Not me and I don't know if it's small enough to answer your question, but at my university there was someone doing research in the area of locating and navigating visually impaired people in the outside and inside of buildings.
While HCI and indoor navigation is a wide area, visually impaired people have another requirements for UX, navigation hints etc. You need to do things more different.
He said that at the time he was doing research there were maybe 50-60 people worldwide who also published papers in the field.
So, when he went on conferences 2 or 3 times he met everytime the same people. But he also said that it's far easier to do some fundamental research in this field.
While HCI and indoor navigation is a wide area, visually impaired people have another requirements for UX, navigation hints etc. You need to do things more different.
He said that at the time he was doing research there were maybe 50-60 people worldwide who also published papers in the field.
So, when he went on conferences 2 or 3 times he met everytime the same people. But he also said that it's far easier to do some fundamental research in this field.