Zdenek Lokaj
Czech Technical University in Prague
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Publication
Featured researches published by Zdenek Lokaj.
international conference on telecommunications | 2013
Lukas Vojtech; Angel Maria Fabregas Lopez; Marek Neruda; Zdenek Lokaj
Monitoring of technology processes is crucial for quality management and also for effectiveness of following logistics chain to achieve customer expectations and requirements. The control of upheavals of moulding presses often fails in using manual records. It is crucial mainly for owners moulds. The improvement is solved by RFID technology and read-write tags. This paper focuses on full description of the system which controls the number of upheavals of the moulding press. It is not based on direct recording into tags, but on clientserver application. It uses web based interface with access by mobile phone. The evaluation in real operation confirms improvement in controlling of moulds operation.
international conference on intelligent transportation systems | 2010
Miroslav Svitek; V. Faltus; Zdenek Lokaj
Project of applied research called “Analysis of technical and metrological requirements for GNSS receiving devices and their operations” is a part of a Metrology development program funded by Czech Office for Standards, Metrology and Testing. The project started in 2008 and its second part executed in 2009 was focused on preparation of certification procedures for first ITS applications and pilot testing of the procedures. The virtual gate passage detection (used in the systems such as EFC) was chosen as one of the tested applications. Results will be used as a benchmark for later testing and certification. Goal of the project is certification authority establishment to provide verification of defined parameters achievement in ITS critical systems which increases transport effectiveness and quality.
2015 Smart Cities Symposium Prague (SCSP) | 2015
Martin Srotyr; Zdenek Lokaj; Tomas Zelinka
Cooperative systems play an important role in the field of telematics and automotive industry and they have a huge potential to continuously grow. To ensure proper functioning it is necessary to deal with telecommunication solutions being able to support relevant information dissemination within vehicles networks. There are many different approaches to networking and information distribution in VANET networks. Different approaches can meet partial requirements; however, none of the existing approaches can offer solution being able to meet all key requirements generated by the real traffic. The conclusions of our studies and simulations so far show that an appropriate option must combine Geocast based routing type with centrally operated cluster based support. Such approach also well fits with available telecommunications system architecture applicable for VANET solutions.
2012 IEEE Colombian Intelligent Transportation Systems Symposium (CITSS) | 2012
Miroslav Svitek; Tomas Zelinka; Zdenek Lokaj
Intelligent Transport Systems (ITS) solutions expect availability of the secure seamless communications solutions typically covering widely spread areas. Different solutions require different levels of telecommunications service quality. These parameters have to correspond with ITS service performance parameters required by specific service. Even though quite extensive range of wireless data services with reasonable coverage are provided by public telecommunications providers practically all services are provided with no guaranteed data service quality and security. ITS requirements can be better resolved if typically used public solution is combined with both other public as well as private services where and when it is needed. Such solution requires implementation of relevant flexible system architecture supported by the efficient decision processes. Paper is concentrated on the telecommunications security issues with dynamically changing wide area networking. Expected level of security depend on relevant ITS services requirements. It is well known fact that data volumes transferred both in private data vehicle on board networks as well as between vehicles and infrastructure or other vehicles significantly and progressively grow. Such trend leads to increase of the fatal problems appearance probability if security of the wide area networks is not relevantly treated. Probability of hazards appearances grow if vehicles networks are integrated in the dynamically organized wide area networks. That is reason why relevant communications security treatment becomes crucial part of the ITS telecommunications solution. Besides of available “off shelf” security tools solution based on non-public universal identifier with dynamical extension and data selection according to actor role or category is presented.
2017 Smart City Symposium Prague (SCSP) | 2017
Martin Srotyr; Tomas Zelinka; Zdenek Lokaj
Smart mobility based on cooperative systems (C-ITS) represents one of the Smart Cities topics. Guaranteed quality of data exchange both between VANET (Vehicular Ad hoc Network) members (V2V) as well as between VANET and Infrastructure (V2I) represents critical condition for suitable functions of the cooperative systems. We proposed hybrid routing protocol for VANET networking based on application of two most widely accepted mobile technologies and theirs combination. Finally, we compared in VANET communication simulation proposed protocol performance with performance of mostly discussed routing protocols designed for VANET conditions.
2016 Smart Cities Symposium Prague (SCSP) | 2016
Martin Srotyr; Tomas Zelinka; Zdenek Lokaj
Cooperative Systems are part of the Smart Cities solutions. This Article presents two pilot applications of cooperative systems. First was the project BaSIC, which aimed to design, develop and validate solution to increase the road safety through cooperative systems. Second was the application of cooperative systems for the Road and Motorway Directorate. In both project was measured several parameters that give us an idea about suitability of use the chosen technology for future use.
2015 Smart Cities Symposium Prague (SCSP) | 2015
Martin Srotyr; Michal Jerabek; Zdenek Lokaj; Tomas Zelinka
This paper presents the result of the project TA02031411 - transportation system which provides information about the predicted occupancy of parking spaces to truck drivers. Providing this information leads to optimizing the use of existing parking spaces on the highway network and also makes it easier for drivers to deciding on a suitable location for parking, which ultimately contributes to the fluency and safety of traffic.
international conference on transport systems telematics | 2010
Miroslav Svitek; Vladimir Faltus; Zdenek Lokaj
Project of applied research called “Analysis of technical and metrological requirements for GNSS receiving devices and their operations” is a part of the Metrology development program funded by the Czech Office for Standards, Metrology and Testing, started in 2008. The second part of the project executed in 2009 was focused on certification procedures preparation for first ITS applications and pilot testing of the procedures. The virtual gate passage detection (used in the systems such as the EFC) was chosen as one of the tested applications. Results will be used as a benchmark for later testing and certification. The goal of the project consists of the certification authority establishment to provide verification of defined parameters achievement in ITS critical systems which increases transport effectiveness and quality.
Archive | 2010
Tomas Zelinka; Miroslav Svitek; Zdenek Lokaj
Archive | 2013
Tomas Zelinka; Zdenek Lokaj; Martin Srotyr