Srdjan Tegeltija | University of Novi Sad, Faculty of Technical Sciences (original) (raw)

Papers by Srdjan Tegeltija

Research paper thumbnail of One Solution of Low-Cost Modular Control Device based on IoT

2023 22nd International Symposium INFOTEH-JAHORINA (INFOTEH)

Research paper thumbnail of Industrial Cyber Security Aspects in ICS Applications

Annals of DAAAM for ... & proceedings of the ... International DAAAM Symposium .., 2022

Regarding already growing technological progress and the new industrial revolution, Industry 4.0,... more Regarding already growing technological progress and the new industrial revolution, Industry 4.0, every day there is a bigger need of using security systems in Industrial Control Systems. Using closed or open architectures, which are connected locally or over the Internet, is much more vulnerable in terms of outside or inside attacks in terms of gathering pieces of information or just sabotage. In this paper, we make a survey of possible concepts which are used to eliminate the possibility of cyber-attacks on Industrial Systems. We will also make a classification of CPS Domains, Attacks, Defenses, Research-trends, Network-security, Security level implementation, and Computational Strategies.

Research paper thumbnail of Robust automation with PLC/PAC and edge controllers

Research paper thumbnail of Blockchain Framework for Certification of Organic Agriculture Production

Sustainability

Organic production, as a sustainable food production system, is designed to implement all agroeco... more Organic production, as a sustainable food production system, is designed to implement all agroecological principles that enable the preservation of human and animal health, environmental protection, and positive impact on society and the ecosystem while achieving significant economic benefits. Demand for organic food products is constantly growing, and the land area under organic production is continuously increasing. The problem in this sector is that producers of organic products face many administrative and systemic obstacles that prevent the faster development of this sector. On the other hand, consumers do not have complete confidence in the current mechanisms of control of organic production, so in the sale on the food markets and in the rest of the market, fake and unverified organic products can be found. Based on sensor data from the production field, this paper presents the SAFE platform as a solution for the described problem. The data necessary for producers to carry out...

Research paper thumbnail of One Solution of System for Reducing Food Losses in Households based on IoT

2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)

Research paper thumbnail of One Approach for Determining Availability of Parking Lots in Shared Parking For Disabled Person

Proceedings of the 32nd International DAAAM Symposium 2021, 2021

Conventional direct current electrocoagulation (DC-EC) has disadvantages such as easy passivation... more Conventional direct current electrocoagulation (DC-EC) has disadvantages such as easy passivation of electrodes, high energy consumption, and large sludge production, which limit its use in polyvinyl alcohol (PVA) wastewater. Therefore, alternating pulse current electrocoagulation (APC-EC) has been developed to overcome these problems. In this study, the influencing factors and energy consumption of PVA treatment by APC-EC and DC-EC were explored, and the best operating conditions of APC-EC were obtained via the response surface method (RSM). The best process conditions for APC-EC were determined to be the electrode type of Fe/Fe, current density of 1.0 mA cm À2 , initial pH of 7, electrode distance of 2.0 cm, supporting electrolyte of 0.08 mol L À1 NaCl, initial PVA concentration of 150 mg L À1 , duty cycle of 30%, and frequency of 500 Hz. In addition, the floc properties of APC-EC and DC-EC were compared to explore the basic mechanism for the removal of PVA. Adsorption and co-precipitation with hydroxide iron complexes are the main methods for removing PVA from wastewater in the APC-EC process. Compared with DC-EC, the application of APC-EC can reduce electrode passivation and production of sludge and operating costs, and improve electrode stability and PVA removal efficiency. This study provides a new strategy and method for the PVA removal from wastewater by APC-EC with low cost and high efficiency, showing broad prospect for the applications of the APC-EC in removing PVA.

