A burst-mode transmitter achieves 6 ns turn-on time by utilizing a fast frequency settling ring oscillator in digital multiplying delay-locked loop and a rapid on-off biasing scheme for current mode output driver. The resistor tuning-based ring oscillator avoids the use of bias voltages and thereby eliminates the related settling time overhead. The calibrated rapid on-off biasing circuit utiliz...

A new tool for studying the process of carbon nanotube chemical vapor deposition (CVD) synthesis is described. By rotating the substrate in situ during the CVD process, the orientation of floating nanotubes with respect to the substrate is changed by interaction with the gas stream. Nanotubes lying on the surface of the substrate, however, will maintain their relative orientation. As a result d...

We propose the possibility of a new phenomenon affecting the settling of dust grains at the terrestrial region in early protoplanetary disks. Sinking dust grains evaporate in a hot inner region during the early stage of disk evolution, and the effects of condensation and evaporation on vertical dust settling can be significant. A 1D dust settling model considering both physical and chemical asp...

The purpose of activated sludge systems is to remove the waste from the polluted water by means of microorganisms. Removing the waste appropriately is one aspect; removing the biosolids from the clean water is another challenge. Hence, the settling tank, in which bioflocs are separated from the liquid by gravity, is a crucial operation in biological wastewater treatment systems. If the settling...

The aim of the present investigation was to evaluate the ability of four root canal sealers against the more resistive Enterococcus faecalis. E faecalis is a common pathogen which is a causative agent of oral cavities. The bacteriostatic effect was studied against the test organism with AH plus, Endorez, Metaplex and Grossmans sealer in 96 well titre plate. After different settling time (20 min...

[1] The dependency of nonsphericity on gravitational settling of mineral dust particles is parameterized for prolate ellipsoids and Reynolds number lower than 2. The settling speed is numerically solved from the momentum equation as a function of particle diameter and aspect ratio. The reduction of settling speed due to nonsphericity is included in the Global Ozone Chemistry Aerosol Radiation a...

The settling velocities of natural, synthetic, and industrial particles were measured in a grid turbulence facility using optical measurement techniques. Particle image velocimetry and 2D particle tracking were used to measure the instantaneous velocities of the flow and the particles' trajectories simultaneously. We find that for particles examined in this study (Rep = 0.4-123), settling veloc...

Many marine populations exhibit high variability in the recruitment of young into the population. While environmental cycles and oceanography explain some patterns of replenishment, the role of other growth-related processes in influencing settlement and recruitment is less clear. Examination of a 65-mo. time series of recruitment of a common coral reef fish, Stegastes partitus, to the reefs of...

Methods for sizing single chamber tanks to remove different amounts of total suspended solids (TSS) have been available for some time. One method found in the literature uses the concept of upflow velocity (v) or the critical settling velocity of a particle in a tank to determine what size particles will be removed in the tank. The critical settling velocity depends on the relationship between ...

We investigated the batch settling behavior of the kaolin slurry and the UK ball clay slurry at various initial solids fractions (phi(0)s) using a computerized axial tomography scanner (CATSCAN). The spatio-temporal evolutions of solids fractions in the consolidating sediments were continuously monitored. Since the interface between the sediment and the supernatant of the investigated slurries ...