Estimating the frequency of hybridization is important to understand its evolutionary consequences and its effects on conservation efforts. In this study, we examined the extent of hybridization in two sister species of ducks that hybridize. We used mitochondrial control region sequences and 3589 double-digest restriction-associated DNA sequences (ddRADseq) to identify admixture between wild le...

We consider the hash function proposals by Mridul et al. presented at FSE 2005. For the proposed 2n-bit compression functions it is proved that collision attacks require Ω(2) queries of the functions in question. In this note it is shown that with O(2n/3) queries one can distinguish the proposed compression functions from a randomly chosen 2n-bit function with very good probability. Finally we ...

Most wild and semi-wild species of the genus Gossypium are exhibit photoperiod-sensitive flowering. The wild germplasm cotton is a valuable source of genes for genetic improvement of modern cotton cultivars. A bi-parental cotton population segregating for photoperiodic flowering was developed by crossing a photoperiod insensitive irradiation mutant line with its pre-mutagenesis photoperiodic wi...

Associations between birth weight and CVD in adult life are supported by experiments showing that undernutrition in fetal life programmes blood pressure. In rats, the feeding of a maternal low-protein (MLP) diet during gestation programmes hypertension. The present study aimed to assess the potential for a nutritional insult to impact across several generations. Pregnant female Wistar (F0) rats...

In this paper we study conformally geodesic mappings between pseudo-Riemannian manifolds (M, g) and (M̄, ḡ), i.e. mappings f : M → M̄ satisfying f = f1 ◦ f2 ◦ f3, where f1, f3 are conformal mappings and f2 is a geodesic mapping. Suppose that the initial condition f∗ḡ = kg is satisfied at a point x0 ∈ M and that at this point the conformal Weyl tensor does not vanish. We prove that then f is neces...

Variations in the acoustic manifestations of the rounding and height contrasts in French vowels are investigated in different prosodic positions. Four speakers produced sentences containing the vowels /i, e, a, y, ø/ at the beginning of different prosodic constituents: Intonational Phrase, Accentual Phrase and Word. Acoustic cues for the rounding contrast (F2, F3, F3-F2) and for the vowel heigh...

This case study investigated the effect of body position on the first three formants (F1, F2, F3) of the British English vowels /iː/, /ɛ/, /æ/, /ɔː/ and /uː/ produced by one male native speaker. While F1 remained unaffected significant changes in F2 and F3 were found for certain vowels when they were produced in a supine rather than in an upright position. F2 was significantly lower for /iː/, /...

Heterosis is considered to be of little importance in soybean (Glycine max L. Merr.) because the crop is produced as “pure-line” cultivars or blends of inbred lines. The F1 generations Holladay/ Hutcheson (Cross 1) and Brim/Boggs (Cross 2) were generated by hand pollinations. Inbred generations were generated by bulk selfing. The F1, F2, F3, F4, and F5 generations were yield-tested in replicate...

The aim of this acoustic study is to examine place of articulation during the production of voiced plosives by children with a cleft palate. The data is compared with those obtained from control children without speech disorders. Formant values of F2 and F3 are measured at burst release of the plosives. Analyses are carried out for 52 children, from 9 to 18 years old. Two groups were establishe...

This paper reports an attempt to map the time variations of selected articulatory parameters (from X-ray profiles) directly on the F1, F2 and F3 formant tracks using multiple regression analysis (MRA). The results indicate that MRA can indeed be useful for predicting formant frequencies. Since the results reported here are limited to preliminary observations of F1 only, further studies includin...