Search results for "LC"

Intercomparison of volcanic gas monitoring methodologies performed on Vulcano Island, Italy,

2004

Evolution of Seismicity During a Stalled Episode of Reawakening at Cayambe Volcano, Ecuador

2021

Cayambe Volcano is an ice-capped, 5,790 m high, andesitic-dacitic volcanic complex, located on the equator in the Eastern Cordillera of the Ecuadorian Andes. An eruption at Cayambe would pose considerable hazards to surrounding communities and a nationally significant agricultural industry. Although the only historically documented eruption was in 1785, it remains persistently restless and long-period (LP) seismicity has been consistently observed at the volcano for over 10 years. However, the sparse monitoring network, and complex interactions between the magmatic, hydrothermal, glacial, and tectonic systems, make unrest at Cayambe challenging to interpret. In June 2016 a seismic “crisis” …

Rapid sensing of volcanic SO₂ fluxes using a dual ultraviolet camera system: new techniques and measurements at Southern Italian volcanoes

2012

Volatiles carry crucial information on pre- to sin-eruptive processes at active volcanoes. Measurements of gas emission rates (crater plumes, fumaroles, diffuse soil degassing) therefore improve our understanding of degassing processes and subsurface magmatic and hydrothermal conditions, and contribute to eruption forecasting. Recent technological developments in spectroscopy have allowed, over the last 30 years, the remote sensing of magmatic volatile emissions from quiescent and erupting degassing volcanoes. These data-sets have contributed to discovering cyclic gas flux components due to periodic magma supply and replenishment in magma storage zones, and/or timescales of magma migration …

Are the Salinelle mud volcanoes threatening human health or are anthropogenic activities threatening the Salinelle mud volcanoes?

2012

Passive samplers were used to measure the atmospheric concentrations of SO2 naturally emitted at three volcanoes in Italy (Etna, Vulcano and Stromboli) and of H2S naturally emitted at three volcanic/geothermal areas in Greece (Milos, Santorini and Nisyros). The measured concentrations and dispersion patterns varied with the strength of the source (open conduits or fumaroles), the meteorological conditions and the area topography. At Etna, Vulcano and Stromboli, SO2 concentrations reach values that are dangerous to people affected by bronchial asthma or lung diseases (>1000 μg m−3). H2S values measured at Nisyros also exceed the limit considered safe for the same group of people (>3000 μg m−…

High-Frame Rate Thermal Imagery of Strombolian Explosions: Implications for Explosive and Infrasonic Source Dynamics

2012

¿Una nueva vertiente en el Volcán Copahue?: El caso del río Colorado.

El volcán Copahue (37°51′08″S–71°10′03″O) ha sido uno de los más estudiados del cinturón volcánico Argentino-Chileno, desarrollándose numerosos trabajos desde el punto de vista geoquímico, y en particular abarcando el estudio de las aguas del sistema. Dichos trabajos se concentran en su mayoría en las nacientes del sistema volcánico hidrotermal (SVH) (Agusto et al, 2012). Sin embargo, existen varios afluentes que alimentan al rio Caviahue de los cuales no se tiene mayor información. El objetivo de este trabajo es dterminar el origen de uno de ellos, el río Colorado. Desde el flanco E del volcán emanan dos vertientes ácidas (pH 1-2,5) y calientes (35-45°C) que se unen para formar el río Agri…

Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated

2018

International audience; Beyond the classical paradigm that presents the Anticipatory Postural Adjustments (APAs) as a manner to create forces that counteract disturbances arising from the moving segment during a pointing task, there is a controversial discussion about the role APAs to facilitate the movement and perform a task accurately. In addition, arm kinematics features are classically used to infer the content of motor planning for the execution and the control of arm movements, The present study aimed to disentangle the conflicting role of APAs during an arm-pointing task in which the subjects reach a central diode that suddenly turns on, while their postural stability was manipulate…

Interaction between students and class teachers in vocational education and training: ‘Safety distance is needed’

2020

Interaction between students and teachers is fundamental and has therefore been widely studied in education. However, there have been few studies on intensive spe-cial support being provided to vocational education and training (VET) students. Firstly, the focus of this article is on students’ perceptions of interactions with their class teachers. Students (aged 17–34 years) from four Finnish vocational institutions providing intensive special support were interviewed. According to the findings, the demands students placed on their class teachers and for interactions with them were modest and their perceptions of both were favourable. Interactions seemed to be study-orientated and class tea…

Kokousvuorovaikutuksen tehtäväkeskeiset funktiot sairaalajohtoryhmässä

2015

Kokous on tärkeä työelämän vuorovaikutustilanne, joka mahdollistaa yhteisen ymmärryksen rakentamisen ja jossa vuorovaikutuksella on useita funktioita. Kokouksia on kuitenkin tutkittu niiden merkittävyyteen nähden vain vähän, ja erityistä tarvetta on havainnointitutkimukselle. Tässä tutkimuksessa tarkastellaan kokouksen vuorovaikutusta vuorovaikutuksen tehtäväkeskeisten funktioiden näkökulmasta sairaalan toimialuetason johtoryhmäkokouksissa: tavoitteena on kuvata, millaisia tehtäväkeskeisiä vuorovaikutusfunktioita kokousvuorovaikutuksessa esiintyy ja miten ajankäyttö jakautuu eri vuorovaikutusfunktioiden välillä. Kokousvuorovaikutus määritellään ja tuloksia pohditaan strukturaatioteoreettise…

Irtisanominen vuorovaikutustilanteena

2019

Irtisanomistilanne on vaikea irtisanottavalle mutta haastava myös irtisanojalle. Irtisanomistilanteesta on johtajille tarkoitettua opaskirjallisuutta, mutta tutkimusta on niukasti, ja varsinkin vuorovaikutuksen näkökulma on tutkimuksesta puuttunut. Tutkimme irtisanottujen kokemuksia irtisanomistilanteesta ja sen vuorovaikutuksesta. Tavoitteena oli selvittää, kuinka irtisanotut kuvaavat johtajan ja itsensä välistä vuorovaikutusta huonon uutisen eli irtisanomisen kertomis- ja kuulemistilanteessa. Tarkasteltavina ovat kokemukset sekä oman itsen että johtajan vuorovaikutuskäyttäytymisestä. Aineistona olivat kahdeksan irtisanotun avoimet haastattelut, jotka analysoitiin teemoittelun avulla. Haas…