29 research outputs found
High-resolution morpho-bathymetry of the Gulf of Naples, Eastern Tyrrhenian Sea
ABSTRACTWe present a high-resolution bathymetric map of the Gulf of Naples (Italy), which is surrounded by the two main volcanic complexes of Mt. Somma-Vesuvius and Phlegrean Fields. The morphology is obtained from swath bathymetric in a Digital Terrain Model with a 5 m grid cell size. Bathymetric data display the main seafloor morphologies with a resolution never obtained before. These morphologies include the Ammontatura and Dohrn Canyons, the Penta Palummo, Nisida, Miseno and Banco della Montagna banks, and the bathymetric features of the submerged sector of the Somma-Vesuvius volcano. Overall, a prevailing volcanic nature characterizes the seafloor morphologies located in the northern sector, while the southern one is dominated by sedimentary features. The Final Map could be useful for the evaluation of the volcano-related hazards in the area
Mindfulness-based Emotional Acceptance in Combination with Neurofeedback for Improving Emotion Self-Regulation: a Pilot Study
A feasibility of Mindfulness-based emotional acceptance in combination with neurofeedback for improving emotion self-regulation is presented. This represents, to our knowledge, an unexplored approach in the emotion regulation literature. The study was performed using a low-cost wearable system designed to perform electroencephalography (EEG) outside the clinical setting. The focused EEG feature is the beta-band Power Spectral Density along the midline (FCz-CPz electrodes). Four subjects new to the practice of mindfulness were involved in the experiments. A comparison between two neurofeedback conditions (in a within-subject design) is performed: a) cognitive reappraisal task; b) emotional acceptance task. In both cases the expected decrement of power spectral density in high-beta band linked to the neurofeedback training was found. Emotional acceptance in combination with neurofeedback emerged as a promising emotional regulation strategy
Prospezioni sismiche, geoelettriche ed elettromagnetiche ad alta risoluzione in prossimità della foce del Fiume Volturno
Nell’ambito dell’Obiettivo Realizzativo 2.3 “Sviluppo e allestimento di sensoristica e sistemi innovativi per osservazioni dell’iterazione terra-aria per la qualità dell’aria e degli ecosistemi agro-forestali” del progetto PON I-AMICA (Infrastruttura di Alta tecnologia per il Monitoraggio Integrato Climatico-Ambientale), l’Istituto per l’Ambiente Marino Costiero del Consiglio Nazionale delle Ricerche (CNR-I.A.M.C.) di Napoli, coordinato dal dott. Vincenzo Di Fiore, ha eseguito delle prospezioni sismiche, geoelettriche ed elettromagnetiche in un’area prospiciente la foce del Fiume Volturno.
Tali indagini hanno avuto come obiettivo:
La valutazione dell’intrusione nelle falde acquifere di componenti idrosaline provenienti dalla vicina area costiera;
Lo studio, con risoluzione metrica, della porzione superficiale (0 - 80 metri di profondità) del sottosuolo al fine di caratterizzare, in termini di spessori e di velocità di propagazione, le serie riflettive che caratterizzano l’area in esame
Sviluppo di tecnologie innovative per l’identificazione, monitoraggio, remediation di sorgenti di contaminazione naturale e antropica
La tecnica di rilievo acustico multifascio (“multibeam bathymetry” o “swath bathymetry”) utilizza l’energia acustica per acquisire misure della profondità del fondale marino e rappresenta uno fra i metodi più efficaci di rilievo morfo-batimetrico, in quanto consente, in tempi relativamente brevi, di ottenere una notevolissima quantità di informazioni correttamente georeferenziate sui fondali investigati. Rispetto ai limiti dell’ecoscandaglio a fascio singolo, l’ecoscandaglio multifascio (MBES multibeam echosounder) offre sostanzialmente la possibilità di “riconoscere” e posizionare tutti gli arrivi laterali, sia quelli dovuti al moto della nave che quelli legati alla morfologia irregolare del fondo. Il Side Scan Sonar (SSS) viene utilizzato per la determinazione delle caratteristiche morfoacustiche dei fondali: Rappresenta un'applicazione differenziata del tradizionale principio dell'ecoscandaglio utilizzato per i sondaggi acustici batimetrici verticali, che viene adattato all'impiego per i sondaggi acustici con scansione areale. Il parametro misurato con i sistemi SSS è il backscatter, ovvero la riflessione delle onde dovuta alle caratteristiche di rugosità intrinseche dei materiali
OR1.1 Report sullo stato dell’arte della conoscenza a livello internazionale sull’esplorazione, lo sfruttamento e la conservazione dei depositi di origine idrotermale (GSI)
Il presente report (OR1.1 Stato dell’arte della conoscenza a livello internazionale sull’esplorazione, lo sfruttamento e la conservazione dei depositi di origine idrotermale) è stato sviluppato nell’ambito dell’Obiettivo Realizzativo 1 (OR1) del progetto PON Marine Hazard (PON “R&C" 2007-2013 - Avviso D.D. 713/Ric. del 29 ottobre 2010 - TITOLO III - Progetto PON03PE_00203_1) e costituisce un deliverables al progetto stesso per l’attività “Stato dell’arte della conoscenza a livello internazionale sull’esplorazione, lo sfruttamento e la conservazione dei depositi di origine idrotermale (GSI)” (mese 6).
