"proof of effort" is correct and usable in written English
You can use it to refer to evidence of how much effort someone has put into a task or project. For example: "His proof of effort was evident in the meticulousness of his work."
In addition, the worker must keep records of the work search activities to provide the state with proof of efforts to find a new job.
The results from this proof-of-concept effort to simulate the population densities of this benthic dinoflagellate suggest promise for more elaborate modeling efforts, and their potential value to protect against human impacts from future CFP outbreaks.
This proof-of-concept effort demonstrates the possibility of applying ARIMA to predict the contaminant transport in the subsurface environment.
Suppose you replaced the Internet's centralized Domain Name System with a blockchain for Internet names (like Namecoin) such that every DNS request included some proof-of-work effort.
The Cocteaus' initial releases –1982's Garlands album, followed by the Lullabies and Peppermint Pig EPs – were almost proof-of-concept efforts with flashes of inspiration, something also borne out by sessions for John Peel.
In fact, according to a Gartner report, Making Big Data Normal With Graph Analysis for the Masses, "By the end of 2018, 70% of leading organizations will have one or more pilot or proof-of-concept efforts underway utilizing graph databases".
For example, it took around 10 years for MelaFind to mature from early proof-of-concept efforts to PMA.
As proof-of-principal efforts progress to engineer oil production in Arabidopsis leaves, the need for transformable biomass crops, such as sweet sorghum, will be required for translation of this trait.
This cautiousness, I gathered, sometimes confounded the fiel's expectations of aggressive running, as proof of constant effort — a blue-collar style for a blue-collar team.
And with almost 14 million viewers tuning in to see the Bake Off final, the proof of the effort the programme-makers put in is clearly in the pudding.
