Search results for "SHALLOW"
showing 10 items of 144 documents
Reading comprehension from grade 1 to 6 in two shallow orthographies: comparison of Estonian and Finnish students
2018
The aim was to examine reading comprehension among elementary school students in two shallow orthographies, Estonian and Finnish. Participants were 619 Estonian children (50% boys) and 292 Finnish children (52% boys) whose reading comprehension was assessed in first, second, third, and sixth grades. The results showed that reading comprehension among Estonian and Finnish children was at a similar level by the end of first grade but Finnish children started to have better performance from second grade onward. These findings suggest that the roots of Finnish students’ strong reading skills are nurtured from the very beginning of elementary school. The potential cross-country differences in re…
Lens implant selection with absence of capsular support.
2001
If contact lens or spectacle correction is not viable, little debate exists that the secondary placement of an intra-ocular lens (IOL) is the method of choice in the absence of capsular support. The choice of IOL mainly depends on the preoperative status of the eye (eg, aphakia in children) and the selected location for the implant. Theoretically, there are several IOL implantation approaches in cases without capsular support: an angle-supported anterior chamber (AC) IOL, an iris-fixated ACIOL, an iris-sutured or iris-fixated posterior chamber (PC) IOL and a transsclerally sutured PCIOL. No consensus exists, however, on the indications as well as on the relative safety and efficacy of these…
Derivation of critical rainfall thresholds for landslide in Sicily
2015
Rainfall is the primary trigger of shallow landslides that can cause fatalities, damage to properties and economic losses in many areas of the world. For this reason, determining the rainfall amount/intensity responsible for landslide occurrence is important, and may contribute to mitigate the related risk and save lives. Efforts have been made in different countries to investigate triggering conditions in order to define landslide-triggering rainfall thresholds. The rainfall thresholds are generally described by a functional relationship of power in terms of cumulated or intensity event rainfall-duration, whose parameters are estimated empirically from the analysis of historical rainfall e…
A physically-based and distributed tool for modeling the hydrological and mechanical processes of shallow landslides
2015
This work presents the capabilities of a model, i.e. the tRIBS-VEGGIE-Landslide, in two different versions, i.e. developed within a probabilistic framework and coupled with a root cohesion module. The probabilistic model treats geotechnical and soil retention curve parameters as random variables across the basin and estimates theoretical probability distributions of slope stability and the associated “factor of safety” commonly used to describe the occurrence of shallow landslides. The derived distributions are used to obtain the spatiotemporal dynamics of probability of failure, conditioned on soil moisture dynamics at each watershed location. The framework has been tested in the Luquillo …
Fast solution of diffusive shallow water equations for real time flood prediction
2010
Turve- ja metsätalouden vaikutukset kahden metsäjärven surviaissääskiyhteisöihin : paleolimnologinen tutkimus
2015
Tutkielmassa selvitettiin turve- ja metsätalouden vaikutuksia Martinjärven ja Iso Kivijärven surviaissääskiyhteisöihin paleolimnologisen menetelmän avulla. Järvien sedimenttiprofiileita tarkasteltiin viimeisen 400 vuoden ajalta. Järvet ovat pieniä, matalia humusjärviä ja sijaitsevat Keski-Suomessa Keuruulla vierekkäisillä valuma-alueilla. Surviaissääskiyhteisöjen muutosten perusteella tutkittiin järvien rehevyystason ja humoosisuuden muutoksia ennen ja jälkeen metsätalouden ja turvetuotannon aloittamista. Soiden laajamittainen ojitus metsätalouden käyttöön alkoi 1960-luvulla molempien järvien valuma-alueilla. Martinjärven valuma-alueella aloitettiin lisäksi turpee…
Effects of shallow hydrothermal vents on macroalgal communities
2011
A coupled stability and eco-hydrological model to predict shallow landslides
2011
Knowledge of spatio-temporal dynamics of soil water content, groundwater and infiltration processes is of considerable importance for the understanding and prediction of landslides. Rainfall and consequent water infiltration affect slope stability in various ways, mainly acting on the pore pressure distribution whose increase causes a decrease of the shearing resistance of the soil. For such reasons rainfall and transient changes in the hydrological systems are considered the most common triggers of landslides. So far, the difficulty to monitor groundwater levels or soil moisture contents in unstable terrain have made modeling of landslide a complex issue. At the present, the availability o…
Validation of indirect discharge estimation in open channels by means of lab experiments
2010
Inserimento di restringimenti e ponti in un modello diffusivo 2D di acque basse
2010
Gli effetti su una corrente, causati dalle pile di un ponte, o più in generale da strutture che riducono la sezione trasversale dell’alveo, risultano di particolare interesse per le variazioni idrometriche che comportano alla corrente stessa. Nonostante i numerosi studi teorici e sperimentali di letteratura, l’attuale modellistica numerica diffusiva non integra la presenza di tali manufatti nelle proprie tecniche risolutive. Nella presente memoria viene presentata la metodologia implementata nel modello diffusivo bidimensionale FLOW2D per la valutazione del rigurgito provocato da restringimenti della sezione trasversale, nonché dalla presenza delle campate. I profili di rigurgito ottenuti c…