The phrase "simultaneously upon" is correct and usable in written English.
It is often used in a literal sense to describe two events happening at the same time. For example, you could say, "The two astronauts entered the void simultaneously upon opening the airlock."
In this review, multiple mechanisms can act individually or simultaneously upon the population.
Two color emission and Laser-Induced-Incandescence techniques were performed simultaneously upon a diffusion laminar LPG bunsen flame.
Rand Paul, more than "Green Eggs and Ham" Ted Cruz, represents a threat to both establishment Republicans and liberal Democrats in 2016 because he possesses a unique set of principles that touch simultaneously upon liberal and conservative values.
I tried to learn whether life without consciousness might be preferable to consciousness without life; but to calculate the answers he needed to count several secret variables simultaneously upon his misty fingers, and soon lost track of where he had started.
I tried to learn whether life without consciousness might be preferable to consciousness without life; but to calculate the answers he needed to count several secret variables simultaneously upon his misty fingers and soon lost track of where he had started.
Results from the array confirmed an elevated level of phosphorylation in several RTK, and all four FGFRs (FGFR1 4) were activated simultaneously upon FGF-2 treatment.
It reflected their preoccupations, but simultaneously commented upon them: for all affectation, even his own, was grist to Myles's mill.
See, the guys in charge of this stuff lack creativity and are completely out of ideas…" Thus does the surprisingly likable 21 Jump St (2012, Sony, 15) lay out its self-reflexive stall, sending in Jonah Hill and Channing Tatum to breathe new life into the walking corpse of a TV show (which once launched the career of Johnny Depp) while simultaneously dancing upon its grave.
Two tasks that simultaneously call upon the same subsystem may be expected to interfere with each other.
The paradox is that they are simultaneously dependent upon and, at least in principle, in competition with other PIs in their field.
In the period between 2011 and 2014, Observatorio Panamericano de Paisaje, Territorio y Arquitectura OPPTA simultaneously worked upon risk in five Latin American cities under the topic Emergency Interventions caused by natural and anthropogenic risk phenomena.
