2,697 research outputs found
El mercuri s'ha triplicat als nostres oceans
No full textL"ACTIVITAT INDUSTRIAL INCLOU PROCESSOS molt diversos que sovint generen productes potencialment contaminants, que s"han estat abocant al medi ambient amb més o menys control des de l"inici de la Revolució Industrial. Alguns d"aquests productes poden ser reciclats pels mateixos cicles naturals, geoquímics i biològics, però d"altres es van acumulant, com és el cas del mercuri. Un estudi publicat a la revista Nature, encapçalat per Carl H. Lamborg, de la Woods Hole Oceanographic Institution de Massachusetts, als EUA, indica que la quantitat de mercuri als oceans s"ha triplicat des de la Revolució Industrial i, malgrat que el nivell actual encara és raonablement lluny de ser considerat tòxic per a les persones, pot començar a alterar els ecosistemes marins. A més, com assenyalen els autors del treball, la capacitat dels oceans per dissoldre el mercuri acumulat es podria estar esgotant, la qual cosa implicaria que, si no es prenen mesures que evitin els abocaments incontrolats, el seu ritme de penetració dins els ecosistemes i, a la llarga, en l"alimentació humana, podria augmentar de manera exponencial
Option pricing in a Garch model with tempered stable innovations
No full textThe key problem for option pricing in Garch models is that the risk-neutral distribution of the underlying at maturity is unknown. Heston and Nandi solved this problem by computing the characteristic function of the underlying by a recursive procedure. Following the same idea, Christoffersen, Heston and Jacobs proposed a Garch-like model with inverse Gaussian innovations and recently Bellini and Mercuri obtained a similar procedure in a model with Gamma innovations. We present a model with tempered stable innovations that encompasses both the CHJ and the BM models as special cases. The proposed model is calibrated on S&P500 closing option prices and its performance is compared with the CHJ, the BM and the Heston-Nandi model
Forensic Palynology: methods and future.
No full textLavori Originali / Original Articles3 A.M. Mercuri, A.TravagliniL’incontro di Roma e la Palinologia Forense in Italia / The meeting of Rome on Forensic Palynology7 D.C. MildenhallForensic palynology: an increasingly used tool in forensic science / Palinologia Forense: uno strumento dellaScienza Forense sempre più usato11 A.M. Mercuri, I. Massamba N’siala, L. OlmiPolline giallo: la palinologia applicata alle Scienze Forensi / The yellow pollen: palynology applied to ForensicSciences20 A.Travaglini, S. Silvestri, E. Mei, E. Marcelli, P. MontagnaIl Progetto: “Palinologia Forense: esperienze a Roma” / The project: “Forensic Palynology at Rome”25 M. Boi, G. Servera Vives, M. Capó Martí, L. Llorens GarcíaI cavalli e le loro qualità come campionatori pollinici / Horses as pollen trap34 M. Mariotti Lippi, A.M. MercuriPalynological analyses applied to a case of kidnapping in Italy / Indagini palinologiche applicate ad un casodi sequestro di persona39 A.Travaglini, E. MeiUn caso di omicidio per la palinologia forense / A homicide case for Forensic Palynology44 C.A. Accorsi, L. Forlani, F. Rossi, E. Del Borrello, G.Trevisan, A. CicognaniPalinologia e tossicologia in un caso di omicidio con notevole interesse forense / Forensic palynology andtoxycology in a interesting case of murder49 M. Marchesini, S. MarvelliIl contributo delle indagini palinologiche alle cause di morte di Cangrande della Scala, signore di Verona(1291-1329 d.C.) / The contribution of palynological analyses to the recognition of death-leading causes ofCangrande della Scala, master of Verona (1291-1329 a.D.
Mediterranean culture and climatic change: past patterns and future trends
No full textThe Mediterranean basin has always featured, and still has, ' extremely rich environmental and cultural biodiversity. The ( mosaic of habitats distributed around the Mediterranean ) basin was primarily transformed by climatic changes occur- !* ring at a global scale. In the meantime, the environment has !! been continuously exploited and the landscape shaped. !" Mediterranean is in fact a key region that is worldwide as the !# house for many of the most ancient civilizations.