Research paper thumbnail of Universal IoT Vending Machine Management Platform

2020 19th International Symposium INFOTEH-JAHORINA (INFOTEH), 2020

This research was conducted to answer two questions namely what kinds of problems faced by MSMEs ... more This research was conducted to answer two questions namely what kinds of problems faced by MSMEs in East Indonesia in general and how the creativity and innovation should be enhanced so that MSMEs have competitive advantage in running the business. This research uses qualitative method with phenomenological approach. The results of this study indicate that the level of creativity and innovation of MSMEs in East Indonesia is still low so that many MSMEs are not growing because of less able to compete. It needs immediate improvements so that Indonesian MSMEs can continue to grow and have a strong competitiveness.

Research paper thumbnail of Improvement of Smart Parking Barrier Autonomy Using Battery Supply

DAAAM Proceedings, 2019

This paper gives one of the smart solutions to the problem that is nowadays becoming more signifi... more This paper gives one of the smart solutions to the problem that is nowadays becoming more significant and that is the problem of vehicle parking, especially in densely populated areas. As part of the solution to the previous problem is the explanation given in this paper on how the smart parking barrier works and how it is being used. In addition, smart parking barrier construction idea is shown, as well as the way to control the barrier and the way the barrier moves. Later, it is shown how the battery pack powered parking barrier works. Several tests have been performed on three different battery pack solutions, produced by different manufacturers, to show the durability and with that the quality of each of the battery packs. Data for each test is collected and analyzed.

Research paper thumbnail of IoT –Based Information Systems in Seed-to-Fork Food Production

Agribusiness industry and food production are dealing with perishable products, unpredictable pro... more Agribusiness industry and food production are dealing with perishable products, unpredictable production and supply chain management variations, tendency to maximize waste reduction and adherence to strict regulations related to food safety. The Internet of Things (IoT) includes several technologies that can be put into practice, in order to respond to all these demands and resolve challenges, as it allows remote control of the production conditions and distribution of products. In this paper, an architecture for IoT-based information systems in seed-to-fork food production is proposed. The architecture includes IoT from the first to the last phase of production, distribution and even feedback consumers. The authors propose a hybrid solution that combines the IoT and Future Internet.

Research paper thumbnail of Improving the Safety of Using Didactic Setups by Applying Augmented Reality

Research paper thumbnail of Food Delivery Using Cargo-Bikes with IoT

Proceedings on 25th International Joint Conference on Industrial Engineering and Operations Management – IJCIEOM, 2020

Research paper thumbnail of One Solution for Validation of Legal Usage Of Reserved Parking Spaces For People With Disabilities

2021 20th International Symposium INFOTEH-JAHORINA (INFOTEH), 2021

Lack of parking spaces in cities makes modern life in cities more difficult. The constant increas... more Lack of parking spaces in cities makes modern life in cities more difficult. The constant increase in the number of people in cities is followed by an increase of vehicles on streets which results in decrees of unoccupied parking spaces. Also, drivers are making illegal use of parking spaces reserved for people with disabilities, and because of that people with disabilities cannot rely on using these parking spaces. This paper presents a solution that is based on the validation of drivers that park their vehicles in parking spaces for people with disabilities. By detection of parking sensor that parking space is occupied and by validation of user through user mobile app after scanning QR code, the described system verifies validation of user and in case that user is not allowed to park appropriate service is notified.

Research paper thumbnail of Development of didactic dosing system for raw materials in the form of granules

International Journal of Engineering Education, 2014

Dosing process can be applied in various industries. In order to better prepare students for the ... more Dosing process can be applied in various industries. In order to better prepare students for the requirements, conditions andequipment that exists in the industry, a dosing system for raw material has been developed at the Faculty of Technical Sciences,Novi Sad. The main objective was to enable students to work with flexible system in terms of raw material types. Other importantobjectives were to allow students to become acquainted with different types of actuators and sensors, Field bus systems,Supervisory Control and Data Acquisition (SCADA) systems, material handling, intelligent control systems, and to learn methodsof dosing system design and implementation. In this paper, a detailed description of the developed didactic dosing system for rawmaterials is presented. This dosing system supports in-class hands-on activities in material handling tasks, allowing them to learnabout the structure of the dosing system and its components. Through this learning process students are able t...

