@article{MTMT:34754252,
	title = {Changes in the crop world market: what will be the food supply without the russia-ukraine war?},
	url = {https://m2.mtmt.hu/api/publication/34754252},
	author = {WU, YUE and Hanka, László and Takácsné György, Katalin},
	journal-iso = {BIZTONSÁGTUD SZLE},
	journal = {BIZTONSÁGTUDOMÁNYI SZEMLE},
	volume = {6},
	unique-id = {34754252},
	abstract = {A 2007/2008-as élelmiszerválságot követően a COVID-19 járvány után a világ a folyamatban levő orosz-ukrán háború idején szenvedi el ismét egy élelmiszer válság következményeit. A háború két résztvevő országa a világ alapvető élelmiszer ellátója. A kialakult élelmiszer krízis is mutatja a háború negatív hatásait. Ebben a kutatásban arra törekedtünk, hogy megjósoljuk Ukrajnában a fő terményexport mennyiségét a 2022-től (a háború kitörésének évétől) 2024-ig tartó időszakra. Kutatási módszertanként idősoros elemzést és az elemzés elvégzéséhez pedig Matlab szoftvert használtunk. Azt találtuk, hogy Oroszország és Ukrajna a becslések szerint egyre fontosabb szerepet fog játszani a világ élelmiszerellátásában a búza, a kukorica, az árpa és a napraforgómag tekintetében. Kína szerepe a búza-, kukorica- és árpaexportban az előrejelzések szerint csökkenni fog, de a napraforgómag export növekedni fog. Ez a kutatási eredmény szilárd alapja lehet annak a jövőbeni összehasonlító vizsgálatnak is, amely az orosz-ukrán háború világ élelmiszerellátására gyakorolt hatását vizsgálja.},
	keywords = {gabonaexport; élelmiszer biztonság; orosz-ukrán háború; élelmiszerellátás; idősor analízis},
	year = {2024},
	eissn = {2676-9042},
	pages = {9-26}
}

@article{MTMT:34729383,
	title = {Conceptual distance and algebras of concepts},
	url = {https://m2.mtmt.hu/api/publication/34729383},
	author = {Khaled, Mohamed and Székely, Gergely},
	doi = {10.1017/S1755020324000029},
	journal-iso = {REV SYMB LOGIC},
	journal = {REVIEW OF SYMBOLIC LOGIC},
	volume = {Published online by Cambridge University Press: 22 February 2024},
	unique-id = {34729383},
	issn = {1755-0203},
	abstract = {We show that the conceptual distance between any two theories of first-order logic is the same as the generator distance between their Lindenbaum–Tarski algebras of concepts. As a consequence of this, we show that, for any two arbitrary mathematical structures, the generator distance between their meaning algebras (also known as cylindric set algebras) is the same as the conceptual distance between their first-order logic theories. As applications, we give a complete description for the distances between meaning algebras corresponding to structures having at most three elements and show that this small network represents all the possible conceptual distances between complete theories. As a corollary of this, we will see that there are only two non-trivial structures definable on three-element sets up to conceptual equivalence (i.e., up to elementary plus definitional equivalence).},
	keywords = {Definitional equivalence; algebras of concepts; distance between theories; equivalence of structures; firstorder logic},
	year = {2024},
	eissn = {1755-0211},
	pages = {1-16},
	orcid-numbers = {Székely, Gergely/0000-0002-5227-069X}
}

@article{MTMT:34086911,
	title = {Protecting the railway infrastructure from the hazards of freight trains carrying dangerous goods},
	url = {https://m2.mtmt.hu/api/publication/34086911},
	author = {Horváth, Attila and Lévai, Zsolt},
	journal = {International Conference "Redefining Community in Intercultural Context"},
	volume = {11},
	unique-id = {34086911},
	issn = {2285-2689},
	abstract = {Transport infrastructure and the vehicles that run on it can be ideal targets for terrorists. This is true bothfor rail transport and for the trains themselves, especially those carrying dangerous goods. Hazardous materialsreleased as a result of a possible terrorist attack can cause far greater damage in terms of human life, material andnatural assets than the damage caused by simply blowing up a train. This article describes the rail environment inwhich dangerous goods are transported, then the relationship between terrorism and rail transport, and finallysuggests possible protection methods and procedures of the infrastructure and the trains.},
	keywords = {terrorism; rail transport; Critical infrastructure protection; transport of dangerous goods},
	year = {2023},
	pages = {144-152},
	orcid-numbers = {Horváth, Attila/0000-0001-5719-5388; Lévai, Zsolt/0000-0003-2410-1730}
}

@inproceedings{MTMT:33776581,
	title = {Autonomous Vehicles Forensics - The next step of the Digital Vehicles Forensics},
	url = {https://m2.mtmt.hu/api/publication/33776581},
	author = {Répás, József and Miklos, Schmidt and Berek, Lajos},
	booktitle = {2022 IEEE 1st International Conference on Cognitive Mobility (CogMob)},
	doi = {10.1109/CogMob55547.2022.10117757},
	unique-id = {33776581},
	keywords = {C-ITS; digital forensics; autonomous vehicles; autonomous vehicle forensics},
	year = {2022},
	pages = {67-72},
	orcid-numbers = {Berek, Lajos/0000-0003-1705-1173}
}

