem. It consists from pervasive sensor circuits, fuzzy controlled diagnostics and executive actuators. Cooperated fuzzy logic diagnostic and control device enables to evaluate anticipated threats and dynamically generates the most appropriate decisions about real threat existence that leads to improvement of system protection. Proposed fuzzy rules are particularly discussed in the paper.
When measuring optical parameters of a photovoltaic silicon cell, precise results bring good elec... more When measuring optical parameters of a photovoltaic silicon cell, precise results bring good electrical parameters estimation, applying well-known physical-mathematical models. Nevertheless, considerable re-combination phenomena might occur in both surface and intrinsic thin layers within novel materials. Moreover, rear contact surface parameters may influence close-area re-combination phenomena, too. Therefore, the only precise electrical measurement approach is to prove assumed cell electrical parameters. Based on theoretical approach with respect to experiments, this paper analyses problems within measurement procedures and equipment used for electrical parameters acquisition within a photovoltaic silicon cell, as a case study. Statistical appraisal quality is contributed.
Electromagnetic field can run engineer or electric machine as well put them to inconvenience. Thi... more Electromagnetic field can run engineer or electric machine as well put them to inconvenience. This paper presents calorimetric non-destructive test model using Electromagnetics module Comsol Multiphysics ® computing and visualization tools for preliminary estimate in electromagnetic compatibility application field.
When measuring optical parameters of a photovoltaic silicon cell, precise results bring good elec... more When measuring optical parameters of a photovoltaic silicon cell, precise results bring good electrical parameters estimation, applying well-known physical-mathematical models. Nevertheless, considerable re-combination phenomena might occur in both surface and intrinsic thin layers within novel materials. Moreover, rear contact surface parameters may influence close-area re-combination phenomena, too. Therefore, the only precise electrical measurement approach is to prove assumed cell electrical parameters. Based on theoretical approach with respect to experiments, this paper analyses problems within measurement procedures and equipment used for electrical parameters acquisition within a photovoltaic silicon cell, as a case study. Statistical appraisal quality is contributed.
V článku sú zverejnené poznatky z odborných kontrol a revízií výpočtovej techniky so zameraním na... more V článku sú zverejnené poznatky z odborných kontrol a revízií výpočtovej techniky so zameraním na zdrojovú časť osobného počítača (PC), ktorý predstavuje elektrický predmet triedy ochrany I v skriňových kovových verziách. Revízia PC a periférnych zariadení sa po obsahovej stránke vykonáva v súlade s odporúčaním STN 33 1610. ÚVOD Zamestnávateľ a pracovník môže užívať pracovné prostriedky (napr. osobný počítač /zariadenie triedy ochrany I) a používať pracovné postupy, len ak zodpovedajú predpisom na zaistenie bezpečnosti a ochrany zdravia pri práci, ak sú dodržané podmienky, ktoré vymedzil projektant, konštruktér, tvorca alebo výrobca a po vykonaní údržby, prehliadok, kontrol, skúšok alebo odborných prehliadok a odborných skúšok (revízií) ustanovených osobitnými predpismi alebo technickou dokumentáciou výrobcu (13 ods. 3, Zákona č. 124/2006 Z. z., o bezpečnosti a ochrane zdravie pri práci a o zmene a doplnení niektorých zákonov (Zákon č. 309/2007 Z. z., Zákon č. 140/2008 Z. z.). Tým j...
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power dis-tribution network is inaccessible. Internal and exter-nal subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both se-curity concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft pro-tection, breaking doors or windows signaling and coun-termeasure, weather extremes alert, etc. Both inter-nal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsys-tem. It consists from p...
Electromagnetic field can run engineer or electric machine as well put them to inconvenience. Thi... more Electromagnetic field can run engineer or electric machine as well put them to inconvenience. This paper presents calorimetric non-destructive test model using Electromagnetics module Comsol Multiphysics ® computing and visualization tools for preliminary estimate in electromagnetic compatibility application field.
This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using Ma... more This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using Matlab® modelling. In first step, Matlab® theoretical model is set to calculate I-V and P-V characteristics for PV module based on equivalent electrical circuit. Then, limited I-V data string is obtained from examined PV module using standard measurement equipment at standard irradiation and temperature conditions and stated into Matlab® data matrix as a reference model. Next, the theoretical model is optimized to keep-up with the reference model and to learn its basic parameters relations, over sparse data matrix. Finally, PV module parameters are deliverable for acquisition at different realistic irradiation and temperature conditions.
This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using MA... more This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using MATLAB and Simulink modelling. In first step, MATLAB and Simulink theoretical model are set to calculate I-V and P-V characteristics for PV module based on equivalent electrical circuit. Then, limited I-V data string is obtained from examined PV module using standard measurement equipment at standard irradiation and temperature conditions and stated into MATLAB data matrix as a reference model. Next, the theoretical model is optimized to keep-up with the reference model and to learn its basic parameters relations, over sparse data matrix. Finally, PV module parameters are deliverable for acquisition at different realistic irradiation, temperature conditions as well as series resistance. Besides of output power characteristics and efficiency calculation for PV module or system, proposed model validates computing statistical deviation compared to reference model.