Research paper thumbnail of One Approach to the Detection of Illegal Occupation of Parking Spaces Reserved for Persons with Disabilities

Research paper thumbnail of Heating circulation pump disassembly process improved with augmented reality

Thermal Science, 2016

The purpose of the paper is to introduce the possibilities of the implementation of augmented rea... more The purpose of the paper is to introduce the possibilities of the implementation of augmented reality concept in the disassembly process. The basic concept of augmented reality implementation in various applications, as well as the developed concept in the disassembly system is presented. Main objective of this paper was to test the influence of the implementation of augmented reality in the disassembly process with the goal of shortening the overall duration of the disassembly process. In this paper the experimental setup of the developed concept in the disassembly system for heating circulation pump that was conducted in laboratory conditions is shown, and conclusions are presented.

Research paper thumbnail of A readability analysis for QR code application in a traceability system

Computers and Electronics in Agriculture, 2014

Traceability of data through transformation stages of each individual food product, starting from... more Traceability of data through transformation stages of each individual food product, starting from raw products and to the final product, as well as printing the key data on the product package, adds to the consumers' trust in product quality. For each food product, it is necessary to track data starting from the stage of raw products farming, through food processing, transport, warehousing, to retailing and reaching the end consumer. In order to allow insight to the key data to the user (mostly end consumer), this paper suggests recording the data on the product package in the form of a quick response twodimensional barcode (QR code) in key points of the product's life cycle. For efficient functioning of the proposed system, it is essential to ensure fast and reliable operation through proper placement of the QR code on the package during production, and fast and easy data reading by the product consumer. This paper presents the results of a readability analysis of QR code of variable contents, size and data error correction level, which are read by smartphones running an Android platform. The experiments were performed with various types of base material on which the code was printed. Furthermore, QR code readability analysis was conducted in the case when there is a geometric deformation of the code. Based on the detailed analysis of the collected data, it can be concluded that QR code readability is not directly influenced by the number of coded characters, or by the error correction level, but only by the size of modules that constitute the code. Furthermore, the results show that the change of the base material does not influence the read time, but influences the code readability. The paper further presents an example of the proposed traceability system, where the QR codes are used for data tracking and tracing for fruit yogurts, based on the recommendations gained through the readability analysis. This traceability system concept is universal and can be used for various products with slight modifications.

Research paper thumbnail of Bluetooth parking access control

Sensor Review, 2014

ABSTRACT Purpose ‐ The purpose of this paper is to describe an approach of using mobile phones wi... more ABSTRACT Purpose ‐ The purpose of this paper is to describe an approach of using mobile phones with Bluetooth technology to enter/exit restricted area. Design/methodology/approach ‐ Applied Bluetooth technology implemented in mobile phones enables the user to perform the identification and the state of presence while entering/exiting the parking space without stopping the vehicle. For the successful implementation of this method for presence detection and proper identification, it is necessary to determine the values of the Bluetooth signal. Findings ‐ This paper discuses a case study that has been done at entry/exit of parking lots. The obtained experimental results show that mobile phones with the Bluetooth technology can be successfully applied as presence detection sensors, as well as in processes for the identification of the user/object in the move. Practical implications ‐ The paper gives a primer how mobile phones with Bluetooth technology, in addition to their basic purpose, can be used as identification devices to enter/exit restricted area. Originality/value ‐ The users have possibilities to access restricted area using a common device ‐ a mobile phone with Bluetooth technology. Successful implementation of developed access control system is based on determining the proper value of the Bluetooth signal strength field that extends around the control cabinet in which the Bluetooth devices are situated.

