3,893 research outputs found
Isomorphism classes of the hypergroups of type U on the right of size five
No full textAbstractBy means of a blend of theoretical arguments and computer algebra techniques, we prove that the number of isomorphism classes of hypergroups of type U on the right of order five, having a scalar (bilateral) identity, is 14751. In this way, we complete the classification of hypergroups of type U on the right of order five, started in our preceding papers [M. De Salvo, D. Freni, G. Lo Faro, A new family of hypergroups and hypergroups of type U on the right of size five, Far East J. Math. Sci. 26(2) (2007) 393–418; M. De Salvo, D. Freni, G. Lo Faro, A new family of hypergroups and hypergroups of type U on the right of size five Part two, Mathematicki Vesnik 60 (2008) 23–45; M. De Salvo, D. Freni, G. Lo Faro, On the hypergroups of type U on the right of size five, with scalar identity (submitted for publication)]. In particular, we obtain that the number of isomorphism classes of such hypergroups is 14865
Un ‘Faro’ per Taranto
No full textSi propone l'applicazione dei principi della Convenzione di Faro nell'azione di tutela e valorizzazione del patrimonio culturale di Tarant
Electrospun polyaniline fibers synthesized by green route
No full textElectrospun polyaniline fibers synthesized by green route
P. Fronteraa, M. Lo Faroc, C .Busaccaa, P. L. Antonuccia, E. Fallettab,C. Della Pinab, M.Rossib
a: Dipartimento Meccanica e Materiali, Facoltà di Ingegneria, Università Mediterranea di Reggio Calabria , via Graziella loc. Feo di Vito 89124, Reggio Calabria, Italy. E-mail: [email protected], [email protected],
b: Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy. E-mail: [email protected], [email protected], [email protected],
c: CNR-ITAE, salita Santa Lucia sopra Contesse 5, 98126 Messina Italy.
E-mail: [email protected],
Nanowires of conducting polymers constitute an interesting class of materials for many applications (electronic, magnetic, biomedical and optical approaches).[1]
Electrospinning method has emerged as a promising technique to produce well aligned wires and fibers with nanometric diameters that magnifies the intrachain percolation especially in conductive polymers.[2] In our work, high purity bulk PANI was prepared by a “green” oxidative polymerization of N-4-aminophenyl aniline using hydrogen peroxide as oxidant, under mild conditions in aqueous solution.[3] The polymeric material was identified as conductive emeraldine salt by many spectroscopic techniques as FT-IR, UV-vis and X-ray diffractions.
Because of its poor solubility in common solvents, PANI cannot be directly processed by electrospinning. In this work we have operated reducing the amount of PEO in order to produce PANI wires more pure and we reported the effect of the amount of PEO added in the batches on the morphology of PANI nanofibers and on their resulting electronic conductivity. Scanning electron microscopy has been used to evaluate the morphology of the resultant electrospun fibers. Both the bulk doped PANI and the spun composite fibers have been characterized by means of the complex impedance spectroscopy (EIS) for measuring the electrical conductivity under 0 V, 0.5 V and 1 V at room temperature and static air.
[1] M. Li, Y. Guo, Y. Wei, A. G. MacDiarmid, P. y. Lelkes, Biomaterials 27 (2006) 2705.
[2] S. Ramakrishina, K. Fujihara, W. E. Teo, T. C. Lim, Z. Ma, An Introduction to Eectrospinning and Nanofibers; World Scientific, Singapore (2005).
[3] Z. Chen, C. Della Pina, E. Falletta, M. Lo Faro, M. Pasta, M. Rossi, N. Santo, J. Catal. 259 (2008) 1
Per il restauro del faro di Lazzaretto a Civitavecchia
No full textL'unico faro di età romana oggi ancora esistente in Italia, conservato nella sua altezza, è il faro di Lazzaretto nel porto di Civitavecchia. Purtroppo colpito dai bombardametni dell'ultima guerra e molto mal restaurato negli anni Sessanta dalle autorità militari, minaccia da tempo di crollare. Il lavoro presenta il monumento nella sua architettura e nei suoi valori storici, illustrandone anche lo stato critico, perchè le attuali autorità portuali giungano ad un suo intervento di restauro
The effect of inflation on growth investments: A note
No full textMotivated by the pioneering work of Brenner and Venetia (1983), henceforth designated as BV, a previous note that focused attention on the effect of taxation on the optimal duration of investments in a non inflationary environment (de Faro, 1996), the present note is aimed at investigating the effects of inflation on the optimal duration of investments. Specifically, considering the no reinvestment case only, our objective is to include in the analysis both a numerical illustration of the peculiar results of BV as well as indexation procedures that have been used in some high inflation economies.
