Search results for "Content"
showing 10 items of 1859 documents
Genesis and evolution of the fumaroles of vulcano (Aeolian Islands, Italy): a geochemical model
1981
A geochemical model explaining the presence of fumaroles having different gas composition and temperature at the top of the crater and along the northeastern coast of Vulcano island is proposed. A pressurized biphase (liquid-vapor) reservoir at the depth of about 2 km is hypothesized. Energy and mass balance sheets controlP-T conditions in the system.P-T must vary along a boiling curve of brine as liquid is present. The CO2 content in the steam is governed by the thermodynamic properties of the fluids in the H2-NaCl-CO2 system. On the assumption that oxygen fugacity in the system is between the HM-FMQ oxygen buffers, observed SO2/H2S, CO2/CO, CO/CH4 ratios in the fumarolic gases at the Foss…
Fluorine speciation in topsoils of three active volcanoes of Sicily (Italy)
2008
Fluorine is one of the many environmental harmful elements released by volcanic activity. The content of total oxalate-extractable and water-extractable fluorine was determined in 96 topsoils of three active volcanic systems of southern Italy (Mt Etna, Stromboli and Vulcano). Total fluorine (F) content (F TOT) ranges from 112 to 7,430 mg kg−1, F extracted with oxalate (F OX) ranges from 16 to 2,320 mg kg−1 (2–93% of F TOT) and F extracted with distilled water ( $$ F_{{{\text{H}}_{{\text{2}}} {\text{O}}}} $$ ) ranges from 1.7 to 159 mg kg−1 (0.2–40 % of F TOT). Fluorine in the sampled topsoils derives both from the weathering of volcanic rocks and ashes and from the enhanced deposition due t…
Anaerobic Degradation of the Invasive Weed Solidago canadensis L. (goldenrod) and Copper Immobilization by a Community of Sulfate-Reducing and Methan…
2023
The weed Solidago canadensis L. poses a global threat to the environment as it spreads uncontrollably on roadsides, in forests, fields, meadows, and farmland. Goldenrod emits toxic substances that suppress other plants on the site, displacing wild ones. Thus, goldenrod conquers huge areas very quickly. The use of herbicides and mechanical methods does not solve the problem of the spontaneous spread of goldenrod. On the other hand, many scientists consider goldenrod as a valuable source of biologically active substances: flavonoids, phenolic compounds, vitamins, etc. In this study, we consider Solidago plants as a promising, free (cheap), and renewable substrate for the production of methane…
Lime dusts as a source of environmental pollution in Opole Province
2010
Pyły powstające przy produkcji wapna uważano za nieszkodliwe dla środowiska i w związku z tym były one badane marginalnie, szczególnie jeśli chodzi o właściwości magnetyczne i zawartość metali ciężkich. Celem prezentowanych badań było uzupełnienie luki w tym zakresie. Badania obejmowały pomiary podatności magnetycznej, zawartości minerałów ferrimagnetycznych, metali ciężkich, pH i konduktywność pyłów wapienniczych, a także surowca i paliwa, używanego do produkcji wapna. Próbki zostały pobrane w jednym z zakładów wapienniczych województwa opolskiego. Podobne badania wykonano także dla pyłów pobranych w pobliskiej cementowni stosującej suchą metodę produkcji cementu. Wykazano, że podatność ma…
Analyse multirésolution pour la recherche et l'indexation d'images par le contenu dans les bases de données images - Application à la base d'images p…
2005
Recent content-based image retrieval systems offer an interactive visual browsing of images databases. These methods perform a classification of images (offline) into a search tree for users browsing (online). This approach shows three main problems:1) The size of decriptor vector (n>100) makes distance computing sensitive to dimensionality curse,2) Having many different kinds of attributes into descriptor vector does not help classification,3) In general, classification does not take in consideration users' search context. In this work, we propose a method based on building hierarchical signatures having small increasing sizes, this allows to take users' search context into consideration. …
CLIL Implementation in Greece : Empirical Findings from 2006 to 2020
2023
Abstract Despite the increasing interest in CLIL in Greece over the past decade, Greek CLIL research is largely absent from international review studies. This systematic review focuses on primary and secondary education, and examines peer-reviewed empirical research on CLIL implementation in Greece from 2006 to 2020. A total of 33 items are reviewed using qualitative Content Analysis. Organized according to commonalities shared by their foci, the reviewed items highlight three main research areas of CLIL implementation in Greece: (1) CLIL project evaluation, (2) CLIL students’ development, and (3) CLIL teachers. The reviewed studies suggest that CLIL implementation in Greece tends to be qua…
Social and health care educators' perceptions of competence in digital pedagogy: A qualitative descriptive study
2020
Abstract Background Digitalisation has made digital competence a necessity for those working in social and healthcare. A high degree of competence in digital pedagogy is required of educators to meet the challenge of educating future professionals who are themselves highly digitally competent. Objectives The aim of this study was to describe the perceptions of competence in digital pedagogy that educators in social and healthcare have. Design A qualitative descriptive study. Participants The participants were Finnish-speaking social and healthcare educators (n = 37) working at six Finnish universities of applied sciences (UAS). Methods Group interviews (n = 12) were conducted during spring …
Loneliness Among Older Home-Dwelling Persons: A Challenge for Home Care Nurses.
2021
Solveig Tomstad, Kari Sundsli, Hans Inge Sævareid, Ulrika Söderhamn Centre for Caring Research, Faculty of Health and Sport Sciences, University of Agder, Grimstad, NorwayCorrespondence: Solveig TomstadFaculty of Health and Sport Sciences, University of Agder, Kristiansand, 4604, NorwayEmail solveig.t.tomstad@uia.noAim: To explore how nurses working in the home care service sector perceived the loneliness experienced by older people living at home, and how they met these lonely individuals’ needs.Background: Loneliness is a well-known phenomenon among groups of older home-dwelling people and has been shown to be a health-related problem. Health care professional…
Une nécropole d'hypogées et une minière de silex néolithiques à Vert-la-Gravelle (Vert-Toulon) "La Crayère" (Marne)
2013
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