Research paper thumbnail of A readability analysis for QR code application in a traceability system

Computers and Electronics in Agriculture, 2014

Traceability of data through transformation stages of each individual food product, starting from... more Traceability of data through transformation stages of each individual food product, starting from raw products and to the final product, as well as printing the key data on the product package, adds to the consumers' trust in product quality. For each food product, it is necessary to track data starting from the stage of raw products farming, through food processing, transport, warehousing, to retailing and reaching the end consumer. In order to allow insight to the key data to the user (mostly end consumer), this paper suggests recording the data on the product package in the form of a quick response twodimensional barcode (QR code) in key points of the product's life cycle. For efficient functioning of the proposed system, it is essential to ensure fast and reliable operation through proper placement of the QR code on the package during production, and fast and easy data reading by the product consumer. This paper presents the results of a readability analysis of QR code of variable contents, size and data error correction level, which are read by smartphones running an Android platform. The experiments were performed with various types of base material on which the code was printed. Furthermore, QR code readability analysis was conducted in the case when there is a geometric deformation of the code. Based on the detailed analysis of the collected data, it can be concluded that QR code readability is not directly influenced by the number of coded characters, or by the error correction level, but only by the size of modules that constitute the code. Furthermore, the results show that the change of the base material does not influence the read time, but influences the code readability. The paper further presents an example of the proposed traceability system, where the QR codes are used for data tracking and tracing for fruit yogurts, based on the recommendations gained through the readability analysis. This traceability system concept is universal and can be used for various products with slight modifications.

Research paper thumbnail of Bluetooth parking access control

Purpose – The purpose of this paper is to describe an approach of using mobile phones with Bluet... more Purpose
– The purpose of this paper is to describe an approach of using mobile phones with Bluetooth technology to enter/exit restricted area.

Design/methodology/approach
– Applied Bluetooth technology implemented in mobile phones enables the user to perform the identification and the state of presence while entering/exiting the parking space without stopping the vehicle. For the successful implementation of this method for presence detection and proper identification, it is necessary to determine the values of the Bluetooth signal.

Findings
– This paper discuses a case study that has been done at entry/exit of parking lots. The obtained experimental results show that mobile phones with the Bluetooth technology can be successfully applied as presence detection sensors, as well as in processes for the identification of the user/object in the move.

Practical implications
– The paper gives a primer how mobile phones with Bluetooth technology, in addition to their basic purpose, can be used as identification devices to enter/exit restricted area.

Originality/value
– The users have possibilities to access restricted area using a common device – a mobile phone with Bluetooth technology. Successful implementation of developed access control system is based on determining the proper value of the Bluetooth signal strength field that extends around the control cabinet in which the Bluetooth devices are situated.

Research paper thumbnail of One Solution of Low-Cost Modular Control Device based on IoT

2023 22nd International Symposium INFOTEH-JAHORINA (INFOTEH)

Research paper thumbnail of Industrial Cyber Security Aspects in ICS Applications

Annals of DAAAM for ... & proceedings of the ... International DAAAM Symposium .., 2022

Regarding already growing technological progress and the new industrial revolution, Industry 4.0,... more Regarding already growing technological progress and the new industrial revolution, Industry 4.0, every day there is a bigger need of using security systems in Industrial Control Systems. Using closed or open architectures, which are connected locally or over the Internet, is much more vulnerable in terms of outside or inside attacks in terms of gathering pieces of information or just sabotage. In this paper, we make a survey of possible concepts which are used to eliminate the possibility of cyber-attacks on Industrial Systems. We will also make a classification of CPS Domains, Attacks, Defenses, Research-trends, Network-security, Security level implementation, and Computational Strategies.

Research paper thumbnail of Robust automation with PLC/PAC and edge controllers

Research paper thumbnail of Blockchain Framework for Certification of Organic Agriculture Production

Sustainability

Organic production, as a sustainable food production system, is designed to implement all agroeco... more Organic production, as a sustainable food production system, is designed to implement all agroecological principles that enable the preservation of human and animal health, environmental protection, and positive impact on society and the ecosystem while achieving significant economic benefits. Demand for organic food products is constantly growing, and the land area under organic production is continuously increasing. The problem in this sector is that producers of organic products face many administrative and systemic obstacles that prevent the faster development of this sector. On the other hand, consumers do not have complete confidence in the current mechanisms of control of organic production, so in the sale on the food markets and in the rest of the market, fake and unverified organic products can be found. Based on sensor data from the production field, this paper presents the SAFE platform as a solution for the described problem. The data necessary for producers to carry out...

