Search results for "etna"

Review of potential and actual penetration of solar power in Vietnam

2020

With the average solar radiation reaching up to 5 kWh/m2, Vietnam is considered as a country showing an excellent potential for solar power production. Since the year 2000, there have been a lot of studies about the potential of this source in Vietnam. So far, many applications of solar power have been implemented on small, medium, and large scales. In fact, the total capacity of current grid-connected solar power plants has exceeded the planned capacity by 2020 nearly 6 times. However, the studies of solar potential in Vietnam are still incomplete. The policies and mechanisms for developing solar power projects have received attention from the authorities but have not been really satisfact…

Critical Assessments of the Potential for Integrating Renewable Energy into Isolated Grids on Vietnamese Islands: The Case of the An-Binh Grid

2023

Renewable electricity for off-grid areas is widely seen as one of the top choices in supporting local economic development in most countries, and so is Vietnam. Over the years, many isolated networks using renewable energy sources have been deployed for off-grid areas in Vietnam. However, the use of these energy sources in Vietnam’s isolated networks is still facing many challenges due to its infancy here. The issues of reliability and vulnerability of these networks are not given the expected attention. Another challenge is that the issues of the operational security of these systems could also be negatively affected by the variable nature of renewable sources, including static and dynamic…

Guerra ideológica

2007

Active alkaline traps to determine acidic-gas ratios in volcanic plumes: Sampling techniques and analytical methods

2014

In situ measurements have been the basis for monitoring volcanic gas emissions for many years and—being complemented by remote sensing techniques—still play an important role to date. Con- cerning in situ techniques for sampling a dilute plume, an increase in accuracy and a reduction of detection limits are still necessary for most gases (e.g., CO2, SO2, HCl, HF, HBr, HI). In this work, the Raschig-Tube tech- nique (RT) is modified and utilized for application on volcanic plumes. The theoretical and experimental absorption properties of the RT and the Drechsel bottle (DB) setups are characterized and both are applied simultaneously to the well-established Filter packs technique (FP) in the …

Sens et pratiques de l’héritage en contexte diasporique

2022

En partant de la notion de discontinuités pour éclairer les concepts d’héritage et de diaspora, cette étude éclaire le sens et les pratiques des jeunes générations d’origine vietnamienne. L’article se concentre sur les événements qui structurent une temporalité de l’héritage et de la transmission. Le décès et la naissance d’un côté et le retour au Vietnam de l’autre nourrissent un sens de la communauté transnationale, alimentée par des pratiques, parfois digitales, qui se révèlent alors toujours tournées vers les liens familiaux.

Sources, size distribution, and downwind grounding of aerosols from Mount Etna

2006

The number concentrations and size distributions of aerosol particles >0.3 μ diameter were measured at the summit of Mount Etna and up to 10 km downwind from the degassing vents during July and August 2004. Aerosol number concentrations reached in excess of 9 × 106 L-1 at summit vents, compared to 4-8 × 104 L-1 in background air. Number concentrations of intermediate size particles were higher in emissions from the Northeast crater compared to other summit crater vents, and chemical composition measurements showed that Northeast crater aerosols contained a higher mineral cation content compared to those from Voragine or Bocca Nuova, attributed to Strombolian or gas puffing activity withi…

The contingent equilibrium during imbalanced volcano tourism demand through fee estimation: An empirical analysis of tourism in Mt. Etna

2022

Volcanic sites can be considered strategic areas for conservation and protection policies, but such policies may involve considerable costs However, not only are volcanic sites often integral to the tourism industry and, hence, of potential significant benefit to local economies in general; entrance fee income from tourists can also contribute to management and conservation costs in particular. Nevertheless, seasonal variations in tourism demand, resulting in over-and under-tourism situations, may impact on both the level of income generated as well as on the sustainability of sites Therefore, based on a case study of Mt Etna in Italy, this study considers establishing appropriate entry fee…

Measurement Invariance and Construct Validity of the Satisfaction With Life Scale (SWLS) in Community Volunteers in Vietnam.

2022

Worldwide, the Satisfaction With Life Scale (SWLS) has become the most widely used measure of life satisfaction. Recently, an authorized Vietnamese-language version has been introduced. Using a convenience sample comprising community volunteers from Ho Chi Minh City (N = 1073), confirmatory support was found for the cross-national constancy of the one-dimensional structure underlying the SWLS. Corrected item–total polyserial correlations and Omega coefficient were satisfactory. Using multi-group confirmatory factor analysis, configural, metric, and scalar invariance of the SWLS factorial structure were tested by gender, age, marital status, income, and educational level. Strong evidence of …

Insight into eruptive cyclic behavior of Mount Etna during 2011: geophysical and geochemical constraints.

2012

Environmental features and land use of Etna (Sicily — Italy)

2007

Etna is the greatest volcano in Europe and one of the most active in the world. It is a complex strata-volcano formed of lava flows alternating with pyroclastic materials emitted over various eruptive areas which have, over centuries, built up the actual volcano. The climate in the Etna area is basically Mediterranean but rainfall and temperatures are affected by height, exposure of slopes, by winds and by clouds coming from the coast. Temperature distribution is uniform but rainfall is irregular. Moist winds from the sea bring rain to the eastern slopes. Surveys on the pedoclimate show an udometric regime ranging, according to altitude, from xeric to udic and a thermometric regime ranging …