Tale report rappresenta il completamento delle attività di confronto multidisciplinare svolte attraverso meeting, riunioni e conference dedicate, fondamentale per mettere a fattor comune le conoscenze sullo stato dell’arte e per definire i mezzi adeguati per il rilevamento, la cartografia, la mappatura e la caratterizzazione geochimica dei rilievi, l’indagine delle caratteristiche sedimentologiche di studio del Progetto.
Obiettivi specifici di questo report sono:
a. La presentazione dello stato dell’arte della conoscenza in ambito internazionale sulle aree di venute di fluidi, lo stato dell’arte della conoscenza dei depositi ad esse associati (in termini chimico-fisico, mineralogico e della potenziale ricaduta economica del deep sea mining)
b. L’individuazione (localizzazione) delle aree con presenza di sorgenti di immissione di contaminanti naturali da sistemi sottomarini attivi connessi a strutture vulcaniche e tettoniche su aree con presenza di idrotermalismo del basso Tirreno, arco Eoliano e Canale di Sicilia;
c. La presentazione dello stato dell’arte della letteratura sulle comunità microbiche e definizione delle forme vitali associate ai diversi sistemi idrotermali in funzione delle condizioni chimico-fisiche, della pressione idrostatica, delle relazioni con l’attività vulcanica. La definizione della tipologia di elementi chimici e specie gassose immessi nelle acque marine e loro possibili relazioni con i sistemi di alimentazione profonda
OR1.3 Reportistica dei survey effettuati nel Mar Tirreno sud-orientale e Canale di Sicilia: dati disponibili per OR1
In questo report vengono presentati i dati disponibili per la realizzazione delle attività di OR1 del progetto Marine Hazard (geofisica, campionature di sedimento e dati chimico-fisici della colonna d’acqua). I datasets presentati derivano da campagne oceanografiche eseguite dal CNR nel mar Tirreno SE (Semounts Marsili e Palinuro, alti relativi del fondo mare dell’Arco Eoliano) con focus sulla catena vulcanica del Palinuro (Seamounts Palinuro, Glabro, Enotrio, Ovidio).
Vengono introdotte, quindi, le rappresentazioni cartografiche dei datasets batimetrici, side scan sonar, campionature del fondo, dati magnetici e dati sismici a riflessione già disponibile e in fase di elaborazione
A roadmap for amphibious drilling at the Campi Flegrei caldera: insights from a MagellanPlus workshop
Large calderas are among the Earth's major volcanic features. They are associated with large magma reservoirs and elevated geothermal gradients. Caldera-forming eruptions result from the withdrawal and collapse of the magma chambers and produce large-volume pyroclastic deposits and later-stage deformation related to post-caldera resurgence and volcanism. Unrest episodes are not always followed by an eruption; however, every eruption is preceded by unrest.
The Campi Flegrei caldera (CFc), located along the eastern Tyrrhenian coastline in southern Italy, is close to the densely populated area of Naples. It is one of the most dangerous volcanoes on Earth and represents a key example of an active, resurgent caldera. It has been traditionally interpreted as a nested caldera formed by collapses during the 100–200 km3 Campanian Ignimbrite (CI) eruption at ∼39 ka and the 40 km3 eruption of the Neapolitan Yellow Tuff (NYT) at ∼15 ka. Recent studies have suggested that the CI may instead have been fed by a fissure eruption from the Campanian Plain, north of Campi Flegrei.