Achievement of NKF/K-DOQI recommended target values for bone and mineral metabolism in incident hemodialysis patients: Results of the FARO-2 cohort
No full textMineral Bone Disorders (MBD) is prevalent in hemodialysis (HD) patients and associated with increased cardiovascular mortality. The FARO-2 study evaluated the achievement of the NKF/K-DOQI guidelines on recommended target values for serum calcium (Ca), phosphorous (P) and intact parathyroid hormone (PTH) levels on survival in incident HD patients
Alignment of Sequences Allowing for Non-overlapping Unbalanced Translocations of Adjacent Factors
No full textUnbalanced translocations take place when two unequal chromosome sub-sequences swap, resulting in an altered genetic sequence. Such large-scale gene modification are among the most frequent chromosomal alterations, accounted for 30% of all losses of heterozygosity. However, despite of their central role in genomic sequence analysis, little attention has been devoted to the problem of aligning sequences allowing for this kind of modification. In this paper we investigate the sequence alignment problem when the edit operations are non-overlapping unbalanced translocations of adjacent factors. Specifically, we present an alignment algorithm for the problem working in -time and -space, where m is the length of the involved sequences. To the best of our knowledge this is the first solution in literature for the alignment problem allowing for unbalanced translocations of factors
Meervoudig gebruikte Protestantse kerkgebouwen in de Gemeente Utrecht enpublieke participatie volgens Verdrag van Faro (2005)
No full textHet kerkbezoek daalt, geloofsgemeenschappen worden kleiner en dat kan leiden tot noodgedwongen verkoop van kerkgebouwen. De Gemeente Utrecht bracht in 2017 een kerkenvisie uit om handvatten te bieden aan kerkgemeenten voor het behoud van hun kerkgebouw. Deze visie wordt in dit onderzoek in verband gebracht met het Verdrag van Faro van de Raad van Europa. Faro staat in het teken van de burger die erfgoed ervaart en moedigt publieke participatie aan. In dit onderzoek wordt besproken in hoeverre er al sprake is van publieke participatie – gedefinieerd volgens het Verdrag van Faro (2005) – bij de kerkgebouwen van de Protestantse Gemeente Utrecht (PGU), de Pieterskerk en de Doopsgezinde Gemeente. De verwachting is dat Faro mogelijkheden gaat bieden voor de toekomst van religieus erfgoed. Binnen kerkgemeenten staat publieke participatie namelijk al centraal. Voor dit onderzoek is gesproken met de directeur van de kerkenraad van de PGU, de huismeester van de Pieterskerk en de koster-beheerder van de Doopsgezinde Gemeente. Er wordt onderzocht hoe deze kerkgemeenten met meervoudig gebruikte protestantse kerkgebouwen functioneren, hoe de geïnterviewden hun religieus erfgoed waarderen en of zij bekend zijn met het Verdrag van Faro
Effect of VDRA on survival in incident hemodialysis patients. results of the FARO-2 observational study
No full textBackground: Mortality rate among patients with stage five chronic kidney disease (CKD) maintained on hemodialysis (HD) is high. Although evidence suggests that use of Vitamin D Receptor Activators (VDRA) in CKD patients increases
survival, few studies have examined the effect of VDRA in incident HD patients. The FARO-2 study evaluated the clinical outcome of VDRA therapy on mortality in incident HD patients.
Methods: FARO-2 was a longitudinal epidemiological study performed on 568 incident HD patients followed prospectively from 26 dialysis centers over a 3-year period. Data were collected every 6 months using a questionnaire, obtaining clinical, biochemical and therapeutic parameters. Kaplan-Meier curves and Cox proportional hazard regression models were used to determine cumulative probability of time-to-death and adjusted hazard ratios.
Results: 568 patients (68% male) with an average age of 65.5 years were followed up. Mean dialysis duration at study entry was 3 months. VDRA use increased from 46% at 6 months to 54.7% at 36 months of follow-up (p = 0.08). No difference was observed in the presence of comorbid diseases at baseline in patients with and without VDRA therapy. Cumulative probability of survival at 24 months was 74.5% (95% CI: 70.2-78.3). Patients
receiving VDRA therapy showed a significant increase in survival at 24 months (80.7%; 95% CI: 75.7-84.8) compared to those without (63.3%; 95% CI: 54.8-70.7, p <0.01). The presence of vascular disease, decreased hemoglobin,
increased P and lack of VDRA treatment were significantly associated with an increased risk of mortality. Lack ofVDRA treatment still remained significant as a predictor of mortality after adjusting for levels of PTH, P and Ca (HR = 2.16, 95% CI: 1.09-4.30, p = 0.03).
Conclusions: Findings from FARO-2 indicate that in incident HD patients VDRA therapy was associated with increased survival
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