Vowel reduction in English

The aim of the paper is to explore two closely related processes of vowel reduction in English, i.e. syllabic consonant formation and syncope. Apart from many similarities between these two processes, there are also quite a few differences and this paper presents them both. More specifically, we discuss the exact context in which they occur, try to find out the constraints governing their distribution and explain the reason for their diverse and varied effects on the preceding and following phonological material. It is pointed out that such differences arise due to two general cross-linguistic constrains operating in English

Flux density measurements of GPS candidate pulsars at 610 MHz using interferometric imaging technique

We conducted radio interferometric observations of six pulsars at 610 MHz using the Giant Metrewave Radio Telescope (GMRT). All these objects were claimed or suspected to be the gigahertz-peaked spectra (GPS) pulsars. For a half of the sources in our sample the interferometric imaging provides the only means to estimate their flux at 610 MHz due to a strong pulse scatter-broadening. In our case, these pulsars have very high dispersion measure values and we present their spectra containing for the first time low-frequency measurements. The remaining three pulsars were observed at low frequencies using the conventional pulsar flux measurement method. The interferometric imaging technique allowed us to re-examine their fluxes at 610 MHz. We were able to confirm the GPS feature in the PSR B1823$-$13 spectrum and select a GPS candidate pulsar. These results clearly demonstrate that the interferometric imaging technique can be successfully applied to estimate flux density of pulsars even in the presence of strong scattering.Comment: 7 pages, 3 tables, 5 figures, accepted for publication in MNRA

Emission altitudes in young and old radio pulsars

The paper presents a comparison of emission altitudes in very young and very old radio pulsars. The author confirmes that altitudes at which radio emission at a given frequency is generated depend on pulsar period and on pulsar age, although the latter dependence is quite weak.Comment: 7 pages, LaTex, 3 PS figures, accepted for publication in MNRA