TY  - CONF
AU  - Jovanović, Nemanja
AU  - Zlatanović, Ivan
AU  - Simonović, Vojislav
AU  - Rudonja, Nedžad
AU  - Nedić, Nebojša
AU  - Firfiris, Vasileios
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7754
AB  - The widely recognized insect known as the honey bee (Apis mellifera)
has a beneficial impact on both the environment and human life, making it important to
protect them not just for ecological reasons but also for the economic and social
advancement of countryside regions. Their existence is so essential that the recent
decrease in honey bee hives has caused a growing interest in them. One of the reasons
for bees' decline in population is infestation with a parasite known as Varroa
destructor. In order to effectively treat the V. destructor infestation, it is critical to
monitor the amount of infestation in hives. While there is at present no specific sensor
for this job, continuous and discrete monitoring of hive infection levels as well as other
critical bee colony characteristics, such as temperature and humidity, is wanted. The
use of chemicals by apiarists is a method of controlling the infestation that is the most
common strategy. Substitute tactics include the use of organic compounds, organic
products like essential oils, and biotechnological techniques like mite trapping.
Therefore, successful therapy and preventing harsh chemical use can reduce bee
mortality and economic losses.
PB  - University of Belgrade, Faculty of Agriculture, Serbia.
C3  - Proceedings of The Sixth International Symposium on Agricultural Engineering ISAE-2023
T1  - REVIEW PAPER ON VARROA INFESTATION, DETECTION AND PREVENTION IN BEEHIVES
EP  - 51
SP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7754
ER  - 

@conference{
author = "Jovanović, Nemanja and Zlatanović, Ivan and Simonović, Vojislav and Rudonja, Nedžad and Nedić, Nebojša and Firfiris, Vasileios",
year = "2023",
abstract = "The widely recognized insect known as the honey bee (Apis mellifera)
has a beneficial impact on both the environment and human life, making it important to
protect them not just for ecological reasons but also for the economic and social
advancement of countryside regions. Their existence is so essential that the recent
decrease in honey bee hives has caused a growing interest in them. One of the reasons
for bees' decline in population is infestation with a parasite known as Varroa
destructor. In order to effectively treat the V. destructor infestation, it is critical to
monitor the amount of infestation in hives. While there is at present no specific sensor
for this job, continuous and discrete monitoring of hive infection levels as well as other
critical bee colony characteristics, such as temperature and humidity, is wanted. The
use of chemicals by apiarists is a method of controlling the infestation that is the most
common strategy. Substitute tactics include the use of organic compounds, organic
products like essential oils, and biotechnological techniques like mite trapping.
Therefore, successful therapy and preventing harsh chemical use can reduce bee
mortality and economic losses.",
publisher = "University of Belgrade, Faculty of Agriculture, Serbia.",
journal = "Proceedings of The Sixth International Symposium on Agricultural Engineering ISAE-2023",
title = "REVIEW PAPER ON VARROA INFESTATION, DETECTION AND PREVENTION IN BEEHIVES",
pages = "51-44",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7754"
}

Jovanović, N., Zlatanović, I., Simonović, V., Rudonja, N., Nedić, N.,& Firfiris, V.. (2023). REVIEW PAPER ON VARROA INFESTATION, DETECTION AND PREVENTION IN BEEHIVES. in Proceedings of The Sixth International Symposium on Agricultural Engineering ISAE-2023
University of Belgrade, Faculty of Agriculture, Serbia.., 44-51.
https://hdl.handle.net/21.15107/rcub_machinery_7754

Jovanović N, Zlatanović I, Simonović V, Rudonja N, Nedić N, Firfiris V. REVIEW PAPER ON VARROA INFESTATION, DETECTION AND PREVENTION IN BEEHIVES. in Proceedings of The Sixth International Symposium on Agricultural Engineering ISAE-2023. 2023;:44-51.
https://hdl.handle.net/21.15107/rcub_machinery_7754 .

Jovanović, Nemanja, Zlatanović, Ivan, Simonović, Vojislav, Rudonja, Nedžad, Nedić, Nebojša, Firfiris, Vasileios, "REVIEW PAPER ON VARROA INFESTATION, DETECTION AND PREVENTION IN BEEHIVES" in Proceedings of The Sixth International Symposium on Agricultural Engineering ISAE-2023 (2023):44-51,
https://hdl.handle.net/21.15107/rcub_machinery_7754 .

