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001-es BibID:	BIBFORM092261
Első szerző:	Gere Attila
Cím:	Applying parallel factor analysis and Tucker-3 methods on sensory and instrumental data to establish preference maps: case study on sweet corn varieties / Gere Attila, Losó Viktor, Györey Annamária, Kovács Sándor, Huzsvai László, Nábrádi András, Kókai Zoltán, Sipos László
Dátum:	2014
ISSN:	0022-5142
Megjegyzések:	BACKGROUND: Traditional internal and external preferencemappingmethods are based on principal component analysis (PCA). However, parallel factor analysis (PARAFAC) and Tucker-3 methods could be a better choice. To evaluate the methods, preference maps of sweet corn varieties will be introduced. RESULTS; A preference map of eight sweet corn varieties was established using PARAFAC and Tucker-3 methods. Instrumental data were also integrated into the maps. The triplot created by the PARAFAC model explains better how odour is separated from texture or appearance, and how some varieties are separated from others. CONCLUSION: Internal and external preference maps were created using parallel factor analysis (PARAFAC) and Tucker-3 models employing both sensory (trained panel and consumers) and instrumental parameters simultaneously. Triplots of the applied three-way models have a competitive advantage compared to the traditional biplots of the PCA-based external preference maps. The solution of PARAFAC and Tucker-3 is very similar regarding the interpretation of the first and third factors. The main difference is due to the second factor as it differentiated the attributes better. Consumers who prefer ♭super sweet' varieties (they place great emphasis especially on taste) are much younger and have significantly higher incomes, and buy sweet corn products rarely (once a month). Consumers who consume sweet corn products mainly because of their texture and appearance are significantly older and include a higher ratio of men.
Tárgyszavak:	Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk preference mapping algorithm parallel factor analysis Tucker-3 sensory analysis sweet corn
Megjelenés:	Journal Of The Science Of Food And Agriculture. - 94 : 15 (2014), p. 3213-3225. -
További szerzők:	Losó Viktor Györey Annamária Kovács Sándor (1978-) (matematika tanár) Huzsvai László (1961-) (talajerőgazdálkodási szakmérnök, agrármérnök) Nábrádi András (1956-) (közgazdász, agrárökonómus) Kókai Zoltán Sipos László (agrár)
Pályázati támogatás:	TÁMOP 4.2.1.B-09/1/KMR-2010-005 TÁMOP
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001-es BibID:	BIBFORM115648
035-os BibID:	(Cikkazonosító)15310
Első szerző:	Kovács Tünde Zita (közgazdász)
Cím:	Sustainable public transportation in a Volatile, Uncertain, Complex, and Ambiguous (VUCA) age / Tünde Zita Kovács, András Nábrádi, Szabolcs Tóth, László Huzsvai, Adrián Nagy, Beáta Bittner
Dátum:	2023
ISSN:	2071-1050
Megjegyzések:	A well-functioning public transport system is one of the foundations of the Smart city concept and sustainable cities. The COVID period offers an excellent opportunity to examine the impact of different factors, because throughout this period society was faced with both health and governmental impacts that had different effects. Public transport use in the EU member states from the turn of the millennium until the beginning of the pandemic ranged from 17-18% to 27% of total journeys. The COVID-19 virus caused a 5-7% decrease in public transport use. The present study analyses the relationship between these effects and the number of paying passengers on public transport in Debrecen. Four hypotheses were put forward, i.e., that (1) the evolution of travel tickets, (2) general passes, (3) discounted passes and (4) replacement tickets were influenced by the evolution of the active COVID-19 case rate. The data were collected from the Debrecen Transport Company (DKV) for the period 1 January 2020-12 December 2021, and the Worldometers.info database. Statistical analyses were performed using an autoregressive and moving average (ARMA) model. We found that COVID`s active case numbers did not affect sales, but some of the government measures did have an effect. The results of this research can be used to inform future decisions to maintain and improve urban transport.
Tárgyszavak:	Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk public transportation ARMA model government measures COVID-19 effects transportation analysis
Megjelenés:	Sustainability. - 15 : 21 (2023), p. 1-15. -
További szerzők:	Nábrádi András (1956-) (közgazdász, agrárökonómus) Tóth Szabolcs (1973-) (közgazdász) Huzsvai László (1961-) (talajerőgazdálkodási szakmérnök, agrármérnök) Nagy Adrián Szilárd (1975-) (gazdasági agrármérnök) Bittner Beáta (1980-) (közgazdász)
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001-es BibID:	BIBFORM100362
035-os BibID:	(cikkazonosító)613 (WoS)000769116000001 (Scopus)85124956810
Első szerző:	Kovács Tünde Zita (közgazdász)
Cím:	Convergence and the Matthew Effect in the European Union Based on the DESI Index / Kovács Tünde Zita, Bittner Beáta, Huzsvai László, Nábrádi András
Dátum:	2022
ISSN:	2227-7390
Megjegyzések:	The European Commission (EC) has monitored Member States' digital progress through the Digital Economy and Society Index (DESI) since 2014. The DESI index currently ranks the EU Member States and monitors their progress based on four core and 33 individual indicators. We sought to determine whether convergence between the Member States could be detected using the DESI's annual databases. By examining the variation in the indices, we propose the existence of a so-called "Matthew effect", i.e., the "rich get richer" syndrome among the 27 EU Member States. We also hypothesised that the COVID-19 pandemic would influence the change in the DESI. Issues investigated were those using bibliometric, statistical-mathematical methods. The ?-convergence analysis was used to estimate the reduction over time of the differences between the Member States, while the ?-convergence analysis was used to estimate the rate of catching up with the initial level of development. A PCA analysis was performed to verify the Mathew effect with additional ?-variances considering real GDP per capita change. The ?-convergence was confirmed over the period 2016?2021. The ?-convergence was significantly confirmed, and the research also revealed that the half-life of catching up is approximately 20 years. The suggestion of a Matthew effect in the 2016?2021 period, although not significantly confirmed, tends to suggest its existence. The COVID-19 pandemic's impact on the value of the DESI index is likely to be affected, but future studies are needed to find support for this hypothesis. The study concludes that convergence between the EU-27 Member States can be detected based on the DESI, but this does not imply convergence for all four core DESI indicators.
Tárgyszavak:	Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk digital economy economic growth digital transformation rich get richer convergence
Megjelenés:	Mathematics. - 10 : 4 (2022), p. 1-23. -
További szerzők:	Bittner Beáta (1980-) (közgazdász) Huzsvai László (1961-) (talajerőgazdálkodási szakmérnök, agrármérnök) Nábrádi András (1956-) (közgazdász, agrárökonómus)
Pályázati támogatás:	EFOP-3.6.3-VEKOP-16-2017-00007 EFOP
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