ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Newly discovered orichalcum ingots from Mediterranean sea: Further investigation (2021)
    Elsevier
    Details
    Publication Date: 2021-04-14
    Description: In February 2016, 47 ingots were found in the seabed of Contrada Bulala (Gela, CL, Italy) near the site where 40 ingots had previously been recovered. The ingots composition was determined to be a Cu - Zn alloy, dated by the archaeologist to the VI century B.C. This specific alloy was then known as Orichalcum. From an archaeological point of view, the first question raised about the new discovery was whether the ingots of the first and the second excavations belonged to the same shipwreck. Following the previous study, an elemental analysis was performed on the ingots from the second finding by using ICP-OS and ICP-MS techniques. The chemometric treatment of the analytical results obtained on both sets, i.e. ingots from first and second discovery, confirms their similarity. Therefore, the two findings can be considered to belong to the same naval load. The lead isotopic ratios were determined on selected/representative ingots to improve the knowledge about this treasure. Results can provide information about probable location of the lead sources, that could be very useful for the reconstruction of the ancient trade routes in the Mediterranean Sea.
    Description: Published
    Description: 102901
    Description: 2IT. Laboratori analitici e sperimentali
    Description: JCR Journal
    Keywords: Orichalcum ingots ; Lead Isotopic ratio ; ICP-OES ICP-MS ; Chemometric approach ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Multidisciplinary study of the “Salinelle" of Paternò mud volcanoes: characteristics of the fluids and possible correlations with Mt. Etna activity (2021)
    INGV
    Details
    Publication Date: 2021-01-07
    Description: Monitoring of hydrothermal fluid emissions can provide detailed information about convective upwelling of geothermal fluids and their geochemical characteristics, as a function of tectonic stress or deeper gas input. In particular, at the Salinelle of Mt. Etna Geosite (Paternò and Belpasso, Eastern Sicily) natural emissions mainly consist of a fluid phase made of salty water, mud, gas and liquid hydrocarbons from an admixture of magmatic and hydrothermal gases. In this framework, our study mainly focused on the thermal and geochemical monitoring of hydrothermal fluids of the most active site, Salinelle dei Cappuccini. Nearby hydrothermal vents (Salinelle del Fiume; Salinelle di San Biagio), were also investigated. Analysis of the magnitude and frequency of seismic events all around Mt. Etna were conducted as well. Analysis of daily temperatures showed a constant trend: higher values (〉 35° C) within the first monitoring period, followed by a strong decrease (down to 9° C), and a new gradual increase over the following months. This trend seems to be linked to magmatic processes occurring at depth below Mt. Etna, and could lead to a modification of the geochemical and thermal characteristics of the fluids issuing at the mud-pools and gas vents of Salinelle. The higher the frequency of seismic events corresponding to higher daily energy released, the higher fluid temperatures observed. Understanding how these fluids blend and what is their relationship with Mt. Etna volcanism can be of great importance in forecasting new eruptive cycles in the case they precede changes in volcanic activity.
    Description: Published
    Description: GD670
    Description: 7A. Geofisica per il monitoraggio ambientale
    Description: JCR Journal
    Keywords: Salinelle ; Mud volcanoes ; Mt. Etna ; Geothermal fluids ; Hydrothermal fluid emissions ; 04.02. Exploration geophysics ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Fuzzy cellular systems for a new computational paradigm (2020)
    Elsevier
    Details
    Publication Date: 2020-11-25
    Description: In this paper a new approach for processing arrays of data is proposed. It is based on fuzzy logic and the concepts of cellular computation. Arrays of simple, identical processing elements (called fuzzy cells) are defined by using fuzzy rules. Moreover, each fuzzy cell interacts with its local neighbors. The overall behavior of these locally interacting fuzzy systems is used to process arrays of data. Some examples of practical applications are proposed. Among these, the new approach is applied to image-processing problems, and to the simulation of heat diffusion phenomena.
    Description: This work was partially supported by the Italian National Research Council (C.N.R.) under the special project "Reti neurali per i sistemi di controllo".