@article{MTMT:32319466,
	title = {GROUPS OF WORLDVIEW TRANSFORMATIONS IMPLIED BY ISOTROPY OF SPACE},
	url = {https://m2.mtmt.hu/api/publication/32319466},
	author = {Madarász, Judit and Stannett, Mike and Székely, Gergely},
	journal = {Journal of Applied Logics},
	volume = {8},
	unique-id = {32319466},
	issn = {2631-9829},
	abstract = {Given any Euclidean ordered field, Q, and any 'reasonable' group, G, of (1+3)-dimensional spacetime symmetries, we show how to construct a model M-G of kinematics for which the set W of worldview transformations between inertial observers satisfies W = G. This holds in particular for all relevant subgroups of Gal, cPoi, and cEucl (the groups of Galilean, Poincare and Euclidean transformations, respectively, where c is an element of Q is a model-specific parameter corresponding to the speed of light in the case of Poincare transformations).In doing so, by an elementary geometrical proof, we demonstrate our main contribution: spatial isotropy is enough to entail that the set W of worldview transformations satisfies either W subset of Gal, W subset of cPoi, or W subset of cEucl for some c > 0. So assuming spatial isotropy is enough to prove that there are only 3 possible cases: either the world is classical (the worldview transformations between inertial observers are Galilean transformations); the world is relativistic (the worldview transformations are Poincare transformations); or the world is Euclidean (which gives a nonstandard kinematical interpretation to Euclidean geometry). This result considerably extends previous results in this field, which assume a priori the (strictly stronger) special principle of relativity, while also restricting the choice of Q to the field R of reals.As part of this work, we also prove the rather surprising result that, for any G containing translations and rotations fixing the time-axis t, the requirement that G be a subgroup of one of the groups Gal, cPoi or cEucl is logically equivalent to the somewhat simpler requirement that, for all g is an element of G: g[t] is a line, and if g[t] = t then g is a trivial transformation (i.e. g is a linear transformation that preserves Euclidean length and fixes the time-axis setwise).},
	year = {2021},
	eissn = {2631-9810},
	pages = {809-876},
	orcid-numbers = {Székely, Gergely/0000-0002-5227-069X}
}

@article{MTMT:31261221,
	title = {The 84 mm recoilless support weapon system in the armament arsenal of the Hungarian Defence Forces},
	url = {https://m2.mtmt.hu/api/publication/31261221},
	author = {Szirota, Anita and Molnár, Péter and Sebők, István and Hegedűs, Ernő},
	doi = {10.23713/HT.54.2.01},
	journal-iso = {HADITECHNIKA},
	journal = {HADITECHNIKA},
	volume = {54},
	unique-id = {31261221},
	issn = {0230-6891},
	year = {2020},
	pages = {2-7},
	orcid-numbers = {Szirota, Anita/0000-0003-1484-1559; Molnár, Péter/0000-0002-4298-2167; Sebők, István/0000-0002-3276-4078; Hegedűs, Ernő/0000-0001-8457-5044}
}

@article{MTMT:30762548,
	title = {Trinity of Defense Industry},
	url = {https://m2.mtmt.hu/api/publication/30762548},
	author = {Taksás, Balázs},
	journal-iso = {ECON MANAG},
	journal = {ECONOMICS AND MANAGEMENT},
	volume = {2019},
	unique-id = {30762548},
	issn = {1802-3975},
	year = {2019},
	pages = {71-78},
	orcid-numbers = {Taksás, Balázs/0000-0001-7583-4198}
}

@article{MTMT:30760997,
	title = {"Vitézek" a Vörös téren − Harckocsik és harckocsi támogatók II.rész},
	url = {https://m2.mtmt.hu/api/publication/30760997},
	author = {Zentay, Péter Zoltán and Gyarmati, József},
	doi = {10.23713/HT.53.4.05},
	journal-iso = {HADITECHNIKA},
	journal = {HADITECHNIKA},
	volume = {53},
	unique-id = {30760997},
	issn = {0230-6891},
	year = {2019},
	pages = {27-31},
	orcid-numbers = {Zentay, Péter Zoltán/0000-0002-3161-8829; Gyarmati, József/0000-0001-7594-2383}
}

@article{MTMT:30760943,
	title = {Az üzemfenntartás speciális katonai követelményei},
	url = {https://m2.mtmt.hu/api/publication/30760943},
	author = {Gyarmati, József},
	doi = {10.23713/HT.53.4.01},
	journal-iso = {HADITECHNIKA},
	journal = {HADITECHNIKA},
	volume = {53},
	unique-id = {30760943},
	issn = {0230-6891},
	year = {2019},
	pages = {3-10},
	orcid-numbers = {Gyarmati, József/0000-0001-7594-2383}
}

@{MTMT:30742618,
	title = {A fejlődés és a versenyképesség mérésének evolúciója – Avagy hogyan jutottunk el az egy főre jutó GDP-től a zöld versenyképességig},
	url = {https://m2.mtmt.hu/api/publication/30742618},
	author = {Taksás, Balázs},
	booktitle = {A versenyképesség-mérés változásai és új irányai},
	unique-id = {30742618},
	year = {2019},
	pages = {51-83},
	orcid-numbers = {Taksás, Balázs/0000-0001-7583-4198}
}