TY  - CONF
AU  - Zlatanović, Ivan
AU  - Simonović, Vojislav
AU  - Rudonja, Nedžad
AU  - Firfiris, Vasileios
AU  - Marković, Dragan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5028
AB  - Ultrasonics is new science that is being intensively developed in recent years. Sound velocity is a valuable engineering tool and non-destructive, non-invasive, non-intrusive technique of measurement.  The authors were highly motivated to collect data from as many research papers as possible in order to see the possibilities and examples of applying this technology. The various effects of ultrasound were discussed and outlined in a context of different uses to accelerate or support agricultural production processes like: the effects of ultrasound waves, the commercial and diagnostical applications possibilities. The field of biotechnical engineering is very multidisciplinary and, accordingly, there is a diversity in approaches and possibilities of applying ultrasound. The overall conclusion of our work is that the use of ultrasound in biotechnical research brings various benefits, and in some cases, it is extremely supported and recommended. Also, there is great flexibility in the ways in which this technology can be applied, which leaves engineers a lot of freedom in expressing creative solutions and applications.
PB  - Department of Mechanical Sciences, Rajalakshmi Engineering College
C3  - The International Conference on Energy, Smart Structure and Manufacturing - ICESSM2022
T1  - Technical review on the applications of ultrasound in the engineering of  biotechnical systems
SP  - Paper ID: ICESSM-021-EI
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5028
ER  - 

@conference{
author = "Zlatanović, Ivan and Simonović, Vojislav and Rudonja, Nedžad and Firfiris, Vasileios and Marković, Dragan",
year = "2022",
abstract = "Ultrasonics is new science that is being intensively developed in recent years. Sound velocity is a valuable engineering tool and non-destructive, non-invasive, non-intrusive technique of measurement.  The authors were highly motivated to collect data from as many research papers as possible in order to see the possibilities and examples of applying this technology. The various effects of ultrasound were discussed and outlined in a context of different uses to accelerate or support agricultural production processes like: the effects of ultrasound waves, the commercial and diagnostical applications possibilities. The field of biotechnical engineering is very multidisciplinary and, accordingly, there is a diversity in approaches and possibilities of applying ultrasound. The overall conclusion of our work is that the use of ultrasound in biotechnical research brings various benefits, and in some cases, it is extremely supported and recommended. Also, there is great flexibility in the ways in which this technology can be applied, which leaves engineers a lot of freedom in expressing creative solutions and applications.",
publisher = "Department of Mechanical Sciences, Rajalakshmi Engineering College",
journal = "The International Conference on Energy, Smart Structure and Manufacturing - ICESSM2022",
title = "Technical review on the applications of ultrasound in the engineering of  biotechnical systems",
pages = "Paper ID: ICESSM-021-EI",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5028"
}

Zlatanović, I., Simonović, V., Rudonja, N., Firfiris, V.,& Marković, D.. (2022). Technical review on the applications of ultrasound in the engineering of  biotechnical systems. in The International Conference on Energy, Smart Structure and Manufacturing - ICESSM2022
Department of Mechanical Sciences, Rajalakshmi Engineering College., Paper ID: ICESSM-021-EI.
https://hdl.handle.net/21.15107/rcub_machinery_5028

Zlatanović I, Simonović V, Rudonja N, Firfiris V, Marković D. Technical review on the applications of ultrasound in the engineering of  biotechnical systems. in The International Conference on Energy, Smart Structure and Manufacturing - ICESSM2022. 2022;:Paper ID: ICESSM-021-EI.
https://hdl.handle.net/21.15107/rcub_machinery_5028 .

Zlatanović, Ivan, Simonović, Vojislav, Rudonja, Nedžad, Firfiris, Vasileios, Marković, Dragan, "Technical review on the applications of ultrasound in the engineering of  biotechnical systems" in The International Conference on Energy, Smart Structure and Manufacturing - ICESSM2022 (2022):Paper ID: ICESSM-021-EI,
https://hdl.handle.net/21.15107/rcub_machinery_5028 .