Research paper thumbnail of One Solution of System for Reducing Food Losses in Households based on IoT

2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)

Research paper thumbnail of One Approach for Determining Availability of Parking Lots in Shared Parking For Disabled Person

Proceedings of the 32nd International DAAAM Symposium 2021, 2021

Conventional direct current electrocoagulation (DC-EC) has disadvantages such as easy passivation... more Conventional direct current electrocoagulation (DC-EC) has disadvantages such as easy passivation of electrodes, high energy consumption, and large sludge production, which limit its use in polyvinyl alcohol (PVA) wastewater. Therefore, alternating pulse current electrocoagulation (APC-EC) has been developed to overcome these problems. In this study, the influencing factors and energy consumption of PVA treatment by APC-EC and DC-EC were explored, and the best operating conditions of APC-EC were obtained via the response surface method (RSM). The best process conditions for APC-EC were determined to be the electrode type of Fe/Fe, current density of 1.0 mA cm À2 , initial pH of 7, electrode distance of 2.0 cm, supporting electrolyte of 0.08 mol L À1 NaCl, initial PVA concentration of 150 mg L À1 , duty cycle of 30%, and frequency of 500 Hz. In addition, the floc properties of APC-EC and DC-EC were compared to explore the basic mechanism for the removal of PVA. Adsorption and co-precipitation with hydroxide iron complexes are the main methods for removing PVA from wastewater in the APC-EC process. Compared with DC-EC, the application of APC-EC can reduce electrode passivation and production of sludge and operating costs, and improve electrode stability and PVA removal efficiency. This study provides a new strategy and method for the PVA removal from wastewater by APC-EC with low cost and high efficiency, showing broad prospect for the applications of the APC-EC in removing PVA.

Research paper thumbnail of Universal IoT Vending Machine Management Platform

2020 19th International Symposium INFOTEH-JAHORINA (INFOTEH), 2020

This research was conducted to answer two questions namely what kinds of problems faced by MSMEs ... more This research was conducted to answer two questions namely what kinds of problems faced by MSMEs in East Indonesia in general and how the creativity and innovation should be enhanced so that MSMEs have competitive advantage in running the business. This research uses qualitative method with phenomenological approach. The results of this study indicate that the level of creativity and innovation of MSMEs in East Indonesia is still low so that many MSMEs are not growing because of less able to compete. It needs immediate improvements so that Indonesian MSMEs can continue to grow and have a strong competitiveness.

Research paper thumbnail of Improvement of Smart Parking Barrier Autonomy Using Battery Supply

DAAAM Proceedings, 2019

This paper gives one of the smart solutions to the problem that is nowadays becoming more signifi... more This paper gives one of the smart solutions to the problem that is nowadays becoming more significant and that is the problem of vehicle parking, especially in densely populated areas. As part of the solution to the previous problem is the explanation given in this paper on how the smart parking barrier works and how it is being used. In addition, smart parking barrier construction idea is shown, as well as the way to control the barrier and the way the barrier moves. Later, it is shown how the battery pack powered parking barrier works. Several tests have been performed on three different battery pack solutions, produced by different manufacturers, to show the durability and with that the quality of each of the battery packs. Data for each test is collected and analyzed.

Research paper thumbnail of IoT –Based Information Systems in Seed-to-Fork Food Production

Agribusiness industry and food production are dealing with perishable products, unpredictable pro... more Agribusiness industry and food production are dealing with perishable products, unpredictable production and supply chain management variations, tendency to maximize waste reduction and adherence to strict regulations related to food safety. The Internet of Things (IoT) includes several technologies that can be put into practice, in order to respond to all these demands and resolve challenges, as it allows remote control of the production conditions and distribution of products. In this paper, an architecture for IoT-based information systems in seed-to-fork food production is proposed. The architecture includes IoT from the first to the last phase of production, distribution and even feedback consumers. The authors propose a hybrid solution that combines the IoT and Future Internet.

