Szent István University

Research Output 1967 2020

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Conference contribution
2017
1 Citation (Scopus)

A focus on high-lycopene tomato cultivars: Horticultural performance and functional quality

Ilahy, R., Siddiqui, M. W., Piro, G., Lenucci, M. S., Hdider, C. & Helyes, L., May 1 2017, 14th International Symposium on Processing Tomato. International Society for Horticultural Science, p. 57-64 8 p. (Acta Horticulturae; vol. 1159).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

lycopene
tomatoes
cultivars
fruits
flavonoids
1 Citation (Scopus)

Application of VIS-NIR reflectance spectra for estimating soluble solid and lycopene content of open-field processing tomato fruit juice from irrigation and mycorrhiza treatments

Szuvandzsiev, P., Daood, H., Posta, K., Helyes, L. & Pék, Z., May 1 2017, 14th International Symposium on Processing Tomato. International Society for Horticultural Science, p. 73-77 5 p. (Acta Horticulturae; vol. 1159).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

tomato juice
fruit juices
lycopene
total soluble solids
mycorrhizae

Influence of colour net shading on quantity and quality of sweet pepper yield

Darázsi Ledóné, H., Pék, Z., Helyes, L. & Szuvandzsiev, P., Jul 31 2017, International Symposium on New Technologies and Management for Greenhouses - GreenSys2015. International Society for Horticultural Science, p. 359-364 6 p. (Acta Horticulturae; vol. 1170).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

sweet peppers
shade
plastics
color
Hungary
5 Citations (Scopus)

Seasonal and irrigation effect on yield parameters and soluble solids content of processing cherry tomato

Pék, Z., Daood, H., Neményi, A., Helyes, L. & Szuvandzsiev, P., May 1 2017, 14th International Symposium on Processing Tomato. International Society for Horticultural Science, p. 45-49 5 p. (Acta Horticulturae; vol. 1159).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

cherry tomatoes
total soluble solids
irrigation
water supply
determinate growth
1 Citation (Scopus)

Simultaneous effect of mycorrhizae and water supply on yield formation of processing tomato

Helyes, L., Pék, Z., Daood, H. & Posta, K., May 1 2017, 14th International Symposium on Processing Tomato. International Society for Horticultural Science, p. 31-35 5 p. (Acta Horticulturae; vol. 1159).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

mycorrhizae
water supply
carotenoids
tomatoes
maturity stage
2015
1 Citation (Scopus)

Application of VIS-NIR reflectance spectra for estimating water supply effect on open field processing tomato

Szuvandzsiev, P., Pék, Z., Szántó, C. & Helyes, L., Apr 30 2015, XIII International Symposium on Processing Tomato. International Society for Horticultural Science, Vol. 1081. p. 191-196 6 p. (Acta Horticulturae; vol. 1081).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

water supply
reflectance
tomatoes
irrigation management
vegetables
2 Citations (Scopus)

Determination of °Brix, lycopene, β-carotene and total carotenoid content of processing tomatoes using near infrared spectroscopy

Deák, K. J., Szigedi, T., Palotás, G., Daood, H. & Helyes, L., Apr 30 2015, XIII International Symposium on Processing Tomato. International Society for Horticultural Science, Vol. 1081. p. 253-258 6 p. (Acta Horticulturae; vol. 1081).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

near-infrared spectroscopy
carotenes
lycopene
brix
carotenoids

Effect of irrigation and increased potassium supply on the yield and nutritive composition of carrot

Ombódi, A., Zalotai, K., Lugasi, A., Boross, F. & Helyes, L., Sep 25 2015, II International Symposium on Horticulture in Europe. International Society for Horticultural Science, Vol. 1099. p. 447-454 8 p. (Acta Horticulturae; vol. 1099).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

carrots
potassium
irrigation
irrigated conditions
carotenes
3 Citations (Scopus)