TY  - CONF
AU  - Zlatanović, Ivan
AU  - Nedić, Nebojša
AU  - Sekar, Subramani
AU  - Simonović, Vojislav
AU  - Firfiris, Vasileios
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5039
AB  - Bee pollen provides proteins, lipids, vitamins and minerals in bee nutrition. Bee 
pollen also has a significant nutritive value as a supplement to human nutrition. Fresh bee pollen 
must be dried in order to reduce water activity for the development of various microorganisms. 
Convective drying is common method for bee pollen dehydration. In this paper, several drying 
temperatures (40, 50 and 60◦C) were investigated during the 3 hours convective hot air drying. 
Several drying models used in literature were fitted to experimentally obtained drying curves in 
order to find most suitable one. The best fit was achieved with Two-term (for 60◦C) and Hii et al. 
(for 40◦C and 50◦C) drying models. The coefficient of determination was the primary criterion for 
selecting the best model to describe the drying curves.
PB  - University of Belgrade, Faculty of Agriculture, The Institute for Agricultural Engineering
C3  - The Fifth International Symposium on Agricultural Engineering - ISAE-2021, Proceedings
T1  - Modeling the thin-layer drying of bee pollen
EP  - III-114
SP  - III-109
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5039
ER  - 

@conference{
author = "Zlatanović, Ivan and Nedić, Nebojša and Sekar, Subramani and Simonović, Vojislav and Firfiris, Vasileios",
year = "2021",
abstract = "Bee pollen provides proteins, lipids, vitamins and minerals in bee nutrition. Bee 
pollen also has a significant nutritive value as a supplement to human nutrition. Fresh bee pollen 
must be dried in order to reduce water activity for the development of various microorganisms. 
Convective drying is common method for bee pollen dehydration. In this paper, several drying 
temperatures (40, 50 and 60◦C) were investigated during the 3 hours convective hot air drying. 
Several drying models used in literature were fitted to experimentally obtained drying curves in 
order to find most suitable one. The best fit was achieved with Two-term (for 60◦C) and Hii et al. 
(for 40◦C and 50◦C) drying models. The coefficient of determination was the primary criterion for 
selecting the best model to describe the drying curves.",
publisher = "University of Belgrade, Faculty of Agriculture, The Institute for Agricultural Engineering",
journal = "The Fifth International Symposium on Agricultural Engineering - ISAE-2021, Proceedings",
title = "Modeling the thin-layer drying of bee pollen",
pages = "III-114-III-109",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5039"
}

Zlatanović, I., Nedić, N., Sekar, S., Simonović, V.,& Firfiris, V.. (2021). Modeling the thin-layer drying of bee pollen. in The Fifth International Symposium on Agricultural Engineering - ISAE-2021, Proceedings
University of Belgrade, Faculty of Agriculture, The Institute for Agricultural Engineering., III-109-III-114.
https://hdl.handle.net/21.15107/rcub_machinery_5039

Zlatanović I, Nedić N, Sekar S, Simonović V, Firfiris V. Modeling the thin-layer drying of bee pollen. in The Fifth International Symposium on Agricultural Engineering - ISAE-2021, Proceedings. 2021;:III-109-III-114.
https://hdl.handle.net/21.15107/rcub_machinery_5039 .

Zlatanović, Ivan, Nedić, Nebojša, Sekar, Subramani, Simonović, Vojislav, Firfiris, Vasileios, "Modeling the thin-layer drying of bee pollen" in The Fifth International Symposium on Agricultural Engineering - ISAE-2021, Proceedings (2021):III-109-III-114,
https://hdl.handle.net/21.15107/rcub_machinery_5039 .

TY  - CONF
AU  - Firfiris, Vasileios
AU  - Martzopoulou, Anastasia
AU  - Zlatanović, Ivan
AU  - Kostopoulos, Thomas
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5040
AB  - Η χρήση απορριπτόμενης θερμότητας από μονάδες παραγωγής ηλεκτρικής ενέργειας μεγάλης κλίμακας έχει αξιοποιηθεί διαχρονικά για τη θέρμανση θερμοκηπίων με δίκτυα τηλεθέρμανσης. Τα τελευταία χρόνια εγκαθίστανται και λειτουργούν μονάδες συμπαραγωγής ηλεκτρικής ενέργειας και θερμότητας μικρής δυναμικότητας, όπου η αποκρυπτόμενη θερμική ενέργεια και το CO2, αξιοποιούνται ώστε να υποστηρίξουν τις ανάγκες θερμοκηπίων σε θέρμανση και να βοηθήσουν στην ανάπτυξη της καλλιέργειας. Οι μονάδες συμπαραγωγής που χρησιμοποιούνται, είναι μονάδες αεριοστρόβιλων που λειτουργούν υπό τον θερμοδυναμικό κύκλο Brayton. Στη συγκεκριμένη εργασία εξετάζεται η αξιοποίηση μικρών μονάδων που λειτουργούν με ατμοστροβίλους, υπό τον θερμοδυναμικό κύκλο Rankine και εξετάζεται η συνεισφορά που μπορεί να έχουν τόσο στις θερμικές ανάγκες όσο και στο απαραίτητο CO2  των θερμοκηπίων.
PB  - Hellenic Society of Agriculture Engineers
C3  - 12th Conference of the Hellenic Society of Agriculture Engineers - EGME 2021, Proceedings “Praktika 2021”
T1  - Theoretical evaluation of steam chp system for covering the heating energy needs of a greenhouse through waste heat and CO2 needs through the combustion exhaust
EP  - 382
SP  - 375
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5040
ER  - 

