1,355,319 research outputs found
Varricchio-Suppl Mat
No full textFive tables on: 1) the gas conductance of an average Troodon egg from MOR 299 and 750, 2) the gas conductance of a weighted (by sample size) average Troodon egg from MOR 299 ad 750, 3) chi-square test results for for uniform pore distributions in MOR 299 and 750, 4) chi-square test results for pore distribution comparison of Troodon eggs MOR 750 and 299, and 5) chi-square test for uniform distribution for average Troodon egg
Well quasi-orders generated by a word-shuffle rewriting
No full textGiven a set I of words, the set L⊢Iε{lunate} of all words obtained by the shuffle of (copies of) words of I is naturally provided with a partial order: for u, v in L⊢Iε{lunate}, u ⊢I* v if and only if v is the shuffle of u and another word of L⊢Iε{lunate}. In [F. D'Alessandro, S. Varricchio, Well quasi-orders, unavoidable sets and derivation systems, in: Word Avoidability Complexity and Morphisms (WACAM), RAIRO Theoretical Informatics and Applications 40 (3) (2006) 407-426 (special issue)], the authors have opened the problem of the characterization of the finite sets I such that ⊢I* is a well quasi-order on L⊢Iε{lunate}. In this paper we give an answer in the case when I consists of a single word w. © 2007 Elsevier Ltd. All rights reserved
Author Correction: Thyroid hormone induces progression and invasiveness of squamous cell carcinomas by promoting a ZEB-1/E-cadherin switch (Nature Communications, (2019), 10, 1, (5410), 10.1038/s41467-019-13140-2)
No full textThe original version of this Article contained an error in the author affiliations. Silvia Varricchio, Gennaro Ilardi and Stefania Staibanow were incorrectly associated with ‘Department of Public Health, University of Naples "Federico II", Naples, Italy’ instead of the correct ‘Department of Advanced Biomedical Sciences, University of Naples “Federico II”, Naples, Italy.’ This has now been corrected in both the PDF and HTML versions of the Article
Réinterprétation de la position systématique de <i>Piksi barbarulna</i> Varricchio, 2002 (Formation Two Medicine, Crétacé supérieur, Montana, États-Unis) : un ptérosaure plutôt qu’un oiseau
No full textVarrichio (2002) a décrit, du Crétacée supérieur (Campanien, Formation Two Medicine, Glacier County, Montana, USA), des os de pattes avant d’un oiseau supposé ornithothoraciné, comme l’holotype de Piksi barbarulna. La présente révision du genre Piksi le place plutôt chez les Pterosauria Kaup, 1834 que chez les Aves Linnaeus, 1758. Effet, l’humérus de Piksi Varricchio, 2002 porte des caractères dérivés de ptérosaures : 1) très grand ectepicondyle ; 2) large trochlée ; 3) avec une dépression brachiale profonde, large et peu délimitée qui est proximo-distalement étendue ; 4) une large et profonde fosse olécranienne non marquée dorsalement par un pont ; et 5) l’absence de dépression distale sur le sillon du m. humerotricipitalis. Les citations de Piksi constituent donc d’importants ajouts au registre de ptérosaures du Crétacé le plus tardif. De plus, les genres du Crétacée inférieur Eurolimnornis Jurcsák & Kessler, 1986 et Palaeocursornis Jurcsák & Kessler, 1986, rapportés aux oiseaux sur la base de la partie distale des humérus, sont également considérés ici comme des ptérosaures.Varricchio (2002) described some forelimb bones from the Late Cretaceous (Campanian) Two Medicine Formation, Glacier County, Montana (USA), as the holotype of Piksi barbarulna, a supposed ornithothoracine bird. However reevaluation of Piksi Varricchio, 2002 instead recognizes this genus as belonging to Pterosauria Kaup, 1834 and not Aves Linnaeus, 1758. Piksi exhibits the following derived humeral traits of pterosaurs: 1) very large ectepicondyle; 2) large trochlea; 3) with a deep, wide and poorly deliminated brachial depression that is proximodistally extended; 4) a wide and deep olecranal fossa not marked dorsally by a ridge; and 5) lacking a distal depression of the groove for the m. humerotricipitalis. Moreover, the putative Early Cretaceous birds Eurolimnornis Jurcsák & Kessler, 1986 and Palaeocursornis Jurcsák & Kessler, 1986, based on distal humeri, are also regarded as pterosaurs. The record of Piksi constitutes an important addition to the Latest Cretaceous pterosaurian record.</p
A finiteness condition for semigroups generalizing a theorem of Coudrain and Schutzenberger
No full textAbstractLet S be a semigroup. For s, t ∈ S we set s ≤Bt if s ∈ {t} ∪ tS1t; we say that S satisfies the condition minB, if and only if any strictly descending chain w.r.t. ≤B of elements of S has a finite length. The main result of the paper is the following theorem: Let T be a semigroup satisfying minB. Let T′ be a subsemigroup of T such that all subgroups of T are locally finite in T′. Then T′ is locally finite. This result is a noteworthy generalization of a theorem of Coudrain and Schützenberger. Moreover, as a corollary we obtain the theorem of McNaughton and Zalcstein which gives a positive answer to the Burnside problem for semigroups of matrices on a field
Well quasi-orders, unavoidable sets, and derivation systems
No full textLet I be a finite set of words and be the derivation relation
generated by the set of productions {ε → u | u ∈ I}.
Let be the set of words u such that .
We prove that the set I is unavoidable if and only if the relation
is a well quasi-order on the set . This result generalizes a theorem of
[Ehrenfeucht et al.,
Theor. Comput. Sci. 27 (1983) 311–332]. Further generalizations are investigated
- …