Advances in Electrical and Electronic Engineering, 2014
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power distribution network is inaccessible. Internal and external subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both security concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft protection, breaking doors or windows signaling and countermeasure, weather extremes alert, etc. Both internal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsystem. It consists from pervasive sensor circuits, fuzzy controlled diagnostics and executive actuators. Cooperated fuzzy logic diagnostic and control device enables to evaluate anticipated threats and dynamically generates the most appropriate decisions about real threat existence that leads to improvement of system protection. Proposed fuzzy rules are particularly discussed in the paper.
2017 Communication and Information Technologies (KIT), 2017
To achieve optimal data routing along fiber optics, analytical and algorithmic methods are used. ... more To achieve optimal data routing along fiber optics, analytical and algorithmic methods are used. When some degradation factors cause temporary optical fiber impairment, optimization of data routing is an essential problem. However, the temporality is quite vague and, some network parameters are difficult to quantify. While optimizing temporarily changed route in an optical network, any cooperating solution might be helpful to re-route transmission links to avoid links overloading and data loss. This paper provides novel solution for routing optimization within simple multi-path optical network. Fuzzy logic diagnostic and control subsystem enable transmission threats evaluation within an optical network. They cooperatively generate the most appropriate dynamic decisions for current data routing. They also improve data transmission reliability. Proposed fuzzy rules are particularly discussed in the paper.
Stand-alone o-grid power supply system is a necessity for applications when electrical power dis-... more Stand-alone o-grid power supply system is a necessity for applications when electrical power dis- tribution network is inaccessible. Internal and exter- nal subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both se- curity concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft pro- tection, breaking doors or windows signaling and coun- termeasure, weather extremes alert, etc. Both inter- nal and external aspects necessarily induce additional o-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for o-grid security subsys- tem. It consists from ...
Intrinsic resistivity of any semiconductor silicon layer strongly depends on dopants and impuriti... more Intrinsic resistivity of any semiconductor silicon layer strongly depends on dopants and impurities concentrations. Structural properties, treating, coating, finishing etc. affect dynamic resistance behaviour of a given p-n junction in a wafer. It is important for massively used photovoltaics, optoelectronics, microelectronics, and other solid-state electronics. In this work, efficient, universally applicable methodology is presented to investigate silicon resistive parameters. First, the silicon band gap models are studied. Influence of electrical resistivity on resistances and complex impedance parts is investigated. Dynamic iterative numerical modelling and simulations combined with sparse-matrix experimental measurements lead to extrapolated behaviours of these resistive parameters. All parameters are investigated within acceptable practical interval up to extremals.
This article brings new approach to optical network optimization. When routing data in fast optic... more This article brings new approach to optical network optimization. When routing data in fast optical networks, defined parameters of each path are taken into account and evaluated to find optimized path for data routing. Our fuzzy logic approach implements fuzzy weighed parameterization to achieve optimal path setup in decision process, over WDM network structure. Complex path evaluation and dynamic routing using fuzzy logic can provide better results and faster decisioning for data transport in optical networks.
Advances in Electrical and Electronic Engineering, Dec 29, 2014
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power distribution network is inaccessible. Internal and external subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both security concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft protection, breaking doors or windows signaling and countermeasure, weather extremes alert, etc. Both internal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsystem. It consists from pervasive sensor circuits, fuzzy controlled diagnostics and executive actuators. Cooperated fuzzy logic diagnostic and control device enables to evaluate anticipated threats and dynamically generates the most appropriate decisions about real threat existence that leads to improvement of system protection. Proposed fuzzy rules are particularly discussed in the paper.
When measuring optical parameters of a photovoltaic silicon cell, precise results bring good elec... more When measuring optical parameters of a photovoltaic silicon cell, precise results bring good electrical parameters estimation, applying well-known physical-mathematical models. Nevertheless, considerable re-combination phenomena might occur in both surface and intrinsic thin layers within novel materials. Moreover, rear contact surface parameters may influence close-area re-combination phenomena, too. Therefore, the only precise electrical measurement approach is to prove assumed cell electrical parameters. Based on theoretical approach with respect to experiments, this paper analyses problems within measurement procedures and equipment used for electrical parameters acquisition within a photovoltaic silicon cell, as a case study. Statistical appraisal quality is contributed.
Electromagnetic field can run engineer or electric machine as well put them to inconvenience. Thi... more Electromagnetic field can run engineer or electric machine as well put them to inconvenience. This paper presents calorimetric non-destructive test model using Electromagnetics module Comsol Multiphysics ® computing and visualization tools for preliminary estimate in electromagnetic compatibility application field.