Effect of mycorrhizae on main antioxidant content of processing tomato

Helyes, L., Pék, Z., Daood, H. & Posta, K., Apr 30 2015, XIII International Symposium on Processing Tomato. International Society for Horticultural Science, Vol. 1081. p. 105-110 6 p. (Acta Horticulturae; vol. 1081).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

mycorrhizae
tomatoes
antioxidants
carotenes
lycopene
4 Citations (Scopus)

Effect of season and irrigation on yield parameters and soluble solids content of processing cherry tomato

Pék, Z., Szuvandzsiev, P., Neményi, A. & Helyes, L., Apr 30 2015, XIII International Symposium on Processing Tomato. International Society for Horticultural Science, Vol. 1081. p. 197-202 6 p. (Acta Horticulturae; vol. 1081).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

cherry tomatoes
total soluble solids
water supply
irrigation
tomatoes
2014
3 Citations (Scopus)

Effect of water supply on yield characteristics of processing Cherry tomato

Szuvandzsiev, P., Helyes, L., Neményi, A. & Pék, Z., Jun 20 2014, Acta Horticulturae. International Society for Horticultural Science, Vol. 1038. p. 587-592 6 p. (Acta Horticulturae; vol. 1038).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

cherry tomatoes
water supply
fruits
tomatoes
fruit yield
7 Citations (Scopus)

Identification of model parameters of the photovoltaic solar cells

Rusirawan, D. & Farkas, I., 2014, 2013 ISES Solar World Congress, SWC 2013. Elsevier Ltd, Vol. 57. p. 39-46 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Identification (control systems)
Solar cells
Photovoltaic cells
Diodes
Amorphous silicon

Oncothermia: Complex therapy by em and fractal physiology

Szász, A., Oct 17 2014, 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014. Institute of Electrical and Electronics Engineers Inc., 6930100

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electromagnetism
Physiology
Energy absorption
Cell death
Nanotechnology
2013
1 Citation (Scopus)

Different water supply and stomatal conductance correlates with yield quantity and quality parameters

Helyes, L., Szuvandzsiev, P., Neményi, A., Pék, Z. & Lugasi, A., Jan 11 2013, Acta Horticulturae. Vol. 971. p. 119-126 8 p. (Acta Horticulturae; vol. 971).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

water supply
stomatal conductance
irrigation
demonstration farms
lycopene
2 Citations (Scopus)

Effect of variety and water supply on phytochemical (phenolics and carotenoids) content and composition of processing tomato

Helyes, L., Neményi, A., Pék, Z., Berki, M. & Daood, H., Jan 11 2013, Acta Horticulturae. Vol. 971. p. 93-98 6 p. (Acta Horticulturae; vol. 971).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

phytopharmaceuticals
water supply
carotenoids
tomatoes
phenols
2 Citations (Scopus)

Statistical methods and weather based decision making in meteorological support for unmanned aerial vehicles (UAVs)

Wantuch, F., Bottyan, Z., Tuba, Z. & Hadobacs, K., 2013, 2013 International Conference on Unmanned Aircraft Systems, ICUAS 2013 - Conference Proceedings. p. 203-207 5 p. 6564691

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Unmanned aerial vehicles (UAV)
Statistical methods
Decision making
Flight paths
Visibility
2012

Changes of colour parameters and antioxidants of vine ripened tomato (Lycopersicon esculentum Mill.) fruits affected by natural light

Pék, Z., Szuvandzsiev, P., Neményi, A., Helyes, L. & Lugasi, A., Aug 31 2012, Acta Horticulturae. Vol. 936. p. 235-240 6 p. (Acta Horticulturae; vol. 936).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solanum lycopersicum var. lycopersicum
vines
solar radiation
tomatoes
antioxidants

Evaluation of calcium deficiency symptoms in sweet pepper (Capsicum annuum L.) fruits via visual plant diagnosis and microscopic examination

