EXAMINATIONS FOR THE DETERMINATION OF LOAD-CARRYING CAPACITY OF THE BRIDGE OVER THE SEBES-KÖRÖS AT VÉSZTŐ

Load-carrying elements of a 100 years old steel (wrought iron) railway bridge have been examined. On the basis of in-situ supervision, statical analysis, in-situ and laboratory measurements conditions of the further service have been determined. The laboratory fatigue tests verified the safety of the bridge against failure

Mapping a star with transits: orbit precession effects in the Kepler-13 system

Kepler-13b (KOI-13.01) is a most intriguing exoplanet system due to the rapid precession rate, exhibiting several exotic phenomena. We analyzed $Kepler$ Short Cadence data up to Quarter 14, with a total time-span of 928 days, to reveal changes in transit duration, depth, asymmetry, and identify the possible signals of stellar rotation and low-level activity. We investigated long-term variations of transit light curves, testing for duration, peak depth and asymmetry. We also performed cluster analysis on $Kepler$ quarters. We computed the autocorrelation function of the out-of-transit light variations. Transit duration, peak depth, and asymmetry evolve slowly, due to the slowly drifting transit path through the stellar disk. The detected transit shapes will map the stellar surface on the time scale of decades. We found a very significant clustering pattern with 3-orbit period. Its source is very probably the rotating stellar surface, in the 5:3 spin-orbit resonance reported in a previous study. The autocorrelation function of the out-of-transit light variations, filtered to 25.4 hours and harmonics, shows slow variations and a peak around 300--360 day period, which could be related to the activity cycle of the host star.Comment: 7 pages, 7 figures, accepted in MNRA

ON DIFFERENTIAL FORMS OF THE CONSTITUTIVE EQUATIONS FOR ELASTO-PLASTIC SOLIDS

Actually, several theories are in use for describing elasto-plastic deformation. A wide variety of forms exist for constitutive equations expressing theories of plasticity. Here, a general form of constitutive equations will be given for a significant group of theories of small elasto-plastic deformations. It is pointed out that this incremental constitutive equation arises as a special case of the theory de\'eloped by Beda [1] for the general description of plastic behaviour

Pushing the limits: K2 observations of the trans-Neptunian objects 2002 GV31 and (278361) 2007 JJ43

We present the first photometric observations of trans-Neptunian objects (TNOs) taken with the Kepler space telescope, obtained in the course of the K2 ecliptic survey. Two faint objects have been monitored in specifically designed pixel masks that were centered on the stationary points of the objects, when their daily motion was the slowest. In the design of the experiment, only the apparent path of these objects were retrieved from the detectors, i.e. the costs in terms of Kepler pixels were minimized. Because of the faintness of the targets we employ specific reduction techniques and co-added images. We measure rotational periods and amplitudes in the unfiltered Kepler band as follows: for (278361) 2007 JJ43 and 2002 GV31 we get P_rot=12.097 h and P_rot=29.2 h while 0.10 and 0.35 mag for the total amplitudes, respectively. Future space missions, like TESS and PLATO are not well suited to this kind of observations. Therefore, we encourage to include the brightest TNOs around their stationary points in each observing campaign to exploit this unique capability of the K2 Mission -- and therefore to provide unbiased rotational, shape and albedo characteristics of many objects.Comment: Accepted for publication in ApJ Letters, 5.2 pages in emulateapj style, misspelled 2007 JJ43 designation correcte

Some phytochemical and morphophysiological characteristics of Euphorbia cyparissias L. populations

Perennial plants are able to adapt to different ecological habitats with their morphological and physiological characteristics. In this study some population of cyparissias L. were investigated. This stress tolerant species can adapt to its environment with morphological and reproductive marks. Differences were not detected in the presence of the investigated phytochemical compounds, only in their respective quantity, considering the extracts from Stem, leaf and inflorescence