In the display, part of the museum's 20th anniversary celebration, contemporary Native American female artists interpret the world and their place in it through painting, drawing and photography.
With their "eyes" and Enterprise emblems, the tipis look like alien members of Starfleet. The Indian woman has Vulcan ears and is doing the Vulcan salute, of course. To me the message is something like, "When we look at Indians, we see them as some sort of nonhuman species. But really they come in peace, and they're no different than the rest of us. No matter how alien they seem to us, we're all brothers under the skin."
That's the first interpretation that came to my mind, anyway. For more on the subject, see The Indian-Star Trek Connection.
I couldn't find much about Debra Yepa-Pappan on the Web. I gather she's a visual artist, of Jemez Pueblo/Korean ancestry, and married to artist Chris Pappan.
Here's another of her paintings:
Debra Yepa-Pappan, Ceci n’est pas une Indienne (This is not an Indian), 2008.