Search results for "LCA"
showing 10 items of 1995 documents
Ancient xenocrystic zircon in young volcanic rocks of the southern Lesser Antilles island arc
2017
Abstract The Lesser Antilles arc is one of the best global examples in which to examine the effects of the involvement of subducted sediment and crustal assimilation in the generation of arc crust. Most of the zircon recovered in our study of igneous and volcaniclastic rocks from Grenada and Carriacou (part of the Grenadines chain) is younger than 2 Ma. Within some late Paleogene to Neogene (~ 34–0.2 Ma) lavas and volcaniclastic sediments however, there are Paleozoic to Paleoarchean (~ 250–3469 Ma) xenocrysts, and Late Jurassic to Precambrian zircon (~ 158–2667 Ma) are found in beach and river sands. The trace element characteristics of zircon clearly differentiate between different types o…
The use of shallow dripwater as an isotopic marker of seepage in karst areas: A comparison between Western Sicily (Italy) and the Harz Mountains (Ger…
2013
Abstract The isotopic signature of slow-flowing dripwater collected in caves located in Western Sicily (Italy) was determined for evaluating its possible use as an isotopic tracer of the local groundwater recharge. These spot measures were compared with a longer series of local rain and spring compositions and with other samples taken, under different hydrogeological conditions, in caves of the Harz Mountains (Northern Germany). The slow flowing dripwater from Sicily showed δ 18 O/δD ratios similar to those of local rain and groundwater, demonstrating that these three are all parent waters. A parallel similarity was found in the vertical isotopic gradient (Δδ 18 O) of the three groups of wa…
Exploring the explosive‐effusive transition using permanent ultra‐violet cameras
2017
Understanding the mechanisms that cause effusive eruptions is the key to mitigating their associated hazard. Here we combine results from permanent ultraviolet (UV) cameras, and from other geophysical observations (seismic very long period, thermal, and infrasonic activity), to characterize volcanic SO2 flux regime in the period prior, during, and after Stromboli's August–November 2014 effusive eruption. We show that, in the 2 months prior to effusion onset, the SO2 flux levels are 2 times average level. We explain this anomalously high SO2 regime as primarily determined by venting of rapidly rising, pressurized SO2-rich gas pockets produced by strombolian explosions being more frequent and…
Evaluación del comportamiento energético de las estaciones depuradoras de aguas residuales: Una aproximación económica
2019
Las Estaciones Depuradoras de Aguas Residuales (EDARs) son una pieza básica del conjunto de infraestructuras urbanas, ya que son indispensables para garantizar la salud pública y del medio ambiente. Actualmente, en España existen aproximadamente 3.000 EDARs que tratan 4.700 hm3 de aguas residuales, de los cuales la mayor parte, un 55,8% y un 33,5% son vertidos a cauces fluviales y al mar, respectivamente, mientras que un 10,4% es reutilizado en la agricultura y el riego de jardines, y el 0,3% restante es infiltrado al suelo para la regeneración de acuíferos y otros fines. Según el destino del agua residual, la normativa en materia de aguas residuales urbanas y reutilización requiere el cump…
Life cycle methods for environmental assessment of nanotechnology
2012
Tämä tutkielma on kirjallisuuskatsaus, joka antaa yleissilmäyksen erilaisiin elinkaarimetodeihin, joilla voidaan arvioida nanoteknologiaa sisältävien tuotteiden ympäristövaikutuksia. Työssä selvitetään elinkaariajattelun tärkeys ja kuvataan erilaisia ympäristöarviointimenetelmiä. Tässä tutkielmassa tarkastellut menetelmät ovat elinkaariarvionti (LCA), hiilijalanjälki, vesijalanjälki, ekologinen jalanjälki ja ekologinen selkäreppu (MIPS). Työ käsittelee nanoteknologiaan liittyviä ympäristöasioita ja tarkastelee elinkaarimenetelmien soveltamista ja soveltuvuutta nanoteknologiaan. Työn tuloksena raportoidaan, että kuvatut ympäristöarviointimenetelmät soveltuvat nanoteknologian vaikutusten arvi…
L'emigrazione albanese in Italia tra il XIV secolo e la prima metà del XV
2011
A Simplified LCA Tool for Solar Heating and Cooling Systems
2016
Abstract This paper presents a user-friendly Life Cycle Assessment tool, which aims to support researchers, designers and decision-makers in evaluating the life cycle energy and environmental advantages related to the use of solar heating and cooling (SHC) systems in substitution of conventional ones, considering specific climatic conditions and building loads. The tool was developed within the Task 48 “Quality Assurance & Support Measures for Solar Cooling Systems”, promoted by the International Energy Agency in the framework of the SHC Programme.
Review on Life Cycle Assessment of Solar Photovoltaic Panels
2020
The photovoltaic (PV) sector has undergone both major expansion and evolution over the last decades, and currently, the technologies already marketed or still in the laboratory/research phase are numerous and very different. Likewise, in order to assess the energy and environmental impacts of these devices, life cycle assessment (LCA) studies related to these systems are always increasing. The objective of this paper is to summarize and update the current literature of LCA applied to different types of grid-connected PV, as well as to critically analyze the results related to energy and environmental impacts generated during the life cycle of PV technologies, from 1st generation (traditiona…
Definición de Violencia de Pareja Íntima y formación inicial del profesorado
2023
El presente trabajo es una aportación con argumentos científicos sobre la definición de la Violencia de Pareja Íntima y la formación del profesorado que atiende a los niños víctimas de esta violencia. Los objetivos se centran en saber cuál es la definición de la Violencia de Pareja Íntima utilizada en la literatura científica, conocer si los docentes en formación del grado de magisterio han experimentado abuso y/o maltrato y conocer cuál es el punto de partida conceptual que tienen sobre la Violencia de Pareja Íntima. El procedimiento metodológico utilizado es una revisión de alcance para el primer objetivo y un estudio de encuesta para el segundo y el tercero. Los resultados obtenidos mues…