TY - JOUR AU - Horváth, Attila AU - Lévai, Zsolt TI - Protecting the railway infrastructure from the hazards of freight trains carrying dangerous goods JF - International Conference "Redefining Community in Intercultural Context" VL - 11 PY - 2023 IS - 1 SP - 144 EP - 152 PG - 9 SN - 2285-2689 UR - https://m2.mtmt.hu/api/publication/34086911 ID - 34086911 AB - 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. LA - English DB - MTMT ER - TY - CHAP AU - Répás, József AU - Miklos, Schmidt AU - Berek, Lajos TI - Autonomous Vehicles Forensics - The next step of the Digital Vehicles Forensics T2 - 2022 IEEE 1st International Conference on Cognitive Mobility (CogMob) PB - Institute of Electrical and Electronics Engineers (IEEE) CY - Piscataway (NJ) SN - 9781665476324 PY - 2022 SP - 67 EP - 72 PG - 6 DO - 10.1109/CogMob55547.2022.10117757 UR - https://m2.mtmt.hu/api/publication/33776581 ID - 33776581 LA - English DB - MTMT ER - TY - JOUR AU - Madarász, Judit AU - Stannett, Mike AU - Székely, Gergely TI - GROUPS OF WORLDVIEW TRANSFORMATIONS IMPLIED BY ISOTROPY OF SPACE JF - JOURNAL OF APPLIED LOGICS J2 - JAL-FLAP VL - 8 PY - 2021 IS - 3 SP - 809 EP - 876 PG - 68 SN - 2631-9829 UR - https://m2.mtmt.hu/api/publication/32319466 ID - 32319466 N1 - Export Date: 26 January 2022 AB - 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). LA - English DB - MTMT ER - TY - JOUR AU - Szirota, Anita AU - Molnár, Péter AU - Sebők, István AU - Hegedűs, Ernő TI - The 84 mm recoilless support weapon system in the armament arsenal of the Hungarian Defence Forces JF - HADITECHNIKA J2 - HADITECHNIKA VL - 54 PY - 2020 IS - 2 SP - 2 EP - 7 PG - 6 SN - 0230-6891 DO - 10.23713/HT.54.2.01 UR - https://m2.mtmt.hu/api/publication/31261221 ID - 31261221 LA - English DB - MTMT ER - TY - JOUR AU - Taksás, Balázs TI - Trinity of Defense Industry JF - ECONOMICS AND MANAGEMENT J2 - ECON MANAG VL - 2019 PY - 2019 IS - 1 SP - 71 EP - 78 PG - 8 SN - 1802-3975 UR - https://m2.mtmt.hu/api/publication/30762548 ID - 30762548 LA - English DB - MTMT ER - TY - JOUR AU - Zentay, Péter Zoltán AU - Gyarmati, József TI - "Vitézek" a Vörös téren − Harckocsik és harckocsi támogatók II.rész JF - HADITECHNIKA J2 - HADITECHNIKA VL - 53 PY - 2019 IS - 4 SP - 27 EP - 31 PG - 5 SN - 0230-6891 DO - 10.23713/HT.53.4.05 UR - https://m2.mtmt.hu/api/publication/30760997 ID - 30760997 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Gyarmati, József TI - Az üzemfenntartás speciális katonai követelményei JF - HADITECHNIKA J2 - HADITECHNIKA VL - 53 PY - 2019 IS - 4 SP - 3 EP - 10 PG - 8 SN - 0230-6891 DO - 10.23713/HT.53.4.01 UR - https://m2.mtmt.hu/api/publication/30760943 ID - 30760943 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Taksás, Balázs ED - Csath, Magdolna TI - A fejlődés és a versenyképesség mérésének evolúciója – Avagy hogyan jutottunk el az egy főre jutó GDP-től a zöld versenyképességig T2 - A versenyképesség-mérés változásai és új irányai PB - Dialóg Campus Kiadó CY - Budapest SN - 9786155945540 PY - 2019 SP - 51 EP - 83 PG - 33 UR - https://m2.mtmt.hu/api/publication/30742618 ID - 30742618 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Tóth, László Viktor AU - Doi, Yasuo AU - Zahorecz, Sarolta AU - Pintér, Sándor AU - Rácz, István AU - Bagoly, Zsolt AU - Balázs, Lajos AU - Horváth, István AU - Kiss, Csaba AU - Kovács, Tímea Orsolya AU - Onishi, Toshikazu TI - Galactic foreground of gamma-ray bursts from AKARI Far-Infrared Surveyor JF - PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN J2 - PUBL ASTRON SOC JPN VL - 71 PY - 2019 IS - 1 SP - 1 EP - 20 PG - 20 SN - 0004-6264 DO - 10.1093/pasj/psy123 UR - https://m2.mtmt.hu/api/publication/30352931 ID - 30352931 AB - We demonstrate the use of the AKARI FIS All-Sky Survey maps in the study of extragalactic objects. A quick but reliable estimate of the Galactic foreground is essential for extragalactic research in general. We explored the galactic foreground and calculated hydrogen column densities using AKARI FIS and other recent all-sky survey data, and compared our results to former estimates. Our AKARI-FIS-based foreground values were then used toward gamma-ray burst (GRB) sources as input for X-ray afterglow spectrum fitting. From those fits the intrinsic column densities at the GRB sources were derived. The high-angular-resolution AKARI-FIS-based Galactic foreground hydrogen column densities are statistically very similar, but for most of the tested directions somewhat lower than previous estimates based on low-resolution data. This is due to the low filling factor of high-density enhancements in all galactic latitudes. Accordingly, our AKARI-FIS-based new intrinsic hydrogen column densities are usually higher or similar compared to the values calculated based, e.g., on the low-resolution Leiden/Argentine/Bonn survey data and listed in the Leicester database. The variation, however, is typically smaller than the error of the estimate from the fits of the X-ray afterglow spectra. There are a number of directions where the improvement of the foreground estimates resulted in an overestimate of magnitude or higher increment of the derived intrinsic hydrogen column densities. We concluded that most of the GRBs with formerly extremely low intrinsic hydrogen column densities are in fact normal, but we confirmed that GRB050233 is indeed a non- enveloped long GRB. LA - English DB - MTMT ER - TY - CHAP AU - Lakatos, Péter ED - Stević, Željko ED - Vukić, Milena ED - Lukovac, Vesko TI - ACTIVITY AND RESEARCH RESULTS OF THE LUDOVIKA RESEARCH GROUP FOR THE FOOTPRINT OF PUBLIC SERVICE IN 2017: CARBON FOOTPRINT OF THE HUNGARIAN POLICE IN 2016 T2 - Proceedings of the 2nd International Conference on. Management, Engineering and Environment, ICMNEE 2018 PB - Regional Association for Security and Crisis Management (RASEC) CY - Belgrade SN - 9788680698120 PY - 2018 SP - 13 EP - 18 PG - 6 UR - https://m2.mtmt.hu/api/publication/30855594 ID - 30855594 N1 - Bemutatva. LA - English DB - MTMT ER -