@conference{
author = "Firfiris, Vasileios and Martzopoulou, Anastasia and Zlatanović, Ivan and Kostopoulos, Thomas",
year = "2021",
abstract = "Η χρήση απορριπτόμενης θερμότητας από μονάδες παραγωγής ηλεκτρικής ενέργειας μεγάλης κλίμακας έχει αξιοποιηθεί διαχρονικά για τη θέρμανση θερμοκηπίων με δίκτυα τηλεθέρμανσης. Τα τελευταία χρόνια εγκαθίστανται και λειτουργούν μονάδες συμπαραγωγής ηλεκτρικής ενέργειας και θερμότητας μικρής δυναμικότητας, όπου η αποκρυπτόμενη θερμική ενέργεια και το CO2, αξιοποιούνται ώστε να υποστηρίξουν τις ανάγκες θερμοκηπίων σε θέρμανση και να βοηθήσουν στην ανάπτυξη της καλλιέργειας. Οι μονάδες συμπαραγωγής που χρησιμοποιούνται, είναι μονάδες αεριοστρόβιλων που λειτουργούν υπό τον θερμοδυναμικό κύκλο Brayton. Στη συγκεκριμένη εργασία εξετάζεται η αξιοποίηση μικρών μονάδων που λειτουργούν με ατμοστροβίλους, υπό τον θερμοδυναμικό κύκλο Rankine και εξετάζεται η συνεισφορά που μπορεί να έχουν τόσο στις θερμικές ανάγκες όσο και στο απαραίτητο CO2  των θερμοκηπίων.",
publisher = "Hellenic Society of Agriculture Engineers",
journal = "12th Conference of the Hellenic Society of Agriculture Engineers - EGME 2021, Proceedings “Praktika 2021”",
title = "Theoretical evaluation of steam chp system for covering the heating energy needs of a greenhouse through waste heat and CO2 needs through the combustion exhaust",
pages = "382-375",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5040"
}

Firfiris, V., Martzopoulou, A., Zlatanović, I.,& Kostopoulos, T.. (2021). Theoretical evaluation of steam chp system for covering the heating energy needs of a greenhouse through waste heat and CO2 needs through the combustion exhaust. in 12th Conference of the Hellenic Society of Agriculture Engineers - EGME 2021, Proceedings “Praktika 2021”
Hellenic Society of Agriculture Engineers., 375-382.
https://hdl.handle.net/21.15107/rcub_machinery_5040

Firfiris V, Martzopoulou A, Zlatanović I, Kostopoulos T. Theoretical evaluation of steam chp system for covering the heating energy needs of a greenhouse through waste heat and CO2 needs through the combustion exhaust. in 12th Conference of the Hellenic Society of Agriculture Engineers - EGME 2021, Proceedings “Praktika 2021”. 2021;:375-382.
https://hdl.handle.net/21.15107/rcub_machinery_5040 .

Firfiris, Vasileios, Martzopoulou, Anastasia, Zlatanović, Ivan, Kostopoulos, Thomas, "Theoretical evaluation of steam chp system for covering the heating energy needs of a greenhouse through waste heat and CO2 needs through the combustion exhaust" in 12th Conference of the Hellenic Society of Agriculture Engineers - EGME 2021, Proceedings “Praktika 2021” (2021):375-382,
https://hdl.handle.net/21.15107/rcub_machinery_5040 .