    Description: Published
    Description: 47-52
    Description: 3IT. Calcolo scientifico
    Description: JCR Journal
    Keywords: fuzzy logic ; partial differential equations ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Methanotrophy in geothermal soils, an overlooked process: The example of Nisyros island (Greece) (2020)
    Elsevier
    Details
    Publication Date: 2020-07-13
    Description: A multidisciplinary field campaign was carried out at Nisyros Island (Greece). Hydrothermal gases were sampled and analysed, and CH4 and CO2 fluxes from the soils were measured with the accumulation chamber method. The sampling area (Lakki plain) covers an area of about 0.08 km2, and includes the main fumarolic areas of Kaminakia, Stefanos, Ramos, Lofos and Phlegeton. Flux values measured at 130 sites range from −3.4 to 1420 mg m−2 d−1 for CH4 and from 0.1 to 383 g m−2 d−1 for CO2. The fumarolic areas show very different CH4 degassing patterns, Kaminakia showing the highest CH4 output values (about 0.8 t a−1 from an area of about 30,000 m2) and Phlegeton the lowest (about 0.01 t a−1 from an area of about 2500 m2). The total output from the entire geothermal system of Nisyros should not exceed 2 t a−1. Previous indirect estimates of the CH4 output at Nisyros, based on soil CO2 output and CH4/CO2 ratios in fumarolic gases, were more than one order of magnitude higher. The present work further underscores the utmost importance of direct CH4 flux data because indirect methods totally disregard methanotrophic activity within the soil. Ten soil samples were collected for CH4 consumption experiments and for metagenomic analysis. Seven of the soil samples showed small but significant CH4 consumption (up to 39.7 ng g−1 h−1) and were positive for the methanotrophs-specific gene (pmoA) confirming microbial CH4 oxidation in the soil, notwithstanding the harsh environmental conditions (high temperature and H2S concentrations and low pH).
    Description: Published
    Description: 119546
    Description: 6A. Geochimica per l'ambiente e geologia medica
    Description: JCR Journal
    Keywords: Methanotrophy ; Soil degassing ; Hydrothermal systems ; Methane output ; Greenhouse gases ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    CO2 release to the atmosphere from thermal springs of Sperchios Basin and northern Euboea (Greece): The contribution of “hidden” degassing (2020)
    Elsevier
    Details
    Publication Date: 2020-07-13
    Description: Greece is a region characterised by intense geodynamic activity that favours the circulation of hydrothermal fluids in the crust transporting volatiles from either the deep crust or the mantle to the surface. Elevated heat flow values are detectable at Sperchios Basin and North Euboea (central Greece), two areas defined by a system of deeply rooted extensional faults and Quaternary volcanic activity. This setting contributed to the formation of numerous hydrothermal systems, which are mostly expressed as CO2-rich thermal springs with intense bubbling. The CO2 output from six bubbling pools has been determined by flux measurements with the use of the floating chamber method. The highest bubbling CO2 output has been found at Thermopyles and Psoroneria (0.6 and 0.84 t/d, respectively), where the outgoing channels have an elevated flow (〉250 l/s) of gas-charged water (〉15 mmol/l of CO2). Although no bubbling is noticed along the stream, the CO2 content decreases by an order of magnitude after few hundreds of metres, indicating an intense degassing from the water. Taking into account the water flow and the amount of CO2 lost to the atmosphere, the CO2 output of the outgoing channels is quantified in 12.5 t/d for Thermopyles and 9.23 t/d for Psoroneria. Output estimation has also been made for the other springs of the area. The diffuse CO2 release from the outgoing channels has always been higher respect to that of the visible bubbling, suggesting that most of the degassing is “hidden”. Furthermore, the loss of CO2 from the water has determined a shift in dissolved carbonate species as demonstrated by the pH increase along the channel that led eventually to an oversaturation in carbonate minerals and therefore travertine deposition. The total CO2 output to the atmosphere of the study area is estimated at ~27 t/d, with the major contribution deriving from the degassing along the outflow channels of the thermal springs. Such output is comparable to that of the single active volcanic systems along the South Aegean Active Volcanic Arc and highlights the importance of “hidden” degassing along CO2-oversaturated streams.
