The functional opportunities afforded by disparate morphologies need to be considered by workers attempting to investigate the flight mechanics of any particular animal group, including those attempting to establish the maximum sizes of flying animals.
Rather, the drones coming to a neighborhood near you will be small, some nano in size, capable of flying through city streets and buildings almost undetected, while hovering over cityscapes and public events for long periods of time, providing a means of 24/7 surveillance.
This vein-measurement indicates the health and size of fly populations and suggests the likelihood of epidemics of sleeping sickness, a tsetse-borne parasitic disease that kills tens of thousands of Africans a year.
The particle size of fly ash falls in the range of 60 100 μm.
As particle size of fly ash increased, the strength development of geopolymer was delayed.
The particle size of fly ash is related with several factors, such as coal properties, thermal stability, ash compositions, gasification conditions and structure properties of gasifier.
The particle size of fly ash is quite small, and this is in accordance with the SEM image as shown in Fig. 4b.
The reduction in particle size of fly ash from micron level to the nano level was carried out using a high-energy planetary ball mill (Pulverisette, Fritsch, Germany).
It was also found that the bond strength significantly increased as the mean particle size of fly ash decreases after 28 days curing.
Figure 1 Variation in Particle size of fly ash with milling time (in hours) Figure 2 Variation of Specific surface area of fly ash with milling time (in hours).