When measuring optical parameters of a photovoltaic silicon cell, precise results bring good elec... more When measuring optical parameters of a photovoltaic silicon cell, precise results bring good electrical parameters estimation, applying well-known physical-mathematical models. Nevertheless, considerable re-combination phenomena might occur in both surface and intrinsic thin layers within novel materials. Moreover, rear contact surface parameters may influence close-area re-combination phenomena, too. Therefore, the only precise electrical measurement approach is to prove assumed cell electrical parameters. Based on theoretical approach with respect to experiments, this paper analyses problems within measurement procedures and equipment used for electrical parameters acquisition within a photovoltaic silicon cell, as a case study. Statistical appraisal quality is contributed.
V článku sú zverejnené poznatky z odborných kontrol a revízií výpočtovej techniky so zameraním na... more V článku sú zverejnené poznatky z odborných kontrol a revízií výpočtovej techniky so zameraním na zdrojovú časť osobného počítača (PC), ktorý predstavuje elektrický predmet triedy ochrany I v skriňových kovových verziách. Revízia PC a periférnych zariadení sa po obsahovej stránke vykonáva v súlade s odporúčaním STN 33 1610. ÚVOD Zamestnávateľ a pracovník môže užívať pracovné prostriedky (napr. osobný počítač /zariadenie triedy ochrany I) a používať pracovné postupy, len ak zodpovedajú predpisom na zaistenie bezpečnosti a ochrany zdravia pri práci, ak sú dodržané podmienky, ktoré vymedzil projektant, konštruktér, tvorca alebo výrobca a po vykonaní údržby, prehliadok, kontrol, skúšok alebo odborných prehliadok a odborných skúšok (revízií) ustanovených osobitnými predpismi alebo technickou dokumentáciou výrobcu (13 ods. 3, Zákona č. 124/2006 Z. z., o bezpečnosti a ochrane zdravie pri práci a o zmene a doplnení niektorých zákonov (Zákon č. 309/2007 Z. z., Zákon č. 140/2008 Z. z.). Tým j...
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power dis-tribution network is inaccessible. Internal and exter-nal subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both se-curity concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft pro-tection, breaking doors or windows signaling and coun-termeasure, weather extremes alert, etc. Both inter-nal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsys-tem. It consists from p...
Electromagnetic field can run engineer or electric machine as well put them to inconvenience. Thi... more Electromagnetic field can run engineer or electric machine as well put them to inconvenience. This paper presents calorimetric non-destructive test model using Electromagnetics module Comsol Multiphysics ® computing and visualization tools for preliminary estimate in electromagnetic compatibility application field.
This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using Ma... more This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using Matlab® modelling. In first step, Matlab® theoretical model is set to calculate I-V and P-V characteristics for PV module based on equivalent electrical circuit. Then, limited I-V data string is obtained from examined PV module using standard measurement equipment at standard irradiation and temperature conditions and stated into Matlab® data matrix as a reference model. Next, the theoretical model is optimized to keep-up with the reference model and to learn its basic parameters relations, over sparse data matrix. Finally, PV module parameters are deliverable for acquisition at different realistic irradiation and temperature conditions.
This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using MA... more This paper presents basic procedures for photovoltaic (PV) module parameters acquisition using MATLAB and Simulink modelling. In first step, MATLAB and Simulink theoretical model are set to calculate I-V and P-V characteristics for PV module based on equivalent electrical circuit. Then, limited I-V data string is obtained from examined PV module using standard measurement equipment at standard irradiation and temperature conditions and stated into MATLAB data matrix as a reference model. Next, the theoretical model is optimized to keep-up with the reference model and to learn its basic parameters relations, over sparse data matrix. Finally, PV module parameters are deliverable for acquisition at different realistic irradiation, temperature conditions as well as series resistance. Besides of output power characteristics and efficiency calculation for PV module or system, proposed model validates computing statistical deviation compared to reference model.
Advances in Electrical and Electronic Engineering, 2014
Stand-alone off-grid power supply system is a necessity for applications when electrical power di... more Stand-alone off-grid power supply system is a necessity for applications when electrical power distribution network is inaccessible. Internal and external subject security aspects should be valued, and the system should be optimized to obtain properly working, never-failing and secure local electrical power supply system. Internal security aspects result from both security concept and used technologies. Internal threats contain fire ignition, flooding, electrical cables melting and other threats arising from intrinsic materials or subsystems characteristics, at standard conditions of use. Additional external aspects include anti-theft protection, breaking doors or windows signaling and countermeasure, weather extremes alert, etc. Both internal and external aspects necessarily induce additional off-grid power system or subject monitoring that might be performed by supervising security subsystem. This paper provides a solution for off-grid security subsystem. It consists from pervasive sensor circuits, fuzzy controlled diagnostics and executive actuators. Cooperated fuzzy logic diagnostic and control device enables to evaluate anticipated threats and dynamically generates the most appropriate decisions about real threat existence that leads to improvement of system protection. Proposed fuzzy rules are particularly discussed in the paper.
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Papers by Gabriel Cibira