    Description: Published
    Description: 104660
    Description: 6A. Geochimica per l'ambiente e geologia medica
    Description: JCR Journal
    Keywords: C-cycle ; degassing sources ; stream outgassing ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Il radon e la radioattività ambientale: risultati del progetto di Alternanza Scuola-Lavoro “Misure dell’attività del gas radon nei suoli e nelle acque nel territorio di Cerveteri (Roma, Italia centrale)” (2020)
    INGV
    Details
    Publication Date: 2020-02-25
    Description: During 20172018 academic year, a SchoolWork Pathway (SWP) project has been developed and accomplished with the collaboration of students attending the last year of the scientific high school of Cerveteri (Rome). The main focus of the project was to introduce students to an environmental problem that is not well known but it is locally present. The project has been addressed to the study of natural radioactivity due to the presence of tuff outcrops (Tufo rosso a scorie nere and Tufi stratificati varicolori di Sacrofano, deriving from middlelower Pleistocene volcanic activity) that naturally produce the radioactive gas radon. Thus, the Cerveteri area has a natural radioactivity but radon is a gas that can migrate and easily escape in the atmosphere. However, tuffs can be used as building material and, in this case, radon can accumulate in houses and closed spaces (basements and cellars). The SWP project has been developed by means of lectures, experimental measurements and data elaboration of gas radon activity in soil, indoor (in the students’ houses) and dissolved in water. Results have highlighted moderate (〉16000 Bq/m3) but localized anomalies of soil gas radon and mediumlow (〈 200 Bq/m3) values of indoor radon excepting some cases exceeding the threshold (〉 300 Bq/m3) recommended by 2013/59 Euratom Directive.
    Description: Published
    Description: 1-24
    Description: 6A. Geochimica per l'ambiente e geologia medica
    Description: N/A or not JCR
    Keywords: indoor radon ; alternanza scuola lavoro ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    La distribuzione del radon indoor in alcuni settori della città di Roma. Ricercatori e studenti in un progetto innovativo: dalla raccolta del dato alla stesura di un articolo scientifico (2020)
    INGV
    Details
    Publication Date: 2020-03-03
    Description: All’interno dei percorsi forma vi di Alternanza Scuola­Lavoro un gruppo di ricercatori dell’Istituto Nazionale di Geofisica e Vulcanologia ha proposto e sviluppato con una terza classe del Liceo Scientifico Cavour di Roma un progetto riguardante l’avvicinamento degli studenti al mondo della ricerca scientifica, allo scopo di affrontarla e svilupparla in tu e le sue fasi. Dopo aver spiegato e condiviso l’obiettivo della ricerca con gli alunni, la prima fase del progetto ha riguardato la raccolta dei da tramite l’utilizzo di strumenti di misura; si è in seguito proceduto all’analisi dei dati ottenuti , attraverso un foglio elettronico di calcolo, la produzione di grafici e mappe tema che e infine la scrittura di un articolo scientifico (parte essenziale del lavoro del ricercatore) con la descrizione della ricerca svolta e dei risultati ottenuti . La ricerca ha riguardato la distribuzione del radon indoor in alcuni rioni di Roma. Gli studenti hanno avuto la possibilità di misurare il radon indoor tramite strumenti specifici nelle loro abitazioni e nella loro scuola, di analizzarne la distribuzione spaziale e temporale e di individuare dei casi particolarmente anomali. Sono stati quindi evidenziati i legami tra i valori misura , la geologia del sottosuolo e le tipologie abitative, illustrate per mezzo di mappe tematiche, facendo confluire il tutto o nella scrittura di un articolo scientifico. Il presente rapporto tecnico è stato introdotto dai ricercatori e sviluppato dagli studenti .
    Description: Published
    Description: 1-24
    Description: 1TM. Formazione
    Description: N/A or not JCR
    Keywords: radon ; 05.09. Miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...