Search results for "Ash"
showing 10 items of 1718 documents
A GIS-Based Model for the analysis of an urban flash flood and its hydro-geomorphic response. The Valencia event of 1957
2016
Summary Flash floods are recurrent events around the Mediterranean region. Extreme episodes activate hydro-geomorphic high-intensity processes with low frequency. In urban environments, the complexity becomes higher due to the existence of very quick-response runoff. However, immediate recovery works remove the urban marks. After a short time both the significance and magnitude of the hydro-geomorphic event become completely unrecognizable. Nevertheless, these episodes generate extensive documentation which is testimony of the processes in almost real time. It is necessary to exploit this source typology in order to draw flood sketches when events far in time may lack a sufficiently rich da…
Using post-flood surveys and geomorphologic mapping to evaluate hydrological and hydraulic models: The flash flood of the Girona River (Spain) in 2007
2016
This paper analyzes the Girona River (Spain) flash flood, occurred on the 12th of October 2007, combining hydrological and hydraulic modeling with geomorphologic mapping and post-flood survey information. This research aims to reproduce the flood event in order to understand and decipher the flood processes and dynamics on a system of prograding alluvial fans. The hydrological model TETIS was used to characterize the shape and dimension of the October 2007 Girona River hydrograph. Subsequently, the flood event was reproduced using the free surface flow module of the model RiverFlow2D. The combination of hydrological and hydraulic models was evaluated using post-flood surveys defining maximu…
Proglacial sediment dynamics from daily to seasonal scales in a glaciated Alpine catchment (Bossons glacier, Mont Blanc massif, France)
2018
The sediment yields of Alpine catchments are commonly determined from streamload measurements made some distance downstream from glaciers. However, this approach indiscriminately integrates erosion processes occurring in both the glacial and proglacial areas. A specific method is required to ascertain the respective inputs from (i) subglacial and supraglacial sediments, (ii) proglacial hillslopes and (iii) proglacial alluvial areas or sandurs. This issue is addressed here by combining high‐resolution monitoring (2 min) of suspended sediment concentrations at different locations within a catchment with discharge gauging and precipitation data. This methodological framework is applied to two …
Thyroid disorders in polycystic ovary syndrome
2017
OBJECTIVE: Thyroid disorders, especially Hashimoto’s thyroiditis (HT), are observed significantly more often in patients with polycystic ovary syndrome (PCOS) than in the general population – approximately 27% and 8%, respectively. This is extremely important in young women, because both disorders are connected with fertility problems. As HT and PCOS occur together, fertility problems may become a serious clinical issue in these patients. MATERIALS AND METHODS: A systematic literature review in PubMed of PCOS- and HT-related articles in English, published until December 2015 was conducted. RESULTS: The reasons for joint prevalence still remain unclear. Genetic and autoimmune backgrounds are…
Hydrogeomorphological analysis and modelling for a comprehensive understanding of flash-flood damage processes: the 9 October 2018 event in northeast…
2020
31 Pags.- 12 Figs.- 5 Tabls. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
Note esplicative a piè di pagina
2021
Il documento presenta 12 note a piè di pagina che esplicitano il significato di alcuni lemmi specialistici afferenti all'ambito della "Teoria e storia della Didattica". La loro presenza nella monografia intitolata "La ricerca didattica in Italia (1950-2020)" è funzionale alla comprensione di alcuni importanti temi presentati nel corpo del testo dei primi tre capitoli.
Chaînage de bases de données anonymisées pour les études épidémiologiques multicentriques nationales et internationales : proposition d'un algorithme…
2009
Background: Compiling individual records coming from different sources is very important for multicenter epidemiological studies; however, European directives and other national legislation concerning nominal data processing must be respected. These legal aspects can be satisfied by implementing mechanisms that allow anonymization of patient data (such as hashing techniques). Moreover, for security reasons, official recommendations suggest using different cryptographic keys in combination with a cryptographic hash function for each study. Unfortunately, this type of anonymization procedure is in contradiction with common requirements in public health and biomedical research because it becom…
In situ synchrotron radiation monitoring of phase transitions during microwave heating of Al–Cu–Fe alloys
2008
The effect of rapid microwave heating has so far been evaluated mainly by comparing the state of materials before and after microwave exposure. Yet, further progress critically depends on the ability to follow the evolution of materials during ultrafast heating in real time. We describe the first in situ time-resolved monitoring of solid-state phase transitions during microwave heating of metallic powders using wide-angle synchrotron radiation diffraction. Single-phase Al–Cu–Fe quasicrystal powders were obtained by microwave heating of nanocrystalline alloy precursors at 650 °C in <20 s.
The effect of early or late R&D inbound alliance on innovation
2016
In the research-and-development (R&D) supply chain, firms can agree an inbound alliance at different times along the R&D process; this decision affects the supplier's effort and the innovation that firms achieve at the end of the agreement. Because the supplier's effort is not entirely observable, firms cannot enforce effort contractually. Early contracts demand greater effort and offer risk-sharing opportunities; in late contracts suppliers have a stronger ex-ante bargaining-power position because of the shorter (and less risky) contract length and the experience suppliers already have. This study argues that later inbound alliances allow a higher innovation value when both partner…
Monetary and non-monetary incentives for educational attainment: design and effectiveness
2020
Abstract The use of extrinsic incentives to steer individual behavior is at the heart of economics and the effects of monetary incentives for students, parents, and teachers on educational attainment have been studied widely. However, the use of monetary incentives may be difficult to scale up because they are potentially expensive and educators and parents may be skeptical about cash for grades. Non-monetary incentives have the potential to mitigate these problems while being cost-effective in increasing educational attainment. This chapter reviews the literature on providing extrinsic, monetary and non-monetary incentives to increase educational attainment. Thereby, we focus on the design…