A MagellanPlus workshop was held in Naples, Italy, on 25–28 February 2017 to explore the potential of the CFc as target for an amphibious drilling project within the International Ocean Discovery Program (IODP) and the International Continental Drilling Program (ICDP). It was agreed that Campi Flegrei is an ideal site to investigate the mechanisms of caldera formation and associated post-caldera dynamics and to analyze the still poorly understood interplay between hydrothermal and magmatic processes. A coordinated onshore–offshore drilling strategy has been developed to reconstruct the structure and evolution of Campi Flegrei and to investigate volcanic precursors by examining (a) the succession of volcanic and hydrothermal products and related processes, (b) the inner structure of the caldera resurgence, (c) the physical, chemical, and biological characteristics of the hydrothermal system and offshore sediments, and (d) the geological expression of the phreatic and hydromagmatic eruptions, hydrothermal degassing, sedimentary structures, and other records of these phenomena. The deployment of a multiparametric in situ monitoring system at depth will enable near-real-time tracking of changes in the magma reservoir and hydrothermal system
Association of kidney disease measures with risk of renal function worsening in patients with type 1 diabetes
Background: Albuminuria has been classically considered a marker of kidney damage progression in diabetic patients and it is routinely assessed to monitor kidney function. However, the role of a mild GFR reduction on the development of stage 653 CKD has been less explored in type 1 diabetes mellitus (T1DM) patients. Aim of the present study was to evaluate the prognostic role of kidney disease measures, namely albuminuria and reduced GFR, on the development of stage 653 CKD in a large cohort of patients affected by T1DM. Methods: A total of 4284 patients affected by T1DM followed-up at 76 diabetes centers participating to the Italian Association of Clinical Diabetologists (Associazione Medici Diabetologi, AMD) initiative constitutes the study population. Urinary albumin excretion (ACR) and estimated GFR (eGFR) were retrieved and analyzed. The incidence of stage 653 CKD (eGFR < 60 mL/min/1.73 m2) or eGFR reduction > 30% from baseline was evaluated. Results: The mean estimated GFR was 98 \ub1 17 mL/min/1.73m2 and the proportion of patients with albuminuria was 15.3% (n = 654) at baseline. About 8% (n = 337) of patients developed one of the two renal endpoints during the 4-year follow-up period. Age, albuminuria (micro or macro) and baseline eGFR < 90 ml/min/m2 were independent risk factors for stage 653 CKD and renal function worsening. When compared to patients with eGFR > 90 ml/min/1.73m2 and normoalbuminuria, those with albuminuria at baseline had a 1.69 greater risk of reaching stage 3 CKD, while patients with mild eGFR reduction (i.e. eGFR between 90 and 60 mL/min/1.73 m2) show a 3.81 greater risk that rose to 8.24 for those patients with albuminuria and mild eGFR reduction at baseline. Conclusions: Albuminuria and eGFR reduction represent independent risk factors for incident stage 653 CKD in T1DM patients. The simultaneous occurrence of reduced eGFR and albuminuria have a synergistic effect on renal function worsening
Il ruolo dell’economista aziendale quale advisor dell’imprenditore nella composizione negoziata della crisi
Do the Number of Screws and the Use of a Lateral Fibular Autograft Influence the Union Rate in Ankle Arthrodesis? A Systematic Review
CATEGORY: Ankle Arthritis; Ankle INTRODUCTION/PURPOSE: Ankle arthrodesis, well-known as a reliable option to treat end-stage ankle osteoarthritis (AO), may be fixed using screws in various configurations. The purpose of this study was to determine whether the number of screws and the use of a lateral distal fibular autograft during the procedure might influence the union and complication rate. We hypothesized that a greater number of screws and the use of a fibular autograft might increase the union rate and reduce the number of complications. METHODS: Following the PRISMA-compliant PROSPERO-registered checklist, the Medline, Scopus, Web of Science and Cochrane databases were searched, including studies reporting patients affected by AO and undergone Ankle Arthrodesis (AA) using screws as exclusive fixation method. Data were harvested regarding the cohort (sample size, age, sex, etiology), the study design (type of study, level of evidence), the surgical technique (open/arthroscopic procedure, the number of screws, the use of autograft) and the final outcome (union, complication and reoperation rate) at the longest follow-up. The risk of bias was assessed using the modified Coleman Methodology Score (mCMS) was used to assess the methodological quality of studies. Three groups were built based on the type of fixation: arthrodeses fixed with 2 screws (Group 1, G1), with 3 screws (Group 2, G2), and those augmented with a lateral fibular autograft (Group 3, G3). RESULTS: Twenty series of patients from nineteen studies (732 ankles) were selected (G1=252 ankles, G2=209, G3=271). The pooled proportion estimate revealed a similar nonunion rate in the 2-screw group as compared to the 3-screw group (6% vs 1%; p=0.43) The pooled proportion of complications appeared higher in G1 (18%) than in G2 (8%) but it was not significantly different either (p=0.27). After exclusion of 'symptomatic hardware and screw removal' the difference was still not significant (p=0.62) although it resulted lower in G1 than in G2 (3% vs 8%, respectively). The pooled proportion of nonunions (p=0.48) and complications (p=0.76) did not differ between the AA performed without or with a fibular autograft. CONCLUSION: Fixation of Ankle Arthrodesis using three screws as compared to two screws seems to be advantageous in terms of reduced risk of nonunion and complications, although the difference did not achieve statistical significance in this study. The use of an adjuvant lateral distal fibular autograft does not seem to significantly increase the chances of fusion as compared to a no- autograft construct. The evidence provided so far is based on retrospective and short-term follow-up studies of moderate methodological quality. Further comparative and prospective analyses are warranted to define how to achieve the best outcome in Ankle Arthrodesis stabilized using screws