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679 Research products, page 1 of 68

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  • Open Access
    Authors: 
    Müller, Márta;
    Publisher: ELTE Germanistisches Institut
    Country: Hungary
    Project: EC | COLLMOT (227878)
  • Publication . Article . Preprint . 2015 . Embargo End Date: 01 Jan 2015
    Open Access
    Authors: 
    Aliz Derekas; Péter Németh; John Southworth; Tamás Borkovits; Krisztián Sárneczky; András Pál; B. Csák; D. Garcia-Alvarez; Pierre F. L. Maxted; László L. Kiss; +3 more
    Publisher: arXiv
    Countries: United Kingdom, Hungary, United Kingdom
    Project: EC | ASK (269194), EC | SPACEINN (312844), EC | ASK (269194), EC | SPACEINN (312844)

    We report the discovery of a new totally-eclipsing binary (RA=06:40:29.11; Dec=+38:56:52.2; J=2000.0; Rmax=17.2 mag) with an sdO primary and a strongly irradiated red dwarf companion. It has an orbital period of Porb=0.187284394(11) d and an optical eclipse depth in excess of 5 magnitudes. We obtained two low-resolution classification spectra with GTC/OSIRIS and ten medium-resolution spectra with WHT/ISIS to constrain the properties of the binary members. The spectra are dominated by H Balmer and He II absorption lines from the sdO star, and phase-dependent emission lines from the irradiated companion. A combined spectroscopic and light curve analysis implies a hot subdwarf temperature of Teff(spec) = 55 000 +/- 3000K, surface gravity of log g(phot) = 6.2 +/- 0.04 (cgs) and a He abundance of log(nHe/nH) = -2.24 +/- 0.40. The hot sdO star irradiates the red-dwarf companion, heating its substellar point to about 22 500K. Surface parameters for the companion are difficult to constrain from the currently available data: the most remarkable features are the strong H Balmer and C II-III lines in emission. Radial velocity estimates are consistent with the sdO+dM classification. The photometric data do not show any indication of sdO pulsations with amplitudes greater than 7mmag, and Halpha-filter images do not provide evidence of the presence of a planetary nebula associated with the sdO star. Comment: 13 pages, 5 figures; accepted for publication in ApJ

  • Open Access
    Authors: 
    Kelényi, Borbála;
    Country: Hungary
    Project: EC | COLLMOT (227878)
  • Open Access
    Authors: 
    Alexandra Markó; Andrea Deme; Márton Bartók; Tekla Etelka Gráczi; Tamás Gábor Csapó;
    Publisher: Springer International Publishing
    Country: Hungary
    Project: EC | COLLMOT (227878)

    We examined vowel-initial irregular phonation in real words as a function of vowel quality, backness and height, and speech rate in Hungarian. We analyzed two types of irregular phonation: glottalization and glottal stop. We found that open vowels elicited more irregular phonation than mid and close ones, but we found no effect of the backness. The frequency of irregular phonation was lower in fast than in slow speech. Inconsistently with the claims of earlier studies, the relative frequency of glottalization to glottal stops was not influenced by speech rate in general. However, while /i/ was produced with a relatively higher ratio of glottal stops in fast speech, the open vowels showed the widely documented tendency of being realized with relatively less glottal stops under the same conditions.

  • Open Access English
    Authors: 
    Péter Ábrahám; Kóspál; M. Kun; O. Fehér; G. Zsidi; J. A. Acosta-Pulido; M. I. Carnerero; D. Garcia-Alvarez; Attila Moór; B. Cseh; +17 more
    Country: Hungary
    Project: EC | SACCRED (716155)

    V582 Aur is an FU Ori-type young eruptive star in outburst since $\sim$1985. The eruption is currently in a relatively constant plateau phase, with photometric and spectroscopic variability superimposed. Here we will characterize the progenitor of the outbursting object, explore its environment, and analyse the temporal evolution of the eruption. We are particularly interested in the physical origin of the two deep photometric dips, one occurred in 2012, and one is ongoing since 2016. We collected archival photographic plates, and carried out new optical, infrared, and millimeter wave photometric and spectroscopic observations between 2010 and 2017, with high sampling rate during the current minimum. Beside analysing the color changes during fading, we compiled multiepoch spectral energy distributions, and fitted them with a simple accretion disk model. Based on pre-outburst data and a millimeter continuum measurement, we suggest that the progenitor of the V582 Aur outburst is a low-mass T Tauri star with average properties. The mass of an unresolved circumstellar structure, probably a disk, is 0.04 M$_{\odot}$. The optical and near-infrared spectra demonstrate the presence of hydrogen and metallic lines, show the CO bandhead in absorption, and exhibit a variable H$\alpha$ profile. The color variations strongly indicate that both the $\sim$1 year long brightness dip in 2012, and the current minimum since 2016 are caused by increased extinction along the line of sight. According to our accretion disk models, the reddening changed from $A_V$=4.5 mag to 12.5 mag, while the accretion rate remained practically constant. Similarly to the models of the UXor phenomenon of intermediate and low-mass young stars, orbiting disk structures could be responsible for the eclipses. Comment: 20 pages, 11 figures, accepted for publication in ApJ