Lantos, F., Mike, K., Monostori, T. & Helyes, L., Nov 15 2012, Acta Horticulturae. Vol. 938. p. 283-289 7 p. (Acta Horticulturae; vol. 938).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

sweet peppers
Capsicum annuum
signs and symptoms (plants)
shade
calcium
2 Citations (Scopus)

Tomato antioxidants and yield as affected by different water supply

Helyes, L., Bocs, A., Lugasi, A. & Pék, Z., Aug 31 2012, Acta Horticulturae. Vol. 936. p. 213-218 6 p. (Acta Horticulturae; vol. 936).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

water supply
tomatoes
antioxidants
brix
fruits
2011
6 Citations (Scopus)

Control of fire blight by bacteriophages on apple flowers

Schwarczinger, I., Kiss, E., Süle, S., Tóth, M. & Hevesi, M., May 13 2011, Acta Horticulturae. Vol. 896. p. 457-462 6 p. (Acta Horticulturae; vol. 896).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Erwinia amylovora
bacteriophages
apples
flowers
cultivars

Influence of reflected radiation components on solar collectors

Kocsány, I., Seres, I. & Farkas, I., 2011, 30th ISES Biennial Solar World Congress 2011, SWC 2011. Vol. 4. p. 2610-2615 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solar collectors
Radiation
Solar radiation
Sun
Wavelength

MPPT algorithm effects on the performance of a small scale grid-connected PV array system

Rusirawan, D. & Farkas, I., 2011, 30th ISES Biennial Solar World Congress 2011, SWC 2011. Vol. 2. p. 1438-1449 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electricity
Photovoltaic effects
Electric potential
Amorphous silicon
Sun
2010
1 Citation (Scopus)

Numerical determination of the heat transfer of free standing solar modules

Haber, I. E. & Farkas, I., 2010, Proceedings of the 7th International Conference on Engineering Computational Technology.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Heat transfer coefficients
Heat transfer
Flow fields
Buoyancy
Roofs

Use of computer vision methods for irrigation control

Farkas, I., 2010, IFAC Proceedings Volumes (IFAC-PapersOnline). PART 1 ed. Vol. 3.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Irrigation
Computer vision
Greenhouses
Crops
Cameras
2009

Developing a new energetically-based control method for solar heating systems

Kicsiny, R. & Farkas, I., 2009, 29th ISES Biennial Solar World Congress 2009, ISES 2009. Vol. 1. p. 689-698 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solar heating
Solar energy
Pumps
Costs
Temperature
2008
1 Citation (Scopus)

Development of the heat and mass transfer modell for mixed-flow grain dryer

Mellmann, J., Gottschalk, K. & Farkas, I., 2008, IFAC Proceedings Volumes (IFAC-PapersOnline). 1 PART 1 ed. Vol. 17.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Drying
Mass transfer
Heat transfer
Moisture
Mathematical models

Influence of the time step in ann modelling of thermal stratification of solar storage

Farkas, I., 2008, IFAC Proceedings Volumes (IFAC-PapersOnline). 1 PART 1 ed. Vol. 17.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Thermal stratification
Neural networks
Temperature
Solar radiation
Flow rate
3 Citations (Scopus)

Wilting detection in greenhouse plants by image processing

Font, L. & Farkas, I., 2008, Acta Horticulturae. Vol. 801 PART 1. p. 669-675 7 p. (Acta Horticulturae; vol. 801 PART 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

wilting
image analysis
canopy
greenhouses
pumps
2007

Development of a 10 Kwp photovoltaic system - Efficiency analysis

Seres, I. & Farkas, I., 2007, ISES Solar World Congress 2007, ISES 2007. Vol. 3. p. 1652-1656 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sensors
1 Citation (Scopus)

Different models for determination of thermal stratification in a solar storage tank

Géczy-Víg, P. & Farkas, I., 2007, ISES Solar World Congress 2007, ISES 2007. Vol. 4. p. 2746-2750 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Thermal stratification
Neural networks
Temperature
Solar radiation
Neurons
3 Citations (Scopus)

