block ramps are hydraulic structures which are commonly used in river restoration projects. especially in the last few decades, the use of this type of structures have become more and more popular. they furnish a correct balance between the hydraulic functioning and the environmental care, as they minimize the impact on the environment in which they are located. in addition, they can be conside...

This paper studies the system optimum dynamic traffic assignment in a network consisting of a surface street grid and a congested freeway section. Vehicles can be diverted through off-ramps and on-ramps can be metered. The family of solutions are identified graphically using Newell’s queueing diagrams. Because enforcing diversion is still a technological puzzle, these results provide a benchmar...

Block ramps are ecofriendly drop structures, which ensure more stability in the downstream riverbed. The scouring stilling basin bed material generated by rapidly varied flow transition affects of ramp structure. In present study, a modified configuration is tested along with uniform conventional arrangements to check non-cohesive beds block ramps. Uniform horizontal configurations and sill arr...

This paper studies the system optimum dynamic traffic assignment in a network consisting of a hypothetical surface street grid and a congested freeway section. Vehicles can be diverted through off-ramps, and onramps can be metered. The family of solutions are identified graphically using Newell s queueing diagrams. Because enforcing diversion is still a technological puzzle, these results provi...

This study evaluated a range of portable wheelchair ramps to highlight the effect of different product features on ease of use when wheelchair users climb curbs or access vehicles. Twelve portable ramps were evaluated. Although all the ramps were designed to load powered wheelchairs into motor vehicles, they were manufactured in different designs. The ramps were based on a "singlewide" platform...

An electrophysiological analysis of canine single ventricular myocardial (VM) and Purkinje (P) cells was carried out by means of whole cell voltage clamp method. The following results in VM versus P cells were obtained. INa3 was present, had a threshold negative to the fast activating-inactivating INa1, its slow inactivation was cut off by INa1, and contributed to Na+ influx at INa1 threshold. ...

We hypothesized that lacosamide modulates voltage-gated sodium channels (VGSCs) at clinical concentrations (32-100 muM). Lacosamide reduced spiking evoked in cultured rat cortical neurons by 30-s depolarizing ramps but not by 1-s ramps. Carbamazepine and phenytoin reduced spike-firing induced by both ramps. Lacosamide inhibited sustained repetitive firing during a 10-s burst but not within the ...

In current river management, we very often use environment-friendly hydraulic structures when it is required for bed or bank protection due to erosion of a channel. Block ramps are one many methods used stabilize beds. They provide semi-natural solution certain engineering problems in mountain streams. When building block ramps, can the dissipative behavior large rock blocks boulder elements ra...