Abstract: Drag force at the bed acting on water flow is a major control on water circulation and sediment transport. Bed drag has been thoroughly studied in sandy waters, but less so in muddy coastal waters. The variation of bed drag on a muddy shelf is investigated here using field observations of currents, waves, and sediment concentration collected during moderate wind and wave events. To es...

A disposable porous bed viscometer (PBV) that has rheologic properties related to that of the microvasculature has recently been developed for the measurement of whole blood viscosity (WBV) under conditions of low shear and low stress. The measured endpoint of apparent viscosity with the PBV is the time for a given volume of whole blood to flow a calibrated distance through the porous bed. The ...

Abstract Armoring is forming an armor layer of the riverbed which preceded by transportation bed sediment. Mobile occurs when reaches equilibrium, then eroded, and surface recovers. Therefore, protection formed moving material. This research used a simulation model generated through HEC RAS software version 6.1. The input location was Krasak River, Sleman, Yogyakarta. data for were topography R...

A series of nanospheres composed of temperature-sensitive poly(N-isopropylacrylamide), poly(ethylene glycol) 400 dimethacrylate, and poly(ethylene glycol) 1000 methacrylate was prepared by a thermally-initiated free radical dispersion polymerization method. Insulin was loaded into the nanoparticles by equilibrium partitioning. The loading capacity of insulin into the nanoparticles was 2.1% (2.1...

The estimation of boundary shear stress distribution in a channel is challenge some hydraulic or environment investigations. A new partition model trapezoidal cross-section prismatic with composite roughness has been introduced based on concept standardized using the “zero-shear stress” division lines. Based this model, an “equal local-region velocity” assumption, which can be regarded as impro...