Integrating MODIS surface reflectance products into the processing of medium and high-resolution satellite images: Difficulties and solutions through two Hungarian case studies

Kristóf, D., Neidert, D., Nagy, Z. & Pintér, K., 2007, Proceedings of MultiTemp 2007 - 2007 International Workshop on the Analysis of Multi-Temporal Remote Sensing Images. 4293059

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Satellites
Imaging techniques
Processing
Time series
Wavelength
1 Citation (Scopus)

Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images: Two Hungarian case studies

Kristof, D., Pataki, R., Neidert, D., Nagy, Z. & Pinter, K., 2007, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6742. 67420J

Research output: Chapter in Book/Report/Conference proceedingConference contribution

MODIS (radiometry)
Satellites
Imaging techniques
radiometric correction
high resolution
25 Citations (Scopus)

Long-term acclimation of plants to elevated CO2 and its interaction with stresses

Tuba, Z. & Lichtenthaler, H. K., Oct 2007, Annals of the New York Academy of Sciences. Vol. 1113. p. 135-146 12 p. (Annals of the New York Academy of Sciences; vol. 1113).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Acclimatization
Temperature
Photosynthesis
Drought
Carbon Monoxide

Potentials of renewable energy resources in Hungary

Imre, L. & Farkas, I., 2007, ISES Solar World Congress 2007, ISES 2007. Vol. 4. p. 2868-2872 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Renewable energy resources
Solar energy
Geothermal energy
Wind power
Biomass

Sizing aspects of a small scale grid connected PV system

Bartha, S., Farkas, I., Teodoreanu, D. I., Seres, I., Teodoreanu, M. & Negreanu, C., 2007, ISES Solar World Congress 2007, ISES 2007. Vol. 3. p. 1661-1665 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Energy balance
Solar radiation
Software packages
Monitoring
Air
2006
12 Citations (Scopus)

Effect of the variety and growing methods as well as cultivation conditions on the composition of tomato (Lycopersicon lycopersicum (L.) karsten) fruit

Helyes, L., Dimény, J., Pék, Z. & Lugasi, A., Jun 2006, Acta Horticulturae. Vol. 712 I. p. 511-516 6 p. (Acta Horticulturae; vol. 712 I).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solanum lycopersicum var. lycopersicum
tomatoes
fruits
brix
lycopene

Effects of modified carbohydrate content on the development and growth of carnation (Dianthus caryophyllus L.)

Szoke, A., Kiss, E., Kerepesi, I., Toldi, O. & Heszky, L., Nov 2006, Acta Horticulturae. Vol. 725 II. p. 807-810 4 p. (Acta Horticulturae; vol. 725 II).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dianthus caryophyllus
carbohydrate content
fructose
growth and development
6-phosphofructo-2-kinase

Genotype identification of onion (Allium cepa L.) cultivars

Bittsánszky, A., Gyulai, G., Gajdos, L., Szabó, Z., Juhász, A. G., Kiss, J., Lagler, R. & Heszky, L., Nov 2006, Acta Horticulturae. Vol. 725 II. p. 699-701 3 p. (Acta Horticulturae; vol. 725 II).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Allium cepa
onions
genotype
cultivars
genetic background
8 Citations (Scopus)

How can different cytokinins influence the process of shoot regeneration from apple leaves in 'Royal Gala' and 'M.26'

Dobránszki, J., Hudák, I., Magyar-Tábori, K., Galli, Z., Kiss, E. & Jámbor-Benczúr, E., Nov 2006, Acta Horticulturae. Vol. 725 I. p. 191-196 6 p. (Acta Horticulturae; vol. 725 I).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

cytokinins
apples
shoots
leaves
explants

Identification of genes involved in ripening of octoploid strawberry (Fragaria x ananassa Duch.) using cDNA-AFLP

Balogh, A., Kiss, E., Koncz, T. & Heszky, L., Nov 2006, Acta Horticulturae. Vol. 725 II. p. 635-641 7 p. (Acta Horticulturae; vol. 725 II).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fragaria ananassa
strawberries
amplified fragment length polymorphism
ripening
ethylene

