Search results for " Transport"
showing 10 items of 3573 documents
Nonuniform sediment transport and flow characteristics downstream of a hydraulic structure
2014
Evaluating overland flow sediment transport capacity
1998
An equation for evaluating the sediment transport capacity of overland flow is a necessary part of a physically based soil erosion model describing sediment detachment and transport as distributed processes. At first, for the hydraulic conditions of small-scale and large-scale roughness, the sediment transport capacity relationship used in the WEPP model is calibrated by Yalin and Govers' equation. The analysis shows that the transport coefficient Kt depends on the Shields parameter, Y, according to a semi-logarithmic (Yalin) or a linear (Govers) equation. The reliability of the semi-logarithmic equation is verified by Smart's, and Aziz and Scott's experimental data. Then the Low's formula,…
A 1D model for sediment transport simulation
2003
Flow and sediment transport process in vegetated beds: experimental investigation in laboratory flumes
2017
The uncertainty regarding the interpretation of sediment transport phenomena during the transients determines some limitations in mathematical modeling of scouring process. But, quantitative estimate of sediment transport processes is important, especially in river-control engineering and water management projects. To this aim, literature (among others Hoffmans and Booji, 1993; Chrisochoides et al., 2003) shows it is necessary to well predict the flow velocity field, the eddy-viscosity and the bed shear stress in order to make correct calculations in simulating the bed-load transport and the development of scour hole in time. Particularly, the role of turbulent structures, developing within…
Experimental investigation on the role of vegetation on sediment transport mechanism: review of recent results
2012
Infrastructural and Human Factors Affecting Safety Outcomes of Cyclists
2018
The increasing number of registered road crashes involving cyclists during the last decade, and the high proportion of road crashes resulting in severe injuries and fatalities among cyclists constitutes a global issue for community health, urban development, and sustainability. Nowadays, the incidence of many risk factors for road crashes of cyclists remains largely unexplained. Given the importance of this issue, the present study has been conducted with the aim of determining relationships between infrastructural, human factors and safety outcomes of cyclists. Objectives: This study aimed, first, to examine the relationship between key infrastructural and human factors present in cycling,…
Real-time smoothing of car-following data through sensor-fusion techniques
2011
Abstract Observation of vehicles kinematics is an important task for many applications in ITS (Intelligent Transportation Systems). It is at the base of both theoretical analyses and application developments, especially in case of positioning and tracing/tracking of vehicles, car-following analyses and models, navigation and other ATIS (Advanced Traveller Information Systems), ACC (Adaptive Cruise Control) systems, CAS and CWS (Collision Avoidance Systems and Collision Warning Systems) and other ADAS (Advanced Driving Assistance Systems). Modern technologies supply low-cost devices able to collect time series of kinematic and positioning data with medium to very high frequency. Even more da…
Effects of ectopic expression of NGAL on doxorubicin sensitivity.
2012
Neutrophil gelatinase-associated lipocalin (NGAL, a.k.a Lnc2) is a member of the lipocalin family which has diverse roles including stabilizing matrix metalloproteinase-9 from auto-degradation and as siderocalins which are important in the transport of iron. NGAL also has important biological functions involved in immunity and inflammation as well as responses to kidney damage. NGAL expression has also been associated with certain neoplasia and is important in the metastasis of breast cancer. Many advanced cancer patients have elevated levels of NGAL in their urine and it has been proposed that NGAL may be a prognostic indicator for certain cancers (e.g. breast, brain, and others). NGAL exp…
Slow Populations and Tourism
2013
Our initial perspective is that the dynamics of territories and cities/towns that are tourist resorts (or aspire to being one) can be analysed from the point of view of the ‘population’ concept, dear to a certain trend in socio-spatial analysis. Our chapter concentrates particularly on those who, by need or will, pass through places without their own vehicle, but using collective or public transport, as well as walking or cycling, rather than by walker or wheelchair. These ‘slow populations’ enter into a relation with the places they visit or stay at, with the people who live there and the other tourists, following certain methods of which we suggest a sort of classification, aimed at a bet…
Network-based indices of individual and collective advising impacts in mathematics
2020
AbstractAdvising and mentoring Ph.D. students is an increasingly important aspect of the academic profession. We define and interpret a family of metrics (collectively referred to as “a-indices”) that can potentially be applied to “ranking academic advisors” using the academic genealogical records of scientists, with the emphasis on taking into account not only the number of students advised by an individual, but also subsequent academic advising records of those students. We also define and calculate the extensions of the proposed indices that account for student co-advising (referred to as “adjusted a-indices”). In addition, we extend some of the proposed metrics to ranking universities a…