The principle of smoke jamming is studied in detail, smoke dispensing and testing technologies are introduced and the development trend of smoke screen technology is given.
In this paper, through outfield experimental research and theory analysis, the Stokes final sedimentation velocity formula is not demonstrated to adapt to analyzing performance of smoke.
Investigation reveals that smoke particles kinestate is decided mainly by the relative velocity between smoke cloud and particles and the smoke cloud turbulent intensity.
Case studies are clearly useful in showing how dishonest tycoons can come undone, or revealing how tricky dilemmas - whether, say, to fire loyal but inefficient employees - can be finessed.
Another study of high school social networks found less bullying and aggression the higher the density of mixed-sex friendships within a given adolescent network.
These days, as studies in the U.S.show bullying on the rise and parental supervision on the decline, researchers who study bullying say that calling moms and dads is more futile than ever.
This paper studied sensitivity, specificity and practical value and significance of ELISA in the detection of antibodies against Fasciolopsis buski in human sera.
Girls' attraction to pink may seem unavoidable, somehow encoded in their DNA, but according to Jo Paoletti, an associate professor of American Studies, it is not.
But twin studies took a surprising twist in the 1980s, with the arrival of studies into identical twins who had been separated at birth and reunited as adults.
Besides suggesting that the agency reduces the time between approving experiments and sending them into space, it also recommended setting clearer research priorities.
While such vigilant tracking of cancer is a good thing in general, researchers are increasingly questioning whether all of this testing is necessary for the elderly.