Search results for "Cone"
showing 10 items of 772 documents
MR3126328 Dosi, Anar Quantum cones and their duality. Houston J. Math. 39 (2013), no. 3, 853–887
2014
Common Fixed Point of Generalized Contractive Type Mappings in Cone Metric Spaces
2011
We obtain common fixed points and points of coincidence of a pair of mappings satisfying a generalized contractive type condition in cone metric spaces. Our results generalize some well-known recent results in the literature.
MR2661185 Reviewed Huang, Xianjiu; Zhu, Chuanxi; Wen, Xi Common fixed point theorem for four non-self-mappings in cone metric spaces. Fixed Point The…
2012
Recently, L. G. Huang and X. Zhang [J. Math. Anal. Appl. 332 (2007), no. 2, 1468–1476; MR2324351 (2008d:47111)] defined cone metric spaces by substituting an order normed space for the real numbers and proved some fixed point theorems. In this paper the authors prove a common fixed point theorem for four non-self-mappings in the framework of cone metric spaces. This result is an extension of a common fixed point theorem of Radenović and Rhoades for two non-self-mappings. The paper also contains some illustrative examples. For fixed point results in the framework of cone metric spaces see also [M. Arshad, A. Azam and P. Vetro, Fixed Point Theory Appl. 2009, Art. ID 493965; MR2501489 (2010e:5…
A fixed point theorem for uniformly locally contractive mappings in a C-chainable cone rectangular metric space
2011
Recently, Azam, Arshad and Beg [ Banach contraction principle on cone rectangular metric spaces, Appl. Anal. Discrete Math. 2009] introduced the notion of cone rectangular metric spaces by replacing the triangular inequality of a cone metric space by a rectangular inequality. In this paper, we introduce the notion of c-chainable cone rectangular metric space and we establish a fixed point theorem for uniformly locally contractive mappings in such spaces. An example is given to illustrate our obtained result.
Resistance to disinfection of a polymicrobial association contaminating the surface of elastomeric dental impressions.
2009
The aim of this study was to evaluate the ability to resist disinfection of a polymicrobial association contaminating the surface of dental impressions obtained with two different elastomers: a polyether (Impregum) and an addition-polymerized silicone (Elite). Impressions were contaminated with a mixture of three biofilm-forming microorganisms (Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans) and disinfected immediately after contamination, or after microbial layers were allowed to develop during a six-hour storage. Two commercial disinfectants were tested: MD 520 containing 0.5% glutaraldehyde and Sterigum Powder without glutaraldehyde. Residual contamination was recover…
The relevance of Scientific evidences in Criminal Investigations of mafia's crime: the experience of "Capaci Bloodshed" and the Murder of the judge G…
2011
MARSHALL, SRAFFA E LE 'SCATOLE VUOTE' DI JANNACCONE
1998
«Com’è un mafioso?» Raccontare dall’interno il “mestiere” del poliziotto
2018
Il saggio analizza il racconto autobiografico che Maurizio Ortolan, (ispettore di polizia in servizio dal 1987 al 2013 presso il Nucleo centrale anticrimine) fa della sua esperienza lavorativa, con taglio asciutto ed essenziale, denso di rimandi a importanti episodi delle cronache criminali italiane degli ultimi trent’anni e carico di un vissuto che ha incrociato le biografie di alcuni dei più significativi protagonisti di quel periodo. Utilizzando uno sguardo etnografico e partendo dal racconto di Ortolan, l'autrice fa emergere quegli aspetti che, pur strettamente legati al singolo vissuto, gettano luce sulle pratiche condivise del "mestiere" del poliziotto.
Maxiprocesso
2005
Tra il 1983 e il 1985, l’impressionante sequenza di omicidi e di stragi mafiose che insanguinò l’estremo Sud della Penisola favorì anche la nascita di un forte movimento politico e d’opinione, che reclamava iniziative istituzionali più drastiche per il risanamento sociale ed economico di quelle porzioni del territorio nazionale ove la sovranità dello Stato sembrava ormai espropriata dalle varie consorterie criminali che vi operavano indisturbate. Questo clima di forte mobilitazione politica e civile avrebbe potuto contribuire a spingere le istituzioni verso posizioni di sostegno all’attività degli investigatori e dei magistrati più impegnati nel contrasto alle organizzazioni mafiose. Il 10 …
Formation of silicones mediated by the sponge enzyme silicatein-α
2010
The sponge-restricted enzyme silicatein-α catalyzes in vivo silica formation from monomeric silicon compounds from sea water (i.e. silicic acid) and plays the pivotal role during synthesis of the siliceous sponge spicules. Recombinant silicatein-α, which was cloned from the demosponge Suberites domuncula (phylum Porifera), is shown to catalyze in vitro condensation of alkoxy silanes during a phase transfer reaction at neutral pH and ambient temperature to yield silicones like the straight-chained polydimethylsiloxane (PDMS). The reported condensation reaction is considered to be the first description of an enzymatically enhanced organometallic condensation reaction.