Research paper thumbnail of Improving the Safety of Using Didactic Setups by Applying Augmented Reality

Research paper thumbnail of Food Delivery Using Cargo-Bikes with IoT

Proceedings on 25th International Joint Conference on Industrial Engineering and Operations Management – IJCIEOM, 2020

Research paper thumbnail of One Solution for Validation of Legal Usage Of Reserved Parking Spaces For People With Disabilities

2021 20th International Symposium INFOTEH-JAHORINA (INFOTEH), 2021

Lack of parking spaces in cities makes modern life in cities more difficult. The constant increas... more Lack of parking spaces in cities makes modern life in cities more difficult. The constant increase in the number of people in cities is followed by an increase of vehicles on streets which results in decrees of unoccupied parking spaces. Also, drivers are making illegal use of parking spaces reserved for people with disabilities, and because of that people with disabilities cannot rely on using these parking spaces. This paper presents a solution that is based on the validation of drivers that park their vehicles in parking spaces for people with disabilities. By detection of parking sensor that parking space is occupied and by validation of user through user mobile app after scanning QR code, the described system verifies validation of user and in case that user is not allowed to park appropriate service is notified.

Research paper thumbnail of Development of didactic dosing system for raw materials in the form of granules

International Journal of Engineering Education, 2014

Dosing process can be applied in various industries. In order to better prepare students for the ... more Dosing process can be applied in various industries. In order to better prepare students for the requirements, conditions andequipment that exists in the industry, a dosing system for raw material has been developed at the Faculty of Technical Sciences,Novi Sad. The main objective was to enable students to work with flexible system in terms of raw material types. Other importantobjectives were to allow students to become acquainted with different types of actuators and sensors, Field bus systems,Supervisory Control and Data Acquisition (SCADA) systems, material handling, intelligent control systems, and to learn methodsof dosing system design and implementation. In this paper, a detailed description of the developed didactic dosing system for rawmaterials is presented. This dosing system supports in-class hands-on activities in material handling tasks, allowing them to learnabout the structure of the dosing system and its components. Through this learning process students are able t...

Research paper thumbnail of One Approach to the Detection of Illegal Occupation of Parking Spaces Reserved for Persons with Disabilities

Research paper thumbnail of Heating circulation pump disassembly process improved with augmented reality

Thermal Science, 2016

The purpose of the paper is to introduce the possibilities of the implementation of augmented rea... more The purpose of the paper is to introduce the possibilities of the implementation of augmented reality concept in the disassembly process. The basic concept of augmented reality implementation in various applications, as well as the developed concept in the disassembly system is presented. Main objective of this paper was to test the influence of the implementation of augmented reality in the disassembly process with the goal of shortening the overall duration of the disassembly process. In this paper the experimental setup of the developed concept in the disassembly system for heating circulation pump that was conducted in laboratory conditions is shown, and conclusions are presented.

Research paper thumbnail of A readability analysis for QR code application in a traceability system

Computers and Electronics in Agriculture, 2014

Traceability of data through transformation stages of each individual food product, starting from... more Traceability of data through transformation stages of each individual food product, starting from raw products and to the final product, as well as printing the key data on the product package, adds to the consumers' trust in product quality. For each food product, it is necessary to track data starting from the stage of raw products farming, through food processing, transport, warehousing, to retailing and reaching the end consumer. In order to allow insight to the key data to the user (mostly end consumer), this paper suggests recording the data on the product package in the form of a quick response twodimensional barcode (QR code) in key points of the product's life cycle. For efficient functioning of the proposed system, it is essential to ensure fast and reliable operation through proper placement of the QR code on the package during production, and fast and easy data reading by the product consumer. This paper presents the results of a readability analysis of QR code of variable contents, size and data error correction level, which are read by smartphones running an Android platform. The experiments were performed with various types of base material on which the code was printed. Furthermore, QR code readability analysis was conducted in the case when there is a geometric deformation of the code. Based on the detailed analysis of the collected data, it can be concluded that QR code readability is not directly influenced by the number of coded characters, or by the error correction level, but only by the size of modules that constitute the code. Furthermore, the results show that the change of the base material does not influence the read time, but influences the code readability. The paper further presents an example of the proposed traceability system, where the QR codes are used for data tracking and tracing for fruit yogurts, based on the recommendations gained through the readability analysis. This traceability system concept is universal and can be used for various products with slight modifications.

