The phrase "about their relevance" is correct and usable in written English.
It can be used when discussing the importance or significance of a particular topic or subject matter.
Example: "The researchers held a discussion about their relevance in the current academic landscape."
Alternatives: "regarding their significance" or "concerning their importance".
NGOs are increasingly concerned about their relevance in the future and are examining their business models, and rightly so.
Of course, sustainability professionals still confront objections within their companies when introducing these new systems, usually over the cost or doubts about their relevance to a firm's overall strategy.
Instead, he said, companies that have not made a smooth transition into mobile, like Microsoft, Dell and Hewlett-Packard, are the ones that should worry about their relevance in a world that is moving to smartphones and tablets.
She said other charities, like the National Kidney Foundation, worry about their relevance: "Are people going to care about kidneys?" Washington has been at war before, perhaps most strikingly in the memory of the city's elders in the months after Pearl Harbor, when 5,000 new war workers arrived each month, David Brinkley recalled in his 1988 memoir, "Washington Goes to War".
As with the advent of nuclear weapons, the appearance of revolutionary war did not displace old-style militaries countries, particularly the superpowers, still had vast arrays of tanks, submarines, jet fighters, and rocket launchers but it raised large questions about their relevance.
So how can we interpret the coefficients in order to draw conclusions about their relevance?
Classicism is an approach that takes up these problems as they occur, without worrying too much about their contemporary relevance or their permanence.
People on these panels, he said, are forever worrying about their personal relevance and effectiveness, and feel that if they deviate too far from the consensus, they will not be given a serious role.
Technological advances have always produced concerns among workers about their continued relevance.
But the magnitude of extreme natural processes alone does not convey any information about their social relevance.
However, for most of them there are no robust data about their functional relevance.