! environment. Changes to biotic and abiotic systems have "% been so dramatic that human ecologists focused their atten- "& tion on the impact of human activities on the biotic world, "' and geologists proposed a new epoch the Anthropocen
El mercuri s'ha triplicat als nostres oceans
No full textL"ACTIVITAT INDUSTRIAL INCLOU PROCESSOS molt diversos que sovint generen productes potencialment contaminants, que s"han estat abocant al medi ambient amb més o menys control des de l"inici de la Revolució Industrial. Alguns d"aquests productes poden ser reciclats pels mateixos cicles naturals, geoquímics i biològics, però d"altres es van acumulant, com és el cas del mercuri. Un estudi publicat a la revista Nature, encapçalat per Carl H. Lamborg, de la Woods Hole Oceanographic Institution de Massachusetts, als EUA, indica que la quantitat de mercuri als oceans s"ha triplicat des de la Revolució Industrial i, malgrat que el nivell actual encara és raonablement lluny de ser considerat tòxic per a les persones, pot començar a alterar els ecosistemes marins. A més, com assenyalen els autors del treball, la capacitat dels oceans per dissoldre el mercuri acumulat es podria estar esgotant, la qual cosa implicaria que, si no es prenen mesures que evitin els abocaments incontrolats, el seu ritme de penetració dins els ecosistemes i, a la llarga, en l"alimentació humana, podria augmentar de manera exponencial
Potential role of ustekinumab in the treatment of chronic plaque psoriasis
No full textPsoriasis is a relatively common, chronic and disabling skin disease, with an immune-related pathogenesis and a genetic background which may be triggered by several environmental factors including smoking and infections. There is no cure but several treatment options are available. The treatment of psoriasis is far from being satisfactory due to impractical modalities of topical treatment and suboptimal safety profile of the systemic treatments available. In the last few years, parallel to an improved understanding of the disease pathogenesis, there has been a boost in research on new agents for the treatment of psoriasis. Ustekinumab, a monoclonal antibody targeting the p40 subunit of interleukin (IL)-12 and IL-23, is one such new agent. Psoriasis and its management are briefly reviewed before focusing on the evidence for ustekinumab in the treatment of chronic plaque psoriasis through a systematic search of the main registries of ongoing trials up to December 2009. Ustekinumab proved to be very effective short term in the control of clinical manifestations in psoriasis compared with placebo and with etanercept. Long-term and comparative data are still limited. There is a need for continuing research on the long-term effectiveness and safety of the drug
Palinologia E Archeobotanica: ‘Aerobiologia 2.0’: A simple software to handle 24 hour and 2-hour aero-polle. Data
No full textETS: volatilità dei carbon credits e incertezza della regolazione
No full textIl mercato europeo delle quote di emissione, nell’ambito dell’ Emissions Trading Scheme (ETS), presenta una vivacità che non trova giustificazione nei fondamentali (emissioni vs quote). Il prezzo delle quote è caratterizzato da una volatilità che attrae gli operatori finanziari e non stimola gli investimenti industriali di riduzione delle emissioni. La rincorsa della Commissione Europea verso target di riduzione sempre più ambiziosi non contribuisce a stabilizzare il mercato, che risente di un quadro normativo in continuo cambiamento.Within the Emissions Trading Scheme, the emission allowances’ market shows a vivacity that does not seem to be justified by the underlying market fundamentals. The high volatility of the emission allowances’ price attracts many financial brokers but it does not promote long-term emissions’ abatement investments. The European Commission’s will to set more ambitious reduction targets does not contribute to stabilize the market whose fundamentals are affected by an unstable and continuously changing normative framework
Epidemiology of comorbidities in psoriasis
No full textEpidemiological studies have shown that, in patients with psoriasis, associated disorders may occur more frequently than expected. Such comorbidities include, among others, psoriatic arthritis, inflammatory bowel disease, obesity, diabetes, cardiovascular disease, several cancer types, and depression. Comorbidities often become clinically manifest years after onset of psoriasis and tend to be more frequently seen in severe disease
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