Search results for "etna"

Vjetnamas kara atspoguļojums trimdas latviešu presē (1965-1973)

2021

Bakalaura darba nosaukums ir ‘’Vjetnamas kara atspoguļojums trimdas latviešu presē (1965-1973).’’ Darba mērķis ir iegūt priekšstatu par Vjetnamas kara ietekmi uz trimdas latviešiem, kuriem piederēja nozīmīga loma Latvijas neatkarības idejas saglabāšanā un latvietības uzturēšanā laikā, kad Latviju bija okupējusi Padomju Savienība (1945-1991). Viens no veidiem kā izpētīt plašāk trimdas latviešu dzīvi un darbu trimdas apstākļos, ir izpētīt viņu sarakstīto presi, kas var kalpot kā spogulis trimdas latviešu idejām, uzskatiem un darbiem. Taču tā kā preses materiāls ir ļoti bagātīgs, tad tika izvēlēta konkrēta tematika, ko pētīt. Šajā darbā tas ir Vjetnamas karš, viens no spilgtākajiem un ietekmīg…

Rainwater-induced leaching of selenium, arsenic and vanadium from Etnean volcanic soils

2009

Active volcanoes emit considerable amounts of contaminants such as As, Se and V. Mount Etna is the biggest volcano of Europe and an excellent geochemical site to study water-soil processes. Due to its volcanic activity, the rainwater has a strong compositional gradient, both in time and space. At present, the behaviour of trace elements in the soils around Mt Etna is poorly understood. To determine the influence of the rainwater pH on the potential mobilization of geogenic pollutants, batch experiments have been performed with synthetic rainwater for 25 soils collected along the flanks of the volcano. Our results show that: i) The maximum concentrations in the leaching solutions are higher …

Nitrogen-fixing cushion Astragalus siculus modulates soil fertility, microclimate, plant facilitation, bacterial and fungal microbiota along an eleva…

2023

Question: Cushion-forming vascular plants are adapted to alpine environments and act as ecosystem engineers by moderating microclimate and creating a fertility island under their canopy. Most of the available studies on cushion ecology have been devoted to plant facilitation, but none used a holistic approach that considers the response of co-existing plant species with other key ecosystem players. Here, we quantified the biogenic effect and facilitation capacity of Astragalus siculus, a spiny nitrogen-fixing cushion plant, and test the hypothesis that the facilitation effect would increase with elevation as stress gradient.Location: Mount Etna, the highest active volcano in the Mediterrane…

Kokemuksia Vietnamista : omaelämäkertatutkimus vieraaseen kulttuuriin sopeutumisprosessista ja sopeutumiskeinoista

2001

The Role of Corporate Social Responsibility and Its Influences on Vietnamese Small and Medium-sized Enterprises (SMEs) in Ho Chi Minh City

2020

In the new era, the importance of Corporate Social Responsibility (CSR) for business organizations is a matter of primary concern and has been researched by scholars around the world. Interest in CSR in business enterprises is often neglected due to its high-cost factor and the enterprises only focused on its operations and profitability for the existence of a business. If the enterprises have a good CSR policy within their development strategy, they will attain greater success. It was deemed that the empirical study adopted a descriptive survey method, 103 data samples were selected from the SMEs for analysis. The results indicated that SME management who adopted and implemented CSR polici…

Toista kieltä vuorovaikutuksessa : kielellisten resurssien jakaminen toisen kielen omaksumisen alkuvaiheessa

2008

Suomalaiset väittävät usein ulkomaalaisille, että suomi on maailman vaikein kieli. Sekä maahanmuuttajien suomen kielen opettajille että kielen oppimisen tutkijoille on kuitenkin selvää, että väite on pohjimmiltaan pötyä. Suomi on opittavissa siinä missä mikä tahansa muukin kieli. Jos suomenkielinen voi oppia esimerkiksi englantia, voi englanninkielinenkin oppia suomea. Mikään kieli ei ole itsessään vaikea tai helppo, vaan kokemus vaikeudesta liittyy oman äidinkielen ja opittavan kielen lingvistiseen ja kulttuuriseen etäisyyteen. Vironkielisille suomi on etenkin alussa helpompaa kuin muille, ja viro on vastaavasti suomenkielisille helpompaa kuin moni muu kieli. Vietnaminkielisille suomi sen …

The cycle of major and trace elements in a volcanic environment

2010

Atmospheric Deposition Of Volcanogenic Major And Trace Elements On Mt. Etna (Italy)

2009

There are a variety of natural and anthropogenic sources of trace elements into the environment, and human activity has drastically changed the biogeochemical cycles and balance of several elements. In the last twenty years many efforts have been spent by the scientific community to better outline the levels of pollutants in the environment on a long-term basis, and to evaluate global large-scale changes. It is generally accepted that volcanic emissions are an important source of gases and particles to the atmosphere, contributing significantly to the natural geochemical cycles of all elements (Nriagu, 1989; Hinkley et al., 1999; Oppenheimer, 2003). Many studies have been carried out on the…

Geogenic and atmospheric sources for volatile organic compounds in fumarolic emissions from Mt. Etna and Vulcano Island (Sicily, Italy)

2012

In this paper, fluid source(s) and processes controlling the chemical composition of volatile organic compounds (VOCs) in gas discharges from Mt. Etna and Vulcano Island(Sicily, Italy) were investigated. The main composition of the Etnean and Volcano gas emissions is produced by mixing, to various degrees, of magmatic and hydrothermal components. VOCs are dominated by alkanes, alkenes and aromatics, with minor, though significant, concentrations of O-, S- and Cl(F)-substituted compounds. The main mechanism for the production of alkanes is likely related to pyrolysis of organic-matterbearing sediments that interact with the ascending magmatic fluids. Alkanes are then converted to alkene and …

New Techniques for real-time volcanic gas measurements: the UV camera

2012

In this study, I take advantage of a novel technique - the UV camera - to image SO2 emissions from the Italian volcanoes with improved high temporal resolution. Here, this technique has been updated to a new configuration (dual-camera system), which combines higher temporal resolution (0.5-1.2 Hz) and improved accuracy relative to the single-camera setup. The methodology has been extensively tested and improved, whilst developing a user-friendly control software (Vulcamera) and a calibration technique (in tandem DOAS-SO2 quartz cells calibration), which simplify instrument deployment, acquisition and data analysis. A first application was focused on SO2 gas flux measurements at individual fuma…