TY  - CONF
AU  - Bošković, Biljana
AU  - Pajić, Miloš
AU  - Zlatanović, Ivan
AU  - Dražić, Milan
AU  - Gligorević, Kosta
AU  - Firfiris, Vasileios
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5044
AB  - The successful implementation of chemical protection depends on two main factors. 
The first factor relates to the selection of the compound and its application in adequate time, while 
the second factor relates to the technical functionality of the parts of the machines used for the 
application of the protective liquid, i.e. the nozzle. The technical functionality of the sprayer 
elements, the proper tuning (calibration) and the correct selection of the nozzle all have a great 
influence on the proper functionality of the sprayer elements. The proper technical functionality of 
the sprayer is a prerequisite for the effective application of the protective liquid, for the financial 
savings and the environmental protection as well as. In our practice, a particular problem is the fact 
that agricultural producers do not perform regular annual controls on both the nozzles themselves 
and the other elements of the sprayers.
This paper presents a comparative analysis of several types of sprayers, which have the same 
type of nozzles, but with different factory declared flow. 25 sprayers were tested and divided into 
four groups according to the exploitation period. In the first group of sprayers the nozzles were 
within the factory declared flow rate (100% correct), while the fourth group of sprayers had half of 
the nozzles (50% defective) for replacement. This research shows that the length of the exploitation significantly influences on the technical functionality of the sprayers. In order for as many sprayers as possible to meet the technical standards of EN 13790 to be applied in practice, it is necessary to regularly check the technical functionality of the nozzles, and all other elements of the sprayers by the users themselves, and periodically also by the authorized laboratories.
PB  - Belgrade : Central Institute of Conservation
C3  - The Third International Student Scientific Conference "Multidisciplinary Approach to Contemporary Research", Proceedings
T1  - The influence of the exploitation period on the proper operation of nozzels – the constituent element of orchard sprayers
EP  - 61
SP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5044
ER  - 

@conference{
author = "Bošković, Biljana and Pajić, Miloš and Zlatanović, Ivan and Dražić, Milan and Gligorević, Kosta and Firfiris, Vasileios",
year = "2019",
abstract = "The successful implementation of chemical protection depends on two main factors. 
The first factor relates to the selection of the compound and its application in adequate time, while 
the second factor relates to the technical functionality of the parts of the machines used for the 
application of the protective liquid, i.e. the nozzle. The technical functionality of the sprayer 
elements, the proper tuning (calibration) and the correct selection of the nozzle all have a great 
influence on the proper functionality of the sprayer elements. The proper technical functionality of 
the sprayer is a prerequisite for the effective application of the protective liquid, for the financial 
savings and the environmental protection as well as. In our practice, a particular problem is the fact 
that agricultural producers do not perform regular annual controls on both the nozzles themselves 
and the other elements of the sprayers.
This paper presents a comparative analysis of several types of sprayers, which have the same 
type of nozzles, but with different factory declared flow. 25 sprayers were tested and divided into 
four groups according to the exploitation period. In the first group of sprayers the nozzles were 
within the factory declared flow rate (100% correct), while the fourth group of sprayers had half of 
the nozzles (50% defective) for replacement. This research shows that the length of the exploitation significantly influences on the technical functionality of the sprayers. In order for as many sprayers as possible to meet the technical standards of EN 13790 to be applied in practice, it is necessary to regularly check the technical functionality of the nozzles, and all other elements of the sprayers by the users themselves, and periodically also by the authorized laboratories.",
publisher = "Belgrade : Central Institute of Conservation",
journal = "The Third International Student Scientific Conference "Multidisciplinary Approach to Contemporary Research", Proceedings",
title = "The influence of the exploitation period on the proper operation of nozzels – the constituent element of orchard sprayers",
pages = "61-56",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5044"
}

Bošković, B., Pajić, M., Zlatanović, I., Dražić, M., Gligorević, K.,& Firfiris, V.. (2019). The influence of the exploitation period on the proper operation of nozzels – the constituent element of orchard sprayers. in The Third International Student Scientific Conference "Multidisciplinary Approach to Contemporary Research", Proceedings
Belgrade : Central Institute of Conservation., 56-61.
https://hdl.handle.net/21.15107/rcub_machinery_5044

Bošković B, Pajić M, Zlatanović I, Dražić M, Gligorević K, Firfiris V. The influence of the exploitation period on the proper operation of nozzels – the constituent element of orchard sprayers. in The Third International Student Scientific Conference "Multidisciplinary Approach to Contemporary Research", Proceedings. 2019;:56-61.
https://hdl.handle.net/21.15107/rcub_machinery_5044 .

Bošković, Biljana, Pajić, Miloš, Zlatanović, Ivan, Dražić, Milan, Gligorević, Kosta, Firfiris, Vasileios, "The influence of the exploitation period on the proper operation of nozzels – the constituent element of orchard sprayers" in The Third International Student Scientific Conference "Multidisciplinary Approach to Contemporary Research", Proceedings (2019):56-61,
https://hdl.handle.net/21.15107/rcub_machinery_5044 .