  • Open Access Hungarian
    Authors: 
    Szabó, Péter; Kelényi, Borbála;
    Publisher: Debreceni Egyetemi Kiadó
    Country: Hungary
    Project: EC | COLLMOT (227878)
  • Open Access
    Authors: 
    Helena Kovacs; Luís Tinoca;
    Country: Hungary
    Project: EC | EDiTE-EJD (676452)

    Calibrating the right developmental approach when introducing a new innovative intervention is a complex task for governments, and schools alike. The new Projeto-Piloto de Inovação Pedagógica offers six schools an opportunity to break most ofthe rules in order to unfreeze pedagogical and curricular traditions and open the “black box” classrooms. The paper examines what this intervention means for the Ministry and for the schools involved and reflects on its prospected outcomes.

  • Open Access
    Authors: 
    Csaba Ferencz; G.V. Lizunov; François Crespon; Ivan Price; Ludmil Bankov; Dorota Przepiórka; Klaus Brieß; Denis Dudkin; Andrey Girenko; Valery Korepanov; +10 more
    Publisher: EDP Sciences
    Country: Hungary
    Project: EC | POPDAT (263240)

    In the frame of the FP7 POPDAT project the Ionosphere Waves Service (IWS) has been developed and opened for public access by ionosphere experts. IWS is forming a database, derived from archived ionospheric wave records to assist the ionosphere and Space Weather research, and to answer the following questions: How can the data of earlier ionospheric missions be reprocessed with current algorithms to gain more profitable results? How could the scientific community be provided with a new insight on wave processes that take place in the ionosphere? The answer is a specific and unique data mining service accessing a collection of topical catalogs that characterize a huge number of recorded occurrences of Whistler-like Electromagnetic Wave Phenomena, Atmosphere Gravity Waves, and Traveling Ionosphere Disturbances. IWS online service (http://popdat.cbk.waw.pl) offers end users to query optional set of predefined wave phenomena, their detailed characteristics. These were collected by target specific event detection algorithms in selected satellite records during database buildup phase. Result of performed wave processing thus represents useful information on statistical or comparative investigations of wave types, listed in a detailed catalog of ionospheric wave phenomena. The IWS provides wave event characteristics, extracted by specific software systems from data records of the selected satellite missions. The end-user can access targets by making specific searches and use statistical modules within the service in their field of interest. Therefore the IWS opens a new way in ionosphere and Space Weather research. The scientific applications covered by IWS concern beyond Space Weather also other fields like earthquake precursors, ionosphere climatology, geomagnetic storms, troposphere-ionosphere energy transfer, and trans-ionosphere link perturbations. © 2014 C. Ferencz et al.

  • Open Access English
    Authors: 
    unknown;
    Publisher: International Council of Onomastic Sciences; Magyar Nyelvtudományi Társaság
    Country: Hungary
    Project: EC | COLLMOT (227878)
  • Open Access Hungarian
    Authors: 
    János N. Fodor;
    Publisher: Society of Hungarian Linguistics; Institute of Hungarian Linguistics and Finno-Ugric Studies of ELTE University
    Country: Hungary
    Project: EC | COLLMOT (227878)

    Aspects and methods for examining the connection between personal names and ethnicity It is a difficult task to determine the value of proper names in ethnic reconstruction. This can be considered a dubious area of onomastic/linguistic and historical research. Even the explanation of the basic concepts seems to be problematic; still, defining ethnicity and identifying the nature of the connection between ethnicity and language cannot be avoided. It is also important to define the value of the different types of personal names as sources: what can and cannot the research into the etymology of surnames be used for, what are the factors that have an impact on linguistic recon-struction, how can individual names help ethnic reconstruction, etc. After summarizing the back-ground research of name analysis in Hungary, the author presents a multi-level method of ethnic reconstruction based on personal names. The procedure tries to separate the determination of the name’s etymology from that of the ethnic affiliation, placing the examination objectives at separate levels. On the first level, the etymology of the surnames is determined and the linguistic background of the name is explored by considering linguistic aspects only, paying attention to the rules of ety-mological and onomastic research. The author separates two levels of the examination of ethnic reconstruction that are built upon each other. On the one hand, the linguistic features of the indi-vidual names are observed, and then other information on name sociology (e.g. social status, majority population), referring directly or indirectly to ethnic background, is taken into consideration.

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