for a fixed positive integer , we say a ring with identity is n-generalized right principally quasi-baer, if for any principal right ideal of , the right annihilator of is generated by an idempotent. this class of rings includes the right principally quasi-baer rings and hence all prime rings. a certain n-generalized principally quasi-baer subring of the matrix ring are studied, and connections...

By J. BEC, L. B IFERALE, G. BOFFETTA, A. CELANI, M. CENCINI, A. LANOTTE, S. MUSACCHIO AND F. TOSCHI CNRS Observatoire de la Côte d’Azur, B.P. 4229, 06304 Nice Cedex 4, France Department of Physics and INFN, University of Rome “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Roma, Italy Department of Physics and INFN, University of Torino, Via Pietro Giuria 1, 10125, Torino, Italy CNRS, INL...

D. Boutigny Laboratoire de Physique des Particules, F-74941, Annecy-le-Vieux, France D.H. Smith University of Birmingham, Birmingham B15 2TT, United Kingdom E. Antonioli, C. Bozzi, E. Luppi, P. Veronesi Università di Ferrara, Dipartimento di Fisica and INFN, I-44100 Ferrara, Italy G. Grosdidier Laboratoire de l'Accélérateur Linéaire, F91898 Orsay, France D. Colling, J. Martyniak, R. Walker Univ...

1 Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile, 2 Geroscience Center for Brain Health and Metabolism, Santiago, Chile, 3 Buck Institute for Research on Aging, Novato, CA, United States, 4 Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, United States, 5 Department of Morphol...

5. Bakos RM, Cartell A, Bakos L. Dermatoscopy of early-onset necrobiosis lipoidica. J Am Acad Dermatol. 2012;66:143--4. 6. Vazquez-Lopez V, Kreusch J, Marghoob AA. Dermoscopic semiology: further insights into vascular features by screening a large spectrum of nontumoral skin lesions. Br J Dermatol. 2004;150:226--31. 7. Brasiello M, Zalaudek I, Ferrara G, Gourhant JY, Capoluongo P, Roma P, et al...

*Correspondence: Fabrizio Riguzzi , Dipartimento di Matematica e Informatica, Università di Ferrara, Via Saragat 1, Ferrara 44122, Italy e-mail: [email protected] The field of Probabilistic Logic Programming (PLP) has seen significant advances in the last 20 years, with many proposals for languages that combine probability with logic programming. Since the start, the problem of learning...

Let τ(G) and τG(e) denote the number of spanning trees of a graph G and the number of spanning trees of G containing edge e of G, respectively. Ferrara, Gould, and Suffel asked if, for every rational 0 < p/q < 1 there existed a graph G with edge e ∈ E(G) such that τG(e)/τ(G) = p/q. In this note we provide constructions that show this is indeed the case. Moreover, we show this is true even if we...

PURPOSE To report the effect of wavefront-guided photorefractive keratectomy and corneal collagen cross-linking (CXL) on visual problems after Ferrara ring segment placement. MATERIALS AND METHODS A 32-year-old male patient was treated with a Ferrara ring segment for keratoconus. One year later, the ring was removed due to severe glare complaints. After 6 months, wavefront-guided photorefract...