Political and social statistics geodatabase

Mészáros, J., Szakadát, I., Speiser, F. & Solymosi, N., 2006, Proceedings 2006 - The 9th AGILE International Conference on Geographic Information Science: "Shaping the Future of Geographic Information Science in Europe", AGILE 2006. p. 332-338 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

social statistics
Statistics
statistics
1 Citation (Scopus)

Using SSR markers to distinguish apple cultivars

Galli, Z., Halász, G., Kiss, E., Dobránszki, J. & Heszky, L., Nov 2006, Acta Horticulturae. Vol. 725 II. p. 669-672 4 p. (Acta Horticulturae; vol. 725 II).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

apples
microsatellite repeats
cultivars
genetic markers
breeding methods
2005
1 Citation (Scopus)

A 10 kWp photovoltaic grid connected system planning and checking the system components

Farkas, I., Seres, I. & Kocsis, L., 2005, Proceedings of the Solar World Congress 2005: Bringing Water to the World, Including Proceedings of 34th ASES Annual Conference and Proceedings of 30th National Passive Solar Conference. Vol. 2. p. 1295-1300 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Planning
Solar radiation
Amorphous silicon
Demonstrations
Crystalline materials

Air speed sensor for measuring natural convection in dryers and storehouses

Seres, I., Kocsis, L., Gottschalk, K. & Farkas, I., 2005, IFAC Proceedings Volumes (IFAC-PapersOnline). Vol. 16. p. 57-62 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Driers (materials)
Natural convection
Sensors
Air
Quality control

Down regulation of ethylene production and softening in 'McIntosh' apples

Hrazdina, G., Hemmat, M., Kiss, E., Galli, Z., Aldwinckle, H. S. & Rosenfield, C. L., 2005, Acta Horticulturae. Vol. 682. p. 383-388 6 p. (Acta Horticulturae; vol. 682).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

ethylene production
apples
ethylene
ripening
fruits
4 Citations (Scopus)

Leaf inclination based non destructive water stress indication for vegetables

Font, L., Korösi, F. & Farkas, I., 2005, Acta Horticulturae. Vol. 691. p. 99-106 8 p. (Acta Horticulturae; vol. 691).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

water stress
vegetables
stems
canopy
petioles
2 Citations (Scopus)

Optical measuring system for water stress indication of tomato plants

Font, L., Korösi, F. & Farkas, I., 2005, Acta Horticulturae. Vol. 691. p. 781-788 8 p. (Acta Horticulturae; vol. 691).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

water stress
tomatoes
leaves
stems
computer vision
2004

Characterization of grapevine cultivars autochthonous in the carpathian basin with microsatellites

Veres, A., Balogh, A., Kiss, E., Szoke, A., Heszky, L., Kozma, P., Kocsis, M., Kiss, E., Galli, Z. & Heszky, L., Jul 5 2004, Acta Horticulturae. Vol. 652. p. 467-470 4 p. (Acta Horticulturae; vol. 652).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

microsatellite repeats
basins
cultivars
gene banks
alleles
2003
16 Citations (Scopus)

Appreciation and analysis of lycopene content of tomato

Helyes, L., Brandt, S., Réti, K., Barna, E. & Lugasi, A., Jul 1 2003, Acta Horticulturae. Vol. 604. p. 531-537 7 p. (Acta Horticulturae; vol. 604).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

lycopene
tomatoes
tomato products
antioxidants
beta-carotene
8 Citations (Scopus)

Down regulation of ethylene production in 'royal gala' apples

Hrazdina, G., Kiss, E., Galli, Z., Rosenfield, C., Norelli, J. L. & Aldwinckle, H. S., Dec 12 2003, Acta Horticulturae. Vol. 628. p. 239-251 13 p. (Acta Horticulturae; vol. 628).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

ethylene production
apples
ethylene
fruits
ripening