Research paper thumbnail of Bluetooth parking access control

Sensor Review, 2014

ABSTRACT Purpose ‐ The purpose of this paper is to describe an approach of using mobile phones wi... more ABSTRACT Purpose ‐ The purpose of this paper is to describe an approach of using mobile phones with Bluetooth technology to enter/exit restricted area. Design/methodology/approach ‐ Applied Bluetooth technology implemented in mobile phones enables the user to perform the identification and the state of presence while entering/exiting the parking space without stopping the vehicle. For the successful implementation of this method for presence detection and proper identification, it is necessary to determine the values of the Bluetooth signal. Findings ‐ This paper discuses a case study that has been done at entry/exit of parking lots. The obtained experimental results show that mobile phones with the Bluetooth technology can be successfully applied as presence detection sensors, as well as in processes for the identification of the user/object in the move. Practical implications ‐ The paper gives a primer how mobile phones with Bluetooth technology, in addition to their basic purpose, can be used as identification devices to enter/exit restricted area. Originality/value ‐ The users have possibilities to access restricted area using a common device ‐ a mobile phone with Bluetooth technology. Successful implementation of developed access control system is based on determining the proper value of the Bluetooth signal strength field that extends around the control cabinet in which the Bluetooth devices are situated.

Research paper thumbnail of A readability analysis for QR code application in a traceability system

Computers and Electronics in Agriculture, 2014

Traceability of data through transformation stages of each individual food product, starting from... more Traceability of data through transformation stages of each individual food product, starting from raw products and to the final product, as well as printing the key data on the product package, adds to the consumers' trust in product quality. For each food product, it is necessary to track data starting from the stage of raw products farming, through food processing, transport, warehousing, to retailing and reaching the end consumer. In order to allow insight to the key data to the user (mostly end consumer), this paper suggests recording the data on the product package in the form of a quick response twodimensional barcode (QR code) in key points of the product's life cycle. For efficient functioning of the proposed system, it is essential to ensure fast and reliable operation through proper placement of the QR code on the package during production, and fast and easy data reading by the product consumer. This paper presents the results of a readability analysis of QR code of variable contents, size and data error correction level, which are read by smartphones running an Android platform. The experiments were performed with various types of base material on which the code was printed. Furthermore, QR code readability analysis was conducted in the case when there is a geometric deformation of the code. Based on the detailed analysis of the collected data, it can be concluded that QR code readability is not directly influenced by the number of coded characters, or by the error correction level, but only by the size of modules that constitute the code. Furthermore, the results show that the change of the base material does not influence the read time, but influences the code readability. The paper further presents an example of the proposed traceability system, where the QR codes are used for data tracking and tracing for fruit yogurts, based on the recommendations gained through the readability analysis. This traceability system concept is universal and can be used for various products with slight modifications.

Research paper thumbnail of Bluetooth parking access control

Purpose – The purpose of this paper is to describe an approach of using mobile phones with Bluet... more Purpose
– The purpose of this paper is to describe an approach of using mobile phones with Bluetooth technology to enter/exit restricted area.

Design/methodology/approach
– Applied Bluetooth technology implemented in mobile phones enables the user to perform the identification and the state of presence while entering/exiting the parking space without stopping the vehicle. For the successful implementation of this method for presence detection and proper identification, it is necessary to determine the values of the Bluetooth signal.

Findings
– This paper discuses a case study that has been done at entry/exit of parking lots. The obtained experimental results show that mobile phones with the Bluetooth technology can be successfully applied as presence detection sensors, as well as in processes for the identification of the user/object in the move.

Practical implications
– The paper gives a primer how mobile phones with Bluetooth technology, in addition to their basic purpose, can be used as identification devices to enter/exit restricted area.

Originality/value
– The users have possibilities to access restricted area using a common device – a mobile phone with Bluetooth technology. Successful implementation of developed access control system is based on determining the proper value of the Bluetooth signal strength field that extends around the control cabinet in which the Bluetooth devices are situated.